CN106219369A - Elevator protection network - Google Patents
Elevator protection network Download PDFInfo
- Publication number
- CN106219369A CN106219369A CN201610850260.7A CN201610850260A CN106219369A CN 106219369 A CN106219369 A CN 106219369A CN 201610850260 A CN201610850260 A CN 201610850260A CN 106219369 A CN106219369 A CN 106219369A
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- net
- protective net
- elevator
- current
- collecting mechanism
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- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 230000001681 protective effect Effects 0.000 claims description 122
- 238000000034 method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 7
- 230000006378 damage Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
- B66B13/245—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers mechanical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Elevator Door Apparatuses (AREA)
Abstract
The invention discloses a kind of elevator protection network, including the lifting rope being fixedly installed in elevator hoistways, the two ends of lifting rope connect attic plate and the ground floor plate at elevator hoistways two ends respectively, described protection network is spaced in being arranged on described lifting rope, by arranging the lifting rope independent of car in elevator hoistways, load-bearing is provided on floor, does not affect the bearing capacity of lift car；Further, each protection network still further comprises left side protection network and right side protection network, is respectively equipped with net collecting mechanism, is respectively equipped with net collecting mechanism on the right side of this above and below protection network, and this net collecting mechanism is arranged on car on the left of this above and below protection network；When elevator runs the elevator hall's mouth to correspondence, left side protection network and right web can receive to open described elevator hall mouth the most to the left and to the right, and when hoistway door lost efficacy, the protection network that corresponding elevator hall mouth trails can stop people to enter hoistway, prevent people from falling in hoistway, it is ensured that personal safety.
Description
Technical Field
The invention relates to an elevator protection net.
Background
An elevator is a vertical elevator powered by an electric motor and equipped with a cage for carrying people or goods in a multi-story building. The elevator is used as a tool for riding instead of walk for high-rise buildings, great convenience is brought to the life of people, but meanwhile, great risks are also hidden when the elevator is taken, and the life safety of people is threatened by the occurrence of accidents. The elevator is composed of a plurality of unsafe factors, the falling accident of the hoistway with the greatest harm directly causes personal casualties, most of the reasons are that the elevator door mechanism fails or the elevator car is not on the floor due to artificial illegal operation, the elevator door is accidentally opened, passengers or workers fall into the hoistway due to the defect of the falling of the elevator door, personal injury accidents are caused, most of the elevators adopt mechanical anti-falling protection devices at present, but the mechanical protection devices are low in safety coefficient and need frequent manual maintenance, and not only are troubles brought to use, but also resources are wasted.
Disclosure of Invention
The invention aims to solve the problems and provides an elevator protection net, wherein a lifting rope independent of a car is arranged in an elevator shaft, a left side protection net and a right side protection net are arranged on the lifting rope at intervals, when an elevator runs to a corresponding elevator shaft opening, the left side protection net and the right side protection net can be respectively stored leftwards and rightwards to open the elevator shaft opening, and when the elevator shaft door fails, the protection net stretched corresponding to the elevator shaft opening can prevent people from entering the shaft, prevent people from falling into the shaft, and ensure the personal safety.
In order to achieve the purpose, the invention adopts the technical scheme that:
an elevator protection net comprises lifting ropes fixedly arranged in an elevator shaft, wherein two ends of each lifting rope are respectively connected with a top floor and a bottom floor at two ends of the elevator shaft, the protection nets are arranged on the lifting ropes at intervals, and each protection net corresponds to the position of each elevator shaft opening; wherein,
when the lift car ascends to the current elevator hall entrance, the net collecting mechanism above the left protective net and the net collecting mechanism above the right protective net respectively collect the left protective net and the right protective net of the current elevator hall entrance leftwards so as to open the current elevator hall entrance;
when the car continues to rise and leaves the current elevator hall entrance, the net collecting mechanism above the left protective net and the net collecting mechanism above the right protective net respectively release and expand the left protective net and the right protective net of the current elevator hall entrance to the middle so as to cover the current elevator hall entrance;
when the car descends to the current elevator hall entrance, the net collecting mechanism below the left protective net and the net collecting mechanism below the right protective net respectively collect the left protective net and the right protective net of the current elevator hall entrance leftwards and rightwards so as to open the current elevator hall entrance;
when the car continuously descends and leaves the current elevator hall entrance, the net collecting mechanism below the left protective net and the net collecting mechanism below the right protective net respectively release and unfold the left protective net and the right protective net of the current elevator hall entrance towards the middle so as to cover the current elevator hall entrance.
Preferably, four lifting ropes are arranged, the left side and the middle side of the left protective net are respectively provided with one lifting rope, and the right side and the middle side of the right protective net are respectively provided with one lifting rope.
Preferably, the left side protective net and the right side protective net are overlapped with each other in a crossing manner, and the overlapping width is between 5cm and 15 cm.
Preferably, the top floor slab and the bottom floor slab are respectively and fixedly provided with a lifting ring, and two ends of the lifting rope are respectively connected with the lifting ring on the top floor slab and the lifting ring on the bottom floor slab.
Preferably, the net collecting mechanism comprises a collecting wheel, a collecting groove for winding a lifting rope is formed in the middle of the collecting wheel, collecting teeth are arranged on the periphery of the collecting wheel, when the car ascends or descends to the current hoistway entrance, the collecting teeth are inserted into grid holes of the left side protective net or the right side protective net, so that the left side protective net of the current hoistway entrance is collected leftwards and the right side protective net is collected rightwards in the rotating process of the collecting wheel along with the movement of the car, and when the car leaves the current hoistway entrance, the grid holes of the left side protective net or the right side protective net are separated from the collecting teeth and released and unfolded towards the middle to cover the current hoistway entrance.
Preferably, the net collecting mechanism further comprises a tensioning wheel, the containing wheel is arranged in the middle of the elevator hall opening, the tensioning wheels above and below the left side protective net are respectively arranged on the left side above and below the elevator hall opening, and the tensioning wheels above and below the right side protective net are respectively arranged on the right side above and below the elevator hall opening.
Preferably, a tensioning wheel positioning seat for fixing the tensioning wheel and a storage wheel positioning seat for fixing the storage wheel are respectively arranged at the corresponding position of the car.
Preferably, the net collecting mechanism of the left protective net and the net collecting mechanism of the right protective net are arranged in a staggered mode in the front-back direction, and the staggered distance is larger than the thickness of the protective net or the lifting rope.
The invention has the beneficial effects that:
(1) according to the elevator protection net, the left protection net and the right protection net are arranged on the lifting ropes at intervals, when an elevator runs to a corresponding elevator hall entrance, the left protection net and the right protection net can be respectively stored leftwards and rightwards to open the elevator hall entrance, and when the elevator hall entrance fails, the protection net stretched out of the corresponding elevator hall entrance can prevent people from entering a hoistway, so that people are prevented from falling into the hoistway, and personal safety is guaranteed;
(2) the protective nets are arranged at intervals, so that if one protective net is damaged, the continuous use of other protective nets is not influenced, the maintenance is more convenient, the resources are effectively saved, and the cost input is reduced;
(3) the lifting rope independent of the elevator car is arranged in the elevator shaft, then the protective net is arranged on the lifting rope and is not shared with the steel wire rope of the elevator car, so that the bearing is arranged on the floor, and the bearing capacity of the elevator car is not influenced;
(4) four lifting ropes are arranged, so that the anti-collision and anti-collision capacity is high;
(5) each hoistway entrance is provided with a left protective net and a right protective net, the protective nets are stored or unfolded on the left side and the right side, and compared with a mode that the protective nets are stored or unfolded up and down on the whole, the area of the protective nets can be saved by half.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a first schematic view of an installation structure of an elevator protection net according to the present invention (the protection net is not shown);
fig. 2 is a schematic view of an installation structure of an elevator protection net of the invention (a left protection net + a right protection net, in an unfolded state);
fig. 3 is a schematic view showing an installation structure of an elevator protection net of the invention in a third (left protection net, unfolded state);
fig. 4 is a schematic view of an installation structure of an elevator protection net according to the present invention (right protection net, unfolded state);
fig. 5 is a schematic view of an installation structure of an elevator protection net according to a fifth embodiment of the present invention (left protection net, storage state);
fig. 6 is a schematic view showing an installation structure of an elevator protection net according to a sixth embodiment of the present invention (a left protection net + a right protection net, in a storage state);
fig. 7 is a schematic view (side view) of an installation structure of an elevator protection net according to the present invention;
fig. 8 is a first structural schematic diagram of a storage wheel of an elevator protection net according to the invention;
fig. 9 is a second schematic structural view of a storage wheel of an elevator protection net according to the present invention.
In the figure:
10-top floor slab; 20-bottom floor slab; 30-a lifting rope; 31-a lifting ring;
40-left protective net; 50-right side protective net;
60-elevator hall entrance; 70-a tension wheel; 80-a storage wheel; 81-receiving teeth; 82-a receiving groove;
90-a car; 91-a tension pulley positioning seat; 92-receiving the wheel positioning seat.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 9, the elevator protection net according to the present invention includes a lifting rope 30 fixedly installed in an elevator shaft, wherein both ends of the lifting rope 30 are respectively connected to a top floor 10 and a bottom floor 20 at both ends of the elevator shaft, the protection nets 40 and 50 are installed on the lifting rope 30 at intervals, and each protection net corresponds to a position of each hoistway entrance 60. Preferably, the top floor 10 and the bottom floor 20 are respectively and fixedly provided with a hanging ring 31, and two ends of the hanging rope 30 are respectively connected with the hanging ring 31 on the top floor 10 and the hanging ring 31 on the bottom floor 20. Alternatively, the lifting rope 30 may be fixedly fastened to the top floor 10 and the bottom floor 20 by other fastening methods.
In this embodiment, four lifting ropes 30 are provided, each protection network further includes a left protection network 40 and a right protection network 50, a lifting rope 30 is provided on each of the left side and the middle side of the left protection network 40, and a lifting rope 30 is provided on each of the right side and the middle side of the right protection network 50. Preferably, the left protective net 40 and the right protective net 50 are overlapped with each other in a crossing manner, and the overlapping width is between 5cm and 15 cm.
Mesh collecting mechanisms are provided above and below the left side protection mesh 40, and mesh collecting mechanisms are provided above and below the right side protection mesh 50, respectively, and are provided on the car 90. In this embodiment, the net collecting mechanism includes a storage wheel 80 and a tension wheel 70, a storage groove 82 for winding the lifting rope 30 is formed in the middle of the storage wheel 80, and a storage tooth 81 is formed at the periphery of the storage wheel 80, when the car 90 ascends or descends to the current hoistway entrance 60, the storage tooth 81 is inserted into the mesh hole of the left protective net 40 or the right protective net 50, so that the left protective net 40 of the current hoistway entrance 60 is stored leftwards and the right protective net 50 is stored rightwards when the storage wheel 80 rotates along with the movement of the car 90, and when the car 90 leaves the current hoistway entrance 60, the mesh hole of the left protective net 40 or the right protective net 50 is separated from the storage tooth 81 and is released and unfolded towards the middle to cover the current hoistway entrance 60. The storage pulley 80 is disposed in the middle of the hoistway entrance 60, the tensioning pulleys 70 above and below the left side protection net 40 are disposed on the left side above and below the hoistway entrance 60, respectively, and the tensioning pulleys 70 above and below the right side protection net 50 are disposed on the right side above and below the hoistway entrance 60, respectively. A tension pulley positioning seat 91 for fixing the tension pulley 70 and a storage wheel positioning seat for fixing the storage wheel 80 are provided at positions corresponding to the car 90. Preferably, the net retracting mechanism of the left protective net 40 and the net retracting mechanism of the right protective net 50 are arranged in a staggered manner, and the staggered distance is greater than the thickness of the protective net or the lifting rope.
Preferably, the whole length of the left protective net 40 and the right protective net 50 after being overlapped and unfolded is greater than or equal to the length of the hoistway entrance 60, and the whole width is greater than or equal to the width of the hoistway entrance 60, so that the protective nets can be positioned right in front of the corresponding hoistway entrance 60 when being stretched and completely cover the right in front of the hoistway entrance 60, and when the hoistway doors fail, people can be effectively prevented from entering the hoistway, and the safety is higher.
In this embodiment, there are 4 groups of network collecting mechanisms: a net collecting mechanism above the left protection net 40, a net collecting mechanism below the left protection net 40, a net collecting mechanism above the right protection net 50, and a net collecting mechanism below the right protection net 50.
The working principle of the elevator protection net of the invention is briefly described as follows:
when the car 90 ascends to the current hoistway entrance 60, the receiving teeth 81 of the receiving wheels 80 of the corresponding receiving mechanisms are inserted into the meshes of the left protective net 40 or the right protective net 50 and perform receiving operation along with the movement of the car 90, so that the receiving mechanisms above the left protective net 40 and the receiving mechanisms above the right protective net 50 respectively receive the left protective net 40 and the right protective net 50 of the current hoistway entrance 60 leftwards to open the current hoistway entrance, and the left protective net 40 and the right protective net 50 corresponding to the rest of the hoistway entrance 60 are kept in an unfolded state;
when the car 90 continues to ascend and leave the current hoistway entrance 60, the mesh holes of the left side protective mesh 40 or the right side protective mesh 50 are respectively disengaged from the receiving teeth 81 of each mesh receiving mechanism and are released and expanded towards the middle, so that the mesh receiving mechanism above the left side protective mesh 40 and the mesh receiving mechanism above the right side protective mesh 50 respectively release and expand the left side protective mesh 40 and the right side protective mesh 50 of the current hoistway entrance 60 towards the middle to cover the current hoistway entrance 60, and the left side protective mesh 40 and the right side protective mesh 50 corresponding to the hoistway entrance 60 of the previous floor are received towards the left and right, and the left side protective mesh 40 and the right side protective mesh 50 corresponding to the remaining hoistway entrance 60 are kept in the expanded state;
when the car 90 descends to the current hoistway entrance 60, the receiving teeth 81 of the receiving wheels 80 of the corresponding receiving mechanisms are inserted into the meshes of the left protective net 40 or the right protective net 50 and perform receiving operation along with the movement of the car 90, so that the receiving mechanisms below the left protective net 40 and the receiving mechanisms below the right protective net 50 respectively receive the left protective net 40 and the right protective net 50 of the current hoistway entrance 60 to the left and the right, so as to open the current hoistway entrance 60, and the left protective net 40 and the right protective net 50 corresponding to the rest of the hoistway entrance 60 are kept in an unfolded state;
when the car 90 continues to descend and leave the current hoistway entrance 60, the mesh holes of the left side protective mesh 40 or the right side protective mesh 50 are respectively disengaged from the receiving teeth 81 of each mesh receiving mechanism and are released and expanded towards the middle, so that the mesh receiving mechanism below the left side protective mesh 40 and the mesh receiving mechanism below the right side protective mesh 50 respectively release and expand the left side protective mesh 40 and the right side protective mesh 50 of the current hoistway entrance 60 towards the middle to cover the current hoistway entrance 60, and the left side protective mesh 40 and the right side protective mesh 50 corresponding to the hoistway entrance 60 of the next floor are received towards the left and right, and the left side protective mesh 40 and the right side protective mesh 50 corresponding to the remaining hoistway entrance 60 are kept in the expanded state.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An elevator protection net which is characterized in that: the elevator protection net comprises a lifting rope fixedly arranged in an elevator shaft, wherein two ends of the lifting rope are respectively connected with a top floor and a bottom floor at two ends of the elevator shaft, protection nets are arranged on the lifting rope at intervals, and each protection net corresponds to the position of each elevator shaft opening; wherein,
when the lift car ascends to the current elevator hall entrance, the net collecting mechanism above the left protective net and the net collecting mechanism above the right protective net respectively collect the left protective net and the right protective net of the current elevator hall entrance leftwards so as to open the current elevator hall entrance;
when the car continues to rise and leaves the current elevator hall entrance, the net collecting mechanism above the left protective net and the net collecting mechanism above the right protective net respectively release and expand the left protective net and the right protective net of the current elevator hall entrance to the middle so as to cover the current elevator hall entrance;
when the car descends to the current elevator hall entrance, the net collecting mechanism below the left protective net and the net collecting mechanism below the right protective net respectively collect the left protective net and the right protective net of the current elevator hall entrance leftwards and rightwards so as to open the current elevator hall entrance;
when the car continuously descends and leaves the current elevator hall entrance, the net collecting mechanism below the left protective net and the net collecting mechanism below the right protective net respectively release and unfold the left protective net and the right protective net of the current elevator hall entrance towards the middle so as to cover the current elevator hall entrance.
2. An elevator protection net according to claim 1, characterized in that: the lifting rope is four, the left side and the middle side of the left side protection net are respectively provided with a lifting rope, and the right side and the middle side of the right side protection net are respectively provided with a lifting rope.
3. An elevator protection net according to claim 1, characterized in that: the left side protective net and the right side protective net are mutually crossed and overlapped, and the overlapping width is between 5cm and 15 cm.
4. An elevator protection net according to claim 1, characterized in that: the top floor and the bottom floor are respectively and fixedly provided with a lifting ring, and two ends of the lifting rope are respectively connected with the lifting ring on the top floor and the lifting ring on the bottom floor.
5. An elevator protection net according to any one of claims 1 to 4, characterized in that: the net collecting mechanism comprises a collecting wheel, a collecting groove used for winding a lifting rope is formed in the middle of the collecting wheel, collecting teeth are arranged on the periphery of the collecting wheel, when the lift car ascends or descends to the current lift hall entrance, the collecting teeth are inserted into grid holes of the left side protective net or the right side protective net, so that the left side protective net of the current lift hall entrance is collected leftwards and the right side protective net is collected rightwards in the rotating process of the collecting wheel along with the movement of the lift car, and when the lift car leaves the current lift hall entrance, the grid holes of the left side protective net or the right side protective net are separated from the collecting teeth and are released and unfolded towards the middle to cover the current lift hall entrance.
6. An elevator protection net according to claim 5, characterized in that: the net collecting mechanism further comprises tension pulleys, the storage pulleys are arranged in the middle of the elevator hall opening, the tension pulleys above and below the left side protective net are arranged on the left side above and below the elevator hall opening respectively, and the tension pulleys above and below the right side protective net are arranged on the right side above and below the elevator hall opening respectively.
7. An elevator protection net according to claim 6, characterized in that: the car corresponds the position and is equipped with respectively and is used for fixing the take-up pulley positioning seat of take-up pulley and is used for fixing take-up pulley's accomodate a wheel positioning seat.
8. An elevator protection net according to any one of claims 1 to 4, characterized in that: the net collecting mechanism of the left side protective net and the net collecting mechanism of the right side protective net are arranged in a staggered mode from front to back, and the staggered distance is larger than the thickness of the protective net or the lifting rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610850260.7A CN106219369B (en) | 2016-09-26 | 2016-09-26 | Elevator protection network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610850260.7A CN106219369B (en) | 2016-09-26 | 2016-09-26 | Elevator protection network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106219369A true CN106219369A (en) | 2016-12-14 |
| CN106219369B CN106219369B (en) | 2018-05-18 |
Family
ID=58076132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610850260.7A Expired - Fee Related CN106219369B (en) | 2016-09-26 | 2016-09-26 | Elevator protection network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106219369B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904506A (en) * | 2017-04-13 | 2017-06-30 | 安如磐（厦门）科技有限公司 | Single net formula elevator safeguard structure |
| CN107055244A (en) * | 2017-05-15 | 2017-08-18 | 安如磐（厦门）科技有限公司 | A kind of elevator protection network and its antiwind receipts web frame |
| CN113942909A (en) * | 2021-11-05 | 2022-01-18 | 中建八局天津建设工程有限公司 | Protective device for elevator shaft and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05246668A (en) * | 1992-03-10 | 1993-09-24 | Nissei Build Kogyo Co Ltd | Safety net device for elevator |
| JPH0977423A (en) * | 1995-09-20 | 1997-03-25 | Taisei Corp | Elevator shaft fall prevention device |
| CN103058035A (en) * | 2012-12-25 | 2013-04-24 | 王宝根 | Elevator anti-falling safety net |
| CN104118780A (en) * | 2013-04-24 | 2014-10-29 | 贺杰 | Lift shaft anti-falling method and device |
| CN206088700U (en) * | 2016-09-26 | 2017-04-12 | 毛小明 | Elevator protection network |
-
2016
- 2016-09-26 CN CN201610850260.7A patent/CN106219369B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05246668A (en) * | 1992-03-10 | 1993-09-24 | Nissei Build Kogyo Co Ltd | Safety net device for elevator |
| JPH0977423A (en) * | 1995-09-20 | 1997-03-25 | Taisei Corp | Elevator shaft fall prevention device |
| CN103058035A (en) * | 2012-12-25 | 2013-04-24 | 王宝根 | Elevator anti-falling safety net |
| CN104118780A (en) * | 2013-04-24 | 2014-10-29 | 贺杰 | Lift shaft anti-falling method and device |
| CN206088700U (en) * | 2016-09-26 | 2017-04-12 | 毛小明 | Elevator protection network |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904506A (en) * | 2017-04-13 | 2017-06-30 | 安如磐（厦门）科技有限公司 | Single net formula elevator safeguard structure |
| CN107055244A (en) * | 2017-05-15 | 2017-08-18 | 安如磐（厦门）科技有限公司 | A kind of elevator protection network and its antiwind receipts web frame |
| CN113942909A (en) * | 2021-11-05 | 2022-01-18 | 中建八局天津建设工程有限公司 | Protective device for elevator shaft and using method thereof |
| CN113942909B (en) * | 2021-11-05 | 2023-05-09 | 中建八局天津建设工程有限公司 | Protective device for elevator shaft and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106219369B (en) | 2018-05-18 |
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Effective date of registration: 20180116 Address after: Ban Wei Road Xiamen City, Fujian province 361010 Siming District No. 17 room 404 Applicant after: As ANN (Xiamen) Technology Co. Ltd. Address before: The new house in 334713 in Jiangxi province Shangrao City Xianyan town Yushan county Huang Mao Wu Haruki No. 43 Applicant before: Mao Xiaoming |
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