EP1992320B1 - Verschiebbares Möbelstück mit Antriebs- und Steuerrad - Google Patents

Verschiebbares Möbelstück mit Antriebs- und Steuerrad Download PDF

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Publication number
EP1992320B1
EP1992320B1 EP08156179A EP08156179A EP1992320B1 EP 1992320 B1 EP1992320 B1 EP 1992320B1 EP 08156179 A EP08156179 A EP 08156179A EP 08156179 A EP08156179 A EP 08156179A EP 1992320 B1 EP1992320 B1 EP 1992320B1
Authority
EP
European Patent Office
Prior art keywords
arm
piece
steering arm
driving wheel
furniture according
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 - Fee Related
Application number
EP08156179A
Other languages
English (en)
French (fr)
Other versions
EP1992320A3 (de
EP1992320A2 (de
Inventor
David Le Roux
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.)
Hill Rom SAS
Original Assignee
Hill Rom SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hill Rom SAS filed Critical Hill Rom SAS
Publication of EP1992320A2 publication Critical patent/EP1992320A2/de
Publication of EP1992320A3 publication Critical patent/EP1992320A3/de
Application granted granted Critical
Publication of EP1992320B1 publication Critical patent/EP1992320B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/08—Apparatus for transporting beds
    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1051—Arrangements for steering
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/0528—Steering or braking devices for castor wheels
    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/043—Mid wheel drive

Definitions

  • the invention relates to a movable furniture according to claim 1, such as for example a bed or a sick chair, comprising a frame equipped with a steering wheel and drive. It relates more particularly to a very simple system allowing, from a single engine, to develop the driving force necessary to move the furniture and to actuate a mechanism for changing the orientation of the wheel.
  • a hospital bed generally has four free-wheeling wheels to move it. It is also known to add a fifth wheel, director, capable of being positioned in several positions to promote displacements along selected directions, particularly along the longitudinal and transverse directions of the bed. The latter being relatively heavy because of all its equipment, it is desirable to motorize this wheel. Such a motorized system is described in the document US 6,390,213 . The invention achieves this goal with particularly simple means.
  • the invention relates to a movable furniture comprising a chassis equipped with a driving and driving wheel, comprising a support secured to said frame and carrying a steering arm rotatably mounted about a vertical axis and on which said drive wheel is installed, the arm being biased downwardly and cooperating with locking means to occupy one or the other of at least two predetermined positions angularly offset by 90 °, characterized in that said motorized wheel cooperates with a ramp located at beyond one of the two predetermined positions, allowing said steering arm to reach a third predetermined position where said drive wheel is clear of the ground.
  • the invention is transposable on any type of mobile furniture, including a hospital bed or a sick chair.
  • the furniture defined above is further characterized in that said director arm is movable along said vertical axis.
  • the locking means comprise a base secured to the frame and carrying a curved rail centered on the axis of rotation of the director arm.
  • An arm of locking is pivotally mounted facing the curved rail and is integral in rotation with said director arm.
  • a locking mechanism is installed between the locking arm and the rail to secure them to one another in one of the aforementioned predetermined positions.
  • the locking mechanism may for example comprise a controlled electromagnetic trigger latch, said latch being carried by the locking arm and cooperating with notches or the like of said curved rail.
  • the steering arm can be urged downward by the force of a mechanical or pneumatic spring.
  • the locking arm may be integral with a drive rod rotatably connected to said steering arm, the latter being able to slide axially along this driving rod (for example with a square section) when the driving wheel cooperates with the ramp .
  • this driving wheel is mounted at the end of a shaft of an electric motor carried by the steering arm itself.
  • FIG. 1 there is shown schematically the lower frame 11 of a patient bed.
  • this chassis is equipped with four free-wheeling wheels 12 to move it. It also has a fifth wheel 15 both driving and driving.
  • the steering wheel and driving wheel 15 can be placed in at least two different positions angularly offset by 90 °, a first position where the wheel is oriented to move the bed in its longitudinal direction and a second position where the wheel is oriented to move the bed transversely to itself. That first position is that of figure 2 . That second position is that of figure 3 .
  • the bed is equipped with a support 17 secured to the frame and carrying a steering arm 19 rotatably mounted about an axis vertical Y.
  • the driving wheel 15 is installed on this steering arm. More particularly, as shown, the wheel is mounted at the end of the shaft of an electric motor 21 carried by the steering arm 19 itself.
  • the arm 19 is elastically biased downwards by means of a spring 23, here a simple coil spring installed along the vertical axis Y of rotation of the steering arm and mounted with initial pre-compression between an upper plate 24 of the support and the control arm 19.
  • the biasing of the spring is such that the drive wheel 15 can bear on the ground with a bearing force sufficient to drive the bed when the motor 21 is controlled.
  • the director arm 19 is integral with a cylindrical shaft 27 mounted to slide axially in a tubular liner 28 integral with the support 17. The spring is mounted around this tubular liner.
  • the steering arm 19 cooperates with locking means 31 to occupy one or the other of two predetermined positions angularly offset by 90 °. More particularly, when the steering arm 19 occupies the position represented on the figure 2 , the wheel is able to move the bed in its longitudinal direction and when the steering arm occupies the position shown on the figure 3 , the wheel is likely to move the bed transversely to itself.
  • the steering arm 19 is movable along the vertical axis (by compressing the spring more or less) and the wheel 15 cooperates with a ramp 35 located beyond the position shown on the drawing. figure 2 to allow the steering arm to reach a third predetermined position where the driving wheel is clear of the ground. This is the situation illustrated on the figure 4 .
  • the driving wheel 15 has a large diameter portion 37 adapted to roll on the ground and a portion of small diameter 38, adjacent, able to roll on the ramp 35 and therefore to lift the wheel.
  • the locking means 31 comprise a base 40 of the frame forming part of the support 17, and which carries a curved rail 41 centered on the axis of rotation Y integral with the steering arm.
  • a locking arm 43 is pivotally mounted opposite this curved rail in the vicinity of this base.
  • This locking arm 43 is rotationally integral with the steering arm 19. It comprises, in fact, perpendicular to the surface of the the base 40 a square section rod 47 which engages in the cylindrical shaft carrying the director arm.
  • the latter comprises a square section hole through which the rod 47 (not visible in the drawings) so that the director arm and the locking arm remain parallel to each other and are integral in rotation, the spacing between the two arms varying when the wheel 15 cooperates with the ramp.
  • An electromechanical lock mechanism 50 is installed between the locking arm 43 and the curved rail 41 to secure them to one another in one of the aforementioned predetermined positions.
  • said first predetermined position allowing the bed to move in its longitudinal direction
  • said second predetermined position (offset by 90 °) making it possible to move the bed in a transverse direction
  • a third predetermined position for which the wheel 15 is at the upper end of the ramp 35 and is thus clear of the ground, which allows to maneuver the bed manually.
  • the electromechanical locking mechanism comprises a lock 51 controlled electromagnetic trigger, carried by the locking arm 43 and this latch cooperates with holes 52 or similar notches formed in said curved rail.
  • Position sensors make it possible to control the triggering of the lock.
  • the locations of the holes 52 correspond to the three predetermined positions.
  • the locking arrangement can be reversed if three locks are provided on the base at the slots corresponding to the notches (the rail being removed) and a simple strike carried by the locking arm.
  • the motor can be controlled again so that the wheel engages the ramp and causes the ascension of the steering arm, the wheel leaving the contact with the ground.
  • the lock is again actuated to immobilize the wheel in this disengagement position. The bed can then be maneuvered entirely manually.

Landscapes

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

Claims (8)

  1. Verfahrbares Möbelstück mit einem Gestell, das mit einem Lenk- und Antriebsrad ausgestattet ist, umfassend einen Träger (17), der mit dem Gestell fest verbunden ist und einen Lenkarm (19) trägt, welcher um eine vertikale Achse drehbar angebracht ist und an dem das Antriebsrad angeordnet ist, wobei der Arm nach unten elastisch beaufschlagt ist und mit Verriegelungsmitteln zusammenwirkt, um die eine oder andere von wenigstens zwei vorbestimmten, um 90° winkelmäßig versetzten Positionen einzunehmen, dadurch gekennzeichnet, daß das motorisierte Rad mit einer jenseits von einer der beiden vorbestimmten Positionen gelegenen Rampe (35) zusammenwirkt, die dem Lenkarm ermöglicht, eine vorbestimmte dritte Position zu erreichen, in der das Antriebsrad (15) vom Boden entfernt ist.
  2. Möbelstück nach Anspruch 1, dadurch gekennzeichnet, daß der Lenkarm (19) entlang der vertikalen Achse beweglich ist.
  3. Möbelstück nach Anspruch 2, dadurch gekennzeichnet, daß die Verriegelungsmittel (31) einen Fuß (40), der mit dem Gestell fest verbunden ist und eine gekrümmte Schiene (41) trägt, welche um die Rotationsachse des Lenkarms zentriert ist, sowie einen Verriegelungsarm (43) umfassen, der gegenüber der gekrümmten Schiene schwenkbar angebracht und mit dem Lenkarm drehfest verbunden ist, wobei ein Blockiermechanismus zwischen dem Verriegelungsarm und der Schiene angebracht ist, um sie in einer vorerwähnten vorbestimmten Position fest miteinander zu verbinden.
  4. Möbelstück nach Anspruch 3, dadurch gekennzeichnet, daß der Blockiermechanismus einen Riegel (51) mit gesteuerter elektromagnetischer Auslösung umfaßt, der von dem Verriegelungsarm getragen ist und mit entsprechenden Löchern oder Nuten (52), welche in der gekrümmten Schiene ausgebildet sind, zusammenwirkt.
  5. Möbelstück nach Anspruch 4, dadurch gekennzeichnet, daß der Lenkarm (19) mit einer zylindrischen Welle (27), die in einem mit dem Träger fest verbundenen rohrförmigen Mantel (28) angebracht ist, fest verbunden ist und daß eine Feder (23) um den rohrförmigen Mantel herum, zwischen dem Träger und dem Lenkarm, eingefedert angebracht ist.
  6. Möbelstück nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der Verriegelungsarm (43) mit einer Antriebsstange (47), welche mit dem Lenkarm drehverbunden ist, fest verbunden ist, wobei letzterer entlang dieser Antriebsstange axial verschieblich ist, wenn das Antriebsrad mit der Rampe zusammenwirkt.
  7. Möbelstück nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß das Antriebsrad einen Teil mit großem Durchmesser (37), der geeignet ist, auf dem Boden abzurollen, sowie einen benachbarten Teil mit kleinem Durchmesser (38), der geeignet ist, auf der Rampe abzurollen, umfaßt.
  8. Möbelstück nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Rad (15) an einer Welle eines von dem Lenkarm (19) getragenen Elektromotors (21) angebracht ist.
EP08156179A 2007-05-14 2008-05-14 Verschiebbares Möbelstück mit Antriebs- und Steuerrad Expired - Fee Related EP1992320B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0755048A FR2916139B1 (fr) 2007-05-14 2007-05-14 Meuble deplacable a roue motrice et directrice

Publications (3)

Publication Number Publication Date
EP1992320A2 EP1992320A2 (de) 2008-11-19
EP1992320A3 EP1992320A3 (de) 2009-09-30
EP1992320B1 true EP1992320B1 (de) 2012-03-21

Family

ID=38870240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156179A Expired - Fee Related EP1992320B1 (de) 2007-05-14 2008-05-14 Verschiebbares Möbelstück mit Antriebs- und Steuerrad

Country Status (2)

Country Link
EP (1) EP1992320B1 (de)
FR (1) FR2916139B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319525A1 (de) * 1993-06-14 1994-12-15 Helmut Schuster Transportvorrichtung für Patienten oder bettlägerige Personen
US6109379A (en) * 1997-07-25 2000-08-29 Madwed; Albert Independently pivotable drivewheel for a wheeled chassis
US6390213B1 (en) * 1998-11-16 2002-05-21 Joel N. Bleicher Maneuverable self-propelled cart
CA2589811C (en) * 2004-12-01 2016-02-02 Borringia Industrie Ag A wheeled object of the type adapted to be operated by a walking person

Also Published As

Publication number Publication date
FR2916139A1 (fr) 2008-11-21
EP1992320A3 (de) 2009-09-30
EP1992320A2 (de) 2008-11-19
FR2916139B1 (fr) 2010-06-18

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