CN110040600A - A kind of elevator manual emergency brake apparatus - Google Patents
A kind of elevator manual emergency brake apparatus Download PDFInfo
- Publication number
- CN110040600A CN110040600A CN201910319942.9A CN201910319942A CN110040600A CN 110040600 A CN110040600 A CN 110040600A CN 201910319942 A CN201910319942 A CN 201910319942A CN 110040600 A CN110040600 A CN 110040600A
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- CN
- China
- Prior art keywords
- lift car
- elevator
- servo motor
- control device
- speed
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- 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.)
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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
- B66B5/26—Positively-acting devices, e.g. latches, knives
-
- 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
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
-
- 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
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a kind of elevator manual emergency brake apparatus, solving the problems, such as that the urgent stop actuator of the prior art is too long causes elevator to be stopped occurring delaying by urgent card to increase elevator safety risk.The present invention includes a pair of guide rails, lift car, set on the control device of lift car inner top, it connect with control device for real-time monitoring lift car in elevator lifting speed on lift car, by the device for monitoring speed of the speed signal real-time transmission monitored to control device, executes the urgent stop executing agency that urgent stop acts after connect the urgent stop signal sent for receiving control device with control device on lift car.The urgent stop executing agency of the present invention includes servo motor and the safety tongs that connect with servo motor, centre does not have force transmission mechanism, stroke is extremely short, and quickly lift car card can be parked on guide rail after microprocessor issues urgent stop instruction, can effectively reduce elevator safety risk.
Description
Technical field
The present invention relates to a kind of elevator manual emergency brake apparatus.
Background technique
As the quantity of China's skyscraper is more and more, elevator has become indispensable tool manned in building,
The safety of operation is people's focus of attention during using elevator.Its safety run is that people are using elevator
Focus of attention in the process.But in recent years, elevator " eating people " event of " hurting sb.'s feelings " repeated, the safety problem of a time elevator
It receives great attention.
Being equipped with a variety of mechanically and electrically safety devices in the design and producing of elevator device thus can to prevent elevator
The peril that can occur, the prior art use centrifugal governor generally to limit elevator overspeed operation, still, the prior art
Generally there are following problems in the process of running:
(1), limiter of speed centrifugation whipping part is failure to actuate for a long time easily gets rusty, and can not much be operating normally, (especially new edition two
Number single inspection rule regulation of modification is just verified when 2 years maintenance units of elevator greater than 3m/s speed, and reviewer does not need
Field-checking process carries out field observation)；
(2), it since the variation of wirerope itself extends, causes tensioning apparatus to contact to earth, keeps steel wire rope tension inadequate, generation is beaten
It is sliding；
(3), limiter of speed rope-clamping pliers brake force is inadequate, can't clip limiter of speed steel cable.When limiter of speed operation time limit speed device steel cable
It skids in limiter of speed race and is unable to lift safety tongs, cause failure；
(4), the lifting throw of lever is inadequate, and apart from excessive, lifting is not in place, makes for active laver end and safety tongs linked switch
Voussoir does not reach trackwork face, and when torque arm lifts, switch cannot be moved at the same time；
(5), since the abrasion of speed limit device wheel race, the position of speed limiter wire rope decline, rope-clamping pliers do not reach steel cable
Or brake force is inadequate, and limiter of speed steel cable is caused to skid；
(6), speed limiter wire rope position makes rope-clamping clamp less than limiter of speed steel wire not within the scope of rope-clamping pliers effective width
Rope, causes to fail；
(7), high-rise high speed elevator speed limiter wire rope is long, and cost improves, and amplitude is big, be easy to cause malfunction.
In order at least solve above-mentioned subproblem, the applicant has developed a elevator emergency stop protection system early period,
And patent of invention is applied for, number of patent application 201821175762.5, patent name is a kind of " urgent stop of novel elevator
Protection system ", the patent of invention technology is simple with structure, design is scientific and reasonable, easy to use, so that safety tongs movement speed
The characteristics of precision is high, safer, and action test is easy to operate, saves time raising maintenance efficiency, reduces security risk,
Good effect is played in practical application.But some shortcomings are had also discovered in practical applications, mainly are as follows: mechanical action
The slightly aobvious complexity of apparatus structure, urgent stop actuator is too long, and urgent stop movement is stagnant after causing processor to issue instruction
Afterwards, that is, elevator is stopped will appear and delays by urgent card, increases elevator safety risk, meanwhile, urgent stop executing agency is many
Component is hinged using pin shaft and lift car, and urgent stop protection system is often in slack for a long time and makees state, when
Between it is one long, it may appear that the situation of pin shaft hinged place not working also will increase elevator safety risk.
Therefore, the present invention provides a kind of elevator manual emergency brake apparatus, is in number of patent application
201821175762.5, patent name is a kind of patent base of the inventive technique scheme of " urgent stop protection system of novel elevator "
It is improved on plinth, to solve above-mentioned partial technical problems, becomes skilled artisan's technology urgently to be resolved and ask
Topic.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of elevator manual emergency brake apparatus, existing skill is solved
The urgent stop actuator of art is too long to cause elevator to stop occurring delaying the problem of increasing elevator safety risk by urgent card.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of elevator manual emergency brake apparatus is located at including vertical opposite a pair of guide rails in elevator
In elevator and can along this to the guide rail as the lift car of oscilaltion campaign, set on the control of the lift car inner top
Device processed is set on the lift car, connect with the control device, being used for lift car described in real-time monitoring in elevator
Interior lifting speed and by the device for monitoring speed of the speed signal real-time transmission monitored to the control device, and
The urgent stop for connecting on the lift car, with the control device, being sent for receiving the control device
The urgent stop executing agency of urgent stop movement is executed after signal.
Further, the urgent stop executing agency includes being individually fixed in lower part at left and right sides of the lift car
First servo motor and the second servo motor are located at the lift car left bottom and drive end with the first servo motor
First safety tongs of connection, and connect positioned at the lift car bottom right side and with second servo motor driving end
Second safety tongs；
The control device is connect with the first servo motor and second servo motor respectively, the control device
The first servo motor and second servo motor are controlled after receiving the abnormal signal from the device for monitoring speed
It runs simultaneously, first safety tongs is lifted up with by first safety tongs simultaneously when the first servo motor is run
It is caught on the left of the lift car and is stopped between left rail with the lift car slows down to block, the second servo motor fortune
Second safety tongs is lifted up so that second safety tongs is caught in the lift car right side and right rail when row
Between with by the lift car slow down card stop.
Further, there are two the device for monitoring speed, it is respectively arranged in the top at left and right sides of the lift car.
Further, the device for monitoring speed includes the fixed branch of the horizontal measurement being fixed on the lift car side
Frame, is installed on the fixed bracket of the measurement and the compression pulley with respective side rails gliding contact, and is installed on the pressure
The rotary encoder connecting on the wheel shaft of tight pulley and with the control device.
Further, the control device includes the control box set on the lift car inner top, and is set to institute
State control box in microprocessor, storage power, data collecting card and servo-driver, the microprocessor respectively with the number
It is connected according to capture card with the servo-driver, the storage power connects with the microprocessor and the servo-driver respectively
It connects, all rotary encoders are connect with the data collecting card respectively, and the servo-driver is watched with described first respectively
Motor is taken to connect with second servo motor.
Further, the microprocessor is Intel Xeon E5-2698v4 microprocessor.
Compared with prior art, the invention has the following advantages:
The configuration of the present invention is simple, design is scientific and reasonable, easy to use, urgent stop executing agency include servo motor and with
The safety tongs of servo motor connection, centre do not have force transmission mechanism, and stroke is extremely short, can after microprocessor issues urgent stop instruction
Quickly lift car card is parked on guide rail, can effectively reduce elevator safety risk.
The present invention uses lifting speed of the device for monitoring speed real-time monitoring lift car in elevator, and will be monitored
To lift car lifting speed information pass through data collecting card in real time and be sent to microprocessor, when lift car lifting speed reaches
When to setting value (the 115% of national Specification elevator speed), microprocessor controls the by servo-driver simultaneously
One servo motor and the second servo motor synchronous operation, in the case where not by intermediate power transmission can directly by the first safety tongs with
Second safety tongs is lifted up, and safety tongs, which is caught between lift car and guide rail, is parked in lift car card on guide rail, stop speed
It spends fast, high-efficient, is run by Serve Motor Control safety tongs, safety tongs movement speed precision is high, safer, action test
It is easy to operate, it saves the time and improves maintenance efficiency, can effectively reduce elevator safety risk.
The present invention is accurate by the movement speed that rotary encoder monitoring velocity obtains, and action sensitivity is high, can be to the greatest extent
Urgent stop elevator carriage within the scope of small hypervelocity is measured, in addition, the present invention does not use limiter of speed, there is no need to be verified,
Maintenance unit and the workload of reviewer are greatly reduced, working efficiency is increased.With great application prospect.The present invention
There are two device for monitoring speed is set, lift car two sides are divided into, two groups of phase differences are exported using doubleway output rotary encoder,
Two groups of data can not only measure revolving speed, when can also judge the direction of rotation, that is, can grasp lift car in real time on
The motion state for rising or declining.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is device for monitoring speed structural schematic diagram of the present invention.
Fig. 3 is present system flow diagram.
Fig. 4 is workflow schematic diagram of the present invention.
Wherein, the corresponding title of appended drawing reference are as follows:
1- guide rail, 2- lift car, 3- control device, 4- device for monitoring speed, 5- first servo motor, the second servo of 6-
Motor, the first safety tongs of 7-, the second safety tongs of 8-, 9- measure fixed bracket, 10- compresses pulley, 11- rotary encoder, 12- control
Box processed, 13- microprocessor, 14- storage power, 15- data collecting card, 16- servo-driver.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
As shown in Figs 1-4, a kind of elevator manual emergency brake apparatus provided by the invention, structure is simple, design department
It learns rationally, easy to use, urgent stop executing agency includes servo motor and the safety tongs that connect with servo motor, and centre does not have
Force transmission mechanism, stroke is extremely short, and quickly lift car card can be parked on guide rail after microprocessor issues urgent stop instruction, can
Elevator safety risk is effectively reduced.The present invention includes vertical opposite a pair of guide rails 1 in elevator, is located in elevator simultaneously
Can along this to the guide rail 1 as the lift car 2 of oscilaltion campaign, set on the control device of 2 inner top of lift car
3, it is set on the lift car 2, connect with the control device 3, being used for lift car 2 described in real-time monitoring in elevator
Lifting speed and by the speed signal real-time transmission monitored to the device for monitoring speed 4 of the control device 3, and
The urgent system for connecting on the lift car 2, with the control device 3, being sent for receiving the control device 3
The urgent stop executing agency that urgent stop acts is executed after stopping signal.
Urgent stop executing agency of the present invention includes be individually fixed in 2 left and right sides lower part of lift car
One servo motor 5 and the second servo motor 6 are located at 2 left bottom of lift car and drive with the first servo motor 5
The first safety tongs 7 of connection is held, and is located at 2 bottom right side of lift car and drives end with second servo motor 6
Second safety tongs 8 of connection；The control device 3 connects with the first servo motor 5 and second servo motor 6 respectively
It connects, the control device 3 controls the first servo motor 5 after receiving the abnormal signal from the device for monitoring speed 4
It is run simultaneously simultaneously with second servo motor 6, when the first servo motor 5 is run upwards by first safety tongs 7
Lift so that first safety tongs 7 to be caught between 2 left side of lift car and left rail to subtract the lift car 2
Speed card stops, and second safety tongs 8 is lifted up when running to block second safety tongs 8 by second servo motor 6
Enter and is stopped between 2 right side of lift car and right rail with the lift car 2 slows down to block.
There are two device for monitoring speed 4 of the present invention, is respectively arranged in the top of 2 left and right sides of lift car.
The device for monitoring speed 4 includes the fixed bracket 9 of measurement that level is fixed on 2 side of lift car, is installed on described
Measurement is fixed on bracket 9 and the compression pulley 10 with 1 gliding contact of respective side rails, and is installed on the compression pulley 10
The rotary encoder 11 being connect on wheel shaft and with the control device 3.
The present invention is accurate by the movement speed that rotary encoder monitoring velocity obtains, and action sensitivity is high, can be to the greatest extent
Urgent stop elevator carriage within the scope of small hypervelocity is measured, in addition, the present invention does not use limiter of speed, there is no need to be verified,
Maintenance unit and the workload of reviewer are greatly reduced, working efficiency is increased.With great application prospect.The present invention
There are two device for monitoring speed is set, lift car two sides are divided into, two groups of phase differences are exported using doubleway output rotary encoder,
Two groups of data can not only measure revolving speed, when can also judge the direction of rotation, that is, can grasp lift car in real time on
The motion state for rising or declining.
Control device 3 of the present invention includes the control box 12 set on 2 inner top of lift car, and is set to institute
State microprocessor 13, storage power 14, data collecting card 15 and the servo-driver 16 in control box 12, the microprocessor 13
Connect respectively with the data collecting card 15 and the servo-driver 16, the storage power 14 respectively with the microprocessor
13 and the servo-driver 16 connect, all rotary encoders 11 are connect with the data collecting card 15 respectively, described
Servo-driver 16 is connect with the first servo motor 5 and second servo motor 6 respectively, and the microprocessor 13 is
Intel Xeon E5-2698v4 microprocessor.
The present invention uses lifting speed of the device for monitoring speed real-time monitoring lift car in elevator, and will be monitored
To lift car lifting speed information pass through data collecting card in real time and be sent to microprocessor, when lift car lifting speed reaches
When to setting value (the 115% of national Specification elevator speed), microprocessor controls the by servo-driver simultaneously
One servo motor and the second servo motor synchronous operation, in the case where not by intermediate power transmission can directly by the first safety tongs with
Second safety tongs is lifted up, and safety tongs, which is caught between lift car and guide rail, is parked in lift car card on guide rail, stop speed
It spends fast, high-efficient, is run by Serve Motor Control safety tongs, safety tongs movement speed precision is high, safer, action test
It is easy to operate, it saves the time and improves maintenance efficiency, can effectively reduce elevator safety risk.
As shown in Figures 3 and 4, the working principle of mechanical action device of the present invention are as follows: rotary encoder real-time monitoring, which compresses, to be slided
The revolving speed of wheel, data collecting card acquire the monitoring signals of rotary encoder in real time and the collected signal of institute are sent to micro process
Device, microprocessor is in real time by setting value (the national Specification elevator speed in received signal and microprocessor
115%) be compared, when comparison result show elevator speed meet or exceed setting value (national Specification elevator
The 115% of the speed of service) when, assign urgent stop to servo-driver and instruct, servo-driver control first servo motor and
Second servo motor is run simultaneously simultaneously, and first servo motor and the second servo motor are respectively by the first safety tongs and the second safety
Pincers are up promoted to be respectively clamped between lift car two sides and respective track, and the first safety tongs and the second safety tongs synchronize
It rises, so that lift car quick and stable card is parked on guide rail.
Rotary encoder of the present invention by being mounted on the pulley slided with guide rail, can real―time precision measurment go out the fortune of elevator
Row speed data, feeds back to the microprocessor for being mounted on car top by the collected information of data collecting card, microprocessor according to
Pre-set safe speed is compared, once being more than the 115% of national Specification speed, is driven immediately by servo
Dynamic device issues command signal and gives the servo motor that elevator safety gear is connected, and servo motor directly triggers elevator safety gear, makes
Car safety stops on guide rail.Meanwhile whether servo motor can be braked completely with real-time detection safety tongs, if safety
Pincers are not braked completely, and further progress lifting braking is watched after dangerous situation excludes after feeding back to driver by servo motor
It takes motor driven safety tongs and comes downwards to lift car two sides of the bottom, elevator restores to operate normally.
Whole nation elevator ownership is more than 5,000,000 at present, and newly-increased elevator is increased every year with 8% speed, can directly be utilized
Quantity that the invention device is newly installed and is transformed and its huge.
The expense of limiter of speed periodic check is probably 200 yuan/platform, limiter of speed, speed limiter wire rope and tensioning apparatus at present
Expense estimated 3000 yuan of expense/set or more is calculated according to speed and height.Meanwhile large-scale residential quarters are large number of, elevator
Substantial amounts, limiter of speed verification and adjustment need plenty of time and trivial operations, and high-rise and express elevator limiter of speed steel
It is high that cord replaces degree of danger height, renewal cost.
Therefore, the present invention directly can save a large amount of economic costs every year for society, and safety tongs action test is simple, and elevator is protected
Feeding unit receives to carry out all standing experiment very much.To ensure that social public security.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
It encloses, as long as that in body design thought of the invention and mentally makes has no the change of essential meaning or polishing, is solved
The technical issues of it is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (6)
1. a kind of elevator manual emergency brake apparatus, it is characterised in that: including vertical opposite a pair in elevator
Guide rail (1) is located in elevator and can make along this to the guide rail (1) lift car (2) of oscilaltion campaign, is set to described
The control device (3) of lift car (2) inner top is set on the lift car (2), connect, uses with the control device (3)
The lift car described in real-time monitoring (2) lifting speed and the speed signal real-time transmission that will be monitored in elevator
To the control device (3) device for monitoring speed (4), and be set to the lift car (2) on, with the control device
(3) it connects, for executing the urgent of urgent stop movement after receiving the urgent stop signal that the control device (3) is sent
Stop executing agency.
2. a kind of elevator manual emergency brake apparatus according to claim 1, it is characterised in that: the urgent stop
Executing agency includes the first servo motor (5) and the second servo for being individually fixed in lower part at left and right sides of the lift car (2)
Motor (6), the first peace for being located at the lift car (2) left bottom and being connect with the first servo motor (5) driving end
Full pincers (7), and be located at the lift car (2) bottom right side and connect with second servo motor (6) driving end the
Two safety tongs (8)；
The control device (3) connect with the first servo motor (5) and second servo motor (6) respectively, the control
Device (3) processed controls the first servo motor (5) and institute after receiving the abnormal signal from the device for monitoring speed (4)
State the second servo motor (6) while running simultaneously, the first servo motor (5) run when by first safety tongs (7) to
On lift so that first safety tongs (7) to be caught on the left of the lift car (2) between left rail with by the elevator
Carriage (2) slow down card stops, second servo motor (6) run when will second safety tongs (8) be lifted up with will described in
Second safety tongs (8), which is caught on the right side of the lift car (2), to be blocked between right rail with the lift car (2) slow down
Stop.
3. a kind of elevator manual emergency brake apparatus according to claim 2, it is characterised in that: the speed monitoring
There are two devices (4), is respectively arranged in the top at left and right sides of the lift car (2).
4. a kind of elevator manual emergency brake apparatus according to claim 3, it is characterised in that: the speed monitoring
Device (4) includes measurement fixation bracket (9) that level is fixed on the lift car (2) side, and it is solid to be installed on the measurement
Compression pulley (10) on fixed rack (9) and with respective side rails (1) gliding contact, and it is installed on the compression pulley (10)
Wheel shaft on and the rotary encoder (11) that is connect with the control device (3).
5. a kind of elevator manual emergency brake apparatus according to claim 4, it is characterised in that: the control device
It (3) include being set to the control box (12) of the lift car (2) inner top, and be set to the micro- place controlled in box (12)
Manage device (13), storage power (14), data collecting card (15) and servo-driver (16), the microprocessor (13) respectively with institute
State data collecting card (15) and the servo-driver (16) connection, the storage power (14) respectively with the microprocessor
(13) connect respectively with the data collecting card (15) with the servo-driver (16) connection, all rotary encoders (11)
It connects, the servo-driver (16) connect with the first servo motor (5) and second servo motor (6) respectively.
6. a kind of elevator manual emergency brake apparatus according to claim 5, it is characterised in that: the microprocessor
It (13) is Intel Xeon E5-2698 v4 microprocessor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910319942.9A CN110040600A (en) | 2019-04-19 | 2019-04-19 | A kind of elevator manual emergency brake apparatus |
| CN201911190431.8A CN110723617A (en) | 2019-04-19 | 2019-11-28 | Elevator overspeed emergency braking protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910319942.9A CN110040600A (en) | 2019-04-19 | 2019-04-19 | A kind of elevator manual emergency brake apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110040600A true CN110040600A (en) | 2019-07-23 |
Family
ID=67278187
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910319942.9A Pending CN110040600A (en) | 2019-04-19 | 2019-04-19 | A kind of elevator manual emergency brake apparatus |
| CN201911190431.8A Pending CN110723617A (en) | 2019-04-19 | 2019-11-28 | Elevator overspeed emergency braking protection system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911190431.8A Pending CN110723617A (en) | 2019-04-19 | 2019-11-28 | Elevator overspeed emergency braking protection system |
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| Country | Link |
|---|---|
| CN (2) | CN110040600A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114084771A (en) * | 2021-11-25 | 2022-02-25 | 菱王电梯有限公司 | Elevator guide rail braking device and elevator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014121A (en) * | 2021-12-03 | 2022-02-08 | 未来物语(深圳)科技有限公司 | Elevator system and control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203143865U (en) * | 2013-04-07 | 2013-08-21 | 上海微频莱机电科技有限公司 | Elevator safety gear triggered by electromagnetic force |
| CN105000446B (en) * | 2015-08-13 | 2017-04-12 | 卫小兵 | Device for preventing elevator car from moving accidentally |
| CN105384032A (en) * | 2015-12-24 | 2016-03-09 | 广州永日电梯有限公司 | Method for preventing accidental movement of elevator car |
| CN106516933B (en) * | 2016-12-20 | 2018-01-09 | 刘英辉 | A kind of braking method of electrodynamic type safety tongs device and electrodynamic type safety tongs device |
| CN207671486U (en) * | 2017-12-26 | 2018-07-31 | 杭州西奥电梯有限公司 | A kind of drop preventer of elevator |
| CN208700346U (en) * | 2018-07-24 | 2019-04-05 | 四川省特种设备检验研究院 | A kind of urgent stop protection system of novel elevator |
-
2019
- 2019-04-19 CN CN201910319942.9A patent/CN110040600A/en active Pending
- 2019-11-28 CN CN201911190431.8A patent/CN110723617A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114084771A (en) * | 2021-11-25 | 2022-02-25 | 菱王电梯有限公司 | Elevator guide rail braking device and elevator |
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|---|---|
| CN110723617A (en) | 2020-01-24 |
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Application publication date: 20190723 |