EP0100490B1 - Lifting device, especially for a dental chair - Google Patents

Lifting device, especially for a dental chair Download PDF

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Publication number
EP0100490B1
EP0100490B1 EP83107114A EP83107114A EP0100490B1 EP 0100490 B1 EP0100490 B1 EP 0100490B1 EP 83107114 A EP83107114 A EP 83107114A EP 83107114 A EP83107114 A EP 83107114A EP 0100490 B1 EP0100490 B1 EP 0100490B1
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EP
European Patent Office
Prior art keywords
lifting device
another
scissors arm
supporting
arms
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.)
Expired
Application number
EP83107114A
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German (de)
French (fr)
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EP0100490A3 (en
EP0100490A2 (en
Inventor
Klaus Stöckl
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of EP0100490A2 publication Critical patent/EP0100490A2/en
Publication of EP0100490A3 publication Critical patent/EP0100490A3/en
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Publication of EP0100490B1 publication Critical patent/EP0100490B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • 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
    • A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/02—Chairs with means to adjust position of patient; Controls therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0608—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement driven by screw or spindle

Definitions

  • the invention relates to a lifting device, in particular for a dental patient chair, with scissor-like support arms arranged between a base part and a height-adjustable support part and connected to one another by an axis, which are arranged in pairs parallel to one another at a distance and one end of which is at a fixed position Part, the other ends of the movable part of a horizontal guide, on the one hand of the base part and on the other hand of the height-adjustable support part, are articulated.
  • Such a lifting device is known for example from US-A 3522925.
  • the lifting device is designed there as a double scissor arm construction with double scissor arms arranged on both sides of the chair, each connected by joints.
  • Such a lifting device is structurally complex and has a relatively large number of bearing points, which, in order to obtain sufficient stability, have to be very precise and therefore complex in terms of production technology.
  • Another disadvantage is that the scissor arms cannot be folded extremely deep.
  • the aim of the present invention is to provide a simpler, yet sufficiently stable lifting device with a sufficiently high usable stroke length and an extremely low lowest position, the construction of which is intended to reduce the width of the support arm structure without impairing the stability.
  • one of the support arms arranged in pairs is shortened to the axle bearing and both support arms are connected to one another by a transverse stiffening and thus form a torsionally rigid structural unit such that the two Support arm assemblies are arranged reversely facing each other, and that the free end of the long support arm of each assembly is hinged to the horizontal guide, which is arranged for one assembly on the stationary base part and for the other on the height-adjustable support part.
  • the lifting device according to the invention is a very compact, very small construction which is sufficiently stable and can be used particularly advantageously as a height adjustment device in a dental patient chair.
  • the patient chair 1 shows a diagrammatic representation of a dental work station, consisting of a patient chair 1, a doctor's device 2 arranged on the patient's right as viewed from the patient and an assistant's device 3 arranged on the left of the patient's chair.
  • the patient chair 1 essentially consists of an upper part of the chair and a lower part of the chair .
  • the lower part of the chair contains a base part 4, in which a horizontal guide 5 for the doctor's device 2, which will be explained in more detail later, and electrical and / or pneumatic supply modules combined in a connection box 6 are arranged, as well as a height adjustment device for the seat and backrest, which is concealed by a bellows 7 existing chair upper part 8.
  • the device 3 is also adjustable by means of a horizontal guide 9 (Fig.2) parallel to the longitudinal axis of the chair, in contrast to the horizontal guide 5 for the medical device 2, the fixed base part 4 over the entire length of the chair, ie runs approximately from the rear edge of the seat to at least the foot end of the seat or to the right end of the connection box 6 in the illustration according to FIG. 1, the horizontal guide 9 for the assistant's device 3 on the height-adjustable chair upper beam 10 only runs over its length.
  • a horizontal guide 9 Fig.2
  • the fixed base part 4 over the entire length of the chair, ie runs approximately from the rear edge of the seat to at least the foot end of the seat or to the right end of the connection box 6 in the illustration according to FIG. 1, the horizontal guide 9 for the assistant's device 3 on the height-adjustable chair upper beam 10 only runs over its length.
  • FIG. 3 shows the structure of the lower chair part including upper chair part support 10 in an exploded view. The view is from the side from which FIG. 2 is to be viewed.
  • the base part 4 is essentially formed from a base plate 11 which is rectangular in plan and which accommodates all the load-bearing parts, in particular the height adjustment device designated by 60 and the support 10 for the chair upper part 8, and a frame surrounding the base plate 11, which in turn consists of two the shorter sides arranged end pieces 12 and formed on the longer sides trim parts 13 and profile elements 14 is formed.
  • the end pieces 12 are formed as corner profiles, that is to say they have end parts 12 a which are angled at right angles and encompass the shorter sides of the base plate 11 and into which elastic connecting elements 15 are inserted, to which the trim parts 13 or the profile elements 14 can be fastened.
  • the right end piece 12 shown in the figure contains a shoulder 16, on which the lower end of the bellows 7 is hung.
  • the end pieces 12 are screwed onto the base plate 11, for what purpose these mounting blocks 17 and 12 tabs 18 1 are arranged on the end pieces.
  • the full-surface covering parts 13 are cross-divided into a section 13a, which essentially corresponds to the length of the chair upper part carrier 10 or of the bellows 7 surrounding the height adjustment device, and a section 13b, which corresponds to the remaining length, essentially the length of the connection box 6.
  • a holding part 20 is arranged on the base plate 11 or on a bar 19 connected to it, adapted to the profile of the covering parts 13, onto which the covering parts 13a, 13b are pushed with their one ends for fixing before they are attached to theirs other ends are connected to the end pieces 12 by means of the elastic connecting elements 15.
  • the trim part 13a like the right end piece 12, also contains an extension 16, on which the bellows 7 is hung.
  • the transverse division is also present in the angle profiles 14; here, too, the individual parts are connected to one another by elastic connecting elements 15; the upper angle section 14a, like the covering part 13a, contains a corresponding extension 16 in order to be able to fasten the bellows 7.
  • a major advantage of the transverse division of the trim parts and angle profiles in the manner described can be seen in the fact that the same trim parts can be used for the trim of both the seat support and the base part, specifically for a chair construction with a short base part, e.g. without connection box, as well as with a long base part, e.g. with junction box.
  • the two angle profiles 14 form a slot 21, from which a connection or support part 22 projects, on which the support column 23 (FIG. 1), which is bent off at the bottom, can be fastened for the device 2.
  • the support part 22 is fixedly connected to a slide 24 which is guided within the base part 4 over the entire length of the slot 21 in the horizontal guide 5.
  • the slot 21 is covered in each position of the carriage 24 by a belt 25 hung on the carriage 24, which is guided as an endless belt over deflection rollers 26 approximately rectangular.
  • various supply lines 27 which are joined to form a flat band and which bring the media (air and / or water and / or electrical current) required in the device 2 from a central supply source in the connection box 6 to the support part 22.
  • the chair upper part carrier 10 also consists of a base plate 31 which is rectangular in plan and has the same width as the base plate 11 and a frame consisting on the one hand of end pieces 32 on both sides and on the other hand cladding parts 33 and angle profiles 34, which in turn are attached by means of corresponding elastic connecting elements 35 are attached to the end pieces.
  • a base plate 31 which is rectangular in plan and has the same width as the base plate 11
  • a frame consisting on the one hand of end pieces 32 on both sides and on the other hand cladding parts 33 and angle profiles 34, which in turn are attached by means of corresponding elastic connecting elements 35 are attached to the end pieces.
  • approaches 36 On the end pieces and on the angle profiles are approaches 36, on which the bellows 7 can be hung.
  • the end pieces 32 are identical to the end pieces 12, that is to say they have fastening tabs 38 in the same place and at the same height; the associated brackets 37 are provided in the base plate 31.
  • the trim parts 33 also have the same dimensions as the trim sections 13a, which among other things simplifies the storage of the parts and also makes it possible to exchange the parts with one another.
  • the right end piece 12 provided with a shoulder can be used from the base part 4 to cover the upper part carrier.
  • connection or support part 42 protrudes through the slot 41 formed by the two angle profiles 34, a connection or support part 42, to which the support column 43 (FIG. 2) of the device 3 is fastened either directly or via a support arm.
  • the slot is covered by a webbing 45.
  • Base parts 61 are formed on the base plate 11 of the base part 4, on which a box-shaped frame 62 which is open at the top and bottom is fastened.
  • a scissor arm construction formed from two parts 63, 64 is articulated on the one hand on the frame 62 and on the other hand on the chair upper part support 10.
  • the scissor arm parts 63, 64 have the same structure except for the pivot point of a drive which will be explained in more detail later, i.e. they each form a long support arm 63a, 64a, a shorter support arm 63b, 64b and a transverse stiffener 63c, 64c in between.
  • the shorter support arm 63b, 64b has approximately half the length of the longer support arm 63a, 64a and is guided in a common axle bearing 65.
  • the ends 66 of the parallel support arms 63a, 63b, which end at the same height, are mounted on the upper chair support 10; the free end 67 of the longer support arm 63a is articulated to a bush 68 which, together with a guide rod 69 attached to the frame 62, forms a horizontal guide.
  • the two scissor arm parts 63 and 64 are arranged relative to one another in such a way that the legs of the U-shaped support arms face one another.
  • the two scissor arm parts can thus be arranged horizontally in the lowest position (FIG. 6).
  • the interlocking of the scissor arm parts would make an even lower end position possible if this were necessary due to certain design requirements.
  • the design of the lifting device in the manner described makes it possible to make the entire lifting device extremely narrow, as a result of which more space is created to the side of the scissor arm parts compared to other designs.
  • Another advantage is that sufficient storage space is provided below the scissor arms, which are in the lowest position for the supply lines.
  • Base part 4 and upper chair part 10 form on each side of the height adjustment device 60 a space 78 and 79, respectively, which serves as a cable duct for the cables 27 and 28.
  • This space extends parallel to the longitudinal axis of the chair and is on the one hand through the base and frame parts 61, 62 and on the other hand limited by the bellows 7.
  • the supply lines 27, 28 are combined in the manner of a ribbon cable and laid in the cable ducts 78, 79 to form a loop 50 so that they can follow the movement of the devices.
  • One end of the lines ends in the carriage 24 or 44, thus moving along the guideway, the other end opens in the connection box 6.
  • the length of the lines there is dimensioned such that they are still adequately guided in the respective end positions within the cable duct.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Chairs Characterized By Structure (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Description

Die Erfindung bezieht sich auf eine Hubvorrichtung, insbesondere für einen zahnärztlichen Patientenstuhl, mit zwischen einem Basisteil und einem höhenverstellbaren Tragteil scherenartig angeordneten und durch eine Achse miteinander verbundenen Tragarmen, die paarweise parallel zueinander in einem Abstand angeordnet sind und von denen die einen Enden an einem ortsfesten Teil, die anderen Enden am beweglichen Teil einer Horizontalführung, einerseits des Basisteils und andererseits des höhenverstellbaren Tragteils, angelenkt sind.The invention relates to a lifting device, in particular for a dental patient chair, with scissor-like support arms arranged between a base part and a height-adjustable support part and connected to one another by an axis, which are arranged in pairs parallel to one another at a distance and one end of which is at a fixed position Part, the other ends of the movable part of a horizontal guide, on the one hand of the base part and on the other hand of the height-adjustable support part, are articulated.

Eine solche Hubvorrichtung ist beispielsweise aus der US-A 3522925 bekannt. Die Hubvorrichtung ist dort allerdings als Doppelscherenarmkonstruktion mit beidseitig des Stuhles angeordneten, jeweils durch Gelenke miteinander verbundenen Doppelscherenarmen ausgebildet.Such a lifting device is known for example from US-A 3522925. However, the lifting device is designed there as a double scissor arm construction with double scissor arms arranged on both sides of the chair, each connected by joints.

Eine solche Hubvorrichtung ist konstruktiv aufwendig und weist relativ viele Lagerstellen auf, die, um eine ausreichende Stabilität zu bekommen, sehr präzise und damit fertigungstechnisch aufwendig ausgeführt sein müssen. Ein weiterer Nachteil ist darin zu sehen, dass die Scherenarme nicht extrem tief zusammenklappbar sind.Such a lifting device is structurally complex and has a relatively large number of bearing points, which, in order to obtain sufficient stability, have to be very precise and therefore complex in terms of production technology. Another disadvantage is that the scissor arms cannot be folded extremely deep.

Ziel der vorliegenden Erfindung ist es, eine demgegenüber einfachere, dennoch ausreichend stabile Hubvorrichtung mit ausreichend hohem nutzbaren Hubweg und einer extrem niedrigen Tiefststellung zu schaffen, wobei aufgrund der Konstruktion eine Verkleinerung der Breite der Tragarmkonstruktion ohne Beeinträchtigung der Stabilität angestrebt werden soll.The aim of the present invention is to provide a simpler, yet sufficiently stable lifting device with a sufficiently high usable stroke length and an extremely low lowest position, the construction of which is intended to reduce the width of the support arm structure without impairing the stability.

Zur Erreichung dieses Ziels wird bei einer Vorrichtung der eingangs genannten Art gemäss der Erfindung vorgeschlagen, dass von den paarweise angeordneten Tragarmen der eine bis zurAchslagerung gekürzt ist und beide Tragarme durch eine Querversteifung miteinander verbunden sind und so eine in sich verwindungssteife Baueinheit bilden, dass die beiden Tragarmbaueinheiten seitenverkehrt einander zugekehrt angeordnet sind, und dass das freie Ende des langen Tragarmes einer jeden Baueinheit an der Horizontalführung angelenkt ist, welche für die eine Baueinheit am ortsfesten Basisteil und für die andere am höhenverstellbaren Tragteil angeordnet ist.To achieve this goal, it is proposed in a device of the type mentioned at the outset according to the invention that one of the support arms arranged in pairs is shortened to the axle bearing and both support arms are connected to one another by a transverse stiffening and thus form a torsionally rigid structural unit such that the two Support arm assemblies are arranged reversely facing each other, and that the free end of the long support arm of each assembly is hinged to the horizontal guide, which is arranged for one assembly on the stationary base part and for the other on the height-adjustable support part.

Die erfindungsgemässe Hubvorrichtung stellt eine sehr kompakte, in ihrer Breite sehr kleine Konstruktion dar, die ausreichend stabil und besonders vorteilhaft als Höhenverstelleinrichtung bei einem zahnärztlichen Patientenstuhl anwendbar ist.The lifting device according to the invention is a very compact, very small construction which is sufficiently stable and can be used particularly advantageously as a height adjustment device in a dental patient chair.

Vorteilhafte Ausgestaltungen und Weiterbildungen sind in den Unteransprüchen enthalten.Advantageous refinements and developments are contained in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 einen zahnärztlichen Arbeitsplatz in einer schaubildlichen vereinfachten Darstellung,
  • Fig. den Arbeitsplatz nach Fig. von der gegenüberliegenden Seite aus betrachtet,
  • Fig. den Aufbau des Stuhlunterteils mit der Hubvorrichtung in einer Explosionsdarstellung,
  • Fig.4 einen Teil der Hubvorrichtung in schaubildlicherAnsicht,
  • Fig. 5 einen Querschnitt vom Stuhlunterteil,
  • Fig. 6 und 7 eine Seitenansicht der Vorrichtung einerseits in einer unteren (Tiefstlage), andererseits in einer oberen Endlage.
An embodiment of the invention is explained in more detail with reference to the drawing. Show it:
  • 1 shows a dental workplace in a diagrammatic simplified representation,
  • Fig. The workplace according to Fig. Viewed from the opposite side,
  • 1 shows the structure of the lower part of the chair with the lifting device in an exploded view,
  • 4 a part of the lifting device in a diagrammatic view,
  • 5 shows a cross section of the lower part of the chair,
  • 6 and 7 a side view of the device on the one hand in a lower (lowest position), on the other hand in an upper end position.

Die Fig. 1 zeigt in einer schaubildlichen Darstellung einen zahnärztlichen Arbeitsplatz, bestehend aus einem Patientenstuhl 1, einem vom Patienten aus betrachtet rechts davon angeordneten Arztgerät 2 und einem links des Patientenstuhles angeordneten Hilferinnengerät 3. Der Patientenstuhl 1 besteht im wesentlichen aus einem Stuhloberteil und einem Stuhlunterteil. DasStuhlunterteil enthält ein Basisteil 4, in dem eine später noch näher erläuterte Horizontalführung 5 für das Arztgerät 2 und in einem Anschlusskasten 6 zusammengefasste elektrische und/oder pneumatische Versorgungsbausteine angeordnet sind, sowie eine durch einen Faltenbalg 7 verdeckt angeordnete Höhenverstellvorrichtung für das aus Sitz- und Rückenlehne bestehende Stuhloberteil 8. Das Gerät 3 ist ebenfalls mittels einer Horizontalführung 9 (Fig.2) parallel zur Längsachse des Stuhles verstellbar gehaltert, wobei im Gegensatz zur Horizontalführung 5 für das Arztgerät 2, die am ortsfesten Basisteil 4 über die gesamte Länge des Stuhles, also etwa von der hinteren Sitzkante bis mindestens zum Fussende des Sitzes bzw. bis zum in der Darstellung nach Fig. 1 rechten Ende des Anschlusskastens 6 verläuft, die Horizontalführung 9 für das Helferinnengerät 3 am höhenverstellbaren Stuhloberteilträger 10 lediglich über dessen Länge verläuft.1 shows a diagrammatic representation of a dental work station, consisting of a patient chair 1, a doctor's device 2 arranged on the patient's right as viewed from the patient and an assistant's device 3 arranged on the left of the patient's chair. The patient chair 1 essentially consists of an upper part of the chair and a lower part of the chair . The lower part of the chair contains a base part 4, in which a horizontal guide 5 for the doctor's device 2, which will be explained in more detail later, and electrical and / or pneumatic supply modules combined in a connection box 6 are arranged, as well as a height adjustment device for the seat and backrest, which is concealed by a bellows 7 existing chair upper part 8. The device 3 is also adjustable by means of a horizontal guide 9 (Fig.2) parallel to the longitudinal axis of the chair, in contrast to the horizontal guide 5 for the medical device 2, the fixed base part 4 over the entire length of the chair, ie runs approximately from the rear edge of the seat to at least the foot end of the seat or to the right end of the connection box 6 in the illustration according to FIG. 1, the horizontal guide 9 for the assistant's device 3 on the height-adjustable chair upper beam 10 only runs over its length.

Die Fig. 3 zeigt den Aufbau des Stuhlunterteils einschliesslich Stuhloberteilträger 10 in einer Explosionsdarstellung. Die Ansicht erfolgt von der Seite aus, aus der die Fig. 2 zu betrachten ist.3 shows the structure of the lower chair part including upper chair part support 10 in an exploded view. The view is from the side from which FIG. 2 is to be viewed.

Das Basisteil 4 wird im wesentlichen gebildet aus einer im Grundriss rechteckigen Grundplatte 11, welche sämtliche tragenden Teile, insbesondere die mit 60 bezeichnete Höhenverstelleinrichtung und den Träger 10 für das Stuhloberteil 8, aufnimmt, und einen die Grundplatte 11 umgebenden Rahmen, der wiederum aus zwei an den kürzeren Seiten angeordneten Endstücken 12 und aus an den längeren Seiten angeordneten Verkleidungsteilen 13 sowie Profilelementen 14 gebildet ist. Die Endstücke 12 sind als Eckprofile ausgebildet, d.h. sie weisen rechtwinklig abgewinkelte, die kürzeren Seiten der Grundplatte 11 umgreifende Endteile 12a auf, in die elastische Verbindungselemente 15 eingesteckt werden, an denen die Verkleidungsteile 13 bzw. die Profilelemente 14 befestigt werden können. Das in der Figur dargestellte rechte Endstück 12 enthält einen Ansatz 16, an dem das untere Ende des Faltenbalgs 7 eingehängt wird. Die Endstücke 12 sind an der Grundplatte 11 angeschraubt, wozu an dieser Befestigungsblöcke 17 und an den Endstücken 12 Laschen 181 angeordnet sind.The base part 4 is essentially formed from a base plate 11 which is rectangular in plan and which accommodates all the load-bearing parts, in particular the height adjustment device designated by 60 and the support 10 for the chair upper part 8, and a frame surrounding the base plate 11, which in turn consists of two the shorter sides arranged end pieces 12 and formed on the longer sides trim parts 13 and profile elements 14 is formed. The end pieces 12 are formed as corner profiles, that is to say they have end parts 12 a which are angled at right angles and encompass the shorter sides of the base plate 11 and into which elastic connecting elements 15 are inserted, to which the trim parts 13 or the profile elements 14 can be fastened. The right end piece 12 shown in the figure contains a shoulder 16, on which the lower end of the bellows 7 is hung. The end pieces 12 are screwed onto the base plate 11, for what purpose these mounting blocks 17 and 12 tabs 18 1 are arranged on the end pieces.

Die vollflächig ausgebildeten Verkleidungsteile 13 sind quergeteilt in einen Abschnitt 13a, der im wesentlichen der Länge des Stuhloberteilträgers 10 bzw. des die Höhenverstellvorrichtung umschliessenden Faltenbalgs 7 entspricht, und einem Abschnitt 13b, der der restlichen Länge, im wesentlichen der Länge des Anschlusskastens 6, entspricht. An der Teilungsstelle ist ein an der Grundplatte 11 bzw. an einer mit dieser verbundenen Leiste 19 befestigtes, dem Profil der Verkleidungsteile 13 angepasstes Halteteil 20 angeordnet, auf das die Verkleidungsteile 13a, 13b mit ihren einen Enden zur Fixierung aufgeschoben werden, bevor sie an ihren anderen Enden mittels der elastischen Verbindungselemente 15 mit den Endstücken 12 verbunden werden. Das Verkleidungsteil 13a enthält, wie das rechte Endstück 12, ebenfalls einen Ansatz 16, an dem der Faltenbalg 7 eingehängt wird. Die Querteilung ist auch bei den Winkelprofilen 14 vorhanden; auch hier sind die einzelnen Teile durch elastische Verbindungselemente 15 miteinander verbunden; das obere Winkelprofil 14a enthält, wie das Verkleidungsteil 13a, einen entsprechenden Ansatz 16, um den Faltenbalg 7 befestigen zu können.The full-surface covering parts 13 are cross-divided into a section 13a, which essentially corresponds to the length of the chair upper part carrier 10 or of the bellows 7 surrounding the height adjustment device, and a section 13b, which corresponds to the remaining length, essentially the length of the connection box 6. At the division point, a holding part 20 is arranged on the base plate 11 or on a bar 19 connected to it, adapted to the profile of the covering parts 13, onto which the covering parts 13a, 13b are pushed with their one ends for fixing before they are attached to theirs other ends are connected to the end pieces 12 by means of the elastic connecting elements 15. The trim part 13a, like the right end piece 12, also contains an extension 16, on which the bellows 7 is hung. The transverse division is also present in the angle profiles 14; here, too, the individual parts are connected to one another by elastic connecting elements 15; the upper angle section 14a, like the covering part 13a, contains a corresponding extension 16 in order to be able to fasten the bellows 7.

Ein wesentlicher Vorteil der Querteilung der Verkleidungsteile und Winkelprofile in der beschriebenen Weise ist darin zu sehen, dass gleiche Verkleidungsteile für die Verkleidung sowohl des Sitzträgers als auch des Basisteils verwendet werden können, und zwar für eine Stuhlkonstruktion sowohl mit kurzem Basisteil, z.B. ohne Anschlusskasten, als auch mit langem Basisteil, z.B. mit Anschlusskasten.A major advantage of the transverse division of the trim parts and angle profiles in the manner described can be seen in the fact that the same trim parts can be used for the trim of both the seat support and the base part, specifically for a chair construction with a short base part, e.g. without connection box, as well as with a long base part, e.g. with junction box.

Die beiden Winkelprofile 14 bilden über ihre gesamte Länge einen Schlitz 21, aus dem ein Anschluss- oder Tragteil 22 vorsteht, an dem die unten abgekröpfte Tragsäule 23 (Fig. 1) für das Gerät 2 befestigbar ist. Das Tragteil 22 ist mit einem Schlitten 24, der innerhalb des Basisteils 4 über die gesamte Länge des Schlitzes 21 in der Horizontalführung 5 geführt ist, fest verbunden.Over their entire length, the two angle profiles 14 form a slot 21, from which a connection or support part 22 projects, on which the support column 23 (FIG. 1), which is bent off at the bottom, can be fastened for the device 2. The support part 22 is fixedly connected to a slide 24 which is guided within the base part 4 over the entire length of the slot 21 in the horizontal guide 5.

Der Schlitz 21 wird in jeder Stellung des Schlittens 24 durch ein am Schlitten 24 eingehängtes Gurtband 25 abgedeckt, welches als Endlosband über Umlenkrollen 26 etwa rechteckig geführt ist. In den Schlitten 24 münden ferner diverse, zu einem flachen Band zusammengefügte Versorgungsleitungen 27, welche die im Gerät 2 benötigten Medien (Luft und/oder Wasser und/oder elektrischer Strom) von einer zentralen Versorgungsquelle im Anschlusskasten 6 an das Tragteil 22 heranführen.The slot 21 is covered in each position of the carriage 24 by a belt 25 hung on the carriage 24, which is guided as an endless belt over deflection rollers 26 approximately rectangular. In the carriage 24 also open various supply lines 27 which are joined to form a flat band and which bring the media (air and / or water and / or electrical current) required in the device 2 from a central supply source in the connection box 6 to the support part 22.

Entsprechend dem Aufbau des Basisteils 4 besteht auch der Stuhloberteilträger 10 aus einer im Grundriss rechteckigen Grundplatte 31 gleicher Breite wie die Grundplatte 11 und einem Rahmen, bestehend einerseits aus beidseitigen Endstükken 32 und andererseits Verkleidungsteilen 33 sowie Winkelprofilen 34, die wiederum mittels entsprechender elastischer Verbindungselemente 35 an den Endstücken befestigt sind. An den Endstücken und an den Winkelprofilen sind Ansätze 36 vorhanden, an denen der Faltenbalg 7 eingehängt werden kann.Corresponding to the structure of the base part 4, the chair upper part carrier 10 also consists of a base plate 31 which is rectangular in plan and has the same width as the base plate 11 and a frame consisting on the one hand of end pieces 32 on both sides and on the other hand cladding parts 33 and angle profiles 34, which in turn are attached by means of corresponding elastic connecting elements 35 are attached to the end pieces. On the end pieces and on the angle profiles are approaches 36, on which the bellows 7 can be hung.

Die Endstücke 32 sind identisch mit den Endstücken 12, weisen also an gleicher Stelle und in gleicher Höhe Befestigungslaschen 38 auf; die zugehörigen Halterungen 37 sind in der Grundplatte 31 vorgesehen. Auch die Verkleidungsteile 33 haben gleiche Abmessungen wie die Verkleidungsabschnitte 13a, wodurch unter anderem die Lagerhaltung der Teile vereinfacht wird und auch ein Austausch der Teile untereinander möglich ist. So kann beispielsweise das mit einem Ansatz versehene rechte Endstück 12 vom Basisteil 4 zur Verkleidung des Oberteilträgers verwendet werden.The end pieces 32 are identical to the end pieces 12, that is to say they have fastening tabs 38 in the same place and at the same height; the associated brackets 37 are provided in the base plate 31. The trim parts 33 also have the same dimensions as the trim sections 13a, which among other things simplifies the storage of the parts and also makes it possible to exchange the parts with one another. For example, the right end piece 12 provided with a shoulder can be used from the base part 4 to cover the upper part carrier.

Auch hier ragt durch den durch die beiden Winkelprofile 34 gebildeten Schlitz 41 ein Anschluss- oder Tragteil 42, an dem entweder direkt oder über einen Tragarm die Tragsäule 43 (Fig. 2) des Gerätes 3 befestigt ist. Der Schlitz wird, wie beim Basisteil 4, durch ein Gurtband 45 abgedeckt.Also here protrudes through the slot 41 formed by the two angle profiles 34, a connection or support part 42, to which the support column 43 (FIG. 2) of the device 3 is fastened either directly or via a support arm. As with the base part 4, the slot is covered by a webbing 45.

Anhand der Fig. 3 und der nachfolgenden Figuren wird der Aufbau der Hubvorrichtung zur Verstellung des Stuhloberteils näher erläutert.The structure of the lifting device for adjusting the upper part of the chair is explained in more detail with reference to FIG. 3 and the following figures.

An der Grundplatte 11 des Basisteils 4 sind Sockelteile 61 angeformt, auf denen ein kastenförmiger, nach oben und unten offener Rahmen 62 befestigt ist. Eine aus zwei Teilen 63, 64 gebildete Scherenarmkonstruktion ist einerseits am Rahmen 62 und andererseits am Stuhloberteilträger 10 angelenkt.Base parts 61 are formed on the base plate 11 of the base part 4, on which a box-shaped frame 62 which is open at the top and bottom is fastened. A scissor arm construction formed from two parts 63, 64 is articulated on the one hand on the frame 62 and on the other hand on the chair upper part support 10.

Die Scherenarmteile 63, 64 sind bis auf den Anlenkpunkt eines später noch näher erläuterten Antriebs gleich aufgebaut, d.h. sie bilden jeweils einen langen Tragarm 63a, 64a, einen demgegenüber kürzeren Tragarm 63b, 64b und eine dazwischen liegende Querversteifung 63c, 64c. Der kürzere Tragarm 63b, 64b hat etwa die halbe Länge des längeren Tragarmes 63a, 64a und ist in einer gemeinsamen Achslagerung 65 geführt. Die auf gleicher Höhe auslaufenden Enden 66 der parallel verlaufenden Tragarme 63a, 63b sind am Stuhloberteilträger 10 gelagert; das freie Ende 67 des längeren Tragarmes 63a ist an einer Buchse 68 angelenkt, die zusammen mit einer am Rahmen 62 befestigten Führungsstange 69 eine Horizontalführung bildet.The scissor arm parts 63, 64 have the same structure except for the pivot point of a drive which will be explained in more detail later, i.e. they each form a long support arm 63a, 64a, a shorter support arm 63b, 64b and a transverse stiffener 63c, 64c in between. The shorter support arm 63b, 64b has approximately half the length of the longer support arm 63a, 64a and is guided in a common axle bearing 65. The ends 66 of the parallel support arms 63a, 63b, which end at the same height, are mounted on the upper chair support 10; the free end 67 of the longer support arm 63a is articulated to a bush 68 which, together with a guide rod 69 attached to the frame 62, forms a horizontal guide.

Entsprechendes gilt für den Scherenarmteil 64, dessen freies Ende 70 an einer Buchse 71 angelenkt ist, die durch eine am Stuhloberteilträger 10 befestigte Führungsstange 72 geführt ist. Am Scherenarmteil 64 sind Halterungs- und Lagerteile 73 angeordnet für eine Spindelmutter 74, die Teil eines Spindelantriebes ist, dessen Antriebsmotor 75 an der Grundplatte 11 befestigt ist und deren Spindel 76 durch den Rahmen 62 hindurchgreift.The same applies to the scissor arm part 64, the free end 70 of which is articulated to a bushing 71 which is guided by a guide rod 72 fastened to the chair upper part support 10. On the scissor arm part 64, mounting and bearing parts 73 are arranged for a spindle nut 74 which is part of a spindle drive, the drive motor 75 of which is fastened to the base plate 11 and the spindle 76 which engages through the frame 62.

Die Fig. 4 zeigt den Scherenarmteil 64 von der Rückseite; aus der Darstellung ist ersichtlich, dass sowohl der Scherenarmteil 64 als solcher, als auch der lange Tragarm 64a im Querschnitt U-förmig ausgebildet sind und dazwischen diagonal verlaufende und sich überkreuzende Versteifungsrippen 77 vorgesehen sind. Die gesamte Scherenarmkonstruktion ist dadurch äusserst verwindungssteif.4 shows the scissor arm part 64 from the rear; From the illustration it can be seen that both the scissor arm part 64 as such and the long support arm 64a are U-shaped in cross-section and stiffening ribs 77 which run diagonally and intersect between them are provided. The whole This makes the scissor arm construction extremely torsion-resistant.

Wie aus den Fig. 3 und 5 ersichtlich ist, sind die beiden Scherenarmteile 63 und 64 zueinander so angeordnet, dass die Schenkel der U-förmigen Tragarme einander zugewandt sind. Die beiden Scherenarmteile können so in der Tiefstlage (Fig. 6) waagrecht angeordnet sein. Durch das Ineinandergreifen der Scherenarmteile wäre sogar eine noch tiefere Endlage möglich, wenn dies aus bestimmten konstruktiven Erfordernissen notwendig wäre.As can be seen from FIGS. 3 and 5, the two scissor arm parts 63 and 64 are arranged relative to one another in such a way that the legs of the U-shaped support arms face one another. The two scissor arm parts can thus be arranged horizontally in the lowest position (FIG. 6). The interlocking of the scissor arm parts would make an even lower end position possible if this were necessary due to certain design requirements.

Die Ausbildung der Hubvorrichtung in der geschilderten Weise macht es möglich, die gesamte Hubvorrichtung extrem schmal zu bauen, wodurch im Vergleich zu anderen Konstruktionen seitlich der Scherenarmteile mehr Platz geschaffen wird.The design of the lifting device in the manner described makes it possible to make the entire lifting device extremely narrow, as a result of which more space is created to the side of the scissor arm parts compared to other designs.

Ein weiterer Vorzug ist, dass unterhalb der in der Tiefststellung waagrecht liegenden Scherenarme genügend Stauraum für die Unterbringung der Versorgungsleitungen gebildet wird.Another advantage is that sufficient storage space is provided below the scissor arms, which are in the lowest position for the supply lines.

Basisteil 4 und Stuhloberteilträger 10 bilden zu beiden Seiten der Höhenverstelleinrichtung 60 jeweils einen als Kabelschacht für die Kabel 27 und 28 dienenden Freiraum 78 bzw. 79. Dieser Freiraum erstreckt sich parallel zur Längsachse des Stuhles und ist einerseits durch die Sockel-und Rahmenteile 61, 62 und andererseits durch den Faltenbalg 7 begrenzt. Die Versorgungsleitungen 27, 28 sind nach Art eines Flachbandkabels zusammengefasst und in den Kabelschächten 78, 79 unter Bildung einer Schlaufe 50 verlegt, dass sie der Bewegung der Geräte folgen können. Das eine Ende der Leitungen mündet jeweils in den Schlitten 24 bzw. 44, bewegt sich also längs der Führungsbahn mit, das andere Ende mündet in den Anschlusskasten 6. Nachdem die Versorgungsleitungen 28 für das Helferinnengerät 3 im Gegensatz zu den Leitungen 27 neben der hin- und hergehenden Bewegung auch noch die Höhenverstellbewegung des Stuhloberteilträgers 10 mitmachen müssen, ist die Länge der Leitungen dort so bemessen, dass sie in den jeweiligen Endstellungen innerhalb des Kabelschachtes noch ausreichend geführt sind.Base part 4 and upper chair part 10 form on each side of the height adjustment device 60 a space 78 and 79, respectively, which serves as a cable duct for the cables 27 and 28. This space extends parallel to the longitudinal axis of the chair and is on the one hand through the base and frame parts 61, 62 and on the other hand limited by the bellows 7. The supply lines 27, 28 are combined in the manner of a ribbon cable and laid in the cable ducts 78, 79 to form a loop 50 so that they can follow the movement of the devices. One end of the lines ends in the carriage 24 or 44, thus moving along the guideway, the other end opens in the connection box 6. After the supply lines 28 for the assistant's device 3, in contrast to the lines 27, next to the and the associated movement must also participate in the height adjustment movement of the chair upper part support 10, the length of the lines there is dimensioned such that they are still adequately guided in the respective end positions within the cable duct.

Claims (7)

1. A lifting device, in particular for a dental chair, comprising supporting arms (63a, 63b; 64a, 64b) which are arranged in scissors manner between a base part (4) and a supporting part (10) which is vertically adjustable with respect thereto, which supporting arms are connected to one another by an axle (65) and are arranged parallel to one another in pairs spaced from one another, the one ends of said arms being articulated to a stationary part (62) and the other ends being articulated to the movable part (68, 71) of a horizontal guide (68, 69; 71, 72) of the base part (4), on the one hand, and of the vertically adjustable supporting part (10), on the other hand, characterised in that of the supporting arms (63a, 63b; 64a, 64b) arranged in pairs, the one (63b, 64b) only extends to the axle bearing (65) and both arms (63a, 63b; 64a, 64b) are connected to one another by means of a transverse reinforcement (63c, 64c) and thus form a structural unit which is resistant to distortion in itself; that the two scissors arm parts (63, 64) are arranged so as to face one another in laterally reversed manner, and that the free end (67, 70) of the long supporting arm (63a, 64a) of each scissors arm part (63, 64) is articulated to the horizontal guide (68, 69; 70, 71) which is arranged on the stationary base part (4) for the scissors arm part (63) and on the vertically adjustable supporting part (10) for the other scissors arm part (64).
2. A lifting device as claimed in Claim 1, characterised in that the two scissors arm parts (63, 64) have a closed transverse reinforcement (63c, 64c).
3. A lifting device as claimed in Claim 2, characterised in that the transverse reinforcement (63c, 64c) has diagonal ribs (77) which intersect one another.
4. A lifting device as claimed in one of Claims 1 to 3, characterised in that the supporting arms of each scissors arm part (63, 64) have a U-shaped cross-section and are arranged between the base component (4) and the supporting component (10) with their flanks facing one another.
5. A lifting device as claimed in one of Claims 1 to 4, characterised in that the two scissors arm parts (63, 64) have the same construction.
6. A lifting device as claimed in one of Claims 1 to 5, characterised in that the scissors arm parts (63, 64) are articulated to a box-shaped frame (62) which is secured to a base plate (11) of the base part (4).
7. A lifting device as claimed in Claim 6, characterised in that a spindle drive (74 to 76), whose spindle (76) passes through the frame (62), is positioned on the one scissors arm part (64).
EP83107114A 1982-08-02 1983-07-20 Lifting device, especially for a dental chair Expired EP0100490B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823228834 DE3228834A1 (en) 1982-08-02 1982-08-02 LIFTING DEVICE FOR IN PARTICULAR A DENTAL PATIENT CHAIR
DE3228834 1982-08-02

Publications (3)

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EP0100490A2 EP0100490A2 (en) 1984-02-15
EP0100490A3 EP0100490A3 (en) 1984-12-27
EP0100490B1 true EP0100490B1 (en) 1986-10-29

Family

ID=6169937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107114A Expired EP0100490B1 (en) 1982-08-02 1983-07-20 Lifting device, especially for a dental chair

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US (1) US4533106A (en)
EP (1) EP0100490B1 (en)
JP (1) JPS5948395A (en)
DE (2) DE3228834A1 (en)

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Also Published As

Publication number Publication date
JPS5948395A (en) 1984-03-19
JPH0567559B2 (en) 1993-09-27
EP0100490A3 (en) 1984-12-27
DE3367161D1 (en) 1986-12-04
EP0100490A2 (en) 1984-02-15
US4533106A (en) 1985-08-06
DE3228834A1 (en) 1984-02-02

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