NO314743B1

NO314743B1 - Foldable chair

Info

Publication number: NO314743B1
Application number: NO20014598A
Authority: NO
Inventors: Asbjoern Enge
Original assignee: Asbjoern Enge
Priority date: 2001-09-21
Filing date: 2001-09-21
Publication date: 2003-05-19
Also published as: NO20014598D0; WO2003028509A1; US20040232740A1; NO20014598L

Description

Den foreliggende oppfinnelse vedrører stoler. Nærmere bestemt vedrører oppfinnelsen en sammenfoldbar stol ifølge innledningen til det selvstendige krav 1. The present invention relates to chairs. More specifically, the invention relates to a foldable chair according to the introduction to the independent claim 1.

En rekke sammenfoldbare stoler er kjent. A number of folding chairs are known.

U.S. 4,685,725 beskriver en sammenfoldbar stol med trekk og stenger. Trekket er nødvendig for å holde stolen i en oppslått tilstand. U.S. 4,685,725 describes a folding chair with covers and poles. The cover is necessary to keep the chair in a folded state.

U.S. 4,836,601 beskriver en sammenfoldbar stol med stenger og trekk. U.S. 4,836,601 describes a folding chair with rods and covers.

U.S. 5,320,404 viser en sammenfoldbar stol av lette stenger og trekk som spennes over de bærende stengene. U.S. 5,320,404 shows a collapsible chair of light rods and covers which span the supporting rods.

G.B. 2,308,974 beskriver et system av stenger som kan kombineres på en rekke ulike måter for å danne bl.a. en sitteanordning. GB 2,308,974 describes a system of rods that can be combined in a number of different ways to form, e.g. a seating arrangement.

U.S. 3,123,395 vedrører en sammenfoldbar stol med fire U-formede ben, der hver av benenes sidestenger er dreibart sammenkoplet ved bolter i stolens respektive sider. Stolen har et lerretstrekk som er i øvre og nedre del er opphengt i tverrgående staver, og stropper holder de U-formede bena sammen i en oppslått stilling. U.S. 3,123,395 relates to a folding chair with four U-shaped legs, where each of the leg's side rods is rotatably connected by bolts in the respective sides of the chair. The chair has a canvas cover which in the upper and lower part is suspended from transverse rods, and straps hold the U-shaped legs together in a folded position.

Ulempen ved de fleste sammenfoldbare stoler er imidlertid at de selv i sammenfoldet tilstand er forholdsvis omfangsrike og dermed lite egnet for transport i f.eks. en ryggsekk eller på en sykkel. De sammenfoldbare stoler som i sammenfoldet tilstand er temmelig kompakte, er i oppslått tilstand ustøe og/eller lite behagelige å sitte på. Videre er konstruksjonene i mange tilfeller unødvendige kompliserte og svært utsatt for slitasje og brudd. However, the disadvantage of most folding chairs is that even when folded they are relatively bulky and thus not suitable for transport in e.g. a backpack or on a bicycle. The folding chairs, which are quite compact when folded, are unstable and/or uncomfortable to sit on when unfolded. Furthermore, the constructions are in many cases unnecessarily complicated and very prone to wear and tear.

Det er således et behov for en sammenfoldbar stol av den overfor beskrevne typen, og som angitt i innledningen til det medfølgende krav 1. Den sammenfoldbare stolen ifølge oppfinnelsen innbefatter et rammeverk, en duk og feste- og strammeanordninger, og innbefatter videre There is thus a need for a foldable chair of the type described above, and as stated in the introduction to the accompanying claim 1. The foldable chair according to the invention includes a framework, a cloth and fastening and tightening devices, and further includes

en seteramme med to hovedsakelig parallelle sete-sidestaver, svingbart sammenkoplet ved sine respektive første, ytre ender til motsatte respektive ender av en hovedsakelig tverrgående sete-tverrstav ved hjelp av respektive svingbare hjørneledd, hvilke nevnte sete-sidestaver ved sine respektive andre, indre ender a seat frame with two substantially parallel seat side bars, pivotally coupled at their respective first outer ends to opposite respective ends of a substantially transverse seat cross bar by means of respective pivotable corner joints, said seat side bars at their respective second inner ends

er svingbart forbundet med respektive sete- eller kombinerte ledd; • en ryggramme innbefattende to hovedsakelig parallelle rygg-sidestaver, svingbart sammenkoplet ved sine respektive første, øvre ender til motsatte respektive ender av en hovedsakelig tverrgående rygg-tverrstav ved hjelp av respektive svingbare hjørneledd; • en fremre benkonstruksjon innbefattende to hovedsakelig parallelle fremre ben-sidestaver, svingbart sammenkoplet ved sine respektive første, nedre ender til motsatte respektive ender av en hovedsakelig tverrgående fremre ben-tverrstav ved hjelp av respektive svingbare hjørneledd; • en bakre benkonstruksjon innbefattende to hovedsakelig parallelle bakre ben-sidestaver, svingbart sammenkoplet ved sine respektive første, nedre ender til motsatte respektive ender av en hovedsakelig tverrgående bakre ben-tverrstav ved hjelp av respektive svingbare hjørneledd, hvilke nevnte bakre ben-sidestaver ved sine respektive andre, øvre ender er svingbart forbundet med nevnte are pivotally connected to respective seat or combined joints; • a back frame including two substantially parallel back side bars pivotally connected at their respective first upper ends to opposite respective ends of a substantially transverse back cross bar by means of respective pivotable corner joints; • a front leg structure including two substantially parallel front leg side bars, pivotally coupled at their respective first lower ends to opposite respective ends of a substantially transverse front leg cross bar by means of respective pivotable corner joints; • a rear leg structure comprising two substantially parallel rear leg side bars, pivotally coupled at their respective first, lower ends to opposite respective ends of a substantially transverse rear leg cross bar by means of respective pivotable corner joints, said rear leg side bars at their respective other, upper ends are pivotally connected to said

respektive sete- eller kombinerte ledd, respective seat or combined joints,

der stolen innbefatter strekkopptagende elementer som strekker seg rundt stolens rammeverk og fortrinnsvis løper over de nevnte hovedsakelige tverrgående staver for derved å holde stolen i en oppslått stilling. where the chair includes strain-absorbing elements that extend around the chair's framework and preferably run over the aforementioned main transverse rods to thereby hold the chair in an unfolded position.

Den sammenleggbare stolen ifølge oppfinnelsen er kjennetegnet ved at: The folding chair according to the invention is characterized by:

• nevnte sete-sidestaver er teleskopiske og innrettet slik at nevnte sete-tverrstav er bevegbar; • nevnte hjørneledd innbefatter et forskjøvet hjørneledd med et omdreiningspunkt som er tilbaketrukket med en avstand i forhold til et annet hjørneledds omdreiningspunkt, og • nevnte seteramme, ryggramme, fremre- og bakre benkonstruksjoner alle er svingbart sammenkoplet med hovedsakelig tverrgående staver ved hjelp av svingbare ledd. • said seat side bars are telescopic and arranged so that said seat cross bar is movable; • said corner joint includes an offset corner joint with a pivot point which is set back by a distance in relation to another corner joint's pivot point, and • said seat frame, back frame, front and rear leg structures are all pivotally connected with mainly transverse rods by means of pivot joints.

Foretrukne trekk ved stolen ifølge oppfinnelsen fremgår av de uselvstendige krav 2 til 14. Preferred features of the chair according to the invention appear from the independent claims 2 to 14.

Utførelsesformer av oppfinnelsen fremgår av de vedlagte patentkrav, samt av den følgende beskrivelse under henvisning til de vedlagte tegninger. Det skal forstås at tegningene kun er typiske utførelseseksempler, uten at de dermed skal oppfattes å begrense oppfinnelsen. I tegningene er like deler angitt med samme henvisningstall, som også vil bli benyttet i det etterfølgende. Fig. la er et perspektivriss av en utførelsesform av stolen ifølge oppfinnelsen, og viser stolen i en oppslått tilstand. Stroppene er markert med en gråtone, av illustrative hensyn. Embodiments of the invention appear from the attached patent claims, as well as from the following description with reference to the attached drawings. It should be understood that the drawings are only typical examples of execution, without them being understood as limiting the invention. In the drawings, similar parts are indicated with the same reference number, which will also be used in what follows. Fig. la is a perspective view of an embodiment of the chair according to the invention, and shows the chair in an unfolded state. The straps are marked with a gray tone, for illustrative purposes.

Fig. lb er et annet perspektivriss av stolen vist i fig. la. Fig. 1b is another perspective view of the chair shown in Fig. let.

Fig. lc er nok et perspektivriss av stolen vist i fig. la og fig. lb. Fig. 1c is another perspective view of the chair shown in fig. 1a and fig. lb.

Fig. 2 er et perspektivriss av stolen vist i fig. la - c, men vist uten duk og stropper av illustrative hensyn. Fig. 3a er et sideriss av stolen vist i fig. la - c og fig. 2, og viser spesielt kombinasjonsleddet. Fig. 3b er et sideriss av en annen utførelsesform av stolen ifølge oppfinnelsen, der setet er plassert lavere og ryggen dermed er lengre enn i den utførelsesformen vist i fig. 3a, og viser spesielt seteleddet og ryggleddet. Fig. 4a - 4d viser perspektivriss av rammeverket i stolen ifølge oppfinnelsen (uten duk og stropper av illustrative hensyn) i ulike tilstander. Fig. 4a viser rammen (stolen) i oppslått tilstand, fig. 4b og 4c viser mellomstadier, fig 4d viser rammen i sammenfoldet tilstand. Pilene A-F indikerer sammenfoldingssekvensen. Fig. 5a og 5b viser et perspektivriss av stolen ifølge oppfinnelsen, der rammen er i en sammenfoldet tilstand (jf- fig. 4d), og viser også duken og stroppene. Fig. 5b viser stolen ifølge oppfinnelsen i sin mest kompakte form. Fig. 6 er et perspektivriss av en utførelsesform av stolen ifølge oppfinnelsen (uten duk og stropper av illustrative hensyn) i en delvis sammenfoldet tilstand. Fig. 7a - 7c er hhv. grunnriss, sideriss og oppriss av rammen i en sammenfoldet tilstand. Fig. 7d viser grunnriss av de teleskopiske setestavene i utstrukkede og innfelte tilstander. Fig. 8a - 8c er ulike riss av det kombinerte leddet og viser de enkelte komponentene. Fig. 9 er et sideriss av det kombinerte leddet samt deler av de tilkoplede rammestaver, og viser leddet i en stilling der rammen er i en oppslått stilling Fig. 2 is a perspective view of the chair shown in fig. la - c, but shown without cloth and straps for illustrative purposes. Fig. 3a is a side view of the chair shown in fig. 1a - c and fig. 2, and shows in particular the combination link. Fig. 3b is a side view of another embodiment of the chair according to the invention, where the seat is placed lower and the back is thus longer than in the embodiment shown in fig. 3a, and shows in particular the seat joint and the back joint. Fig. 4a - 4d show perspective views of the framework in the chair according to the invention (without cloth and straps for illustrative purposes) in various states. Fig. 4a shows the frame (chair) in the unfolded state, fig. 4b and 4c show intermediate stages, fig 4d shows the frame in a folded state. Arrows A-F indicate the folding sequence. Fig. 5a and 5b show a perspective view of the chair according to the invention, where the frame is in a folded state (cf. Fig. 4d), and also show the cloth and the straps. Fig. 5b shows the chair according to the invention in its most compact form. Fig. 6 is a perspective view of an embodiment of the chair according to the invention (without cloth and straps for illustrative purposes) in a partially folded state. Fig. 7a - 7c are respectively ground plan, side view and elevation of the frame in a folded state. Fig. 7d shows a plan view of the telescopic seatposts in extended and retracted states. Fig. 8a - 8c are different views of the combined joint and show the individual components. Fig. 9 is a side view of the combined joint and parts of the connected frame rods, and shows the joint in a position where the frame is in an open position

Følgende deler er identifisert i figurene og den følgende beskrivelsen: The following parts are identified in the figures and the following description:

Den sammenfoldbare stolen ifølge oppfinnelsen er meget kompakt og har i sammenfoldet tilstand en praktisk, sylindrisk form. I denne tilstanden tilsvarer den totale lengden setets bredde. The foldable chair according to the invention is very compact and, when folded, has a practical, cylindrical shape. In this condition, the total length corresponds to the width of the seat.

Konstruksjonen består av stenger eller staver (rør), ledd og opplagringer, teleskopiske sete-sidestaver (121a, 121b), stropper (430,440), en strammelås eller spenne (435) for stropp, og et materiale (400), f.eks. duk eller nett, utformet som et sete eller "sittepose". Sitteposen er festet (tredd innpå) to horisontale staver (110,120) hvor det ene er i fremkant av setet og det andre er øverst i ryggen. Disse to horisontale stavene holdes i posisjon av et system med staver i vertikal- og horisontalplanet sammen med stroppene. The construction consists of rods or rods (tubes), joints and bearings, telescopic seat side rods (121a, 121b), straps (430,440), a tension lock or buckle (435) for strap, and a material (400), e.g. canvas or netting, designed as a seat or "seat bag". The seat bag has attached (threaded in) two horizontal rods (110,120), one of which is at the front of the seat and the other at the top of the back. These two horizontal rods are held in position by a system of rods in the vertical and horizontal planes together with the straps.

Konstruksjonen er basert på et enkelt belastningsbilde: Staver i vertikalplanet opptar trykk (knekk-krefter). Horisontale staver utsettes for bøyekrefter. Alle strekk-krefter overføres ved hjelp av stropper. Ledd og opplagringer er designet for ikke å overføre bøyemomenter. Stroppene bak på ryggen og foran under setet er lagt i kryss for å oppta skjevbelastning og diagonale bevegelser. The construction is based on a simple load picture: Rods in the vertical plane absorb pressure (buckling forces). Horizontal rods are subjected to bending forces. All tensile forces are transferred by means of straps. Joints and bearings are designed not to transmit bending moments. The straps at the back of the back and at the front under the seat are criss-crossed to accommodate skewed loads and diagonal movements.

Det er ingen løse deler og hele konstruksjonen låses i oppslått stilling med en enkel strammelås bak på ryggen. There are no loose parts and the entire construction is locked in the unfolded position with a simple tension lock at the back.

Stolen innbefatter som nevnt et rammeverk (100), en duk (400) og feste- og strammeanordninger. Duken (400) er typisk innrettet for å danne en setedel (410), en ryggdel (412) og to sideflater (413). As mentioned, the chair includes a framework (100), a cloth (400) and fastening and tightening devices. The cloth (400) is typically arranged to form a seat part (410), a back part (412) and two side surfaces (413).

Stolens oppbygning vil nå beskrives i detalj, og det vises i første omgang til fig. la, der stroppene (430,440) og spennen (435) er fremhevet av illustrative hensyn. The structure of the chair will now be described in detail, and reference is first made to fig. 1a, where the straps (430,440) and buckle (435) are highlighted for illustrative purposes.

Seterammen innbefatter to hovedsakelig parallelle sete-sidestaver (121a, 121b) svingbart sammenkoplet ved sine respektive første, ytre ender til motsatte respektive ender av en sete-tverrstav (120) ved hjelp av respektive svingbare ledd, henholdsvis forskjøvet hjørneledd (150a) og hjørneledd (150b). Ved sine respektive andre, indre ender er sete-sidestavene (121a, 121b) svingbart forbundet med respektive ledd; i en utførelsesform et seteledd (190); i en annen utførelsesform et kombinert ledd (193), som vil bli omtalt senere. The seat frame includes two substantially parallel seat side bars (121a, 121b) pivotably connected at their respective first, outer ends to opposite respective ends of a seat crossbar (120) by means of respective pivotable joints, respectively offset corner joint (150a) and corner joint ( 150b). At their respective other, inner ends, the seat side bars (121a, 121b) are pivotally connected to respective joints; in one embodiment, a seat joint (190); in another embodiment a combined link (193), which will be discussed later.

Ryggrammen innbefatter to hovedsakelig parallelle rygg-sidestaver (Illa, 111b) svingbart sammenkoplet ved sine respektive første, øvre ender til motsatte respektive ender av en hovedsakelig tverrgående stav (110) ved hjelp av respektive svingbare hjørneledd (150a, 150b). I en utførelsesform er rygg-sidestavene (11 la, 11 lb) ved sine respektive andre, nedre ender svingbart forbundet med respektive ledd (191; 193). The back frame includes two substantially parallel back-side bars (11a, 111b) pivotally coupled at their respective first upper ends to opposite respective ends of a substantially transverse bar (110) by means of respective pivotable corner joints (150a, 150b). In one embodiment, the back-side bars (11 la, 11 lb) are pivotably connected at their respective second, lower ends with respective joints (191; 193).

Den fremre benkonstruksjon innbefatter to hovedsakelig parallellefremre ben-sidestaver (130a, 130b) svingbart sammenkoplet ved sine respektive første, nedre ender til motsatte respektive ender av en hovedsakelig tverrgående stav (131) ved hjelp av respektive svingbare hjørneledd (150a, 150b). I en utførelsesform er de fremre ben-sidestavene (130a, 130b) ved sine respektive andre, øvre ender svingbart forbundet med respektive ledd (191; 193). The front leg structure includes two substantially parallel front leg side rods (130a, 130b) pivotally coupled at their respective first, lower ends to opposite respective ends of a substantially transverse rod (131) by means of respective pivotable corner joints (150a, 150b). In one embodiment, the front leg-side rods (130a, 130b) are pivotally connected at their respective second, upper ends to respective joints (191; 193).

Den bakre benkonstruksjon innbefattende to hovedsakelig parallelle bakre ben-sidestaver (140a, 140b) svingbart sammenkoplet ved sine respektive første, nedre ender til motsatte respektive ender av en hovedsakelig tverrgående stav (141) ved hjelp av respektive svingbare hjørneledd (150a, 150b): Ved sine respektive andre, øvre ender er de bakre ben-sidestavene (140a, 140b) svingbart forbundet med de respektive ledd (190; 193). The rear leg structure comprising two substantially parallel rear leg side rods (140a, 140b) pivotally coupled at their respective first, lower ends to opposite respective ends of a substantially transverse rod (141) by means of respective pivotable corner joints (150a, 150b): At at their respective other, upper ends, the rear leg side rods (140a, 140b) are pivotally connected to the respective links (190; 193).

Som det best går frem fra figurene 3,4 og 7, er sete-sidestavene (121a, 121b) teleskopiske og innrettet slik at nevnte sete-tverrstav (120) er bevegbar. As can best be seen from Figures 3, 4 and 7, the seat side bars (121a, 121b) are telescopic and arranged so that said seat cross bar (120) is movable.

Et sentralt aspekt ved stolen ifølge oppfinnelsen er stroppene (430, 440) som strekker seg rundt stolens rammeverk (100) og fortrinnsvis løper over de nevnte hovedsakelige tverrgående staver (110,120,131,141) for derved å holde stolen i en oppslått stilling. Stroppene, som overfører alle strekk-krefter, samles i en spenne (435) og er festet til stavene (110,120, 131,141) på en slik måte at elementene kan rotere fritt om de respektive staver. A central aspect of the chair according to the invention are the straps (430, 440) which extend around the chair's framework (100) and preferably run over the aforementioned mainly transverse rods (110,120,131,141) to thereby hold the chair in an unfolded position. The straps, which transmit all tensile forces, are collected in a buckle (435) and are attached to the rods (110,120, 131,141) in such a way that the elements can rotate freely around the respective rods.

De svingbare hjømeleddene (150a, 150b) innbefatter et forskjøvet hjørneledd (150a) med et omdreiningspunkt som er tilbaketrukket med en avstand i forhold til et annet hjørneledds (150b) omdreiningspunkt. Denne avstanden er fortrinnsvis større eller lik stavenes (11 la,b, 121a,b, 130a,b, 140a,b) respektive utvendige diameter. The pivotable hinge joints (150a, 150b) include an offset corner joint (150a) with a pivot point which is set back by a distance in relation to another corner joint's (150b) pivot point. This distance is preferably greater than or equal to the respective outer diameter of the rods (11 la,b, 121a,b, 130a,b, 140a,b).

Leddene (190; 193) er innrettet slik at rygg—sidestavene (Illa, 11 lb) er roterbare i vertikalplanet for i sammenfoldet tilstand å være i nærheten av, og hovedsakelig parallelt med, nevnte benkonstruksjon. The joints (190; 193) are arranged so that the back-side rods (Illa, 11 lb) are rotatable in the vertical plane so as to be in the folded state close to, and mainly parallel to, said leg structure.

I en utførelsesform er seteleddene (190) og ryggleddene (191) hovedsakelig sammenfallende og danner ett kombinert ledd (193). 1 en utførelsesform er seteleddet (190) anbrakt med en avstand fra ryggleddet (191). Som det best går frem fra fig. 2,4,6 og 7, er rygg-sidestavene (11 la, 11 lb), henholdsvis fremre og bakre ben-sidestavene (130a, 130b, 140a, 140b) og hjømeleddene (150a, 150b) kombinert på en slik måte at alle respektive par av sidestaver og hjørneledd er like lange. In one embodiment, the seat joints (190) and the back joints (191) mainly coincide and form one combined joint (193). In one embodiment, the seat joint (190) is placed at a distance from the back joint (191). As can best be seen from fig. 2,4,6 and 7, the back side bars (11 la, 11 lb), the front and rear leg side bars (130a, 130b, 140a, 140b) and the hip joints (150a, 150b) are combined in such a way that all respective pairs of side bars and corner joints are of equal length.

Fig. 6 viser at rygg-sidestavene (Illa, 111b), sete-sidestavene (121a, 121b), de fremre ben-sidestavene (130a, 130b) og de bakre ben-sidestavene (140a, 140b) i kombinasjon med nevnte hjørneledd (150a, 150b) er like lange når stolen er i en delvis sammenfoldet tilstand. Fig. 6 shows that the back side bars (Illa, 111b), the seat side bars (121a, 121b), the front leg side bars (130a, 130b) and the rear leg side bars (140a, 140b) in combination with said corner joints ( 150a, 150b) are the same length when the chair is in a partially folded state.

Ryggleddet (191) og/eller det kombinerte leddet (193) er innrettet slik at respektive par av rygg-sidestavene (Illa, 11 lb) og de fremre ben-sidestavene (130a, 130b) hovedsakelig er aksialt innrettet i forhold til hverandre når stolen er i en oppslått tilstand, som spesielt vist i fig. 3a - 3b. Videre er leddene (191; 193) innrettet slik at respektive par av rygg-sidestavene (Illa, 11 lb) og de fremre ben-sidestavene (130a, 130b) hovedsakelig er parallelt innrettet i forhold til hverandre når stolen er i en sammenfoldet tilstand (fig. 3c - 3d). The back link (191) and/or the combined link (193) are arranged so that respective pairs of the back side bars (Illa, 11 lb) and the front leg side bars (130a, 130b) are mainly axially aligned in relation to each other when the chair is in an unfolded state, as particularly shown in fig. 3a - 3b. Furthermore, the joints (191; 193) are arranged so that respective pairs of the back-side bars (Illa, 11 lb) and the front leg-side bars (130a, 130b) are mainly aligned parallel to each other when the chair is in a folded state ( Fig. 3c - 3d).

Sete-, rygg- og de kombinerte leddene (190,191; 193) er innrettet slik at rygg-sidestavene (11 la, 11 lb), sete-sidestavene (121a, 121b), de fremre ben-sidestavene (130a, 130b) og de bakre ben-sidetavene (140a, 140b) hovedsakelig er parallelt innrettet i forhold til hverandre når stolen er i en sammenfoldet tilstand. The seat, back and combined joints (190,191; 193) are arranged so that the back side bars (11 la, 11 lb), the seat side bars (121a, 121b), the front leg side bars (130a, 130b) and the the rear leg side bars (140a, 140b) are mainly parallel aligned relative to each other when the chair is in a folded state.

Hjømeleddene (150a, 150b) er innrettet slik at rygg-tverrstaven (110), sete-tverrstaven The hinge joints (150a, 150b) are arranged so that the back crossbar (110), the seat crossbar

(120), den fremre ben-tverrstaven (131) og den bakre ben-tverr-staven (141) hovedsakelig er parallelt innrettet i forhold til hverandre når stolen er i en sammenfoldet tilstand. (120), the front leg crossbar (131) and the rear leg crossbar (141) are substantially parallel aligned relative to each other when the chair is in a folded state.

En fremgangsmåte for sammenfolding av stolen ifølge oppfinnelsen kan skje ved at strammelåsen på ryggen først løsnes og stroppen tas helt ut. Ryggen (eller stavene som ryggen er festet i), som kan beskrives som en U-formet bøyle opplagret i et ledd på hver side av stolen, føres frem i en bue slik at den legger seg inntil bøylen som fremre del av setet er festet i. Denne bøylen, som fremkant av setet er festet i, er i oppslått stilling vesentlig kortere enn de andre og trekkes ved hjelp at en tilpasset teleskopisk anordning ut slik at den blir like lang som ryggbøylen. Disse to bøylene, som nå er like lange og ligger helt inntil hverandre, føres videre ned mot fremre ben (ogsa en bøyle). Disse vil da beskrive tre U-formede bøyler som ligger parallelt og helt inntil hverandre. A method for folding the chair according to the invention can be done by first loosening the tension lock on the back and removing the strap completely. The back (or the bars to which the back is attached), which can be described as a U-shaped brace supported in a joint on each side of the chair, is brought forward in an arc so that it rests against the brace to which the front part of the seat is attached This brace, to which the front edge of the seat is attached, is significantly shorter in the unfolded position than the others and is pulled out with the help of a suitable telescopic device so that it is the same length as the back brace. These two stirrups, which are now the same length and lie right next to each other, are brought further down towards the front leg (also a stirrup). These will then describe three U-shaped hoops that lie parallel and right next to each other.

Stolens bakben, som også kan beskrives som en U-formet bøyle lik de foregående, føres frem i en bue frem mot forbena. Nå vil det være 4 like store U-formede bøyler som ligger paralellt inntil hverandre. Duk og stropper vil nå henge løst ned. The back legs of the chair, which can also be described as a U-shaped brace similar to the previous ones, are brought forward in an arc towards the front legs. There will now be 4 equally sized U-shaped hoops lying parallel to each other. The cloth and straps will now hang down loosely.

Alle 4 bøylene har like ledd i hjørnene hvor aksene nå er sammenfallende. Armene på høyre side kan således felles samtidig inn mot midten, og det samme kan armene på venstre side. Bevegelsen kan sammenlignes med å slå sammen en vanlig brille. Leddene er slik utformet at armene fra den ene siden legger seg over armene fra den andre siden. Totalt vil dette da bli en tett "pakke" med 4 parallelle stenger i 3 lag. All 4 hoops have equal joints in the corners where the axes now coincide. The arms on the right side can thus be folded in towards the middle at the same time, and so can the arms on the left side. The movement can be compared to putting together an ordinary pair of glasses. The joints are designed so that the arms from one side lie over the arms from the other side. In total, this will then be a dense "package" with 4 parallel bars in 3 layers.

Duken og stroppene som henger løst ned kan da vikles rundt hele denne "pakken". Rullen puttes til slutt inn i et tilhørende futteral for lagring og/eller transport. 1 en utførelsesform har stolen ifølge oppfinnelsen en sittehøyde på omlag 35 cm; 1 sammenfoldet form er den en tilnærmet sylinderformet "pakke" med en lengde på ca. 50 cm og diameter lik ca. 6 cm. The cloth and the straps that hang down loosely can then be wrapped around this entire "package". The roll is finally put into an associated case for storage and/or transport. In one embodiment, the chair according to the invention has a seat height of approximately 35 cm; 1 folded form, it is an approximately cylindrical "package" with a length of approx. 50 cm and diameter equal to approx. 6 cm.

Stolen ifølge oppfinnelsen kan anvendes i en rekke ulike sammenhenger. Stolen har i en utførelsesform en høyde som er tilnærmet lik konvensjonelle stoler; i en annen utførelsesform er den anvendelig som f.eks. en strandstol; mens den i en tredje utførelsesform - der ryggen ikke er sammenfoldbar - i sammenfoldet tilstand er tilnærmet lik en konvensjonell fluktstol. The chair according to the invention can be used in a number of different contexts. In one embodiment, the chair has a height that is approximately the same as conventional chairs; in another embodiment, it is applicable as e.g. a beach chair; while in a third embodiment - where the back is not foldable - in the folded state it is approximately similar to a conventional deck chair.

På grunn av sin lave vekt og kompakte form i sammenfoldet tilstand, er stolen ifølge oppfinnelsen særlig egnet for bruk ved camping, til sjøs, på fotturer, etc. Stolen kan lett pakkes og/eller stues f.eks. på en sykkel, i en ryggsekk, i en kano eller lignende. Due to its low weight and compact shape when folded, the chair according to the invention is particularly suitable for use when camping, at sea, on hikes, etc. The chair can be easily packed and/or stored, e.g. on a bicycle, in a rucksack, in a canoe or similar.

Claims

1. Folding chair, including a framework (100), a canvas (400) and fastening and tensioning devices, including • a seat frame including two substantially parallel seat side bars (121a, 121b), pivotally coupled at their respective first outer ends to opposite respective ends of a mainly transverse seat crossbar (120) by means of respective pivotable corner joints (150a, 150b), which said seat sidebars (121a, 121b) at their respective other, inner ends are pivotally connected to respective seat or combined joints (190; 193); • a back frame including two substantially parallel back side bars (Illa, 111b), pivotally connected at their respective first, upper ends to opposite respective ends of a substantially transverse back cross bar (110) by means of respective pivotable corner joints (150a, 150b) ; • a front leg structure including two substantially parallel front leg side bars (130a, 130b), pivotally connected at their respective first, lower ends to opposite respective ends of a substantially transverse front leg crossbar (131) by means of respective pivotable corner joints (150a , 150b); • a rear leg structure including two substantially parallel rear leg side bars (140a, 140b), pivotably connected at their respective first lower ends to opposite respective ends of a substantially transverse rear leg crossbar (141) by means of respective pivotable corner joints (150a) , 150b), which said rear leg-side bars (140a, 140b) at their respective other, upper ends are pivotally connected to said respective seat or combined joints (190; 193), where the chair includes strain-absorbing elements (430, 435, 440) which extend around the chair's framework (100) and preferably run over said main transverse rods (110, 120, 131, 141) to thereby hold the chair in a folded position; where the chair is characterized in that • said seat-side bars (121a, 121b) are telescopic and arranged so that said seat-cross bar (120) is movable; • said corner joint (150a, 150b) includes an offset corner joint (150a) with a pivot point that is set back by a distance in relation to another corner joint's (150b) pivot point, and • said seat frame, back frame, front and rear leg structures are all pivotable connected by mainly transverse rods by means of pivoting joints.

2. Collapsible chair according to claim 1, characterized in that strain-absorbing elements (430,440) are attached to said rods (110,120, 131, 141) in such a way that the elements can rotate freely about the respective rods.

3. Collapsible chair according to claim 1, characterized in that said seat or combined joints (190, 193) are arranged so that the back-side bars (1 Ila, 11 lb) of the back frame are rotatable in the vertical plane in order to be close to, and mainly parallel to said leg structure

4. Collapsible chair according to claim 1, characterized in that said back-side rods (Illa, 111b) at their respective other, lower ends are pivotably connected to respective back or combined joints (191; 193).

5. Collapsible chair according to claim 1, characterized in that said front leg-side rods (130a, 130b) are pivotably connected at their respective other, upper ends to respective back or combined joints (191; 193);

6. Collapsible chair according to claim 1, characterized in that said distance is greater than or equal to said staves' (11 la,b, 121a,b, 130a,b, 140a,b) respective outer diameter.

7. Folding chair according to claim 1, characterized in that said seat joint (190) and back joint (191) mainly coincide and form one combined joint (193).

8- Folding chair according to claim 1, characterized in that said seat joint (190) is placed at a distance from said back joint (191).

9. Folding chair according to claim 1, characterized in that said back and leg side rods (I lia, 11 lb, 130a, 130b, 140a, 140b) and said corner joints (150a, 150b) are combined in such a way that all respective pairs of side bar and corner joint are the same length.

10. Collapsible chair according to claim 1, characterized in that said side rods (11 la, 11 lb, 121a, 121b, 130a, 130b, 140a, 140b) in combination with said corner joints (150a, 150b) are the same length when the chair is in a folded state .

11. Folding chair according to claim 1, characterized in that said seat joint (191) or combined joint (193) is arranged so that respective pairs of the back-side bars (Illa, 11 lb) and the front leg-side bars (130a, 130b) are mainly axial arranged in relation to each other when the chair is in an unfolded state.

12. Collapsible chair according to claim 1, characterized in that said seat or combined joints (191,193) are arranged so that respective pairs of the back-side bars (Illa, 11 lb) and the front leg-side bars (130a, 130b) are mainly arranged in parallel in relative to each other when the chair is in a folded state.

13. Folding chair according to claim 1, characterized in that said seat, back and combined joints (190,191,193) are arranged so that the rods (Illa, 11 lb, 121a, 121b, 130a, 130b, 140a, 140b) are mainly arranged in parallel in relation to each other when the chair is in a folded state.

14. Collapsible chair according to claim 1, characterized in that said corner joints (150a, 150b) are arranged so that the rods (110,120,131,141) are mainly parallel arranged in relation to each other when the chair is in a folded state.