EP3335685A1 - Dispositif de levage ayant un verrou de sécurité et système de libération - Google Patents

Dispositif de levage ayant un verrou de sécurité et système de libération Download PDF

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Publication number
EP3335685A1
EP3335685A1 EP16204008.3A EP16204008A EP3335685A1 EP 3335685 A1 EP3335685 A1 EP 3335685A1 EP 16204008 A EP16204008 A EP 16204008A EP 3335685 A1 EP3335685 A1 EP 3335685A1
Authority
EP
European Patent Office
Prior art keywords
cart
bracket
hoist
rail
wheels
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
EP16204008.3A
Other languages
German (de)
English (en)
Other versions
EP3335685B1 (fr
Inventor
Richard Christiansen
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.)
Groupe Winncare
Original Assignee
Winncare Nordic Aps
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 Winncare Nordic Aps filed Critical Winncare Nordic Aps
Priority to EP16204008.3A priority Critical patent/EP3335685B1/fr
Priority to PCT/DK2017/050431 priority patent/WO2018108221A2/fr
Publication of EP3335685A1 publication Critical patent/EP3335685A1/fr
Application granted granted Critical
Publication of EP3335685B1 publication Critical patent/EP3335685B1/fr
Active 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
    • A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/104—Devices carried or supported by
    • A61G7/1042—Rail systems
    • 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
    • A61G7/1015—Cables, chains or cords

Definitions

  • the present invention relates to a hoist, preferably for use in a ceiling mounted rail, where said hoist comprises a trolley with wheels arranged to run along a rail.
  • the hoists When lifting persons in hoists, the hoists usually comprises a sling in which the person is lifted.
  • the sling is usually suspended in a bracket, which is mounted on the hoist system.
  • the hoist system may be suspended in a rail system or mounted on a stationary or moveable portal.
  • the rails and the trolley allow for horizontal movement, while the hoist unit provides for vertical movement, i.e. up-down movements.
  • Permanently mounted hoists are often provided in rail systems, which are usually provided under the ceiling.
  • the rails are e.g. fastened to the ceiling or mounted in fittings which are attached to the ceiling or a wall structure.
  • the rails usually comprise at least one surface on which one or more wheels of a hoist cart are arranged in order to suspend the hoisting mechanism.
  • the cart is suspended in the rail and rests on the wheels, which run on the surface of the rail.
  • the hoist system comprises one or more motion wheels which engage a friction surface on another surface of the rail.
  • the motion wheel or wheels are powered by a motor, such as an electric motor, which may be driven by a battery or by being connected to a power source.
  • the motion wheels are pressed against the surface to ensure that the motion wheels engage the rail and allow the hoist to move along the rails when the motor is activated.
  • the motion wheels may be pressed against the rail by means of a spring.
  • a hoist preferably for use in a ceiling mounted rail
  • said hoist comprises a trolley with one or more wheels arranged to run along a first running surface of a rail.
  • Said trolley comprises one or more drive wheels and one or more carrying wheels.
  • the one or more carrying wheels are rotatably fixed on a cart.
  • One or more drive wheels are rotatably fixed to a bracket and said bracket is pivotably connected via a hinge to the cart.
  • Said trolley comprises a spring member having a first end connected to the cart and second end connected to the bracket provided for pressing the one or more drive wheels against a running surface on the rail.
  • a shaft with an eccentric cam is rotatably mounted in the bracket, where said eccentric cam upon rotation of the shaft acts against a surface on the cart for rotation of the bracket in relation to the cart in the hinge whereby said one or more drive wheels are released from contact with the running surface, whereby the one or more carrying wheels and are able to rotate freely along the rail.
  • This provides a safety locking and releasing system for the trolley in relation to the rails, which is very reliable because it is construed entirely of mechanical elements and is therefore unlikely to break or otherwise malfunction.
  • the trolley comprises a cart and a bracket.
  • the bracket is hinged to the cart as described further below.
  • the cart is preferably a plate shaped member with an upper end portion arranged to be attached to said one or more carrying wheels.
  • the plate member comprises an attachment point for the hinge member.
  • the hinge member may comprise a rod, a bolt or a stay arranged between side plates of the bracket member and attached at each end to each of the side plates of the bracket (as discussed further below).
  • the hinge member then extends through a hole through the plate member of the cart.
  • Said attachment point for the hinge member is preferably arranged near the front end or rear end of the cart (when seen in the travelling direction in the rail).
  • the bracket m comprises two parallel plate shaped members between which one or more additional spacers, such as rods, bolts, plate members or stays may be provided if necessary for improving stability. This allows for providing a space between the two sides of the bracket.
  • the cart is preferably mounted in the space between the side plates of the bracket.
  • the cart is arranged in a plane which is parallel to the planes of the side plates of the bracket.
  • Said shaft with the eccentric cam is preferably also arranged perpendicularly to said plate shaped members.
  • the eccentric cam member and the cart are aligned in the same plane in the space between the side plates of the bracket.
  • the spring member is attached at one end to the cart and at the other end the spring is attached to the bracket.
  • the spring member is present to ensure that the drive wheels are pressed against the second running surface on the rail.
  • Said second running surface is usually provided on the lower outside surface of the rail.
  • the bracket comprises a spring attachment member, which is preferably arranged perpendicularly to said plate shaped members of the bracket.
  • the cart comprises attachment means for the spring member.
  • the spring attachment means are preferably arranged in the opposite end of the cart in relation to the attachment of the hinge member.
  • the outer radius of the eccentric cam acts on an opposite surface of the cart.
  • the bracket is rotated about the hinge element and is thus rotated in relation to the cart, which remains essentially in the same position in relation to the rail.
  • the eccentric cam acts against the force from the spring which presses the drive wheels against the second running surface on the rail, whereby the grip against the rail is released.
  • the hoist trolley can be moved manually along the rail by a person pushing or pulling the hoist along the rail e.g. by pushing or pulling in a sling in which a person is suspended. This will for example allow for moving a person present in the hoist in the event that there is a power shortage or in case a battery/accumulator of runs out of power.
  • the braking and release system according to the present invention provides an entirely mechanical solution, which is independent of any power supply. Further, the braking and release system according to the present invention is inexpensive and very reliable.
  • an actuator such as a handle
  • the shaft carrying the eccentric cam for operation of the shaft and the eccentric cam, which enables manual actuation of the safety release system.
  • the shaft carrying the eccentric cam of the shaft and the eccentric cam is rotated by a motor.
  • the motor may be the same motor which powers the drive wheels or a separate motor, such as an electrically driven motor as discussed below in relation to the drive motor.
  • This allows for releasing the grip from the rails by the drive wheels by means of the hand held control unit, e.g. when a manual adjustment of the position of the hoist is required.
  • the brake and release system i.e. the braking and the release of holding the hoist trolley to the rail, from a hand held control unit.
  • the one or more drive wheels are preferably also mounted in the space between the side plates of the bracket in a rotatable manner, whereby they are aligned with the second running surface on the rails. If two drive wheels are used, it is preferred that one is arranged between each of the sides of the cart and the respective opposite side plate of the bracket, because this provides for a stable construction which does not tilt in the rail.
  • the motor unit is preferably fixed to the hinged bracket and acts on the drive wheels to provide a driving force to the drive wheels, which allows for motorized transport in the along the rails.
  • the motor is e.g. electrically driven by means of a battery, an accumulator or similar preferably rechargeable means for providing electrical power to the motor. Where suitable, the motor may also be connected to a power source by means of a cord. The same motor or another motor may provide for up/down movement of the sling.
  • the driving and/or lifting action may be controlled on buttons on the hoist unit itself or from a hand held control unit, which may be attached to the hoist by a cord or alternatively in wireless mode.
  • the hoist is arranged in a rail of the hollow-profile-type, where said hollow profile comprises a slit in the bottom and one or more running surfaces for the carrying wheels arranged in the interior of the hollow profile, and wherein said cart with the carrying wheels are introduced into the hollow profile and that the cart extends through the slit.
  • the cart extends downward from the rail through the slit and the hoisting unit is attached to the cart in a well-known manner, whereby the rails can be mounted in the ceiling or near the ceiling and the hoist is suspended from the rail.
  • the spring member is preferably a helical spring, a gas spring, a rubber spring or a rubber band.
  • the spring may act by providing a pulling or a pushing force between the attachment points on the cart and the bracket.
  • the spring force In order to allow for sufficient pulling force during normal traction of the hoist, including any person which is lifted by the hoist, along the rails by means of the motor, it is necessary to ensure that the spring force presses the drive wheels relatively firmly against the second running surface of the rail.
  • the spring force should be low enough to allow a person rotating a manually operated handle to allow the eccentric cam to act against the spring force.
  • a helical spring having a thread diameter of 2.8-3.3 mm; an outer diameter of 18-20 mm; an unstressed length of 50-65mm and in particular 55-60 mm and a maximal pulling force of 275-325 N may be applicable in a hoist arrangement being suitable for moving persons up to 275 kg.
  • a hoist 1 for use in a ceiling mounted rail 2 generally comprises a trolley 3, and a hoist unit 4.
  • the hoist unit 4 is suspended under the trolley 3, which runs in the rail 2, and comprises a wire, strap or the like which can be lowered and raised to lift a physically impaired person.
  • a sling (not shown) can be attached to the end of the hoist unit strap/wire 5, e.g. by means of a hook-like element 6.
  • the hoist 1 is arranged in a rail 2 of the hollow-profile-type, where said hollow profile comprises a slit (not shown) in the bottom of the rail 2.
  • the rail comprises a first running surface, 2a (see figs. 5a-d ) arranged on the upper inside of the bottom wall of the hollow profile of the rail 2.
  • the lower and outside surface of the lower wall provides a second running surface 2b for drive wheels 14, see below.
  • the trolley 3 comprises a cart 7 and a bracket 8 on which a drive motor 9 is attached.
  • the trolley 3 is shown in assembled form in fig. 3 and in an exploded view in fig. 4 .
  • the cart 7 is shown in fig. 1 .
  • the cart generally comprises a plate element 10 with one or more suspension wheels 11 arranged in rotatable manner to the top end of the plate element 10.
  • two suspension wheels 11 are arranged on a common wheel shaft 12 with one wheel 11 on each side of the upper end of the plate element 10.
  • the cart is shown with four suspension wheels arranged in two sets of suspension wheels 11 although it may be possible to provide more or less suspension wheels 10 on the cart 7 whenever appropriate, e.g. by arranging suspension wheels 11 on one side of the cart 7 only.
  • the suspension wheels 11 are intended to be supported by the first running surface 2a of the rail 2.
  • the cart 7 with the carrying wheels 11 is introduced into the hollow profile of the rails 2 and part of the cart 7 extends through the slit and below the rail 2.
  • the carrying wheels 11 are arranged in the interior of the hollow profile, and are supported by the first running surface 2a.
  • the bracket 8 is hinged to the cart 7 as described further below.
  • the bracket 8 preferably comprises two parallel plate shaped members 13a, 13b between which one or more spacers, such as rods, bolts, plate members or stays may be provided.
  • Fig. 2a-2b shows the bracket 8.
  • Drive wheels 14 are rotatably fixed to the bracket 8, e.g. by means of a drive wheel shaft 15.
  • the drive wheels are preferably arranged between the side plates 13a, 13b of the bracket to align the drive wheels with the second running surface 2b of the rail 2.
  • the bracket 8 is pivotably connected via a hinge connection 16 to the cart 7.
  • the hinge may comprise a rod 17, which is attached between the two side plates 13a- 13b.
  • the hinge rod 17 extends through a corresponding hole 18 in the cart 7 (see fig. 1 ) in which the hinge rod 17 is rotatable to provide the hinged connection 16.
  • the plate member 10 On the cart 7, below the attachment points of the suspension wheels 11, the plate member 10 comprises the hole 18 as the attachment point for the hinge member is preferably arranged near the front end or rear end of the cart 7 (when seen in the travelling direction in the rail).
  • An arm 19 with a notch 20 extends in the opposite end of the cart and provides an attachment point for the spring member 20.
  • the trolley 3 comprises a spring member 21 (see fig. 3-4 ) having a first end connected to the notch 20 in the cart 7 and the second end connected to the bracket 8.
  • the spring 21 is provided for pressing the drive wheels 14 against the running surface 2b on the rail 2.
  • the spring 21 is a helical spring member with attachment means provided at each end of the spring 21.
  • the motor 9 acts on the drive wheels 14.
  • the spring force from the spring 21 presses the drive wheels 14 against the rails, which provides a braking effect on the hoist, which cannot be moved when the motor is off and the drive wheel(s) 14 are pressed against the rail 2.
  • a cam shaft 22 with an eccentric cam 23 is rotatably mounted in the bracket 8.
  • the outer radius of the eccentric cam 23 acts on an opposite surface 27 of the cart.
  • the eccentric cam 23 acts against a lower end surface 27 on the cart 7.
  • the eccentric cam is shown to act on the lower end surface 27 of the arm 19 for rotation in the hinge 16 of the bracket 8 as shown by arrow A (see figs. 3 and especially 5b and 5d) in relation to the cart 7.
  • the drive wheel(s) 14 are released from contact with the second running surface 2b of the rail as can be seen in fig. 5d .
  • the one or more suspension wheels 11 are able to rotate freely along the rail 2.
  • the hoist 1 can be moved freely along the rail 2 when the drive wheels are released from contact with the rail 2.
  • This further allows for an assisting person to manually push or pull the hoist along the rail whereby the person in the hoist can be moved even though the motor is inactive, e.g. because of low battery power of a (not shown) battery pack.
  • the cart 7 is mounted between the side plates 13a, 13b of the bracket 8.
  • the eccentric cam 23 and the cart 7 are aligned in the same plane between the side plates 13a, 13b of the bracket 8.
  • the bracket comprises a spring attachment member 25, e.g. a hook, which is preferably arranged on a spacer member 26, between the side plates of the bracket 8.
  • the braking and release system according to the present invention provides an entirely mechanical solution, which is independent of any power supply. Further, the braking and release system according to the present invention is inexpensive and very reliable.
  • a handle is attached to the end 24 of the cam shaft carrying the eccentric cam 23.
  • the shaft carrying the eccentric cam of the shaft and the eccentric cam is rotated by an actuator, e.g. a motor (not shown).
  • the spring 21 may be a pushing spring which pushes the bracket into a rotational movement in the hinge 16 in order to ensure that the drive wheel or wheels 14 contact the second running surface 2b of the rail.
  • the spring 21 and the eccentric cam 23 are arranged on the upper side of the arm 19. The arm will be attached at a lower position on the cart 7 in order to ensure that enough space is provided between the bracket 8 and the rail 2 to ensure proper rotation of the bracket 7 and thus to ensure that the drive wheels 14 contact the second running surface 2b of the rail 2 upon rotation of the bracket 7.

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)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Invalid Beds And Related Equipment (AREA)
EP16204008.3A 2016-12-14 2016-12-14 Dispositif de levage ayant un verrou de sécurité et système de libération Active EP3335685B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16204008.3A EP3335685B1 (fr) 2016-12-14 2016-12-14 Dispositif de levage ayant un verrou de sécurité et système de libération
PCT/DK2017/050431 WO2018108221A2 (fr) 2016-12-14 2017-12-14 Appareil de levage comprenant un système de verrouillage et de libération de sécurité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16204008.3A EP3335685B1 (fr) 2016-12-14 2016-12-14 Dispositif de levage ayant un verrou de sécurité et système de libération

Publications (2)

Publication Number Publication Date
EP3335685A1 true EP3335685A1 (fr) 2018-06-20
EP3335685B1 EP3335685B1 (fr) 2020-01-29

Family

ID=57570299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16204008.3A Active EP3335685B1 (fr) 2016-12-14 2016-12-14 Dispositif de levage ayant un verrou de sécurité et système de libération

Country Status (2)

Country Link
EP (1) EP3335685B1 (fr)
WO (1) WO2018108221A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210298976A1 (en) * 2020-03-27 2021-09-30 Liko Research & Development Ab Transfer Assembly for a Hoist
KR20220074443A (ko) * 2020-11-27 2022-06-03 주식회사 삼인이엔지 경량레일형 이송호이스트장치
US11542128B2 (en) 2018-12-11 2023-01-03 Liko Research & Development Ab Subject lift transfer assemblies and methods for operating the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110777249A (zh) * 2019-11-11 2020-02-11 中铁第四勘察设计院集团有限公司 一种中间驱动的整体式钢轨激光强化车
US11759384B2 (en) 2021-06-15 2023-09-19 Larry A. Mitschke System for assisting mobility-impaired individual and methods of use

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498236A (en) * 1968-03-12 1970-03-03 Lonnie E Meek Self-propelled cable supported carriage
US4372452A (en) * 1980-12-24 1983-02-08 Independent Transfer Equipment Co. Transfer hoist for disabled persons
EP1840073A1 (fr) * 2006-03-29 2007-10-03 Invacare International Sàrl Convoyeur suspendu

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498236A (en) * 1968-03-12 1970-03-03 Lonnie E Meek Self-propelled cable supported carriage
US4372452A (en) * 1980-12-24 1983-02-08 Independent Transfer Equipment Co. Transfer hoist for disabled persons
EP1840073A1 (fr) * 2006-03-29 2007-10-03 Invacare International Sàrl Convoyeur suspendu

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11542128B2 (en) 2018-12-11 2023-01-03 Liko Research & Development Ab Subject lift transfer assemblies and methods for operating the same
US20210298976A1 (en) * 2020-03-27 2021-09-30 Liko Research & Development Ab Transfer Assembly for a Hoist
US12127988B2 (en) * 2020-03-27 2024-10-29 Liko Research & Development Ab Transfer assembly for a hoist
KR20220074443A (ko) * 2020-11-27 2022-06-03 주식회사 삼인이엔지 경량레일형 이송호이스트장치

Also Published As

Publication number Publication date
WO2018108221A2 (fr) 2018-06-21
EP3335685B1 (fr) 2020-01-29
WO2018108221A3 (fr) 2018-08-02

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