CN101844720A - Elevator buffer device, elevator safety overhaul protecting system and method for reducing requirements on well pit of elevator or top building - Google Patents

Elevator buffer device, elevator safety overhaul protecting system and method for reducing requirements on well pit of elevator or top building Download PDF

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Publication number
CN101844720A
CN101844720A CN 201010145306 CN201010145306A CN101844720A CN 101844720 A CN101844720 A CN 101844720A CN 201010145306 CN201010145306 CN 201010145306 CN 201010145306 A CN201010145306 A CN 201010145306A CN 101844720 A CN101844720 A CN 101844720A
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CN
China
Prior art keywords
elevator
energy disperser
buffer
car
arrangement
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Pending
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CN 201010145306
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Chinese (zh)
Inventor
辛全忠
邱礼冕
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IFE Elevators Co Ltd
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IFE Elevators Co Ltd
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Publication date
Application filed by IFE Elevators Co Ltd filed Critical IFE Elevators Co Ltd
Priority to CN 201010145306 priority Critical patent/CN101844720A/en
Publication of CN101844720A publication Critical patent/CN101844720A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the technical field of elevator safety equipment, in particular to an elevator buffer device, a safety overhaul protecting system for a well pit or a lift car top of an elevator and a method for reducing the building depth of a well pit of an elevator or the height of a top building. The safety overhaul protecting system for a well pit comprises a sensor, a safety switch and an elevator bugger device which comprises a buffer and a height adjusting device for controlling the raising and the falling of the buffer. The raising and the falling of the buffer are controlled by the height adjusting device. When the elevator operates normally, the height adjusting device controls the buffer to fall so as to realize smaller building depth of the well pit of the elevator and the smaller height of the top building. When the elevator needs overhaul, the height adjusting device controls the buffer to raise so as to obtain enough safety overhaul space of the well pit of the elevator and the top.

Description

Elevator buffer device, elevator safety maintenance protection system and minimizing thereof are to the method for elevator hoistways pit or top building requirement
Technical field
The present invention relates to the elevator safety devices art, refer in particular to a kind of elevator buffer device, elevator safety maintenance protection system and minimizing thereof method the elevator hoistways building requirements.
Background technology
As everyone knows, normally move for the long-term safety that guarantees elevator, elevator often or regularly need be maintained, and in the process of maintenance, the maintainer will enter unavoidably and carry out operation in the elevator pit or on the car roof.Therefore, the requirement of clearly having stipulated the pit depth and the headroom height of elevator hoistways in " the GB7588 elevator is made and safety standard is installed " is to guarantee the personal safety of service personnel.For reaching this purpose, traditional in the industry way is provided with energy disperser below car and Elevator weight sensor device in pit, and below energy disperser, be provided with water mud pier, thereby realize when car compacting energy disperser, enough safety inspection spaces being arranged at the bottom of the car; When counterweight compacting energy disperser, car roof has enough safety inspection spaces, and then realizes the safety protection function to human body.Yet, the existing shortcoming of water mud pier formula fail-safe structure of this kind tradition is: pit requires dark and top layer is had relatively high expectations, and building cost is higher, especially for some old building transformings and outdoor when installing elevator additional, some existing building height space are limited, bring difficulty for the installation of elevator.
At present; occurred some advanced elevator pit maintenance protection system and methods on the market, for example China Patent No. is 200710027819.7 disclosed a kind of " increasing the method and the elevator pit maintenance examination protection system in elevator pit maintenance safety space ".In the technical scheme of this patent application document; it is to be provided with and the corresponding maintenance protection device of car buffer quantity; each maintenance protection device main body is a cylinder; one end of cylinder has a bearing surface; the other end of cylinder has installation portion; each maintenance protection device is movably installed on the areal of support of car buffer by this installation portion; this maintenance protection device system removedly with the car buffer interlock; be formed with bearing surface in the cylinder upper end; free vertical distance between this bearing surface and the car buffer areal of support is a fixed value; and this fixed value satisfies: when car is pressed on this bearing surface fully, at the bottom of the pit and the free vertical distance between the minimum parts of car be not less than 0.50M.
Yet; though this kind elevator pit maintenance protection system and method can solve the existing problem of water mud pier formula fail-safe structure of aforementioned conventional; play the effect of saving building cost; really has progressive; but when using, reality but finds still to have many deficiencies on himself structure and the in-use performance; fail to reach best result of use and task performance, now its weaknesses analysis be summarized as follows:
One, the use of its maintenance protection device is too loaded down with trivial details, and particularly, when the maintainer entered pit and overhauls, the maintainer need manually pull down the maintenance protection device from limiting bracket, be installed on the areal of support of car buffer by bolt then; After Awaiting Overhaul was finished, the maintainer needed again manually the maintenance protection device to be pulled down from energy disperser, retightens on limiting bracket then.Increase too much work capacity so for maintainer's operation, prolong production time, influence work efficiency, be unfavorable for market competition.
Two, Bao Hu safety is not strong; its maintenance protection device needs the staff to enter in advance in the pit just to work after the manual installation; certainly will there be a potential safety hazard like this; promptly after the staff enters pit in the time that installs fully before the maintenance protection device, the staff is in not guard mode.
Three, fail to provide the solution that reduces the architectural top space, it is limited to reduce building cost.
Summary of the invention
Main purpose of the present invention provides the method for a kind of minimizing to the elevator hoistways pit building degree of depth or top building requirement for height, as the solution of low cost, shallow pit and short top layer high building.
Another object of the present invention provides a kind of elevator pit or car roof safety inspection protection system, and it is easy to use, degree of automation is high, stable work in work and safer reliable.
For achieving the above object, the present invention adopts following technical scheme:
A kind of height-adjustable elevator buffer device comprises that energy disperser and is used to control the arrangement for adjusting height of this energy disperser lifting.
As a kind of preferred version, described arrangement for adjusting height includes energy disperser supporting plate, two travel(l)ing rests and two movable sliders, the upper end of two travel(l)ing rests pivot respectively is supported in the both sides of energy disperser supporting plate, the lower end of two travel(l)ing rests is articulated in respectively on two movable sliders, this two movable slider all is screwed together on the transverse screw, this transverse screw is rotated by motor-driven, two movable sliders are driven with the rotation of transverse screw and are horizontally slipped, and two travel(l)ing rests are being driven folding and impelling energy disperser supporting plate and energy disperser lifting by movable slider.
As a kind of preferred version, further be provided with gliding movement targeting structure at this two movable slider.
As a kind of preferred version, described two travel(l)ing rests are the splayed structure.
A kind of elevator pit safety inspection protection system, include sensor, safety switch and as any described elevator buffer device in the claim 1 to 3, this elevator buffer device be set at car in the elevator pit under, this sensor is arranged in the elevator pit, when sensor senses the someone when entering elevator pit, this safety switch moves and disconnects elevator safety loop, and elevator enters the maintenance pattern; Simultaneously, this arrangement for adjusting height controller buffer rises to the safe altitude of regulation, thereby obtains the required pit depth when car compacting energy disperser of GB7588 regulation.
A kind of method that the elevator hoistways pit building degree of depth is required that reduces, utilize arrangement for adjusting height to control to be positioned at the lifting of the energy disperser under the car, when elevator normally moved, this arrangement for adjusting height controller buffer descended, and made car obtain enough lifting activity spaces; When needs overhauled, this arrangement for adjusting height controller buffer rose to the regulation safe altitude, obtained enough elevator pit safety inspection spaces.
A kind of lift car top safety inspection protection system, include safety switch and as any described elevator buffer device in the claim 1 to 3, this elevator buffer device be set at the Elevator weight sensor device under, and, be provided with the car roof guardrail that can be tilted installation in this car roof, when the people entered tender top, this car roof guardrail was reset, safety switch moves and disconnects elevator safety loop, and elevator enters the maintenance pattern; Simultaneously, this arrangement for adjusting height controller buffer rises to the safe altitude of regulation, thereby obtains the required headroom height when Elevator weight sensor device compacting energy disperser of GB7588 regulation.
A kind of method that reduces elevator hoistways top building requirement for height, utilize arrangement for adjusting height to control to be positioned at the lifting of the energy disperser under the Elevator weight sensor device, when elevator normally moved, this arrangement for adjusting height controller buffer descended, and made car obtain enough lifting activity spaces; When needs overhauled, this arrangement for adjusting height controller buffer rose to the regulation safe altitude, obtained enough safety inspection spaces, lift car top.
The present invention compared with prior art has tangible advantage and beneficial effect, specifically concludes following points:
1), bigger saving building cost, because buffer of elevator has elevating function, therefore when elevator normally moves, this elevator buffer device is in contraction state, when elevator was in inspecting state, this shock absorber raise, thereby obtains enough elevator pits and safety inspection space, sedan-chair top, effectively reduce the requirement of elevator hoistways pit depth and headroom height, and then reached the effect of saving building cost.Be particularly useful for some old building transformings and outdoorly use when installing elevator additional.
2), use more conveniently, the arrangement for adjusting height automatically starting in this elevator buffer device is controlled this energy disperser and is risen, and makes energy disperser bring up to the safe altitude of regulation automatically.By this, the maintainer need not elevator buffer device is carried out any operation, can save maintainer's work capacity greatly, reduces the heavy burdens.
3), stable and reliable working performance, it is to adopt transverse screw to drive slide block to move and carry out height adjustment, utilizes the auto-lock function of slide block on transverse screw to provide support then.This kind structure has splendid supporting role power, can bear the whereabouts impulsive force of car or Elevator weight sensor device fully, and screw-type machinery tradition also is not prone to abnormal problem simultaneously, and has reliable and stable serviceability.
4), safety factor height; be provided with electric and the physical construction double protection functions; when elevator is not opened at bottom end station level position and bottom end station layer door; or the sensor sensing is when having the people to enter pit; automatically start quick arrangement for adjusting height; when treating that the maintainer enters pit, elevator buffer device is prepared in place automatically and is made elevator enter inspecting state.When the sensor sensing has the people to enter car roof or car top guard to be erected, start quick arrangement for adjusting height automatically, when treating that the maintainer enters car roof, elevator buffer device is prepared in place automatically and is made elevator enter inspecting state.
For more clearly setting forth architectural feature of the present invention and effect, the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:
Description of drawings
Fig. 1 is the integral structure diagrammatic sketch of the present invention's embodiment;
Fig. 2 is that diagrammatic sketch is amplified in the part of elevator buffer device among the present invention's the embodiment, and the energy disperser among the figure is in the rising state;
Fig. 3 is another mode of operation diagrammatic sketch of Fig. 2, and the energy disperser among the figure is in the decline state.
The accompanying drawing identifier declaration:
10, elevator hoistways 45, transverse screw
20, car 46, motor
30, Elevator weight sensor device 47, gliding movement targeting structure
40, elevator buffer device 50, sensor
41, energy disperser 60, first safety switch
42, energy disperser supporting plate 70, car roof guardrail
43, travel(l)ing rest 80, second safety switch
44, movable slider
The specific embodiment:
Please refer to Fig. 1 to shown in Figure 3, it has demonstrated the concrete structure of the present invention's preferred embodiment, include the car 20 that is arranged at lifting in the elevator hoistways 10, the other end of car 20 is connected with an Elevator weight sensor device 30, be respectively arranged with two elevator buffer devices 40 in the pit of elevator hoistways 10, and two elevator buffer devices 40 lay respectively at car 20 and Elevator weight sensor device 30 under, utilize this two elevator buffer device 40 to play the effect of damping when falling in that car 20 or Elevator weight sensor device 30 are unexpected, and guarantee that pit and car roof have enough space for maintenances, make personal damage or device damage degree in the accident drop to minimum.
Wherein, this elevator buffer device 40 is to comprise that energy disperser 41 and is used to control the arrangement for adjusting height of these energy disperser 41 liftings.This energy disperser 41 is one can bear the elastic element of greater impact power, in order to Elevator weight sensor device 30 or car 20 bottom surface direct contacts collisions; This arrangement for adjusting height is used for the lifting of controller buffer.
Particularly, arrangement for adjusting height in the present embodiment includes energy disperser supporting plate 42, two travel(l)ing rests 43 and two movable sliders 44, this two travel(l)ing rest 43 is the splayed structure, and the upper end of two travel(l)ing rests 43 pivot respectively is supported in the both sides of energy disperser supporting plate 42, the lower end of two travel(l)ing rests 43 is articulated in respectively on two movable sliders 44, this two movable slider 44 all then is screwed together on the transverse screw 45, this transverse screw 45 is by motor 46 driven in rotation, two movable sliders 44 are driven with the rotation of transverse screw 45 and are horizontally slipped, and two travel(l)ing rests 43 are being driven folding and impelling energy disperser supporting plate 42 and energy disperser 41 liftings by movable slider 44.And, preferably further be provided with gliding movement targeting structure 47 at this two movable slider 44, to guarantee the stability of each parts in course of action of arrangement for adjusting height.Certainly, this arrangement for adjusting height 40 can not only be confined to the structure described in the present embodiment, and it also can adopt other allied equipment or equipment to realize the energy disperser lifting, and can not be as the restriction to spirit of the present invention.
In addition, for the safety control that enters the service personnel in the elevator pit in the elevator maintenance process being provided, being better than most a sensor 50 and one first safety switch 60 are set in the elevator pit.When sensing the someone, sensor 50 enters elevator pit, perhaps apparatus for controlling elevator detects lift car 20 not at bottom end station and one deck door when opening, motor 46 starts, be with transverse screw 45 to rotate, under the position-limiting action of gliding movement targeting structure 47, two movable sliders 44 are being driven to close motor 46 1 sides by transverse screw 45 slide, and energy disperser supporting plate 42 is promoted, thereby drive energy disperser 41 liftings by two travel(l)ing rests 43.Simultaneously, this first safety switch 50 moves and disconnects elevator safety loop, and elevator enters the maintenance pattern, can only carry out inspection operation.Be promoted to the safe altitude of regulation when energy disperser 41, when making the pit space satisfy GB7588 " elevator manufacturing and installation safety standard ", motor shuts down, 44 self-lockings of two movable sliders are fixed, energy disperser 41 is risen rest on required safe altitude position, obtain the safety inspection space of the pit of enough elevator hoistways.
When the sensor 50 induction people that are loaded on pit leave pit and after being loaded on the switch hand reset of layer doorway side, motor 46 starts, driving transverse screw 45 rotates, under the position-limiting action of gliding movement targeting structure 47, two movable sliders 44 are being driven to the direction away from motor 46 by transverse screw 45 to slide, and pass through two travel(l)ing rests 43 with 42 declines of energy disperser supporting plate,, reduces drive energy disperser 41 height of energy disperser 41 thereby moving down.After treating that decline puts in place, first safety switch 50 resets, and elevator changes normal operating condition over to by inspecting state, motor 46 shuts down, 44 self-lockings of two movable sliders are fixed, and make energy disperser 41 rest on required lower position, make car obtain enough lifting activity spaces.
And, for the safety control that enters the service personnel on lift car top in the elevator maintenance process is provided, is better than these car 20 tops most and is provided with the car roof guardrail 70 and second safety switch 80 that can be tilted installation.Under the elevator normal operating condition, car roof guardrail 70 tilts to install, the car roof people space (car roof does not exist its minor face should not be not less than the net area of the station human of 0.12m2 less than 0.25m and the gross area) of can not standing, before the people enters car roof, the car roof that need reset guardrail 70, make 80 actions of second safety switch, elevator safety loop disconnects, and can only carry out inspection operation.Motor in the elevator buffer device 40 46 starts simultaneously, driving transverse screw 45 rotates, under the position-limiting action of gliding movement targeting structure 47, two movable sliders 44 are being driven to sliding near motor 46 1 sides by transverse screw 45, and pass through two travel(l)ing rests 44 with 42 liftings of energy disperser supporting plate, promote thereby drive energy disperser 41.When energy disperser 41 is promoted to the elevator overhead when satisfying GB7588 " elevator manufacturing with install safety standard ", motor 46 shuts down, 44 self-lockings of two movable sliders are fixed, and make energy disperser 41 rest on required higher position, obtain enough safety inspection spaces, lift car top.
When service personnel leaves car roof, the guardrail 70 and second safety switch 80 that are loaded on car roof reset, motor 46 in the elevator buffer device 40 starts, driving transverse screw 45 rotates, under the position-limiting action of gliding movement targeting structure 47, two movable sliders 44 are being driven to the direction away from motor 46 by transverse screw 45 slide, and energy disperser supporting plate 42 is descended, reduce the height of energy disperser 41 thereby drive energy disperser 41 moves down by two travel(l)ing rests 43.After treating that decline puts in place, second safety switch 80 resets, and elevator changes normal operating condition over to by inspecting state, and motor 46 shuts down, and two movable slider self-lockings are fixed, and make energy disperser rest on required lower position, makes car obtain enough lifting activity spaces.
In sum, design focal point of the present invention is, it mainly is the lifting that utilizes an arrangement for adjusting height to control to be positioned at the energy disperser under car or the Elevator weight sensor device, when elevator normally moves, this arrangement for adjusting height controller buffer descends, and makes car obtain enough lifting activity spaces; When needs overhauled, this arrangement for adjusting height controller buffer rose to the regulation safe altitude, obtained enough pits or car roof safety inspection space.
The above, it only is preferred embodiment of the present invention, be not that technical scope of the present invention is imposed any restrictions, so every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any trickle modification, equivalent variations and modification that above embodiment did.

Claims (8)

1. a height-adjustable elevator buffer device is characterized in that: comprise that energy disperser and is used to control the arrangement for adjusting height of this energy disperser lifting.
2. height-adjustable elevator buffer device according to claim 1, it is characterized in that: described arrangement for adjusting height includes the energy disperser supporting plate, two travel(l)ing rests and two movable sliders, the upper end of two travel(l)ing rests pivot respectively is supported in the both sides of energy disperser supporting plate, the lower end of two travel(l)ing rests is articulated in respectively on two movable sliders, this two movable slider all is screwed together on the transverse screw, this transverse screw is rotated by motor-driven, two movable sliders are driven with the rotation of transverse screw and are horizontally slipped, and two travel(l)ing rests are being driven folding and impelling energy disperser supporting plate and energy disperser lifting by movable slider.
3. height-adjustable elevator buffer device according to claim 2 is characterized in that: further be provided with gliding movement targeting structure at this two movable slider.
4. height-adjustable elevator buffer device according to claim 2 is characterized in that: described two travel(l)ing rests are the splayed structure.
5. elevator pit safety inspection protection system, it is characterized in that: include sensor, safety switch and as any described elevator buffer device in the claim 1 to 3, this elevator buffer device be set at car in the elevator pit under, this sensor is arranged in the elevator pit, when sensor senses the someone when entering elevator pit, this safety switch moves and disconnects elevator safety loop, and elevator enters the maintenance pattern; Simultaneously, this arrangement for adjusting height controller buffer rises to the safe altitude of regulation, thereby obtains the required pit depth when car compacting energy disperser of GB7588 regulation.
6. a minimizing is built the method that the degree of depth requires to the elevator hoistways pit, it is characterized in that: utilize arrangement for adjusting height to control to be positioned at the lifting of the energy disperser under the car, when elevator normally moves, this arrangement for adjusting height controller buffer descends, and makes car obtain enough lifting activity spaces; When needs overhauled, this arrangement for adjusting height controller buffer rose to the regulation safe altitude, obtained enough elevator pit safety inspection spaces.
7. lift car top safety inspection protection system, it is characterized in that: include safety switch and as any described elevator buffer device in the claim 1 to 3, this elevator buffer device be set at the Elevator weight sensor device under, and, be provided with the car roof guardrail that can be tilted installation in this car roof, when the people entered tender top, this car roof guardrail was reset, safety switch moves and disconnects elevator safety loop, and elevator enters the maintenance pattern; Simultaneously, this arrangement for adjusting height controller buffer rises to the safe altitude of regulation, thereby obtains the required headroom height when Elevator weight sensor device compacting energy disperser of GB7588 regulation.
8. a minimizing is to the method for elevator hoistways top building requirement for height, it is characterized in that: utilize arrangement for adjusting height to control to be positioned at the lifting of the energy disperser under the Elevator weight sensor device, when elevator normally moves, this arrangement for adjusting height controller buffer descends, and makes car obtain enough lifting activity spaces; When needs overhauled, this arrangement for adjusting height controller buffer rose to the regulation safe altitude, obtained enough safety inspection spaces, lift car top.
CN 201010145306 2010-04-07 2010-04-07 Elevator buffer device, elevator safety overhaul protecting system and method for reducing requirements on well pit of elevator or top building Pending CN101844720A (en)

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CN 201010145306 CN101844720A (en) 2010-04-07 2010-04-07 Elevator buffer device, elevator safety overhaul protecting system and method for reducing requirements on well pit of elevator or top building

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103381985A (en) * 2013-06-26 2013-11-06 杨伦 Device for buffering dropping of elevator
CN105173991A (en) * 2015-08-21 2015-12-23 南通中尧特雷卡电梯产品有限公司 Damping device for elevator car
CN107337061A (en) * 2017-09-04 2017-11-10 朱爱民 A kind of multiple elevator shock-absorbing device
CN108069311A (en) * 2018-01-26 2018-05-25 苏州沃诺斯精密机械有限公司 A kind of anti-crouching bottom device
CN109132745A (en) * 2017-06-27 2019-01-04 上海三菱电梯有限公司 Lift appliance
CN109335909A (en) * 2018-11-16 2019-02-15 立达博仕电梯(苏州)有限公司 A kind of safe elevator shaft pit frame
CN109552957A (en) * 2017-09-25 2019-04-02 奥的斯电梯公司 Lift sensor array system
WO2019218284A1 (en) * 2018-05-16 2019-11-21 南通中尧特雷卡电梯产品有限公司 Damping device for elevator car
CN112027852A (en) * 2020-09-25 2020-12-04 中徽建技术有限公司 Safety device of elevator in wisdom community
CN112839892A (en) * 2018-10-16 2021-05-25 因温特奥股份公司 Buffer device for elevator system

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WO2007089420A1 (en) * 2006-02-01 2007-08-09 Otis Elevator Company Elevator cushioning device
CN101077749A (en) * 2007-04-29 2007-11-28 广州日立电梯有限公司 Method for increasing elvator pit examination and repair safety space and elvator pit maintain check protection system
JP2009154989A (en) * 2007-12-25 2009-07-16 Mitsubishi Electric Building Techno Service Co Ltd Counter clearance adjusting device for elevator
CN201309784Y (en) * 2008-08-11 2009-09-16 西子奥的斯电梯有限公司 Elevator buffer device

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2007089420A1 (en) * 2006-02-01 2007-08-09 Otis Elevator Company Elevator cushioning device
CN101077749A (en) * 2007-04-29 2007-11-28 广州日立电梯有限公司 Method for increasing elvator pit examination and repair safety space and elvator pit maintain check protection system
JP2009154989A (en) * 2007-12-25 2009-07-16 Mitsubishi Electric Building Techno Service Co Ltd Counter clearance adjusting device for elevator
CN201309784Y (en) * 2008-08-11 2009-09-16 西子奥的斯电梯有限公司 Elevator buffer device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103381985B (en) * 2013-06-26 2015-10-28 杨伦 A kind of shock absorber of used during elevator falling
CN103381985A (en) * 2013-06-26 2013-11-06 杨伦 Device for buffering dropping of elevator
CN105173991A (en) * 2015-08-21 2015-12-23 南通中尧特雷卡电梯产品有限公司 Damping device for elevator car
CN109132745A (en) * 2017-06-27 2019-01-04 上海三菱电梯有限公司 Lift appliance
CN109132745B (en) * 2017-06-27 2022-02-18 上海三菱电梯有限公司 Elevator device
CN107337061A (en) * 2017-09-04 2017-11-10 朱爱民 A kind of multiple elevator shock-absorbing device
CN109552957B (en) * 2017-09-25 2021-12-31 奥的斯电梯公司 Elevator sensor array system
CN109552957A (en) * 2017-09-25 2019-04-02 奥的斯电梯公司 Lift sensor array system
US10983210B2 (en) 2017-09-25 2021-04-20 Otis Elevator Company Elevator sensor array system
CN108069311A (en) * 2018-01-26 2018-05-25 苏州沃诺斯精密机械有限公司 A kind of anti-crouching bottom device
WO2019218284A1 (en) * 2018-05-16 2019-11-21 南通中尧特雷卡电梯产品有限公司 Damping device for elevator car
CN112839892A (en) * 2018-10-16 2021-05-25 因温特奥股份公司 Buffer device for elevator system
CN109335909A (en) * 2018-11-16 2019-02-15 立达博仕电梯(苏州)有限公司 A kind of safe elevator shaft pit frame
CN112027852A (en) * 2020-09-25 2020-12-04 中徽建技术有限公司 Safety device of elevator in wisdom community

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Application publication date: 20100929