CN114084769A - Elevator load test safety protection device and method - Google Patents
Elevator load test safety protection device and method Download PDFInfo
- Publication number
- CN114084769A CN114084769A CN202111494125.0A CN202111494125A CN114084769A CN 114084769 A CN114084769 A CN 114084769A CN 202111494125 A CN202111494125 A CN 202111494125A CN 114084769 A CN114084769 A CN 114084769A
- Authority
- CN
- China
- Prior art keywords
- clamp
- load test
- elevator
- sliding
- block
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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
-
- 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
- B66B5/14—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of excessive loads
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a safety protection device and a method for an elevator load test.A slide block is positioned between two clamp blocks, one slide block corresponds to one clamp block and a self-locking mechanism, wherein the slide block is in sliding connection with the clamp block through a dovetail groove mechanism; the speed limiter steel wire rope penetrates through the base and the shell, is positioned between the two sliding blocks, and is connected with the two clamp blocks through the electric push rod; the controller is connected with the electric power push rod and the self-locking mechanism, and the device can effectively solve the problem that the low-speed slip brake is unreliable in the elevator 1.25 times of rated load test process.
Description
Technical Field
The invention belongs to the technical field of elevator safety protection, and particularly relates to an elevator accidental movement safety protection device and method.
Background
The elevator, as the sign of human civilization, through the development of 150 years, each technical indicator is becoming mature day by day. However, with the increase of the service life and the service frequency of the elevator, the elevator safety protection component is difficult to wear and age, and becomes a potential hidden trouble for the safe operation of the elevator. The brake is the primary safety protection component for the safe operation of the elevator, and the operation performance of the brake is directly related to whether the elevator can safely operate or not. Therefore, in the routine maintenance of the elevator, it is necessary to heavily check whether the brake components are intact. However, the parts of the elevator brake are often packaged, and whether the performance of the elevator brake reaches the standard or not is difficult to judge by visual inspection and no-load test, so that a notification about implementing a plurality of problems of < elevator supervision and inspection and periodic inspection rule > No. 2 modification list is issued by the national quality inspection Bureau in 10 months in 2017, and a 1.25-time rated load brake test is required to be performed every 5 years by using a passenger elevator. Because the elevator 1.25 times rated load test is an operation test with certain destructive power, the elevator traction condition can be destroyed in the moment of emergency braking of the elevator, and the elevator car can slide down out of control.
Although the existing elevator is provided with a speed limiter for monitoring the overspeed operation of a car, the car usually slides at a low speed after the elevator is braked, at the moment, the speed limiter is difficult to monitor the overspeed descending of the elevator, the accidents of car bottom squat and counter-weight top rushing are caused, and the serious damage or even personal injury of an elevator traction system can be caused in serious cases.
In addition, the elevator down braking test needs 1.25 times of load to be put into the car, and in the load handling process, if the brake braking force is insufficient, the elevator opens the door and slips, so that the serious safety risk of personnel shearing exists. At present, each elevator manufacturer sets an accidental movement protection device for door opening sliding, but the protection device works under the condition that the performance of an elevator brake is finished. When the brake has insufficient braking force, the elevator is difficult to guarantee to brake in time under the condition of loading a certain load.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a safety protection device and a safety protection method for an elevator load test, and the device and the method can effectively solve the problem that low-speed slip stopping is unreliable in the elevator load test process by 1.25 times.
In order to achieve the aim, the elevator load test safety protection device comprises a controller, a base, a shell, a speed limiter steel wire rope, an electric push rod, two sliding blocks, two clamp blocks and two self-locking mechanisms for limiting the clamp blocks;
the two sliding blocks are positioned between the two clamp blocks, one sliding block corresponds to one clamp block and one self-locking mechanism, the sliding blocks are in sliding connection with the clamp blocks through a dovetail groove mechanism, a sliding groove is formed in the base, the bottom of the clamp block is inserted into the sliding groove, the shell is fixed on the base, the side face of the clamp block is connected with the shell through a brake spring, and the top of the sliding block is connected with the shell through a reset tension spring;
the speed limiter steel wire rope penetrates through the base and the shell, is positioned between the two sliding blocks, and is connected with the two clamp blocks through the electric push rod;
the controller is connected with the electric push rod and the self-locking mechanism.
The self-locking mechanism comprises a sleeve, a first electromagnet and a second electromagnet are arranged in the sleeve, a limiting groove is formed in the bottom of the clamp block, a groove-shaped through hole is formed in the base, an iron core in the first electromagnet and an iron core in the second electromagnet can penetrate through the groove-shaped through hole to be inserted into the limiting groove, and power supply control ends of the first electromagnet and the second electromagnet are connected with the controller.
The electric push rod is connected with the clamp block through a connecting pin.
A rope guide is arranged on the shell, wherein the speed limiter steel wire rope penetrates through the rope guide.
The base is fixed on the guide rail through a porous plate and a bolt.
One end of the mounting frame is hinged with the base, and the other end of the mounting frame is fixed on the guide rail through a bolt and a pressing plate.
The slide block is provided with an anti-skid groove.
The sleeve is fixed at the bottom of the base through a bolt.
The middle part of the electric power push rod is fixed on the base through a bolt and a fixing plate.
The safety protection method for the elevator load test comprises the following steps:
in the process of a 1.25-time rated load test of the elevator, when the controller detects that the elevator is out of control due to low-speed sliding, the controller sends a starting signal to control the iron core of a first electromagnet in the self-locking mechanism to retract into the sleeve, a brake spring is instantaneously expanded to push two clamp blocks to slide in the sliding groove in the opposite direction, and the sliding blocks move in the opposite direction along with the clamp blocks simultaneously and finally contact with a steel wire rope of a speed limiter; after the clamp block slides, the iron core of the second electromagnet is popped out and inserted into the limiting groove, and the clamp block is locked at a preset working position;
after the steel wire rope of the speed limiter is contacted with the sliding block, the sliding block is driven to continuously descend through friction force until the steel wire rope of the speed limiter is tightly clamped, the elevator continues to descend, and the steel wire rope of the speed limiter lifts a safety gear to act to stop the elevator car from sliding;
when the safety risk of the braking car is eliminated, the controller sends a completion signal to control the iron core of the second electromagnet in the self-locking mechanism to retract into the sleeve, the work limitation on the clamp block is removed, meanwhile, the controller controls the electric push rod to stretch out and push the clamp block, so that the clamp block returns to the initial position, the iron core in the first electromagnet pops out and is inserted into the limiting groove, in the resetting process of the clamp block, the slide block returns to the initial position under the action of the resetting tension spring, and finally, the electric push rod automatically resets to the original state.
The invention has the following beneficial effects:
when the safety protection device and the method for the elevator load test are operated specifically, when a controller detects that the elevator is out of control due to low-speed sliding, an iron core of a first electromagnet in a self-locking mechanism retracts into a sleeve, a brake spring is expanded instantaneously to push two clamp blocks to slide in a sliding groove in the opposite direction, and sliding blocks move in the opposite direction along with the clamp blocks simultaneously and finally contact a steel wire rope of a speed limiter; after the clamp block slides, the iron core of the second electromagnet is popped out and inserted into the limiting groove, the clamp block is locked at a preset working position, then the sliding block is driven to continue descending through friction force after the speed limiter steel wire rope is contacted with the sliding block until the speed limiter steel wire rope is tightly clamped, the elevator continues descending, the speed limiter steel wire rope pulls the safety clamp to act to stop the elevator car to slide, and the problem that the low-speed sliding stop is unreliable in the 1.25 times of rated load test process of the elevator is effectively solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a state diagram of the operation of the present invention;
FIG. 3 is a schematic view of the installation of the present invention;
fig. 4 is a schematic structural view of the rope guide 5.
The device comprises a sliding block 1, a clamp block 2, a brake spring 3, a self-locking mechanism 4, a first electromagnet 401, a second electromagnet 402, a sleeve 403, a rope guide 5, a reset tension spring 6, a fixing plate 7, a shell 8, a base 9, an electric push rod 10, a connecting pin 11, an installation frame 12, a guide rail 13 and a speed governor steel wire rope 14.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1 to 4, the elevator load test safety protection device comprises a controller, a base 9, a shell 8, a speed limiter steel wire rope 14, an electric power push rod 10, two sliding blocks 1, two clamp blocks 2 and two self-locking mechanisms 4 for limiting the clamp blocks 2;
the two sliding blocks 1 are positioned between the two clamp blocks 2, one sliding block 1 corresponds to one clamp block 2 and one self-locking mechanism 4, wherein the sliding block 1 is in sliding connection with the clamp block 2 through a dovetail groove mechanism, a sliding groove is formed in a base 9, the bottom of the clamp block 2 is inserted into the sliding groove, a shell 8 is fixed on the base 9, the side face of the clamp block 2 is connected with the shell 8 through a brake spring 3, and the top of the sliding block 1 is connected with the shell 8 through a reset tension spring 6;
the self-locking mechanism 4 comprises a sleeve 403, a first electromagnet 401 and a second electromagnet 402 are arranged in the sleeve 403, a limiting groove is formed in the bottom of the clamp block 2, a groove-shaped through hole is formed in the base 9, and an iron core in the first electromagnet 401 and an iron core in the second electromagnet 402 can penetrate through the groove-shaped through hole and are inserted into the limiting groove;
the speed governor rope 14 passes through the base 9 and the housing 8, and the speed governor rope 14 is located between the two sliders 1. The two clamp blocks 2 are connected by an electric push rod 10, wherein the electric push rod 10 is connected with the clamp blocks 2 by a connecting pin 11.
A rope guide 5 is arranged on the housing 8, wherein a speed governor rope 14 passes through the rope guide 5. The base 9 is fixed on the guide rail 13 through a perforated plate and a bolt, one end of the mounting frame 12 is hinged with the base 9, and the other end of the mounting frame 12 is fixed on the guide rail 13 through a bolt and a pressing plate.
The sliding block 1 is provided with an anti-slip groove, and the sleeve 403 is fixed at the bottom of the base 9 through bolts. The middle part of the electric power push rod 10 is fixed on the base 9 through bolts and a fixing plate 7.
The safety protection method for the elevator load test comprises the following steps:
in the process of a 1.25-time rated load test of the elevator, when the controller detects that the elevator is out of control due to low-speed slippage, the controller sends a starting signal to control the iron core of the first electromagnet 401 in the self-locking mechanism 4 to retract into the sleeve 403, the limited opening working mode of the clamp blocks 2 is opened, the brake spring 3 is instantaneously opened to push the two clamp blocks 2 to slide oppositely in the sliding chute, and the sliding blocks 1 move oppositely along with the clamp blocks 2 at the same time and finally contact the steel wire rope 14 of the speed limiter; the second electromagnet 402 is set to be in a time-delay action mode, and after the clamp block 2 slides, the iron core of the second electromagnet 402 is ejected out and inserted into the limit groove, so as to lock the clamp block 2 at a preset working position, as shown in fig. 2.
An anti-slip groove is formed in the end face of the sliding block 1, the sliding block 1 is driven to continuously descend through friction force after the steel wire rope is in contact with the anti-slip groove until the speed limiter steel wire rope 14 is tightly clamped, the elevator continues to descend, and the speed limiter steel wire rope 14 lifts the safety tongs to stop the car from sliding.
After the safety risk of the car is eliminated, the controller sends a completion signal to control the iron core of the second electromagnet 402 in the self-locking mechanism 4 to retract into the sleeve 403, the work limitation on the clamp block 2 is removed, meanwhile, the controller controls the electric power push rod 10 to extend out to push the clamp block 2, so that the clamp block 2 retracts to the initial position, the iron core in the first electromagnet 401 pops out and is inserted into the limiting groove, as shown in fig. 1, in the resetting process of the clamp block 2, the slide block 1 returns to the initial position under the action of the reset tension spring 6, and finally, the electric power push rod 10 automatically resets to the original state.
While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. A safety protection device for an elevator load test is characterized by comprising a controller, a base (9), a shell (8), a speed limiter steel wire rope (14), an electric push rod (10), two sliding blocks (1), two clamp blocks (2) and two self-locking mechanisms (4) for limiting the clamp blocks (2);
the two sliding blocks (1) are positioned between the two clamp blocks (2), one sliding block (1) corresponds to one clamp block (2) and one self-locking mechanism (4), wherein the sliding block (1) is in sliding connection with the clamp blocks (2) through a dovetail groove mechanism, a sliding groove is formed in a base (9), the bottom of each clamp block (2) is inserted into the sliding groove, a shell (8) is fixed on the base (9), the side face of each clamp block (2) is connected with the shell (8) through a brake spring (3), and the top of the sliding block (1) is connected with the shell (8) through a reset tension spring (6);
a speed governor steel wire rope (14) penetrates through the base (9) and the shell (8), the speed governor steel wire rope (14) is positioned between the two sliding blocks (1), and the two clamp blocks (2) are connected through an electric push rod (10);
the controller is connected with the electric push rod (10) and the self-locking mechanism (4).
2. The elevator load test safety protection device according to claim 1, wherein the self-locking mechanism (4) comprises a sleeve (403), a first electromagnet (401) and a second electromagnet (402) are arranged in the sleeve (403), a limiting groove is formed in the bottom of the clamp block (2), a groove-shaped through hole is formed in the base (9), an iron core in the first electromagnet (401) and an iron core in the second electromagnet (402) can penetrate through the groove-shaped through hole to be inserted into the limiting groove, and power supply control ends of the first electromagnet (401) and the second electromagnet (402) are connected with a controller.
3. An elevator load test safety protection device according to claim 1, characterized in that the electric power push rod (10) is connected with the tong block (2) by a connecting pin (11).
4. An elevator load test safety protection arrangement according to claim 1, characterized in that a rope guide (5) is arranged on the housing (8), wherein a speed limiter rope (14) passes through the rope guide (5).
5. An elevator load test safety protection device according to claim 1, characterized in that the base (9) is fixed to the guide rail (13) by means of a perforated plate and bolts.
6. An elevator load test safety protection device according to claim 1, characterized in that one end of the mounting frame (12) is hinged with the base (9), and the other end of the mounting frame (12) is fixed on the guide rail (13) through a bolt and a pressing plate.
7. An elevator load test safety protection device according to claim 1, characterized in that the slide block (1) is provided with an anti-slip groove.
8. An elevator load test safety protection device according to claim 1, characterized in that the sleeve (403) is fixed to the bottom of the base (9) by means of bolts.
9. An elevator load test safety protection device according to claim 1, characterized in that the middle part of the electric power push rod (10) is fixed on the base (9) through bolts and a fixing plate (7).
10. An elevator load test safety protection method is characterized in that the elevator load test safety protection device based on claim 2 comprises the following steps:
in the process of a 1.25-time rated load test of an elevator, when a controller detects that the elevator is out of control due to low-speed sliding, the controller sends a starting signal to control an iron core of a first electromagnet (401) in a self-locking mechanism (4) to retract into a sleeve (403), a brake spring (3) is instantaneously expanded to push two clamp blocks (2) to slide in a sliding groove in opposite directions, and a sliding block (1) moves in opposite directions along with the clamp blocks (2) at the same time and finally contacts a speed governor steel wire rope (14); after the clamp block (2) slides, an iron core of the second electromagnet (402) is ejected out and inserted into the limiting groove, and the clamp block (2) is locked at a preset working position;
after the speed limiter steel wire rope (14) is contacted with the sliding block (1), the sliding block (1) is driven to continuously descend through friction force until the speed limiter steel wire rope (14) is tightly clamped, the elevator continues to descend, and the speed limiter steel wire rope (14) acts to pull a safety clamp to stop the car from sliding;
when the safety risk of the braking car is eliminated, the controller sends a completion signal to control the iron core of the second electromagnet (402) in the self-locking mechanism (4) to retract into the sleeve (403), the working limitation on the clamp block (2) is removed, meanwhile, the controller controls the electric power push rod (10) to extend out to push the clamp block (2), so that the clamp block (2) retracts to the initial position, the iron core in the first electromagnet (401) pops out and is inserted into the limiting groove, in the resetting process of the clamp block (2), the slide block (1) returns to the initial position under the action of the resetting tension spring (6), and finally, the electric power push rod (10) automatically resets to the original state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111494125.0A CN114084769A (en) | 2021-12-08 | 2021-12-08 | Elevator load test safety protection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111494125.0A CN114084769A (en) | 2021-12-08 | 2021-12-08 | Elevator load test safety protection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114084769A true CN114084769A (en) | 2022-02-25 |
Family
ID=80306952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111494125.0A Pending CN114084769A (en) | 2021-12-08 | 2021-12-08 | Elevator load test safety protection device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114084769A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011116485A (en) * | 2009-12-02 | 2011-06-16 | Hitachi Ltd | Elevator |
| CN104812689A (en) * | 2012-11-27 | 2015-07-29 | 因温特奥股份公司 | Safety catch for traveling body of elevator system |
| CN204624883U (en) * | 2015-03-25 | 2015-09-09 | 浙江西直门电梯有限公司 | A kind of novel elevator safety tongs |
| CN109019239A (en) * | 2017-06-12 | 2018-12-18 | 上海三菱电梯有限公司 | Brake controller of elevator |
| CN110436296A (en) * | 2018-05-02 | 2019-11-12 | 陕西小溪机电科技有限公司 | A kind of towed elevator emergency braking limiter of speed |
| CN216512249U (en) * | 2021-12-08 | 2022-05-13 | 陕西省特种设备检验检测研究院 | Elevator load test safety arrangement |
-
2021
- 2021-12-08 CN CN202111494125.0A patent/CN114084769A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011116485A (en) * | 2009-12-02 | 2011-06-16 | Hitachi Ltd | Elevator |
| CN104812689A (en) * | 2012-11-27 | 2015-07-29 | 因温特奥股份公司 | Safety catch for traveling body of elevator system |
| CN204624883U (en) * | 2015-03-25 | 2015-09-09 | 浙江西直门电梯有限公司 | A kind of novel elevator safety tongs |
| CN109019239A (en) * | 2017-06-12 | 2018-12-18 | 上海三菱电梯有限公司 | Brake controller of elevator |
| CN110436296A (en) * | 2018-05-02 | 2019-11-12 | 陕西小溪机电科技有限公司 | A kind of towed elevator emergency braking limiter of speed |
| CN216512249U (en) * | 2021-12-08 | 2022-05-13 | 陕西省特种设备检验检测研究院 | Elevator load test safety arrangement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216512249U (en) | Elevator load test safety arrangement | |
| CN102674108B (en) | Electronic control brake device for elevator cage | |
| CN103935858B (en) | A kind of traction machine brake automatic detection device | |
| CN104495547A (en) | Detection method of lift traction machine brake | |
| CN102730511B (en) | Anti-drop protection device and lifter | |
| CN110482094B (en) | Cargo bed with novel anti-falling mechanism and method thereof | |
| CN104724565A (en) | Elevator brake device with trigger mechanism | |
| CN203767794U (en) | Electromechanical flexible flat layer security clamp | |
| JP5603755B2 (en) | Elevator equipment | |
| CN209143428U (en) | A kind of safety catch | |
| CN114084769A (en) | Elevator load test safety protection device and method | |
| CN204038796U (en) | A kind of elevator based on force feedback and escalator brake monitor control mechanism | |
| CN107215798B (en) | Brake performance early warning system of hydraulic crane hoisting mechanism | |
| CN114772410B (en) | Elevator car deceleration-stopping intelligent system | |
| CN110670931B (en) | Garage system capable of safely operating and operation method | |
| CN108928741A (en) | A kind of guard method after crane brake failure | |
| CN214359618U (en) | 125% times rated load brake test protection device for traction elevator | |
| CN105173963A (en) | Elevator car accidental movement control device | |
| CN109335912B (en) | Triggering device of elevator safety protection equipment | |
| CN106966302A (en) | A kind of large scale hoisting machinery wind-proof iron wedge fall-preventing protection device and method | |
| CN111762659A (en) | Traction elevator safety monitoring system | |
| CN112811277A (en) | 125% times rated load brake test protection device and method for traction elevator | |
| CN204873336U (en) | Unexpected amount of movement controlling means of elevator car | |
| CN211393451U (en) | Novel self-tightening brake | |
| JP2000143115A (en) | Rescue operation device for elevator at the time of failure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |