DK143785B - MOVING MECHANISM FOR LIFTING AND SUBMITTING THE BEAR SURFACE IN A LOCATION OR SITTING FURNITURE THAT HAS A LOCKING MECHANISM FOR MAINTAINING THE BEAR SURFACE AT THE HELP OF THE MOVEMENT MECHANISM - Google Patents

MOVING MECHANISM FOR LIFTING AND SUBMITTING THE BEAR SURFACE IN A LOCATION OR SITTING FURNITURE THAT HAS A LOCKING MECHANISM FOR MAINTAINING THE BEAR SURFACE AT THE HELP OF THE MOVEMENT MECHANISM Download PDF

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Publication number
DK143785B
DK143785B DK332379A DK332379A DK143785B DK 143785 B DK143785 B DK 143785B DK 332379 A DK332379 A DK 332379A DK 332379 A DK332379 A DK 332379A DK 143785 B DK143785 B DK 143785B
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Denmark
Prior art keywords
point
support surface
arm
hinge point
frame
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DK332379A
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Danish (da)
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DK143785C (en
DK332379A (en
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B E Christiansen
J B Rasmussen
H Moeller
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Inst Produktudvikling
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Priority to DK332379A priority Critical patent/DK143785C/en
Priority to DK438579A priority patent/DK438579A/en
Priority to DE19803028771 priority patent/DE3028771A1/en
Priority to GB8025055A priority patent/GB2055754A/en
Publication of DK332379A publication Critical patent/DK332379A/en
Publication of DK143785B publication Critical patent/DK143785B/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/02Chairs with means to adjust position of patient; Controls therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/018Control or drive mechanisms

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nursing (AREA)
  • Invalid Beds And Related Equipment (AREA)

Description

1Λ3785 i1Λ3785 i

Opfindelsen angår en bevægemekanisme til løftning og sænkning af bærefladen i et ligge- eller siddemøbel, som har en låsemekanisme til fastholdelse af bærefladen i en ved hjælp af bevægemekanismen opnået 5 højdestilling.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a movement mechanism for lifting and lowering the support surface of a reclining or sitting furniture having a locking mechanism for holding the support surface in a height position obtained by means of the moving mechanism.

Der kendes mekanismer af denne art til f.eks. hospitals- eller plejehjemssenge eller tandlægestole, hvor løftningen sker ved hjælp af en pedalaktiveret mekanisk eller hydraulisk donkraft koblet di-10 rekte til bærefladen. De kendte mekanismer har den ulempe, at bevægelserne af bærefladen sker rykvis, hvilket kan være meget ubehageligt for en patient, og at løftningen kræver relativt stor kraftanvendelse og energiforbrug. Det er normalt ikke muligt for 15 patienten selv at betjene mekanismen.Mechanisms of this kind are known for e.g. hospital or nursing home beds or dental chairs, where the lifting is done by means of a pedal-activated mechanical or hydraulic jack directly connected to the carrier. The known mechanisms have the disadvantage that the movements of the support surface are jerky, which can be very uncomfortable for a patient and that the lifting requires relatively large use of energy and energy consumption. It is usually not possible for the patient to operate the mechanism himself.

En bevægemekanisme ifølge nærværende opfindelse er ejendommelig ved, at den indeholder dels et under bærefladen beliggende fjederorgan med en udragende trykstang, som er længdeforskydeligt styret 20 i en føring, der er svingbar om en på stangens længderetning vinkelret vandret akse, dels et første lænkeled, som er forbundet med trykstangens udragende ende i et første hængselpunkt og kraftoverførende forbundet med bærefladen i et 25 punkt beliggende højere end det første hængselpunkt og føringens svingakse, dels et andet lænkeled, som er forbundet med trykstangen og det første lænkeled i det første hængselpunkt, og som i et andet hængselpunkt er forbundet 30 med en indstillingsarm, der er drejelig om et fast punkt af møblets stel og strækker sig fra dette til et punkt i retning mod føringens svingakse, dels et organ til drejning af indstillingsarmen om det nævnte stelpunkt mellem en øverste og en 35 nederste yderstilling og til fastholdelse af armen i en valgt vinkelstilling, 2 1Λ3785 samt ved at mekanismens komponenter er dimensioneret således, at det andet hængselpunkt i enhver vinkelstilling af indstillingsarmen og enhver højdestilling af bærefladen ligger højere end for-5 bindelseslinien mellem det første hængselpunkt og føringens svingakse.A movement mechanism according to the present invention is characterized in that it comprises partly a spring member located below the support surface with a protruding push rod, which is longitudinally displaceable 20 in a guide pivotable about a longitudinal axis perpendicular to the longitudinal direction of the rod, and partly a is connected to the protruding end of the push rod at a first hinge point and power transmitting connected to the support surface at a point 25 higher than the first hinge point and the pivot axis of the guide, and a second link link, which is connected to the push rod and the first link link in the first hinge point, and which in another hinge point 30 is connected with an adjusting arm rotatable about a fixed point of the furniture frame and extending from it to a point towards the pivot axis of the guide, and a means for rotating the adjusting arm about said frame point between an upper and a 35 lower outer position and for holding the arm in a selected angular position, 2 1Λ3785 s in that the components of the mechanism are dimensioned such that the second hinge point in any angular position of the adjusting arm and any height position of the support surface is higher than the connecting line between the first hinge point and the pivot axis of the guide.

Med en således udformet bevægemekanisme vil en drejning af indstillingsarmen medføre en sådan ændring af geometrien for det af trykstangen og 10 de to lænkeled bestående stangsystem, gennem hvilket den af fjederorganet udøvede trykkraft søger at løfte bærefladen, at forholdet mellem den resulterende løftekraft og fjederkraften varierer fra en maksimumværdi i indstillingsarmens øverste stilling til 15 en minimumværdi i armens nederste stilling. Dette betyder, at man med bærefladen i dens laveste stilling på forhånd kan indjustere indstillingsarmens vinkelstilling således, at fjederkraften lige akkurat er tilstrækkelig til at løfte bærefladen med patient, 20 sengetøj etc. Løftebevægelsen vil ledsages af en udretning af stangsystemet på grund af, at det første hængselpunkt gennem det andet lænkeled er forbundet til det andet hængselpunkt, som efter fiksering af indstillingsarmen udgør et fast punkt, og som følge 25 heraf er det muligt at opnå en løftekraft, som uanset den faldende fjederkraft er stort set konstant i løbet af den opadgående bevægelse og i hvert fald ikke aftager under sin oprindelige værdi. Idet bærefladens bevægelse allerede begynder i det øjeblik, 30 da indstillingsarmen overskrider den stilling, hvor der er balance mellem den vægt, som skal løftes, og den gennem stangsystemet udøvede løftekraft, kan man opnå en helt jævn og rykfri løftebevægelse fremkaldt alene af den i fjederorganet akkumulerede 35 energi. Tilsvarende kan en sænkning af bærefladen gennemføres uden ryk, enten ved en lille drejning af 3 163785 indstillingsarmen i retning mod dennes nederste stilling, hvorved afbalanceringskraften aftager, eller ved at fladen manuelt trykkes nedad. Så længe den samlede vægt af bærefladen og den derpå hvilende 5 byrde er konstant, ændrer de små drejningsbevægelser af indstillingsarmen, som er tilstrækkelige til at indlede henholdsvis løftning og sænkning af bærefladen, kun i meget lille udstrækning den i fjederorganet akkumulerede energimængde. Mekanismen kræver 10 derfor kun tilsvarende lille kraftudøvelse for at bevæge bærefladen op og ned, og så længe møblet anvendes af samme patient, kan man i praksis operere med en til patientens vægt svarende, stort set konstant vinkelstilling af indstillingsarmen.With such a movement mechanism, a rotation of the adjusting arm will cause such a change in the geometry of the push rod and the two link joints through which the compressive force exerted by the spring means seeks to lift the support surface, that the ratio of the resulting lifting force to the spring force varies from a maximum value in the upper position of the adjusting arm to 15 a minimum value in the lower position of the arm. This means that with the support in its lowest position, it is possible to adjust the angular position of the adjusting arm in advance so that the spring force is just sufficient to lift the support with patient, bedding etc. The lifting movement will be accompanied by a straightening of the rod system because the first hinge point through the second link joint is connected to the second hinge point, which after fixing the adjusting arm constitutes a fixed point, and as a result 25 it is possible to obtain a lifting force which, regardless of the decreasing spring force, is substantially constant during the upward movement. movement and at least does not decrease below its original value. Since the movement of the carrier already begins at the moment when the adjusting arm exceeds the position where there is a balance between the weight to be lifted and the lifting force exerted by the bar system, a completely smooth and tear-free lifting movement can be obtained only by that in the spring means. accumulated 35 energy. Similarly, a lowering of the support surface can be effected without jerking, either by a slight rotation of the adjusting arm in the direction towards its lower position, whereby the balancing force decreases, or by manually pressing the surface downwards. As long as the total weight of the support surface and the load resting thereon is constant, the small rotational movements of the adjusting arm sufficient to initiate the lifting and lowering of the support surface, respectively, will only to a very small extent change the amount of energy accumulated in the spring means. Therefore, the mechanism requires only correspondingly small force exertion to move the support surface up and down, and as long as the furniture is used by the same patient, it is possible in practice to operate with a weight corresponding to the patient's weight, almost constant angular position of the adjusting arm.

15 I en foretrukket udførelsesform er fjederorga net en gasfjeder, hvis stempelstang tjener som trykstang, og hvis hus udgør føringen for trykstangen. Udførelsesformen har den fordel, at kraften fra gasfjederen kun aftager lidt, når dens stempel og stem-20 pelstang bevæger sig udad under bærefladens løftning.In a preferred embodiment, the spring member is a gas spring whose piston rod serves as a push rod and whose housing constitutes the guide for the push rod. The embodiment has the advantage that the force of the gas spring decreases only slightly as its piston and piston rod move outward during the lifting of the support surface.

Der kan dog også anvendes en mekanisk fjeder, når den udføres med passende lav fjederkonstant.However, a mechanical spring can also be used when it is performed with a suitable low spring constant.

Det er hensigtsmæssigt, at bevægemekanismens komponenter yderligere er dimensioneret således, at 25 det første hængselpunkt i enhver vinkelstilling af indstillingsarmen ligger tæt ved det faste stelpunkt, når bærefladen er i sin højeste stilling, og at afstanden fra føringens svingakse til det første hængselpunkt for alle højdestillinger af bærefladen af-30 tager, når indstillingsarmen drejes fra sin nederste til sin øverste yderstilling. Heraf følger, at en ændring af "afbalanceringsgraden" ved drejning af indstillingsarmen, når bærefladen ønskes sænket fra sin højeste stilling, kun medfører en lille ændring 35 af fjederorganets kompression og dermed af den akkumulerede energimængde. Endvidere følger heraf, at 143785 4 trykstangens længdevandring og derned fjederorganets mulighed for akkumulering af frigivet potentiel energi ved bærefladens sænkning udnyttes maksimalt, når indstillingsarmen er i sin øverste vinkelstilling sva-5 rende til, at den disponible løftekraft skal være maksimum.It is convenient that the components of the movement mechanism are further dimensioned such that the first hinge point at any angular position of the adjusting arm is close to the fixed frame point when the support is in its highest position and that the distance from the pivot axis of the guide to the first hinge point for all height positions of the support surface of -30 takes when the adjusting arm is rotated from its lower to its upper outer position. It follows that a change of the "balancing degree" by turning the adjusting arm when the support surface is desired to be lowered from its highest position will only result in a slight change 35 of the compression of the spring means and thus of the accumulated amount of energy. Further, it follows that the longitudinal travel of the push rod and then the spring means for accumulating potential energy released by the lowering of the support surface is maximally utilized when the adjusting arm is in its upper angular position, which means that the available lifting force must be maximum.

Mekanismen kan have et betjeningsorgan indrettet til samtidig at aktivere en mekanisk eller hydraulisk donkraft til drejning af indstillingsarmen i ret-10 ning mod dennes øverste stilling og at udløse bærefladens låsemekanisme. Herved forenkles betjeningen.The mechanism may have an actuator adapted to simultaneously activate a mechanical or hydraulic jack to rotate the adjusting arm in a direction toward its upper position and to release the locking mechanism of the support surface. This simplifies operation.

Mekanismen kan yderligere have et andet betjeningsorgan, som er bevægeligt fra en hvileposition, i hvilken bærefladen er låst, via en mellemposition, 15 i hvilken låsemekanismen udløses, til en yderposition, i hvilken donkraften frigøres til drejning af indstillingsarmen i retning mod dennes nederste stilling.The mechanism may further have a second actuator movable from a resting position in which the carrier is locked, through an intermediate position in which the locking mechanism is released, to an outer position in which the jack is released to rotate the adjusting arm towards its lower position.

Herved undgås unødigt energitab fra det som akkumulator virkende fjederorgan ved sænkning af bærefladen, 20 idet man kun behøver at frigøre indstillingsarmen - ved at føre betjeningsorganet til dettes yderposition - og derved fjerne energi fra fjederorganet, dersom fjederkraften er for høj, således at bærefladen ikke af sig selv begynder at synke, når betjenings-25 organet i sin mellemposition udløser låsemekanismen.This avoids unnecessary loss of energy from the spring actuator when lowering the support surface, 20 only having to release the adjusting arm - by moving the actuator to its outer position - thereby removing energy from the spring means if the spring force is too high, so that the support surface does not fall off. itself begins to sink as the actuator in its intermediate position releases the locking mechanism.

Opfindelsen forklares i det følgende nærmere under henvisning til den stærkt skematiske tegning, på hvilken fig. 1 viser et sidebillede, delvis i snit, 30 af en hospitdsseng udsryret med en bevægemekanisme ifølge opfindelsen, fig. 2-5 udsnit i større skala af selve bevægemekanismen i fire forskellige positioner, fig. 6 og 7 yderligere udsnit i mindre skala 35 til illustration af kraftoverføringen fra fjederorganet til sengens bæreflade, og 143785 5 fig. 8 et detailbillede af låsemekanismen for sengens bæreflade og et fælles betjeningsorgan for låsemekanismen og bevægemekanismens indstillingsarm.The invention will now be explained in more detail with reference to the highly schematic drawing, in which FIG. 1 is a side view, partly in section, of a bed of beds equipped with a movement mechanism according to the invention; FIG. 2-5 are enlarged sections of the moving mechanism itself in four different positions; 6 and 7 are further sections on a smaller scale 35 to illustrate the transfer of power from the spring means to the bed support; and FIGS. 8 is a detailed view of the locking mechanism for the bed support surface and a common actuator for the locking mechanism and the adjusting arm adjusting arm.

I fig. 1 er en hospitalsseng helt skematisk 5 illustreret ved hjælp af en af længdedragere 1 og tværdragere 2 bestående bundramme og en i lodret retning forskydelig sengeramme 3, der ligeledes består af længdedragere 4 og tværdragere 5,hvorpå sengens ikke viste bæreflade med fjederbund, madras 10 osv. hviler. Bundrammen 1, 2 hviler på rent skematisk viste hjul 6 af konventionel konstruktion.In FIG. 1, a hospital bed is fully schematically illustrated by means of a base frame consisting of longitudinal carriers 1 and transverse carriers 2 and a vertically displaceable bed frame 3, which also consists of longitudinal carriers 4 and transverse carriers 5, on which the bed surface not shown with a spring floor, mattress 10 etc. . rests. The bottom frame 1, 2 rests on the schematically shown wheel 6 of conventional construction.

Bundrammen 1, 2 og sengerammen 3 er ind byrdes forbundet ved hjælp af to parallelle, identiske stangsystemer 7, som er anbragt ved hver sin 15 langside af sengen, og hvoraf fig. 1 kun viser det ene. Hvert stangsystem består af en arm 8, som ved sin ene ende er forbundet med bundrammen i et hængselpunkt 9, og som ved sin anden ende er hængslet forbundet med et lænkeled 10, der igen er hængselforbun-20 det med sengorammen, samt af en anden arm 11, der foroven er hængselforbundet med sengerammen og forneden hængselforbundet med den ene ende af et andet lænkeled 12, som ved sin modsatte ende er hængselforbundet med bundrammen. De to arme 8 og 12 er mellem de-25 res ender indbyrdes drejeligt forbundet i et hængselpunkt 13. Ved passende dimensionering af stangsystemet 7's komponenter er det muligt at opnå en praktisk taget rent lodret bevægelse af sengarammen 3 uden uønskede samtidige forskydninger i rammens længderet-30 ning.The bottom frame 1, 2 and the bed frame 3 are interconnected by means of two parallel, identical rod systems 7, which are arranged at each longitudinal side of the bed, of which fig. 1 only shows one. Each rod system consists of an arm 8 which at one end is connected to the bottom frame of a hinge point 9 and which at its other end is hingedly connected to a link joint 10 which is again hinged to the bed frame, as well as another arm 11, which is at the top hinged to the bed frame and below the hinge to one end of another link joint 12, which at its opposite end is hinged to the bottom frame. The two arms 8 and 12 are pivotally connected between their ends at a hinge point 13. By appropriately dimensioning the components of the rod system 7, it is possible to achieve a practically pure vertical movement of the bed frame 3 without undesirable simultaneous displacements in the longitudinal frame of the frame. 30.

I forbindelse med hvert stangsystem har sengen en generelt med 14 betegnet bevægemekanisme, som indbefatter en energiakkumulator i form af en gasfjeder 15, hvis hus er monteret således på bundram-35 men, at det kan svinge om en tværgående vandret akse, der på tegningen er anskueliggjort ved et fast stel- 143785 6 punkt 16. Gasfjederen 15 kan være af konventionel konstruktion og er derfor ikke vist detaljeret. Den indeholder i sin ene ende, til højre i fig. 1-6, et kammer, hvori en gasmængde er indespærret mellem husets 5 bund og et frit bevægeligt stempel, hvis modstående sideflade sammen med et yderligere stempel og fjederhusets venstre endedel afgrænser to indbyrdes forbundne kamre, hvori en væskemængde er indespærret. Sidstnævnte stempel er fast forbundet med en stempelstang 10 17, som rager ud af gasfjederens hus.In connection with each rod system, the bed has a generally designated movement mechanism 14, which includes an energy accumulator in the form of a gas spring 15, the housing of which is mounted on the bottom frame 35 so that it can pivot about a transverse horizontal axis shown in the drawing. illustrated by a fixed frame point 16. The gas spring 15 may be of conventional construction and is therefore not shown in detail. It contains at one end, to the right of FIG. 1-6, a chamber in which a quantity of gas is confined between the bottom of the housing 5 and a freely movable piston, the opposite side surface of which together with a further piston and the left end portion of the spring housing delimits two interconnected chambers in which a quantity of liquid is confined. The latter piston is firmly connected to a piston rod 10 17 which protrudes from the gas spring housing.

Ved sin frie ende er stempelstangen 17 i et hængselpunkt 18 forbundet med den ene ende af et første lænkeled 19, som ved sin anden ende er forbundet med armen 8 i et hængselpunkt 20. En 15 indstillingsarm 21 er ved sin ene ende drejeligt forbundet med sengens bundramme 1, 2 i et fast stelpunkt 22, og ved sin modsatte ende er armen 21 i et punkt 23 hængselforbundet med et andet lænkeled 24, som ved sin modsatte ende er hængsel-20 forbundet med stempelstangen 17 og det første lænkeled 19 i disses hængselpunkt 18.At its free end, the piston rod 17 in a hinge point 18 is connected to one end of a first link joint 19, which at its other end is connected to the arm 8 in a hinge point 20. A 15 adjusting arm 21 is rotatably connected at one end to the bed. bottom frame 1, 2 in a fixed frame point 22, and at its opposite end, the arm 21 at a point 23 is hingedly connected with a second link joint 24, which at its opposite end is hinged-20 connected to the piston rod 17 and the first link joint 19 at their hinge point. 18th

Cylinderen til en hydraulisk donkraft 25 er ved sin nederste ende drejeligt forbundet med bundrammen 1, 2 i et punkt 26, og donkraftens 25 opefter udragende stempelstang 27 er i et punkt 28 hængselforbundet med indstillingsarmen 21 mellem dennes ender. Det til stempelstangen 27 fastgjorte, ikke viste stempel i donkraften løftes ved, at der pumpes olie ind under stemplet ved hjælp af en pumpe 30 29, se fig. 8, som aktiveres fra en pedal 30. Pe dalen 30 betjener også den nedenfor beskrevne låsemekanisme for stangsystemet 7, som muliggør fastholdelse af sengerammen 3 i en vilkårlig højdestilling.The cylinder of a hydraulic jack 25 is rotatably connected at its lower end to the bottom frame 1, 2 at a point 26, and the upwardly extending piston rod 27 of the jack 25 is hingedly connected to the adjusting arm 21 between its ends at a point 28. The piston, not shown in the jack, not shown on the piston rod 27 is lifted by pumping oil under the piston by means of a pump 30 29, see fig. 8, which is actuated from a pedal 30. Pe valley 30 also operates the locking mechanism of the rod system 7 described below, which enables the bed frame 3 to be held in any height position.

35 Låsemekanismen indbefatter en gasfjeder 31, se fig. 8, hvis cylinder er hængslet forbundet med 143785 7 armen 8, og hvis stempelstang 32 er hængselforbundet med sengens bundramme i et fast punkt 33.The locking mechanism includes a gas spring 31, see FIG. 8, the cylinder 8 of which is hingedly connected to the arm 8 and whose piston rod 32 is hingedly connected to the bottom frame of the bed at a fixed point 33.

I modsætning til den ovenfor omtalte gasfjeder 15, hvis væskekamre på hver sin side af væskestemplet er 5 i permanent indbyrdes forbindelse, indeholder gasfjederen 31 en ventil mellem de to nævnte kamre. Denne ventil er normalt lukket, hvorved gasfjederen låser armen 8 og dermed sengerammen 3, og den kan åbnes ved hjælp af en gennem stempelstangen 32 10 udragende udløserstift 34, som betjenes af en vippebøjle 35, der aktiveres fra pedalen 30 gennem en trykfjeder 36. Når ventilen er åben, ophæves låsningen af sengerammen 3, og gasfjederen 31 fungerer som en dæmpet fjeder, der tillader løftning 15 og sænkning af rammen.In contrast to the gas spring 15 mentioned above, whose liquid chambers on each side of the liquid piston 5 are permanently interconnected, the gas spring 31 contains a valve between the two chambers mentioned. This valve is normally closed, whereby the gas spring locks the arm 8 and thus the bed frame 3, and it can be opened by means of a release pin 34 extending through the piston rod 32 10, which is operated by a rocker bracket 35 which is activated from the pedal 30 through a compression spring 36. the valve is open, the locking of the bed frame 3 is lifted and the gas spring 31 acts as a damped spring which allows lifting 15 and lowering of the frame.

Til drejning af indstillingsarmen 21 fra dens i fig. 2 og 3 viste øverste stilling til den i fig. 4 og 5 viste nederste stilling har sengen en yderligere, ikke vist pedal, som normalt befinder 20 sig i en øverste hvileposition, fra hvilken den kan trædes ned til en nederste yderposition. Under sin vandring passerer pedalen en mellemposition, hvor den på lignende måde som pedalen 30 aktiverer de to gasfjedre 31's udløserstifter 34 og derved 25 ophæver låsningen af sengerammen 3. Hvis pedalen trædes ned til sin yderposition, åbner den yderligere en ventil, som tillader udstrømning af olie fra donkraften 25, således at armene 21 kan dreje i retning mod deres i fig. 4 og 5 viste nederste 30 stillinger.For turning the adjusting arm 21 from its position in FIG. 2 and 3 to the upper position shown in FIG. 4 and 5, the bed has an additional pedal, not shown, which is normally in an upper rest position, from which it can be pulled down to a lower outer position. During its travel, the pedal passes an intermediate position where, similarly to the pedal 30, it activates the trigger pins 34 of the two gas springs 31 and thereby 25 unlocks the bed frame 3. If the pedal is pulled down to its outer position, it further opens a valve which allows outflow of the oil from jack 25 so that the arms 21 can rotate in a direction towards their in FIG. 4 and 5 show the bottom 30 positions.

Fig. 6 og 7 tjener til at anskueliggøre, hvorledes den på gasfjederen 15's udragende stempelstang 17 virkende trykkraft transformeres til en på stangsystemet 7's arm 8 virkende løftekraft.FIG. 6 and 7 serve to illustrate how the compressive force acting on the piston rod 17 of the gas spring 15 is transformed into a lifting force acting on the arm 8 of the rod system 7.

35 Bevægemekanismens komponenter er vist i stilling omtrent svarende til den i fig. 4 viste, dvs. med sen- 143785 8 gerammen 3 i sin laveste stilling og donkraften 25's stempelstang omtrent trukket helt ind i donkraften svarende til lav "afbalanceringsgrad".35 The components of the moving mechanism are shown in position approximately similar to that of FIG. 4, i.e. with the lower frame 3 in its lowest position and the piston rod's plunger 25 approximately pulled all the way into the jack corresponding to the low "balancing degree".

Idet stempelstangen 27 og dermed indstil-5 lingsarmen 21 er fastholdt, udgør hængselpunktet 23 et fast stelpunkt for bevægemekanismen. Den på stempelstangen 17 virkende fjederkraft søger at dreje lænkeleddet 24 i urviserretningen om punktet 23 med et moment, der er betegnet med 10 Μ. I den viste stilling af punktet 23 er momentarmen om dette punkt lille, og momentet M er derfor relativt lille. Ved drejning af indstillingsarmen 21 i retning mod den i fig. 2 og 3 viste øverste stilling af armen vokser momentarmen og der-15 med også størrelsen af momentet for en given fjederkraft. Momentet M overføres til armen 8 gennem lænkeleddet 19 i form af et moment om armens drejningspunkt 9, og ved passende valg af geometrien for stangsystemet 8, 19, 24 kan man opnå, at for-20 holdet mellem og M kun varierer relativt lidt, typisk ca. 10% af sin maksimale værdi, uanset sengerammen 3's højdestilling og vinkelstillingen af indstillingsarmen 21. Af fig. 2-5 vil det endvidere ses, at fjederkraftens momentarm om punktet 23, 25 for en given beliggenhed af dette punkt, ikke varierer væsentligt med armen 8's vinkelstilling, dvs. sengerammen 3's højde. Heraf følger, at momentet og dermed den på sengerammen 3 virkende løftekraft i det væsentlige kun afhænger af afbalance-30 ringsgraden, som er fastlagt ved armen 21's vinkelstilling, men ikke af sengerammens højde, forudsat at fjederkraften er relativt konstant under stempelstangen 17's vandring, hvilket som før nævnt specielt gælder for en gasfjeder, men også kan opnås 35 med mekaniske fjedre, når disse har en passende lav fjederkonstant.As the piston rod 27 and thus the adjusting arm 21 are retained, the hinge point 23 constitutes a fixed pivot point for the movement mechanism. The spring force acting on the piston rod 17 seeks to turn the link joint 24 in a clockwise direction about the point 23 at a torque denoted by 10 Μ. In the shown position of the point 23, the torque arm about this point is small and the torque M is therefore relatively small. By turning the adjusting lever 21 in the direction of the one shown in FIG. 2 and 3, the torque arm increases, and so does the magnitude of the torque for a given spring force. The torque M is transmitted to the arm 8 through the linkage 19 in the form of a torque about the pivot point 9 of the arm, and by appropriate selection of the geometry of the rod system 8, 19, 24 it can be obtained that the relationship between and M varies only slightly, typically ca. 10% of its maximum value, regardless of the height position of the bed frame 3 and the angular position of the adjusting arm 21. By fig. 2-5, it will further be seen that the torque force of the spring force about the point 23, 25 for a given location of this point does not vary significantly with the angular position of the arm 8, ie. the height of the bed frame 3. It follows that the torque and thus the lifting force acting on the bed frame 3 depends essentially only on the degree of balancing which is determined at the angular position of the arm 21, but not on the height of the bed frame, provided that the spring force is relatively constant during the travel of the piston rod 17, which As previously mentioned, this applies especially to a gas spring, but can also be obtained with mechanical springs when they have a suitable low spring constant.

143785 9 Når det samlede system er dimensioneret således, at den samlede løftekraft, som de to bevægemekanismer udøver på armene 8, er i stand til at overvinde den største totalvægt af sengens bevægelige 5 dele, vil en frigørelse af gasfjedrene 31 ved aktivering af den ovenfor beskrevne, ikke viste pedal, når sengerammen 3 står i sin laveste stilling svarende til det i fig. 2 viste, bevirke, at stempelstængerne 17 bevæger sig ud af gasfjedrene 15's 10 huse og derved gennem lænkeleddene 19 svinger armene 8 opefter, maksimalt til den i fig. 3 viste stilling svarende til sengerammens højeste stilling. Det vil forstås, at bevægelsen opad kan standses i enhver ønsket mellemstilling ved blokering af gasfjedrene 15 31's stempler.When the overall system is dimensioned such that the total lifting force exerted by the two movement mechanisms on the arms 8 is capable of overcoming the greatest total weight of the movable 5 parts of the bed, a release of the gas springs 31 upon activation of the above The pedal described, not shown, when the bed frame 3 is in its lowest position corresponding to that of FIG. 2, cause the piston rods 17 to move out of the housings of the gas springs 15 and thereby through the link links 19 the arms 8 pivot upwards, maximum to the position shown in FIG. 3, corresponding to the highest position of the bed frame. It will be appreciated that the upward movement can be stopped at any desired intermediate position by blocking the pistons of the gas springs 15 31.

Når indstillingsarmen 21 indtager sin i fig.As the adjusting arm 21 takes its position in FIG.

4 og 5 viste nederste stilling, er den på armen 8 virkende løftekraft akkurat tilstrækkelig til at løfte den minimale totalvægt af de bevægelige dele 20 til den højeste stilling. Bevægelsen styres på samme måde som lige beskrevet.4 and 5, the lifting force acting on the arm 8 is just sufficient to lift the minimum total weight of the moving parts 20 to the highest position. The movement is controlled in the same way as just described.

Skal sengerammen 3 løftes, fra sin laveste stilling eller fra en mellemstilling, og er den på armene 8 virkende løftekraft ikke tilstrækkelig 25 hertil, aktiverer man pedalen 30, hvorved der som beskrevet ovenfor pumpes olie ind i donkraften 25, således at indstillingsarmen 21 drejer mod urviser-retningen til en højere stilling og dermed en højere afbalanceringsgrad. I det øjeblik den med armen 21's 30 drejning voksende løftekraft, repræsenteret af momentet i fig. 7, overstiger byrdens vægt, begynder sengerammen 3 at bevæge sig gradvis og rykfrit opad, hvorved gasfjedrene 31 yderligere virker som dæmpere, så længe pedalen 30 holdes nedtrykket 35 og derved påvirker udløserstifterne 34. Når pedalen slippes, lukker gasfjedrenes ventiler, hvorefter ram- 143785 ίο men er låst i den opnåede højdestilling. Skal rammen sænkes igen, kan man ved betjening af den anden, ikke viste pedal lukke så meget olie ud af donkraften 25, at indstillingsarmen 21 drejer i urviser-retningen, indtil afbalanceringsgraden er så meget 5 formindsket, at sengerammen med den eventuelt derpå liggende byrde begynder at synke.If the bed frame 3 is to be lifted, from its lowest position or from an intermediate position, and if the lifting force acting on the arms 8 is not sufficient 25 for this, the pedal 30 is activated, whereby as described above oil is pumped into the jack 25, so that the adjustment arm 21 rotates towards clockwise direction to a higher position and thus a higher degree of balancing. At the moment the lifting force of the arm 21 increases by 30, represented by the torque of FIG. 7, exceeding the weight of the load, the bed frame 3 begins to move gradually and smoothly upwards, whereby the gas springs 31 further act as dampers as long as the pedal 30 is held down 35 and thereby actuate the trigger pins 34. When the pedal is released, the gas springs shut down and then the ram springs 143785 ίο but is locked in the achieved height position. If the frame is to be lowered again, by operating the second pedal not shown, oil can be withdrawn from the jack 25 so that the adjusting arm 21 rotates clockwise until the balancing degree is so much reduced that the bed frame with the possible load on it. begins to sink.

Når vinkelstillingen af indstillingsarmene 21 svarer til en perfekt afbalancering af de bevægelige deles vægt ved hjælp af de på armene 8 virken-10 de momenter, vil det normalt være muligt at ændre sengerammens højdestilling manuelt efter udløsning af låsemekanismerne 31, 32 uden nogen drejning af armene 21 og dermed uden tab af akkumuleret energi i gasfjedrene 15.When the angular position of the adjusting arms 21 corresponds to a perfect balancing of the weight of the moving parts by means of the acts acting on the arms 8, it will normally be possible to change the height frame of the bed frame manually after release of the locking mechanisms 31, 32 without turning the arms. 21 and thus without loss of accumulated energy in the gas springs 15.

15 Blandt de mange modifikationer af den beskrev ne mekanisme, som er mulige inden for opfindelsens rammer, kan nævnes, at pedalerne, som styrer donkraften, kan erstattes af eller suppleres med håndtag anbragt således, at de kan betjenes direkte af en 20 sengeliggende patient. Det vil også være muligt at kombinere de to beskrevne pedalers aktiveringsfunktion i en enkelt pedal og/eller et enkelt håndtag. Som drivkraft til den drejelige indstillingsarm kunne også benyttes en elektromotor, som i betragtning af den rela-25 tivt lave effekt, som er nødvendig for at dreje amen, kan være batteridrevet.Among the many modifications of the described mechanism which are possible within the scope of the invention, it can be mentioned that the pedals which control the jack can be replaced or supplemented with handles arranged so that they can be operated directly by a lying patient. It will also be possible to combine the activation function of the two described pedals into a single pedal and / or a single handle. An electric motor could also be used as a driving force for the swivel adjusting arm, which, given the relatively low power required to turn the amen, may be battery operated.

Claims (2)

143785143785 1. Bevægemekanisme til løftning og sænkning af bærefladen (3) i et ligge- eller siddemøbel, som har en låsemekanisme (31, 32) til fastholdelse af bærefladen i en ved hjælp af bevægemekanismen (14) opnå- 5 et højdestilling, kendetegnet ved, at den indeholder dels et under bærefladen (3) beliggende fjederorgan (15) med en udragende trykstang (17) , som er længdeforskydeligt styret i en føring, der er svingbar om en på stangens længderetning vinkelret vandret 10 akse (16) , dels et første lænkeled (19), som er forbundet med trykstangens (17) udragende ende i et første hængselpunkt (18) og kraftoverførende forbundet med bærefladen i et punkt (20) beliggende højere end det før-15 ste hængselpunkt og føringens svingakse, dels et andet lænkeled (24), som er forbundet med trykstangen (17) og det første lænkeled (19) i det første hængselpunkt (18), og som i et andet hængselpunkt (23) er forbundet med en indstillingsarm 20 (21), der er drejelig om et fast punkt (22) af møblets stel og strækker sig fra dette stelpunkt i retning mod føringens svingakse (16), dels et organ (25) til drejning af indstillingsarmen (21) om det nævnte stelpunkt (22) mellem en 25 øverste og en nederste yderstilling og til fastholdelse af armen i en valgt vinkelstilling, samt ved at mekanismens komponenter er dimensioneret således, at det andet hængselpunkt (23) i enhver vinkelstilling af indstillingsarmen (21) og 30 enhver højdestilling af bærefladen (3) ligger højere end forbindelseslinien mellem det første hængselpunkt (18) og føringens svingakse (16).1. Moving mechanism for lifting and lowering the support surface (3) in a reclining or sitting furniture having a locking mechanism (31, 32) for holding the support surface in a height position characterized by the movement mechanism (14), characterized in that: it contains partly a spring member (15) located below the support surface (3) with a protruding push rod (17), which is longitudinally displaceable in a guide pivotable about a longitudinal axis (16) perpendicular to the longitudinal direction of the rod, and link link (19), which is connected to the protruding end of the push rod (17) at a first hinge point (18) and power transmitting connected to the support surface at a point (20) located higher than the first hinge point and the pivot axis, and a second link joint (24), which is connected to the push rod (17) and the first linkage (19) in the first hinge point (18), and which in a second hinge point (23) is connected to a setting arm 20 (21) which is rotatable about a fixed point (22) of the furniture frame and extension moving from this frame point towards the pivot axis (16) and partly a means (25) for rotating the adjusting arm (21) about said frame point (22) between an upper and a lower outer position and for holding the arm in a selected position. angular position, and in that the components of the mechanism are dimensioned such that the second hinge point (23) in any angular position of the adjusting arm (21) and any height position of the support surface (3) is higher than the connecting line between the first hinge point (18) and the pivot axis of the guide ( 16). 2. Bevægemekanisme ifølge krav 1, kendetegnet ved, at fjederorganet (15) er en gas- 35 fjeder, hvis stempelstang (17) tjener som trykstang,Movement mechanism according to claim 1, characterized in that the spring means (15) is a gas spring whose piston rod (17) serves as a push rod,
DK332379A 1979-08-08 1979-08-08 MOVEMENT MECHANISMS FOR LIFTING AND SUBMITTING THE BEAR SURFACE IN A LOCATION OR SITTING FURNITURE THAT HAS A LOCKING MECHANISM FOR MAINTAINING THE BEAR SURFACE AT THE HELP OF THE MOVEMENT MECHANISM DK143785C (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK332379A DK143785C (en) 1979-08-08 1979-08-08 MOVEMENT MECHANISMS FOR LIFTING AND SUBMITTING THE BEAR SURFACE IN A LOCATION OR SITTING FURNITURE THAT HAS A LOCKING MECHANISM FOR MAINTAINING THE BEAR SURFACE AT THE HELP OF THE MOVEMENT MECHANISM
DK438579A DK438579A (en) 1979-08-08 1979-10-17 SICK BED WITH A ROD MECHANISM CONNECTING THE BED'S LOWER FRAME FRAME WITH ITS VERTRIDLY MOVABLE BED FRAME
DE19803028771 DE3028771A1 (en) 1979-08-08 1980-07-29 MOTION MECHANISM FOR LIFTING AND LOWERING THE WING OF A LIVING OR SEAT FURNITURE WITH A LOCKING MECHANISM FOR FIXING THE WING IN A HIGH ALTITUDE REACHED BY THE MOVEMENT MECHANISM
GB8025055A GB2055754A (en) 1979-08-08 1980-07-31 An actuator mechanism for lifting and lowering the supporting surface of piece of furniture, such as a bed or chair, having a locking mechanism for maintaining the supporting surface in a vertical position obtained by means of the actuator mechanism

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK332379A DK143785C (en) 1979-08-08 1979-08-08 MOVEMENT MECHANISMS FOR LIFTING AND SUBMITTING THE BEAR SURFACE IN A LOCATION OR SITTING FURNITURE THAT HAS A LOCKING MECHANISM FOR MAINTAINING THE BEAR SURFACE AT THE HELP OF THE MOVEMENT MECHANISM
DK332379 1979-08-08

Publications (3)

Publication Number Publication Date
DK332379A DK332379A (en) 1981-02-09
DK143785B true DK143785B (en) 1981-10-12
DK143785C DK143785C (en) 1982-03-29

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Application Number Title Priority Date Filing Date
DK332379A DK143785C (en) 1979-08-08 1979-08-08 MOVEMENT MECHANISMS FOR LIFTING AND SUBMITTING THE BEAR SURFACE IN A LOCATION OR SITTING FURNITURE THAT HAS A LOCKING MECHANISM FOR MAINTAINING THE BEAR SURFACE AT THE HELP OF THE MOVEMENT MECHANISM

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Country Link
DE (1) DE3028771A1 (en)
DK (1) DK143785C (en)
GB (1) GB2055754A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558648A (en) * 1983-09-20 1985-12-17 Lift-R Technologies, Inc. Energy-recycling scissors lift
IT8304241V0 (en) * 1983-12-05 1983-12-05 Wabing Ingegneria Costruzioni AUTOBOX WITH LIFTING PLATFORM.
FR2562974B1 (en) * 1984-04-13 1990-06-01 Darmon Michel GUIDING MECHANISM, MACHINE TOOL THUS EQUIPPED, APPLICATIONS OF THE MECHANISM TO AN ARTICULATED ARM AND TO A LIFTING TABLE, AND COMBINATIONS OF TWO SUCH MECHANISMS
AU5691386A (en) * 1985-04-16 1986-11-05 Harald Elkuch Lifting device
JPH08506560A (en) * 1993-08-10 1996-07-16 アッカーマン インター リミテッド Horizontal lifting device
DE9408845U1 (en) * 1994-05-30 1994-08-11 Niesmann + Bischoff GmbH, 56751 Polch Folding bed
DE29517945U1 (en) * 1995-11-13 1996-06-20 H. Kirchner Handels GmbH, 55232 Alzey Adjustment frame for height and inclination adjustment of the bed surface in beds, both in the private area and in the area of nursing
DE19831546C1 (en) * 1998-07-14 2000-05-11 Rudolf Lehnert Lowering brake device for hydraulic lifts

Also Published As

Publication number Publication date
DK143785C (en) 1982-03-29
DK332379A (en) 1981-02-09
GB2055754A (en) 1981-03-11
DE3028771A1 (en) 1981-02-26

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