SE542493C2 - A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift system - Google Patents
A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift systemInfo
- Publication number
- SE542493C2 SE542493C2 SE1851064A SE1851064A SE542493C2 SE 542493 C2 SE542493 C2 SE 542493C2 SE 1851064 A SE1851064 A SE 1851064A SE 1851064 A SE1851064 A SE 1851064A SE 542493 C2 SE542493 C2 SE 542493C2
- Authority
- SE
- Sweden
- Prior art keywords
- safety device
- brake
- regulator
- shaft
- switch
- Prior art date
Links
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
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/02—Cages, i.e. cars
- B66B11/026—Attenuation system for shocks, vibrations, imbalance, e.g. passengers on the same side
- B66B11/0293—Suspension locking or inhibiting means to avoid movement when car is stopped at a floor
-
- 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
- B66B5/048—Testing of overspeed governor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/024—Braking members; Mounting thereof the braking surface being inclined with respect to the rotor's axis of rotation at an angle other than 90 degrees, e.g. comprising a conical rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2129/00—Type of operation source for auxiliary mechanisms
- F16D2129/04—Mechanical
- F16D2129/043—Weights
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Braking Arrangements (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Emergency Lowering Means (AREA)
Abstract
The present invention relates to a mechanism (20) for a safety device for lift car for preventing unintended car movement of the lift car. The mechanism comprise a brake (21) and at least one trigger element (30A,30B) which is coupled to the brake, wherein the at least one trigger element being capable of rotating around a regulator shaft of the safety device, wherein the at least one trigger element being brought into a trigger state by the brake (21) when the mechanism is activated, and in the trigger state, the at least one trigger element (30A,30B is prevented from rotating by the brake (21), wherein the at least one trigger element (30A,30B) is connected to a first drive gear (24) wherein the brake (21) comprises a rotatable brake shaft (23) provided with a second drive gear (26) which is engaged with the first drive gear (24), and the brake comprises a brake arrangement (25) adapted to be engaged with the brake shaft when the mechanism is in an active state for braking the rotation of the brake shaft, the first and second drive gear and the at least one trigger element.The present invention also relates to safety device for a lift car and a safety arrangement for a lift system for preventing unintended car movement of the lift car.
Description
9 configured to pivot, rotate on the respective journal 7A,7B , the centre of rotation for each centrifugalbody.
Each centrifugal body 3A,3B constitutes a bow-shaped rockable arm with a first end 3A.1 ,3B.1 mountedon the respective journal on the first yoke connected to the regulator shaft, and having a second end3A.2,3B.2, oppositely directed, as seen in the direction of rotation.
The bow-shaped rockable arm has an inner side surface facing the regulator shaft and an arc-shapedouter side facing the inner surface of the rotatable first brake member. A connecting portion connectsthe inner and outer side surface. The connecting portion comprises an engagement surface intended toengage with the projections 6B and cam surface 3A.3 ,3B.3 intended to cooperate with a trigger elementof a mechanism, further described below.
With reference to FIG. 6B illustrating a trigger state, it is shown that in response to rotation of theregulator shaft 4, said centrifugal bodies are rotated outwards to engage with abutment surfaces of theprojections 6B thereby initating a braking action of the safety device.
As illustrated in Fig 2, the centrifugal regulator further comprises a spring 18 which is used to hold thecentrifugal bodies 3A,3B in an inner position, as seen in the radial direction. The centrifugal regulatorcomprises an L-shaped bracket 17 connected to the first yoke 9. The bracket has a first side, directedalong the first yoke 9, and a second side perpendicular and directed away from the hub.
The spring 18 is attached between the bracket and the first end 3A.-1 iof one centrifugal body 3A äto keep the centrifugal bodies in an inner position, as seen in the radial direction. The spring 18 isselected and adapted to apply a predetermined spring force to the centrifugal body. The spring force isbased on the preset speed limit for release of the safety device. ln response to an increasing speed of rotation of the centrifugal regulator together with the regulatorshaft 4, each centrifugal body 3A,3B is forced to rotate around the respectivejournal and move outwardstowards the inside surface of the first brake member 6.
At a predetermined rate of revolution of the regulator shaft, corresponding to the preset speed limit,the centrifugal force exerted on the centrifugal body exceeds the preset spring force of the spring, suchthat second end 3A.2, 3B.2 of the centrifugal bodies pivot around the respective journal 7A,7B to engagewith projections 6B on the inside of the rotatable first brake member 6.
As illustrated in Fig. 1 to 7 a mechanism for a safety device and a safety device according to the inventionis show which reduces the speed limit for releasing the safety device to 0 m/s when the mechanism isactivated.
The mechanism, generally referenced 20, comprises an additional brake 21 having a brake housing 22enclosing a brake arrangement 25 and a rotatable brake shaft 23 .The brake housing has end portionsin which a respective end of the brake shaft 23 is rotatable mounted.
Fig. 1 shows that the mechanism comprises two trigger elements 30,30B, which are arranged in thecentrifugal regulator 3. The first and second trigger elements 30A,30B are arranged to extend into thecentrifugal regulator 3, in order to enable interaction with the first and second centrifugal bodies.
Claims (23)
1. 16 A mechanism (20) for a safety device for lift car having a regulator shaft and a centrifugalregulator, wherein the mechanism (20) is connected to the safety device and comprises a brake (21) and at least one trigger element (30A,30B) which is coupled to the brake, wherein the at least one trigger element being capable of rotating around a regulator shaft ofthe safety device, wherein the at least one trigger element being brought into a trigger state by the brake (21)when the mechanism is activated, and in the trigger state, the at least one trigger element (30A,30B) is prevented from rotating bythe brake (21), wherein the at least one trigger element (30A,30B) is connected to a first drive gear (24)wherein the brake (21) comprises a rotatable brake shaft (23) provided with a second drive gear(26) which is engaged with the first drive gear (24), and the brake comprises a brakearrangement (25) adapted to be engaged with the brake shaft when the mechanism is in anactive state for braking the rotation of the brake shaft, the first and second drive gear and theat least one trigger element. The mechanism according to claim 1 characterized in that the at least one trigger element(30A,30B) is mounted on a first yoke (27) connected to the first drive gear (24), and that the atleast one trigger element comprises a first end which is mounted to the yoke and a second endused for actuating a centrifugal regulator of the safety device. The mechanism according to claim 2 comprising at least two trigger elements (30A,30B)mounted on the first yoke (27) having two ends, and that the trigger elements are mounteddiametrically opposite each other, where the trigger elements are mounted in each end of theyoke respectively. The mechanism according to any of the previous claims characterized in that the at least onetrigger element (30A,30B) comprises an axel bar or a pin. The mechanism according to any of the previous claims characterized in that the diameter of thefirst drive gear (24) is substantially larger than the diameter of the second drive gear (26). The mechanism according to any of the previous claims characterized in that the brake (21)comprises an electrically controlled brake, and a brake switch (103) which is remote controlled,and that the mechanism (20) is activated by disconnection of power supply to the brake switch. A Safety device (1) for protecting against unintended car movement of a lift car comprising theregulator shaft (4) which is brought to rotate due to a coupling (5) to the motion of the lift car,a safety brake (6,8), a centrifugal regulator (3) connected to the regulator shaft, said centrifugalregulator being adapted to couple the regulator shaft to the safety brake by engaging at leastone centrifugal body (3A,3B) of the centrifugal regulator with the safety brake to release thesafety device when the lift car motion exceeds a preset speed limit, 10. 11. 1
2. 1
3. 17 and a mechanism (20) comprising an additional brake (21) and at least one trigger element(30A,30B) which is coupled to the additional brake, wherein the at least one trigger element (30A,30B) is configured as a pin which has a longitudinalaxis which is parallel to the regulator shaft (4), and that the at least one trigger element isarranged to extend into the centrifugal regulator (3) to enable interaction with the at least onecentrifugal body (3A,3B), wherein the at least one trigger element (30A,30B) being capable ofrotating around a regulator shaft (4) of the safety device, wherein the at least one trigger element (30A,30B) being brought to rotate around the regulatorshaft (4) by the centrifugal regulator in a rotating state, wherein the at least one trigger element (30A,30B) being brought into a trigger state by theadditional brake when the mechanism (20)is activated, wherein, in the trigger state, the at least one trigger element (30A,30B) being prevented fromrotating by the additional brake and the at least one trigger element being arranged to triggerthe centrifugal regulator (3) to release the safety device. The safety device according to claim 7 characterized in that the at least one trigger element(30A,30B) being arranged to actuate the centrifugal body (3A,3B) to engage with the safety brake(6,8) to release the safety device. The safety device according to claim 7 or 8 characterized in that, the mechanism (20) comprises a first drive gear (24) which is supported by the regulator shaftand is mounted to rotate independent of the regulator shaft, and that the at least one trigger element (30A,30B) is connected to the first drive gear. The safety device according to any of claims 9 characterized in that, the mechanism (20) comprises a second drive gear (26) which is adapted to engage with the firstdrive gear (24), a rotatable brake shaft (23) connected to the second drive gear (26) , and a brake arrangement (25) adapted to be engaged with the brake shaft (23) when themechanism is in an active state in order to brake the rotation of the first drive gear and therotation of the at least one trigger element. The safety device according to any of claims 10 characterized in that, the at least one trigger element (30A,30B) and the first and second drive gears (24,26) and thebrake shaft (23) are adapted to be rotated by the centrifugal regulator when the mechanism isin an inactive state. The safety device according to any of claims 7-11 characterized in that the additional brake (21)comprises an electrically controlled brake, and that the mechanism (20) is activated bydisconnection of power supply to the additional brake. The safety device according to any of claims 9-12 characterized in that the centrifugal regulator(3) comprises a first and a second centrifugal body (3A,3B) which are connected by means ofjournals to a first yoke (9) attached to the regulator shaft (4) , said first and a second centrifugalbody being configured to rotate on respective journals (7A,7B), 1
4. 1
5. 1
6. 1
7. 1
8. 1
9. 20. 21. 18 and that the mechanism (20) comprises a first and a second trigger element (30A,30B) which aremounted diametrically opposite each other on a respective end of a second yoke (27) connectedto the first drive gear (24), said second yoke (27) being mounted to be rotated around theregulator shaft (4). The safety device according to any of c|aims Q-13 characterized in that the diameter of the firstdrive gear (24) is substantially larger than the diameter of the second drive gear (26). The safety device according to any of c|aims 7-14 characterized in that the mechanism (20) isadapted in order to be remotely activated by a control system. The safety device according to any of c|aims 7-15 characterized in that the centrifugal regulator(3) comprises a hub (14) which is connected to the regulator shaft to rotate together with theregulator shaft (4), and that the hub is fixedly connected to the regulator shaft by a wedge andgroove connection (50) in order to lock the hub (14) to the regulator shaft. The safety device according to any of c|aims 7-15 characterized in that the centrifugal regulatorcomprises a hub (14) which is connected to the regulator shaft to rotate together with theregulator shaft, and that the regulator shaft is provided with helical running splines (13), andthat a hub of the centrifugal regulator is provided with threads (14A) in order to enable an axialtranslation of the centrifugal regulator along the regulator shaft. The safety device according to any of c|aims 7-17 characterized in that the first and secondtrigger elements (30A,30B) are arranged to extend into the centrifugal regulator (3), in order toenable interaction with the first and second centrifugal bodies. The safety device according to any of c|aims Q-lß characterized in that the centrifugal regulator(3) is adapted to accommodate the first and second trigger elements (30A,30B) in a first andsecond space (15A,15B) limited by the first end (3A.1 ,3B.1)of one of the centrifugal bodies(3A,3B) and a cam surface (3A.3 ,3B.3) of the other centrifugal body and a curved guide surface(16A,16B) on the hub (14), and that the first and second trigger elements are arranged to beguided by the curved guide surface (16A,16B) to rotate around the regulator shaft (4) in therotating state. The safety device according to any of c|aims 7-19 characterized in that the first and secondcentrifugal body (3A,3B) are provided with one respective cam surface (3A.3 ,3B.3) which isadapted to form a nip (19) with one respective curved guide surface (16A,16B), and that the thefirst and second trigger elements (30A,30B), when in the trigger state, interact with the respective cam surface (3A.3 ,3B.3) in said respective nip (19) to force the first and secondcentrifugal bodies to rotate outwards to engage with the safety brake (6,8). A safety arrangement (100,200) for a lift system comprising at least one safety device (1) according to any of the c|aims 7-20, a power supply (107,207) adapted to supply power to the safety arrangement,at least one door switch (104,204) associated with a landing for the lift car, 22. 23. 19 wherein the at least one safety device is further provided with a brake switch (103,203a,203b)connected to the additional brake of the mechanism (20) associated with the at least one safetydevice, the at least one brake switch (103,203a,203b) being adapted to be electrically coupled to the atleast one door switch (104,204), and the at least one door switch (104,204)being adapted to be opened when the lift car standsby a landing, wherein the at least one door switch (104,204) being adapted to disconnect the brake switch(103,203a,203b) from the power supply (107,207) when the at least one door switch (104,204)is opened whereby the safety device is triggered to be released. The safety arrangement for a lift system according to claim 21 comprising that the at least one safety device is further provided with a safety device switch(105,205a,205b) which is adapted to be opened in response to a releasing action of the safetydevice, wherein the at least one safety device switch (105,205a,205b) is electrically coupled tothe at least one brake switch (103,203a,203b) , and the at least one safety device switch (105,205a,205b) is adapted to the at least on brakeswitch from the power supply when the at least one safety device switch is opened. A safety arrangement for a lift system according to claim 21 comprising at least a first safety device and a second safety device, that the first safety device being provided with a first safety device switch (205a) and a first brakeswitch (203a) which are electrically coupled to each other, that the second safety device being provided with a second safety device switch (205b) and asecond brake switch (203b) which are electrically coupled to each other, that the first safety device switch (205a) is adapted to be opened in response to a releasingaction of the first safety device, that the second safety device switch (205b) is adapted to be opened in response to a releasingaction of the second safety device, that the first safety device switch (205a) and the second safety device switch (205b) areelectrically coupled in series , wherein the power supply to the first brake switch (203a) and to the second brake switch (203b)is disconnected when the first safety device switch (205a) or the second safety device switch(205b) are opened.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1851064A SE542493C2 (en) | 2018-09-07 | 2018-09-07 | A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift system |
| EP19857563.1A EP3847119A4 (en) | 2018-09-07 | 2019-09-05 | A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift system |
| PCT/SE2019/050833 WO2020050768A1 (en) | 2018-09-07 | 2019-09-05 | A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1851064A SE542493C2 (en) | 2018-09-07 | 2018-09-07 | A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1851064A1 SE1851064A1 (en) | 2020-03-08 |
| SE542493C2 true SE542493C2 (en) | 2020-05-26 |
Family
ID=69721707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1851064A SE542493C2 (en) | 2018-09-07 | 2018-09-07 | A mechanism for a safety device for a lift car, a safety device for protecting against unintended car movement of a lift car and a safety arrangement for a lift system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3847119A4 (en) |
| SE (1) | SE542493C2 (en) |
| WO (1) | WO2020050768A1 (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415343A (en) * | 1967-04-18 | 1968-12-10 | Alimak Verken Ab | Catch apparatus for the cages of scaffold elevators and the like |
| DE2753079A1 (en) * | 1977-11-29 | 1979-05-31 | Elba Werk Maschinen Gmbh & Co | CATCHING DEVICE FOR ELEVATORS, IN PARTICULAR SUCH WITH RACK DRIVE |
| FI95021C (en) * | 1993-06-08 | 1995-12-11 | Kone Oy | Method and apparatus for triggering an elevator gripping device |
| FI120303B (en) * | 2005-06-23 | 2009-09-15 | Kone Corp | Method and apparatus for triggering a captive device in an elevator |
| WO2007122282A1 (en) * | 2006-04-20 | 2007-11-01 | Kone Corporation | Elevator |
| JP5157648B2 (en) * | 2008-05-30 | 2013-03-06 | フジテック株式会社 | Elevator governor |
| JP5287859B2 (en) * | 2008-08-28 | 2013-09-11 | 三菱電機株式会社 | Elevator governor |
| KR101199745B1 (en) | 2009-01-20 | 2012-11-08 | 미쓰비시덴키 가부시키가이샤 | Safety device for elevator |
| CN104159840A (en) * | 2012-03-06 | 2014-11-19 | 三菱电机株式会社 | Elevator governor and elevator device |
| DE102012016336A1 (en) * | 2012-08-20 | 2014-02-20 | Bode Components Gmbh | Speed limiter for safety gear of elevator car for elevator system, has limiter wheel, in which rope of elevator system is performed, where locking unit is connected with limiter wheel |
-
2018
- 2018-09-07 SE SE1851064A patent/SE542493C2/en unknown
-
2019
- 2019-09-05 WO PCT/SE2019/050833 patent/WO2020050768A1/en active Search and Examination
- 2019-09-05 EP EP19857563.1A patent/EP3847119A4/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020050768A1 (en) | 2020-03-12 |
| SE1851064A1 (en) | 2020-03-08 |
| WO2020050768A9 (en) | 2020-11-12 |
| EP3847119A1 (en) | 2021-07-14 |
| EP3847119A4 (en) | 2022-09-07 |
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