CN206336871U - Protector and elevator anti-drop system in a kind of elevator - Google Patents
Protector and elevator anti-drop system in a kind of elevator Download PDFInfo
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- CN206336871U CN206336871U CN201720017265.1U CN201720017265U CN206336871U CN 206336871 U CN206336871 U CN 206336871U CN 201720017265 U CN201720017265 U CN 201720017265U CN 206336871 U CN206336871 U CN 206336871U
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- elevator
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- framework
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- overlap joint
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Abstract
Protector and elevator anti-drop system in a kind of elevator that the utility model is provided, wherein, protector includes support flattening mechanism, protection mechanism and anchoring part in elevator；Protection mechanism includes framework and elastic network(s), and elastic network(s) is arranged in framework；Framework includes fixing end and the free end being oppositely arranged, and the fixing end of framework is used to be hinged with the side internal face of elevator, and multiple overlap joint components are provided with the free end of framework；It is fixed on multiple anchoring parts of overlap joint component matching on the offside inwall of elevator, for being overlapped with overlap joint component, to accept protection mechanism.Elevator anti-drop system includes protector at least one above-mentioned elevator, and is arranged on the first inflation mechanism of car top and the second inflation mechanism being arranged under elevator.Once someone falls from elevator, support flattening mechanism, the first inflation mechanism or the second inflation mechanism will work, and to fall, personnel provide buffering, to reduce the probability for occurring life danger.
Description
Technical field
The utility model is related to protector field in elevator, in particular to protector in a kind of elevator
With elevator anti-drop system.
Background technology
In recent years, with real-estate market fast development, high building stands in great numbers in city, and elevator is also widely employed for market
In residential building building.According to statistics, China's elevator recoverable amount, annual production, annual increment, are all in the global umber one.However, elevator
It is complicated electromechanical equipment, repair and maintenance not in time, elevator accident easily occur, and such as car all standing, hall door open car not in this layer,
The problem of falling so as to personnel to elevator, if now no professional rescues and fixed a breakdown, it is possible to accident occur,
Injure the life security of personnel.The generation of these elevator accidents, with the operational procedure such as the detection, maintenance, renewal of equipment not
Specification is relevant, and also whether reliability is relevant with whether setting in elevator protector or the safety device of setting in elevator.
Based on this, the utility model provides in a kind of elevator protector and elevator anti-drop system to solve above-mentioned skill
Art problem.
Utility model content
In view of this, the purpose of the utility model embodiment is that protector and elevator are anti-fall in a kind of elevator of offer
System, once someone falls out of elevator, protector is opened in elevator, so as to reduce the probability for occurring life danger.
The utility model embodiment provides protector in a kind of elevator, including support flattening mechanism, protection mechanism and anchor
Seat；
The protection mechanism includes framework and elastic network(s), and the elastic network(s) is arranged in the framework；The framework includes
The fixing end being oppositely arranged and free end, the fixing end of the framework, which is used to rotate with the side internal face of elevator, to be connected, institute
State and be provided with the free end of framework overlap joint component；
With it is described overlap joint component matching the anchoring part be fixed on the offside inwall of elevator, for the overlap joint group
Part is overlapped, to accept the protection mechanism.
It is preferred that, the utility model embodiment provides protector in a kind of elevator, wherein, on the protection mechanism
The cable trough arranged along framework bearing of trend is provided with, is passed through for elevator cable；The cable trough divides the overlap joint component
To be shifted to install above and below the first clinch and the second clinch, and first clinch and second clinch.
It is preferred that, the utility model embodiment provides protector in a kind of elevator, wherein, first clinch
Include the first reel, control-rod, dead bolt, stage clip, bridge piece and lock with second clinch；
The stage clip and the bridge piece are set in sequence in first reel, and the bridge piece is provided with lock；Institute
The one end for stating dead bolt is provided with control-rod, and the other end is used for and the snap fit；It is described when the dead bolt is with the snap fit
Bridge piece is stretched into first reel, and compresses the stage clip；Two bridge pieces are oppositely arranged, and respectively with the bullet
Property net connection.
It is preferred that, the utility model embodiment provides protector in a kind of elevator, wherein, the fixation of the framework
End is provided with the second reel, spool and wind spring；
The spool is arranged in second reel, and with the centerline parallel of second reel；The wind spring is twined
Around on said reel, and it is connected with elastic network(s).
The utility model embodiment provides a kind of elevator anti-drop system, including the first inflation mechanism, the second inflation mechanism,
And protector in the elevator described at least one；
Protector is uniformly arranged along the depth direction of elevator in multiple elevators；
First inflation mechanism is arranged on the top of car, and second inflation mechanism is arranged on the bottom of elevator.
It is preferred that, the utility model embodiment provides a kind of elevator anti-drop system, wherein, the first inflation mechanism bag
Include the first air bag, the first inflatable article；First inflatable article is used to be first airbag aeration；
Second inflation mechanism includes the second air bag, the second inflatable article；Second inflatable article is used to be described second
Airbag aeration.
It is preferred that, the utility model embodiment provides a kind of elevator anti-drop system, wherein, first air bag is provided with line
Cable hole.
It is preferred that, the utility model embodiment provides a kind of elevator anti-drop system, wherein, also including multiple monitors,
Multiple monitors are uniformly arranged along the depth direction of elevator；
The monitor falls signal for collection；
The monitor and the protection mechanism are connected with the support flattening mechanism；The support flattening mechanism receives the pendant
During falling signal, the protection mechanism is driven to rotate to be horizontality by overhang.
It is preferred that, the utility model embodiment provides a kind of elevator anti-drop system, wherein, also it is laid flat machine including bumper post
Structure；
The bumper post flat mechanism includes bumper post, and the bumper post is uprightly arranged on the bottom of elevator, for
Receive by the monitor close to elevator bottom send fall signal when, drive the bumper post to be rotated to be by erectility
Horizontality.
It is preferred that, the utility model embodiment provides a kind of elevator anti-drop system, wherein, also including controller；
Multiple monitors, the support leveling device, first inflatable article and second inflatable article with the control
Device processed is connected；
The controller, for receiving the signal that falls, to drive the support leveling device, first inflatable article or institute
State the action of the second inflatable article.
Protector and elevator anti-drop system in a kind of elevator that the utility model embodiment is provided, wherein, elevator
Interior protector includes support flattening mechanism, protection mechanism and anchoring part；Protection mechanism includes framework and elastic network(s), and elastic network(s) is arranged on frame
In frame；Framework includes fixing end and the free end being oppositely arranged, and the fixing end of framework is used to cut with scissors with the side internal face of elevator
Connect, overlap joint component is provided with the free end of framework；It is fixed on the anchoring part of overlap joint component matching on the offside inwall of elevator,
For being overlapped with overlap joint component, to accept protection mechanism.Elevator anti-drop system includes protection dress at least one above-mentioned elevator
Put, and be arranged on the first inflation mechanism of car top and the second inflation mechanism being arranged under elevator.Once someone from
Elevator falls, and support flattening mechanism, the first inflation mechanism or the second inflation mechanism will work, and to fall, personnel provide buffering, with
The probability of life danger occurs for reduction.
Brief description of the drawings
, below will be to be used needed for embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 shows the structural representation of protector in a kind of elevator that the utility model embodiment 1 is provided；
Fig. 2 shown in a kind of elevator that the utility model embodiment 1 is provided in protector, the free end of framework
A kind of structure chart；
Fig. 3 is Fig. 2 left view；
Fig. 4 shows the knot for overlapping component in a kind of elevator that the utility model embodiment 1 is provided in protector
Structure schematic diagram；
Fig. 5 shows the knot of the first inflation mechanism in a kind of elevator anti-drop system that the utility model embodiment 2 is provided
Structure schematic diagram；
Fig. 6 shows the knot of the second inflation mechanism in a kind of elevator anti-drop system that the utility model embodiment 2 is provided
Structure schematic diagram.
Digitized representation meaning is as follows in accompanying drawing：
Icon：100- supports flattening mechanism；200- protection mechanisms；210- frameworks；The clinch of 201- first；202- second is overlapped
Portion；The reels of 211- first；212- control-rods；213- dead bolts；214- stage clips；215- is latched；216- bridge pieces；217- volume Twos
Cylinder；218- wind springs；219- spools；220- elastic network(s)s；230- cable troughs；300- anchoring parts；400- elevator cables；500- first is inflated
Mechanism；The air bags of 510- first；The inflatable articles of 520- first；530- cable holes；The inflation mechanisms of 600- second；The air bags of 610- second；
The inflatable articles of 620- second.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment generally here described and illustrated in accompanying drawing can be come with a variety of configurations
Arrangement and design.Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit
Claimed scope of the present utility model, but it is merely representative of selected embodiment of the present utility model.Based on the utility model
Embodiment, the every other embodiment that those skilled in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only
Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or connected using hot plug mode,
Or be integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, intermediary can also be passed through
It is indirectly connected to, can is the connection of two element internals.For the ordinary skill in the art, it can be managed with concrete condition
Solve concrete meaning of the above-mentioned term in the utility model.
In recent years, elevator accident takes place frequently, the operational procedure such as it is with the detection, maintenance, renewal of equipment it is lack of standardization relevant,
Whether reliability is relevant with whether setting in elevator protector or the safety device of setting in elevator anti-drop system road.
Embodiment 1
As shown in figure 1, protector in a kind of elevator that the utility model embodiment 1 is provided, including support flattening mechanism
100th, protection mechanism 200 and anchoring part 300；
Protection mechanism 200 includes framework 210 and elastic network(s) 220, and elastic network(s) 220 is arranged in framework 210；Framework 210 is wrapped
The fixing end being oppositely arranged and free end are included, the fixing end of framework 210, which is used to rotate with the side internal face of elevator, to be connected, frame
Overlap joint component is provided with the free end of frame 210；
It is fixed on the anchoring part 300 of overlap joint component matching on the respective side inwall of elevator, for being overlapped with overlap joint component,
To accept protection mechanism 200.
Elevator includes four internal faces, and one of internal face is provided with elevator door, to prevent protection mechanism 200 and elevator
The dependency structure interference of door, the fixing end of the framework 210 preferably internal face relative with internal face where elevator door is preferably to be hinged
Mode.Wherein, framework 210 can be quadra, and its fixing end is a line of direction framework 210, free end and fixing end pair
Should, it is the another a line parallel with fixing end.It is emphasized that it is that quadra is this that framework 210, which is quadra,
One preferred scheme of embodiment 1, framework can also do corresponding structure design as needed.
Anchoring part 300 is preferably four, is arranged on one of internal face of elevator, preferably interior where elevator door
On wall.When someone falls out of elevator, a lower section of falling protection mechanism 200 support flattening mechanism 100 in the presence of,
Horizontality is rotated to by initial overhang, overlap joint component is overlapped with anchoring part 300, the fixed protection machine in horizontality
Structure 200.The people of accidental falling will fall in elastic network(s) 220, and elastic network(s) 220 serves cushioning effect, prevent from falling personnel by
To hard hit and threat to life.
Further, it is provided with protector in a kind of elevator that the utility model is provided, protection mechanism 200 along frame
The cable trough 230 of the bearing of trend of frame 210 arrangement, passes through for elevator cable 400；Cable trough is divided into the first overlap joint by component is overlapped
Shifted to install above and below portion and the second clinch, and the first clinch and the second clinch, as shown in Figures 2 and 3, Fig. 2 is Fig. 1's
Top view, Fig. 3 is Fig. 1 right view.
The lifting of general car is required for elevator cable 400, and therefore, protector rotates to be horizontality by overhang
It will interfere.Protector is provided with cable trough 230 on protection mechanism 200 in the elevator that the present embodiment 1 is provided, and uses
In passing through for elevator cable 400.There is provided the framework 210 after cable trough 230 is not the framework 210 of a closing, in framework
The overlap joint component of 210 free ends is divided into above and below the first clinch and the second clinch, the first clinch and the second clinch wrong
Position is set.
Further, protector, the first clinch and the second clinch in a kind of elevator that the utility model is provided
Include the first reel 211, control-rod 212, dead bolt 213, stage clip 214, bridge piece 216 and lock 215；
Stage clip 214 and bridge piece 216 are set in sequence in the first reel 211, and bridge piece 216 is provided with lock 215；Dead bolt
213 one end is provided with control-rod 212, and the other end is used to coordinate with lock 215；When dead bolt 213 coordinates with lock 215, bridge piece
216 stretch into the first reel 211, and compression press spring 214；Two bridge pieces 216 are oppositely arranged, and are connected with elastic network(s) 220.
Specifically as shown in figure 4, the first reel 211 is a tubular cavity, stage clip 214 is set in sequence in chamber with bridge piece 216
In vivo.Wherein, stage clip 214 is connected by a stage clip 214 with the first reel 211, bridge piece 216 be a column, its with
One end of spring connection is provided with lock 215, and the other end can stretch out the first reel 211 in the presence of stage clip 214.Dead bolt
213 are arranged on the one end of stage clip 214 away from bridge piece 216, and wherein one end of dead bolt 213 is connected with control-rod 212, the other end
Coordinate with lock 215.When protection mechanism 200 by overhang rotates to be horizontality, the control-rod 212 of the end of framework 210 with
Anchoring part 300 is in contact and locked, and dead bolt 213 is acted in the presence of control-rod 212, by the restrained condition of bridge piece 216
Release, bridge piece 216 in the presence of the stage clip 214 to ejecting outside the first reel 211, and with connected elastic network(s)
220 ejections.Two bridge pieces 216 are towards relative, and the direction ejection staggered up and down, taken elastic network(s) 220 out of, make elastic network(s) into
Overlapping shape up and down, to fill the elastic network(s) of the position of cable trough 230 missing, the personnel that prevent from falling drop out at cable trough 230
Elastic network(s) 220.Add the security reliability of whole protector.
Further, protector in a kind of elevator that the utility model is provided, the fixing end of framework 210 is provided with second
Reel 217, spool 219 and wind spring 218；
Spool 219 is arranged in the second reel 217, and with the centerline parallel of the second reel 217；Wind spring 218 is wrapped in
On spool 219, and it is connected with elastic network(s) 220.Once someone is crashed into net, elastic network(s) 220 is pressurized, the tension of wind spring 218, and releases
Partial elastic net wound on it in advance is released, to increase buffering.
Embodiment 2
A kind of elevator anti-drop system that the utility model embodiment 2 is provided, including the inflation of the first inflation mechanism 500, second
Protector in mechanism 600, and at least one elevator；
Protector is uniformly arranged along the depth direction of elevator in multiple elevators；
First inflation mechanism 500 is arranged on the top of car, and the second inflation mechanism 600 is arranged on the bottom of elevator.
Floor is higher, and the protector set in elevator is more.
Further, as shown in Figure 5 and Figure 6, protector in a kind of elevator that the utility model is provided, the first inflation
Mechanism 500 includes the first air bag 510, the first inflatable article 520；First inflatable article 520 is used to inflate for the first air bag 510；
Second inflation mechanism 600 includes the second air bag 610, the second inflatable article 620；Second inflatable article 620 is used to be second
Air bag 610 is inflated.
The position that people falls in elevator may be different, and position of the car in elevator is also different.When place of falling
In the top of car, and car top is not provided between elevator top after protector in elevator, human body fall
Responsible first air bag 510 provides buffering；When place of falling is in the lower section of car, and below car between elevator bottom
When being not provided with protector in elevator, responsible second air bag 610 provides buffering after human body fall.
Further, protector in a kind of elevator that the utility model is provided, the first air bag 510 is provided with cable hole
530。
In order to avoid interfering with the hole of elevator cable 400, cable hole 530 is also provided with the first air bag 510.
Further, protector in a kind of elevator that the utility model is provided, also including multiple monitors, Duo Gejian
Device is surveyed to be uniformly arranged along the depth direction of elevator；
Monitor falls signal for collection；
Monitor and protection mechanism 200 are connected with support flattening mechanism 100；Support flattening mechanism 100 is received when falling signal, is driven
Dynamic protection mechanism 200 rotates to be horizontality by overhang.
Further, protector in a kind of elevator that the utility model is provided, also including bumper post flat mechanism；
Bumper post flat mechanism includes bumper post, and bumper post is uprightly arranged on the bottom of elevator, for receive by
Close to elevator bottom monitor send fall signal when, driving bumper post horizontality is rotated to be by erectility.
Further, protector in a kind of elevator that the utility model is provided, also including controller；
Multiple monitors, support leveling device, the first inflatable article 520 and the second inflatable article 620 are connected with controller；
Controller, for receiving the signal that falls, to drive support leveling device, the first inflatable article 520 or the second inflatable article 620 dynamic
Make.
Fallen signal specifically, controller is received, and according to signal of change falling speed of falling, so calculate fall into it is every
The very first time needed for individual protection mechanism 200, by when required second is put down in protector support in multiple very first times and elevator
Between contrasted, be more than and during closest to the second time when the very first time, the signal that will fall is sent to corresponding with the very first time
Support flattening mechanism 100；When the signal that falls is sent by the monitor for being arranged on elevator top, the signal that falls, which is sent to, to be stated first and fills
Gas part 520；When the signal that falls is sent by the monitor for being arranged on elevator bottom, the signal that falls, which is sent to, states the second inflatable article
620；
First inflatable article 520, for being inflated when receiving and crashing into signal for the first air bag 510；
Second inflatable article 620, for being inflated when receiving and crashing into signal for the second air bag 610.
More than, embodiment only of the present utility model, but protection domain of the present utility model is not limited thereto,
Any one skilled in the art can readily occur in change or replace in the technical scope that the utility model is disclosed
Change, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with claim
Protection domain is defined.
Claims (10)
1. protector in a kind of elevator, it is characterised in that including support flattening mechanism, protection mechanism and anchoring part；
The protection mechanism includes framework and elastic network(s), and the elastic network(s) is arranged in the framework；The framework includes relative
The fixing end of setting and free end, the fixing end of the framework, which is used to rotate with the side internal face of elevator, to be connected, the frame
Overlap joint component is provided with the free end of frame；
It is fixed on the anchoring part of the overlap joint component matching on the offside inwall of elevator, for being taken with the overlap joint component
Connect, to accept the protection mechanism.
2. protector in a kind of elevator according to claim 1, it is characterised in that be provided with the protection mechanism
The cable trough arranged along framework bearing of trend, passes through for elevator cable；The overlap joint component is divided into first by the cable trough
Shifted to install above and below clinch and the second clinch, and first clinch and second clinch.
3. protector in a kind of elevator according to claim 2, it is characterised in that first clinch with it is described
Second clinch includes the first reel, control-rod, dead bolt, stage clip, bridge piece and lock；
The stage clip and the bridge piece are set in sequence in first reel, and the bridge piece is provided with lock；The lock
One end of tongue is provided with control-rod, and the other end is used for and the snap fit；When the dead bolt is with the snap fit, the overlap joint
Part is stretched into first reel, and compresses the stage clip；Two bridge pieces are oppositely arranged, and respectively with the elastic network(s)
Connection.
4. protector in a kind of elevator according to claim 1, it is characterised in that the fixing end of the framework is provided with
Second reel, spool and wind spring；
The spool is arranged in second reel, and with the centerline parallel of second reel；The wind spring is wrapped in
On the spool, and it is connected with elastic network(s).
5. a kind of elevator anti-drop system, it is characterised in that including the first inflation mechanism, the second inflation mechanism, and at least one
Protector in elevator as described in Claims 1 to 4 any one；
Protector is uniformly arranged along the depth direction of elevator in multiple elevators；
First inflation mechanism is arranged on the top of car, and second inflation mechanism is arranged on the bottom of elevator.
6. a kind of elevator anti-drop system according to claim 5, it is characterised in that
First inflation mechanism includes the first air bag, the first inflatable article；First inflatable article is used to be first air bag
Inflation；
Second inflation mechanism includes the second air bag, the second inflatable article；Second inflatable article is used to be second air bag
Inflation.
7. a kind of elevator anti-drop system according to claim 6, it is characterised in that first air bag is provided with cable hole.
8. a kind of elevator anti-drop system according to claim 7, it is characterised in that also including multiple monitors, Duo Gesuo
Monitor is stated to be uniformly arranged along the depth direction of elevator；
The monitor falls signal for collection；
The monitor and the protection mechanism are connected with the support flattening mechanism；The support flattening mechanism receives the letter that falls
Number when, drive the protection mechanism to rotate to be horizontality by overhang.
9. a kind of elevator anti-drop system according to claim 8, it is characterised in that also including bumper post flat mechanism；
The bumper post flat mechanism includes bumper post, and the bumper post is uprightly arranged on the bottom of elevator, for receiving
To by the monitor close to elevator bottom send fall signal when, drive the bumper post to rotate to be level by erectility
State.
10. a kind of elevator anti-drop system according to claim 9, it is characterised in that also including controller；
Multiple monitors, the support leveling device, first inflatable article and second inflatable article with the controller
It is connected；
The controller, for receiving the signal that falls, to drive the support leveling device, first inflatable article or described the
Two inflatable articles are acted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720017265.1U CN206336871U (en) | 2017-01-06 | 2017-01-06 | Protector and elevator anti-drop system in a kind of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720017265.1U CN206336871U (en) | 2017-01-06 | 2017-01-06 | Protector and elevator anti-drop system in a kind of elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206336871U true CN206336871U (en) | 2017-07-18 |
Family
ID=59305016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720017265.1U Active CN206336871U (en) | 2017-01-06 | 2017-01-06 | Protector and elevator anti-drop system in a kind of elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206336871U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360854A (en) * | 2018-03-01 | 2018-08-03 | 安徽火炎焱文化传媒有限公司 | A kind of stage safety protection device |
| CN108930414A (en) * | 2018-05-28 | 2018-12-04 | 吕军伟 | A kind of horizontal opening protective device for building |
| CN113738138A (en) * | 2021-08-09 | 2021-12-03 | 韩海龙 | Temporary adjustable protection device for construction of building elevator |
-
2017
- 2017-01-06 CN CN201720017265.1U patent/CN206336871U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360854A (en) * | 2018-03-01 | 2018-08-03 | 安徽火炎焱文化传媒有限公司 | A kind of stage safety protection device |
| CN108930414A (en) * | 2018-05-28 | 2018-12-04 | 吕军伟 | A kind of horizontal opening protective device for building |
| CN113738138A (en) * | 2021-08-09 | 2021-12-03 | 韩海龙 | Temporary adjustable protection device for construction of building elevator |
| CN113738138B (en) * | 2021-08-09 | 2022-12-09 | 广东信城建设集团有限公司 | Temporary adjustable protection device for construction of building elevator |
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