WO2006082460A1 - A fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and elevator counterweight equipped therewith - Google Patents
A fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and elevator counterweight equipped therewith Download PDFInfo
- Publication number
- WO2006082460A1 WO2006082460A1 PCT/IB2005/000273 IB2005000273W WO2006082460A1 WO 2006082460 A1 WO2006082460 A1 WO 2006082460A1 IB 2005000273 W IB2005000273 W IB 2005000273W WO 2006082460 A1 WO2006082460 A1 WO 2006082460A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- counterweight
- suspension
- sheave block
- axis
- pulley axis
- 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
- B66B5/16—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
- B66B5/20—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 by means of rotatable eccentrically-mounted members
-
- 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
Definitions
- This invention relates to a fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and to an elevator counterweight equipped therewith.
- Some elevator counterweights specially in elevators installed in buildings with underground car parks, are provided with a safety device preventing them to accidentally fall within the building structure.
- This safety device is a speed limiter with an upper control pulley and a lower tensioning pulley mounted laterally in the elevator shaft, with a cable wrapped over said pulleys and attached to the counterweight.
- Such a speed limiting system requires a considerable side space in the elevator shaft, which is hardly compatible with modern elevators with small shafts, and requires a long mounting time.
- This invention aims at correcting these disadvantages and proposes a safety device for elevator counterweight comprising a framework with an upper crossbeam and a parachute device on its rail guides, wherein the upper crossbeam contains a suspension sheave block connected to the counterweight hanging cables or belts, wherein the device is characterized in that it uses a mechanism connected to the counterweight parachute device and to the counterweight suspension sheave block and integrated into the upper crossbeam of the counterweight frame, said mechanism being controlled to actuate said counterweight parachute device according to the axis pressure or suspension force of the axes of said pulleys in order to arrest the counterweight below a set pressure or suspension force threshold corresponding to a slackening or rupture of the counterweight suspension cables or belts.
- the safety device operates according to the suspension force of the pulley axis in the counterweight suspension sheave block, wherein said pulley axis is mounted to move in vertical translation over a short distance on the sheave block and to be returned downwards by spring means countering the suspension force, between an upper position in normal service and a lower incident position, said mechanism being also connected to said pulley axis so that the downward travel of the pulley axis under its own weight and under the action of the spring means at an abnormal suspension force controls the mechanism to actuate the counterweight parachute device and arrest the counterweight.
- the spring means are set so that the sum of the downward spring thrust and the pulley axis weight is lower than the upward suspension force of the suspension elements exerted on the counterweight pulley axis, and is noticeably higher than the latter in case of slackening or rupture of the suspension elements, so as to control a fast displacement of the pulley axis and therefore of the counterweight parachute device in case of a malfunction of the suspension elements (belts or cables).
- Said pulley axis can be mounted integral with a trolley element mounted to slide vertically on the sheave block between said upper normal service position and said lower incident position.
- the pulley axis can be mounted to slide directly on the sheave block with its ends in two corresponding opposite elongated openings in the sheave block.
- Said mechanism is a simple rod linkage type motion return mechanism arranged inside the upper counterweight cross-beam and converting the vertical displacement of the pulley axis or of the trolley into a control motion to actuate the counterweight parachute device.
- the invention also relates to a counterweight provided with a safety device as described above.
- Figure 1 is a perspective view of a fall prevention device for counterweights as per the invention embodiment mounted inside the upper cross-beam of a counterweight frame, in the normal service position;
- Figure 2 is a partial enlarged view of Figure 1 , in which the pulley axis of the suspension sheave block is displaced into the lower incident position;
- Figure 3 shows the assembly of the pulley axis inside the sheave block
- Figure 4 is a side view of the sheave block with the pulley axis in the normal operating position
- Figure 5 is a view similar to Figure 4 with the pulley axis in the lower incident position.
- the fall prevention device for counterweights as per the invention is fitted on an elevator counterweight 1 with parachute devices 3 on its lateral posts 5 cooperating with its guide rails 7.
- the device as represented by Figures 1 and 2 in particular is assembled inside the upper crossbeam 9 of the counterweight frame. It involves the counterweight suspension sheave block 1 1 , which is attached in the middle of the upper counterweight crossbeam 9 (or slightly offset) and accommodates the counterweight hanging belts 13 by its pulleys.
- This device includes two main elements comprising a device for the vertically sliding assembly of the axis 15 of the sheave block 1 1 pulleys and a motion-transmitting device 17 to transmit the sliding displacement of the axis 15 to the parachute device 3.
- the sliding mounting device is such that the axis 15 of the pulleys is mounted to slide ( Figure 3) in the sheave block 11 with its ends 19 accommodated in two opposing elongated holes 21 in side plates 22 of the sheave block body.
- the assembly is symmetrical relative to the middle plane of the sheave block.
- Each end of the axis 15 accommodates a protection ring 23 resting on the elongated hole 21.
- the axis 15 is mounted on two intermediate side parts 25 with which it is held integral at each end.
- These lateral parts 25 are rectangular plastic blocks mounted to slide vertically on the sheave block, each at a small distance from said side plates 22.
- These blocks 25 slide each on two vertical metal rods 27 attached to the upper flat 29 of the sheave block and passing through two corresponding bored holes in the block 25 with a small clearance.
- These rods 27 each accommodate in their upper part a helical spring 31 applied in tension against said upper flat 29 and against the base of the plastic block 25, thus pushing the block 25 back downwards until the axis abuts on the lower end of the elongated openings 21.
- the axis 15 is held locked in rotation and translation at each end by a key part 33 attached laterally outside of the block 25 and engaging an end groove of the axis beyond the protection ring 23 accommodated in the opening 21.
- This key part 33 has an outer protruding element, e.g. simply a screw 35 ( Figure 4), attached at its lower part and offset vertically relative to the axis 15.
- This protruding element 35 rests against the end of a lever 37 of a cross-bar 39, which is mounted at the lower part of the upper crossbeam 9 of the counterweight frame, between the sheave block 1 1 and the guide rail 7, on either side of the sheave block.
- This bar 39 controls the actuation of the parachute device 3 when its lever 37 is turned downwards ( Figure 5).
- it is mounted so that its lever 37 is returned upwards against said protruding element 35 of the key part, e.g. by a spring element 41 mounted appropriately on the parachute device.
- the assembly is designed with a symmetry plane in the middle of the counterweight.
- the two side bars 39 controlling the parachute devices on the guide rails 7 may be replaced by one bar arranged transversally between the parachute devices (not represented) and actuated by either one of the sliding blocks 25 of the sheave block.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention pertains to a fall prevention device for an elevator counterweight (1) comprising a framework with an upper crossbeam (9) and a parachute device (3) on its rail guides (7), wherein the upper crossbeam (9) contains a suspension sheave block (11) connected to the counterweight hanging cables or belts (13), characterized in that it uses a mechanism connected to the counterweight parachute device (3) and to the counterweight suspension sheave block (11) and integrated into the upper crossbeam (9) of the counterweight frame, said mechanism being controlled to actuate said counterweight parachute device (3) according to the pressure or suspension force of the axes of said pulleys in order to arrest the counterweight (1) below a set axis (15) pressure or suspension force threshold corresponding to a slackening or rupture of the counterweight suspension cables or belts.
Description
A FALL PREVENTION DEVICE AIMED AT PREVENTING AN ELEVATOR COUNTERWEIGHT TO FALL IF ITS SUSPENSION ELEMENTS BREAK AND ELEVATOR COUNTERWEIGHT EQUIPPED THEREWITH
This invention relates to a fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and to an elevator counterweight equipped therewith.
Some elevator counterweights, specially in elevators installed in buildings with underground car parks, are provided with a safety device preventing them to accidentally fall within the building structure. This safety device is a speed limiter with an upper control pulley and a lower tensioning pulley mounted laterally in the elevator shaft, with a cable wrapped over said pulleys and attached to the counterweight. Such a speed limiting system requires a considerable side space in the elevator shaft, which is hardly compatible with modern elevators with small shafts, and requires a long mounting time.
This invention aims at correcting these disadvantages and proposes a safety device for elevator counterweight comprising a framework with an upper crossbeam and a parachute device on its rail guides, wherein the upper crossbeam contains a suspension sheave block connected to the counterweight hanging cables or belts, wherein the device is characterized in that it uses a mechanism connected to the counterweight parachute device and to the counterweight suspension sheave block and integrated into the upper crossbeam of the counterweight frame, said mechanism being controlled to actuate said counterweight parachute device according to the axis pressure or suspension force of the axes of said pulleys in order to arrest the counterweight below a set pressure or suspension force threshold corresponding to a slackening or rupture of the counterweight suspension cables or belts.
The safety device operates according to the suspension force of the pulley axis in the counterweight suspension sheave block, wherein said pulley axis is mounted to move in vertical translation over a short distance on the sheave block and to be returned downwards by spring means countering the suspension force, between an upper position in normal service and a lower incident position, said mechanism being also connected to said pulley axis so that the downward travel of the pulley axis under its own weight and under the action of the spring
means at an abnormal suspension force controls the mechanism to actuate the counterweight parachute device and arrest the counterweight.
Of course, the spring means are set so that the sum of the downward spring thrust and the pulley axis weight is lower than the upward suspension force of the suspension elements exerted on the counterweight pulley axis, and is noticeably higher than the latter in case of slackening or rupture of the suspension elements, so as to control a fast displacement of the pulley axis and therefore of the counterweight parachute device in case of a malfunction of the suspension elements (belts or cables).
Said pulley axis can be mounted integral with a trolley element mounted to slide vertically on the sheave block between said upper normal service position and said lower incident position. In addition, the pulley axis can be mounted to slide directly on the sheave block with its ends in two corresponding opposite elongated openings in the sheave block.
Said mechanism is a simple rod linkage type motion return mechanism arranged inside the upper counterweight cross-beam and converting the vertical displacement of the pulley axis or of the trolley into a control motion to actuate the counterweight parachute device.
The invention also relates to a counterweight provided with a safety device as described above.
The invention is illustrated hereafter with an exemplary embodiment, referring to the appended drawings, wherein:
Figure 1 is a perspective view of a fall prevention device for counterweights as per the invention embodiment mounted inside the upper cross-beam of a counterweight frame, in the normal service position; Figure 2 is a partial enlarged view of Figure 1 , in which the pulley axis of the suspension sheave block is displaced into the lower incident position;
Figure 3 shows the assembly of the pulley axis inside the sheave block; Figure 4 is a side view of the sheave block with the pulley axis in the normal operating position; and
Figure 5 is a view similar to Figure 4 with the pulley axis in the lower incident position.
The fall prevention device for counterweights as per the invention is fitted on an elevator counterweight 1 with parachute devices 3 on its lateral posts 5 cooperating with its guide rails 7.
The device as represented by Figures 1 and 2 in particular is assembled inside the upper crossbeam 9 of the counterweight frame. It involves the counterweight suspension sheave block 1 1 , which is attached in the middle of the upper counterweight crossbeam 9 (or slightly offset) and accommodates the counterweight hanging belts 13 by its pulleys. This device includes two main elements comprising a device for the vertically sliding assembly of the axis 15 of the sheave block 1 1 pulleys and a motion-transmitting device 17 to transmit the sliding displacement of the axis 15 to the parachute device 3.
The sliding mounting device is such that the axis 15 of the pulleys is mounted to slide (Figure 3) in the sheave block 11 with its ends 19 accommodated in two opposing elongated holes 21 in side plates 22 of the sheave block body. The assembly is symmetrical relative to the middle plane of the sheave block.
Each end of the axis 15 accommodates a protection ring 23 resting on the elongated hole 21.
The axis 15 is mounted on two intermediate side parts 25 with which it is held integral at each end. These lateral parts 25 are rectangular plastic blocks mounted to slide vertically on the sheave block, each at a small distance from said side plates 22. These blocks 25 slide each on two vertical metal rods 27 attached to the upper flat 29 of the sheave block and passing through two corresponding bored holes in the block 25 with a small clearance. These rods 27 each accommodate in their upper part a helical spring 31 applied in tension against said upper flat 29 and against the base of the plastic block 25, thus pushing the block 25 back downwards until the axis abuts on the lower end of the elongated openings 21.
The axis 15 is held locked in rotation and translation at each end by a key part 33 attached laterally outside of the block 25 and engaging an end groove of the axis beyond the protection ring 23 accommodated in the opening 21.
This key part 33 has an outer protruding element, e.g. simply a screw 35 (Figure 4), attached at its lower part and offset vertically relative to the axis 15. This protruding element 35 rests against the end
of a lever 37 of a cross-bar 39, which is mounted at the lower part of the upper crossbeam 9 of the counterweight frame, between the sheave block 1 1 and the guide rail 7, on either side of the sheave block. This bar 39 controls the actuation of the parachute device 3 when its lever 37 is turned downwards (Figure 5). In addition, it is mounted so that its lever 37 is returned upwards against said protruding element 35 of the key part, e.g. by a spring element 41 mounted appropriately on the parachute device.
Of course, the assembly is designed with a symmetry plane in the middle of the counterweight.
The operation of the device shall now be described. In normal operation, when the suspension elements 13 are in good condition, the pulley axis 15 abuts against the upper part of the elongated openings 21 , under the load of the counterweight that hangs normally from the suspension belts 13. This position corresponds to
Figure 1 , Figure 3 and Figure 4, wherein each of the plastic intermediate block 25 supporting the end of the axis is arranged in its upper position.
If the suspension belts 13 slackened accidentally, or even broke, the hanging force applied by these belts on the axis 15 of the pulleys would abruptly decrease. The compressed springs 31 of the two intermediate blocks 25 would then exert a tension force much higher than said hanging force (which is reduced or suppressed). They would then instantaneously expand to displace the intermediate blocks 25 downwards to make the axis abut on the lower end of the openings 21 , thus controlling the two parachute devices 3 on the counterweight guide rails 7. The counterweight would then be immediately arrested and prevented from falling.
As a variant of the invention, it should be noted that the two side bars 39 controlling the parachute devices on the guide rails 7 may be replaced by one bar arranged transversally between the parachute devices (not represented) and actuated by either one of the sliding blocks 25 of the sheave block.
Claims
1. Fall prevention device for an elevator counterweight (1) comprising a framework with an upper crossbeam (9) and a parachute device (3) on its rail guides (7), wherein the upper crossbeam (9) contains a suspension sheave block (11) connected to the counterweight hanging cables or belts (13), characterized in that it uses a mechanism connected to the counterweight parachute device (3) and to the counterweight suspension sheave block (1 1) and integrated into the upper crossbeam (9) of the counterweight frame, said mechanism being controlled to actuate said counterweight parachute device (3) according to the pressure or suspension force of the axes of said pulleys in order to arrest the counterweight (1) below a set axis (15) pressure or suspension force threshold corresponding to a slackening or rupture of the counterweight suspension cables or belts (13).
2. Fall prevention device for a counterweight as per claim 1, characterized in that it operates according to the suspension force of the pulley axis (15) in the counterweight suspension sheave block, wherein said pulley axis (15) is mounted to move in vertical translation over a short distance on the sheave block (1 1) and to be returned downwards by spring means (31) countering the suspension force, between an upper position in normal service and a lower incident position, said mechanism being also connected to said pulley axis (15) so that the downward travel of the pulley axis ( 15) under its own weight and under the action of said spring means (31) at an abnormal suspension force controls the mechanism to actuate the counterweight parachute device (3) and arrest the counterweight.
3. Fall prevention device for a counterweight as per any one of claims 1-2, characterized in that said spring means (31) are set so that the sum of the downward spring thrust and the pulley axis (15) weight is lower than the upward suspension force of the suspension elements (13) exerted on the counterweight pulley axis (15) and is noticeably higher than the latter in case of slackening or rupture of the suspension elements (13), so as to control a fast displacement of the pulley axis (15) and therefore of the counterweight parachute device (3) in case of a malfunction of the suspension elements (13).
4. Fall prevention device for a counterweight as per any one of the preceding claims, characterized in that said pulley axis (15) is mounted integral with a trolley element mounted to slide vertically on the sheave block ( 1 1) between said upper normal service position and said lower incident position.
5. Fall prevention device for a counterweight as per any one of claims 1 and 3, characterized in that the pulley axis ( 15) is mounted to slide vertically directly on the sheave block (1 1) with its ends (19) sliding in two corresponding opposite elongated openings (21) in the sheave block.
6. Fall prevention device for a counterweight as per any one of claims 4 and 5, characterized in that said mechanism is a simple rod linkage type motion return mechanism arranged inside the upper counterweight cross-beam (9) and converting the vertical displacement of the pulley axis (15) or of the trolley into a control motion to actuate the counterweight parachute device (3) .
7. Fall prevention device for a counterweight as per any one of claims 1 and 3, characterized in that the axis ( 15) of the pulleys is mounted to slide in the sheave block (1 1) with its ends (19) accommodated in two opposing elongated holes (21) in the side plates (22) of the sheave block body, the axis (15) being mounted in addition on two intermediate side parts
(25) with which it is held integral at each end (19) to slide vertically on the sheave block (1 1), and provided with a helical spring (31) pushing the block (25) back downwards until the axis ( 15) abuts on the lower end of the elongated openings (21), the axis (15) being held in addition locked at each of its ends by a key part (33) attached laterally on the block (25), and a protruding element (35) connected to the block (25) by the key part (33) and resting against the end of a lever (37) of a cross-bar (39) controlling the parachute device on one side of the sheave block ( 1 1), each of the two bars (39) being mounted into the upper crossbeam (9) between the sheave block ( 1 1) and the guide rail (7).
8. Fall prevention device for a counterweight as per claim 7, characterized in that that the two side bars (39) controlling the parachute devices (3) on the guide rails (7) are replaced by one bar arranged actuated by the sliding blocks (25).
9. Elevator counterweight ( 1) with at least one parachute device (3) cooperating with one of its rail guides (7), characterized in that it comprises a mounting device to make the pulley axis ( 15) of its upper sheave block (11) slide vertically between a service position and an incident position, and a device to transmit the sliding motion of the pulley axis (15) to the parachute device (3) outside of said service position in order to control and actuate the parachute device (3) and therefore to arrest the counterweight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2005/000273 WO2006082460A1 (en) | 2005-02-03 | 2005-02-03 | A fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and elevator counterweight equipped therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2005/000273 WO2006082460A1 (en) | 2005-02-03 | 2005-02-03 | A fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and elevator counterweight equipped therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006082460A1 true WO2006082460A1 (en) | 2006-08-10 |
Family
ID=34960209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2005/000273 WO2006082460A1 (en) | 2005-02-03 | 2005-02-03 | A fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and elevator counterweight equipped therewith |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2006082460A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072657A1 (en) * | 2008-12-26 | 2010-07-01 | Inventio Ag | Counterweight in an elevator installation |
| WO2010121944A1 (en) | 2009-04-20 | 2010-10-28 | Inventio Ag | Operating state monitoring of support means of an elevator system |
| EP2376361A1 (en) * | 2009-01-15 | 2011-10-19 | Kone Corporation | Elevator |
| CN106927331A (en) * | 2017-04-13 | 2017-07-07 | 台州市中奥特种设备检测技术服务有限公司 | A kind of speed limit anti-drop device for lift transformation |
| WO2018073134A1 (en) * | 2016-10-19 | 2018-04-26 | Aip Aps | Elevator systems |
| CN107986202A (en) * | 2017-12-28 | 2018-05-04 | 山东豪迈机械制造有限公司 | A kind of anti-fall device, anti-fall mechanism and lifting device |
| EP3670416A1 (en) * | 2018-12-20 | 2020-06-24 | Otis Elevator Company | Safety brake for a counterweight activated by a tension member |
| CN113086822A (en) * | 2019-12-23 | 2021-07-09 | 奥的斯电梯公司 | Test device and method for handover |
| EP3878792A1 (en) * | 2020-03-09 | 2021-09-15 | KONE Corporation | Counterweight frame, elevator and method |
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| JPS5453451A (en) * | 1977-10-06 | 1979-04-26 | Toshiba Corp | Emergency elevator cage stopping device |
| US5495919A (en) * | 1994-04-25 | 1996-03-05 | Otis Elevator Company | Safety brake apparatus for an elevator car or counterweight |
| FR2832139A1 (en) * | 2001-11-13 | 2003-05-16 | Otis Elevator Co | Parachute counterweight installation for lift comprises two safety units, fixed on counterweight lateral surfaces, activated by two parallel levers articulated on safety units and connected to horizontal rod |
-
2005
- 2005-02-03 WO PCT/IB2005/000273 patent/WO2006082460A1/en not_active Application Discontinuation
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5453451A (en) * | 1977-10-06 | 1979-04-26 | Toshiba Corp | Emergency elevator cage stopping device |
| US5495919A (en) * | 1994-04-25 | 1996-03-05 | Otis Elevator Company | Safety brake apparatus for an elevator car or counterweight |
| FR2832139A1 (en) * | 2001-11-13 | 2003-05-16 | Otis Elevator Co | Parachute counterweight installation for lift comprises two safety units, fixed on counterweight lateral surfaces, activated by two parallel levers articulated on safety units and connected to horizontal rod |
Non-Patent Citations (1)
| Title |
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| PATENT ABSTRACTS OF JAPAN vol. 003, no. 076 (M - 064) 29 June 1979 (1979-06-29) * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264626A (en) * | 2008-12-26 | 2011-11-30 | 因温特奥股份公司 | Counterweight in elevator installation |
| US8668054B2 (en) | 2008-12-26 | 2014-03-11 | Inventio Ag | Counterweight in an elevator installation |
| WO2010072657A1 (en) * | 2008-12-26 | 2010-07-01 | Inventio Ag | Counterweight in an elevator installation |
| EP2376361A1 (en) * | 2009-01-15 | 2011-10-19 | Kone Corporation | Elevator |
| EP2376361A4 (en) * | 2009-01-15 | 2014-11-05 | Kone Corp | Elevator |
| WO2010121944A1 (en) | 2009-04-20 | 2010-10-28 | Inventio Ag | Operating state monitoring of support means of an elevator system |
| CN102405182A (en) * | 2009-04-20 | 2012-04-04 | 因温特奥股份公司 | Operating state monitoring of support means of an elevator system |
| US8857571B2 (en) | 2009-04-20 | 2014-10-14 | Inventio Ag | Operating state monitoring of support apparatus of an elevator system |
| WO2018073134A1 (en) * | 2016-10-19 | 2018-04-26 | Aip Aps | Elevator systems |
| CN106927331B (en) * | 2017-04-13 | 2022-10-28 | 台州市特种设备检验检测研究院 | Speed-limiting anti-falling device for elevator transformation |
| CN106927331A (en) * | 2017-04-13 | 2017-07-07 | 台州市中奥特种设备检测技术服务有限公司 | A kind of speed limit anti-drop device for lift transformation |
| CN107986202A (en) * | 2017-12-28 | 2018-05-04 | 山东豪迈机械制造有限公司 | A kind of anti-fall device, anti-fall mechanism and lifting device |
| CN111348518A (en) * | 2018-12-20 | 2020-06-30 | 奥的斯电梯公司 | Elevator safety actuator system |
| CN111348518B (en) * | 2018-12-20 | 2021-07-23 | 奥的斯电梯公司 | Elevator safety actuator system |
| US11261056B2 (en) | 2018-12-20 | 2022-03-01 | Otis Elevator Company | Elevator safety actuator systems |
| EP3670416A1 (en) * | 2018-12-20 | 2020-06-24 | Otis Elevator Company | Safety brake for a counterweight activated by a tension member |
| CN113086822A (en) * | 2019-12-23 | 2021-07-09 | 奥的斯电梯公司 | Test device and method for handover |
| CN113086822B (en) * | 2019-12-23 | 2023-10-03 | 奥的斯电梯公司 | Device and method for testing double-hand over |
| US11866298B2 (en) * | 2019-12-23 | 2024-01-09 | Otis Elevator Company | Counterweight handover test device and method |
| EP3878792A1 (en) * | 2020-03-09 | 2021-09-15 | KONE Corporation | Counterweight frame, elevator and method |
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