EP4491561A2 - Treppenlift - Google Patents

Treppenlift Download PDF

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Publication number
EP4491561A2
EP4491561A2 EP24213983.0A EP24213983A EP4491561A2 EP 4491561 A2 EP4491561 A2 EP 4491561A2 EP 24213983 A EP24213983 A EP 24213983A EP 4491561 A2 EP4491561 A2 EP 4491561A2
Authority
EP
European Patent Office
Prior art keywords
latch
seat
gear
worm
frame
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.)
Pending
Application number
EP24213983.0A
Other languages
English (en)
French (fr)
Other versions
EP4491561A3 (de
Inventor
Arnoldus Theodorus Van Der Heiden
Dennis VARKEVISSER
Cornelis BOXUM
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.)
TK Home Solutions BV
Original Assignee
TK Home Solutions BV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=53385898&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP4491561(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by TK Home Solutions BV filed Critical TK Home Solutions BV
Publication of EP4491561A2 publication Critical patent/EP4491561A2/de
Publication of EP4491561A3 publication Critical patent/EP4491561A3/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/06—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces
    • B66B9/08—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons
    • B66B9/0838—Levelling gears

Definitions

  • the present invention relates to a stair lift, in particular chair stair lift.
  • stair lifts in general comprise a rail, which forms the track along a stair, which rail may in numerous situations be curved.
  • the seat of the stair lift follows the curved rail, which may lead to some rocking or inclement of the seat during movement.
  • the seat may therewith incline too, which causes the risk of a person sliding off the seat.
  • a provision may be present for balancing the seat.
  • Such provision may be an automated balancing system, with electr(on)ic actuators.
  • actuators may unexpectedly refuse or fail, which leads to dangerous situations.
  • the risk of failing is quite high in systems comprising a worm drive for leveling the seat. After years of operation the worm drive may be worn out, so that the worm may suddenly disengage the gear of the worm drive.
  • the invention thereto proposes a stair lift, comprising at least one rail extending along a track, a frame, suspended on the at least one rail, and comprising a drive, for moving the frame along the rail, a support for a seat, movable, in particular pivotable with respect to the support, a balancing system, for keeping the seat in a predetermined orientation with respect to a fixed world and a lock for locking the movement of the seat with respect to the support.
  • the locking system prevents the seat to get in undesired angles with respect to the frame, and thus indirectly with respect to the fixed world.
  • the lock may be a separate part of the stair lift, and not - for instance - just a software routine in the balancing system.
  • the lock may be a mechanical lock, which, at least in order to activate, does not comprise electronic actuators.
  • the brake is spring biased.
  • the lock is configured to lock the movement of the seat with respect to the frame when the seat is moved more than a predetermined angle.
  • the lock may comprise detection means for detecting that the predetermined angle was reached. In particular these may be mechanical detection means, such as a hole or protrusion.
  • the predetermined angle may be defined with respect to the frame, or with respect to the fixed world, and may for instance be 5 or in particular 10 degrees.
  • the lock comprises a latch.
  • Such latch may be spring-biased, and may comprise an actuator for unlocking the actuator.
  • the spring based latch may engage with a hole, positioned such that the latch locks thanks to the spring when the predetermined angle is reached.
  • the lock comprises a brake, which may in particular be a drum brake or a disk brake.
  • the lock may further be configured for disabling the balancing system when it is locked, or initiate an immediate correction of the balancing system when the predetermined angle was reached, in order to prevent a person positioned in the locked angle for a long time.
  • the latch in a locked state is torque proof connected with a counterpart, in particular a gear.
  • the latch may be connected to the frame, and the counterpart may be connected to the seat, or vice versa.
  • the frame and the seat are torque proof connected with each other.
  • the lock may further be configured for disabling a drive, for moving the frame part along the rail when it is locked, so that no person is moved with the lift while sitting under an angle.
  • the balancing system comprises a worm drive, having a worm spidle and a worm gear engaging each other.
  • the worm spindle is mounted at the support and driven by a motor.
  • the worm gear is mounted to the seat.
  • the lock comprises an anchor, which can be brought into torque proof engagement with the worm gear, in particular with the worm teeth of the worm gear.
  • the anchor may be attached to the frame.
  • the worm drive further comprising a worm spindle engaging the worm gear
  • the worm gear has a at least one first area for exclusively engaging with the worm spindle
  • the worm gear has at least one second area for exclusively engaging with the latch.
  • the latch mechanism may be configured as a self-energizing mechanism. That means that in case of engagement of the latch, the force which keeps the latch in its locked state will increase if the seat tends to further deflect from the horizontal orientation (inclination increases).
  • the latch in a locked state is adapted to follow the movement of the counterpart and being biased by the counterpart against a biasing element, in particular a biasing face, the biasing face is adapted to additionally bias the latch into its locked position, in particular in a radial direction to the center of the gear. So the further the seat is deflected from its horizontal position, the further the latch is biased against the biasing face, the further the biasing face biases the latch in direction of the center of the gear and thus into the locked state.
  • a biasing element in particular a biasing face
  • Figure 1 shows a stair lift in a desired uninclined position.
  • the stair lift comprises a rail 1 extending along a track, a frame 2, suspended on the rail 1, and a drive (not visible), for moving the frame 2 along the rail; a support 7 for a seat 3, which is movable, in particular pivotable with respect to the frame 2.
  • the stair lift 1 comprises a balancing system 4, for keeping the seat in a predetermined uninclined orientation with respect to a fixed world, provided with a lock for locking the movement of the seat with respect to the frame 2. Embodiments of the lock are depicted in figures 3 to 7 .
  • Figure 2 shows a the stair lift from figure 1 in an undesired inclined position
  • Figure 3 shows a first embodiment of a brake for the stair lift from figures 1 and 2 , wherein the brake comprises a drum brake 5.
  • Figure 4 shows a second embodiment of a brake for the stair lift from figure 1 and 2 , wherein the brake comprises a disk brake 6.
  • Figure 5 shows a third embodiment of a brake for the stair lift form figure 1 and 2 .
  • the brake comprises a latch 14 in the form of an anchor 14.
  • the balancing system 4 comprises a worm drive 10 having a worm spindle 11 and a worm gear 12.
  • the worm spindle 11 is driven by a balancing motor M and is mounted at the frame 2.
  • the spindle 11 is in engagement with the worm gear, which is connected to the seat 3.
  • the further the gear 12 is rotated against the spindle 11 the further the seat 3 is angled against the frame 2.
  • the latch 14 is mounted on the frame 2.
  • the seat 3 is rotationally fixed to the frame 2, only a limited turn of approx. 2° may be possible, caused by an optional linear guiding 19, which is pivotably flexible in small amount, as described later with reference to figure 7 .
  • the latch 14 is biased by a loading spring 16 into a locked position.
  • Figure 5 shows the latch 14 in its unlocked position.
  • an actuator 17 in particular a solenoid actuator, is provided for holding the latch 14 in its unlocked position.
  • the actuator 17 is deactivated, so that the loading spring 16 can urge the latch 14 into its locked position, as illustrated in figure 6 .
  • the deactivation can be initiated with the help of an orientation sensor system, e.g. as explained in the European patent application 16154071.1 (not published yet).
  • the latch 14 is supported in the housing 18 of the frame 2 by means of a linear guiding 19.
  • the guiding 19 is supported flexibly in the housing 18 by means of centering means 21.
  • the centering means 21 can be realized by springs or by any elastic material, which may produce an elastic counteracting force compression.
  • the linear guiding 17 can be deflected in a small amount perpendicular to the main direction (double arrow P, fig. 6 ) of the linear guiding 19.
  • the latch 14 can follow the rotational movement of the gear 12 (see figure 7 ).
  • a biasing face 20 is provided, against which the latch 14 is biased during following.
  • the biasing face 20 is inclined radially towards the center of the gear 12, so that upon contact between the latch 14 and the biasing face 20 the latch 14 is biased against the gear 12, additionally to the loading force of the loading spring 16. So the brake is in this embodiment designed self-energizing using of the weight of the seat including any load sitting on the seat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Seats For Vehicles (AREA)
  • Types And Forms Of Lifts (AREA)
EP24213983.0A 2015-04-21 2016-04-21 Treppenlift Pending EP4491561A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL2014685A NL2014685B1 (en) 2015-04-21 2015-04-21 Chair Stair Lift.
EP20154022.6A EP3683180B1 (de) 2015-04-21 2016-04-21 Treppenlift
PCT/EP2016/058867 WO2016170038A1 (en) 2015-04-21 2016-04-21 Stair lift
EP16717925.8A EP3286123B1 (de) 2015-04-21 2016-04-21 Treppenlift

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP16717925.8A Division EP3286123B1 (de) 2015-04-21 2016-04-21 Treppenlift
EP20154022.6A Division EP3683180B1 (de) 2015-04-21 2016-04-21 Treppenlift
EP20154022.6A Previously-Filed-Application EP3683180B1 (de) 2015-04-21 2016-04-21 Treppenlift

Publications (2)

Publication Number Publication Date
EP4491561A2 true EP4491561A2 (de) 2025-01-15
EP4491561A3 EP4491561A3 (de) 2025-03-05

Family

ID=53385898

Family Applications (3)

Application Number Title Priority Date Filing Date
EP20154022.6A Active EP3683180B1 (de) 2015-04-21 2016-04-21 Treppenlift
EP16717925.8A Active EP3286123B1 (de) 2015-04-21 2016-04-21 Treppenlift
EP24213983.0A Pending EP4491561A3 (de) 2015-04-21 2016-04-21 Treppenlift

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP20154022.6A Active EP3683180B1 (de) 2015-04-21 2016-04-21 Treppenlift
EP16717925.8A Active EP3286123B1 (de) 2015-04-21 2016-04-21 Treppenlift

Country Status (4)

Country Link
EP (3) EP3683180B1 (de)
ES (2) ES3006834T3 (de)
NL (1) NL2014685B1 (de)
WO (1) WO2016170038A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2017842B1 (en) * 2016-11-23 2018-05-28 Ooms Otto Bv An apparatus for transporting a load from a first to a second level, in particular a stairlift
GB2565076B (en) * 2017-07-31 2022-03-02 Stannah Stairlifts Ltd Improvements in or relating to stairlifts
NL2022914B1 (en) * 2019-04-10 2020-10-20 Otolift Trapliften B V An apparatus for transporting a load from a first to a second level, in particular a stairlift
NL2023263B1 (en) * 2019-06-05 2020-12-22 Otolift Trapliften B V An apparatus for transporting a load from a first to a second level
DE102020125242B4 (de) 2020-09-28 2025-03-13 S.C. Hawle H S.R.L. Fahreinheit für einen Treppenlift mit Sicherungsvorrichtung
US11505429B2 (en) * 2020-11-19 2022-11-22 Harmar Mobility, Llc Stairlift overspeed safety systems
US11603287B2 (en) 2020-11-19 2023-03-14 Harmar Mobility, Llc Stairlift overspeed safety systems
NL2033120B1 (en) * 2022-09-23 2024-03-29 Otolift Trapliften B V Apparatus for transporting a load, in particular a stairlift
NL2033908B1 (en) * 2023-01-04 2024-07-16 Handicare Stairlifts B V Stairlift comprising a safety system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037846A1 (de) 1997-12-11 2000-09-27 Thyssen De Reus B.V. Treppenaufzug
WO2014098573A2 (en) 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Stair lift drive system for a smooth dented rail
WO2014098574A1 (en) 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Stair lift drive
WO2014098575A1 (en) 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Stair lift drive with rotatable mounting part for seat

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190625529A (en) 1906-11-12 1907-09-29 Hugo Harry Busch Improvements in Safety Apparatus for Elevator Cars.
GB286243A (en) 1927-03-01 1929-06-05 Waygood Otis Ltd Improvement in elevator safety system
GB299874A (en) 1927-11-04 1929-10-10 Waygood Otis Ltd Improvement in elevator safety appliance
US3762512A (en) 1971-10-29 1973-10-02 Us Elevator Corp Elevator rail grab safety apparatus
FI96838C (fi) 1994-10-21 1996-09-10 Kone Oy Hissin turvajarru
GB2322450A (en) * 1997-02-20 1998-08-26 Peter John Jones Annular ring inclinometer
ES2154200B1 (es) 1998-12-22 2001-11-01 Dynatech Dynamics & Technology Sistema de frenado de emergencia para ascensores, de doble efecto, ascendente y descendente.
WO2005113402A1 (ja) 2004-05-20 2005-12-01 Mitsubishi Denki Kabushiki Kaisha エレベータの非常止め装置
ES2284356B1 (es) 2005-10-14 2008-09-16 Thyssenkrupp Elevadores, S.A. Aparato de frenado de emergencia de doble efecto para cabinas de ascensores.
JP4893628B2 (ja) 2006-03-08 2012-03-07 三菱電機株式会社 エレベータの非常止め装置
MY143851A (en) 2006-12-05 2011-07-15 Inventio Ag Braking device for holding and braking a lift cabin in a lift facility
GB0709551D0 (en) * 2007-05-18 2007-06-27 Stannah Stairlifts Ltd Improvements in or relating to stairlifts
GB2484709B (en) * 2010-10-21 2014-06-04 Handicare Accessibility Ltd Stairlift
GB201103716D0 (en) * 2011-03-04 2011-04-20 Stannah Stairlifts Ltd Improvements in or relating to stairlifts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037846A1 (de) 1997-12-11 2000-09-27 Thyssen De Reus B.V. Treppenaufzug
WO2014098573A2 (en) 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Stair lift drive system for a smooth dented rail
WO2014098574A1 (en) 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Stair lift drive
WO2014098575A1 (en) 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Stair lift drive with rotatable mounting part for seat

Also Published As

Publication number Publication date
EP3286123A1 (de) 2018-02-28
EP3286123B1 (de) 2020-04-08
NL2014685A (en) 2016-10-24
EP3683180A1 (de) 2020-07-22
EP4491561A3 (de) 2025-03-05
ES3006834T3 (en) 2025-03-19
WO2016170038A1 (en) 2016-10-27
ES2794826T3 (es) 2020-11-19
NL2014685B1 (en) 2017-01-25
EP3683180B1 (de) 2024-11-20
EP3683180C0 (de) 2024-11-20

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