Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
  • A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
  • A61G7/1013—Lifting of patients by
  • A61G7/1019—Vertical extending columns or mechanisms
• • 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
  • A61G5/104—Devices for lifting or tilting the whole wheelchair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
  • A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
  • A61G7/104—Devices carried or supported by
  • A61G7/1046—Mobile bases, e.g. having 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
  • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
  • A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
  • A61G7/1073—Parts, details or accessories
  • A61G7/1074—Devices foldable for storage
• • 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
  • A61G2200/00—Information related to the kind of patient or his position
  • A61G2200/30—Specific positions of the patient
  • A61G2200/34—Specific positions of the patient sitting

Definitions

• the present invention relates to a lifting apparatus, particular a mobile lifting apparatus for assisting patients using wheeled chairs, comprising a mainly horizontal lifting platform and two pairs of scissor arms which at opposite sides of the apparatus being pivotally interconnected in hinge points, one of said pair of scissor arms at one end being provided with support wheels and at the opposite end being pivotally connected with said lifting platform, while said other pair of scissor arms at one end being adapted to be in non-skid contact with a support surface, e.g.
• a lifting apparatus of the type generally described above is previously known from EP patent publication 0 136 986 and FR patent specification 1 169 210 which discloses a lifting table comprising two pairs of scissor arms, each pair consisting of an inner arm and an outer arm pivotally ineterconnected by means of a joint.
• On the outer scissor arm is provided a shoulder with a sloping sideway and the inner arm has an oblong hole for a transverse axle adapted to cooperate with the slideway and coupled with a power transmission device in the form of a hydraulic cylinder.
• the two outer arms extend slightly beyond the inner arms and are interconnected by means of an axle on which the hudraulic cylinder is attached.
• the present invention has for its purpose to eliminate the above-mentioned disadvantages and to provide a liftin apparatus with a simple and reliable construction an function.
• said swing movement causing means consists of activation members which at one end ⁇ of a therewit cooperating displacement force actuator being adapted to cause displacement of said activation members backwards and forwards between said parts of said pairs of scissor arms at the same side of said hinge points for lifting up said lifting platform when displacing said activation members towards said hinge points and for lowering said lifting platform when displacing said activation members away from said hinge points.
• said activation members for each pair of scissor arms consists of separate activation means placed at opposite ends of a transverse beam member, said displacement force actuator being inserted between the center of said transverse beam member and the center of a twisting-stiff connection between end parts of said other pair of scissor arms at said end thereof being in non-skid contact with said support surface, i.e. opposite to said end being in sliding bearing contact with said lifting platform.
• said separate activation means consists of on commen axle journals suspended double-rollers of which the respective half-parts cooperates with separate parts of each pair of scissor arms.
• said separate parts of each pair of scissor arms cooperating with the said respective half- parts of said double-rollers consists of cam discs which at opposite sides of the apparatus are secured on the side of the outermost pair of scissor arms and on the side of the innermost pair of scissor arms, respectively, to the same side of said hinge points, since the mutually distance between said pairs f scissor arms at both sides of the apparatus corresponds to the width of said double-rollers.
• said cam discs are positioned in such a manner on the respective sides of said pairs of scissor arms and have such configurations that the pairs of scissor arms may be placed mutually flushing when the apparatus is completely swung together, i.e. with the lifting platform in its lowermost position and with said double-rollers being positioned between sais pairs of scissor arms and in operatively contact with said cam discs.
• said displacement force actuator consists of an actuator with worm drive and ball-screw driven by an electic motor, e.g. operating at 24 V/40 W.
• the configurations of said cam discs and said double-rollers are such mutually adapted that in operation direct and fully proportionality is achieved between the displacement movement of the rollers and the displacement in the hight of the lifting platform and that the displacement force needed is approximately constant during the complete displacement movement of said double-rollers when lifting up the platform.
• Fig. 1 is a perspective view of an embodiment of the lifting apparatus according to the invention.
• Fig. 2 is a side view - partly in section - of a preferred embodiment of a lifting apparatus according to the invention - shown in completely swung together condition and provided with approach ramp.
• Figs. 3A-3E are site plan views - as seen from the side - for showing the function of the apparatus according to the invention.
• Fig. 4 is a perspective partial view showing a double-roller and cam dies of a lifting apparatus according to the invention.
• a lifting apparatus 2 shown in Fig. 1 is adapted for use when treating the feet of patiens using wheeled chairs such that the foot-therapeut may be seated in a pleasant and correct working position in front of the patients in stead of as usual to have to lie on the knees or be seated uncomfortable on the floor in front of patients using wheeled chairs.
• the lifting apparatus 2 may be complete swung together, i.e. that a lifting platform 4 may be completely lowered to a reasonably low loading hight in which the patient using wheeled chair via an inclined ramp 6 relatively easy may be drive up on the platform 4 as the loading hight may be less than 100 mm, i.e. that maybe the patients using wheeled chairs may drive up on the platform 4 by themselves.
• the lifting apparatus 2 is provided with two pairs of scissor lifting arms 8 and 10, each of which having mutually parallel lifting arm parts and each neing pivotally interconnected in hinge points 12 at opposite sides of the lifting apparatus.
• the outermost pair of scissor lifting arms 8 is at one end provided with support wheels 14 and is at the opposite end, i.e. on the other side of the hinge points 12, pivotally connected with the lif ing platform 4.
• the innermost pair of scissor lifting arms 10 is at one end provided with non-skid rest parts 16 and is at opposite end in sliding contact against the underside of the lifting platform 4, i.e. in front of the hinge points as the end of the lifting apparatus being provided with the support wheels 14 is defined as the front end thereof.
• the mutually parallel parts of both pairs of scissor lifting arms 8 and 10 are at the respective supporting ends thereof mutually twisting-stiff connected by means of thin-walled, circular tubular members 18 and 20.
• the outermost pair of scissor lifting arms 8 is in front of the hinge points 12 and at against each other turned innersides provided with slice-shaped cam discs 22 of which an arched guiding edge is turning upwards.
• the innermost pair of scissor lifting arms 10 is in front of the hinge points 12 and at their opposite outsides provided with slice-shaped cam discs 24 of which an arched guiding edge is turning downwards as the cam discs 22 and 24 have quite uniform shape but being only mounted mutually inverted cfr. in particular Figs. 3A - 3E.
• the hight of the cam discs 22 and 24 is slightly larger than the hight of the lifting arm parts on which the cam discs 22 and 24 are fixed.
• the cam discs 22 and 24 cooperates with there-between positioned double-rollers 26 being pivotally suspended on axle journals 28 at opposite ends of a transverse beam 30 (Fig. 4) as each separate half- art of the guiding rollers 26 is in operatively contact with the respective cam discs 22,24, i.e. that the respective guiding roller parts shall be able to rotate in opposite directions due to simultaneously operatively contact with the opposite arched but each other overlapping guiding edges of the cam discs 22, 24.
• a displacement force actuator in the form of an electric driven actuator 32 is inserted between the center of the transverse beam 30 and the center of the rearmost transverse tubular member 20 in such a manner that the actuator 32 is pivotally connected to the tubular member 20 at 34.
• the actuator 32 is driven by means of an electric motor 36 via a worm drive and a so-called ball-screw, i.e. that the actuator as a whole is very light-running but nevertheless self-locking concerning its lenght-variation which in principle may be compared with an usual pneumatic or hydraulic cylinder/ piston-mechanism.
• the double-rollers 26 are provided with against each other turned protruding flanges 26 which together with the said i relation to the lifting arm parts protruding guiding edges of the cam discs 22, 24 gives the transverse beam 30 the necessary stability sidewards which in particular is important when the guiding rollers 26 assume a position in some distance from the hinge points 12. Moreover, the entire width of the guiding rollers 26 is adapted in accordance with mutual distance between the pairs of scissor lifting arms 8 and 10 as the guiding rollers 26 when the apparatus is swung completely together cfr. Fig. 2 are actually placed in the space between the pairs of lifting arms 8 and 10.
• each other overlapping cam discs 22, 24 is - as shown in Figs. 3A - 3E - mutually adapted in such a manner that a completely uniformly tension of the actuator 32 and principally direct proportionality between the variation in lenght of the displacement force actuator and the lifting movement of the platform 4.
• the preferred embodiment of the lifting apparatus according to the invention as shown in Fig. 2 has a weight of some 25 kg and since the apparatus at its rearmost end is provided with a handle 40, it is very easy to move around with the apparatus as this during transportation may be pulled supported by the support wheels 14.
• Foot-therapeuts having duties at more nursing homes may easily tranport the lifting apparatus by herself/hinself as futhermore the lifting apparatus has such dimensions that it may be transported in a ordinary car having an extra rear door (hatchback) .
• the lifting apparatus may be provided for mains operation (220V/24W) or it may be provided with a rechargeable battery; but of course the lifting apparatus may as well . be adapted for entirely manual operation operated by means of an open spindle mechanism and hand-drive.
• the lifting apparatus according to the invention in completely swung together condition may very easily be made transport stable as it - as shown in Figs.
• the pair of scissor arms 10 may at their free ends opposite to the tubular member 20 provided with special locking grooves 44 into which the axle journals 28 at the innerside of the guiding rollers 26 may be introduced when the pairs of scissor lifting arms 8 and 10 are swung completely together (Fig.4).
• each other overlapping opposite arched cam discs and there-between placed guiding rollers may advantageously be used in many stationary lifting apparatuses in particular where low starting hight of the lifting platform and relatively large differences in hight shall be achieved on very little space as the lifting principle of the lifting apparatus according to the invention may be used by means of rather cheap and very stably operating apparatuses which furthermore nor as usually have to be over-dimensioned in order to work out an intial-lift from an usual dead centre position what possibly is of greatest importance by the invention.
• the described lifting apparatus may within the scope of this invention be modifyed.
• the lifting apparatus may in a sepecial embodiment be adapted for use on railway stations for lifting up patients using wheeled chairs and being adapted to be stored in special coffers under the railway coach or even under a bus.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Nursing (AREA)
• Engineering & Computer Science (AREA)
• Geology (AREA)
• Mechanical Engineering (AREA)
• Structural Engineering (AREA)
• Invalid Beds And Related Equipment (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8132319

Family Applications (1)

Country Status (4)

Cited By (5)

Families Citing this family (1)

Citations (5)

Family Cites Families (3)

• 1986
  • 1986-09-10 DK DK431086A patent/DK155076C/da not_active IP Right Cessation
• 1987
  • 1987-09-08 WO PCT/DK1987/000109 patent/WO1988001857A1/en active Application Filing
  • 1987-09-08 AU AU79676/87A patent/AU7967687A/en not_active Abandoned
  • 1987-09-08 DE DE19873790553 patent/DE3790553T1/de not_active Ceased

Patent Citations (5)

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