CN102431865A - Fall prevention mechanism of elevator and elevator equipped with same - Google Patents
Fall prevention mechanism of elevator and elevator equipped with same Download PDFInfo
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- CN102431865A CN102431865A CN2011102968808A CN201110296880A CN102431865A CN 102431865 A CN102431865 A CN 102431865A CN 2011102968808 A CN2011102968808 A CN 2011102968808A CN 201110296880 A CN201110296880 A CN 201110296880A CN 102431865 A CN102431865 A CN 102431865A
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Abstract
The invention relates to a fall prevention mechanism of an elevator and an elevator equipped with the same. The fall prevention mechanism comprises a traction steel cable and a traction rod, wherein the traction steel cable and the traction rod are arranged above a cage, the traction steel cable is positioned above the traction rod, the upper end of the traction rod is connected with one end of the traction steel cable, the lower end of the traction rod is connected with a fall prevention hammer device, the fall prevention hammer device is connected with a locking device, both of the fall prevention hammer device and the locking device are positioned above the cage, the traction steel cable is made of high-carbon steel with carbon content of 1.1 to 1.7 percent, the tensile strength of the traction steel cable is between 1,300 and 1,800MPa, a lubricant used on the traction steel cable is a water-based graphitic lubricant consisting of graphite, composite resin and various additives, and the elevator is preferably a vehicle carrying elevator and is provided with the fall prevention mechanism. The fall prevention mechanism is simple in structure, accurate in positioning and high in braking speed, is convenient to maintain, and can effectively prevent the elevator from falling.
Description
Technical field
The present invention relates to the safety control mechanism of elevator, particularly relate to the anti-falling mechanism of elevator and the elevator of this mechanism is housed.
Background technology
Along with operating stably of national economy and accelerating development of urbanization construction; The land resources in many cities is more and more nervous, and skyscraper is also more and more, and railway and highway system is faced with acid test especially; Therefore, elevator is absolutely necessary as a kind of vertical vehicle.Along with increasing of urban population and vehicle; The problem of " parking difficulty " is especially outstanding; The road in front of the door of public places such as some hospitals, market, school, hotel often stops up, and this not only affects the traffic and the looks in city, is perplexing the process of urban development more.How to solve " parking difficulty " this present situation, become the topic that the whole society receives much concern.
Nowadays, let the car pool elevator stop in tens layers the high building and become reality, this parking mode is practiced thrift the soil, can effectively alleviate the problem of city " parking difficulty ".It is more a lot of greatly than conventional lift space to carry the car elevator, can hold a baby truck, and the weight of carrying is also very big, can reach several tons.Carrying the car elevator is a kind of special elevator that solves automobile vertical transport problem, compares with traditional car ramp, and it can save 80% building area and the above automobile week transfer efficient of twice.No matter be to carry car elevator or conventional lift, it is full-automatic, time saving and energy saving to go up and down, and easy to operate, behind the entering elevator, presses the button, and just can arrive high level in one or two minute.
Though elevator has many good qualities, also brought convenience to people, elevator lacks safety guard in the process of vertical lift.Because the weight of carrying is very heavy, particularly, can produce strong impact force to elevator, and act directly on the brake gear of elevator in the moment of goods or automobile turnover car or car up-down, possibly cause car to fall.In addition,, cable wire is skidded in grooving, thereby cause traction to descend, car is fallen because the lubricating oil of adhering on wearing and tearing, distortion and the cable wire of traction sheave grooving is too much.If under overweight situation, move, cable wire ruptures probably, loses traction, car is fallen cause the accident.This shows that the design of the anti-falling mechanism of elevator is particularly important.
In the prior art, adopt the falling proof device of bolt-type usually.The bolt-type falling proof device makes it can keep vacant state through the degree of freedom of latch restriction car in the vertical direction.Application number is the elevator anti-fall device that 93207901.6 utility model patent discloses a kind of bolt-type.Application number is that the utility model patent of 200720130048.X discloses a kind of improved bolt-type anti-fall device that carries out.But also there is certain defective in the bolt-type anti-fall device, and for example latch degree of freedom in the horizontal direction is not restricted, and causes it still stable inadequately down in working order; In case latch skids off from lockhole; Major accident will take place, and complex structure, require the accuracy of positioning of system high; Break down easily, safeguard also inconvenient.Application number is that 201020216692.0 utility model patent discloses a kind of vertical lift type parking equipment with anti-drop function; The wire holder that utilization is installed on the elevator frame grasps anti-fall steel rope; Can prevent that the elevator frame from falling, but the degree of tightness of wire holder is difficult to control, in case clamper is lax; Anti-fall steel rope just comes off, and elevator also can fall.
Summary of the invention
The present invention has overcome deficiency of the prior art, at this a kind of anti-falling mechanism of elevator is provided.
For solving the technical matters of above-mentioned existence, the technical scheme that the present invention adopts is: the anti-falling mechanism of elevator comprises car, traction cable wire and traction bar; Said traction cable wire and traction bar are positioned at the top of car; Said traction cable wire is positioned at the top of traction bar, and the upper end of traction bar is connected with an end of traction cable wire, and the lower end of traction bar is connected with anti-drop ball device; Said anti-drop ball device is connected with Locking Device, and anti-drop ball device and Locking Device are positioned at the top of car.
When elevator normally moved, anti-drop ball drove locking plate, and the locking plate retainer makes locking plate be in horizontality, has certain clearance between hole on the locking plate and the locking rail, scratches to prevent hole and locking rail on the locking plate, influences elevator and normally moves; During used during elevator falling, anti-drop ball descends, the cylinder on the compressing locking plate, and locking plate is rotating shaft deflection with the locking plate retainer, makes locking plate block the locking rail, elevator stops tenesmus.
The advantage of the anti-falling mechanism of elevator of the present invention is simple in structure, and accurate positioning is easy to maintenance; Retro-speed is fast, and impulsive force is little, can effectively prevent falling of elevator.
Preferably, said elevator is for carrying the car elevator.The anti-falling mechanism of above-mentioned elevator is more suitable for being installed on the heavier elevator of load-carrying capacity, is one of the heaviest elevator of present load-carrying capacity and carry the car elevator.It is more a lot of greatly than the space of conventional lift to carry the car elevator, can hold a baby truck, and the weight of carrying is also very big, can reach several tons, adopts above-mentioned anti-falling mechanism can guarantee to carry the safe operation of car elevator.
Preferably, said anti-drop ball device comprises anti-drop ball, anti-drop ball framework and anti-drop ball retracing spring.This device is used for receiving and transmitting traction, and through the mutual action between three parts on the device, the traction bar transmits the traction of getting off and passes to car the most at last, and car is moved up and down.
Preferably, said anti-drop ball framework is arranged at the top of car, and is connected with the top of car.Anti-drop ball framework passes to car through being connected with the top of car with traction, and drives car up-down operation.
Preferably, said anti-drop ball is arranged at anti-drop ball inside of frame, and the upper end of anti-drop ball is parallel with the top of anti-drop ball framework, and the lower end of anti-drop ball places on the base of traction bar.This structure can make the traction bar transmit the traction of getting off and pass to anti-drop ball, closely passes to the miscellaneous part on the anti-drop ball device, to guarantee that traction is constantly to front transfer.
Preferably, said anti-drop ball retracing spring is arranged between the top of anti-drop ball and anti-drop ball framework.The effect of this structure is anti-drop ball retracing spring through the compression of himself or upsprings and traction is passed to the anti-drop ball framework of its top, to guarantee that traction continues to transmit.
Preferably, said traction bar passes the top of anti-drop ball, anti-drop ball retracing spring and anti-drop ball framework from bottom to up successively, and four are positioned on the same vertical axis.The transfer route of traction is: the traction cable wire passes to power on the traction bar that is connected with it; The traction bar passes to anti-drop ball with power again, and anti-drop ball and anti-drop ball framework are fitted gradually, and further passes to anti-drop ball framework to power; Because anti-drop ball framework is positioned at the top of car; And be connected with the top of car, so it is traction has finally passed to car, near and drive car and move up and down.Said traction bar, anti-drop ball, anti-drop ball retracing spring and anti-drop ball framework must could guarantee that like this car pulsation-free moves up and down, otherwise car depart from vertical direction, fluctuation of service on same vertical axis.
Preferably, said Locking Device comprises locking rail, locking plate and locking plate retainer.This device cooperates above-mentioned anti-drop ball device, and the two-way interaction falls to prevent the car that the traction cables break causes.
Preferably, said locking plate retainer is arranged at the both sides of anti-drop ball framework, and is connected with the top of car.Elevator is when normal operation, and the locking plate retainer can make locking plate be in the level of approximation state, owing to link to each other with car, under the weight of car, no matter car is up or descending, can guarantee that locking plate is in the level of approximation state.
Preferably; Said locking plate is arranged at the both sides of anti-drop ball; One end of locking plate connects with the below of the corresponding end of anti-drop ball; The other end of locking plate passes the locking plate retainer and the anti-drop ball frame facet of side, and locking plate and anti-drop ball bonded assembly one end are provided with cylinder, has the hole at locking plate away from an end of preventing drop ball.When elevator fell, anti-drop ball descended rapidly down in the effect of himself weight and anti-drop ball retracing spring, and the cylinder on the locking plate can support anti-drop ball, prevented that simultaneously drop ball also oppresses cylinder, and making locking plate is a deflection with the locking plate retainer.
Preferably, said locking rail is arranged at the both sides of car, and passes the hole on the locking plate of both sides.When locking plate deflected, locking rail and locking plate were stuck, and actv. has prevented falling of elevator.
Preferably, hole on the said locking plate and the gap between the locking rail are 10mm.If the gap is too little, elevator is when operation, and hole on the locking plate and locking rail scratch easily; If the gap is too big, when elevator falls, make that the locking plate deflection angle is excessive, locking plate and locking rail can not be in time stuck, and the displacement that car falls is also big, results in greater loss easily, so preferred gap is 10mm.
Preferably, the material of said traction cable wire is a high-carbon steel, and wherein carbon content is 1.1～1.7% (percentage by weights), and its tensile strength is between 1300～1800MPa.One end of traction cable wire directly or indirectly links to each other with car, and the other end links to each other with counterweight, and relies on the friction generates traction between cable wire and the traction sheave grooving, closely drives car and goes up and down to move.The traction cable wire is carrying the summation of the whole suspended weights of elevator such as car, counterweight, nominal payload and cable wire self; And alternating bending; Bear very high specific pressure; Also will frequently bear the impact of elevator starter and braking, therefore, the traction cable wire needs very high intensity, toughness, resistance to abrasion and flexible.High-carbon steel is through after the suitable heat treatment or work hardening, has very high tensile strength and hardness, high stretch ratio and toughness, high elastic limit and fatigue limit.The carbon content of high-carbon steel should be moderate, and carbon content is low excessively, though good toughness, intensity is low; Carbon content is too high, though intensity and hardness are high, and poor toughness, easy crisp, fracture easily, so carbon content is preferably 1.1～1.7% (percentage by weights).
Preferably, the lubricant that is used on the traction cable wire is a colloidal graphite mixed with water, is made up of graphite, compound resin and multiple additives.The car required power of operation of going up and down is fricative through between traction cable wire and the traction sheave grooving, i.e. traction.This just needs between traction cable wire and the traction sheave grooving good friction is arranged, and constituting in addition between steel wire, rope strand and wire rope core and the three of cable wire also will have good lubricity.The colloidal graphite mixed with water of being made up of mentioned component has that friction coefficient is big, strong adhesion, viscosity are big, anticorrosive property and the good characteristics of lubricity, has superior ageing resistance and good antioxygenic property simultaneously.Therefore, use this lubricant not only can reduce in the cable wire operational process between each steel wire, between the rope strand and the wearing and tearing between cable wire and the traction sheave grooving, and can prolong service life of cable wire.But it is an amount of that the use of lubricant is wanted, otherwise the lubricant of adhering on the traction cable wire is too much, and cable wire is skidded in grooving, thereby cause traction to descend, and car is fallen.
The invention still further relates to the elevator that above-mentioned anti-falling mechanism is housed.
Description of drawings
To combine accompanying drawing that specific embodiment of the present invention is described in detail below, wherein:
Fig. 1 is the scheme drawing when being furnished with a preferred embodiment that carries the car elevator according to the anti-falling mechanism of elevator of the present invention and normally moving;
Fig. 2 is the scheme drawing of the fall arrest glancing impact of the embodiment according to of the present invention year car elevator shown in Figure 1;
Fig. 3 is the traction transfer route block diagram of embodiment according to of the present invention year car elevator illustrated in figures 1 and 2.
1 is the locking rail among the figure, and 2 is locking plate, and 3 is the locking plate retainer, and 4 are anti-drop ball framework, and 5 are anti-drop ball, and 6 are anti-drop ball retracing spring, and 7 are the traction cable wire, and 8 are the traction bar, and 9 is vehicle, and 10 is car.
The specific embodiment
Be that example is carried out detailed explanation to carry the car elevator below.
Embodiment one:
As shown in Figure 1, the anti-falling mechanism of year car elevator comprises car 10, traction cable wire 7 and traction bar 8.Traction cable wire 7 and traction bar 8 are positioned at the top of car 10, and traction cable wire 7 is positioned at the top of traction bar 8, and the upper end of traction bar 8 is connected with an end of traction cable wire 7, and the lower end of traction bar 8 is connected with anti-drop ball device.Anti-drop ball device is connected with Locking Device, and two devices all are positioned at the top of car 10.
Anti-drop ball device comprises anti-drop ball 5, anti-drop ball framework 4 and anti-drop ball retracing spring 6.Anti-drop ball framework 4 is arranged at the top of car 10, and is connected with the top of car 10; Anti-drop ball 5 is arranged at the inside of anti-drop ball framework 4, and the upper end of anti-drop ball 5 is parallel with the top of anti-drop ball framework 4, and the lower end of anti-drop ball 5 places on the base of traction bar 8; Anti-drop ball retracing spring 6 is arranged between the top of anti-drop ball 5 and anti-drop ball framework 4.Traction bar 8 passes the top of anti-drop ball 5, anti-drop ball retracing spring 6 and anti-drop ball framework 4 from bottom to up successively, and four are positioned on the same vertical axis.
Locking Device comprises locking rail 1, locking plate 2 and locking plate retainer 3 again.Locking plate retainer 3 is arranged at the both sides of anti-drop ball framework 4, and is connected with the top of car 10; Locking plate 2 is arranged at the both sides of anti-drop ball 5; One end of locking plate 2 connects with the below of anti-drop ball 5 corresponding ends; The other end of locking plate 2 passes the side of the locking plate retainer 3 and the anti-drop ball framework 4 of side; Locking plate 2 is provided with cylinder with anti-drop ball 5 bonded assemblys one end, has the hole at locking plate 2 away from an end of preventing drop ball 5; Locking rail 1 is arranged at the both sides of car 10, and passes the hole on the both sides locking plate 2, and the gap between hole on the locking plate 2 and the locking rail 1 is 10mm.
Traction cable wire 7 is to be made up of steel wire, rope strand and wire rope core.Steel wire is the fundamental strength unit of cable wire, and its material is a high-carbon steel, and carbon content is 1.1% (percentage by weight), has advantages of higher tensile strength, high toughness and high fatigue limit, and its tensile strength is 1300MPa; Rope strand is 6 strands; Wire rope core is a fibre core.
On traction cable wire 7, apply proper amount of lubricating agent, the colloidal graphite mixed with water that it is made up of natural superfine graphite powder, compound resin and multiple additives such as stabilizer, auxiliary agent.
As shown in Figure 1, when year car elevator of vehicle 9 normally moves, traction cable wire 7 pulling traction bars 8.Under the weight of car 10, anti-drop ball 5 is fitted with anti-drop ball framework 4, and anti-simultaneously drop ball retracing spring 6 is compressed, and therefore, traction cable wire 7 can drive car 10 and move up and down.
When car normally moved, locking plate 2 was driven by anti-drop ball 5, and because the existence of locking plate retainer 3 makes locking plate 2 be in the state of level of approximation.Under this state, there is the gap of 10mm between hole on the locking plate 2 and the locking rail 1, prevent that hole and the locking rail 1 on the locking plate 2 from scratching, otherwise can influence the normal operation of car.Under the weight of car 10, no matter car 10 is up or descending, can guarantee that locking plate 2 is in the state of level of approximation.
As shown in Figure 3, the transfer route of traction is: traction cable wire 7 passes to the traction bar 8 that is connected with it with power, and traction bar 8 passes to anti-drop ball 5 with power again; Anti-drop ball 5 is fitted with anti-drop ball framework 4 gradually; And further pass to anti-drop ball framework 4 to power, because anti-drop ball framework 4 is positioned at the top of car 10, and be connected with the top of car 10; So traction has finally passed to car 10, closely drive car 10 and move up and down.
As shown in Figure 2, when fracture took place traction cable wire 7, car 10 dropped; At this moment; Anti-drop ball 5 descends rapidly down in the effect of himself weight and anti-drop ball retracing spring 6, oppresses the cylinder on the locking plate 2, and making locking plate 2 is rotating shaft deflection with locking plate retainer 3; Thereby make locking plate 2 block locking rail 1, prevented falling of car 10.
Embodiment two:
Carry anti-falling mechanism, the fall arrest principle of car elevator and be used for identical with described in the embodiment one of lubricant on the traction cable wire 7.
Traction cable wire 7 is to be made up of steel wire, rope strand and wire rope core.Steel wire is the fundamental strength unit of cable wire, and its material is a high-carbon steel, and carbon content is 1.4% (percentage by weight), has advantages of higher tensile strength, high toughness and high fatigue limit, and its tensile strength is 1550MPa; Rope strand is 8 strands; Wire rope core is a fibre core.
Embodiment three:
Carry anti-falling mechanism, the fall arrest principle of car elevator and be used for identical with described in embodiment one and the embodiment two of lubricant on the traction cable wire 7.
Traction cable wire 7 is to be made up of steel wire, rope strand and wire rope core.Steel wire is the fundamental strength unit of cable wire, and its material is a high-carbon steel, and carbon content is 1.7% (percentage by weight), has advantages of higher tensile strength, high toughness and high fatigue limit, and its tensile strength is 1800MPa; Rope strand is 6 strands; Wire rope core is a fibre core.
Those skilled in the art are understood that; The anti-falling mechanism of elevator of the present invention comprises summary of the invention and specific embodiment part and the combination in any of the shown each several part of accompanying drawing of the specification sheets of the invention described above, though as space is limited and for making specification sheets concisely not have these scenarios that constitutes are described one by one.
Claims (10)
1. the anti-falling mechanism of elevator; Comprise car, traction cable wire and traction bar, said traction cable wire and traction bar are positioned at the top of car, and said traction cable wire is positioned at the top of traction bar; The upper end of traction bar is connected with an end of traction cable wire; It is characterized in that: the lower end of said traction bar is connected with anti-drop ball device, and said anti-drop ball device is connected with Locking Device, and anti-drop ball device and Locking Device are positioned at the top of said car.
2. the anti-falling mechanism of elevator according to claim 1 is characterized in that: said elevator is for carrying a car elevator.
3. the anti-falling mechanism of elevator according to claim 1 and 2 is characterized in that: said anti-drop ball device comprises anti-drop ball, anti-drop ball framework and anti-drop ball retracing spring.
4. the anti-falling mechanism of elevator according to claim 3, it is characterized in that: said anti-drop ball framework is arranged at the top of car, and is connected with the top of car.
5. the anti-falling mechanism of elevator according to claim 3 is characterized in that: said anti-drop ball is arranged at anti-drop ball inside of frame, and the upper end of anti-drop ball is parallel with the top of anti-drop ball framework, prevents that the lower end of drop ball places on the base of traction bar.
6. the anti-falling mechanism of elevator according to claim 3 is characterized in that: said anti-drop ball retracing spring is arranged between the top of anti-drop ball and anti-drop ball framework.
7. according to the anti-falling mechanism of each described elevator in the claim 1～6, it is characterized in that: said traction bar passes the top of anti-drop ball, anti-drop ball retracing spring and anti-drop ball framework from bottom to up successively, and four are positioned on the same vertical axis.
8. the anti-falling mechanism of elevator according to claim 1 and 2, it is characterized in that: said Locking Device comprises locking rail, locking plate and locking plate retainer.
9. the anti-falling mechanism of elevator according to claim 8 is characterized in that: said locking plate retainer is arranged at the both sides of anti-drop ball framework, and is connected with the top of car.
10. the anti-falling mechanism of elevator according to claim 8; It is characterized in that: said locking plate is arranged at the both sides of anti-drop ball; One end of locking plate connects with the below of the corresponding end of anti-drop ball, and the other end of locking plate passes the locking plate retainer and the anti-drop ball frame facet of side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102968808A CN102431865B (en) | 2011-09-30 | 2011-09-30 | Fall prevention mechanism of elevator and elevator equipped with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102968808A CN102431865B (en) | 2011-09-30 | 2011-09-30 | Fall prevention mechanism of elevator and elevator equipped with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102431865A true CN102431865A (en) | 2012-05-02 |
| CN102431865B CN102431865B (en) | 2013-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102968808A Expired - Fee Related CN102431865B (en) | 2011-09-30 | 2011-09-30 | Fall prevention mechanism of elevator and elevator equipped with same |
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| Country | Link |
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| CN (1) | CN102431865B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395546A (en) * | 2016-11-29 | 2017-02-15 | 北京联合大学 | Safe anti-falling device |
| KR101836774B1 (en) | 2017-09-06 | 2018-03-08 | 최광일 | A Subsidiary Emergency Braking Device For Elevators |
| CN107902520A (en) * | 2017-12-19 | 2018-04-13 | 江西亿康云谷自动化设备有限公司 | A kind of vertical lift elevator |
| CN114436090A (en) * | 2022-02-09 | 2022-05-06 | 辽宁石油化工大学 | Anti-falling device for guide rail |
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| SU586070A1 (en) * | 1976-08-03 | 1977-12-30 | Всесоюзный Государственный Проектно-Конструкторский И Технологический Институт "Гипроспецлегконструкция" | Elevator safety device |
| CN2103540U (en) * | 1991-10-16 | 1992-05-06 | 南海县第二建筑工程公司 | Device for prevent falling of elevator |
| CN2169617Y (en) * | 1993-09-02 | 1994-06-22 | 柳州市建筑电梯厂 | Anti-cable broken, load limiting safety device for elevator |
| CN101143671A (en) * | 2006-09-14 | 2008-03-19 | 王卫星 | Lift equipment rapid protecting device |
| JP2010202323A (en) * | 2009-03-03 | 2010-09-16 | Koshihara:Kk | Safety device of lift for construction |
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- 2011-09-30 CN CN2011102968808A patent/CN102431865B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU586070A1 (en) * | 1976-08-03 | 1977-12-30 | Всесоюзный Государственный Проектно-Конструкторский И Технологический Институт "Гипроспецлегконструкция" | Elevator safety device |
| CN2103540U (en) * | 1991-10-16 | 1992-05-06 | 南海县第二建筑工程公司 | Device for prevent falling of elevator |
| CN2169617Y (en) * | 1993-09-02 | 1994-06-22 | 柳州市建筑电梯厂 | Anti-cable broken, load limiting safety device for elevator |
| CN101143671A (en) * | 2006-09-14 | 2008-03-19 | 王卫星 | Lift equipment rapid protecting device |
| JP2010202323A (en) * | 2009-03-03 | 2010-09-16 | Koshihara:Kk | Safety device of lift for construction |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395546A (en) * | 2016-11-29 | 2017-02-15 | 北京联合大学 | Safe anti-falling device |
| CN106395546B (en) * | 2016-11-29 | 2019-01-25 | 北京联合大学 | A kind of safety anti-falling device |
| KR101836774B1 (en) | 2017-09-06 | 2018-03-08 | 최광일 | A Subsidiary Emergency Braking Device For Elevators |
| CN107902520A (en) * | 2017-12-19 | 2018-04-13 | 江西亿康云谷自动化设备有限公司 | A kind of vertical lift elevator |
| CN107902520B (en) * | 2017-12-19 | 2023-04-28 | 江西亿康云谷自动化设备有限公司 | Vertical lift elevator |
| CN114436090A (en) * | 2022-02-09 | 2022-05-06 | 辽宁石油化工大学 | Anti-falling device for guide rail |
| CN114436090B (en) * | 2022-02-09 | 2023-07-18 | 辽宁石油化工大学 | Anti-falling device for guide rail |
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|---|---|
| CN102431865B (en) | 2013-11-13 |
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