EP0702947A1 - Turning plate with sitting or standing-up surface for disabled persons - Google Patents

Turning plate with sitting or standing-up surface for disabled persons Download PDF

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Publication number
EP0702947A1
EP0702947A1 EP95109775A EP95109775A EP0702947A1 EP 0702947 A1 EP0702947 A1 EP 0702947A1 EP 95109775 A EP95109775 A EP 95109775A EP 95109775 A EP95109775 A EP 95109775A EP 0702947 A1 EP0702947 A1 EP 0702947A1
Authority
EP
European Patent Office
Prior art keywords
turntable
ring element
ring
base plate
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95109775A
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German (de)
French (fr)
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EP0702947B1 (en
Inventor
Klaus Janisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schmidt and Lenhardt GmbH and Co OHG
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Schmidt and Lenhardt GmbH and Co OHG
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Publication of EP0702947A1 publication Critical patent/EP0702947A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/1073—Parts, details or accessories
    • A61G7/1076—Means for rotating around a vertical axis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2200/00—Information related to the kind of patient or his position
    • A61G2200/30—Specific positions of the patient
    • A61G2200/34—Specific positions of the patient sitting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2200/00—Information related to the kind of patient or his position
    • A61G2200/30—Specific positions of the patient
    • A61G2200/36—Specific positions of the patient standing

Definitions

  • the invention relates to a method for gradually changing the turning behavior of a turntable consisting of a base plate and a turntable, with which the turntable is supported on the base plate.
  • Such a turntable is known from US-A-5,000,513.
  • the rotating plate is rotatably held in the central area by means of a bearing attachment on the base plate and is supported outside of this bearing area with an annular surface on the base plate. There is a sliding connection between the rotating plate and the base plate.
  • Such turntables are used by both lightweight and heavy people. Since the torque is load-dependent, a light person needs only a small torque, but a heavy person needs a much larger torque.
  • the friction pairing has a predetermined coefficient of friction that is tailored to medium-weight people. The turntable is therefore too easy for light people, the reverse applies to heavy people.
  • the smoothness of the turntable can be increased by installing rolling bearings, as is known, for example, from US-A-2,757,388, which would mean an improvement for heavy people, but this turntable would be unsuitable for light-weight people, because disabled people can only imperfect their movements control and, a fine dosage of a very low torque is often not possible for them.
  • the turntable creates fear and uncertainty.
  • the object of the invention is to design a turntable of the type mentioned in such a way that the turning behavior can be adapted to individual needs in a simple manner.
  • the turntable according to the invention has several options for influencing the rotational resistance.
  • the ring element can be removed so that the rotating plate slides directly on the base plate, as in the known rotary plate.
  • the rotational resistance is the greatest.
  • the rotating plate slides on the ring element and this in turn slides on the base plate. Thanks to the easy mobility of the ring element in the ring groove of the rotary plate and / or the base plate, a relative sliding movement between the rotary plate and the ring element or between the ring element and the base plate or between the two pair of sliding surfaces can occur.
  • the resistance to rotation is thus reduced.
  • a further reduction in the torque required during operation is achieved by inserting rolling elements into the openings in the ring element.
  • the sliding movement is replaced by a rolling movement, whereby the rotational resistance is further reduced.
  • the ring element only acts as a cage, that is, it no longer has any influence on the turntable plate. If you use such Rolling elements, the speed of rotation of the ring element is half that of the rotating plate.
  • the number of rolling elements used also affects the smooth running of the rotating plate. In the case of a turntable with eight openings in the ring element, a lower level of smoothness can be achieved by inserting four rolling elements than when inserting eight rolling elements, which represents the step with the lowest resistance to rotation.
  • the turntable according to the invention thus has an at least three-stage, if desired, but also a four, five or six-stage adjustability of its rotational resistance, so that the cheapest rotational resistance can be set individually for the user.
  • a further development consists in that the sliding surfaces of the ring element are formed on narrow webs projecting from the ring element on the top and bottom sides. Although this increases the surface load on the narrower sliding surfaces, which has little or no effect on the rotational resistance, cavities are created between the webs, which are used to hold dust particles and foreign bodies that have penetrated. If the webs are preferably oriented in two groups of web arrangements crossing each other at right angles, with a pair of linearly aligned webs of both groups being aligned radially to the axis of rotation of the rotary plate, a conceivable arrangement circular webs ensures that no raceways form on the opposite flat sliding surfaces of the rotating plate and base plate.
  • the openings have on a pair of mutually opposite upper edges and on a pair of mutually opposite lower edges holding tabs which overlap the respective rolling element above and below and prevent it from falling out, the holding tabs being elastically deformable on at least one pair of edges for the insertion and removal of the rolling element are trained. It is therefore sufficient to press a finger on each rolling element to snap it into the opening of the ring element and, accordingly, to be able to push it out again.
  • the rolling elements at most with the exception of their end faces, are cylindrical and the openings are rectangular in the radial section of the ring element, the rolling elements being supported in the openings with rotational play.
  • the ring groove for the ring element can optionally be provided on the bottom side in the rotating plate or on the top side in the bottom plate, as is also possible to provide mutually corresponding ring grooves in both plates.
  • a turntable 10 consists of a circular disk-shaped rotating plate 12, a base plate 14, which is also illustrated here in the form of a circular disk, but could also be elongated, a cushion pad 16 on the rotating plate 12, a locking ring 18 which is clamped onto the outer edge of the rotating plate 12 and overlaps the outer circumference of the cushion pad 16, as well as a central bearing which rotatably supports the rotary plate 12 on the base plate 14 and consists of a rotary plate connector 22 and a base plate socket 24, which interlock positively and are connected to one another by a screw.
  • the bottom plate 24 On the bottom side, the bottom plate 24 has a rubber ring strip 26, which serves to increase the grip on a base.
  • a number of annular support surfaces 28, 30, 32 are formed on the rotating plate 12, with which the rotating plate 12 could be supported on the flat bottom plate 14 on the top side, namely when the 34 in FIG. 1 illustrated sliding and / or rolling arrangement is not provided or is removed from the rotary plate 12.
  • annular groove 36 is provided on the bottom side, in which an annular element 38 with radial running gaps is rotatably mounted coaxially with the axis of rotation 40 of the rotary plate 12.
  • the thickness of the ring element 38 is slightly greater than the depth of the ring groove 36, so that upper and lower sliding surfaces are formed on the ring element 38, one with the bottom surface of the ring groove 36 and the other with the top surface of the bottom plate 14 Form pair of sliding surfaces. These pair of sliding surfaces have a low coefficient of friction, so that the rotational resistance of the rotary plate 12 using the ring element 38 is lower than without this ring element 38.
  • the ring element 38 has two groups of intersecting webs 40, 42 which project from the top and bottom surfaces and on which sliding surfaces 44, 46 are formed which lie in parallel radial planes.
  • the webs 40, 42 delimit flat chambers in which dust particles and the like can collect.
  • the ring element 38 has eight radially directed openings 48 which are arranged at equal circumferential spacings and are rectangular in cross section, but which need not serve to receive cylindrical rolling elements 50.
  • the rolling elements 50 are aligned exactly radially to the axis of rotation 40 of the ring element 38 and are arranged in the openings 48 so as to be easily rotatable.
  • the diameter of the rolling elements 50 is slightly larger than the effective thickness of the ring element 38, which is measured between the two parallel planes in which the sliding surfaces 44, 46 of the webs 40, 42 lie.
  • This excess of the rolling element diameter compared to the thickness of the ring element 38 can be so small that the sliding friction between the sliding surfaces 44 on the bottom surface of the annular groove 36 and the sliding surfaces 46 on the top surface of the bottom plate 14 is only reduced, but not canceled, so that the load on the Turntable 10 is distributed both on the rolling elements 50 and on the sliding surfaces 44, 46.
  • the set of rolling elements with a smaller diameter being used if a combined sliding-rolling bearing arrangement is desired.
  • the set of slightly larger rolling elements 50 would then be used to To eliminate sliding friction, so that in this case the ring element 38 only serves as a cage for the rolling elements and, when the rotary plate 12 is rotated, only rotates under load, but without transmitting force to the base plate 14. In this case, the ring element 38 rotates half as fast as the rotating plate 12, ie when the rotating plate 12 is rotated 90 °, the ring element 38 only rotates 45 °.
  • each opening 48 there are tabs 52 which run along the central section of the opening 58 and which engage under the rolling element 50. At the two ends of the upper edges of the opening 48, similar tabs 54 are formed, which overlap the rolling element 50. These tabs 52, 54 are elastically flexible, so that the rolling elements 50 can be easily pressed into the openings 48 by finger pressure and can also be pushed out again. It is understood that the rolling elements 50 are exposed between the pairs of tabs in order to be able to roll on the respective counter surfaces on the rotary plate 12 and the base plate 14.
  • eight openings 48 are provided, so that when a rolling element 50 is inserted in each of these openings, a very low rotational resistance for the turntable 10 is achieved. This allows a comfortable turn with little force when loaded by a heavy person. If the rotational resistance is to be increased, the number of rolling elements 50 can be halved in a first increase stage, such that every second rolling element is removed. In a next step of increasing the rotational resistance, these last rolling elements 50 are also removed, so that the ring element 38 then loses its guiding function as a cage for the rolling elements, but instead receives a supporting function in the form of a slide ring. If the rotary resistance of the turntable 10 is still too large for the respective application, the ring element becomes 38 completely removed from the recess 36, so that the now forced stiffness when rotating the turntable 10 is suitable for particularly lightweight people.

Landscapes

  • Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Rolling Contact Bearings (AREA)
  • Chairs Characterized By Structure (AREA)
  • Adornments (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Seats For Vehicles (AREA)
  • Toys (AREA)

Abstract

The slewing plate (12) is easily removable from the base plate (14), on which it is mounted via a central bearing. In a first working condition, the slewing plate is supported from the base plate by an annular surface (28,30,32) on its underside. In a second, a freely rotating slip-ring (38) is inserted in an annular groove (36) in one of the mating faces on the plates, its top and bottom surfaces having low coefficients of friction, while its thickness is greater than the groove depth, so that it forms the sole support for the slewing plate. In a third condition, bearing rollers turning freely are inserted in openings in the slip-ring. Their effective dia. is greater than the ring thickness, so that they form the sole support for the slewing plate, while the ring acts as a bearing cage.

Description

Die Erfindung betrifft ein Verfahren zur stufenweisen Veränderung des Drehverhaltens eines aus einer Bodenplatte und einer Drehplatte bestehenden Drehtellers, mit der sich die Drehplatte auf der Bodenplatte abstützt.The invention relates to a method for gradually changing the turning behavior of a turntable consisting of a base plate and a turntable, with which the turntable is supported on the base plate.

Ein derartiger Drehteller ist aus der US-A-5,000,513 bekannt. Die Drehplatte ist im zentralen Bereich mittels eines Lageransatzes an der Bodenplatte drehbar gehalten und stützt sich außerhalb dieses Lagerbereiches mit einer Kreisringfläche auf der Bodenplatte ab. Zwischen Drehplatte und Bodenplatte besteht eine Gleitverbindung. Solche Drehteller werden gleichermaßen von leichtgewichtigen wie von schwergewichtigen Personen benutzt. Da die Drehkraft belastungsabhängig ist, benötigt eine leichte Person nur eine geringe Drehkraft, eine schwere Person aber eine viel größere Drehkraft. Die Reibungspaarung hat bei dem bekannten Drehteller einen vorgegebenen Reibungsbeiwert, der auf mittelschwere Personen abgestimmt ist. Für leichte Personen ist daher der Drehteller zu leichtgängig, umgekehrtes gilt für schwergewichtige Personen.Such a turntable is known from US-A-5,000,513. The rotating plate is rotatably held in the central area by means of a bearing attachment on the base plate and is supported outside of this bearing area with an annular surface on the base plate. There is a sliding connection between the rotating plate and the base plate. Such turntables are used by both lightweight and heavy people. Since the torque is load-dependent, a light person needs only a small torque, but a heavy person needs a much larger torque. In the known turntable, the friction pairing has a predetermined coefficient of friction that is tailored to medium-weight people. The turntable is therefore too easy for light people, the reverse applies to heavy people.

Nun läßt sich zwar die Leichtgängigkeit des Drehtellers durch Einbau von Wälzlagern erhöhen, wie dies z.B. aus der US-A-2,757,388 bekannt ist, was für Schwergewichtige eine Verbesserung bedeuten würde, für Leichtgewichtige wäre dieser Drehteller aber ungeeignet, denn Behinderte können ihre Bewegungen nur unvollkommen steuern und, eine Feindosierung einer nur sehr geringen Drehkraft ist für sie häufig nicht möglich. Bei leichtgewichtigen Personen erzeugt der Drehteller Ängste und Unsicherheit.Now the smoothness of the turntable can be increased by installing rolling bearings, as is known, for example, from US-A-2,757,388, which would mean an improvement for heavy people, but this turntable would be unsuitable for light-weight people, because disabled people can only imperfect their movements control and, a fine dosage of a very low torque is often not possible for them. For light-weight people, the turntable creates fear and uncertainty.

Aufgabe der Erfindung ist es, einen Drehteller der eingangs genannten Art so auszubilden, daß das Drehverhalten an die individuellen Bedürfnisse auf einfache Weise angepaßt werden kann.The object of the invention is to design a turntable of the type mentioned in such a way that the turning behavior can be adapted to individual needs in a simple manner.

Diese Aufgabe wird mit den Merkmalen der Ansprüche 1 oder 2 gelöst.This object is achieved with the features of claims 1 or 2.

Aus der US-A-2905229 ist zwar ein Drehstuhl bekannt, bei dem im Drehteil und im Bodenteil einander zugewandte Ringnuten sowie ein in diese eingesetzter Käfig mit Wälzkörpern vorgesehen sind, jedoch gibt dieses Dokument keine Anregung, den Käfig auch als Gleitelement ohne die Wälzkörper verwenden zu können.From US-A-2905229 a swivel chair is known, in which in the rotating part and in the bottom part facing annular grooves and an inserted cage with rolling elements are provided in this document, but this document gives no suggestion to use the cage as a sliding element without the rolling elements to be able to.

Der erfindungsgemäße Drehteller besitzt aufgabengemäß mehrere Möglichkeiten, den Drehwiderstand zu beeinflussen. Für besonders Leichtgewichtige kann das Ringelement entfernt werden, sodaß die Drehplatte wie bei dem bekannten Drehteller unmittelbar auf der Bodenplatte gleitet. Der Drehwiderstand ist damit am größten. In der nächsten Einstellstufe gleitet die Drehplatte auf dem Ringelement und dieses gleitet seinerseits auf der Bodenplatte. Dank der leichten Beweglichkeit des Ringelementes in der Ringnut der Drehplatte und/oder der Bodenplatte kann eine relative Gleitbewegung zwischen Drehplatte und Ringelement oder auch zwischen Ringelement und Bodenplatte oder zwischen beiden Gleitflächenpaarungen auftreten. Der Drehwiderstand wird somit herabgesetzt. Eine weitere Verringerung der im Betrieb notwendigen Drehkraft wird durch Einsetzen von Wälzkörpern in die Durchbrüche des Ringelementes erreicht. Aufgrund der Durchmessergröße der Wälzkörper mit Bezug auf die Dicke des Ringelementes, wird die Gleitbewegung durch eine Wälzbewegung ersetzt, wodurch der Drehwiderstand weiter herabgesetzt wird. Wichtig ist, daß bei Verwendung von Wälzkörpern das Ringelement nur noch als Käfig wirkt, also keinen Reibungseinfluß mehr auf die Drehtellerplatte hat. Verwendet man solche Wälzkörper, so ist die Drehgeschwindigkeit des Ringelementes halb so groß wie die der Drehplatte. Auch die Zahl der eingesetzten Wälzkörper wirkt sich auf die Leichtgängigkeit der Drehplatte aus. Bei einem Drehteller mit acht Durchbrüchen im Ringelement, kann durch Einsetzen von vier Wälzkörpern eine niedrigere Leichtgängigkeitsstufe erreicht werden als beim Einsetzen von acht Wälzkörpern, welche die Stufe mit geringstem Drehwiderstand darstellt. Der Drehteller gemäß der Erfindung hat also eine mindestens dreistufige, falls gewünscht aber auch eine vier, fünf- oder sechsstufige Einstellbarkeit seines Drehwiderstandes, sodaß der günstigste Drehwiderstand auf den Benutzer individuell eingestellt werden kann.The turntable according to the invention has several options for influencing the rotational resistance. For particularly light-weight items, the ring element can be removed so that the rotating plate slides directly on the base plate, as in the known rotary plate. The rotational resistance is the greatest. In the next setting stage, the rotating plate slides on the ring element and this in turn slides on the base plate. Thanks to the easy mobility of the ring element in the ring groove of the rotary plate and / or the base plate, a relative sliding movement between the rotary plate and the ring element or between the ring element and the base plate or between the two pair of sliding surfaces can occur. The resistance to rotation is thus reduced. A further reduction in the torque required during operation is achieved by inserting rolling elements into the openings in the ring element. Due to the diameter of the rolling elements with respect to the thickness of the ring element, the sliding movement is replaced by a rolling movement, whereby the rotational resistance is further reduced. It is important that when using rolling elements, the ring element only acts as a cage, that is, it no longer has any influence on the turntable plate. If you use such Rolling elements, the speed of rotation of the ring element is half that of the rotating plate. The number of rolling elements used also affects the smooth running of the rotating plate. In the case of a turntable with eight openings in the ring element, a lower level of smoothness can be achieved by inserting four rolling elements than when inserting eight rolling elements, which represents the step with the lowest resistance to rotation. The turntable according to the invention thus has an at least three-stage, if desired, but also a four, five or six-stage adjustability of its rotational resistance, so that the cheapest rotational resistance can be set individually for the user.

Dabei liegt es im Rahmen dieser Erfindung, den Drehteller auch ohne das eingesetzte Ringelement, oder ohne die eingesetzten Wälzkörper zu verkaufen und das Ringelement und/oder die Wälzkörper im Beipack zu liefern oder auf Wunsch nachzuliefern, wenn eine erhöhte Leichtgängigkeit erwünscht wird. Wesentlich für die Erfindung ist, daß mindestens eine Ringnut zum Einsetzen des Ringelementes und Durchbrüche im Ringelement für das auch nachträgliche Einsetzen von Wälzkörpern vorhanden sind.It is within the scope of this invention to sell the turntable even without the ring element used, or without the rolling elements used, and to supply the ring element and / or the rolling elements in an accessory pack or to supply them on request if increased ease of movement is desired. It is essential for the invention that at least one ring groove for inserting the ring element and openings in the ring element for the subsequent insertion of rolling elements are available.

Eine Weiterbildung besteht darin, daß die Gleitflächen des Ringelementes an schmalen, deckseitig und bodenseitig vom Ringelement vorstehenden Stegen ausgebildet sind. Zwar erhöht sich damit die Flächenbelastung auf die schmaleren Gleitflächen, was sich aber auf den Drehwiderstand nicht oder kaum auswirkt, jedoch werden zwischen den Stegen Hohlräume geschaffen, die zur Aufnahme eingedrungener Staubteilchen und Fremdkörper dienen. Wenn die Stege vorzugsweise in zwei Gruppen einander rechtwinklig kreuzender Steganordnungen orientiert sind, wobei jeweils ein Paar linear ausgerichteter Stege beider Gruppen radial zur Drehachse der Drehplatte ausgerichtet sind, wird gegenüber einer denkbaren Anordnung kreisringförmiger Stege erreicht, daß sich keine Laufbahnen an den gegenüberliegenden ebenen Gleitflächen von Drehplatte und Bodenplatte bilden.A further development consists in that the sliding surfaces of the ring element are formed on narrow webs projecting from the ring element on the top and bottom sides. Although this increases the surface load on the narrower sliding surfaces, which has little or no effect on the rotational resistance, cavities are created between the webs, which are used to hold dust particles and foreign bodies that have penetrated. If the webs are preferably oriented in two groups of web arrangements crossing each other at right angles, with a pair of linearly aligned webs of both groups being aligned radially to the axis of rotation of the rotary plate, a conceivable arrangement circular webs ensures that no raceways form on the opposite flat sliding surfaces of the rotating plate and base plate.

Die Durchbrüche weisen an einem Paar einander gegenüberliegender Oberränder und an einem Paar einander gegenüberliegender Unterränder jeweils Haltelappen auf, die den jeweiligen Wälzkörper oben und unten übergreifen und diesen am Herausfallen hindern, wobei die Haltelappen an wenigstens einem Randpaar für das Einsetzen und Herausnehmen des Wälzkörpers elastisch verformbar ausgebildet sind. Es genügt also ein Fingerdruck auf jeden Wälzkörper, um diesen in den Durchbruch des Ringelementes einschnappen zu lassen und entsprechend auch aus diesem wieder herausdrücken zu können.The openings have on a pair of mutually opposite upper edges and on a pair of mutually opposite lower edges holding tabs which overlap the respective rolling element above and below and prevent it from falling out, the holding tabs being elastically deformable on at least one pair of edges for the insertion and removal of the rolling element are trained. It is therefore sufficient to press a finger on each rolling element to snap it into the opening of the ring element and, accordingly, to be able to push it out again.

Gemäß einer Weiterbildung sind die Wälzkörper, allenfalls mit Ausnahme ihrer Stirnflächen, zylindrisch und die Durchbrüche sind im Radialschnitt des Ringelementes rechteckförmig ausgebildet, wobei die Wälzkörper in den Durchbrüchen mit Drehspiel gelagert sind.According to a further development, the rolling elements, at most with the exception of their end faces, are cylindrical and the openings are rectangular in the radial section of the ring element, the rolling elements being supported in the openings with rotational play.

Die Ringnut für das Ringelement kann wahlweise bodenseitig in der Drehplatte oder deckseitig in der Bodenplatte vorgesehen sein, wie es auch möglich ist, miteinander korrespondierende Ringnuten in beiden Platten vorzusehen.The ring groove for the ring element can optionally be provided on the bottom side in the rotating plate or on the top side in the bottom plate, as is also possible to provide mutually corresponding ring grooves in both plates.

Anhand der Zeichnung, die ein Ausführungsbeispiel darstellt, wird die Erfindung näher beschrieben.The invention is described in more detail with reference to the drawing, which represents an exemplary embodiment.

Es zeigt:

FIG. 1
einen Querschnitt durch den neuen Drehteller,
FIG: 2
eine Draufsicht auf ein, in den Drehteller eingebautes, Ringelement,
FIG. 3
eine vergrößerte Ansicht des Details X der Figur 2,
FIG. 4
einen Querschnitt längs der Linie A-A der Figur 3, und
FIG. 5
einen Querschnitt längs der Linie B-B der Figur 3.
It shows:
FIG. 1
a cross section through the new turntable,
FIG: 2
a plan view of a ring element built into the turntable,
FIG. 3rd
3 shows an enlarged view of the detail X of FIG. 2,
FIG. 4th
a cross section along the line AA of Figure 3, and
FIG. 5
4 shows a cross section along the line BB in FIG. 3.

Ein Drehteller 10 besteht aus einer kreisscheibenförmigen Drehplatte 12, einer Bodenplatte 14, die hier ebenfalls kreisscheibenförmig veranschaulicht ist, jedoch auch länglich ausgebildet sein könnte, einer Polsterauflage 16 auf der Drehplatte 12, einem Rastring 18, der auf den Außenrand der Drehplatte 12 aufgeklemmt ist und den äußeren Umfang der Polsterauflage 16 übergreift, sowie einem zentralen Lager, welches die Drehplatte 12 an der Bodenplatte 14 drehbar lagert und aus einem Drehplattenstecker 22 und einer Bodenplattenbuchse 24 besteht, die formschlüssig ineinandergreifen und durch eine Schraube miteinander verbunden sind.A turntable 10 consists of a circular disk-shaped rotating plate 12, a base plate 14, which is also illustrated here in the form of a circular disk, but could also be elongated, a cushion pad 16 on the rotating plate 12, a locking ring 18 which is clamped onto the outer edge of the rotating plate 12 and overlaps the outer circumference of the cushion pad 16, as well as a central bearing which rotatably supports the rotary plate 12 on the base plate 14 and consists of a rotary plate connector 22 and a base plate socket 24, which interlock positively and are connected to one another by a screw.

Bodenseitig weist die Bodenplatte 24 einen Gummiringstreifen 26 auf, welcher der Hafterhöhung auf einer Unterlage dient. Bodenseitig ist an der Drehplatte 12 eine Anzahl ringförmiger Stützflächen 28, 30, 32 ausgebildet, mit denen sich die Drehplatte 12 auf der deckseitig ebenen Bodenplatte 14 abstützen könnte, nämlich dann, wenn die mit 34 in FIG. 1 veranschaulichte Gleit-und/oder Wälzanordnung nicht vorgesehen ist oder aus der Drehplatte 12 entfernt wird.On the bottom side, the bottom plate 24 has a rubber ring strip 26, which serves to increase the grip on a base. On the bottom side, a number of annular support surfaces 28, 30, 32 are formed on the rotating plate 12, with which the rotating plate 12 could be supported on the flat bottom plate 14 on the top side, namely when the 34 in FIG. 1 illustrated sliding and / or rolling arrangement is not provided or is removed from the rotary plate 12.

In der Drehplatte 12 ist bodenseitig eine Ringnut 36 vorgesehen, in der ein Ringelement 38 mit radialen Laufspalten koaxial zur Drehachse 40 der Drehplatte 12 drehbar gelagert ist. Die Dicke des Ringelementes 38 ist geringfügig größer als die Tiefe der Ringnut 36, sodaß am Ringelement 38 obere und untere Gleitflächen gebildet werden, die einerseits mit der Bodenfläche der Ringnut 36 und andererseits mit der Deckfläche der Bodenplatte 14 jeweils eine Gleitflächenpaarung bilden. Diese Gleitflächenpaarungen haben einen niedrigen Reibungsbeiwert, sodaß der Drehwiderstand der Drehplatte 12 unter Verwendung des Ringelementes 38 kleiner ist als ohne dieses Ringelement 38.In the rotary plate 12, an annular groove 36 is provided on the bottom side, in which an annular element 38 with radial running gaps is rotatably mounted coaxially with the axis of rotation 40 of the rotary plate 12. The thickness of the ring element 38 is slightly greater than the depth of the ring groove 36, so that upper and lower sliding surfaces are formed on the ring element 38, one with the bottom surface of the ring groove 36 and the other with the top surface of the bottom plate 14 Form pair of sliding surfaces. These pair of sliding surfaces have a low coefficient of friction, so that the rotational resistance of the rotary plate 12 using the ring element 38 is lower than without this ring element 38.

Das Ringelement 38 weist zwei Gruppen einander kreuzender, von den Deck- und Bodenflächen jeweils erhaben vorstehender Stege 40, 42 auf, an denen in parallelen Radialebenen liegende Gleitflächen 44, 46 ausgebildet sind. Die Stege 40, 42 grenzen flache Kammern ein, in denen sich Staubpartikel und dergl. sammeln können.The ring element 38 has two groups of intersecting webs 40, 42 which project from the top and bottom surfaces and on which sliding surfaces 44, 46 are formed which lie in parallel radial planes. The webs 40, 42 delimit flat chambers in which dust particles and the like can collect.

Das Ringelement 38 weist acht in gleichen Umfangsabständen angeordnete radial gerichtete, im Querschnitt rechteckförmige Durchbrüche 48 auf, die zur Aufnahme von zylindrischen Wälzkörpern 50 dienen können aber nicht müssen. Die Wälzkörper 50 sind exakt radial zur Drehachse 40 des Ringelementes 38 ausgerichtet und sind in den Durchbrüchen 48 leicht drehbar angeordnet. Der Durchmesser der Wälzkörper 50 ist geringfügig größer als die wirksame Dicke des Ringelementes 38, die zwischen den beiden parallelen Ebenen gemessen wird, in denen die Gleitflächen 44, 46 der Stege 40, 42 liegen. Dieses Übermaß des Wälzkörperdurchmessers gegenüber der Dicke des Ringelementes 38 kann so klein sein, daß die Gleitreibung zwischen den Gleitflächen 44 an der Bodenfläche der Ringnut 36 und der Gleitflächen 46 auf der Deckfläche der Bodenplatte 14 lediglich vermindert, nicht aber aufgehoben wird, sodaß die Belastung des Drehtellers 10 sowohl auf die Wälzkörper 50 als auch auf die Gleitflächen 44, 46 verteilt wird.The ring element 38 has eight radially directed openings 48 which are arranged at equal circumferential spacings and are rectangular in cross section, but which need not serve to receive cylindrical rolling elements 50. The rolling elements 50 are aligned exactly radially to the axis of rotation 40 of the ring element 38 and are arranged in the openings 48 so as to be easily rotatable. The diameter of the rolling elements 50 is slightly larger than the effective thickness of the ring element 38, which is measured between the two parallel planes in which the sliding surfaces 44, 46 of the webs 40, 42 lie. This excess of the rolling element diameter compared to the thickness of the ring element 38 can be so small that the sliding friction between the sliding surfaces 44 on the bottom surface of the annular groove 36 and the sliding surfaces 46 on the top surface of the bottom plate 14 is only reduced, but not canceled, so that the load on the Turntable 10 is distributed both on the rolling elements 50 and on the sliding surfaces 44, 46.

So liegt es ohne weiteres im Rahmen der Erfindung, zwei Satz Wälzkörpergrößen dem Drehteller 10 lose beizugeben, wobei der Satz von im Durchmesser kleineren Wälzkörpern eingesetzt wird, wenn eine kombinierte Gleit-Wälzlagerung erwünscht ist. Der Satz etwas größerer Wälzkörper 50 würde dann eingesetzt werden, um die Gleitreibung zu eliminieren, sodaß das Ringelement 38 in diesem Fall lediglich als Laufkäfig für die Wälzkörper dient und sich beim Drehen der Drehplatte 12 unter Last lediglich mitdreht, ohne jedoch Kraft auf die Bodenplatte 14 zu übertragen. In diesem Fall dreht sich das Ringelement 38 halb so schnell wie die Drehplatte 12, d.h. bei einer 90°-Drehung der Drehplatte 12 führt das Ringelement 38 nur eine 45°-Drehung aus.Thus, it is within the scope of the invention to add two sets of rolling element sizes to the turntable 10 loosely, the set of rolling elements with a smaller diameter being used if a combined sliding-rolling bearing arrangement is desired. The set of slightly larger rolling elements 50 would then be used to To eliminate sliding friction, so that in this case the ring element 38 only serves as a cage for the rolling elements and, when the rotary plate 12 is rotated, only rotates under load, but without transmitting force to the base plate 14. In this case, the ring element 38 rotates half as fast as the rotating plate 12, ie when the rotating plate 12 is rotated 90 °, the ring element 38 only rotates 45 °.

An den Unterrändern jedes Durchbruches 48 befinden sich längs des Mittelabschnittes des Durchbruches 58 verlaufende Lappen 52, die den Wälzkörper 50 untergreifen. An den beiden Enden der Oberränder des Durchbruches 48 sind ähnliche Lappen 54 angeformt, welche den Wälzkörper 50 übergreifen. Diese Lappen 52, 54 sind elastisch biegsam, sodaß die Wälzkörper 50 durch Fingerdruck leicht in die Durchbrüche 48 eingedrückt und auch wieder herausgedrückt werden können. Es versteht sich, daß die Wälzkörper 50 zwischen den Lappenpaaren frei liegen, um sich auf den jeweiligen Gegenflächen an der Drehplatte 12 und der Bodenplatte 14 abwälzen zu können.On the lower edges of each opening 48 there are tabs 52 which run along the central section of the opening 58 and which engage under the rolling element 50. At the two ends of the upper edges of the opening 48, similar tabs 54 are formed, which overlap the rolling element 50. These tabs 52, 54 are elastically flexible, so that the rolling elements 50 can be easily pressed into the openings 48 by finger pressure and can also be pushed out again. It is understood that the rolling elements 50 are exposed between the pairs of tabs in order to be able to roll on the respective counter surfaces on the rotary plate 12 and the base plate 14.

Im Ausführungsbeispiel sind acht Durchbrüche 48 vorgesehen, sodaß beim Einsetzen eines Wälzkörpers 50 in jedem dieser Durchbrüche ein sehr geringer Drehwiderstand für den Drehteller 10 erreicht wird. Dieser erlaubt bei Belastung durch eine schwergewichtige Person eine komfortable Drehung mit geringer Kraft. Soll der Drehwiderstand erhöht werden, kann in einer ersten Erhöhungsstufe die Zahl der Wälzkörper 50 halbiert werden, derart, daß jeder zweite Wälzkörper entfernt wird. In einer nächsten Erhöhungsstufe des Drehwiderstandes werden auch diese letzten Wälzkörper 50 herausgenommen, sodaß dann das Ringelement 38 seine Führungsfunktion als Käfig für die Wälzkörper verliert, dafür aber eine Stützfunktion in Form eines Gleitringes erhält. Ist für den jeweiligen Anwendungsfall der Drehwiderstand des Drehtellers 10 immer noch zu groß, so wird das Ringelement 38 gänzlich aus der Vertiefung 36 herausgenommen, sodaß die nunmehr erzwungene Schwergängigkeit beim Drehen des Drehtellers 10 für besonders leichtgewichtige Personen geeignet ist.In the exemplary embodiment, eight openings 48 are provided, so that when a rolling element 50 is inserted in each of these openings, a very low rotational resistance for the turntable 10 is achieved. This allows a comfortable turn with little force when loaded by a heavy person. If the rotational resistance is to be increased, the number of rolling elements 50 can be halved in a first increase stage, such that every second rolling element is removed. In a next step of increasing the rotational resistance, these last rolling elements 50 are also removed, so that the ring element 38 then loses its guiding function as a cage for the rolling elements, but instead receives a supporting function in the form of a slide ring. If the rotary resistance of the turntable 10 is still too large for the respective application, the ring element becomes 38 completely removed from the recess 36, so that the now forced stiffness when rotating the turntable 10 is suitable for particularly lightweight people.

Claims (10)

Verfahren zur stufenweisen Veränderung des Drehverhaltens eines aus einer Bodenplatte und einer an dieser leicht abnehmbar zentral gelagerten Drehplatte bestehenden Drehtellers, dadurch gekennzeichnet, daß sich in einer ersten Stufe die Drehplatte (12) mit mindestens einer bodenseitigen Kreisringfläche (28, 30, 32) auf der Bodenplatte (14) abstützt, daß in einer zweiten Stufe in mindestens eine Ringnut (36) in einer der einander zugewandten Flächen beider Platten (12, 14) ein frei drehbares Ringelement (38) eingesetzt wird, dessen deck- und bodenseitigen Gleitflächen niedrige Reibungsbeiwerte aufweisen, und dessen axial gemessene Dicke größer als die Tiefe der Ringnut (36) ist, sodaß sich die Drehplatte (12) nur über diesen, als leicht drehbarer Gleitring wirkenden Ringelement (38) auf der Bodenplatte (14) abstützt, und daß in einer dritten Stufe in Durchbrüche (48) des Ringelementes (38) Wälzkörper (50) leicht drehbar eingesetzt werden, deren wirksamer Durchmesser größer als die effektive Dicke des Ringelementes (38) ist, sodaß sich die Drehplatte (12) nur über die Wälzkörper (50) auf der Bodenplatte (14) abstützt und das Ringelement (38) nur als Führungskäfig für die Wälzkörper (50) wirkt.Process for the gradual change in the turning behavior of a turntable consisting of a base plate and a turntable centrally mounted on the turntable, characterized in that , in a first step, the turntable (12) with at least one circular ring surface (28, 30, 32) on the bottom Base plate (14) supports that in a second stage in at least one annular groove (36) in one of the facing surfaces of the two plates (12, 14) a freely rotatable ring element (38) is used, the top and bottom sliding surfaces of which have low coefficients of friction , and whose axially measured thickness is greater than the depth of the annular groove (36), so that the rotary plate (12) is supported only by this ring element (38) acting as an easily rotatable sliding ring on the base plate (14), and that in a third Step in openings (48) of the ring element (38) rolling elements (50) can be easily rotated, the effective diameter is larger ß than the effective thickness of the ring element (38), so that the rotary plate (12) is supported only on the rolling elements (50) on the base plate (14) and the ring element (38) acts only as a guide cage for the rolling elements (50). Verfahren zur stufenweisen Veränderung des Drehverhaltens eines aus einer Bodenplatte und einer an dieser leicht abnehmbar zentral gelagerten Drehplatte bestehenden Drehtellers, dadurch gekennzeichnet, daß sich in einer ersten Stufe die Drehplatte (12) mit mindestens einer bodenseitigen Kreisringfläche (28, 30, 32) auf der Bodenplatte (14) abstützt, daß in einer zweiten Stufe in mindestens ein Paar miteinander korrespondierender Ringnuten (36) in den einander zugewandten Flächen beider Platten (12, 14) ein frei drehbares Ringelement (38) eingesetzt wird und dessen axial gemessene Dicke größer als die Summe der Tiefen beider Ringnuten (36) ist, sodaß sich die Drehplatte (12) nur über dieses, als leicht drehbarer Gleitring wirkendes Ringelement (38) auf der Bodenplatte (14) abstützt und daß in einer dritten Stufe in Durchbrüche (48) des Ringelementes (38) Wälzkörper (50) leicht drehbar eingesetzt werden, deren wirksamer Durchmesser größer als die effektive Dicke des Ringelementes (38) ist, sodaß sich die Drehplatte (12) nur über die Wälzkörper (50) auf der Bodenplatte (14) abstützt und das Ringelement (38) nur als Führungskäfig für die Wälzkörper (50) wirkt.Process for the gradual change in the turning behavior of a turntable consisting of a base plate and a turntable centrally mounted on the turntable, characterized in that , in a first step, the turntable (12) with at least one circular ring surface (28, 30, 32) on the bottom Base plate (14) supports that in a second stage in at least one pair of corresponding annular grooves (36) in the mutually facing surfaces of both plates (12, 14) a freely rotatable ring element (38) is used and its axially Measured thickness is greater than the sum of the depths of both ring grooves (36), so that the rotary plate (12) is supported only by this ring element (38) acting as an easily rotatable sliding ring on the base plate (14) and in a third stage in openings (48) of the ring element (38) rolling elements (50) can be easily rotated, the effective diameter of which is greater than the effective thickness of the ring element (38), so that the rotating plate (12) is only on the rolling element (50) on the base plate ( 14) and the ring element (38) only acts as a guide cage for the rolling elements (50). Nach dem Verfahren gemäß Anspruch 1 oder 2 in seinem Dreh-verhalten veränderbarer Drehteller (10) dessen Drehplatte (12) mit einer Kreisringfläche (28, 30, 32) auf der Bodenplatte (14) drehbar abgestützt oder abstützbar ist, dadurch gekennzeichnet, daß in mindestens einer der Platten (12, 14) eine kreisringförmige, koaxial zur Drehplatte (12) liegende, der anderen der beiden Platten (12, 14) zugewandte Ringnut (36) vorgesehen ist, in der ein leicht drehbares Ringelement (38) einsetzbar oder eingesetzt ist, dessen effektive axiale Wandstärke etwas größer als die auf die Kreisringfläche (28, 30, 32) bezogene Tiefe der Ringnut (36) ist, sodaß das Ringelement (38) geringfügig aus der Ringnut (36) herausragt und daß sich in dem Ringelement (38) mehrere in gleichen Umfangsabständen vorgesehene Durchbrüche (48) befinden, in die mindestens einige leicht drehbare Wälzkörper (50) einsetzbar oder eingesetzt sind, deren wirksamer Durchmesser geringfügig größer als die effektive Dicke des Ringelementes (38) ist.According to the method of claim 1 or 2 in its rotating behavior variable turntable (10) whose rotary plate (12) is rotatably supported or can be supported on the base plate (14) with an annular surface (28, 30, 32), characterized in that in At least one of the plates (12, 14) is provided with an annular groove (36) lying coaxially to the rotating plate (12) and facing the other of the two plates (12, 14), in which an easily rotatable ring element (38) can be inserted or inserted whose effective axial wall thickness is somewhat greater than the depth of the annular groove (36) related to the annular surface (28, 30, 32), so that the annular element (38) protrudes slightly from the annular groove (36) and that in the annular element ( 38) there are a plurality of openings (48) provided at the same circumferential intervals, into which at least some easily rotatable rolling elements (50) can be inserted, the effective diameter of which is slightly larger than the effekti ve thickness of the ring element (38). Drehteller nach Anspruch 3, dadurch gekennzeichnet, daß die Gleitflächen (44, 46) an schmalen, deckseitig und bodenseitig vom Ringelement (38) vorstehenden Stegen (40, 42) ausgebildet sind.Turntable according to claim 3, characterized in that the sliding surfaces (44, 46) are formed on narrow webs (40, 42) which project from the ring element (38) on the top and bottom sides. Drehteller nach Anspruch 4, dadurch gekennzeichnet, daß die Stege (40, 42) in zwei Gruppen einander rechtwinklig kreuzender Steganordnungen orientiert sind, wobei jeweils ein Paar linear ausgerichteter Stege (40 bzw. 42) beider Gruppen radial zur Drehachse (40) der Drehplatte (12) angeordnet sind.Turntable according to claim 4, characterized in that the webs (40, 42) are oriented in two groups of web arrangements which cross at right angles, a pair of linear webs (40 or 42) of both groups being radial to the axis of rotation (40) of the rotary plate ( 12) are arranged. Drehteller nach einem der Ansprüche 3-5, dadurch gekennzeichnet, daß die Durchbrüche (48) länglich ausgebildet und radial angeordnet sind und die Drehachse jedes zylindrisch ausgebildeten Wälzkörpers (50) mit der Radialrichtung der Durchbrüche (48) zusammenfällt.Turntable according to one of claims 3-5, characterized in that the openings (48) are elongated and arranged radially and the axis of rotation of each cylindrical rolling element (50) coincides with the radial direction of the openings (48). Drehteller nach Anspruch 3-6, dadurch gekennzeichnet, daß die Durchbrüche (48) an einem Paar einander gegenüberliegender Oberränder und an einem Paar einander gegenüberliegender Unterränder jeweils Haltelappen (52, 54) aufweisen, die den jeweiligen Wälzkörper (50) oben und unten übergreifen und diesen am Herausfallen hindern und daß die Haltelappen (52, 54) an wenigstens einem Randpaar elastisch verformbar ausgebildet sind.Turntable according to claims 3-6, characterized in that the openings (48) on a pair of mutually opposite upper edges and on a pair of mutually opposite lower edges each have retaining tabs (52, 54) which overlap the respective rolling element (50) above and below and prevent it from falling out and that the retaining tabs (52, 54) are designed to be elastically deformable on at least one pair of edges. Drehteller nach einem der Ansprüche 3-7, dadurch gekennzeichnet, daß die Anzahl der Durchbrüche (48) geteilt durch die Zahl 2 eine ganze Zahl von mindestens 3 ergibt.Turntable according to one of claims 3-7, characterized in that the number of openings (48) divided by the number 2 results in an integer of at least 3. Drehteller nach einem der Ansprüche 3-8, dadurch gekennzeichnet, daß die Ringnut (36) in der Drehplatte (12) vorgesehen ist.Turntable according to one of claims 3-8, characterized in that the annular groove (36) is provided in the rotary plate (12). Drehteller nach einem der Ansprüche 3-8, dadurch gekennzeichnet, daß in der Drehplatte (12) und in der Bodenplatte (14) je eine Ringnut (36) gleichen Durchmessers und gleicher Breite ausgebildet ist und daß das Ringelement (38) in beide Ringnuten (36) eingreift und eine axiale Wandstärke geringfügig größer als die Summe der Tiefen beider Ringnuten (36) hat.Turntable according to one of claims 3-8, characterized in that an annular groove (36) of the same diameter and the same width is formed in the rotary plate (12) and in the base plate (14) and that the ring element (38) in both annular grooves ( 36) engages and has an axial wall thickness slightly greater than the sum of the depths of both ring grooves (36).
EP95109775A 1994-09-22 1995-06-23 Turning plate with sitting or standing-up surface for disabled persons Expired - Lifetime EP0702947B1 (en)

Applications Claiming Priority (2)

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DE4433853 1994-09-22
DE4433853A DE4433853A1 (en) 1994-09-22 1994-09-22 Turntable with stand or seat for the disabled

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EP0702947A1 true EP0702947A1 (en) 1996-03-27
EP0702947B1 EP0702947B1 (en) 1999-11-24

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JP (1) JPH08224277A (en)
AT (1) ATE186833T1 (en)
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Publication number Priority date Publication date Assignee Title
DE10038849C2 (en) * 2000-08-04 2003-11-27 Leonair Gmbh Device for tipping over, in particular disabled persons

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US2757388A (en) 1953-07-28 1956-08-07 Adamson Stephens Mfg Co Bedside transfer stand
US2905229A (en) 1955-11-08 1959-09-22 Raymond N Adams Rotary stool
GB2214424A (en) * 1988-01-28 1989-09-06 Alexander Feldmann Rotating seat device
DE3835532C1 (en) * 1988-10-19 1990-02-15 Peter 7989 Eisenharz De Schmidt

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CH254104A (en) * 1946-08-02 1948-04-15 Raez Ammann Ida Device for turning sick people on their bed.
DE1989528U (en) * 1968-04-22 1968-07-18 Fritz Zur Heide BASE FOR FURNITURE.
US3637185A (en) * 1969-05-21 1972-01-25 Seng Co The Self-orienting revolving fixture
CA2015353A1 (en) * 1989-12-04 1991-06-04 Dennis J. Gryp Swivel seat, especially for vehicles
US5078451A (en) * 1990-08-16 1992-01-07 Sobel David J Portable rotatable beach chaise lounge
US5281017A (en) * 1992-05-26 1994-01-25 Geiss Ii Michael J Wheelchair accessible desk/lift
US5311622A (en) * 1992-07-06 1994-05-17 Allen Roy H Patient handling device

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Publication number Priority date Publication date Assignee Title
US2757388A (en) 1953-07-28 1956-08-07 Adamson Stephens Mfg Co Bedside transfer stand
US2905229A (en) 1955-11-08 1959-09-22 Raymond N Adams Rotary stool
GB2214424A (en) * 1988-01-28 1989-09-06 Alexander Feldmann Rotating seat device
DE3835532C1 (en) * 1988-10-19 1990-02-15 Peter 7989 Eisenharz De Schmidt
US5000513A (en) 1988-10-19 1991-03-19 Peter Schmidt Rotary table

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EP0702947B1 (en) 1999-11-24
DE4433853A1 (en) 1996-03-28
JPH08224277A (en) 1996-09-03
DE59507282D1 (en) 1999-12-30
CA2158184A1 (en) 1996-03-23
ATE186833T1 (en) 1999-12-15

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