EP0725034B1 - Motored trolley for wheelchair stair-lift - Google Patents

Motored trolley for wheelchair stair-lift Download PDF

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Publication number
EP0725034B1
EP0725034B1 EP96101376A EP96101376A EP0725034B1 EP 0725034 B1 EP0725034 B1 EP 0725034B1 EP 96101376 A EP96101376 A EP 96101376A EP 96101376 A EP96101376 A EP 96101376A EP 0725034 B1 EP0725034 B1 EP 0725034B1
Authority
EP
European Patent Office
Prior art keywords
rollers
idle
rail
pair
trolley
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 - Lifetime
Application number
EP96101376A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0725034A1 (en
Inventor
Luigi Turina
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.)
SITES Srl
Original Assignee
SITES Srl
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 SITES Srl filed Critical SITES Srl
Publication of EP0725034A1 publication Critical patent/EP0725034A1/en
Application granted granted Critical
Publication of EP0725034B1 publication Critical patent/EP0725034B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B66B9/0807—Driving mechanisms
    • B66B9/0815—Rack and pinion, friction rollers

Definitions

  • the present invention relates to a motorised trolley of a type hung on a monorail, for use in particular in stair-lifts.
  • Stair-lift motorised trolleys are known in the art which are cantilevered mounted and run along a monorail by means of a pair of bucking rollers which bear on the opposite edges of the monorail.
  • the trolley is moved along the monorail by separate means - such as, for example, a driving wheel - and the bucking rollers are free to rotate.
  • the driving wheel which bears on the rail is linked to a rigid disk which bears in its turn on the means of transmitting the drive.
  • the driving wheels and transmission disk are housed in the base of a "Y"-shaped support frame while the pair of rollers is fitted to the ends of the arms of the "Y" support frame.
  • the known trolleys present some problems, in particular when they are used on inclined rails such as in stair-lifts for the disabled where there is a platform for a wheel-chair.
  • One of these problems is that left-slung trolleys cannot be slung on right-hand rails and vice-versa, so requiring "customised" trolleys for each individual stairs and adding greatly to the cost of the stair-lift.
  • US-A-3966022 discloses a wheelchair lift assembly intended to be installed in stairwells.
  • the lift assembly comprises means for rendering the same adaptable for stairwells of different inclinations, as well as adjustable for use with a right hand as well as a left hand guide and drive rail assembly.
  • the lift assembly comprises a frame member having a horizontally adjustable drive pinion and a vertically adjustable idle pinion in order to hold in horizontal position a supporting platform independently from the inclination of the stairwell on which the lift assembly must be installed.
  • a problem occurs when the inclination of the rails varies due to the steepness of the stairs.
  • DE-A-3334476 discloses a rail conveyor system that enables tight curves to be negotiated during the movement of the conveyor along the rail.
  • This system comprises a drive assembly including two idle rollers bearing against the top of the rail and two driving rollers bearing against the bottom of the rail. These rollers forms constantly spaced pairs, each of which swivels about an axis parallel to the axes of the pairs concerned. Each pair also swivels about another axis normal to these axes and both pairs swivel together about an axis parallel to their own axes and located at the centre between all-four roller axes.
  • the aim of the present invention is to provide a trolley which can overcome the aforementioned problems in a simple and reliable way, by providing trolleys which can be used on any kind of rail without restriction to the degree of inclination of the rail or whether the trolley is slung to the right or the left, which can be used on both horizontal and inclined tracts of rail and which can be adapted rapidly to the rail in function of the radius of curvature of the same.
  • the bucking rollers engage the rail with a groove angle within the range from 95° to 115° in general, and preferably of 105° to 108°.
  • the rollers of each pair are idle and freely rotate on independent sliders fitted to a support frame by means of an endless screw so that the wheelbase of the rollers can be adjusted.
  • the driving wheels are driven by a motor through reduction gears.
  • the trolley 1 comprises a fairing 3 which contains a support frame 4 within which is provided the means of moving the same, viz. a motor 6' and two reduction gearboxes 7, a series of capacitors 8 and the driving wheels 9.
  • the frame 4 is integral with the mounting point 4a on which the load e.g. the stair-lift platform (not shown) is mounted.
  • the frame comprises two arms or bars 5 and 6 whose extremities each house a pair of opposing rollers 10 and 11 bearing on the rail 2 from below and above respectively.
  • a plurality of brushes 12 rubbing against a conductor strip on the rear face of the rail 2 supply current to the driving motor 6'.
  • the trolley according to the invention provides for adjustment of the reciprocal position of the pairs of opposing rollers 10 and 11 in a direction parallel to the rail 2.
  • the extremities of the arms 5 and 6 are "U"-shaped and provide a first housing for the pairs of rollers 10 and 11.
  • the rollers of each pair are idle mounted to rotate freely on sliders 14 (figs. 5 to 7) which are shaped to be a sliding fit in the first housing element and can run along the same.
  • the means of adjusting the roller position is advantageously a screw means which gives continuous adjustement.
  • Figs. 5 to 7 show the pair of rollers housed in the upper end of the arm 5 of the support frame 4.
  • the screw means comprises an endless screw 15 turning in threaded hole tapped through a projection 18 located centrally along the extremity 5, and locked at each extremity by nut and lock-nut pair, acting on the face 14a of the slider 14.
  • a nut is welded onto one end of the lead screw 15 while the other end is provided with a nut and lock-nut pair per se known in the art.
  • a "U"-section plate 19 which extends between the two walls of the slider 14 and a means of locking such as the nuts and bolts 20 and 20' which bear against the outer sides of the housing 5 through pairs of holes bored through the same.
  • holes 21 provided in the latter which extend longitudinally corresponding to the "U" of the plate 19.
  • the trolley is provided with a means of adjusting the wheelbase - the distance between the axles - of a pair of rollers.
  • the wheelbase of the upper pair of rollers is fixed, while the wheelbase of the lower pair of rollers 10 is variable.
  • the two rollers 10 are mounted on two independent sliders 22, provided with a lower threaded part 22a to engage the endless screw 15, which, in this case, works against the head 6a on the housing cut into the extremity of the arm 6.
  • the distance between the sliders 22 is set on assembly and remains so during any subsequent movement of the pair of rollers which is achieved by rotating the screw 15 in a manner similar to that already described above. This wheelbase can also be changed whenever it is necessary.
  • the upper rollers too, to be freely mounted on separate sliders to give greater flexibility in use; generally, it has been found sufficient to adjust only the wheelbase of the lower rollers 10 in the majority of cases.
  • the wheelbase of the upper rollers 11 is between 130 and 160mm and preferably between 145 and 150mm, while that of the lower pair is usually about 130mm.
  • the rollers bear against the rail 2 by means of a groove 23 in the centre of the circumference of the rollers. It has been found that the best working conditions for the groove 23 were obtained using a groove angle ⁇ greater than 90° and between 95° and 115°. Preferred values of angle ⁇ are between 105° and 108°. Furthermore, to reduce friction between the rollers and the rail 2 to a minimum, both the groove and the edge of the rail are curved, with the radius of curvature of the groove being greater than that of the edge of the rail.
  • the trolley according to the invention can be used with all types of rail.
  • the reciprocal position of the pairs of rollers is adjusted depending on the slope, inclination, of the rail, and on whether the rail provides for mounting the trolley on the right (so called right slope) or on the left (so called left slope).
  • the wheelbase of the lower rollers, and optionably of the upper ones is adjusted to suit the radius of curvature of the rail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Handcart (AREA)
  • Chain Conveyers (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
EP96101376A 1995-02-01 1996-02-01 Motored trolley for wheelchair stair-lift Expired - Lifetime EP0725034B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI950162A IT1273480B (it) 1995-02-01 1995-02-01 Carrello motorizzato per montascale
ITMI950162 1995-02-01

Publications (2)

Publication Number Publication Date
EP0725034A1 EP0725034A1 (en) 1996-08-07
EP0725034B1 true EP0725034B1 (en) 2000-08-02

Family

ID=11370374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101376A Expired - Lifetime EP0725034B1 (en) 1995-02-01 1996-02-01 Motored trolley for wheelchair stair-lift

Country Status (4)

Country Link
EP (1) EP0725034B1 (es)
DE (1) DE69609532T2 (es)
ES (1) ES2150604T3 (es)
IT (1) IT1273480B (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2537169T3 (es) 2007-05-02 2015-06-03 Tesis Engineering S.R.L. Salvaescaleras motorizado
DE202015001490U1 (de) 2015-02-25 2015-04-23 Mike Kersten Transporteinrichtung mit vertikaler Bewegungsrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966022A (en) * 1974-10-15 1976-06-29 Cheney Robert W Wheelchair lift assembly
DE3334476A1 (de) * 1983-09-21 1985-04-11 César Arth Rigert Foerdersystem zur ueberwindung von hoehenunterschieden
DE4211870C1 (en) * 1992-04-08 1993-06-24 Gerd Dipl.-Ing. 4930 Detmold De Grass Drive for stairs lift - has load accommodation device displaceably arranged on guide rod guided with roller guides on upper and lower guide tubes

Also Published As

Publication number Publication date
EP0725034A1 (en) 1996-08-07
IT1273480B (it) 1997-07-08
ES2150604T3 (es) 2000-12-01
DE69609532D1 (de) 2000-09-07
ITMI950162A0 (it) 1995-02-01
ITMI950162A1 (it) 1996-08-01
DE69609532T2 (de) 2001-04-19

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