EP0505847A1 - Lifting device - Google Patents

Lifting device Download PDF

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Publication number
EP0505847A1
EP0505847A1 EP92104351A EP92104351A EP0505847A1 EP 0505847 A1 EP0505847 A1 EP 0505847A1 EP 92104351 A EP92104351 A EP 92104351A EP 92104351 A EP92104351 A EP 92104351A EP 0505847 A1 EP0505847 A1 EP 0505847A1
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EP
European Patent Office
Prior art keywords
lifting device
low
direct current
voltage direct
lifting
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
EP92104351A
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German (de)
French (fr)
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EP0505847B1 (en
Inventor
Eckhart Dipl.-Ing. Dewert
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Dewert Antriebs und Systemtechnik GmbH and Co KG
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Dewert Antriebs und Systemtechnik GmbH and Co KG
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Publication of EP0505847A1 publication Critical patent/EP0505847A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/008—Use of remote controls
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
    • A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/041—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by electric motors
    • 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

Definitions

  • the present invention relates to a lifting device for pivoting furniture parts of a piece of furniture.
  • the lifting device in question is designed in particular for pivoting the head and / or foot part of a slatted frame.
  • Many designs of fittings are known for pivoting these furniture parts. These fittings are provided with locking teeth and a support lever which engages in a corresponding detent depending on the angle of inclination. Depending on the distance between the detents, there are corresponding jumps between the individual angles of inclination.
  • the known fittings are therefore not suitable for a continuous adjustment of the furniture parts to be pivoted. In addition, the furniture parts can only be pivoted manually.
  • the present invention has for its object to provide a lifting device with which furniture equipped with pivotable furniture parts can be retrofitted. Furthermore, the lifting device should be easy to use and the furniture part to be adjusted should be stepless be adjustable. In addition, the furniture part to be pivoted should be able to be pivoted back into the extended position from any angular position.
  • a lifting shear that can be actuated by a low-voltage direct-current geared motor, the output member of which is designed as a rotationally drivable internal threaded nut and by a fixed threaded spindle on which the low-voltage direct-current geared motor can be moved.
  • the lifting device according to the invention enables a stepless adjustment of the pivotable furniture part, due to the interaction of the lifting shears with the low-voltage direct current geared motor.
  • the adjustment is extremely convenient since only the gear motor has to be switched on.
  • the ends of the scissor arms of the lifting shears can be attached to the components of the furniture part to be pivoted by means of suitable components. Since the low-voltage direct current geared motor is a reversible motor, the furniture part to be pivoted can be pivoted out of any angular position into an extended or flat position.
  • the lifting device according to the invention is also suitable for self-installation.
  • the definition of the low-voltage DC geared motor and the threaded spindle is particularly easy if the lifting shears have a fixed and a continuously adjustable spar, and that the ends of one side of the scissor arms of the lifting shears are rotatably mounted on the two spars, and if each opposite end of the scissor arms on the associated spar is slidably guided.
  • the lifting device can be attached particularly easily when retrofitting furniture. Since the low-voltage DC geared motor moves on the threaded spindle after being switched on and thereby actuates the lifting shears via suitable connecting parts, it is particularly advantageous in terms of design if the fixed threaded spindle is parallel and at a certain distance from the spar of the lifting shears.
  • the setting of the threaded spindle is particularly simple if it carries a fork head at one end, to which an angle lever fixed on a scissor arm is articulated, and that the low-voltage direct current geared motor is arranged in the opposite region of the stationary spindle.
  • the low-voltage direct current geared motor is expediently mounted in a fork, which has a boom attached to a scissor arm. This creates favorable conditions for power transmission to the scissor arm during the movement of the low-voltage direct current geared motor, since the boom is fastened in the region of one end of the associated scissor arm.
  • An assembly and maintenance-friendly design is achieved if the fork head is formed from two interconnected levers that are cranked accordingly.
  • the slatted frame 10 shown in FIG. 1 has a head part 11 which can be pivoted about the horizontal axis.
  • This head part 11 can be pivoted by the lifting device 12 shown in FIG. 2.
  • the piece of slatted frame extending from the head part 11 to the end on the foot side can also be pivoted about a horizontal axis in the exemplary embodiment shown.
  • the lifting device 12 includes lifting scissors, which essentially consists of two scissor arms 13, 14 and two bars 15, 16.
  • the left ends of the scissor arms 13, 14 in the illustration are rotatably mounted on the bars 15, 16.
  • the bearings are in the end areas.
  • the opposite ends of the scissor arms 13, 14 are rotatably mounted on sliders 17, 18.
  • the lifting device 12 also includes a threaded spindle 19 which runs parallel and at a distance from the bars 15, 16 and on which a low-voltage direct current geared motor is placed. The threaded spindle 19 is held non-rotatably.
  • the lifting device also contains a power supply unit 21 so that the lifting device 12 can be supplied with power from the usual network.
  • the power supply 21 generates the required rectified low voltage from the mains voltage.
  • the power supply to the low-voltage direct current geared motor takes place via a standard cable.
  • a hand switch 22 is provided in the exemplary embodiment shown, which is not explained in detail since switches of this type are known.
  • the two scissor arms 13, 14 are rotatably mounted on a scissor pin 23 which is arranged centrally.
  • the lower bar 16 is assigned to the cross bar of the frame, the upper bar 15 to the outer cross bar of the adjustable head part 11. In relation to the installation position, the spars 15, 16 are then horizontal.
  • a fork head 24 is non-rotatably placed on the left end of the threaded spindle 19 in the illustration according to FIG. 2.
  • an angle lever 26 is fixed in the fork head 24. This angle lever is a two-armed lever formed because it is rotatably mounted in the end region of the scissor arm 14.
  • a force transmission roller 27 which engages under the scissor arm 14, is arranged on the angle lever 26 and contacts the surface assigned to the threaded spindle 19.
  • the power transmission roller 27 acts only in the stroke direction. It cannot pull the scissors together in the lowering direction, thereby avoiding the risk of crushing.
  • the low-voltage direct current geared motor 20 is suspended from the associated end of the scissor arm 13 by means of a fork.
  • This fork consists of two cranked levers which are connected to one another by means of screws 28 which are indicated.
  • the lever which can be seen in the illustration is identified by the reference symbol 29.
  • the other lever has the screw holes in the end area.
  • the lever 29 is designed so that a boom 30 is formed for the fork.
  • the rivet 30 is fastened to the associated end of the scissor arm 13 by two rivets 31.
  • an end cap 32 is placed, which at the same time limits the rightward movement of the low-voltage direct current geared motor 20.
  • a stop 33 is provided in the central region of the threaded spindle 19 so that the movement of the low-voltage direct current geared motor 20 to the left is limited.
  • the stop 33 can be moved on the spindle 19 with a certain amount of force.
  • a variable adjustment height of the lifting scissors of the lifting device 12 is thus achieved.
  • the housing of the low-voltage direct current geared motor is a two-part geared housing with a motor mount, which is made of a special plastic.
  • the motor contains an internal threaded nut, not shown for reasons of simplified fasting, which is the output element of the low-voltage direct current geared motor and is rotated when switched on. This shaft nut can have external teeth.
  • the limit switches for limiting the movement of the low-voltage direct current geared motor are integrated in the housing and are actuated, when the end cap 32 or the stop 33 is touched.
  • the bars 15, 16 are connected to the bars of the frame or of the slatted frame by means of fastening angles. From the drawing it can already be seen that the assembly of the lifting device 12 at the manufacturer is extremely simple, due to the solution of the fixed threaded spindle 19, the angle lever 26 and the fork containing the lever 28. Due to its flat design, the entire drive can advantageously be preassembled with the spar 15 at the slatted frame manufacturer and then folded in under the slatted frame 10 for storage and transport.
  • the motor with the gearbox and the spindle 19 are no thicker than the slatted frame 10, so that the usual transport and storage dimensions are not impaired.
  • the two spars 15, 16 of the lifting device 12 are moved together by reversing the low-voltage direct-current geared motor 20.
  • the contact between the surface of the scissor arm 14 and the force transmission roller 27 is maintained by the weight of the lifting device 12. Since it only acts in the lifting direction, it cannot pull the scissors together in the lowering direction, thereby avoiding the risk of crushing.
  • the housing of the power supply 21 consists of two parts.
  • the power supply 21 contains a transformer and a control board. It can also be designed for remote control operation.
  • the control unit 22 can, as shown, be a hand switch. However, a remote control receiver that responds by radio or infrared is also conceivable.
  • An electronic switching device would also be conceivable, for example for demonstration in a shop window with a continuous operation function.

Abstract

A lifting device for turnable parts of a furniture article has a scissors-type element, an electric motor actuating the scissors-type element and having a driven member formed as a rotatable nut, and a stationary threaded spindle on which the electric motor is displaceable.

Description

Die vorliegende Erfindung betrifft eine Hubeinrichtung für schwenkbare Möbelteile eines Möbels. Die in Rede stehende Hubeinrichtung ist insbesondere zum Schwenken des Kopf- und/oder des Fußteils eines Lattenrostes ausgelegt. Zum Verschwenken dieser Möbelteile sind Beschläge in vielen Ausführungen bekannt. Diese Beschläge sind mit einer Rastverzahnung und einem Stützhebel versehen, der in Abhängigkeit von dem Neigungswinkel in eine entsprechende Raste eingreift. Je nach dem Abstand der Rasten ergeben sich entsprechende Sprünge zwischen den einzelnen Neigungswinkeln. Die bekannten Beschläge sind demzufolge nicht für eine stufenlose Verstellung der zu verschwenkenden Möbelteile geeignet. Außerdem können die Möbelteile nur manuell geschwenkt werden. Darüber hinaus ist noch nachteilig, daß sie nur dann in die gestreckte Lage zurückgeschwenkt werden können, wenn sie zunächst in die größte Winkellage geschwenkt werden, da die Beschläge so ausgelegt sind, daß dann der Stützhebel oberhalb der Rasten entlanggleiten kann. Außerdem sind diese vorbekannten Beschläge nicht geeignet, um beispielsweise vorhandene Lattenroste nachzurüsten.The present invention relates to a lifting device for pivoting furniture parts of a piece of furniture. The lifting device in question is designed in particular for pivoting the head and / or foot part of a slatted frame. Many designs of fittings are known for pivoting these furniture parts. These fittings are provided with locking teeth and a support lever which engages in a corresponding detent depending on the angle of inclination. Depending on the distance between the detents, there are corresponding jumps between the individual angles of inclination. The known fittings are therefore not suitable for a continuous adjustment of the furniture parts to be pivoted. In addition, the furniture parts can only be pivoted manually. In addition, it is also disadvantageous that they can only be pivoted back into the extended position if they are first pivoted into the largest angular position, since the fittings are designed so that the support lever can then slide above the catches. In addition, these previously known fittings are not suitable for retrofitting existing slatted frames, for example.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Hubeinrichtung zu schaffen, mit der mit schwenkbaren Möbelteilen ausgerüstete Möbel nachgerüstet werden können. Ferner soll die Hubeinrichtung einfach zu bedienen sein und das zu verstellende Möbelteil soll stufenlos verstellbar sein. Darüber hinaus soll das zu verschwenkende Möbelteil von jeder Winkelstellung aus in die gestreckte Lage zurückgeschwenkt werden können.The present invention has for its object to provide a lifting device with which furniture equipped with pivotable furniture parts can be retrofitted. Furthermore, the lifting device should be easy to use and the furniture part to be adjusted should be stepless be adjustable. In addition, the furniture part to be pivoted should be able to be pivoted back into the extended position from any angular position.

Die gestellte Aufgabe wird erfindungsgemäß durch eine Hubschere, die von einem Niederspannungsgleichstromgetriebemotor betätigbar ist, dessen Abtriebsglied als rotierend antreibbare Innengewindemutter ausgebildet ist und durch eine ortsfeste Gewindespindel, auf der der Niederspannungsgleichstromgetriebemotor verfahrbar ist, gelöst.The object is achieved according to the invention by a lifting shear that can be actuated by a low-voltage direct-current geared motor, the output member of which is designed as a rotationally drivable internal threaded nut and by a fixed threaded spindle on which the low-voltage direct-current geared motor can be moved.

Die erfindungsgemäße Hubeinrichtung ermöglicht ein stufenloses Verstellen des schwenkbaren Möbelteils, bedingt durch das Zusammenwirken der Hubschere mit dem Niederspannungsgleichstromgetriebemotor. Außerdem ist das Verstellen äußerst bequem, da lediglich der Getriebemotor einzuschalten ist. Durch geeignete Bauteile lassen sich die Enden der Scherenarme der Hubschere an die Bauteile des zu verschwenkenden Möbelteils anbringen. Da der Niederspannungsgleichstromgetriebemotor ein drehrichtungsumkehrbarer Motor ist, kann das zu verschwenkende Möbelteil aus jeder Winkelstellung heraus in eine gestreckte bzw. flache Stellung geschwenkt werden. Die erfindungsgemäße Hubeinrichtung ist auch für den Selbsteinbau geeignet.The lifting device according to the invention enables a stepless adjustment of the pivotable furniture part, due to the interaction of the lifting shears with the low-voltage direct current geared motor. In addition, the adjustment is extremely convenient since only the gear motor has to be switched on. The ends of the scissor arms of the lifting shears can be attached to the components of the furniture part to be pivoted by means of suitable components. Since the low-voltage direct current geared motor is a reversible motor, the furniture part to be pivoted can be pivoted out of any angular position into an extended or flat position. The lifting device according to the invention is also suitable for self-installation.

Die Festlegung des Niederspannungsgleichstromgetriebemotors und der Gewindespindel wird besonders einfach, wenn die Hubschere einen festen und einen stufenlos verstellbaren Holm aufweist, und daß die Enden einer Seite der Scherenarme der Hubschere an den beiden Holmen drehbar gelagert sind, und wenn jedes gegenüberliegende Ende der Scherenarme auf dem zugeordneten Holm verschiebbar geführt ist. Außerdem läßt sich die Hubeinrichtung bei der Nachrüstung eines Möbels besonders einfach anbringen. Da sich der Niederspannungsgleichstromgetriebemotor nach dem Einschalten auf der Gewindespindel verschiebt und dadurch über geeignete Verbindungsteile die Hubschere betätigt, ist es konstruktiv besonders günstig, wenn die ortsfeste Gewindespindel parallel und in einem bestimmten Abstand zu den Holmen der Hubschere steht.The definition of the low-voltage DC geared motor and the threaded spindle is particularly easy if the lifting shears have a fixed and a continuously adjustable spar, and that the ends of one side of the scissor arms of the lifting shears are rotatably mounted on the two spars, and if each opposite end of the scissor arms on the associated spar is slidably guided. In addition, the lifting device can be attached particularly easily when retrofitting furniture. Since the low-voltage DC geared motor moves on the threaded spindle after being switched on and thereby actuates the lifting shears via suitable connecting parts, it is particularly advantageous in terms of design if the fixed threaded spindle is parallel and at a certain distance from the spar of the lifting shears.

Die Festlegung der Gewindespindel ist besonders einfach, wenn sie an einem Ende einen Gabelkopf trägt, an dem ein an einem Scherenarm festgelegter Winkelhebel angelenkt ist, und daß der Niederspannungsgleichstromgetriebemotor im gegenüberliegenden Bereich der orstfesten Spindel angeordnet ist. Zweckmäßigerweise ist der Niederspannungsgleichstromgetriebemotor in einer Gabel gelagert, die einen an einem Scherenarm befestigten Ausleger aufweist. Dadurch entstehen bei der Bewegung des Niederspannungsgleichstromgetriebemotors günstige Verhältnisse zur Kraftübertragung auf den Scherenarm, da der Ausleger im Bereich eines Endes des zugeordneten Scherenarmes befestigt ist. Eine montage- und wartungsfreundliche Ausführung wird erreicht, wenn der Gabelkopf aus zwei miteinander verbundenen Hebeln gebildet ist, die entsprechend gekröpft sind.The setting of the threaded spindle is particularly simple if it carries a fork head at one end, to which an angle lever fixed on a scissor arm is articulated, and that the low-voltage direct current geared motor is arranged in the opposite region of the stationary spindle. The low-voltage direct current geared motor is expediently mounted in a fork, which has a boom attached to a scissor arm. This creates favorable conditions for power transmission to the scissor arm during the movement of the low-voltage direct current geared motor, since the boom is fastened in the region of one end of the associated scissor arm. An assembly and maintenance-friendly design is achieved if the fork head is formed from two interconnected levers that are cranked accordingly.

Weitere Kennzeichen und Merkmale einer vorteilhaften Ausgestaltung der vorliegenden Erfindung sind Gegenstand von weiteren Unteransprüchen und ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels. Es zeigen:

Fig. 1
ein mit einer erfindungsgemäßen Hubeinrichtung ausgerüstetes Lattenrost in perspektivischer Darstellung,
Fig. 2
die Hubeinrichtung nach der Fig. 1 im Aufriß und
Fig. 3
eine Einzelheit der Fig. 2 in Schnittdarstellung, die Anordnung der Gleitstücke an den Scherenarmen zeigend.
Further characteristics and features of an advantageous embodiment of the present invention are the subject of further subclaims and result from the following description of a preferred exemplary embodiment. Show it:
Fig. 1
a slatted frame equipped with a lifting device according to the invention in perspective view,
Fig. 2
the lifting device of FIG. 1 in elevation and
Fig. 3
a detail of FIG. 2 in a sectional view showing the arrangement of the sliders on the scissor arms.

Der in der Fig. 1 dargestellte Lattenrost 10 weist ein um die Horizontalachse schwenkbares Kopfteil 11 auf. Dieses Kopfteil 11 ist durch die in der Fig. 2 dargestellte Hubeinrichtung 12 schwenkbar. Auch das vom Kopfteil 11 bis zum fußseitigen Ende reichende Stück des Lattenrostes ist im dargestellten Ausführungsbeispiel um eine Horizontalachse schwenkbar. Die Hubeinrichtung 12 beinhaltet eine Hubschere, die im wesentlichen aus zwei Scherenarmen 13, 14 und zwei Holmen 15, 16 besteht. Die in der Darstellung linken Enden der Scherenarme 13, 14 sind an den Holmen 15, 16 drehbar gelagert. Die Lagerstellen liegen in den Endbereichen. Die gegenüberliegenden Enden der Scherenarme 13, 14 sind an Gleitstücken 17, 18 drehbar gelagert. Diese Gleitstücke 17, 18 sind verschiebbar auf die Holme 15, 16 aufgesetzt, so daß die Holme 15, 16 im Sinne von Führungsstangen zu sehen sind. Gemäß der Fig. 3 wird zunächst ein Gleitstück 17 bzw. 18 auf den zugehörigen Scherenarm 13 bzw. 14 vormontiert. Der jeweilige Holm 15 bzw. 16 wird später eingeschoben und hat zum zugeordneten Scherenarm 13, 14 relativ wenig Luft. Durch diese vorteilhafte Ausbildung wird die Hubschere besonders stabilisiert, da nur sehr geringe Kippmomente auftreten können. Die Hubeinrichtung 12 beinhaltet außerdem noch eine parallel und im Abstand zu den Holmen 15, 16 verlaufende Gewindespindel 19, auf die ein Niederspannungsgleichstromgetriebemotor aufgesetzt ist. Die Gewindespindel 19 ist unverdrehbar gehalten. Die Hubeinrichtung beinhaltet ferner noch ein Netzteil 21, damit die Hubeinrichtung 12 aus dem üblichen Netz mit Strom versorgt werden kann. Das Netzteil 21 erzeugt aus der Netzspannung die erforderliche gleichgerichtete Niederspannung. Die Stromzuführung zum Niederspannungsgleichstromgetriebemotor erfolgt durch ein übliches Kabel. Zum Ein- und Ausschalten des Niederspannungsgleichstromgetriebemotors ist im dargestellten Ausführungsbeispiel ein Handschalter 22 vorgesehen, der nicht näher erläutert wird, da derartige Schalter bekannt sind.The slatted frame 10 shown in FIG. 1 has a head part 11 which can be pivoted about the horizontal axis. This head part 11 can be pivoted by the lifting device 12 shown in FIG. 2. The piece of slatted frame extending from the head part 11 to the end on the foot side can also be pivoted about a horizontal axis in the exemplary embodiment shown. The lifting device 12 includes lifting scissors, which essentially consists of two scissor arms 13, 14 and two bars 15, 16. The left ends of the scissor arms 13, 14 in the illustration are rotatably mounted on the bars 15, 16. The bearings are in the end areas. The opposite ends of the scissor arms 13, 14 are rotatably mounted on sliders 17, 18. These sliders 17, 18 are slidably mounted on the spars 15, 16 so that the spars 15, 16 can be seen in the sense of guide rods. According to FIG. 3, a slide 17 or 18 is first preassembled on the associated scissor arm 13 or 14. The respective spar 15 or 16 is later inserted and has relatively little air to the associated scissor arm 13, 14. Due to this advantageous design, the lifting shears are particularly stabilized since only very small tilting moments can occur. The lifting device 12 also includes a threaded spindle 19 which runs parallel and at a distance from the bars 15, 16 and on which a low-voltage direct current geared motor is placed. The threaded spindle 19 is held non-rotatably. The lifting device also contains a power supply unit 21 so that the lifting device 12 can be supplied with power from the usual network. The power supply 21 generates the required rectified low voltage from the mains voltage. The power supply to the low-voltage direct current geared motor takes place via a standard cable. To switch the low-voltage direct current geared motor on and off, a hand switch 22 is provided in the exemplary embodiment shown, which is not explained in detail since switches of this type are known.

Die beiden Scherenarme 13, 14 sind auf einem Scherenbolzen 23 drehbar gelagert, der zentrisch angeordnet ist. Bei Verwendung der Hubeinrichtung 12 für ein Lattenrost 10 ist der untere Holm 16 dem Querholm des Rahmens, der obere Holm 15 dem äußeren Querholm des verstellbaren Kopfteiles 11 zugeordnet. Bezogen auf die Einbaulage stehen die Holme 15, 16 dann horizontal. Auf das in der Darstellung nach der Fig. 2 linke Ende der Gewindespindel 19 ist ein Gabelkopf 24 drehfest aufgesetzt. Mitels eines Bolzens 25 ist in den Gabelkopf 24 ein Winkelhebel 26 festgesetzt. Dieser Winkelhebel ist als zweiarmiger Hebel ausgebildet, da er im Endbereich des Scherenarmes 14 drehbar gelagert ist. Im Bereich des dem Gabelkopf 24 abgewandten Endes ist an dem Winkelhebel 26 eine den Scherenarm 14 untergreifende Kraftübertragungsrolle 27 angeordnet, die die der Gewindespindel 19 zugeordnete Fläche kontaktiert. Die Kraftübertragungsrolle 27 wirkt nur in Hubrichtung. In Absenkrichtung kann sie die Schere nicht zusammenziehen, wodurch eine Quetschgefahr vermieden wird.The two scissor arms 13, 14 are rotatably mounted on a scissor pin 23 which is arranged centrally. When using the lifting device 12 for a slatted frame 10, the lower bar 16 is assigned to the cross bar of the frame, the upper bar 15 to the outer cross bar of the adjustable head part 11. In relation to the installation position, the spars 15, 16 are then horizontal. A fork head 24 is non-rotatably placed on the left end of the threaded spindle 19 in the illustration according to FIG. 2. By means of a bolt 25, an angle lever 26 is fixed in the fork head 24. This angle lever is a two-armed lever formed because it is rotatably mounted in the end region of the scissor arm 14. In the region of the end facing away from the fork head 24, a force transmission roller 27, which engages under the scissor arm 14, is arranged on the angle lever 26 and contacts the surface assigned to the threaded spindle 19. The power transmission roller 27 acts only in the stroke direction. It cannot pull the scissors together in the lowering direction, thereby avoiding the risk of crushing.

Der Niederspannungsgleichstromgetriebemotor 20 ist mittels einer Gabel an dem zugeordneten Ende des Scherenarmes 13 aufgehängt. Diese Gabel besteht aus zwei gekröpften Hebeln, die durch andeutungsweise dargestellte Schrauben 28 miteinander verbunden sind. Der in der Darstellung erkennbare Hebel ist durch das Bezugszeichen 29 gekennzeichnet. Der andere Hebel hat im Endbereich die Schraubenlöcher. Wie aus der Fig. 2 erkennbar, ist der Hebel 29 so gestaltet, daß für die Gabel ein Ausleger 30 entsteht. Durch zwei Niete 31 ist aus der Ausleger 30 an dem zugeordneten Ende des Scherenarmes 13 befestigt. Auf die Gewindespindel 19 ist an der dem Gabelkopf 24 abgewandten Seite eine Abschlußkappe 32 aufgesetzt, die gleichzeitig die nach rechts gehende Bewegung des Niederspannungsgleichstromgetriebemotors 20 begrenzt. Im mittleren Bereich der Gewindespindel 19 ist ein Anschlag 33 vorgesehen, damit die nach links gerichtete Bewegung des Niederspannungsgleichstromgetriebemotors 20 begrenzt ist. Der Anschlag 33 ist auf der Spindel 19 mit einem gewissen Kraftaufwand verschiebbar. Somit wird eine variable Verstellhöhe der Hubschere der Hubeinrichtung 12 erreicht. In nicht dargestellter Weise ist das Gehäuse des Niederspannungsgleichstromgetriebemotors ein zweiteiliges Getriebegehäuse mit einer Motoraufnahme, welches aus einem Spezialkunststoff gefertigt ist. Außerdem enthält der Motor eine, aus Gründen der vereinfachten Fastellung nicht gezeigte Innengewindemutter, die das Abtriebsglied des Niederspannungsgleichstromgetriebemotors ist und beim Einschalten gedreht wird. Diese Wellenmutter kann eine Außenverzahnung aufweisen. Die Endschalter zur Begrenzung der Bewegung des Niederspannungsgleichstromgetriebemotors sind in dem Gehäuse integriert und werden betätigt, wenn die Abschlußkappe 32 oder der Anschlag 33 berührt wird. Bei der Verwendung der Hubeinrichtung 12 für ein Lattenrost 10 werden mittels Befestigungswinkel die Holme 15, 16 mit den Holmen des Rahmens bzw. des Lattenrostes verbunden. Aus der Zeichnung ergibt sich schon, daß auch die Montage der Hubeinrichtung 12 beim Hersteller äußerst einfach ist, bedingt durch die Lösung der feststehenden Gewindespindel 19, dem Winkelhebel 26 und der den Hebel 28 beinhaltenden Gabel. Durch seine flache Bauweise kann der Gesamtantrieb in vorteilhafter Weise beim Lattenrosthersteller mit dem Holm 15 vormontiert und dann zur Lagerung und zum Transport unter den Lattenrost 10 eingeklappt werden. Der Motor mit dem Getriebe und der Spindel 19 sind nicht dicker als der Lattenrost 10, so daß die üblichen Transport-und Lagerabmaße nicht beeinträchtigt werden.The low-voltage direct current geared motor 20 is suspended from the associated end of the scissor arm 13 by means of a fork. This fork consists of two cranked levers which are connected to one another by means of screws 28 which are indicated. The lever which can be seen in the illustration is identified by the reference symbol 29. The other lever has the screw holes in the end area. As can be seen from Fig. 2, the lever 29 is designed so that a boom 30 is formed for the fork. The rivet 30 is fastened to the associated end of the scissor arm 13 by two rivets 31. On the threaded spindle 19 on the side facing away from the fork head 24, an end cap 32 is placed, which at the same time limits the rightward movement of the low-voltage direct current geared motor 20. A stop 33 is provided in the central region of the threaded spindle 19 so that the movement of the low-voltage direct current geared motor 20 to the left is limited. The stop 33 can be moved on the spindle 19 with a certain amount of force. A variable adjustment height of the lifting scissors of the lifting device 12 is thus achieved. In a manner not shown, the housing of the low-voltage direct current geared motor is a two-part geared housing with a motor mount, which is made of a special plastic. In addition, the motor contains an internal threaded nut, not shown for reasons of simplified fasting, which is the output element of the low-voltage direct current geared motor and is rotated when switched on. This shaft nut can have external teeth. The limit switches for limiting the movement of the low-voltage direct current geared motor are integrated in the housing and are actuated, when the end cap 32 or the stop 33 is touched. When using the lifting device 12 for a slatted frame 10, the bars 15, 16 are connected to the bars of the frame or of the slatted frame by means of fastening angles. From the drawing it can already be seen that the assembly of the lifting device 12 at the manufacturer is extremely simple, due to the solution of the fixed threaded spindle 19, the angle lever 26 and the fork containing the lever 28. Due to its flat design, the entire drive can advantageously be preassembled with the spar 15 at the slatted frame manufacturer and then folded in under the slatted frame 10 for storage and transport. The motor with the gearbox and the spindle 19 are no thicker than the slatted frame 10, so that the usual transport and storage dimensions are not impaired.

Zum Auseinanderfahren der beiden Holme 15, 16 wird nach Einschalten des Niederspannungsgleichstromgetriebemotors 20 dieser auf der feststehenden Gewindespindel 19 in Richtung zum Gabelkopf 24 verfahren. Dadurch verschieben sich die rechten Enden der Scherenarme 13, 14 auch in Richtung zum Gabelkopf 24, da der Hebel 28 in Verbindung mit dem Ausleger 30 den Scherenarm 13 mitnimmt. Gleichzeitig verschiebt sich jedoch der Gabelkopf 24 in Richtung zum Niederspannungsgleichstromgetriebemotor 20, bedingt durch das sich einstellende Gleichgewicht der Kräfte. Dadurch hält die Kraftübertragungsrolle 27 ständig Kontakt mit der der Gewindespindel 19 zugewandten Fläche des Scherenarmes 14. Dadurch wird die Aufstellbewegung der Hubeinrichtung 12 noch unterstützt. Das Zusammenfahren der beiden Holme 15, 16 der Hubeinrichtung 12 erfolgt durch Umsteuern des Niederspannungsgleichstromgetriebemotors 20. Dadurch wird durch das Eigengewicht der Hubeinrichtung 12 der Kontakt zwischen der Fläche des Scherenarmes 14 und der Kraftübertragungsrolle 27 aufrechterhalten. Da sie nur in Hubrichtung wirkt, kann sie die Schere in Absenkrichtung nicht zusammenziehen, wodurch die Quetschgefahr vermieden wird.To move the two spars 15, 16 apart, after switching on the low-voltage direct current geared motor 20, the latter is moved on the fixed threaded spindle 19 in the direction of the fork head 24. As a result, the right ends of the scissor arms 13, 14 also move in the direction of the fork head 24, since the lever 28 takes the scissor arm 13 with it in connection with the extension arm 30. At the same time, however, the fork head 24 shifts in the direction of the low-voltage direct current geared motor 20, due to the resulting equilibrium of forces. As a result, the force transmission roller 27 is in constant contact with the surface of the scissor arm 14 facing the threaded spindle 19. This further supports the lifting movement of the lifting device 12. The two spars 15, 16 of the lifting device 12 are moved together by reversing the low-voltage direct-current geared motor 20. As a result, the contact between the surface of the scissor arm 14 and the force transmission roller 27 is maintained by the weight of the lifting device 12. Since it only acts in the lifting direction, it cannot pull the scissors together in the lowering direction, thereby avoiding the risk of crushing.

Das Gehäuse des Netzteiles 21 besteht aus zwei Teilen. Das Netzteil 21 enthält einen Transformator und eine Steuerplatine. Es kann außerdem für einen Fernsteuerungsbetrieb ausgelegt sein. Das Bedienteil 22 kann, wie dargestellt, ein Handschalter sein. Denkbar ist jedoch auch, ein Fernsteuerempfänger, der durch Funk oder Infrarot anspricht. Es wäre auch ein elektronisches Schaltgerät denkbar, z.B. zur Demonstration in einem Schaufenster mit einer Dauerlauffunktion.The housing of the power supply 21 consists of two parts. The power supply 21 contains a transformer and a control board. It can also be designed for remote control operation. The control unit 22 can, as shown, be a hand switch. However, a remote control receiver that responds by radio or infrared is also conceivable. An electronic switching device would also be conceivable, for example for demonstration in a shop window with a continuous operation function.

Claims (18)

Hubeinrichtung für schwenkbare Möbelteile eines Möbels, gekennzeichnet durch eine Hubschere (13, 14, 15, 16), die von einem Niederspannungsgleichstromgetriebemotor (20) betätigbar ist, dessen Abtriebsglied als rotierend antreibbare Innengewindemutter ausgebildet ist und durch eine ortsfeste Gewindespindel (19), auf der der Niederspannungsgleichstromgetriebemotor (20) verfahrbar ist.Lifting device for pivoting furniture parts of a piece of furniture, characterized by lifting scissors (13, 14, 15, 16) which can be actuated by a low-voltage direct current geared motor (20), the output member of which is designed as a rotatably drivable internal thread nut and by a fixed threaded spindle (19) on which the low-voltage direct current geared motor (20) can be moved. Hubeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Hubschere einen stufenlos verstellbaren und einen festen Holm (15, 16) aufweist, daß die Enden einer Seite der Scherenarme (13, 14) der Hubschere an den beiden Holme (15, 16) drehbar gelagert sind und daß jedes gegenüberliegende Ende der Scherenarme (13, 14) auf dem zugeordneten Holm verschiebbar geführt ist.Lifting device according to claim 1, characterized in that the lifting shears have an infinitely adjustable and a fixed bar (15, 16), that the ends of one side of the scissor arms (13, 14) of the lifting shears are rotatably mounted on the two bars (15, 16) and that each opposite end of the scissor arms (13, 14) is slidably guided on the associated spar. Hubeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die ortsfeste Gewindespindel (19) parallel und in einem bestimmten Abstand zu den Holmen (15, 16) der Hubschere steht.Lifting device according to claim 2, characterized in that the stationary threaded spindle (19) is parallel and at a certain distance from the bars (15, 16) of the lifting shears. Hubeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß auf das den drehbar gelagerten Enden der Scherenarme (13, 14) zugeordnete Ende der Gewindespindel (19) ein Gabelkopf (24) aufgesetzt ist, an den ein an einem Scherenarm drehbar gelagerter Winkelhebel (26) angelenkt ist, und daß der Niederspannungsgleichstromgetriebemotor (20) auf dem dem Gabelkopf (24) abgewandten Bereich der Gewindespindel (19) aufgesetzt ist.Lifting device according to claim 3, characterized in that a fork head (24) is attached to the end of the threaded spindle (19) associated with the rotatably mounted ends of the scissor arms (13, 14), to which an angle lever (26) rotatably mounted on a scissor arm is articulated and that the low-voltage direct current geared motor (20) is placed on the area of the threaded spindle (19) facing away from the fork head (24). Hubeinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Bewegungsbereich des Niederspannungsgleichstromgetriebemotors (20) sich bis zur Mitte der Gewindespindel (19) erstreckt.Lifting device according to claim 4, characterized in that the range of motion of the low-voltage direct current geared motor (20) extends to the center of the threaded spindle (19). Hubeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Niederspannungsgleichstromgetriebemotor (20) mittels einer Gabel aufgehängt ist, die einen an einem Scherenarm (13) festgelegten Ausleger (30) aufweist.Lifting device according to claim 1, characterized in that the low-voltage direct current geared motor (20) is suspended by means of a fork which has a boom (30) fixed to a scissor arm (13). Hubeinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Ausleger (30) das dem Niederspannungsgleichstromgetriebemotor (20) abgewandte Ende eines Hebels (28) ist, und daß der Gabelkopf aus zwei gekröpften Hebeln gebildet ist, die miteinander verbunden sind.Lifting device according to claim 6, characterized in that the boom (30) is the end of a lever (28) facing away from the low-voltage direct current geared motor (20), and in that the fork head is formed from two cranked levers which are connected to one another. Hubeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß auf das dem Gabelkopf (24) abgewandte Ende der Gewindespindel (19) eine Abschlußkappe (32) und im mittleren Bereich ein Anschlag (33) aufgesetzt ist, durch die im Gehäuse des Niederspannungsgleichstromgetriebemotors (20) angeordnete Schalter betätigbar sind.Lifting device according to claim 1, characterized in that an end cap (32) is placed on the end of the threaded spindle (19) facing away from the fork head (24) and a stop (33) in the central region, through which the end of the low-voltage direct current geared motor (20) is arranged Switches can be actuated. Hubeinrichtung nach Anspruch 8, dadurch gekennzeichnet, daß durch den verschiebbaren Anschlag (33) die Verstellhöhe der Hubschere der Hubeinrichtung (12) veränderbar ist.Lifting device according to claim 8, characterized in that the adjustable height of the lifting scissors of the lifting device (12) can be changed by the displaceable stop (33). Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das dem Gabelkopf (24) abgewandte Ende des Winkelhebels (26) eine Kraftübertragungsrolle (27) trägt, die den Scherenarm (14) untergreift und die der Gewindespindel (19) zugewandte Fläche kontaktiert.Lifting device according to one or more of the preceding claims, characterized in that the end of the angle lever (26) facing away from the fork head (24) carries a force transmission roller (27) which engages under the scissor arm (14) and contacts the surface facing the threaded spindle (19) . Hubeinrichtung nach Anspruch 10, dadurch gekennzeichnet, daß zur Ausschaltung einer Quetschgefahr die auf dem Winkelhebel (26) gelagerte Kraftübertragungsrolle (27) ausschließlich beim Auseinanderfahren der Hubschere der Hubeinrichtung (12) eine Kraft überträgt.Lifting device according to claim 10, characterized in that to eliminate a risk of being crushed, the force transmission roller (27) mounted on the angle lever (26) transmits a force only when the lifting scissors of the lifting device (12) move apart. Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gehäuse des Niederspannungsgleichstromgetriebemotors (20) ein aus Spezialkunststoff gefertigtes zweiteiliges Gehäuse mit einer Motoraufnahme ist.Lifting device according to one or more of the preceding claims, characterized in that the housing of the low-voltage direct current geared motor (20) is a two-part housing made of special plastic with a motor mount. Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die mit einem Gewinde versehene Wellenmutter das Abtriebsglied des Niederspannungsgleichstromgetriebemotors ist und eine Außenverzahnung aufweist.Lifting device according to one or more of the preceding claims, characterized in that the threaded shaft nut is the output member of the low-voltage direct current geared motor and has external teeth. Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Hubeinrichtung ein Netzteil (21) beinhaltet, welches ein aus zwei Gehäuseteilen bestehendes Gehäuse aufweist, und daß das Netzteil mit einem Transformator und einer Steuerplatine ausgerüstet ist.Lifting device according to one or more of the preceding claims, characterized in that the lifting device includes a power supply unit (21) which has a housing consisting of two housing parts, and in that the power supply unit is equipped with a transformer and a control board. Hubeinrichtung nach Anspruch 14, dadurch gekennzeichnet, daß das Netzteil 821) mindestens einen, vorzugsweise jedoch zwei Anschlüsse für jeweils einen Antrieb aufweist.Lifting device according to claim 14, characterized in that the power supply unit 821) has at least one, but preferably two, connections for each drive. Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Hubeinrichtung ein Bedienteil enthält, welches als Handschalter (22), als Fernsteuerempfänger oder als elektronisches Schaltgerät ausgebildet ist.Lifting device according to one or more of the preceding claims, characterized in that the lifting device contains an operating part which is designed as a manual switch (22), as a remote control receiver or as an electronic switching device. Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Gleitstücke (17, 18) zwecks eines relativ geringen Kippmoments sowie zur Stabilisierung als Flachteile ausgebildet sind, und daß das Spiel zum zugeordneten Scherenarm (13 bzw. 14) gering ist.Lifting device according to one or more of the preceding claims, characterized in that the sliding pieces (17, 18) are designed as flat parts for the purpose of a relatively low tilting moment and for stabilization, and that the play with the associated scissor arm (13 or 14) is small. Hubeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Lagerung und zum Transport des mit der Hubeinrichtung (12) ausgerüsteten Lattenrostes (10) die Hubeinrichtung (12) unterhalb des Lattenrostes (10) klappbar ist, so daß die Breite des Lattenrostes (10) unverändert bleibt.Lifting device according to one or more of the preceding claims, characterized in that for the storage and transport of the slatted frame (10) equipped with the lifting device (12), the lifting device (12) can be folded below the slatted frame (10), so that the width of the slatted frame (10) remains unchanged.
EP92104351A 1991-03-28 1992-03-13 Lifting device Expired - Lifetime EP0505847B1 (en)

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DE9103817U 1991-03-28
DE9103817U DE9103817U1 (en) 1991-03-28 1991-03-28

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JP (1) JPH0777959B2 (en)
AT (1) ATE126984T1 (en)
DE (2) DE9103817U1 (en)
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DE9300438U1 (en) * 1993-01-15 1993-03-11 Dewert Antriebs- Und Systemtechnik Gmbh & Co. Kg, 4983 Kirchlengern, De
US5481769A (en) * 1993-01-15 1996-01-09 Dewert Antriebs- U. Systemtechnik Gmbh & Co Kg Lifting apparatus
US5544376A (en) * 1994-01-31 1996-08-13 Maxwell Products, Inc. Articulated bed with customizable remote control
US6106576A (en) * 1994-07-19 2000-08-22 Maxwell Products, Inc. Adjustable massage bed assembly with handheld control unit having automatic stop safety feature
US6008598A (en) * 1998-04-22 1999-12-28 Patmark Company, Inc. Hand-held controller for bed and mattress assembly
US6396224B1 (en) 1998-04-22 2002-05-28 Hill-Rom Services, Inc. Hand-held controller for bed and mattress assembly
FR2780256A1 (en) 1998-06-24 1999-12-31 Epeda Sa Adjustable sprung divan
DE19949216A1 (en) * 1999-10-13 2001-04-19 Manfred Heckner A method for raising or lowering a section of a bed mattress supporting frame has a hinged plate whose angle to the frame is altered by an electric motor.
US8125318B2 (en) 2004-09-10 2012-02-28 Hill-Rom Services, Inc. Wireless control system for a patient-support apparatus
US8710950B2 (en) 2004-12-23 2014-04-29 Hill-Rom Services, Inc. Wireless control system for a patient support apparatus
FR2887438A1 (en) 2005-06-24 2006-12-29 Michel Bertuzzi Adjustable bedding device for use in e.g. hospital, has longitudinal base part with head part, foot part and central part which is movably mounted in rotation and pivoted around central axle so as to tilt foot part towards ground

Also Published As

Publication number Publication date
JPH0777959B2 (en) 1995-08-23
EP0505847B1 (en) 1995-08-30
DE59203415D1 (en) 1995-10-05
ES2076587T3 (en) 1995-11-01
JPH05238681A (en) 1993-09-17
ATE126984T1 (en) 1995-09-15
DE9103817U1 (en) 1991-06-27
DK0505847T3 (en) 1995-12-18
US5305482A (en) 1994-04-26

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