EP1149041B1 - Safety brake for stairlifts - Google Patents
Safety brake for stairlifts Download PDFInfo
- Publication number
- EP1149041B1 EP1149041B1 EP00900295A EP00900295A EP1149041B1 EP 1149041 B1 EP1149041 B1 EP 1149041B1 EP 00900295 A EP00900295 A EP 00900295A EP 00900295 A EP00900295 A EP 00900295A EP 1149041 B1 EP1149041 B1 EP 1149041B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide surface
- governor
- braking member
- carriage
- rail
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/044—Mechanical overspeed governors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
-
- 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
Definitions
- This invention relates to stair mounted elevators or lifts, commonly known as stairlifts.
- the invention relates to a governor or speed-limiting device to control or brake movement of a stairlift carriage in the event that some failure or malfunction in the drive mechanism, driving the carriage along a stairlift rail, allows the carriage to exceed a predetermined maximum speed.
- Stairlifts in the form of a carriage mounted for movement along a rail, are well known for moving aged or handicapped persons up and down staircases.
- stairlifts incorporate a drive motor in the carriage, the output of which engages a rack, extending along the rail, via a gearbox.
- the carriage may be left to travel down the sloping rail in an uncontrolled manner.
- stairlifts incorporate an overspeed governor to automatically apply a braking force in the event that component failure or malfunction allows the carriage to exceed a predetermined speed whilst moving down the rail.
- these devices have tended to be quite complex in form and have only been able to apply a braking force when the carriage is moving in one direction.
- a different governor must be used depending on which side of the stairway the stairlift apparatus is mounted.
- US-4046226 discloses a governor for a stairlift carriage, said carriage being movable along a stairlift rail in two directions, the governor including a braking member and operating means operable when the speed of the carriage exceeds a predetermined maximum, to cause the braking member to engage the rail.
- the invention provides a governor for governing the speed of a stairlift carriage along a stairlift rail, said carriage being movable along a stairlift rail in two directions, said governor including:
- said operating means is constructed and arranged to induce said roller to leave said first guide surface under the influence of a force induced centrifugally.
- roller is mounted for rotation on a first end of an operating lever, the other end of said operating lever being pivotally mounted to said braking member.
- said braking member is mounted for rotation about the same axis as said first guide surface, said braking member having cam surfaces which are non-concentric with respect to said axis of rotation.
- said first guide surface comprises an inner guide surface
- said operating means further including an outer guide surface, said roller contacting said inner guide surface when the speed of said carriage is below said predetermined maximum, and contacting said outer guide surface when said speed exceeds said predetermined maximum, said outer guide surface being constructed and arranged to allow the position of roller to be locked with respect to said first guide surface.
- said outer guide surface includes at least one locking notch sized to receive said roller.
- said operating means further includes a flywheel, said first guide surface and said outer guide surface being formed in said flywheel.
- said braking member has a central, inoperative position in which said braking member is symmetrical about an axis passing through the axis of rotation thereof.
- said governor further includes a catch to retain said braking member, against rotation, in said central position when not under the influence of said operating means.
- the invention provides a stairlift carriage including the governor set forth above.
- the present invention provides a governor 5 for a stairlift carriage (not shown), the carriage being moveable, in the conventional manner, along a rail, a surface of which is indicated by reference numeral 6 in the drawings.
- the rail surface 6, in this embodiment is aligned at 45 ° to the horizontal.
- the governor 5 includes a mounting bracket 7 which forms the basis of the governor.
- the bracket 7 comprises an angled upper mounting section 8 so configured that when section 8 is mounted on a vertical side plate 9 of the carriage, the locking members of the governor (described in detail below) are arranged to engage rail surface 6 aligned at 45 ° to the horizontal.
- the mounting section 8 extends down into a lower section 10.
- a bearing journal 11 mounted on, and extending through, the lower section 10 is a bearing journal 11 in which shaft 12 is rotatably mounted.
- a drive gear 13 mounted at one end of the shaft 12 is a drive gear 13.
- the drive gear 13 is configured and mounted so as to engage a drive rack 13a extending along the rail surface 6, the drive rack forming part of the main drive system serving to power the stairlift carriage along the rail.
- a flywheel 14 mounted at the opposite end of shaft 12, so as to rotate with drive gear 13, is a flywheel 14 forming part of an operating means which will be described in greater detail below.
- the governor further includes a braking member 15 which is rotatable on the outer surface of the journal 11, is thus independent of the drive gear 13, and is displaced about journal 11 by a link arm 16.
- Link arm 16 is pivotally mounted, at one end thereof, on the braking member 15 and includes, at its other end, a roller 17.
- the roller 17 engages in guide track 18 ( Figure 4) provided on the inner surface of flywheel 14, thereby connecting the flywheel 14 to the braking member 15.
- the connection is a sliding connection for so long as the speed of the carriage is below the predetermined maximum speed, but becomes a fixed connection in the event the speed of the carriage exceeds the predetermined maximum.
- arrangement of the arm 16 and roller 17 is such that the roller normally rests, under gravity, on the inner guide surface defined by the inner central part 19 of the flywheel.
- the system is so configured that, at acceptable operating speeds, gravity is sufficient to maintain the roller in contact with inner central part 19.
- the roller moves outwards under centrifugal action to engage outer guide surface 20.
- outer guide surface 20 is adapted to lock the position of roller 17 and, to that end, preferably includes at least one, and more preferably two, braking notches 21. It will be appreciated that, when the roller 17 enters one of the notches 21 further rolling action over the outer guide surface is prevented and the position of the roller is effectively locked with respect to the guide. In this event, the rotation of the flywheel 14 is transferred to the braking member 15 through link arm 16.
- the braking member 15 has a central in-operative position in which the member 15 is substantially symmetrical about a vertical line 22 passing through the pivot axis on which the braking member is mounted.
- the braking member includes cam surfaces 23 arranged to engage the rail surface as the braking member is pivoted about its mounting axis.
- the cam surfaces may be provided with teeth 24 or the like to enhance frictional engagement with the rail as the braking member is pivoted into engagement with the rail 6.
- catch means is preferably provided to maintain the braking member in the central position as shown in Figures 1 and 2, when not under the influence of the flywheel 14.
- the catch means is such that the same is overridden by flywheel effect when the roller 17 engages in one of locking notches 21.
- the catch means comprises a simple leaf spring 26 mounted on bracket 7 and having a central indent (not shown) to receive one end of locking pin 27 extending from the rear face of braking member 15.
- the pin 27 is forced out of the indent in the leaf spring 26.
- electrical switch 30 is provided, the switch 30 being mounted so as to be activated by upper lobes 31 on the braking member 15, when the barking member 15 is pivoted into an operative position, to cut power to the carriage drive motor (not shown).
- the present invention at least in relation to the working embodiment described herein, provides a relatively simple form of over-speed governor for a stairlift capable of effective operation regardless of the orientation of the stairlift installation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- Structural Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Types And Forms Of Lifts (AREA)
- Emergency Lowering Means (AREA)
- Regulating Braking Force (AREA)
- Catalysts (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
In a second aspect the invention provides a stairlift carriage including the governor set forth above.
- Figure 1:
- Shows an elevational view of a governor according to the invention;
- Figure 2:
- Shows a similar view to that shown in Figure 1 but with certain detail omitted ;
- Figure 3:
- Shows a sectional view through the governor shown in Figure 1; and
- Figure 4:
- Shows a view along the line IV-IV in Figure 3.
Claims (10)
- A governor (5) for governing the speed of a stairlift carriage along a stairlift rail (6), said carriage being movable along a stairlift rail (6) in two directions, said governor (5) including:a braking member (15) displaceable into contact with said stairlift rail (6); andoperating means operable, when the speed of said carriage along said rail exceeds a predetermined maximum, to cause said braking member (15) to engage said rail,said governor (5) being characterised in that said operating means comprises a first guide surface (19), rotatable with the movement of said carriage along said rail (6), and a roller (17), operatively connected to said braking member (15), in sliding contact with said first guide surface (19) when the speed of said carriage is less than said predetermined maximum, wherein said operating means is operable in the event of excessive speed in both of said two directions.
- A governor (5) as claimed in claim 1 wherein said operating means is constructed and arranged to induce said roller (17) to leave said first guide surface (19) under the influence of a force induced centrifugally.
- A governor (5) as claimed in any one of the preceding claims wherein said roller (17) is mounted for rotation on a first end of an operating lever (16), the other end of said operating lever (16) being pivotally mounted to said braking member (15).
- A governor (5) as claimed in any one of the preceding claims wherein said braking member (15) is mounted for rotation about the same axis as said first guide surface (19), said braking member (15) having cam surfaces (23) which are non-concentric with respect to said axis of rotation.
- A governor (5) as claimed in any one of the preceding claims wherein said first guide surface (19) comprises an inner guide surface, said operating means further including an outer guide surface (20), said roller (17) contacting said inner guide surface (19) when the speed of said carriage is below said predetermined maximum, and contacting said outer guide surface (20) when said speed exceeds said predetermined maximum, said outer guide surface (20) being constructed and arranged to allow the position of said roller (17) to be locked with respect to said first guide surface (19).
- A governor (5) as claimed in claim 5 wherein said outer guide surface (20) includes at least one locking notch (21) sized to receive said roller (17).
- A governor (5) as claimed in any one of the preceding claims wherein said braking member (15) has a central, inoperative position in which said braking member (15) is symmetrical about an axis passing through the axis of rotation thereof.
- A governor (5) as claimed in claim 7 further including a catch (27,28) to retain said braking member (15), against rotation, in said central position when not under the influence, of said operating means.
- A governor (5) as claimed in claim 5 or claim 6, wherein said operating means further includes a flywheel (14), said first guide surface (19) and said outer guide surface (20) being formed in said flywheel (14).
- A stairlift carriage including the governor (5) as claimed in any one of the preceding claims.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9901937 | 1999-01-28 | ||
GBGB9901937.4A GB9901937D0 (en) | 1999-01-28 | 1999-01-28 | Improvements in or relating to stsairlifts |
PCT/GB2000/000100 WO2000044663A1 (en) | 1999-01-28 | 2000-01-17 | Safety brake for stairlifts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1149041A1 EP1149041A1 (en) | 2001-10-31 |
EP1149041B1 true EP1149041B1 (en) | 2004-05-12 |
Family
ID=10846691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00900295A Expired - Lifetime EP1149041B1 (en) | 1999-01-28 | 2000-01-17 | Safety brake for stairlifts |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1149041B1 (en) |
JP (1) | JP2002535220A (en) |
AT (1) | ATE266598T1 (en) |
DE (1) | DE60010658T2 (en) |
GB (1) | GB9901937D0 (en) |
WO (1) | WO2000044663A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106458509A (en) * | 2014-06-16 | 2017-02-22 | 斯坦纳座椅电梯有限公司 | Improvements in or relating to stairlifts |
IT202100003905A1 (en) | 2021-02-19 | 2021-05-19 | Mpn S R L | Emergency brake |
EP3697716B1 (en) * | 2017-10-17 | 2022-01-12 | Extrema S.r.l. | A braking unit for a stairlift |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0909994D0 (en) * | 2009-06-10 | 2009-07-22 | Stannah Stairlifts Ltd | Improvements in or relating to stairlifts |
AT508496B1 (en) | 2009-07-02 | 2012-04-15 | Priglinger Josef Dr | FENDER FOR A STAIRLIFT |
NL2010013C2 (en) * | 2012-12-19 | 2014-06-23 | Thyssenkrupp Accessibility B V | Stair lift drive. |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE805782C (en) * | 1949-05-27 | 1951-05-31 | Gustav Hahn Dipl Ing | Brake safety device for elevators |
CH481007A (en) * | 1969-03-17 | 1969-11-15 | Gebauer & Cie | Speed limiter for elevators |
US4046226A (en) * | 1976-07-08 | 1977-09-06 | Flinchbaugh-Murray Corporation | Elevator system for transporting wheelchair patients |
NL180575C (en) * | 1980-03-12 | 1987-03-16 | Reus B V De | SECURITY MECHANISM FOR AN ELEVATOR OR SIMILAR TRANSPORTATION DEVICE. |
US4856623A (en) * | 1982-12-06 | 1989-08-15 | Romig Jr Byron A | Overspeed brake |
GB2264283B (en) * | 1992-02-21 | 1995-02-15 | Sunrise Medical Ltd | Overspeed governor of a stairlift and method of operating the stairlift |
-
1999
- 1999-01-28 GB GBGB9901937.4A patent/GB9901937D0/en not_active Ceased
-
2000
- 2000-01-17 WO PCT/GB2000/000100 patent/WO2000044663A1/en active IP Right Grant
- 2000-01-17 DE DE60010658T patent/DE60010658T2/en not_active Expired - Fee Related
- 2000-01-17 EP EP00900295A patent/EP1149041B1/en not_active Expired - Lifetime
- 2000-01-17 AT AT00900295T patent/ATE266598T1/en not_active IP Right Cessation
- 2000-01-17 JP JP2000595926A patent/JP2002535220A/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106458509A (en) * | 2014-06-16 | 2017-02-22 | 斯坦纳座椅电梯有限公司 | Improvements in or relating to stairlifts |
CN106458509B (en) * | 2014-06-16 | 2019-05-10 | 斯坦纳座椅电梯有限公司 | In stair lift or improvement relevant to stair lift |
EP3697716B1 (en) * | 2017-10-17 | 2022-01-12 | Extrema S.r.l. | A braking unit for a stairlift |
IT202100003905A1 (en) | 2021-02-19 | 2021-05-19 | Mpn S R L | Emergency brake |
WO2022175992A1 (en) | 2021-02-19 | 2022-08-25 | Mpn S.R.L. | Emergency brake |
Also Published As
Publication number | Publication date |
---|---|
DE60010658T2 (en) | 2005-05-25 |
ATE266598T1 (en) | 2004-05-15 |
EP1149041A1 (en) | 2001-10-31 |
WO2000044663A1 (en) | 2000-08-03 |
DE60010658D1 (en) | 2004-06-17 |
JP2002535220A (en) | 2002-10-22 |
GB9901937D0 (en) | 1999-03-17 |
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