FI92282C

FI92282C - Swivel chair foot

Info

Publication number: FI92282C
Application number: FI932307A
Authority: FI
Inventors: Helena Kjellman
Original assignee: Helena Kjellman
Priority date: 1993-05-19
Filing date: 1993-05-19
Publication date: 1994-10-25
Also published as: ATE169190T1; EP0699041A1; EP0699041B1; WO1994026150A1; FI932307A0; FI92282B; DE69412256D1

Abstract

The present invention is related to a foot for a rotatable chair incorporating a hub (1) for the chair center rod (2), and a base part with an essentially trumpet-shaped contour suited for upholstering with leather or similar material. The chair foot is characterized in that the foot comprises a trumpet-shaped center part (3) made from injection-moulded material, an outer rim part (4) suited to accommodate the insertion of said center part (3) in such a manner that the contours of both parts (3, 4) adjoin forming the entire trumpet-shaped contour of the chair foot, and further comprises a circular bottom plate (5) to which said parts (3, 4) of the foot are fixed.

Description

9228292282

Fot for roterbar stol - PyOritettåvån tuolin jalkaFoot for rotatable chair - PyOritettåvån tuolin jalka

Denna uppfinning avser en fot fOr en roterbar stol innefat-tande ett nav for stolens pelare, samt ett fotparti med 5 huvudsakligen trumpetformig mantelyta avsedd att beklådas med skinn eller dylikt. Det år nårmast frågan om en fot fOr en såkallad TV-stol eller liknande tapetserede fotOljer.This invention relates to a foot for a rotatable chair comprising a hub for the pillar of the chair, as well as a foot portion with a substantially trumpet-shaped casing surface intended to be covered with leather or the like. That year comes closest to the question of a foot for a so-called TV chair or similar wall-mounted photo oils.

Tidigare kånda fotkonstruktioner fOr nåmnda typ av stolar 10 år antingen framstållda helt i metall eller uppbyggda av en metallstomme omfattende ett vertikalt nav fOr stolens pelare och två kring navet på inbOrdes avstånd från varan-dra svetsade horisontella kvardratiska stOdskivor, genom vilkas mittpunkt navet stråcker sig. Mellan dessa stOdski-15 vor år ett antal cirkelsekt ioner av trå inpassade och fixerade får att bilda de perifera delarna av den trumpet-formade foten. Ovanpå den Ovre stOdskivan appliceras en cirkulationskropp av ett något eftergivligt matertial, vårs mantelyta år avsedd att bilda det inre partiet av fotens 20 trumpetformiga yta. Framstållningen av en dylik fot år mycket komplicerad och arbetsdryg, vilket resulterar i relativt hOga tillverkningskostnader.Previously known foot structures for said type of chairs for 10 years were either made entirely of metal or constructed of a metal frame comprising a vertical hub for the pillar of the chair and two around the hub at a distance from each other, horizontal square support plates welded through each center of the hub. Between these pillars, a number of circular sections of wood fitted and fixed are formed to form the peripheral portions of the trumpet-shaped foot. On top of the upper support plate is a circulating body of a somewhat resilient material material, the spring surface of the spring intended to form the inner portion of the trumpet-shaped surface of the foot. The production of such a foot is very complicated and laborious, resulting in relatively high manufacturing costs.

FOreliggande uppfinning har till uppgift att eliminera 25 dessa problem och åstadkomma en stabil och hållbar fot med Onskad trumpetform som går snabbt och enkelt att framstålla till ett rimligt pris. Detta åstadkommes med en fot som kånnetecknas av, att foten år uppbyggd av en trumpetformig centrumdel av formpressat material, en yttre kransdel i 30 vilken centrumdelen år avsedd att passa in så att de bågge delarnas mantelytor tillsammans bildar fotens trumpetform, samt en cirkulår bottenskiva vid vilken fotens nåmnda delar år fixerade.The object of the present invention is to eliminate these problems and to provide a stable and durable foot with undamaged trumpet shape which is quick and easy to manufacture at a reasonable price. This is accomplished by a foot characterized by the foot being made up of a trumpet-shaped center portion of molded material, an outer wreath portion in which the center portion is intended to fit so that the arched surface surfaces together form the trumpet shape of the foot, and a circular bottom plate at which the aforementioned parts of the foot are fixed.

35 Uppfinningens ovriga kånnetecken framgår ur de bifogade patentkraven 1 - 9.The other characteristics of the invention are apparent from the appended claims 1 - 9.

2 92282 1 det foljande skall uppfinningen narmare beskrivas under hånvisning till de bifogade ritningarna, dår fig. 1 visat ett exempel på en fot enligt uppfinningen, 5 sett i snitt från en sida, fig. 2 visar foten enligt fig. 1 sedd uppifrån, fig. 3 visar foten enligt fig. 1 underifrån, 10 fig. 4 visar ett annat exempel på en en fot enligt uppfinningen i snitt från en sida och fig. 5 visar ett tredje exempel på en stol enligt uppfin-15 ningen sett i snitt från en sida.In the following, the invention will be described in more detail with reference to the accompanying drawings, in which Fig. 1 shows an example of a foot according to the invention, seen in section from one side; Fig. 2 shows the foot of Fig. 1 seen from above; Fig. 3 shows the foot of Fig. 1 from below, Fig. 4 shows another example of a one foot according to the invention in section from one side, and Fig. 5 shows a third example of a chair according to the invention in section from a side view. page.

Foten enligt uppfinningen innefattar ett nav 1 fOr pelaren 2 av en roterbar stol, vilken fot uppvisar en huvudsakligen trumpetformig mantelyta som år avsedd att beklådas med 20 låder eller liknande ytmaterial. Det speciella med foten enligt uppfinningen år att den år uppbyggd av en trumpet-formig centrumdel 3 av ett formpressat material, en yttre kransdel 4 i vilken centrumdelen 3 år avsedd att passa in på ett sådant sått att de bågge delarnas 3, 4 mantelytor 25 tillsammans ger foten desss trumpetform, och en cirkulår bottenskiva 5 vid vilken delarna 3 och 4 år fixerade.The foot according to the invention comprises a hub 1 for the pillar 2 of a rotatable chair, which foot has a substantially trumpet-shaped casing surface which is intended to be covered with 20 sheets or similar surface material. The special feature of the foot according to the invention is that it is made up of a trumpet-shaped center part 3 of a molded material, an outer wreath part 4 in which the center part 3 is intended to fit in such a way that the arched surfaces 25 of the arched parts 3, 4 together gives the foot its trumpet shape, and a circular bottom plate 5 at which the parts 3 and 4 are fixed.

Genom att centrumdelen 3 år framstålld av ett formpressat material, fOretrådesvis ett kompositmaterial bestående av 30 en glasfiberarmerad termoplast med ytterst stor hållfasthet kan en i centrumdelen 3 upptagen mitthålighet med fdrdel utgåra nav 1 fGr stolens pelare 2. Låmplig termoplast år polypropen, polyamid eller polykarbid. Tillråcklig stadga erhålles, medelst ett låmpligt antal vertikala och radiellt 35 riktade fårstårkningsribbor 6, vilka sammanbider navets 1 yttervågg med inre sidan av centrumdelens 3 mantelyta. Centrumdelen 3 kan i vissa fall alternativt framstållas av 3 92282 formpressad aluminium eller zink. Kransdelen 4 som inte utsåtts fdr lika stora mekaniska påfråstningar som centrumdelen 3 kan med fordel formpressas av ett billigare material såsom vanlig polypropylen eller liknande termoplast.Because the center part 3 is made of a molded material, preferably a composite material consisting of a glass fiber-reinforced thermoplastic having an extremely high strength, a center cavity included in the center part 3 can be the hub 1 for the pillar 2. The suitable thermoplastic is polypropylene, polyamide or polyamide. Sufficient stature is obtained, by means of a suitable number of vertical and radially directed sheep drying ribs 6, which connect the outer wall of the hub 1 with the inner side of the outer surface of the center portion 3. In some cases, the center part 3 may alternatively be made of aluminum or zinc molded aluminum. The crown part 4 which is not subjected to the same mechanical stresses as the center part 3 can advantageously be molded from a cheaper material such as ordinary polypropylene or similar thermoplastic.

5 Bottenskivan 5 kan med fordel vara framstålld av ett plywood eller liknande tråmaterial, vilket mbjliggOr stiftning av det yttre hdljets nedre kant på bottenskivans 5 undre sida. Om man så Onskar kan bottenskiva 5 och kransdel 4 framstållas i ett stycke t.ex. i trå, varvid 10 eventuellt endast centrumdelens 3 mantelyta beklås med lader eller liknande.The bottom plate 5 may advantageously be made of a plywood or similar wood material, which is to support the lower edge of the outer casing on the lower side of the bottom plate 5. If you see Onskar, the bottom plate 5 and the wreath part 4 can be made in one piece e.g. in wood, wherein only the outer surface area of the center part 3 is lined with drawers or the like.

For att erhålla mojligast god passform mellan centrumdel 3 och kransdel 4 kan den inre begrånsningsytan 7 upptill 15 forses med en utmed kransdelens 4 hela inre periferi lopande fals 8, vårs diameter motsvarar centrumdelens 3 yttre diameter och vårs horisontella dimension motsvarar hOjden på centrumdelens 3 yttre kantyta. Genom denna konstruktion kan samma centrumdel 3 anvåndas tillsammans 20 med kransdelar 4 med olika hOjd och olika form på sin mantelyta (Jfr, fig. 1 och fig. 4.) F5r att erhålla mOjli-gast god stadga i foten kan låmpligen ett distansstycke 15 placeras i utrymmet mellan centrumdelens fOrstårkningsrib-bor 6 och bottenskivan 5.In order to obtain the best possible fit between center part 3 and crown part 4, the inner boundary surface 7 at the top 15 can be provided with a seam 8 extending along the entire inner periphery of the crown part 4, the diameter of the spring corresponds to the outer diameter of the center part 3 and the horizontal dimension of the spring corresponds to the height of the outer edge surface of the center part 3. . By this construction, the same center part 3 can be used together with wreath parts 4 of different heights and different shapes on their mantle surface (cf. Fig. 1 and Fig. 4.) In order to obtain a good stature in the foot, a spacer 15 can be conveniently placed. in the space between the center part reinforcement ribs 6 and the bottom plate 5.

2525

Ett låmpligt sått att sammanbinda fotens olika delar med varandra sker genom skruvfOrband, t.ex. så, att varje forstårkningsribba 6 nårmast centrumdelens 3 yttre periferi uppvisar en fOrtjockning i vilken ett skruvhål 9 år uppta-30 get. Till fOljd av falsen 8 i kransdelen 4 fastspånnes kransdelen 4 vid bottenskivan 5 i och med att bottenskivan 5 fastskruvas vid centrumdelen 3. Ett låmpligt antal fOrstårkningsribbor 6 och således skruvhål 9 år fem eller sex, såsom framgår ur fig. 3.A convenient way of connecting the different parts of the foot to each other is through screw joints, e.g. so that each reinforcing rib 6 closest to the outer periphery of the center portion 3 has a thickening in which a screw hole 9 is received. As a result of the rim 8 in the wreath part 4, the wreath part 4 is clamped to the bottom plate 5 by the bottom plate 5 being screwed to the center part 3. A low number of reinforcing ribs 6 and thus screw holes 9 are five or six, as can be seen in Fig. 3.

Enligt det enklaste utfdrandet år håligheten i centrumdelens 3 mitt utformad till ett nav 1 fdr en sedvanlig pelare 35 92282 4 2 varvid håligheten har en diameter som motsvarar pelarens 2 diameter.According to the simplest embodiment, the cavity in the center of the center portion 3 is formed into a hub 1 of a conventional column 2, the cavity having a diameter corresponding to the diameter of the column 2.

Enligt ett mera sofistikerat utforande kan pelaren 2 vara 5 av en typ som år fdrsedd med returmekanism, såsom anges på ritningen, varvid en något stOrre cylinderformig hålighet bdr upptas i centrumdelen 3 så att en kring pelaren 2 anordnad fjåderbelastad, axiellt fdrskjutbar glid 10 får plats inuti navet 1, vilken glid 10 nedtill uppvisar en 10 kamyta 11 som år anordnad att påverka ett vid pelaren 2 fixerat lophjul 12, vilken typ av returmekanism finns beskriven t.ex. i finska patentskriften nr. 83 590. For att erhålla en klanderfri och slitstark konstruktion fOrses navets 1 bottenparti med ett såte fdr pelarens 2 ånde 15 vilket fungerar som glidlager fdr pelaren 2, och navets 1 dvre parti med ett kullager 13.According to a more sophisticated embodiment, the pillar 2 may be of a type provided with a return mechanism, as indicated in the drawing, whereby a slightly larger cylindrical cavity should be accommodated in the center portion 3 so that a spring-loaded, axially displaceable slide 10 arranged around the column 2 inside the hub 1, which slide 10 at the bottom has a cam surface 11 which is arranged to actuate a impeller 12 fixed to the pillar 2, which type of return mechanism is described e.g. in the Finnish patent specification no. 83 590. In order to obtain a blemish-free and durable construction, the bottom portion of the hub 1 is lined with a pad for the column 15, which acts as a slide bearing for the column 2, and the hub portion 1 with a ball bearing 13.

Enligt en foredragen utfdringsform uppvisar centrumdelen 3 en dverst kring navet 1 anordnad uppstående krage 14, 20 vilken utgdr fortsåttning på den trumpetformiga mantelytan. Denna krage har nårmast tre funktioner, dels maskerar den anslutningen mellan sittdel och fot och dels mdjliggdr den den en effektiv och enkel fastsåttning av dvre ånden av ett over foten spånnt formsytt låderholje. Detta sker genom 25 att vika ovre kantpartiet av låderholjet over kragen 14 in i den av kragen 14 bildade håligheten, varefter en cirkulår spånnfjåder anpassas att spånna lågerholjets kantparti mot kragens 14 inre våggyta.According to a preferred embodiment, the center part 3 has a raised collar 14 arranged around the hub 1, which extends continuation on the trumpet-shaped casing surface. This collar has almost three functions, firstly it masks the connection between the seat part and the foot and partly it allows it to effectively and simply attach the dry spirit of an over-foot spun-shaped leather sheath. This is done by folding the upper edge portion of the ladle casing over the collar 14 into the cavity formed by the collar 14, after which a circular chip spring is adapted to chip the edge portion of the casing sleeve against the inner wall surface of the collar 14.

IIII

Claims

5 92282

A foot for a rotatable chair comprising a hub (1) for the pillar (2) of the chair, and a foot portion having a substantially trumpet-shaped casing surface intended to be lined with leather or the like, characterized therefrom, that the foot is made up of a trumpet-shaped center part (3) of molded material, an outer garland portion (4) in which the center portion (3) is intended to fit so that the casing surfaces of the luggage parts (3, 4) together form the trumpet shape of the foot, and a circular bottom plate (5) at which the said parts (3, 4) of the foot are fixed.

Foot according to Claim 1, characterized in that the inner boundary surface (7) of the coronet (4) at the top has an inner peripheral (8) extending along the coronet (4), the diameter of the spring corresponds to the outer diameter of the central part (3) and the horizontal. dimension corresponds to the height of the outer edge surface of the center part (3). 20

3. A foot according to claim 2, characterized in that the three main parts (3, 4, 5) of the foot are held together by screw connection (9) between the base plate (5) and the center part (3). 25

4. A foot according to claim 3, characterized in that the center part (3) is formed into a hub (1) for a conventional pillar (2).

Foot according to claim 3, characterized in that the centimeter (3) is formed into a hub (1) for a pillar (2) with return. 1 foot according to any one of the preceding claims, characterized in that the center portion (3) at the top of the hub (1) ^ has an upright collar (14) as a continuation of the trumpet-shaped casing surface. 92282

7. A foot according to any one of the preceding claims, characterized in that the center part (3) is made of a composite material consisting of glass fiber reinforced thermoplastics, such as polypropylene, polyamide or polycarbide. 5

Foot according to one of claims 1-6, characterized in that the center part (3) is made of aluminum or zinc.

9. A foot according to claim 6, characterized in that an Over foot spun shaped seamed leather housing is fixed at the top of a circular chip spring, abutting against the leather housing's Over collar (14), weighted Upper edge portion of the cavity (14) formed and down by means of pins at the lower side of the bottom plate (5).