EP0098493B1 - Chair - Google Patents

Abstract

1. A chair (50.1 - 50.5) with at least a leg frame (51), seat (52) and back (53), wherein the legs (65) are inclined for stacking and the seat (52) and back (53) are secured by connecting means to the leg frame (51), the seat width (57) corresponds approximately to the leg frame external width (58), the seat (52) its cut away at the corner regions (52.1, 52.2, 52.3, 52.4) in a manner corresponding to the position and size of the legs (65) and the legs (65), which lie in the corner regions (52.1, 52.2, 52.3, 52.4) of the seat (52) and which are attached below the said seat and extend almost parallel to the vertical central plane (54), consist of metal profile and, in order to be stackable, have recesses in their external faces, such that, when stacked, the upper leg engages in the lower leg, characterized in that the metal profile of the slender legs (65) has a dumb-bell-shaped cross-section (Fig. 8-11), such that when the chairs are stacked, the thickening (72) of the dumb-bell-shaped cross-section of the upper leg (65) engages in the recess (73) of the dumb-bell-shaped cross-section of the lower leg (65).

Description

The invention relates to a chair with at least the leg frame, seat and backrest, in which the legs are inclined to stack and in which the seat and backrest are fastened to the leg frame with connecting means.

Chairs are among the oldest articles of daily use in humans and are therefore known in an almost unmanageable variety of designs. These configurations are based not only on the actual purpose of sitting or sitting comfortably, but above all on the manufacturing options, the manufacturing costs and, among other things, the options for providing the chair with other objects, such as armrests or coupling devices, for stringing together or various Build chairs from largely similar parts. In addition to wooden leg frames, a variety of metal frames are known. There are two main groups. Some have legs made of pipes and the others have legs made of solid materials made from extrusion or casting in other molding processes. Steel, aluminum and glass fiber reinforced plastics are mainly used. The tubular steel frame usually has a round or square cross section. Chairs that often have to be removed and stored from a hall or the like are designed to be stackable. There are basically two ways of doing this, namely stacking one above the other or inserting one into the other from the front. In the case of chairs which can be plugged one above the other, legs which have been positioned relatively obliquely and come together in the area of the center of gravity support or close to this have been chosen which are arranged approximately in a V-shape. These legs are outside the seat because the relatively flat legs have to slide past the seat over a longer length. Such chairs are explained, inter alia, in DE-A-2 035 974, 2 559 196, 2 624492 and are also widely known in practice in other configurations. Their appearance with the legs lying outside the seat and approaching the center of gravity in a V-shape is considered by many interior decorators to be too sober, so that they immediately give the room the character of a simply furnished room. There is therefore a need to provide a stackable chair that has an appearance that approximates or approximates that of a normal chair. Such chairs are known as stacking chairs, for example from DE-U-7 708 560 and DE-B-2 800 564. These have round, approximately vertical tubular legs, but the rear legs are offset from the front outwards, so that the front legs can be inserted in front of each other and the rear legs next to the sit surface. These chairs also do not allow the appearance of a normal chair with a wide seat to be achieved. In the case of chairs which can be inserted from the front according to DE-B-2 353 341, an arrangement of four vertical legs is not provided and is not possible, but rather a U-shaped bracket must be provided in spaced apart planes. This chair cannot be given the appearance of a chair for a living room or cozy meeting room either. The leg constructions of these chairs each require special, usually quite complex manufacturing and connection techniques.

Furthermore, a stacking chair made of glass fiber reinforced plastic is known in practice (so-called Bofinger chair), in which four legs are integrally formed on the one-piece seat and backrest shell in such a way that the front legs start in the corners of the seat surface, while the rear legs are slightly outside the seat side edge lines are formed so that they are slightly further out than the front legs. All legs are angular in profile with the roof edge pointing towards the center, so that they can interlock when stacked. This chair can be used as a stacking chair, but not as an add-on chair, because the legs are slanted outwards and there are larger gaps between the seats. A similar but one-piece shell chair is known from AU-A-472 411. However, it also has the special appearance and special features of the one-piece plastic shell school and does not allow a slim leg construction like a normal living room chair. A similar sheet metal construction with similar problems is known from CH-A-90 926 and US-A-1 408 114.

The closest chair construction is known from French patent 593 358, which shows the features according to the preamble of claims 1 and 2. This chair has a leg frame, seat and backrest. The legs are slightly inclined to stack. The seat and backrest are attached to the leg frame with connecting means. The seat width corresponds approximately to the width of the leg frame. The seat is excluded in the far-out corner areas depending on the position and size of the legs. In these corner areas, legs made of metal profile with a cross section are arranged under the seat, which is designed such that the upper leg engages in the lower leg when stacked. These legs require a special sheet metal profile design that can only be produced with complex deep-drawing tools or the like. In addition, it requires a very special appearance of the legs with external recesses in the corners, which corresponds approximately to that of the stackable plastic shell chairs and which allows only minimal variation in design because the multi-part sheet metal shell construction is very limited due to the complex sheet metal forming techniques. The legs cannot be made from the same semi-finished profile product by simply sawing and bending into the mold. Otherwise, the production of the entire chair is complex and allows few design variants.

Based on this prior art, the invention has for its object to provide a chair that is designed both stackable and stringable and can be placed very closely next to the next chair in a row with the widest possible seat and also stable when stacked as vertically as possible should be stackable and should be as similar as possible to a chair not intended for stacking and lining up and the frame parts of which are optimized with great stability in terms of manufacture, use of materials and use.

According to the invention it is provided on a chair according to the upper handle of claim 1 that the metal profile of the slender legs has a cross section which is dumbbell-shaped in such a way that, when stacked, the thickening of the dumbbell-shaped cross section of the upper leg engages in the indentation of the dumbbell-shaped cross section of the lower leg.

While in some previous stacking chairs the legs, and at least the rear legs, protruded beyond the width of the seat in the middle, the seat extends beyond the width of the leg frame. For this, the corner areas in which the legs also pierce when stacked from above, in particular also in the rear area, are excluded, that is to say cut off or omitted, so that these areas are free.

They are also not required to support the seated person if they are moved far enough to the rear and to the front. This also makes it possible to tilt the legs only slightly so that they are almost vertical. In order to be able to stack them anyway and to create a stable but slender leg, a shape is selected which, with rough stability, that is to say a favorable moment of area inertia, has areas which are closer to the central axis, so that the further protruding thickening is achieved by appropriate inclined arrangement of the legs can intervene in the indentations when stacked. Such a leg frame can be easily bent from tubes that are easy to manufacture and can be connected with simple and inexpensive means under the seat and with the backrest. Since it is preferably a tubular frame, the relatively large outlay for large-volume die-cast parts or sheet metal parts can be avoided and, nevertheless, an aesthetically interesting appearance deviating from the usual round tube and square tube or rectangular tube can be achieved.

The interlocking of the profiles allows you to achieve a very low stacking height despite the legs lying far out and almost vertically, so that many chairs can be stacked on top of each other in a small space. Because of the vertical stacking, no complicated angular stacking trolleys and the like are required and the stacking space can be optimally used. With the exception of the V-shaped legs next to the seats, almost all other known stacking chairs require stacking to the front or to the rear, so that the push of chairs must be brought into the transport and storage position by suitable aids so that it does not fall over.

The leg frame can be designed in many ways using the appropriate metal profile if only the legs, as described above, protrude slightly beyond the cut-out corner areas.

The connection between the leg frame and the seat can be made in a variety of ways, for example by form-fitting engagement elements or devices with rear hooks and the like. In particular, the connecting means can contain screws, rivets or locking bolts arranged slightly to the inside of the corner bevel under the seat. This enables attachment on a large support base.

The backrest and seat can be designed, for example, as a one-piece shell or have a one-piece shell as the basis for the assembly of the upholstery. Then it only needs to be attached to the leg frame.

Another sensible design for a light, stable and, above all, the varying wishes and needs of the customer meeting the problem of the invention is specified in claim 2. According to the invention, special connecting and supporting parts made of die-cast aluminum holding the seat and backrest are arranged, to which seat and backrest are separately fastened and which have integrally formed cylinder lugs by means of which they are fastened, preferably with screws, to the leg frame. These connecting and supporting parts are designed on both sides of the chair in such a way that a fastening and seat support leg extends approximately horizontally below the edge of the seat side. It is adjoined by a transitional part projecting obliquely to the rear, which merges into a back support leg, which has fastening means for the backrest. In the area of the center of the side edges of the seat, fastening means for connecting elements and / or armrests or writing plates are provided. The metal profile of the leg frame is a flat tube profiled to achieve high stability with good stacking options. The aforementioned connection and support part is relatively small and can therefore be inexpensively made in a suitable molding process from die-cast Aluminum are made and have the mounting holes or the threaded pin and the like. It is then screwed to the leg frame, for example, and you can attach a suitably upholstered seat and backrest or simple, perforated sheet metal or similar molded parts as a seat and backrest to the partially manufactured chair, depending on the customer's wishes. Since the connecting and supporting part is made of die-cast aluminum, it can be manufactured easily and inexpensively despite the relatively complicated shape and, despite great stability, is light in weight and, moreover, as a central element, it can be used as a central element in all connection means requiring precise design and processing in a very small size Component included and thus has a multiple function with regard to requirements that are distributed among different components in known chairs. Due to the integrally formed cylinder lugs, the multiple function of the connecting and supporting parts can be used to determine the relative inclination to one another, particularly for a favorable connection to the tubular steel frame. Further configurations of the connection and support parts made of die-cast aluminum are easily possible. The connecting and supporting parts can also be adapted exactly to the profile shape of the seat and backrest in the edge area and / or suitable for the connection of further elements and designed with sufficient local firmness. The leg frame made of flat tube profile, despite its larger extension, is also relatively light in weight with particularly good stability, but above all simple shapes and offers simple and inexpensive manufacturing options.

The connecting means between the leg frame and the seat are expediently designed as screws, rivets or locking bolts arranged within the boundaries of the chamfered corner areas under the seat.

While previously known stacking chairs, for example according to GB-A-1 239 030, DE-A-2 149 542 and CH-A-438 616, had a leg frame composed of many die-cast aluminum parts or the like, with supporting elements for seat and backrest and also for the long parts required expensive die-casting molds and still did not allow the production of a chair with legs lying far outside and disappearing under the seat, the combination of a leg frame bent from a flat tube profile with small connecting and supporting parts made of die-cast aluminum provides an optimization in terms of production costs, weight, assembly and Variability of attaching the seat, backrest and other connecting parts before, as was previously not possible. The functions requiring complicated shaping are concentrated on a component which is to be provided in mirror image. It can be produced easily and inexpensively in the required shape as a light die-cast molded part, while the formation of the leg frame is free of complex deformations and the attachment of corresponding additional parts. This combination of flat tube leg frame and die-cast molded parts for connecting and supporting parts also allows greater adaptation to the design requirements corresponding to the respective time and customer requirements. This combination of components made of different starting materials, which are produced in different molding processes, in an ideal adaptation to the functions to be performed in each case also goes far beyond what the round tube stacking chair according to US Pat. No. 3,276,818 enables. In the latter, a leg frame formed from two round tubes by multiple bending and welding in the middle has become known. However, due to the round cross section, this does not yet have the stability of a flat tube profile with the same slim appearance. The provided U-shaped and angled retaining bracket carrying seat and backrest corresponds in part functions to the connecting and supporting parts. However, since it is bent from the same round tube as the leg frame and its lateral stability is obtained only by connecting the two parts, but not by the spatial shape possible in the die-casting process, the freedom in the design of the seat and backrest and their attachment is considerably less than that of the different materials and in different manufacturing processes created two main parts of the chair frame according to the invention. Also, this known construction does not provide legs that are far out in the corners, relatively steep in both views, under a seat that covers the full width. Rather, the legs lie outside the edges of the seat and thus only give the chair the outdated appearance of a simple, simple stacking chair, which only allows narrow limits for a design that meets the respective requirements.

CH-A-438 616 shows connecting brackets made of cast aluminum for the rigid connection of the seat shell and backrest shell. However, these are inserted into receiving recesses which are closed on all sides except for the insertion opening in the edges of the seat shell and backrest shell. They are only suitable for specially designed seat shells made of plastic molded shells, but they do not allow the variable design of the seat and backrest and their free support and versatile attachment that corresponds to the respective requirements. In addition, they are only available as round tube brackets together with long aluminum castings for two V-shaped leg pair parts outside the seat side edges and another, in which they are complex to manufacture separate, large shape to be manufactured horizontal connecting bridge. They are not suitable for connecting other elements required for the stacking chair.

The angle parts for holding the seat and backrest according to GB-A-1 239 030 are only suitable for interchangeable seats and backrests to a limited extent because they have open grooves on the inside, into which outwardly projecting holding rails of seat shells and backrest shells engage. For this reason alone, they do not enable a seat that spans the entire width of the chair. Nor do they enable the seats and backrests, which are designed in a variety of ways, to be optionally placed on. The angular parts on one level, as with the other treated chairs, do not allow legs to be stuck inwards in relation to the seat side edges when stacking next to the holding elements of the seat and backrest.

Further embodiments of the group of inventions dealt with in claims 1 and 2 are listed in claims 3 to 18.

A particularly easy to manufacture stable and easy to connect to the seat and backrest design provides that the leg frame consists of two flat tube parts, each with two bent down legs and a possibly multiple bent connector under the seat, both parts under the seat are connected to each other and carry the connection means for the seat and backrest. Other components can also be used to connect the leg parts to one another. The design is particularly simple and stable, however, if the two frame parts are welded to one another in the area of parallel connecting pieces and each have an angle on one side in the direction of the corner of the seat and an angle of the leg there.

A straight piece of pipe only needs to be angled four times and only two identical parts need to be welded together to create an appealing, stable and light stacking leg frame.

Different designs are possible for the dumbbell-shaped flat profile, in particular flat tube profile. In particular, it can be designed in the manner of a gun barrel and z. B. be composed of partial circles, for example consist of two approximately three-quarter circles and intervening inward curved quarter or third circles. This rounded profile is not prone to bulging and can support the high loads cheaply even with low material requirements. The flat tube profile can also be formed from two squares facing one another, the corners turned towards one another merging. You can also form the flat tube profile from two directly adjoining hexagons or from octagons with corresponding connecting bars. The profile tubes can be formed from flat sheet metal in the rolling and rolling process and, above all, longitudinally welded in the area of the indentation. You can also deform a seamless pipe accordingly.

Stacking supports are usually provided in the area of the seat on the seat and / or leg frame for stacking. The special leg design with the stackable metal profile, which, like any metal chair, requires a glider at each end of the leg, allows this to be used as a stacking support element at the same time, since the legs have insertable gliders that are designed to match the tubular profile and that fit the profile and reach the stacking support surface Have stack support pin which is integrally formed on the lower connection and support plate of the slider. For example, the end of the pipe base can be combined with the support during stacking with an element that is easy to produce in the plastic injection molding process, which is advantageous in terms of production and assembly technology and also in terms of price. The slider plug-in pins or stacking support pins can have latching hooks which engage in recesses cut out in the leg profile, so that they are held captive and can also support the stack weight well. A push-in tab can engage in the glider and can be screwed to the floor. For this, the glider can have a recess, so that the chairs can be fixed immovably in a room or in a garden with simple means.

With the large number of known chairs, there is also a large variety of fastening options for armrests. Either they are made in one piece with the legs or they are attached separately. Armrest attachments are customary which have a cross strut in the region of the seat side edge, from which support arms for the armrest project upwards. The cross connection usually has two holes through which screws are screwed for fastening to the leg frame or to the seat shell. Possibly. additional fixations are planned. Fastening with two screws requires a corresponding assembly effort. This is intended to be reduced by the invention. For this purpose, a solution is proposed in which a suspension connection is created between the armrest and leg frame or connecting and supporting part between the leg frame, seat and backrest, which can be secured with a single screw.

For this, the connection and support part or the leg frame or the seat shell in the In the area of the center of the seat side edge, a fastening profile serving to overlap, which, in addition to a seat support fold, has a supporting part which is roof-shaped in cross section, the outer edge of which merges into a fixing surface which is at least approximately 100 ° to 105 ° to the outside roof slope or at 10 ° to 15 ° runs to the inner sloping roof and merges into a vertical screw hole leg. This profile can form a good smooth edge area of the seat frame or its connecting and supporting part that protects against impact and abrasion of the seat cover, without the need for an armrest. For example, a row connection can also be screwed onto the vertical screw bore leg without an armrest.

In a further embodiment of the invention, however, an interchangeably fastened armrest can be provided, which in the lower area has an overlapping profile corresponding to the fastening profile, which has a sufficient support width or at least spaced support surfaces, and a central bore is provided through which a single clamping screw grips that clamps the entire armrest to the fastening profile.

The connecting and supporting part with the vertical screw bore leg can, if necessary, be attached to a row connecting element, which is designed, for example, like a U-shaped profile, one leg of which is shaped into two flat pins, which go up on one side of the chair and down on the other side are directed below and are assigned corresponding recesses in the web profile. In order to design a modular connection element in the same form for attachment to a simple and armchair chair and thus to be able to alternate simple chair and armchair chair in width without loss of space, a further embodiment of the invention provides that the modular connection consists of an im The middle area of the chair-side section consists of metal or plastic, which has two spaced apart flat pins, between which a V-shaped recess with a rounded base remains, and the bottom area is preferably equipped with openings for the flat pin tips of the adjacent element. Such a V-recessed element can be used for any baying connection. For connection to an armrest chair it is assigned a hanging collar part through which the fastening screw of the armrest extends in such a way that the collar protrudes by the flat pin thickness over the outer surface of the armrest fastening in such a way that the collar part from above or below into the rounded V-recess of the neighboring one Chair can be hooked. So only a longer screw with a small cylinder part and a larger washer or a correspondingly manufactured collar part needs to be attached to the armrest chair and it can be attached to simple chairs with the connecting elements by simply hanging in, the distance between the chairs not increasing zti are needed. Then the middle of the armrest can lie above the outer edge of the foot, so that there is always an armrest in the middle between the chairs.

The armrest expediently protrudes outwardly from the fastening part with the cross connection upward support arms, which merge into bearing elements for a pivotable armrest.

A swiveling armrest is known from DE-U-8 103 946. This is used to fold up to a narrower dimension for stacking chairs. For this purpose, it can be pivoted on a one-armed support part by means of a longitudinal pin and can be locked and unlocked by axial displacement. The storage for this is relatively complex and the armrest must be made very stable because it is only supported on one side. In one embodiment of the invention, a two-sided support with a simple pivot bearing and a simple latching lock is to be made available. According to the invention it is provided that for the pivotable armrest, the pivot bearings have outwardly projecting bearing journals, on which the receiving recesses of a plastic armrest, which is sufficiently elastic for assembly, but sufficiently rigid for use, are seated and assigned stop surfaces for the horizontal position and the vertical position are and in the area of one end of the armrest an engagement catch connection is provided, which is associated with an elastic lifting bearing such that the pivotable armrest has an elongated, vertically lying in the horizontal position slot, in which a lifting and pivoting element formed of highly elastic plastic is arranged is, which has a slightly offset from the center upward bearing bore for the bearing journal such that the slightly larger lower part of the lifting and pivoting bearing element is deformable for unlocking and the armrest can be raised thereby.

In addition to the two necessary parts, namely the support arms and the swivel arm rest, such a swivel bearing with lifting lock has only a single additional part, namely the lifting and pivoting bearing element, and furthermore does not require any bearing pins or fixing elements, but can be of a suitable size and material value appropriate dimensioning from the standard prefabricated parts are simply put together and is then easy to use and can be easily pivoted into the two positions.

Exemplary embodiments of the invention are explained and described in more detail below with reference to the drawings.

• Fig. 1 die Vorderansicht eines Stuhles;
• Fig. 2 die Seitenansicht eines Stuhles nach Fig. 1;
• Fig. 3 die Draufsicht auf zwei aneinandergereihte Stühle, von denen der linke nur teilweise und mit teilweise aufgebrochenem Sitz dargestellt ist;
• Fig. 4 die Schrägansicht auf einen Stuhl in gleicher Ausstattung, jedoch plastischer dargestellt und von vorn etwas oberhalb der Mitte gesehen;
• Fig. 5 den Stuhl nach Fig. 4 von hinten, etwas oberhalb der Mitte gesehen;
• Fig. 6 den Stuhl nach den Figuren 4 und 5 von schräg oben diagonal zwischen Sitz und Lehne betrachtet mit etwas durchsichtigem Sitz aus Lochblech;
• Fig. 7 die Seitenansicht von drei übereinander gestapelten Stühlen, wie sie in den Figuren 1 bis 3 dargestellt sind, und den Figuren 4 bis 6 entsprechen;
• Fig. 8 bis Fig. 11 die Querschnitte von jeweils zwei übereinandergesteckten Beinprofilen in vier verschiedenen Profilausführungen, etwa gemäß der Linie 8 - 11 in Fig. 13;
• Fig. 12 die Vorderteilansicht von zwei übereinander gestapelten Stuhlbeinen;
• Fig. 13 die Teilseitenansicht von zwei übereinander gestapelten Stuhlbeinen;
• Fig. 14 die Draufsicht auf einen Stuhlbeinendabschnitt;
• Fig. 15 die Seitenansicht eines Gleiters;
• Fig. 16 die Frontansicht des Gleiters nach Fig. 15;
• Fig. 17 die Draufsicht auf den Gleiter nach den Figuren 15 und 16;
• Fig. 18 die Teilvorderansicht eines Stuhlbeines mit Einstecklasche zur Bodenbefestigung;
• Fig. 19 die Teilseitenansicht eines Stuhlbeines mit Einstecklasche zur Bodenbefestigung;
• Fig. 20 die Teil-Draufsicht auf das Stuhlbeinende mit Einstecklasche zur Bodenbefestigung;
• Fig. 21 die Vorderansicht von zwei nebeneinandergesetzten Stühlen, die den vorstehend genannten Stühlen entsprechen, jedoch mit Armlehnen und Anreihverbindungselementen ausgestattet sind, wobei der rechte Stuhl nur teilweise dargestellt ist;
• Fig. 22 die Seitenansicht eines Armlehnenstuhles nach Fig. 21;
• Fig. 23 eine der Fig. 3 entsprechende Draufsicht auf zwei nebeneinander gesetzte Stühle, jedoch mit Armlehnen und ohne Aufbrechung der Sitzfläche;
• Fig. 24 eine Schragansicht eines Stuhles, wie er in den Figuren 4 bis 6 dargestellt ist, schräg von hinten gesehen und mit angesetzten
• Armlehnen;
• Fig. 25 eine Schragansicht des Stuhles mit Armlehnen nach Fig. 24 schräg von vorn gesehen;
• Fig. 26 die Seitenansicht von drei übereinander gestapelten Armlehnenstühlen;
• Fig. 27 die Vorderansicht von drei übereinander gestapelten Stühlen mit angesetzten Armlehnenhaltern und schwenkbaren Schreibplatten;
• Fig. 28 die Seitenansicht der drei übereinander gestapelten Stühle mit schwenkbaren Schreibplatten nach Fig. 27;
• Fig. 29 die perspektivische Ansicht schräg von vorn oben auf vier aneinander gereihte Stühle, wobei die äußeren nur teilweise dargestellt sind;
• Fig. 30 die Teil-Schrägansicht von zwei Stühlen mit Anreihverbindungslementen in der Position kurz vor dem Einhängen;
• Fig. 31 eine der Fig. 30 entsprechende Darstellung von Anreihverbindungselementen an zwei benachbarten Stühlen in etwas anderem Blickwinkel und wobei der rechte Stuhl eine Armlehne und die dieser zugeordnete Anreihverbindung mit Einhängekragenteil aufweist;
• Fig. 32 die Seitenansicht des in Fig. 30 dargestellten Anreihverbindungselementes;
• Fig. 33 die Frontansicht des Anreihverbindungselementes nach Fig. 32;
• Fig. 34 die Draufsicht auf das Anreihverbindungselement nach den Figuren 32 und 33;
• Fig. 35 einen Teil-Vertikalschnitt durch die benachbarten Randbereiche zweier Stühle in der Quermittelebene im Bereich der Schrauben für die Befestigung von Armlehne und Anreihverbindungselementen;
• Fig. 36 einen Vertikalschnitt durch den oberen Bereich einer Armlehne in der Ebene der Schwenkzapfen;
• Fig. 37 eine Teilansicht der Armlehne und einen Teilschnitt längs der Linie 37 - 38 in Fig. 36 durch eine Schwenkarmauflage nach Fig. 36;
• Fig. 38 einen Teilvertikalschnitt längs der Linie 37 - 38 in Fig. 36 mit Stirninnenansicht des Lagerschenkels mit ovaler Lageröffnung, etwa entsprechend Fig. 37, jedoch ohne Armlehnenlagerteile;
• Fig. 39 die Vorderansicht eines Anhebedrehlagerelementes für das Lager der Schwenkarmlehne nach Fig. 38;
• Fig. 40 einen Vertikalschnitt längs der Linie 40 - 40 in Fig. 39;
• Fig. 41 die Draufsicht auf das Anhebe- und Drehlagerelement nach den Fig. 39 und 40.

Show it:

• Figure 1 is a front view of a chair.
• Fig. 2 shows the side view of a chair according to Fig. 1;
• Figure 3 is a plan view of two chairs lined up, the left of which is only partially and with a partially broken open seat.
• Figure 4 shows the oblique view of a chair with the same equipment, but shown more vividly and seen from above slightly above the middle.
• 5 the chair according to FIG. 4 seen from behind, somewhat above the middle;
• 6 shows the chair according to FIGS. 4 and 5 viewed diagonally from above diagonally between the seat and backrest with a somewhat transparent seat made of perforated sheet metal;
• 7 shows the side view of three chairs stacked one above the other, as shown in FIGS. 1 to 3 and corresponding to FIGS. 4 to 6;
• 8 to 11 show the cross sections of two leg profiles, one on top of the other, in four different profile designs, approximately according to line 8-11 in FIG. 13;
• 12 shows the front partial view of two chair legs stacked one on top of the other;
• 13 is a partial side view of two chair legs stacked one on top of the other;
• 14 is a top view of a chair leg end portion;
• 15 is a side view of a slider;
• 16 shows the front view of the slider according to FIG. 15;
• 17 shows the top view of the slider according to FIGS. 15 and 16;
• 18 shows the partial front view of a chair leg with an insertion flap for fastening to the floor;
• Figure 19 is a partial side view of a chair leg with an insertion tab for floor fastening.
• 20 shows the partial top view of the end of the chair leg with an insertion tab for fastening to the floor;
• Fig. 21 is a front view of two side-by-side chairs which correspond to the aforementioned chairs but are equipped with armrests and bay connection elements, the right chair being only partially shown;
• 22 shows the side view of an armrest chair according to FIG. 21;
• 23 shows a plan view corresponding to FIG. 3 of two chairs placed next to one another, but with armrests and without breaking the seat;
• Fig. 24 is an oblique view of a chair, as shown in Figures 4 to 6, seen obliquely from behind and with attached
• Armrests;
• 25 is an oblique view of the chair with armrests according to FIG. 24 seen obliquely from the front;
• 26 shows the side view of three armrest chairs stacked one above the other;
• 27 shows the front view of three chairs stacked one above the other with attached armrest holders and swiveling writing plates;
• FIG. 28 shows the side view of the three chairs stacked one above the other with swiveling writing plates according to FIG. 27;
• 29 shows the perspective view obliquely from the front above on four chairs lined up, the outer ones being only partially shown;
• 30 is the partial oblique view of two chairs with baying connection elements in the position shortly before the hanging;
• FIG. 31 shows a representation corresponding to FIG. 30 of baying connecting elements on two adjacent chairs in a somewhat different perspective, and the right chair has an armrest and the baying connection with hanging collar part assigned to it;
• Fig. 32 is a side view of the bay connector shown in Fig. 30;
• 33 shows the front view of the baying connecting element according to FIG. 32;
• 34 shows the top view of the baying connecting element according to FIGS. 32 and 33;
• 35 shows a partial vertical section through the adjacent edge regions of two chairs in the transverse median plane in the region of the screws for fastening the armrest and bay connecting elements;
• 36 shows a vertical section through the upper region of an armrest in the plane of the pivot pins;
• 37 shows a partial view of the armrest and a partial section along the line 37-38 in FIG. 36 through a swivel arm support according to FIG. 36;
• 38 shows a partial vertical section along the line 37-38 in FIG. 36 with an end view of the bearing leg with an oval bearing opening, approximately corresponding to FIG. 37, but without armrest bearing parts;
• 39 shows the front view of a lifting pivot bearing element for the bearing of the swivel armrest according to FIG. 38;
• 40 shows a vertical section along the line 40-40 in FIG. 39;
• 41 shows the top view of the lifting and rotating bearing element according to FIGS. 39 and 40.

The chair shown in the figures is provided with decimal digits from .1 to 5 to differentiate its design variants. These are omitted from general treatises for the sake of simplicity, since the basic structure of all chairs is the same.

The chair 50 consists of a leg frame 51, a seat 52, a backrest 53 and two connecting and support parts 55.1 and 55.2 arranged symmetrically to the vertical center plane 54 of the chair.

The seat 52 has a seat width 57 and the leg frame has a leg frame outer width 58. As illustrated in FIG. 1, these are almost the same, so that the legs 65 are arranged under the seat 52 and not to the side of the seat as in conventional stacking chairs. The seat 52 is, as can be seen in the plan from FIG. 3, approximately octagonal in shape with sides of unequal length, so that the corner regions 52.1 to 52.4 are cut out or cut off, while the front boundary line 52.5 and the rear boundary line 52.6 are slightly rounded. The side edges 52.7 and 52.8 are straight and parallel to each other. The seat 52 can be designed as a profiled wooden shell or plastic shell, as a padded wooden or plastic shell or as a profiled sheet metal shell or, as can be seen in FIG. 6, as a perforated sheet metal shell.

The connecting and supporting part 55 is best seen in FIG. 5. One is provided on each side. It extends the profile of the seat side edges 52.7 and 52.8 and the boundaries 52.9 of the bevels of the corner areas 52.3 and 52.4 initially with a fold 125 under the seat shell and represents the outer boundary of the seat with its outer edges. In the rear part of the Corner areas 52.3 and 52.4 adjoin the approximately horizontal fastening and seat support leg 55.3 and the seat holding part 55.4 is followed by a transversely projecting transition part 55.5 which merges into the back support leg 55.6, which roughly follows the outer contour of the backrest 53. The backrest 53 is shaped here similar to the layout of the seat 52 and has an octagonal basic shape with uneven sides, parallel outer edges, corner areas cut off at approximately 45 ° and slightly rounded top and bottom edges. It is narrower than the seat 52. The back support leg 55.6 of each connecting and supporting part 55 extends essentially only along the lower corner slope and approximately to the middle of the parallel side edges. Suitable connecting means, such as screws 59, are used to fasten the backrest shell.

The connecting and supporting parts 55 have under their horizontal fastening and seat support legs 55.3 and 55.4 cylinder lugs 55.7, which are arranged slightly inward to the oblique boundary line of the corner recesses 52.1 to 52.4 and have receiving holes for screws 60 for fastening to the leg frame 51 as components of the connecting means . Rivets or locking bolts or the like can also be used here. 3, four fastenings are provided, which are indicated by the crosses 60.1. There are the cylinder lugs 55.7.

The arrangement of the seat 52 and backrest 53, as described above, rests on the leg frame 51. This consists of two flat tube parts which, as illustrated on the left in FIG. 3, each have a horizontal connecting piece 62 running normal to the vertical center plane 54, from which towards the respective corner is angled an angled region 63 in the bend 64, which extends in a straight line under the fastening 60 through to the beveled corner region 52.1 to 52.4. There the leg 65 is angled downward at 66 (FIG. 30). As illustrated in FIG. 1, it has a practically vertical course downward in the front view, while in the side view — as illustrated in FIG. 2 — it is inclined outward at an angle 67 of approximately 12 ° to the vertical. These two flat tube parts are completely identical and bent at the same angles and welded together at 68 in the area of their connecting pieces 62. The flat tubes consist of sheet steel tubes with a special profile. This profiling is designed and arranged in a special way to achieve high stability with good stacking possibility and low stacking height. The major axis 71 lies approximately at 45 ° to the longitudinal axis 54 of the chair.

Some possible and meaningful profile shapes are shown in FIGS. 8 to 11, two adjacent profiles, as they come together when stacking, are shown. The profile of FIG. 8 corresponds to that of the chair representations in the other drawings, while the profiles of FIGS. 9 to 11 represent design variants which are not shown in the other drawings, but whose profile can also be used to design the legs.

8 consists of relatively thin sheet steel of approximately 1.5 mm and has two outer pitch circle or partial cylinder areas 72.1 and 72.2 which represent the thickenings 72 of the dumbbell-shaped flat tube profile 70.1 and which each comprise three quarters of a circle. This is followed by the middle or connecting area, which represents the indentation 73, is approximately quarter-circular, but is designed with a larger radius. The outer radius of the thickenings 72 corresponds to the inner radius of the indentation 73, so that the thickened portion 72 of a leg that is plugged in fits into the indentation 73 of the leg underneath. On the one hand, this interlocking design saves a considerable amount of stacking space, because the inclination of the legs would have a considerable effect on the height by a few millimeters. On the other hand, the legs of chairs stacked one against the other fixed by the interlocking and further fixing means can be dispensed with. In addition, the leg gets a very slim appearance with a very high level of stability and still has the favorable, shell-like reinforcement properties that otherwise usually have round tubes. In addition, there is a flat profile, on which a support for the attachment of seat 52 or connecting and supporting part 55 can be made cheaply. Openings can also be made well. The profile is also favorable for the deformation in the corners 64 and 66 when bending, but offers good stability properties after the deformation. If the flat tube profile 70.1 is bent and rolled from sheet metal and welded together, it is expedient to weld it in the indentation 73 at 74 by means of a longitudinal seam. The distance between the center of the circle 75 of the two thickenings is expediently 21 mm, while the outer radius of the thickening and the inner radius of the indentation are approximately 8 mm. Such a profile can be produced endlessly, simply cut off and well bent and welded in order to economically create the leg frame 51.

9 shows an interesting embodiment variant in which the outer boundary of the flat tube profile 70.2 is formed by straight side walls 82 by two hexagons, the coinciding connecting wall not being present. The result is a double hexagon, which, as can be seen, can also be stacked cheaply and has similar dimensions. This can also be welded in the area of the indentation bend 83.

The flat tube profile 70.3 according to FIG. 10 is also designed with thickenings and indentations, namely namely that two squares directly adjoin one another and their side walls 86.1 and 86.2 lying in the region of the indentation 85 are each directly connected either by bending or welding. These profiles also interlock very well and with a small distance between their axes.

11 illustrates a further profile 70.4, the thickenings 87 being formed by equilateral octagons, the mutually facing walls of which are omitted and which are connected in one piece with connecting walls 88 of equal length in the region of the indentation 89 and can be welded to one another at a suitable internal point. Here, too, there is good interlocking, despite the relatively short distance and good mutual locking. All the profiles discussed above have approximately the shape of dumbbells in the plan, which is why this term was used in the main claim. You can also design the entire tube as a double rifle barrel design if you do not focus on the profile, but on the tube piece. Other similar designs are possible. It is essential that external thickening areas and internal indentations interlock and that a stable profile is present, which is closed at least in large partial areas, which can preferably be tubular, but also partially or completely solid.

The lower end of each leg 65 of the leg frame 51 made of the dumbbell-shaped flat tube profile 70 is to be closed off with a slider 90 in order to ensure damage-free support of the tube end on any floor in question. Such sliders are usually made of plastic by injection molding and provided with insertion pins for the pipe end. In the present case, a special design has been chosen which serves several purposes and which is adapted to the stackable flat tube profile 70.

The slider 90 has a connection and support plate 91, the base and contact surface 92 of which is inclined to the pipe end surface 65.2, which is normal to the pipe axis 65.1, in accordance with the inclination of the legs 65 at angles of 7 ° to 12 °, as can be seen from the figures . At the spacing of the thickenings 72, semicylindrical insertion pins 93 are provided so as to protrude. These are inserted into the pipe end. In this respect, the construction is common, except for the adaptation to the pipe profile. The connecting plate and support plate 91 serving as the base plate is widened on the outside via the indentation 73 of the tubular profile 70 approximately triangularly at 94 and here carries a stacking support pin 95 which fits to the profile of the dumbbell-shaped flat tube 70 of the leg 65 and adapts to it with formation fits an internal recess 95.1. It ends at the top in a correspondingly inclined stacking support surface 96, which is also inclined according to the lower inclination, so that the feet can be supported on it when stacking, as can be seen from FIGS. 12 and 13. The distance 96.1 of the lower base and support surface 92 from the stacking support surface 96 is approximately 90 mm, which corresponds to the low stacking height of the chairs. The stacking support pin is located in a tube area in which it does not interfere with taste or use. However, it lies with sufficient wall thickness in the support area of stacked feet. Since it is of relatively long design, it could tend to pivot out when the material is not sufficiently stable or the insertion pins 93 are too short. For this reason, it has a profile-matching inner region on its head 97, on which a latching hook 98 with a latching lug 98.1 is formed. At a corresponding point, a correspondingly large and shaped recess is punched out in the tubular profile, into which the latching hook 98 with its latching lug 98.1 can be snapped into place. The inserted slider 90 is not only properly secured against being pulled out, but also against tipping sideways. In its lower region, the slider 90 has an insertion recess 99 into which a twice angled insertion tab 100 can be inserted and screwed through the tab hole 101 with the aid of a screw 102 into a dowel 103 in the floor, if this is desired. Because of the relatively wide and sufficiently thick design of the foot of the slider 90, there is sufficient space to provide such an insertion flap 100 which is also secured against lateral pulling out.

The chair described above can, if necessary, be equipped with armrests and / or bay connecting elements.

In Figures 21 u. 29-35 illustrate how chairs 50 can be connected together by baying connectors 110. For this purpose, on the one hand, a basic connection element 110 similar to the previous elements of this type, but somewhat more specifically designed, is provided, which is particularly evident from the perspective representations. It has a base body 111 with a contact surface 112, which is adapted to the outer profile of the seat or the connecting and supporting part 55, and has in the middle a screw hole 113 through which it is connected to the connecting and supporting part 55 with a single screw 114 is screwed tight.

The connecting and supporting part 55 has in its edge region a fastening profile with a supporting part 55.8 which is roof-shaped in cross section, the outer surface 55.82 of which is angled and merges into a fixing surface 55.83, to which a vertical leg 55.9 is connected, in which a bore 108 for receiving the screw 114 is also included a profile-fitting recess for a nut 109 is provided. This angled arrangement of the surface 55.83 and the vertical leg 55.9 is followed by the outer contour of the base body 111 of the bay connection element 110. As can be seen from FIGS. 32 and 35, the contact surface 112 of the bay connection element 110 is mirror image or rotationally symmetrical to the screw hole 113, that is to say on both sides beveled in accordance with the angle of the fixing surface 55.83, so that the bay connection element 110 can be mounted on the envelope, that is to say once with the tips of the flat pins 115 upwards and on the other side with the tips of the flat pins downward. The bore 108 for the screw 114 is arranged in an approximately square-prismatic thickening part 55.91 of the vertical leg 55.9, while the rest of this has a smaller wall thickness. This thickening part 55.91 serves as an eye and has a width of approximately 16 mm. In the appropriate distance, two pins 112.1 are formed as an assembly aid and anti-rotation aid on the bay connecting element 110, which lie next to the thickening part 55.91 of the vertical leg 55.9.

Two flat pins 115 are formed on the bay connecting element, forming a slot 119 in the manner of a U-shaped profile, which leave a V-shaped recess 116 between them with a rounded base 116.1. They are connected to the base body 111 via a base region 117 and small transverse walls 118, so that there is good stability for the flat pins even with a relatively small wall thickness. In the bottom area 117, two suitably arranged and dimensioned recesses 117.1 are provided, into which the flat pin tips 115.1 can enter if the baying connection is made with two identical baying connection elements mounted in opposite directions. In this respect, it is a type of bay connection that is known from the basic principle, but not from the structural design. However, this is now further developed to be able to mount an armrest 130 without loss of distance and to provide a further simple baying element. This can be seen particularly clearly from FIGS. 31 and 35. A longer screw 114.1 is guided below through the clamping leg 131 of the armrest 130 through the central bore 131.1, the head of which is seated in a suspension collar part 120, which consists of the collar 120.1 and the neck part 120.2 or a washer and a spacer tube, and so on Extends and is dimensioned beyond the outer surface 132.1 so that, as can be seen from the figures, the neck 120.2 can engage in the rounded V-recess 116 of an adjacent chair, while the collar 120.1 in the slot 119 between the base body 111 and the flat pin 115 of the bay connection element 110 engages, as can be clearly seen in FIG. 35. The attachment can take place either from above or from below, depending on how the row connecting element 110 is mounted. Since chairs are usually provided with armrests on both sides and are then alternately connected to chairs without armrests when attached, the chairs with armrests also carry the hanging collar parts 120 on both sides and can be arranged because of the symmetrical and foldable and otherwise adapted arrangement of the Hinged connecting part 110 can be connected to each armrest-free chair. All that is required is a longer screw and the simple hook-in collar part on the armrest chair. This is in the rest in a recess 132 of the armrest 130 of sufficient size so that the engagement with the flat pin 115 can be made properly, but on the other hand, the hanging collar part does not protrude beyond the outer edge 133 of the armrest 130.

The armrest attachment is otherwise designed as described below. The Armrest 130 can be attached to the chair 50 described above either at any time during manufacture or later. The armrest 130 has a fastening part 135, the clamping leg 131 and trough 132 have already been mentioned. Raised from the fastening side 135 are approximately V-shaped, upwardly striving support arms 136, on which a pivotable armrest 138 is mounted with the aid of pivot bearings 137. The pivotability is necessary for stacking and to enable the arrangement in the middle above the outer edge 90.1 of the seat and is dealt with below. As can be seen from the side views of the chairs, in particular FIG. 2, the fastening part 135 has a certain width dimension 139 of approximately at least 90 mm, so that a secure and wobble-free fastening is possible with the single screw 114.1. The fastening part 135 has, as can be seen in FIG. 35, an overlapping profile 141 which is adapted to the roof-shaped profile of the supporting part 55.8 and has two overlapping lugs 142 spaced apart from one another or a longer overlapping profile. The outer roof surface 55.82 is arranged at 90 ° to the inner roof surface 55.81 and merges into a fixing surface 55.83, which is inclined by approximately 15 ° to the inner roof surface 55.81, so that a wedge results and the overlap profile 141 fits snugly can be pushed on and when tightening the screw 114.1, which protrudes through the clamping leg 131, is held firmly and permanently in place. The connection and support part 55 has a seat support fold 125 on the inside, on which the seat shell is placed and fastened with suitable screws or the like. Due to the roof-shaped profile with rounded edges, the profile design for the seat limitation is also favorable for normal use without connecting an armrest, because it forms a stable edge protection and still does not hinder when sitting, especially since the seat is especially designed because of the special design of the entire chair this area can be made very broad. However, the profile is also designed so cheap that if it is manufactured in the aluminum die casting process or another suitable process, an armrest which has not been processed further can be attached and fastened with a single screw even with the formation of a baying connection.

FIGS. 27 and 28 show stacking chairs with row connections and, instead of an armrest, a pivotable writing plate 170. In this chair 50.5, a fastening part 135 with V-shaped support arms 136 is provided only on the right side. At the upper ends 136.3 joint elements 171 with pivot axes 172 and stops for the writing plate 170 are attached. The writing plates and their swivel mounting are designed in the usual way, but they are equipped with the inventive design of the attachment, as described for the armrests. As illustrated in FIG. 27, these writing plates 170 are also mounted in such a way that the chairs can be stacked. The stops for the writing plate are designed accordingly and the fastening elements 135 and the support arms 136 engage in the same way. Such chairs, when strung together, are strung together in the same form, each with a writing surface, or can also be strung together with an armrest chair and then an armrest-free chair. For this purpose, they have a bay connection element 110 with a flat pin 115 on the side that is not equipped with a pivotable writing surface, here the left side of the chair, if this is desired.

Stacking chairs, which should have armrests, as described and shown with the stacking chairs 50, expediently have an armrest exactly above the outer edge 90.1 of the foot, so that the armrest 138 lies exactly between two chairs when they are lined up and can be used optionally. An armrest must have a certain width so that it can be used to comfortably support the arms. However, it is then in the way when stacking. Thus, the armrests can also be designed to be stackable one inside the other, which is why their upwardly projecting support arms 136 are arranged in a V-shape, so that the fastening parts 135 lie between the support arms 136 of the respective lower chair.

The support arms 136.1 and 136.2 have attached bearing ends 150.1 and 150.2 which run parallel to one another at the top. These are designed with outward-facing journals 151.1 and 151.2 and, moreover, have a head design, which can be seen in the drawings, with stop faces 152.1 and 152.2 for the horizontal position and the vertical position and with a corner rounding 153 and are otherwise designed such that a base shape U- shaped or one-sided open box-shaped swivel armrest 138 it can overlap.

The pivotable armrest 138 is ribbed on the inside and is box-shaped with slightly elastic bearing legs 155. The bearing leg 155.2 has only one bearing recess 156, which corresponds to the size of the bearing journal 151.2. The end wall 157, designed to be comfortable to hold, is separated from the bearing leg 155 by a gap 158 for the elastic deformation thereof. The ribbing, wall thickness and other design of the pivotable armrest, which is made of a suitable plastic, is to be selected so that the bearing legs 155 can be pushed over the bearing journal 151.

At one end of the bearing 150.1 above is further a locking lug 161 is formed, which is assigned a locking recess 162 in the pivotable armrest 138, which is delimited by a locking rib 163. As can be seen from FIGS. 36 to 38, the bearing leg 155.1 is designed with a long recess 164. In this lies a highly elastic plastic part, which is designed as a lifting and pivoting bearing element 165 and is designed, for example, from a silicone rubber of approximately 50 ° shore, as can be seen from the drawings. The lifting and pivoting bearing element 165 has a bearing recess 166, in which the bearing pin 151.1 rotatably engages and which is offset upwards relative to the center, so that a lower compressible part 165.1 results. Due to the overall elastic design of the bearing limbs 155 and the further highly elastic design of the lifting and pivoting bearing element 165, which fits into the slot recess 164, assembly is facilitated on the one hand and, on the other hand, a latching is made possible with the aid of the latching lug 161 and the latching recess 162, specifically in the way that the swivel arm support 138 is raised in this end region. The lower part 165.1 of the lifting and pivoting element is then compressed so much that the bearing pin 151.1 can move by the height of the locking recess 162 relative to the swivel arm support 138, so that the locking connection is now released and the armrest is pivoted into the vertical position shown in broken lines can be where it lies outside the support arms 136, because the axis of rotation as shown in the drawings is also arranged outside the support arms and the rest of the design is also made accordingly. Now, as can be seen from FIG. 26, another chair 50.4 with armrest 130 can be stacked over the respective lower chair with armrest, because the armrests 138 are removed from the areas of the armrest attachments and these separate between the pivoted armrests and the V-shaped parts Support arms can be inserted.

Reference symbol list

• 50.1 - Design variants
• 50.5 of the chair
• 51 leg frame
• 52 seat
• 52.1 - recessed
• 52.4 Corner areas
• 52.5 front boundary line
• 52.6 rear boundary line
• 52.7 margin
• 52.8 margin
• 52.9 limitation
• 53 backrest
• 54 Vertical median plane of the chair
• 55 Connection and support part
• 55.1 Connection and support part
• 55.2 Connection and support part
• 55.3 Attachment and seat support legs
• 55.4 Seat holding part
• 55.5 transition section
• 55.6 Back support leg
• 55.7 Cylinder lugs
• 55.8 Support part
• 55.81 interior roof area
• 55.82 exterior roof area
• 55.83 fixing surface
• 55.9 Vertical leg
• 55.91 thickening part
• 57 seat width
• 58 Outer frame width
• 59 screw
• 60 lanyards
• 60.1 cross
• 62 connector
• 63 Angular range
• 64 bend
• 65 leg
• 65.1 Pipe axis
• 65.2 Pipe end surface
• 66 corner
• 67 angles
• 68 welding point
• 70 flat tube profile
• 70.1- flat tube profile
• 70.4
• 71 major axis
• 72 thickening
• 72.1- pitch circle or
• 72.2 Cylinder area
• 73 indentation
• 74 Point where flat tube profile is welded by longitudinal seam
• 75 center of circle
• 76 distance
• 77 radius
• 82 side wall
• 83 indentation kink
• 85 indentation
• 86.1 side wall
• 86.2 side wall
• 87 thickening
• 88 connecting wall
• 89 indentation
• 90 gliders
• 90.1 outer edge of foot
• 91 Connection and support plate
• 92 base and footprint
• 93 insertion pins
• 94 Place where the connection and support plate is widened in a triangular shape
• 95 stacking spigots
• 95.1 Internal recess
• 96 stack support surface
• 97 head
• 98 locking hooks
• 98.1 latch
• 99 insertion recess
• 100 insert tab
• 101 tab hole
• 102 screw
• 103 dowels
• 108 hole
• 109 mother
• 110 baying connectors
• 111 basic body
• 112 contact surface
• 113 screw hole
• 114 screw
• 114.1 longer screw
• 115 flat pins
• 115.1 Flat cone tip
• 116 V-shaped recess
• 116.1 rounded reason
• 117 floor area
• 117.1 recess
• 118 small transverse wall
• 119 slot
• 120 hanging collar part
• 120.1 collar
• 120.2 neck
• 125 seat cushion fold
• 130 armrest
• 131 clamping legs
• 131.1 Hole
• 132 trough
• 132.2 outer surface
• 133 outer edge
• 135 fastening part
• 136 support arms
• 136.1 support arms
• 136.2 Support arms
• 136.3 upper end
• 137 pivot bearings
• 138 swiveling armrest
• 139 latitude
• 141 Cross profile
• 142 overlap
• 150.1 End of camp
• 151 bearing journal
• 151.1 Journal
• 151.2 Journal
• 155 bearing legs
• 155.1 bearing arm
• 155.2 Bearing legs
• 161 latch
• 162 recess
• 163 snap-in ribbing
• 164 slot recess
• 165 lifting and pivoting element
• 166 bearing recess
• 170 writing surface
• 171 joint elements
• 172 swivel axis

Claims (18)

1. A chair (50.1 - 50.5) with at least a leg frame (51), seat (52) and back (53), wherein the legs (65) are inclined for stacking and the seat (52) and back (53) are secured by connecting means to the leg frame (51), the seat width (57) corresponds approximately to the leg frame external width (58), the seat (52) ist cut away at the corner regions (52.1, 52.2, 52.3, 52.4) in a manner corresponding to the position and size of the legs (65) and the legs (65), which lie in the corner regions (52.1, 52.2, 52.3, 52.4) of the seat (52) and which are attached below the said seat and extend almost parallel to the vertical central plane (54), consist of metal profile and, in order to be stackable, have recesses in their external faces, such that, when stacked, the upper leg engages in the lower leg, characterised in that the metal profile of the slender legs (65) has a dumb-bell-shaped cross-section (Fig. 8-11), such that when the chairs are stacked, the thickening (72) of the dumb-bell-shaped cross-section of the upper leg (65) engages in the recess (73) of the dumb-bell-shaped cross-section of the lower leg (65).

2. A chair (50.1 - 50.5) having at least a leg frame (51), seat (52) and back (53), wherein the seat (52) and back (53) are secured with connecting means to the leg frame (51), the legs (65) are inclined for stacking, and, in the case of stacking, the respective upper leg engages over the lower leg, and the seat width (57) corresponds approximately to the leg frame width (58), the seat (52) is cut away at the corner regions (52.1, 52.2, 52.3, 52.4) in a manner corresponding to the position and size of the legs (65), and the legs (65), which lie in the corner regions (52.1, 52.2, 52.3, 52.4) of the seat (52) and which are attached below the said seat and extend almost parallel to the vertical central plane (54), consist of metal profile, characterised in that the connecting means are formed of two retaining connecting and supporting members (55) made of die-cast aluminium and fixed individually to the leg frame (51) and supporting the seat (52) and back (53), the said connecting and support members having integrally formed- on cylindrical projections (55.7), by means of which the said connecting and support members are secured, preferably by screws, to the leg frame (51) and which are shaped on both sides of the chair (50) in such a manner that in each case a securing and seat supporting flange (55.3) extends approximately horizontally below the edges of the seat (52), which flange has in the centre region of the side edges (52.7, 52.8) fixing means for row-forming connecting elements (110, 120) and/or arm rests (130) or writing panels (170), the flange adjoining in each case a transision member (55.5), which passes over into a respective back supporting flange (55.6) having fixing means (59) for the chair back (53), the metal profile of the leg frame (51) being a profiled flat tube for achieving greater stability together with good stackability.

3. A chair according to claim 1 and/or 2, characterised in that the leg frame (51) consists of two flat tubular members, each having two downwardly inclined legs (65) and under the seat (52) a connecting member (62, 63) optionally bent in more than one place, both flat tubular members being connected together under the seat and carrying the connecting means for the seat (52) and chair back (53).

4. A chair according to claim 3, characterised in that the two leg frame members (51) in the region of connecting members (62) extending in parallel are welded together and each has a bend (63, 64) on one side in the direction of the corner (52.1 52.4) of the seat (52) and a bend (66) of the leg.

5. A chair according to claims 1 and optionally 3 or 4, characterised in that the dumb-bell-shaped metal profile, in particular flat tubular profile (70.1) of the legs (65) is composed of partial circles (Fig. 8).

6. A chair according to one of claims 1 and optionally 3 or 4, characterised in that the dumb-bell-shaped metal profile (70.3), in particular flat tubular profile, is formed of two rectangles with their points facing one another (Fig. 10).

7. A chair according to one of claims 1 and optionally 3 or 4 characterised in that the dumb-bell-shaped metal profile (70.2, 70.4), in particular flat tubular profile, is formed of two directly abutting hexagons (Fig. 9) or octagons with suitable connecting webs (Fig. 11).

8. A chair according to at least one of the preceding claims, characterised in that the legs (65) have gliders (90) corresponding to the shape of the stackable profile (70), the gliders having a profile-fitting stack support pin (95) extending to a stack support face (96) and integrally formed on the lower connecting and support panel (91) of the glider (90).

9. A chair according to claim 8, characterised in that plug-in pins (93) and/or stack support pins (95) of the glider (90) have locating hooks (98) which engage in recesses made in the profile (70) of the leg (65).

10. A chair according to claim 8 or 9, characterised in that a plug-in bracket (100), which may be screwed to the floor is provided on the glider (90).

11. A chair according to at least one of the preceding claims, characterised in that the connecting means (60) between the leg frame (51) and the seat (52) are formed as screws, rivets or locating pins disposed slightly inside the limits (52.9) of the oblique corner regions (52.1 - 52.4).

12. A chair according to claim 2, characterised in that the connecting and supporting member (55) or the leg frame (51) in the region of the centre of the side edges (52.7, 52.8) of the seat (52) has a fixing profile for overlapping, the fixing profile having a supporting member (55.8), which is roof-shaped in cross-section, preferably next to a seat supporting angle (125), the outer face (55.82) of the said supporting member passing over into a fixing face (55.83) extending approximately 100° to 105° with respect to the oblique outer face (55.82) and passing into a vertical flange (55.9).

13. A chair according to claim 12, characterised in that a detachably secured arm rest (130) or writing panel (170) is provided, the lower region thereof having an overlap profile (141) corresponding to the fixing profile and having a sufficient supporting width (139), a bore (131.1) being provided centrally, through which a single screw (114.1) engages to clamp the whole arm rest (130) or the mounting of the writing panel (170) to the supporting member (55.8).

14. A chair according to at least one of the preceding claims, characterised in that a row-forming connection with a row-forming connection element (110) is provided, consisting of a profile member of metal or plastics in the centre region of the side of the chair (50), the profile member having two spaced flat pins (115) on a base body (111), between which a V-shaped recess (116) with a rounded base (116.1) is formed, the base area (117) being preferably equipped with recesses (117.1) for the flat pin points (115.1) of the adjacent row-forming connecting element (110).

15. A chair according to claim 14, characterised in that a suspension collar member (120) is associated with the row-forming connecting element (110) when the arm rest (130) is mounted, the fixing screw (114.1) of the arm rest (130) extending through the said member in such a manner that a collar (120.1) projects by the thickness of the flat pin (115) beyond the outer face (132.1) of the securing member (135) of the arm rest (130) in such a manner that the suspension collar member (120) is suspendable from above or below in the rounded V-shaped recess (116) of the adjacent chair (50).

16. A chair according to at least one of claims 13 - 15, characterised in that the centre of the arm rest (130) or arm support (138) lies above the foot outer edge (90.1).

17. A chair according to at least one of claims 13 - 16, characterised in that the arm rest (130) has supporting arms (136) projecting upwards from the securing member (135) and passing into rotary bearings (137) for a pivotable arm support (138).

18. A chair according to claim 17, characterised in that the rotary bearings (137) for the pivotable arm support (138) have outwardly projecting bearing pins (151.1, 151.2), on which the depressions (156, 166) for receiving a plastics pivotable arm support (138), which is sufficiently elastic for assembly and yet sufficiently rigid for use, rest, and limit faces (152.1, 152.2) for the horizontal position and the vertical position are associated with the said bearing pins, and an engaging connection (160, 162, 163) is provided in the region of one end of the arm support (138) and is associated with an elastic lifting bearing in such a manner that the pivotable arm support (138) has an elongate slot recess (164) lying vertical in the horizontal position, in which slot a highly elastic plastics lifting and rotating bearing element (165) is mounted, the said bearing element having a bearing bore (166) for the bearing pin (151.1) slightly displaced upwards with respect to the centre in such a manner that the slightly larger lower portion (165.1) of the lifting and rotating bearing element (165) is deformable for disengaging and the arm support (138) is subsequently liftable.

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