NO133610B

NO133610B -

Info

Publication number: NO133610B
Application number: NO1634/73A
Authority: NO
Inventors: Stig Parkstroem
Original assignee: Stig Parkstroem
Priority date: 1972-04-19
Filing date: 1973-04-17
Publication date: 1976-02-23
Also published as: DK135086B; FI50676B; SE354411B; NO133610C; FI50676C; DK135086C

Description

Foreliggende oppfinnelse vedrorer en skolestol med fortrinnsvis The present invention relates to a school chair with preferably

hev- og senkbart stolsete og en i forhold til dette stillbar ryggstotte, slik at skolestolen kan innstilles for den som skal anvende denne. raise and lower chair seat and a correspondingly adjustable backrest, so that the school chair can be adjusted for the person who will use it.

Det er tidligere kjent å forsyne en skoléstol med hev- og senk- It is previously known to provide a school chair with a raising and lowering

bart sete ved at stolen har teleskopben, og videre er det kjent å ha ryggstøtten forskyvbar i en av setet båret og i forhold til horisontalplanet skråstilt foring, slik at ryggstotten blir stillbar i forhold til setet. Ved disse kjente utfarelser har det imidlertid ikke vært mulig å unngå at en del av ryggs-totten eller stolsetets bæreorgan har dannet en utad ragende hindring bak stolsetet, hvorved skolestolen har fått et uonsket stort bare seat in that the chair has telescopic legs, and furthermore, it is known to have the backrest displaceable in a lining carried by the seat and inclined in relation to the horizontal plane, so that the backrest is adjustable in relation to the seat. With these known solutions, however, it has not been possible to avoid that a part of the backrest or the support member of the chair seat has formed an outwardly projecting obstacle behind the chair seat, whereby the school chair has acquired an undesired large

plassbehov. space requirements.

Foreliggende oppfinnelse har til oppgave å tilveiebringe en skolestol, som har en i vertikal- og horisontalretning i forhold til stolsetet stillbar ryggstotte uten noen bak stolsetet utad-ragende deler. The object of the present invention is to provide a school chair, which has a backrest that can be adjusted vertically and horizontally in relation to the chair seat without any parts protruding behind the chair seat.

Denne oppgave loses ifolge oppfinnelsen ved at stolsetet er forsynt med en bakfra og fremad liggende rekke av styrehull rett igjennom stolsetet og at en ryggstbtteskinne er festet under stolsetet og har en midtdel med mot stolsetets bakre del avtagende avstand fra stolsetet, samt at nevnte midtdel er forsynt med en rekke stottehull, som har noe mindre areal enn styrehullenes areal, og at ryggstøtten er nedskyvbar gjennom hvilket som helst av styrehullene og begrenset innskyvbar i et stottehull ved at på ryggstotten anordnede anslag stoter mot ryggstotteskinnen. According to the invention, this task is solved in that the chair seat is provided with a row of control holes running from the back to the front straight through the chair seat and that a back support rail is attached under the chair seat and has a central part with a decreasing distance from the chair seat towards the back of the chair seat, and that said central part is provided with a number of support holes, which have a slightly smaller area than the area of the guide holes, and that the backrest can be pushed down through any of the guide holes and can be pushed into a support hole to a limited extent by means of stops arranged on the backrest butting against the backrest rail.

Oppfinnelsen skal forklares nærmere under henvisning til en på tegningen som eksempel vist utfbrelsesform. Fig. 1 viser et vertikalt tverrsnitt gjennom midten av en skolestol ifolge oppfinnelsen. The invention shall be explained in more detail with reference to an embodiment shown in the drawing as an example. Fig. 1 shows a vertical cross-section through the middle of a school chair according to the invention.

Fig. 2 viser skolestolen sett ovenifra. Fig. 2 shows the school chair seen from above.

Fig. 3 viser et vertikalsnitt efter linjen III-III i fig. 1. Fig. 4 viser i storre målestokk et snitt efter linjen TV-IV i fig. 1. Fig. 3 shows a vertical section along the line III-III in fig. 1. Fig. 4 shows on a larger scale a section along the line TV-IV in fig. 1.

Tten på tegningen viste skolestol har en fot 1, som understøtter to benunderdeler 2 og 3, som er innskjovet i hver sin rorformede benoverdel 4 og 5 understo-ttende et stolsete 6. En (ikke vist) transmisjon er anbragt i benet 3, 5 og er påvirkbar ved hjelp av en drivaksel 7, slik at teleskopbenenes lengde og dermed stolsetets 6 hoyde er stillbar innenfor de grenser som benlengde og transmisjon -tillater. The school chair shown in the drawing has a foot 1, which supports two lower leg parts 2 and 3, which are pushed into each of the tubular upper leg parts 4 and 5 supporting a chair seat 6. A transmission (not shown) is placed in the leg 3, 5 and can be influenced by means of a drive shaft 7, so that the length of the telescopic legs and thus the height of the seat 6 can be adjusted within the limits that leg length and transmission allow.

Stolsetet 6 er ved hjelp av skruer festet til en seteplate 8 med nedboyede kanter 8'. Til seteplaten 8 og dennes kanter 8' er endene på en ryggstotteskinne festet, hvilken skinne strekker seg stort sett i U-form i stolens vertikale midtlengdeplan og består av en forreste del 9, en midtdel 10 og en bakerste del 11, idet midtdelen i retning mot stolsetets bakre del har avtagende verti-kalavstand til stolsetet og med sin lengderetning danner en til-strekkelig vinkel med horisontalplanet til at de rette propor-sjoner mellom setedybde og ryggstottehoyde skal kunne oppnås. The chair seat 6 is attached by means of screws to a seat plate 8 with bowed edges 8'. To the seat plate 8 and its edges 8', the ends of a back support rail are attached, which rail extends largely in a U-shape in the vertical mid-length plane of the chair and consists of a front part 9, a middle part 10 and a rear part 11, the middle part in the direction towards the rear part of the chair seat has a decreasing vertical distance to the chair seat and with its longitudinal direction forms a sufficient angle with the horizontal plane so that the correct proportions between seat depth and backrest height can be achieved.

Et mellomstag 12, delvis bortskåret i fig. 3 for å vise bakenfor værende deler, i form av en plate er fastsveiset til seteplaten 8 og benoverdelene 4, 5 samt ryggstotteskinnens vinkelparti mellom dennes deler 9 og 10. An intermediate strut 12, partially cut away in fig. 3 to show the parts behind, in the form of a plate welded to the seat plate 8 and upper leg parts 4, 5 as well as the angular part of the backrest rail between its parts 9 and 10.

Stolsetet 6 er i sitt lengdemidtplan forsynt med et antall i en rekke bakfra og fremad fordelte styrehull 13, som går rett igjennom stolsetet 6. Rett under hvert av styrehullene 13 ligger et stottehull 14 i ryggstotteskinnens midtdel 10. Stottehullene 14 har noe mindre areal enn styrehullenes 13 areal. En ryggstotte 15 i form av en flat skinne av fjærstål bærer en ryggplate 16 og går fritt igjennom styrehullene 13 samt har en smalere endedel 15' og inntil denne et par anslag 17, se fig. 4, idet endedelen 15' kan stikkes inn i et stottehull 14, mens anslagene 17 stoppes av skinnemidtdelens 10 overside omkring angjeldende stottehull 14. I endedelen 15" er en stoppskrue 18 innskrudd som stoter mot skinnemidtdelens 10 underside, slik at ryggstotten 15 og dermed ryggplaten 16 blir fastspent i hoyderetning. The chair seat 6 is provided in its longitudinal middle plane with a number of guide holes 13 distributed from back to front, which go straight through the chair seat 6. Directly below each of the guide holes 13 is a support hole 14 in the middle part 10 of the back support rail. The support holes 14 have a somewhat smaller area than the guide holes 13 area. A back support 15 in the form of a flat rail of spring steel carries a back plate 16 and passes freely through the guide holes 13 and has a narrower end part 15' and next to this a pair of stops 17, see fig. 4, in that the end part 15' can be inserted into a support hole 14, while the stops 17 are stopped by the upper side of the rail middle part 10 around the relevant support hole 14. In the end part 15" a stop screw 18 is screwed in which abuts against the underside of the rail middle part 10, so that the backrest 15 and thus the back plate 16 is clamped vertically.

I forbindelse med at stolsetet 6 ved dreining av drivakselen 7 innstilles i hensiktsmessig hoydestilling for en elev innstilles også ryggplaten 16 på hensiktsmessig avstand fra stolsetets forkant ved at ryggstotten 15 med stoppeskruen 18 fjernet skyves ned i egnet styrehull 13 og i det rett nedenfor forekommende stottehull 14, idet anslagene 17 stoppes mot ryggstotteskinnen og ryggplatens 16 hoyde over stolsetet blir bestemt. Derpå fastskrus stoppeskruen 18, slik at ryggstotten og dens deler fikseres til stolsetet. Av fig. 1 fremgår at ryggplaten 16 automatisk får stadig hoyere stilling over stolsetet jo mere ryggstotten flyttes bakover på stolsetet for å oke dettes sitte-flate, samt at stolen bak dens sete er uten generende deler. In connection with the fact that the chair seat 6 is set to an appropriate height position for a student by turning the drive shaft 7, the back plate 16 is also set at an appropriate distance from the front edge of the chair seat by pushing the back support 15 with the stop screw 18 removed into a suitable guide hole 13 and into the support hole 14 located immediately below , as the stops 17 are stopped against the back support rail and the height of the back plate 16 above the seat is determined. Then tighten the stop screw 18, so that the backrest and its parts are fixed to the chair seat. From fig. 1 shows that the back plate 16 automatically gets an increasingly higher position above the chair seat the more the backrest is moved backwards on the chair seat to increase its sitting surface, and that the chair behind its seat has no annoying parts.

Oppfinnelsen er ikke begrenset til den beskrevne og på tegningen viste utforelse, men kan varieres innenfor oppfinnelsens ramme. F.eks. kan to parallelle ryggstøtter bære ryggplaten, den inn-byrdes avstand mellom styrehullene og dermed også mellom stottehullene kan varieres og det er ikke nodvendig at stottehullene ligger rett under styrehullene, samt ryggstotteskinnen kan være uten forreste del 9 ved at et stag er festet mellom benoverdel- The invention is not limited to the embodiment described and shown in the drawing, but can be varied within the scope of the invention. E.g. can two parallel back supports carry the back plate, the mutual distance between the guide holes and thus also between the support holes can be varied and it is not necessary that the support holes lie directly below the guide holes, and the back support rail can be without front part 9 by a brace being attached between the upper leg part

ene 4, 5 og midtdelen 10 er festet i dette stag. Dessuten kan stolen utformes til en svingstol på en soyle av kontorstoltype. one 4, 5 and the middle part 10 are fixed in this stay. In addition, the chair can be designed as a swivel chair on an office chair-type base.

Claims

1. School chair with preferably a raise and lower chair seat (6)

and a relative to this adjustable backrest (15) with back plate (16), characterized in that the chair seat (6) is provided with a row of control holes (13) running from back to front straight through the chair seat, and that a backrest rail (9-11 ) is fixed under the chair seat (6) and has a central part (10) with a decreasing distance from the chair seat towards the back of the chair seat, and that said central part (10) is provided with a number of support holes (14), which have a slightly smaller area than the guide holes ( 13) area, and that the backrest can be pushed down through any of the guide holes (13) and is limitedly insertable into a support hole (14) by the stops (17) arranged on the backrest butting against the middle part of the backrest rail (10).

2. School chair as specified in claim 1, characterized in that each of the support holes (14) in the middle part (10) of the back support rail is vertically straight. under each guide hole (13) in the seat (6).

3. School chair as specified in claim 1 or 2, characterized in that the ends of the back support rail (9-11) are welded to a seat plate (8) supporting the chair seat and its bent edges and that a disc-shaped intermediate strut is welded between the angular part of the back support rail which is at the greatest distance from the seat plate (8), and the seat plate.