DK158029B

DK158029B - AID MECHANISM WITH A DRIVE ORGAN IN THE FORM OF A GAS SPRING

Info

Publication number: DK158029B
Application number: DK305887A
Authority: DK
Inventors: Eskild Pontoppidan
Original assignee: Eskild Pontoppidan
Priority date: 1987-06-16
Filing date: 1987-06-16
Publication date: 1990-03-19
Also published as: DK305887A; DE3817102A1; DK158029C; DK305887D0; DE3817102C2

Description

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Opfindelsen angår en hjælpemekanisme med et driv-organ i form af en gasfjeder til forbindelse af en stationær del med en bevægelig del, hvis bevægelse i forhold til den stationære del skal understøttes ved hjælp 5 af drivorganet, som er drejeligt koblet med begge delene.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an auxiliary mechanism having a drive spring in the form of a gas spring for connecting a stationary part with a movable part, the movement of which relative to the stationary part is to be supported by the drive means pivotally coupled to both parts.

Sådanne mekanismer benyttes eksempelvis til at lette indstillingen af den indbyrdes position mellem to indbyrdes bevægelige dele, f.eks. ved et bord med højde-10 indstillelig bordplade, dennes position i forhold til bordets stationære del.Such mechanisms are used, for example, to facilitate the adjustment of the mutual position between two mutually moving parts, e.g. at a table with height-10 adjustable table top, its position relative to the stationary portion of the table.

Ved sådanne borde, typisk arbejdsborde, indstilles bordpladen af brugeren i den ønskede højde, i hvilken den arreteres ved hjælp af en bremse, der kan betje-15 nes af brugeren, f.eks. over en fodpedal, og som hindrer yderligere bevægelse af bordpladen. Indtil bremsen er aktiveret, skal brugeren bære en større eller mindre del af bordets last afhængigt af den kraft, som gasfjederen udøver på bordpladen i den pågældende position af bord-20 pladen.At such tables, typically work tables, the table top is set by the user at the desired height at which it is arranged by means of a brake operable by the user, e.g. over a foot pedal, which prevents further movement of the worktop. Until the brake is applied, the user must bear a greater or lesser part of the table load, depending on the force exerted by the gas spring on the table top in the respective position of the table-top plate.

Den foreliggende opfindelse tager sigte på at tilvejebringe en hjælpemekanisme, som f.eks. ved et arbejdsbord minimerer den last, der skal bæres af brugeren, indtil bremsen er aktiveret, uafhængigt af bordets 25 last.The present invention is intended to provide an auxiliary mechanism, e.g. at a work table, the load to be carried by the user minimizes until the brake is applied, independent of the table load 25.

Dette kan opnås med en hjælpemekanisme af den indledningsvis omhandlede art, som ifølge opfindelsen er ejendommelig ved, at den drejelige kobling mellem drivorganet og den ene del er forskydelig i en føring, hvori 30 den kan arreteres i forskellige positioner, og som har et sådant forløb, at drivorganets kraftudøvelse i bevægelsesretningen i det væsentlige kan holdes konstant og tilpasses varierende modstande mod bevægelsen ved tilsvarende indstilling af drivorganets koblingspunkt med 35 den ene del i føringen.This can be accomplished by an auxiliary mechanism of the kind initially provided by the invention, characterized in that the pivotal coupling between the drive means and one part is slidable in a guide in which it can be arranged in different positions and having such a course. that the driving force of the driving means in the direction of movement can be substantially kept constant and adapted to varying resistances to the movement by correspondingly adjusting the point of contact of the driving means with one part of the guide.

Som følge af den særlige føring af drivorganets koblingspunkt og muligheden for arretering af dette iDue to the special guiding of the coupling point of the drive means and the possibility of arresting this in

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2 forskellige positioner kan brugeren indstille mekanismen optimalt i overensstemmelse med den last, f.eks. vægten af en kontormaskine, som påvirker bordpladen, således at det manuelle arbejde ved ændring af bordpladens position 5 bliver minimalt.In 2 different positions, the user can optimally adjust the mechanism according to the load, e.g. the weight of an office machine affecting the countertop so that the manual work of changing the countertop position 5 becomes minimal.

Det skal nævnes, at der fra tysk fremlæggelsesskrift nr. 1 554 289 kendes en mekanisme, der fungerer på lignende måde som mekanismen ifølge den foreliggende opfindelse, men som arbejder med skruefjedre, der skal 10 forefindes i et betydeligt antal, fordi de ikke kan belastes særlig meget.It is to be noted that from German Patent Specification No. 1,554,289 a mechanism is known which functions similarly to the mechanism of the present invention, but which operates with screw springs which must be present in a considerable number because they cannot be loaded. very much.

Den særlige føring i mekanismen ifølge den foreliggende opfindelse muliggør imidlertid brug af en gasfjeder og muliggør dermed også en enklere og mere robust 15 konstruktion, som indeholder færre dele og dermed også er mere kompakt end den kendte mekanisme.However, the particular guide of the mechanism of the present invention enables the use of a gas spring and thus also enables a simpler and more robust structure which contains fewer parts and is therefore also more compact than the known mechanism.

Opfindelsen er i det følgende forklaret nærmere eksempelvis i forbindelse med dens brug i et arbejdsbord, som er vist på tegningen, hvor 20 fig· 1 A og B skematisk viser en mekanisme ifølge opfindelsen monteret i et arbejdsbord i to for skellige stillinger, og fig. 2 og 3 tilhørende vektordiagrammer.The invention is explained in greater detail below, for example, in connection with its use in a workbench, which is shown in the drawing, in which: Figs. 1A and B show schematically a mechanism according to the invention mounted in a workbench in two different positions; 2 and 3 are vector diagrams.

I fig. 1 er bordet som sådant betegnet med 1, 25 og 2 betegner den højdeindstillelige bordplade, som har et støtteben 3. Dette er ført gennem en åbning 4 i et rammestykke 5 i bordets stationære del med spil lerum i sideretningen.In FIG. 1, the table as such is denoted by 1, 25 and 2 denotes the height adjustable table top having a support leg 3. This is passed through an opening 4 in a frame piece 5 in the stationary portion of the table with lateral clearance.

Støttebenet 3 er over to arme 6 og 7 i en pa-30 rallellogramføring koblet højdeindstilleligt med en fast dél 8 i bordets stationære del.The support leg 3 is coupled vertically to two arms 6 and 7 in a parallelogram guide with a fixed part 8 in the stationary part of the table.

Ved 9 er støttebenet 3 drejeligt forbundet med den ene ende af et drivorgan 10, der her er en gasfjeder. Denne er ved sin anden ende med sin fra gas-35 cylinderen udskydelige del 11 ført i en ledeskinne 12, hvori den kan indstilles ved hjælp af et forbindelses-At 9, the support leg 3 is pivotally connected to one end of a drive means 10 which is here a gas spring. This is at its other end, with its portion 11 extendable from the gas cylinder, inserted into a guide rail 12 in which it can be adjusted by means of a connecting rod.

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3 stykke 13, hvormed den er forbundet drejeligt ved 11', og som har et rørstykke 14 med indvendigt gevind, som er i indgreb med en fra bordets overside drejelig gevindspindel 14' med udvendigt gevind.3 piece 13, with which it is pivotally connected at 11 ', and which has an inner threaded pipe piece 14 which is in engagement with an external threaded pivot spindle 14' with the external thread.

5 Den ene arm 6 i parallellogramstyret er over et kardanled 15 med et forbindelsesstykke 15' med indvendigt gevind forbundet med en gevindspindel 16, som roterer under bevægelse af bordpladen 2, og som samvirker med en bremse, der generelt er betegnet med 17.5 One arm 6 of the parallelogram guide is connected over a universal joint 15 with an internal thread 15 'with a threaded spindle 16, which rotates during movement of the countertop 2 and cooperates with a brake generally designated 17.

10 Denne kan udløses over et snortræk 18 ved betjening af en fodpedal 19 mod virkningen af en fjeder 20.This can be triggered over a drawbar 18 by operating a foot pedal 19 against the action of a spring 20.

Når bremsen er aktiveret, er mekanismen og dermed bord-^ pladen 2 fastholdt i den position, hvori den er indstillet. Når bremsen udløses, kan bordpladen 2 forsky-15 des i højderetningen, idet gevindspindelen 16 da ikke hindres i at dreje.When the brake is activated, the mechanism and thus the table plate 2 are retained in the position in which it is set. When the brake is released, the countertop 2 can be displaced in the vertical direction, since the threaded spindle 16 is not prevented from turning.

I fig. 1 er bordpladen 2 vist i sin laveste position, og gasfjederen 10 indtager den viste stilling, hvor dens trykkraft er størst. Når brugeren hæver bord-20 pladen 2 til den i fig. IB viste stilling, vil gasfjederen 10 understøtte denne bevægelse, idet dens udskydelige del 11 trykkes ud af cylinderen til en stilling af gasfjederen, hvor dens kraft er mindre.In FIG. 1, the countertop 2 is shown in its lowest position and the gas spring 10 occupies the position shown where its compressive force is greatest. When the user raises the table-top plate 2 to the one shown in FIG. 1, the gas spring 10 will support this movement as its extendable portion 11 is pushed out of the cylinder to a position of the gas spring where its force is less.

Som det fremgår af vektordiagrammet i fig. 2, er 25 imidlertid den lodrette komposant af gasfjederens kraftpåvirkning hovedsageligt ens i den øverste og i den ne-derste stilling af bordpladen. At den eventuelt kan afvige en smule herfra i mellemstillingerne har ingen praktisk betydning, fordi sådanne afvigelser er mindre 30 end friktionen i mekanismen.As shown in the vector diagram of FIG. 2, however, the vertical component of the thrust of the gas spring is substantially similar in the upper and lower positions of the worktop. That it may deviate slightly from this in the intermediate positions is of no practical significance because such deviations are less than the friction in the mechanism.

Til muliggørelse af, at denne ønskelige effekt opnås ved forskellige belastninger af bordpladen, f.eks. ved anbringelse af forskellige kontormaskiner på denne, findes ledeskinnen 12. Denne har nemlig et forløb, som 35 svarer til det geometriske sted for beliggenheden af forbindelsespunktet 11' mellem delene 11 og 13, hvor vektorkomposanterne al og a2 er lige store.To enable this desirable effect to be obtained by different loads of the worktop, e.g. in fact, by placing different office machines on it, the guide rail 12 is found. This has a path which corresponds to the geometrical location of the location of the connection point 11 'between the parts 11 and 13, where the vector components a1 and a2 are equal.

Claims

It is a coincidence that the gas spring 10 in FIG. 2 and 3 are suspended at the other end than in Fig. 1. It has no bearing on the function of the structure.

35 A PATENT REQUIREMENT 1. Auxiliary mechanism with a drive means (10) in the form of a gas spring for connecting a stationary part DK 158029 B (1,8) with a movable part (2,3) whose movement relative to the stationary part is to be supported by means of the driving means (10) which are pivotally coupled (at 9 and 11 ') with both parts, characterized in that the rotatable coupling (11') between the driving means (10) and one part is slidable in a guide ( 12) in which it can be arranged in different positions and which has such a course that the force exertion of the driving means (10) in the direction of movement of the movable part can be substantially kept constant and varying resistances to the movement can be adjusted by corresponding adjustment of the driving means. (10) coupling point with one part of the guide (12).

A mechanism according to claim 1 for a table (1) with height adjustable table top (2), which table top (2) is supported by legs, at least one (3) of which is pivotally connected to one end of a pressure actuator (10). in the form of a gas spring, the other end of which is pivotally connected to the fixed part (1,8) of the table, characterized in that the pivotal connection (11 ·) is adjustable in a guide such as a guide rail (12) having a such that the vertical component (Pi, P2) of the force of the actuator (10) on the countertop (2) is substantially equal in both end positions of the countertop and wherein the pivotal connection (11 ') is adjustable in any position corresponding to table top load.