NO125568B

NO125568B -

Info

Publication number: NO125568B
Application number: NO500868A
Authority: NO
Inventors: A Lande
Original assignee: Stokke Fabrikker As
Priority date: 1968-12-13
Filing date: 1968-12-13
Publication date: 1972-10-02

Description

Anordning ved svingbar og vippbar stol. Device for swiveling and tilting chair.

Den foreliggende oppfinnelse vedrbrer en anordning ved svingbar og vippbar stol forsynt med midler for fastlåsing i bnsket vippestilling, hvilken stol omfatter fjærorgan og vippelagring anordnet mellom stolens understell og setet, hvilke midler omfatter en til understellet stivt festet bakoverrettet arm, som ved fastklemming i et til stolen festet beslag kan fastholdes» The present invention relates to a device for a swiveling and tilting chair provided with means for locking in the desired tilting position, which chair comprises a spring element and a tilt bearing arranged between the chair's chassis and the seat, which means comprise a rearward-directed arm rigidly attached to the chassis, which when clamped in a the chair's attached fittings can be retained"

Slike svingbare og vippbare stoler er kjente i en rekke for-skjellige utfbrelsesformer, bl.a. som kontorstoler. Et formål med oppfinnelsen er å tilveiebringe en anordning ved en slik stol av den ovenfor nevnte type for å kunne fastlåse stolsetet med rygg i en hvilken som helst hensiktsmessig skrå stilling. Dette oppnås ifblge oppfinnelsen ved en stol av det innlednings-vis nevnte slag som kjennetegnes ved at armen i sin frie ende har en vertikal skive e.l. mot hver side av hvilken til stolsetets bakre del festede låsebakker kan klemmes, hvilke låsebakker er slik mekanisk forbundne med hverandre at de samtidig beveges enten mot eller fra skiven ved påvirkning av en betjeningsarm dreibart festet til stolsetets bakre del og ragende ut på siden av dette. Such swiveling and tilting chairs are known in a number of different designs, e.g. such as office chairs. An object of the invention is to provide a device for such a chair of the above-mentioned type to be able to lock the chair seat with the back in any suitable inclined position. This is achieved according to the invention by a chair of the type mentioned at the outset, which is characterized by the fact that the arm at its free end has a vertical disk or the like. against each side of which locking jaws attached to the rear part of the chair seat can be clamped, which locking jaws are mechanically connected to each other in such a way that they are simultaneously moved either towards or from the disc by the action of an operating arm rotatably attached to the rear part of the chair seat and projecting out to the side thereof.

Andre trekk ved den foreliggende oppfinnelse vil fremgå av den nedenfor stående beskrivelse av utfbrelseseksempler under hen-visning til tegningene, hvorpå Other features of the present invention will be apparent from the following description of exemplary embodiments with reference to the drawings, whereupon

fig. 1 viser perspektivisk understellet samt en på dette montert sarg for sete og rygg ved en stol ifblge oppfinnelsen, fig. 1 shows in perspective the underframe and a frame mounted on it for the seat and back of a chair according to the invention,

fig. 2 viser et snitt etter linjen A-S i fig. 1, fig. 2 shows a section along the line A-S in fig. 1,

fig. 3 viser et grunnriss av låsebakker ifblge oppfinnelsen, fig. 3 shows a plan of locking jaws according to the invention,

fig. 4 viser en modifikasjon av en annen utfbrelsesform av låsebakker ifblge oppfinnelsen, fig. 4 shows a modification of another embodiment of locking jaws according to the invention,

fig. 5a-c viser henholdsvis i perspektiv, oppriss og grunnriss av en ytterligere modifikasjon av låsebakker ifblge oppfinnelsen, fig. 5a-c respectively show in perspective, elevation and ground plan a further modification of locking jaws according to the invention,

fig. 6a-c viser henholdsvis grunnriss, oppriss og sideriss av en utfbrelsesform ifblge oppfinnelsen, og fig. 6a-c respectively show a ground plan, elevation and side view of an embodiment according to the invention, and

fig. 7 viser en ytterligere utfbrelsesform. fig. 7 shows a further embodiment.

Stolens understbttelse består av et benkbrs 1 sentralt på hvilket er anordnet en tapplagring 2 for en tverrbjelke 3 som i endene er forsynt med buede anleggsklosser 4 for en platefjaer 5. Plate-fjærens frie ender er festet til hver sin innside av sargen 6. Således kan stolen dreies fritt om tappforbindelsen 2, samtidig som den kan tippes ved at platefjærene 5 bbyes over de buede partier av klossene 4. The chair's support consists of a bench bridge 1 in the center of which is arranged a pin bearing 2 for a cross beam 3 which is provided at the ends with curved building blocks 4 for a plate spring 5. The free ends of the plate spring are attached to each of the insides of the frame 6. Thus, the chair rotates freely about the pin connection 2, while at the same time it can be tipped by bending the plate springs 5 over the curved parts of the blocks 4.

Fra bjelken 3 forldper ifblge oppfinnelsen en arm 7 bakover og har i den frie ende en vertikal skive 8. Ved baksiden av sargen er det anordnet en dreibar aksel 9 med en spak 10 som kan betjenes fra stolpens utside. Fig. 4 viser en brakett 11 med to utadragende drer 12, i hvilken brakett det er anordnet to bakker 13 som med hver sin plane del ligger an mot braketten 11. Den ene bakke samvirker med et venstregjenget parti på akselen 9, og den andre bakke samvirker med et hbyregjenget parti på den samme aksel. Akselen er sikret mot forskyvning i aksial retning, slik at ved betjening av spaken 10 beveges bakkene henholdsvis mot eller fra skiven 8. Gjengene har fortrinnsvis en stor stigning slik at man kun ved ubetydelig dreining av spaken 10 kan bringe bakkene til eller fra en stilling hvor de kraftig klem-mer mot skiven 8. According to the invention, an arm 7 extends backwards from the beam 3 and has a vertical disk 8 at the free end. At the back of the frame there is a rotatable shaft 9 with a lever 10 which can be operated from the outside of the post. Fig. 4 shows a bracket 11 with two protruding screws 12, in which bracket two slopes 13 are arranged, each with its flat part resting against the bracket 11. One slope interacts with a left-hand threaded part on the shaft 9, and the other slope cooperates with a high-threaded part on the same axle. The shaft is secured against displacement in the axial direction, so that when the lever 10 is operated, the slopes are respectively moved towards or away from the disc 8. The threads preferably have a large pitch so that only by turning the lever 10 insignificantly can the slopes be brought to or from a position where they strongly squeeze against the disk 8.

Således kan man med et raskt og enkelt grep fastlåse resp. fri-gjbre stolsetet i en vilkårlig skrå stilling. Ved denne symme-triske anordning av bakkene oppnår man at kun en minimal bevegelse av bakkene er nbdvendig for å bringe de i låsestilling resp. fra denne stilling. Thus, with a quick and simple grip, you can lock or free-gjbre the seat in an arbitrary inclined position. With this symmetrical arrangement of the slopes, it is achieved that only a minimal movement of the slopes is necessary to bring them into the locking position or from this position.

Fig. 3 viser en enkelt utfbrelse av låseanordningen ifblge oppfinnelsen, idet bakkene 14 her er dreibart lagret om tapper 15 mellom to utskytende brer 16 på en brakett 17 som er festet til sargen.6. Forbvrig er virkemåten den samme som i fig. 3. Fig. 3 shows a simple embodiment of the locking device according to the invention, the slopes 14 here being rotatably supported on studs 15 between two projecting beams 16 on a bracket 17 which is attached to the edge. 6. Otherwise, the operation is the same as in fig. 3.

I fig. 5a-c er vist en foretrukken utfbrelsesform av oppfinnelsen. En brakett 20 med utskytende brer 21 er festet på sargen. Akselen 9 samvirker med en bolt 22 som er lagret i et hull i det ene oret 21, og av et beslag 23 hindres mot aksialforskyv-ning. Bolten er forsynt med et parti 25 med venstregjenger og et parti 24 med hbyregjenger av samme store stigning. Det hbyregjengede parti 24 samvirker med en gren 27 av et U-formet element 26 som med utsiden av sitt livparti ligger an mot brakettens innside. Den andre grenen 28 av elementet 26 er forsynt med en skrue 29 konsentrisk anordnet med bolten 22, hvilken skrue med et gjenget parti samvirker med grenen og med et glatt parti forlbper gjennom brakettens 20 andre bre 21 for styring av det U-formede element 26. Skruen er forsynt med en kontramutter 30 for fastlåsing av skruen i bnsket posisjon. Inne i det U-formede element er anordnet en bakke 31 som med gjenget utsparing samvirker med det venstregjengede parti 25 av bolten 22. Bakken 31 ligger an mot en plan side av det U-formede element, slik at den kun kan beveges translatorisk ved påvirkning av bolten 22. Den side av bakken 31 som vender mot skruen 29, er forsynt med en lignende skrue 32 samt kontramuttere. Mellom disse skruer ligger skiven 8 som er stasjonær i forhold til tverrbjelken 3. Skruene 31 og 32 kan reguleres i forhold til skiven 8, slik at de blir liggende symmetrisk om skiven. På denne måte oppnår man at man med et minimum av bevegelse av spaken 10 kan bringe nevnte skruer til og fra låsestilling med skiven 8. In fig. 5a-c shows a preferred embodiment of the invention. A bracket 20 with projecting blades 21 is attached to the rim. The shaft 9 cooperates with a bolt 22 which is stored in a hole in the one eye 21, and is prevented from axial displacement by a bracket 23. The bolt is provided with a part 25 with left-hand threads and a part 24 with right-hand threads of the same pitch. The side-threaded part 24 cooperates with a branch 27 of a U-shaped element 26 which rests with the outside of its web part against the inside of the bracket. The second branch 28 of the element 26 is provided with a screw 29 arranged concentrically with the bolt 22, which screw with a threaded part interacts with the branch and with a smooth part continues through the second leaf 21 of the bracket 20 for controlling the U-shaped element 26. The screw is provided with a counter nut 30 for locking the screw in the desired position. Inside the U-shaped element is arranged a ground 31 which, with a threaded recess, interacts with the left-hand threaded part 25 of the bolt 22. The ground 31 rests against a flat side of the U-shaped element, so that it can only be moved translationally by impact of the bolt 22. The side of the ground 31 which faces the screw 29 is provided with a similar screw 32 and counter nuts. Between these screws is the disc 8, which is stationary in relation to the cross beam 3. The screws 31 and 32 can be adjusted in relation to the disc 8, so that they lie symmetrically around the disc. In this way, it is achieved that with a minimum of movement of the lever 10, said screws can be brought to and from the locking position with the disc 8.

Fig. 6a-c viser en utfbrelsesform hvor de to bakker 41 og 42 Fig. 6a-c shows an embodiment where the two trays 41 and 42

er festet på samme element. Dette består av to parallelle plater 43 med en viss innbyrdes avstand, idet bakken 41 og en i platenes andre ender anordnet blokk 45 danner distansestykker mellom platene. Platene 43 rager ned over kantene av midtpar-tiet 46 av en U-formet brakett som er festet til stolen. En-heten som utgjbres av platene 43 og bakken 41 og blokken 45, kan ved hjelp av bolten 44 med hbyregjenger 47 som samvirker med tilsvarende gjengepartier i blokken 45, forskyves langs den U-formede brakettens midtparti, idet elementet tvangsstyres såvel av platene 43 som ligger an mot midtpartiets utsider som av en på bakken 41 festet tapp 48 som styres av et hull i brakettens gren 49. Bakken 42 er ved hjelp av en tapp 50 hengsleforbundet med platene 43. Boltens 44 ende er forsynt med en halvkuleformet fordypning, i hvilken det ligger en kule 51 som også hviler i en tilsvarende fordypning i bakken 42. Ved dreining av bolten 44 vil det således oppstå kun minimale friksjons-krefter mellom bolten og bakken, selv hår det forekommer relativt sterke aksiale krefter. Ved dreining av bolten 44 slik at bakken 41 trekkes mot hbyre, vil samtidig bolten 44 som er stasjonær i aksialretnihgen relativt braketten, skrus stadig lengre gjennom bolten 45 og således presse bakken 42 mot bakken 41. På denne måte oppnås en samtidig bevegelse av bakkene 41 og 42 mot skiven 8. Eventuelt kan det mellom blokken 45 og bakken 42 være anordnet en fjær som streber mot å trekke disse mot hverandre, hvorved man oppnår at bakken 42 trekkes vekk fra skiven 8 når bolten 44 skrus i retning for å losne skiven 8 for regulering av stolsetets skrustilling. are attached to the same element. This consists of two parallel plates 43 with a certain mutual distance, the ground 41 and a block 45 arranged at the other ends of the plates forming spacers between the plates. The plates 43 project down over the edges of the middle part 46 of a U-shaped bracket which is attached to the chair. The unit formed by the plates 43 and the ground 41 and the block 45 can be displaced along the central part of the U-shaped bracket by means of the bolt 44 with right-hand threads 47 which interact with corresponding threaded parts in the block 45, the element being forcibly controlled by both the plates 43 and rests against the outside of the middle part as by a pin 48 attached to the base 41 which is controlled by a hole in the bracket's branch 49. The base 42 is hinged to the plates 43 by means of a pin 50. The end of the bolt 44 is provided with a hemispherical recess, in which there is a ball 51 which also rests in a corresponding recess in the ground 42. When turning the bolt 44, only minimal frictional forces will arise between the bolt and the ground, even if there are relatively strong axial forces. When turning the bolt 44 so that the ground 41 is pulled to the right, the bolt 44, which is stationary in the axial direction relative to the bracket, will at the same time be screwed further and further through the bolt 45 and thus press the ground 42 against the ground 41. In this way, a simultaneous movement of the slopes 41 is achieved and 42 against the disk 8. Optionally, a spring can be arranged between the block 45 and the ground 42 which tends to pull them towards each other, whereby it is achieved that the ground 42 is pulled away from the disk 8 when the bolt 44 is turned in the direction to loosen the disk 8 for regulating the screw position of the seat.

I fig. 7 er vist en modifikasjon av utfbrelsen ifblge fig. 6a-c, hvor det i stedet for en henglset bakke 42 er anordnet en for-skyvbar bakke 42' som styres av platene 43. Akselen 9, som kan betjenes med håndtaket 10, forlbper gjennom blokken 45' som har en skrå flate vendt mot bakken 42' som på sin side har en skrå flate vendt mot blokken 45'. På akselen 9 er det mellom disse skrå flater anordnet en eksentrisk tbnne 52 som ved dreining av akselen 9 presser blokken 45' og bakken 42' fra hverandre, hvilket bevirker at bakken 41 og bakken 42' samtidig presses mot hver sin side av skiven 8. In fig. 7 shows a modification of the embodiment according to fig. 6a-c, where, instead of a hinged tray 42, a sliding tray 42' is arranged which is controlled by the plates 43. The shaft 9, which can be operated with the handle 10, continues through the block 45' which has an inclined surface facing the ground 42' which in turn has an inclined surface facing the block 45'. On the shaft 9, an eccentric plate 52 is arranged between these inclined surfaces which, when the shaft 9 is rotated, pushes the block 45' and the ground 42' apart, causing the ground 41 and the ground 42' to simultaneously be pressed against each side of the disc 8.

Claims

1. Device for a swiveling and tilting chair provided with means for locking in the desired tilting position, which chair comprises a spring element and tilt storage arranged between the chair's underframe and the seat, which means comprises a rearward-directed arm rigidly fixed to the underframe, which when clamped in a fitting attached to the chair can be retained, characterized in that the arm (7) has a vertical disk or the like at its free end.

(8) against each side of which locking jaws (13,14) attached to the rear part of the seat can be clamped, which locking jaws are mechanically connected to each other in such a way that they are simultaneously moved either towards or away from the disc (8) by the action of an operating arm (10) rotatably attached to the rear part of the chair and projecting out to the side of this.

2. Device as stated in claim 1, characterized in that the arm (10) is connected to an axle (9) which is provided with both right- and left-hand threads which interact with each of its slopes (13,14).

3. Device as stated in claim 2, characterized in that the slopes (14) are pivotably supported (15) at one end.

4. Device as specified in claim 2, characterized in that the slopes (13) with flat sides rest against a bracket (11) and are forcibly controlled by the thread-shaped parts in translational movement.

5. Device as stated in claim 2, characterized in that one hill is formed by a U-shaped element (26) which, with the outside of its flat body part, rests against the inner body part of a U-shaped bracket (20) which interacts with the hbyreganged resp. left-hand threaded part of the pin, that towards the inside of the U-shaped element with a flat side abuts a hill (31) which cooperates with the left- (25) or side-threaded (24) part, as a screw (32) with a flat head and possibly a counter nut is arranged on the ground, so that the flat heads (29,32) lie on each side of said disk (8), the latter screw ( 29) with a cylindrical part extends through one leg of the bracket for guiding the U-shaped element.

6. Device as set forth in claim 2, characterized in that one hill is formed by a U-shaped element which with its middle part slides along the inner waist part of a U-shaped bracket attached to the chair, one side of the U-shaped element being upright branch is provided with a threaded part that cooperates with a threaded bolt or shaft, the second branch of the U-shaped element forming one hill (41) and the other hill (42) is hinged (50) with the central part of the U-shaped element and rests against the free end of the threaded shaft.

7. Device as stated in claim 2, characterized in that one hill (42') is formed by a branch of a U-shaped element which, with its central part, is displaceable along the inner waist part of a U-shaped bracket attached to the seat, the second branch of the U-shaped element is passed through by an axle (9) which can be operated (10) from the outside of the chair, and that a second hill (41) is slidably arranged along the middle part of the U-shaped element, whereby the surface of the second hill and the other branch of the U-shaped element which face each other, form a certain angle with each other and that an eccentric plate (52) is attached to the axle which rests against these obliquely continuing surfaces, so that when turning the shaft (9), the eccentric tube (52) will force the second branch of the U-shaped element and the second hill apart so that the first and second hill are pressed against each other.