WO2007069912A1 - Élévateur pour lit - Google Patents

Élévateur pour lit Download PDF

Info

Publication number
WO2007069912A1
WO2007069912A1 PCT/NZ2006/000316 NZ2006000316W WO2007069912A1 WO 2007069912 A1 WO2007069912 A1 WO 2007069912A1 NZ 2006000316 W NZ2006000316 W NZ 2006000316W WO 2007069912 A1 WO2007069912 A1 WO 2007069912A1
Authority
WO
WIPO (PCT)
Prior art keywords
axle
elevator
coupled
head
foot
Prior art date
Application number
PCT/NZ2006/000316
Other languages
English (en)
Inventor
Bruce Norton Moller
Anthony John Batley
Original Assignee
Howard Wright Limited
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 Howard Wright Limited filed Critical Howard Wright Limited
Publication of WO2007069912A1 publication Critical patent/WO2007069912A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C19/00—Bedsteads
    • A47C19/04—Extensible bedsteads, e.g. with adjustment of length, width, height
    • A47C19/045—Extensible bedsteads, e.g. with adjustment of length, width, height with entire frame height or inclination adjustments
    • 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
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/012—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame

Definitions

  • This invention relates to a bed elevator.
  • a bed elevator mechanism is commonly incorporated in beds where the height of the mattress support/frame is required to be at least raised and lowered (generally relative to a bogie or base) such that the height of the bed can be adjusted.
  • Such an elevator mechanism is, therefore, commonly to be found in hospital beds where, for example, the height of the bed needs to be adjusted to suit one or more people carrying out work in relation to a patient in the bed or to have the height of the bed adjusted to the same as the height of some other equipment to which the patient is to be transferred e.g. an operating table, shower trolley or the like.
  • the mattress deck or platform not only be capable of being raised and lowered relative to a bogie or base but also the deck or mattress platform be capable of tilting in either head down or foot down directions.
  • bed elevator mechanisms It is not uncommon for bed elevator mechanisms to be of a complex construction. This can give rise to complexities in manufacture of the elevator mechanism as well as to maintenance and reliability issues. Some of the complexity arises from the need to include limit switches, stops and like control apparatus to control the extent of raising and lowering and tilting as well as to prevent collisions between moving components of the elevator mechanism.
  • an elevator mechanism for varying the height and/or orientation of a frame or platform of a bed
  • the elevator mechanism including a head end linkage assembly and a foot end linkage assembly each of which is adapted for sliding coupling to the frame or platform, the head end linkage assembly being coupled to an axle or shaft ("head axle”), the foot end linkage being coupled to an axle or shaft (“foot axle”), a first actuator coupled to the foot axle and to a lever extending from the head axle and a second actuator coupled to the head axle and a lever extending from the foot axle, whereby in use operation of the first and second actuators cause the head and foot axles to rotate about their longitudinal axes and thereby result in movement of the head and foot link assemblies.
  • the foot and head linkage assemblies are formed from common componentry.
  • at least, one stabiliser arm is connected between the frame or platform and a linkage assembly preferably the head end linkage assembly.
  • the head and foot axles are mounted to a bogie or trolley assembly.
  • each linkage assembly includes a pair of spaced apart parallel links which are fixedly coupled to the axle, the ends of the links distal from the axle being coupled together by a cross member.
  • Figure 1 is a perspective view of the elevator mechanism in conjunction with a trolley or bogie and a frame which forms part of or is attached to a mattress platform or deck,
  • Figure 2 is a side elevation view of the arrangement as shown in Figure 1 but with a patient/ mattress frame attached to the frame and with the closest side rail of the bogie and closest side member of the frame having been removed in the interests of better illustrating the components and layout of components of the elevator mechanism,
  • Figure 3 is a side elevation view of the same as Figure 2 but showing the frame lowered down to its lowermost point of travel relative to the bogie
  • Figure 4 is a side elevation view similar to Figure 2 but showing a further embodiment of the invention
  • Figure 5 is a side elevation view similar to Figure 3 but showing the further embodiment.
  • a bogie assembly 10 which essentially comprises a pair of spaced apart and parallel side rails 1 1 which are coupled at their ends to cross members 12.
  • Each of the cross members 12 carry a pair of spaced apart wheels 1 3.
  • the wheels are lockable so that when the bed is in a desired position the bed is not readily moveable.
  • a frame 14 which can form part of or be attached to a mattress platform.
  • a typical patient/ mattress platform or support S is shown in Figures 2 and 3.
  • the frame 14 comprises a pair of spaced apart parallel side members 1 5 which are joined at each end to cross members 1 6.
  • the frame 14 is largely constructed in accordance with normal techniques for hospital beds and, therefore, further description of the detailed construction of the frame 14 and patient support platform S is not required for the purposes of the present invention.
  • the frame 14 is mounted to the bogie 10 by the elevator mechanism which includes a head end elevator link assembly 17 and a foot end elevator link assembly 18. As can be seen assemblies 1 7 and 18 are mounted at a lower end to the bogie 10 and at an upper end to the side members 1 5 of the frame 14.
  • the head end link assembly 17 incorporates, according to a preferred construction, a pair of spaced apart parallel elevator links 19 which are joined at their lower ends by an elevator axle 20.
  • the axle 20 is journalled in bearings or pivot blocks 21 coupled to the side rails 1 1 of the bogie 10.
  • the upper end of the elevator links 19 are joined by a cross member 22.
  • a roller 23 is rotatably coupled to each of the elevator links 19 or to the ends of the cross member 22. Rollers 23 are slidingly engaged in roller channels 24 mounted to the frame side member 1 5.
  • Stabilizer arms are preferably coupled to one of the linkage assemblies. Preferably this is the head end link assembly 1 7.
  • a stabiliser arm 25 pivotally coupled in the length of each link 1 9 is a stabiliser arm 25.
  • the arm 25 is pivotally coupled to the link 19 by a bottom pivot 26 and coupled by a top pivot 27 to the side member 15 of the top frame 14.
  • This link 19 keeps the rollers 23 in the channels 24.
  • link 25 is half the length of arm 19 the frame 14 does not translate either towards the head end or the foot end when the frame 14 is raised or lowered.
  • the lower ends of the links 19 are preferably fixed to the ends of the axle 20.
  • the links 19 can pivot relative to the bogie 10 as the axle 20 rotates about it's longitudinal in the bearings 21 .
  • Attached to the axle 20 is an arm 28. As can be seen more clearly in Figure 2 this arm 28 extends downwardly so that its lower end is below the side rails 1 1 of the bogie 10.
  • Pivotally coupled at pivot 29 to the arm 28 is the distal end of the piston rod 30 of a linear actuator 31.
  • the body of the linear actuator 31 is pivotally coupled at pivot 32 to a lug or other mounting 33 which is fixed to the axle 35 of the foot end elevator link assembly 1 8.
  • the foot end elevator link assembly 18 is of generally the same construction as the head end elevator link assembly 17. It thus comprises spaced apart parallel links 34 coupled to axle 35 which is journalled in bearings or pivot blocks 21 .
  • the links 34 are coupled by a cross member 37 and rollers 38 of the link assembly 18 are slidingly engaged in channels 39 carried by the side members 1 5 of the top frame 14.
  • a linear actuator 40 has its piston rod 41 coupled by pivot 42 to arm 43 which extends downwardly from and is fixed to the axle 35.
  • the body of the linear actuator 40 is pivotally coupled at pivot 44 to the axle 20 of the head elevator link assembly 1 7.
  • the bogie 10 includes a power pack, a hydraulic pump for powering the linear actuators, and an electrical control which is switched using a pendant handset or other control elements generally carried by the top frame 14.
  • a power pack for powering the linear actuators
  • an electrical control which is switched using a pendant handset or other control elements generally carried by the top frame 14.
  • the head end actuator 31 and foot end actuator 40 are actuated simultaneously. They, therefore, push on the arms 28 and 43 through the connecting pivots 29 and 42 thereby inducing a torque to rotate the arms 28 and 43. This causes the respective axles 20 and 35 to rotate to thereby raise or lower (relative to the bogie 10) the links 19 and 34. This raising and lowering of the links 1 9 and 34 results in the rollers 23 and 38 moving along the channel rails 24 and 39.
  • the stabiliser arms 25 enable the top frame 14 to move precisely vertically when the top frame 14 is raised.
  • Tilting of the top frame 14 into either head down or foot down configuration is achievable. This is carried out by differing the displacement of the head end actuator 31 and foot end actuator 40 as appropriate in order to obtain a head down or foot down configuration.
  • each linear actuator 31 and 40 is pivotally mounted to the axle of the opposite elevator link assembly 17 or 18. As a result of this a greater tilt (up to 1 6°) can be achieved without the need of limit switches, stops or collisions occurring between the opposing elevator link assemblies.
  • the present invention thus provides a simple yet extremely effective bed elevator arrangement.
  • the construction is such that no limit switches are required with each of the elevator arm assemblies.
  • the extent of movement of each elevator arm assembly is controlled by the extent of movement possible with the linear actuators.
  • each of the elevator link assemblies 1 7 and 1 8 provide for not only manufacturing simplicity but also reduced tooling and jigging as well as stockholding of componentry by the manufacturer. Also cross member (to support the linear actuators 31 and 40) are not required on the bogie.
  • the mounting of the linear actuator of each actuator arm assembly with the axle of the opposite actuator arm assembly means that tilting of the upper frame 14 to an angle of up to 16° is possible. This is advantageously achieved without the need for limit switches and/or stops. Furthermore, the tilting is achievable without collisions between moving components of the two actuator arm assemblies.
  • each elevator arrangement is not able to operate totally independently of the other and allows tilt of up to 16° to be achieved.
  • FIG. 4 The invention according to a second embodiment is shown in Figures 4 and 5.
  • this form of the invention includes a fifth wheel 45 which is attached via a lever arm 46 to the axle 20 of the head end elevator assembly 1 7.
  • the fifth wheel 45 lowers and makes contact with the floor F.
  • the wheel 45 either telescopically or using a secondary floating linkage is effectively spring loaded so as to make contact with the floor F thereby providing active suspension to keep the wheel 45 in contact with the floor when travelling over uneven flooring.
  • This fifth wheel 45 only comes in contact with the floor F when the bed is at full height which also brings the bed to a height most ergonomic for manoeuvring.
  • the fifth wheel 45 provides improved ease of steering over a current four wheel bogie design due to the wheel 45 being near the centre of the head of the bed (a more central turning point). This is an alternative to known designs where the bed is steered by locking one castor at the head end longitudinally in line with the bed.
  • An advantage of incorporating a fifth wheel with the present invention is that the actuation (raising and lowering) of the fifth wheel is provided by the head end elevator assembly 1 7.
  • the head end linkage 17 causes the arm 46 and hence wheel 45 to be fully raised ( Figure 5) while in the fully elevated position of the bed ( Figure 4) the fifth wheel comes into contact with the floor.

Landscapes

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

Abstract

La présente invention vise un mécanisme élévateur servant à faire varier la hauteur et/ou l’orientation du cadre ou de la plate-forme (14) d’un lit. Le mécanisme d’élévateur ci-décrit comprend un ensemble de leviers pour l’extrémité de tête (17) et un ensemble de leviers pour l’extrémité de pieds (18), chacun d’eux étant conçu pour s’accoupler de manière coulissante (23) au cadre ou à la plate-forme (14). L’ensemble de leviers pour l’extrémité de tête (17) est accouplé à un axe ou arbre (20) (« axe de tête »), tandis que les leviers pour l’extrémité de pieds (18) sont accouplés à un axe ou arbre (35) (« axe de pieds »). Un premier actionneur (31) est accouplé à l’axe de pieds (35) et à un levier (28) qui se prolonge de l’axe de tête (20) tandis qu’un deuxième actionneur (41) est accouplé à l’axe de tête (20) et à un levier (43) qui se prolonge de l’axe de pieds (35). Lors de l’utilisation, actionner les premier et deuxième actionneurs (31, 41) produit une rotation des axes de tête et de pieds (20, 35) sur leurs axes longitudinaux ce qui entraîne un mouvement des ensembles de leviers de tête et de pieds (17, 18).
PCT/NZ2006/000316 2005-12-13 2006-12-06 Élévateur pour lit WO2007069912A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ54408905 2005-12-13
NZ544089 2005-12-13

Publications (1)

Publication Number Publication Date
WO2007069912A1 true WO2007069912A1 (fr) 2007-06-21

Family

ID=38163148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2006/000316 WO2007069912A1 (fr) 2005-12-13 2006-12-06 Élévateur pour lit

Country Status (1)

Country Link
WO (1) WO2007069912A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009201485A1 (en) * 2008-05-13 2009-12-03 Wentworth Commercial Furniture Pty Ltd High/low bed
WO2011047617A1 (fr) * 2009-10-22 2011-04-28 Chen Jun Mécanisme à tige de raccordement à équilibrage automatique et lit utilisant ce dernier
US8176584B2 (en) 2008-08-29 2012-05-15 Hill-Rom Services, Inc. Patient-support apparatus with movable top
EP2696833A1 (fr) * 2011-04-11 2014-02-19 Usine Rotec Inc. Élément de mobilier, tel qu'un lit réglable, doté d'une plateforme réglable
EP2716270A1 (fr) 2012-10-05 2014-04-09 K.R. Hospitalsudstyr A/S Lit et son utilisation
GB2549378A (en) * 2016-02-26 2017-10-18 Stryker Corp Lift assembly for patient support apparatus
CN107837113A (zh) * 2017-11-06 2018-03-27 南阳医学高等专科学校第附属医院 一种多方位调节的医用旋转台
US9999558B2 (en) 2011-04-11 2018-06-19 Usine Rotec Inc. Piece of furniture, such as an adjustable bed, having an adjustable platform
US10987260B2 (en) 2017-04-21 2021-04-27 Stryker Corporation Patient handling apparatus with hydraulic control system
US10987268B2 (en) 2017-04-21 2021-04-27 Stryker Corporation Emergency cot with a litter height adjustment mechanism
US11583455B2 (en) 2019-10-28 2023-02-21 Stryker Corporation Hydraulic valve and system
US11730650B2 (en) 2019-12-30 2023-08-22 Stryker Corporation Patient support apparatus with hydraulic oscillation dampening
US11896531B2 (en) 2019-10-28 2024-02-13 Stryker Corporation Hydraulic circuit for a patient handling apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5135350A (en) * 1987-07-27 1992-08-04 Eelman Albert H Method for transporting a patient from an ambulance
DE4323374C1 (de) * 1993-07-13 1994-12-15 Hansa Holz Kontor Horst Rueckl Einlegerahmen für Bettgestelle
EP0838206A1 (fr) * 1996-10-25 1998-04-29 Bigla AG Lit avec couchage réglable en hauteur et inclinaison
FR2773964A3 (fr) * 1998-01-27 1999-07-30 Richard Simonian Lit a hauteur variable lineaire et mecanisme integre dans la boiserie
DE20314474U1 (de) * 2003-09-18 2003-11-20 Kutschera Eberhard Vorrichtung zur Handhabung einer Matratze
US20060021143A1 (en) * 2004-07-29 2006-02-02 Guy Lemire Patient support deck lifting/lowering assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5135350A (en) * 1987-07-27 1992-08-04 Eelman Albert H Method for transporting a patient from an ambulance
DE4323374C1 (de) * 1993-07-13 1994-12-15 Hansa Holz Kontor Horst Rueckl Einlegerahmen für Bettgestelle
EP0838206A1 (fr) * 1996-10-25 1998-04-29 Bigla AG Lit avec couchage réglable en hauteur et inclinaison
FR2773964A3 (fr) * 1998-01-27 1999-07-30 Richard Simonian Lit a hauteur variable lineaire et mecanisme integre dans la boiserie
DE20314474U1 (de) * 2003-09-18 2003-11-20 Kutschera Eberhard Vorrichtung zur Handhabung einer Matratze
US20060021143A1 (en) * 2004-07-29 2006-02-02 Guy Lemire Patient support deck lifting/lowering assembly

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199503, Derwent World Patents Index; Class P26, AN 1995-015189, XP003014732 *
DATABASE WPI Week 199821, Derwent World Patents Index; Class P33, AN 2006-232406, XP003014730 *
DATABASE WPI Week 199938, Derwent World Patents Index; Class P26, AN 1999-446686, XP003014733 *
DATABASE WPI Week 200382, Derwent World Patents Index; Class P26, AN 2003-879698, XP003014731 *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009201485A1 (en) * 2008-05-13 2009-12-03 Wentworth Commercial Furniture Pty Ltd High/low bed
AU2009201485B2 (en) * 2008-05-13 2011-05-12 Wentworth Commercial Furniture Pty Ltd High/low bed
US8176584B2 (en) 2008-08-29 2012-05-15 Hill-Rom Services, Inc. Patient-support apparatus with movable top
WO2011047617A1 (fr) * 2009-10-22 2011-04-28 Chen Jun Mécanisme à tige de raccordement à équilibrage automatique et lit utilisant ce dernier
US9999558B2 (en) 2011-04-11 2018-06-19 Usine Rotec Inc. Piece of furniture, such as an adjustable bed, having an adjustable platform
EP2696833A1 (fr) * 2011-04-11 2014-02-19 Usine Rotec Inc. Élément de mobilier, tel qu'un lit réglable, doté d'une plateforme réglable
EP2696833A4 (fr) * 2011-04-11 2014-10-22 Usine Rotec Inc Élément de mobilier, tel qu'un lit réglable, doté d'une plateforme réglable
US9314385B2 (en) 2011-04-11 2016-04-19 Pratt & Whitney Canada Corp. Piece of furniture, such as an adjustable bed, having an adjustable platform
AU2012243409B2 (en) * 2011-04-11 2016-06-09 Usine Rotec Inc. A piece of furniture, such as an adjustable bed, having an adjustable platform
US9757292B2 (en) 2011-04-11 2017-09-12 Usine Rotec Inc. Piece of furniture, such as an adjustable bed, having an adjustable platform
EP2716270A1 (fr) 2012-10-05 2014-04-09 K.R. Hospitalsudstyr A/S Lit et son utilisation
GB2549378B (en) * 2016-02-26 2019-12-04 Stryker Corp Lift assembly for patient support apparatus
GB2549378A (en) * 2016-02-26 2017-10-18 Stryker Corp Lift assembly for patient support apparatus
US10736803B2 (en) 2016-02-26 2020-08-11 Stryker Corporation Lift assembly for patient support apparatus
US11116683B2 (en) 2016-02-26 2021-09-14 Stryker Corporation Lift assembly for patient support apparatus
US11723825B2 (en) 2016-02-26 2023-08-15 Stryker Corporation Lift assembly for patient support apparatus
US10987260B2 (en) 2017-04-21 2021-04-27 Stryker Corporation Patient handling apparatus with hydraulic control system
US10987268B2 (en) 2017-04-21 2021-04-27 Stryker Corporation Emergency cot with a litter height adjustment mechanism
US11666494B2 (en) 2017-04-21 2023-06-06 Stryker Corporation Patient handling apparatus with hydraulic control system
CN107837113A (zh) * 2017-11-06 2018-03-27 南阳医学高等专科学校第附属医院 一种多方位调节的医用旋转台
US11583455B2 (en) 2019-10-28 2023-02-21 Stryker Corporation Hydraulic valve and system
US11865051B2 (en) 2019-10-28 2024-01-09 Stryker Corporation Hydraulic valve and system
US11896531B2 (en) 2019-10-28 2024-02-13 Stryker Corporation Hydraulic circuit for a patient handling apparatus
US11730650B2 (en) 2019-12-30 2023-08-22 Stryker Corporation Patient support apparatus with hydraulic oscillation dampening

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