CN111576900A - Safety protection device for building construction - Google Patents
Safety protection device for building construction Download PDFInfo
- Publication number
- CN111576900A CN111576900A CN202010328820.9A CN202010328820A CN111576900A CN 111576900 A CN111576900 A CN 111576900A CN 202010328820 A CN202010328820 A CN 202010328820A CN 111576900 A CN111576900 A CN 111576900A
- Authority
- CN
- China
- Prior art keywords
- protective net
- plate
- mounting frame
- construction
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
- E04G21/3223—Means supported by building floors or flat roofs, e.g. safety railings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention belongs to the technical field of building construction, and particularly relates to a safety protection device for building construction, which comprises an installation frame, wherein a protective net is slidably installed inside the installation frame, limiting grooves are formed in the inner walls of the top and the bottom of the installation frame, limiting blocks are fixedly connected to the upper end and the lower end of the protective net, the two limiting blocks are respectively slidably installed inside the two limiting grooves, openings are formed in the right side ends of the two limiting grooves, and a pulling plate is fixedly connected to the outer wall of the right side of the protective net; according to the invention, the protective net capable of being pulled outwards is arranged in the mounting frame, so that an inlet for workers to enter and exit can be formed between the protective net and the mounting frame by pulling the protective net outwards during construction, the operation is simple, the workers can conveniently enter the well for construction, the distance for the protective net to move outwards can be controlled by the workers during use to control the size of the inlet, the entering and exiting requirements of different workers can be met, and the applicability is improved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a safety protection device for building construction.
Background
The building construction refers to production activities in the engineering construction implementation stage, is the construction process of various buildings, and comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like, the construction operation place is called as a building construction site or construction site, also called as a construction site, an elevator is installed in the existing building, and a protective guard is installed outside a wellhead of the elevator in the construction process to ensure the construction safety.
The structure of present rail guard is fixed, generally through the bolt snap-on the outer wall of well head, and when constructor need enter into the well construction, need get off the whole back of rail guard and just can enter into the well head inside, the operation is comparatively hard, and when entering the interior construction of well head, the workman does not have the foothold, need use the lifting rope to fall and construct in the midair, and danger is higher.
Accordingly, one skilled in the art has devised a safety shield apparatus for use in building construction to address the problems outlined above.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a safety protection device for building construction, which has the characteristics of high safety and convenience for workers to enter a well for construction.
In order to achieve the purpose, the invention provides the following technical scheme: a safety protection device for building construction comprises an installation frame, wherein a protective net is slidably installed inside the installation frame, limiting grooves are formed in the inner walls of the top and the bottom of the installation frame, limiting blocks are fixedly connected to the upper end and the lower end of the protective net respectively, the two limiting blocks are slidably installed inside the two limiting grooves respectively, openings are formed in the right side ends of the two limiting grooves, a pulling plate is fixedly connected to the outer wall of the right side of the protective net and located outside the installation frame, a bolt is connected to the bottom end of the inside of the protective net in a threaded mode and penetrates through the protective net to be fixedly screwed inside the installation frame; the mounting frame right side wall bottom fixedly connected with layer board, the inside slidable mounting of layer board has the movable plate, movable plate right side end extends to the layer board is outside, the inside threaded connection in layer board top has two screws that are the symmetric distribution, the screw with the layer board the movable plate spiro union is fixed.
As a still further scheme of the invention: the mounting cavity is formed in the supporting plate, the moving plate is slidably mounted in the mounting cavity, and an opening is formed in the right side end of the mounting cavity.
As a still further scheme of the invention: screw holes are formed in the top and the bottom of the installation cavity, and the screw rod is connected to the position above the screw holes in a threaded mode.
As a still further scheme of the invention: two through holes which are symmetrically distributed are formed in the movable plate, the screw rod penetrates through the screw hole and the through holes above the screw rod, and the screw rod is fixed inside the screw hole below the screw rod in a threaded mode.
As a still further scheme of the invention: the bottom of the right side wall of the mounting frame is provided with a positioning hole, and the bolt is fixed inside the positioning hole in a threaded manner.
As a still further scheme of the invention: the outer wall of the right side end of the moving plate is fixedly connected with a side plate, and the top of the side plate is located above the top of the moving plate.
Compared with the prior art, the invention has the beneficial effects that:
the protective net capable of being pulled outwards is arranged in the mounting frame, an inlet for workers to enter and exit can be formed between the protective net and the mounting frame by pulling the protective net outwards during construction, the operation is simple, the workers can conveniently enter a well for construction, the workers can automatically control the distance of outward movement of the protective net during use to control the size of the inlet, the inlet and outlet requirements of different workers can be met, the applicability is improved, the mounting frame is also provided with the supporting plate with the moving plate inside, the supporting plate is positioned in the well, the workers can directly stand on the supporting plate after entering the well, the supporting plate can become a foot drop point of the workers, the workers can conveniently carry out well construction, the safety is high, the moving plate can move outwards in the supporting plate, the moving plate is fixed through the screw after moving outwards, the firmness of the moving plate after the position is adjusted is improved, and the overall length of the supporting plate and the moving plate can be increased, the standing range of workers is increased, construction can be performed on the far position, and the working efficiency is improved.
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 principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic top view of the present invention;
fig. 4 is an enlarged schematic view of a portion a in fig. 2.
In the figure: 1. installing a frame; 11. a limiting groove; 12. positioning holes; 2. a protective net; 21. a limiting block; 22. pulling a plate; 221. a bolt; 3. a support plate; 31. a mounting cavity; 311. a screw hole; 4. moving the plate; 41. a through hole; 42. a side plate; 5. a screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a safety device for construction, including installing frame 1, the inside slidable mounting of installing frame 1 has protection network 2, spacing groove 11 has all been seted up to installing frame 1 top and bottom inner wall, the equal fixedly connected with stopper 21 in both ends about protection network 2, two stopper 21 respectively slidable mounting are inside two spacing groove 11, two spacing groove 11 right side ends all have the opening, protection network 2 right side outer wall fixedly connected with arm-tie 22, arm-tie 22 is located the installing frame 1 outside, the inside bottom threaded connection of protection network 2 has bolt 221, bolt 221 runs through protection network 2 spiro union to be fixed inside installing frame 1, fixedly connected with layer board 3 in installing frame 1 right side wall bottom, the inside slidable mounting of layer board 3 has movable plate 4, movable plate 4 end extends to the layer board 3 outside, the inside threaded connection in layer board 3 top has two screws 5 that are symmetric distribution, screw 5 and layer board 3 right side, The moving plate 4 is screwed and fixed.
In this embodiment: the four corners of the outer side wall of the mounting frame 1 are provided with mounting blocks, the mounting frame 1 can be fixed on the wall surface outside a wellhead through expansion screws and the mounting blocks, the protective net 2 is slidably mounted inside the mounting frame 1, the protective net 2 can move left and right inside the mounting frame 1, two limiting blocks 21 on the protective net 2 are respectively positioned inside the limiting grooves 11 on the inner walls of the top and the bottom of the mounting frame 1, when the protective net 2 moves inside the mounting frame 1, the two limiting blocks 21 move inside the two limiting grooves 11 along with the protective net 2, the protective net 2 can keep a linear motion state through the mutual cooperation between the limiting blocks 21 and the limiting grooves 11, the stability of the protective net 2 during moving is improved, the right side end of the limiting groove 11 is provided with an opening, the limiting blocks 21 can enter and exit the limiting grooves 11 through the opening, the protective net 2 is conveniently pulled outwards to adjust the position, the pulling plate 22 is fixed on the mounting frame 1 through the bolt 221, the protective screen 2 can be fixed inside the mounting frame 1 through the bolt 221, the firmness of the protective screen 2 after mounting is improved, the protection effect can be improved, when a worker needs to enter the well for construction, the worker can screw down the bolt 221 and pull the pulling plate 22 outwards, the protective screen 2 can move outwards, an inlet for the worker to enter and exit is formed between the protective screen 2 and the mounting frame 1, the worker can enter the well for construction through the inlet, the operation is simple, the worker can conveniently enter the well for construction, the pulling plate 22 facilitates the worker to pull the protective screen 2 outwards, the worker can automatically control the distance of the protective screen 2 moving outwards during use to control the size of the inlet, the entering and exiting requirements of different workers can be met, the applicability is improved, the supporting plate 3 is arranged at the bottom of the right side wall of the mounting frame 1, after the mounting frame 1 is mounted on a wall surface outside a well mouth, the supporting plate 3 is just positioned in the well mouth, a worker can directly stand on the supporting plate 3 after entering the well mouth through an inlet, the supporting plate 3 can become a foot point of the worker, the worker can stand on the supporting plate 3 for construction in the well, the safety is high, the worker can conveniently carry out construction in the well, the moving plate 4 capable of moving outwards is arranged in the supporting plate 3, the moving plate 4 is fixed in the supporting plate 3 through the two screws 5, the worker takes out the two screws 5 upwards during construction, the moving plate 4 is pulled outwards at the moment, the overall length of the supporting plate 3 and the moving plate 4 can be increased, the standing range of the worker is increased, construction can be carried out at a far position, the working efficiency is improved, after the position of the moving plate 4 is adjusted, the moving plate 5 is used for fixing the position of the moving plate 4 again, and the firmness after the position of the moving, and then the safety is improved, after the construction is finished, the worker returns to the outside of the well, the pulling plate 22 is pushed inwards again to withdraw the protective net 2 into the installation frame 1, after the protective net 2 is withdrawn into the installation frame 1, the protective net 2 is fixed inside the installation frame 1 through the bolt 221, and the protective net 2 blocks a well mouth to perform protection work.
In fig. 1 and 3: an installation cavity 31 is formed in the supporting plate 3, the moving plate 4 is slidably installed in the installation cavity 31, an opening is formed in the right side end of the installation cavity 31, screw holes 311 are formed in the top and the bottom of the installation cavity 31, the screw rod 5 is in threaded connection with the inside of the screw hole 311 located above, two through holes 41 which are symmetrically distributed are formed in the moving plate 4, the screw rod 5 penetrates through the screw hole 311 and the through hole 41 above and is fixedly connected with the inside of the screw hole 311 below in a threaded manner; the moving plate 4 is slidably arranged in the installation cavity 31 in the supporting plate 3, the top and the bottom of the installation cavity 31 are both provided with screw holes 311, the moving plate 4 is internally provided with two through holes 41 matched with the screw holes 311, the screw rod 5 is positioned in the screw hole 311 above, after the position of the moving plate 4 is adjusted, the through hole 41 at the rear part is aligned with the two screw holes 311, at this time, the screw 5 is screwed downwards to tightly connect the screw 5 with the two screw holes 311 and the through hole 41, the position of the movable plate 4 can be fixed, the firmness of the movable plate 4 after the position adjustment can be improved, after the work is finished, the screw 5 is taken down and the movable plate 4 is pushed inwards, can withdraw movable plate 4 inside layer board 3, the through-hole 41 in the place ahead this moment can align with two screw holes 311, can be at this moment again through the fixed position of screw rod 5 with movable plate 4, easy operation conveniently carries out the adjustment and the fixing of movable plate 4 position.
In fig. 1, 2 and 4: the bottom of the right side wall of the mounting frame 1 is provided with a positioning hole 12, and a bolt 221 is screwed and fixed in the positioning hole 12; the bolt 221 penetrates through the pulling plate 22 and is screwed and fixed inside the positioning hole 12 on the right side wall of the mounting frame 1, the pulling plate 22 can be fixed on the mounting frame 1 through mutual matching between the bolt 221 and the positioning hole 12, and then the protective net 2 is fixed inside the mounting frame 1, so that the operation is simple.
In fig. 1: the outer wall of the right side end of the moving plate 4 is fixedly connected with a side plate 42, and the top of the side plate 42 is positioned above the top of the moving plate 4; when the position of the moving plate 4 needs to be adjusted, a worker kicks the side plate 42 at the right side end of the moving plate 4 with feet to enable the moving plate 4 to move outwards, the use is convenient, the top of the side plate 42 is located above the top of the moving plate 4, and therefore the top of the side plate 42 protrudes out of the top end of the moving plate 4, and force application of the worker is facilitated.
The working principle and the using process of the invention are as follows: the mounting frame 1 is fixed on a wall surface outside a well mouth, when a worker needs to enter the well for construction, the worker unscrews the bolt 221 and pulls the pull plate 22 outwards to enable the protective net 2 to move outwards, an inlet for the worker to enter and exit is formed between the protective net 2 and the mounting frame 1, the operation is simple, the worker can conveniently enter the well for construction, the worker can automatically control the distance for the protective net 2 to move outwards during use to control the size of the inlet, the entering and exiting requirements of different workers can be met, the applicability is improved, the worker can directly stand on the supporting plate 3 on the mounting frame 1 after entering the well mouth, the supporting plate 3 can become a foot drop point of the worker, the worker can conveniently carry out the well construction, the safety is high, the movable plate 4 in the supporting plate 3 is moved outwards during use, the movable plate 4 is fixed through the screw rod 5 after the position of the movable plate 4 is adjusted, and the firmness after the position of the movable, the whole length of the supporting plate 3 and the moving plate 4 can be increased, the standing range of workers is increased, construction can be performed on far positions, and the working efficiency is improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a safety device for construction, includes installing frame (1), its characterized in that: the protective net (2) is slidably mounted inside the mounting frame (1), limiting grooves (11) are formed in the top and bottom inner walls of the mounting frame (1), limiting blocks (21) are fixedly connected to the upper end and the lower end of the protective net (2), the two limiting blocks (21) are slidably mounted inside the two limiting grooves (11) respectively, openings are formed in the right side ends of the two limiting grooves (11), a pulling plate (22) is fixedly connected to the outer wall of the right side of the protective net (2), the pulling plate (22) is located outside the mounting frame (1), a bolt (221) is in threaded connection with the bottom end inside the protective net (2), and the bolt (221) penetrates through the protective net (2) and is fixedly screwed inside the mounting frame (1); installing frame (1) right side wall bottom fixedly connected with layer board (3), layer board (3) inside slidable mounting has movable plate (4), movable plate (4) right side end extends to layer board (3) are outside, layer board (3) top inside thread connection has two screw rods (5) that are the symmetric distribution, screw rod (5) with layer board (3) movable plate (4) spiro union is fixed.
2. A safety shield apparatus for use in building operations as claimed in claim 1, wherein: the mounting cavity (31) is formed in the supporting plate (3), the moving plate (4) is slidably mounted in the mounting cavity (31), and an opening is formed in the right side end of the mounting cavity (31).
3. A safety shield apparatus for use in building operations as claimed in claim 2, wherein: screw hole (311) have all been seted up to installation cavity (31) top and bottom, screw rod (5) threaded connection is located the top inside screw hole (311).
4. A safety shield apparatus for use in building operations as claimed in claim 3, wherein: two through holes (41) which are symmetrically distributed are formed in the moving plate (4), the screw rod (5) penetrates through the screw hole (311) and the through hole (41) above, and is fixed in the screw hole (311) below in a threaded manner.
5. A safety shield apparatus for use in building operations as claimed in claim 1, wherein: the bottom of the right side wall of the mounting frame (1) is provided with a positioning hole (12), and the bolt (221) is fixed in the positioning hole (12) in a threaded manner.
6. A safety shield apparatus for use in building operations as claimed in claim 1, wherein: the outer wall of the right side end of the moving plate (4) is fixedly connected with a side plate (42), and the top of the side plate (42) is located above the top of the moving plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328820.9A CN111576900A (en) | 2020-04-23 | 2020-04-23 | Safety protection device for building construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328820.9A CN111576900A (en) | 2020-04-23 | 2020-04-23 | Safety protection device for building construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111576900A true CN111576900A (en) | 2020-08-25 |
Family
ID=72116682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010328820.9A Withdrawn CN111576900A (en) | 2020-04-23 | 2020-04-23 | Safety protection device for building construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111576900A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08257153A (en) * | 1995-03-27 | 1996-10-08 | Kawaju Koji Kk | Rescue rope apparatus |
| KR20050069296A (en) * | 2003-12-31 | 2005-07-05 | 정이수 | A lift safety-net structure double use a machine or a motor |
| EP2000613A1 (en) * | 2007-06-07 | 2008-12-10 | Gélase M. Havyarimana | Device for protecting an opening |
| CN203361675U (en) * | 2013-07-23 | 2013-12-25 | 中建四局第六建筑工程有限公司淮南分公司 | Edge protection device for elevator shaft door on operation floor in construction project |
| CN203867208U (en) * | 2014-05-12 | 2014-10-08 | 江苏建筑职业技术学院 | Safe protection device for elevator shaft opening of building construction |
| KR101541837B1 (en) * | 2014-04-25 | 2015-08-04 | 조영일 | Falling and falling object protection device for concrete form |
| CN204703540U (en) * | 2015-05-20 | 2015-10-14 | 浙江水利水电学院 | A kind of safety device for building operations elevator shaft |
| TWM543868U (en) * | 2016-09-23 | 2017-06-21 | Chang-Yi Wan | Elevator shaft working platform |
| CN206599981U (en) * | 2017-03-16 | 2017-10-31 | 孟宪芳 | Elevator safety devices installation operation platform |
| CN207553635U (en) * | 2017-12-08 | 2018-06-29 | 中建三局第三建设工程有限责任公司 | Elevator shaft safety protection device and elevator |
| CN207988538U (en) * | 2017-12-25 | 2018-10-19 | 高万成 | A kind of overhanging overhanging oblique pull platform of vertical alien invasion |
| CN109695353A (en) * | 2018-12-26 | 2019-04-30 | 杭州江润科技有限公司 | Anti-falling partition system in elevator shaft and construction method |
| CN109972849A (en) * | 2019-04-23 | 2019-07-05 | 杭州昂创科技有限公司 | Inside and outside self-stabilising in sliding type electric stair shaft safety device construction method |
| CN209324015U (en) * | 2018-11-28 | 2019-08-30 | 南博 | A kind of regularization elevator opening protective door |
| CN209339580U (en) * | 2018-12-11 | 2019-09-03 | 天伟建设集团有限公司 | A kind of Telescopic folding elevator regularization operating platform |
| CN209353660U (en) * | 2018-09-10 | 2019-09-06 | 长枫建设集团有限公司 | A kind of portable electric stair shaft workbench |
| CN209494245U (en) * | 2019-01-23 | 2019-10-15 | 郑州市建筑设计院 | A kind of construction protecting device for building elevator |
-
2020
- 2020-04-23 CN CN202010328820.9A patent/CN111576900A/en not_active Withdrawn
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08257153A (en) * | 1995-03-27 | 1996-10-08 | Kawaju Koji Kk | Rescue rope apparatus |
| KR20050069296A (en) * | 2003-12-31 | 2005-07-05 | 정이수 | A lift safety-net structure double use a machine or a motor |
| EP2000613A1 (en) * | 2007-06-07 | 2008-12-10 | Gélase M. Havyarimana | Device for protecting an opening |
| CN203361675U (en) * | 2013-07-23 | 2013-12-25 | 中建四局第六建筑工程有限公司淮南分公司 | Edge protection device for elevator shaft door on operation floor in construction project |
| KR101541837B1 (en) * | 2014-04-25 | 2015-08-04 | 조영일 | Falling and falling object protection device for concrete form |
| CN203867208U (en) * | 2014-05-12 | 2014-10-08 | 江苏建筑职业技术学院 | Safe protection device for elevator shaft opening of building construction |
| CN204703540U (en) * | 2015-05-20 | 2015-10-14 | 浙江水利水电学院 | A kind of safety device for building operations elevator shaft |
| TWM543868U (en) * | 2016-09-23 | 2017-06-21 | Chang-Yi Wan | Elevator shaft working platform |
| CN206599981U (en) * | 2017-03-16 | 2017-10-31 | 孟宪芳 | Elevator safety devices installation operation platform |
| CN207553635U (en) * | 2017-12-08 | 2018-06-29 | 中建三局第三建设工程有限责任公司 | Elevator shaft safety protection device and elevator |
| CN207988538U (en) * | 2017-12-25 | 2018-10-19 | 高万成 | A kind of overhanging overhanging oblique pull platform of vertical alien invasion |
| CN209353660U (en) * | 2018-09-10 | 2019-09-06 | 长枫建设集团有限公司 | A kind of portable electric stair shaft workbench |
| CN209324015U (en) * | 2018-11-28 | 2019-08-30 | 南博 | A kind of regularization elevator opening protective door |
| CN209339580U (en) * | 2018-12-11 | 2019-09-03 | 天伟建设集团有限公司 | A kind of Telescopic folding elevator regularization operating platform |
| CN109695353A (en) * | 2018-12-26 | 2019-04-30 | 杭州江润科技有限公司 | Anti-falling partition system in elevator shaft and construction method |
| CN209494245U (en) * | 2019-01-23 | 2019-10-15 | 郑州市建筑设计院 | A kind of construction protecting device for building elevator |
| CN109972849A (en) * | 2019-04-23 | 2019-07-05 | 杭州昂创科技有限公司 | Inside and outside self-stabilising in sliding type electric stair shaft safety device construction method |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200825 |
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| WW01 | Invention patent application withdrawn after publication |