CN117052168A - A kind of safety protection device for stairwell edge construction - Google Patents
A kind of safety protection device for stairwell edge construction Download PDFInfo
- Publication number
- CN117052168A CN117052168A CN202310903301.4A CN202310903301A CN117052168A CN 117052168 A CN117052168 A CN 117052168A CN 202310903301 A CN202310903301 A CN 202310903301A CN 117052168 A CN117052168 A CN 117052168A
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- column
- fixed column
- telescopic
- wall
- fixed
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Emergency Lowering Means (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
本申请涉及建筑施工防护装置技术领域，提供了一种楼梯间临边施工安全防护装置，包括固定柱一，所述固定柱一的内部顶侧滑动连接有固定柱二，所述固定柱一和固定柱二的内部均设置有用于收纳零部件的收纳机构，所述收纳机构的内部设置有用于展开侧柱的移动展开机构，所述固定柱一的底部设置有用于便于拆分底座的拆装机构，所述固定柱一和固定柱二的两侧外壁均设置有用于固定伸缩横杆的卡接机构。本发明通过收纳机构的设置，使得该防护装置整体便于收纳移动，避免出现拆卸麻烦，运输不便的情况，通过伸缩柱一、复位弹簧一和两侧转盘的配合设置，使得横杆一整体能够进入固定柱一和固定柱二内部。
This application relates to the technical field of building construction protection devices, and provides a stairwell edge construction safety protection device, which includes a fixed column one. The inner top side of the fixed column one is slidingly connected to a fixed column two. The fixed column one and The interior of the fixed column two is provided with a storage mechanism for storing parts. The interior of the storage mechanism is provided with a mobile expansion mechanism for unfolding the side columns. The bottom of the fixed column one is provided with a mechanism to facilitate the disassembly and assembly of the base. Mechanism, the outer walls on both sides of the fixed column one and the fixed column two are provided with snap-in mechanisms for fixing the telescopic crossbar. Through the arrangement of the storage mechanism, the present invention makes the entire protective device easy to store and move, avoiding troublesome disassembly and inconvenient transportation. Through the cooperative arrangement of the telescopic column 1, the return spring 1 and the turntables on both sides, the cross bar 1 can be moved in as a whole. Inside the fixed column one and fixed column two.
Description
Technical Field
The application relates to the technical field of building construction protection devices, in particular to a safety protection device for the edge construction of a stairwell.
Background
The assembled building is formed by transferring a large amount of field operation work in the traditional building mode to a factory, processing and manufacturing building components and accessories (such as floors, wallboards, stairs, balconies and the like) in the factory, transporting to a building construction site, and assembling and installing the building on site in a reliable connection mode. The prefabricated building mainly comprises a prefabricated concrete structure, a steel structure, a modern wood structure building and the like, and is representative of a modern industrial production mode because standardized design, industrial production, assembly construction, informatization management and intelligent application are adopted. The prefabricated stairway is always slower than the cast-in-situ structure in one layer in the assembled building, the stairway can not reach the construction operation surface, and the edge safety protection of the stairway is particularly important.
The prior edge safety protection is mostly formed by erecting steel pipes and fasteners. However, the steel pipe and the fastener are erected to form the edge protection device, so that the problems are solved by the safety protection device for the edge construction of the stairwell, because more parts are required to be assembled, the construction efficiency is low, the disassembly is complicated, and the turnover is inconvenient.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a safety protection device for the edge facing construction of a stairwell, which solves the problems of more parts to be assembled, low construction efficiency, complicated disassembly and inconvenience in turnover of the existing edge facing protection device.
In order to achieve the above purpose, the application is realized by the following technical scheme: the utility model provides a limit construction safety device is faced to stairwell, includes fixed column one, the inside top side sliding connection of fixed column one has fixed column two, the inside of fixed column one and fixed column two all is provided with the receiving mechanism who is used for accomodating spare part, the inside of receiving mechanism is provided with the removal expansion mechanism who is used for expanding the side column, the bottom of fixed column one is provided with the dismouting mechanism that is used for being convenient for split base, the both sides outer wall of fixed column one and fixed column two all is provided with the joint mechanism that is used for fixed flexible horizontal pole.
Preferably, the storage mechanism comprises a first telescopic column, one end of the first telescopic column is rotationally connected to the inner top side of the first fixed column through a rotary table, a first reset spring is arranged on the outer wall of the first telescopic column, two ends of the first reset spring are respectively connected with the outer walls of the two rotary tables, the other end of the first telescopic column is rotationally connected with a first cross rod through the rotary table, and two second cross rods are slidably connected to the inner portion of the first cross rod.
Preferably, the dismounting mechanism comprises a fixed base, the fixed base sliding connection is at the bottom outer wall of fixed column one, outer wall one side sliding connection of fixed base has the traveller, the one end fixedly connected with go-between of traveller one, one side fixedly connected with handle of go-between one, the outer wall mid-side of traveller is provided with compression spring, the outer wall mid-side fixedly connected with go-between two of traveller, the go-between is located compression spring's left side, the equal fixedly connected with spacing of left side both ends of traveller, the bottom right side of fixed column one is provided with the spacing groove.
Preferably, the mobile unfolding mechanism comprises a second telescopic column, one ends of the second telescopic column are respectively and fixedly connected to one sides of the two cross bars, a second reset spring is arranged on the outer wall of the second telescopic column, a first limit plate is fixedly connected to the other end of the second telescopic column, a connecting rod is fixedly connected to one side of the first limit plate, a nut is connected to the middle side of the outer wall of the connecting rod in a threaded mode, a second limit plate is fixedly connected to one end of the outer wall of the connecting rod, and a side column is connected to the left side of the outer wall of the connecting rod through a through groove in a sliding mode.
Preferably, the clamping mechanism comprises a telescopic cross rod, two separated ends of the telescopic cross rod are respectively connected to the upper side and the lower side of the corresponding side column in a rotating mode through a rotating shaft, a clamping block is connected to the top of one side of the telescopic cross rod in a rotating mode through a rotating rod, a clamping groove is formed in the bottom of one side of the telescopic cross rod, telescopic rods are respectively fixedly connected to the two sides of the bottom of the first fixed column and the two sides of the top of the second fixed column, springs are arranged on the outer wall of each telescopic rod, a clamping plate is fixedly connected to one end of each telescopic rod, and the clamping plates are correspondingly arranged with the clamping grooves.
Preferably, the two sides of the slotting position of the first fixing column and the second fixing column are respectively provided with a binding belt for limiting and fixing.
Preferably, one side of the inside of unable adjustment base threaded connection has the threaded rod, sideslip in the outer wall of threaded rod is connected with the mount, the outer wall bottom side threaded connection of threaded rod has fastening nut, the mount is located unable adjustment base's below.
Preferably, the tops of the second fixing column and the two side columns are respectively provided with an anti-collision pad for preventing collision.
Preferably, one end of the compression spring is connected with the outer wall of the second connecting ring, and the other end of the compression spring is connected with the outer wall of the first connecting ring.
Preferably, the nut is located on the right side of the through groove, and the limiting disc is located on the left side of the through groove.
Working principle: when the sliding column is used, through the arrangement of the dismounting mechanism, the fixed base and the fixed column I can be dismounted, during dismounting, the handle is rotated for ninety degrees, the sliding column is driven to move outwards by pulling the handle, so that the limiting strips slide out of the limiting grooves, the dismounting is completed, and the same is true during mounting; the fixing frame is clamped by rotating the fastening nut after being moved to a proper position at the bottom of the side face of the stair, and the fixing base is positioned at the top of the side face of the stair; after the fixing is finished, the first transverse rod is pulled outwards to separate from the first fixing column and the second fixing column, the first transverse rod is limited through the first reset spring after rotating for a certain degree, and the second transverse rod is pulled to two sides, so that the side columns can be connected through the matching of the second telescopic column, the second reset spring, the second limiting disc, the connecting rod and the through groove, separated from the second transverse rod, limited after rotating for a certain angle and further fixed through the nut; at the moment, two opposite telescopic cross bars in the side column are opened through the rotating shaft, corresponding clamping blocks on the telescopic cross bars are clamped with the outer walls of the fixed columns, the clamping plates are driven to move upwards through the telescopic bars and the springs, and the clamping blocks are butted with clamping grooves on the telescopic cross bars, so that the fixing is completed; the whole protector is convenient for accomodate and remove, avoids appearing dismantling trouble, the inconvenient condition of transportation, can carry out the angular adjustment of certain slope when the device uses simultaneously, is convenient for adapt to the stair on different inclined planes, can be used for the plane protection simultaneously, has enlarged application scope.
The application provides a safety protection device for the edge-facing construction of a stairwell. The beneficial effects are as follows:
1. according to the application, through the arrangement of the storage mechanism, the whole protection device is convenient to store and move, the situations of troublesome disassembly and inconvenient transportation are avoided, and through the matched arrangement of the telescopic column I, the reset spring I and the turntables at the two sides, the whole cross rod I can enter the fixed column I and the fixed column II, and the protection device is convenient to store and move and turn according to actual situations.
2. According to the application, through the arrangement of the dismounting mechanism, the fixed base and the fixed column I can be dismounted, so that the fixed column I can be connected with the supporting surface by using the fixed bases with different types, and meanwhile, the movable turnover is further convenient.
3. According to the application, through the arrangement of the movable unfolding mechanism, the side posts on two sides can be unfolded, so that the protective device is formed, and meanwhile, certain adjustment can be carried out, and the use is convenient.
4. According to the application, through the arrangement of the clamping mechanism, the telescopic cross rod can be fixed, and meanwhile, the telescopic cross rod can be subjected to certain inclined angle adjustment, so that the telescopic cross rod is convenient to adapt to stairs with different inclined planes, can be used for plane protection, and can be used for expanding the application range.
Drawings
Fig. 1 is a perspective view of a storage state of the present application;
FIG. 2 is a schematic view of a disassembling mechanism according to the present application;
FIG. 3 is a schematic view of a housing mechanism according to the present application;
FIG. 4 is a schematic view of a return spring of the present application in a position;
FIG. 5 is a schematic illustration of the position of a jamb in accordance with the present application;
FIG. 6 is a schematic diagram of a mobile deployment mechanism according to the present application;
FIG. 7 is a schematic view of the protection state of the present application;
fig. 8 is a schematic view of a clamping mechanism according to the present application.
Wherein, 1, fixing column I; 2. fixing the second column; 3. a crash pad; 4. a fixed base; 5. a threaded rod; 6. a fixing frame; 7. a spool; 8. a first connecting ring; 9. a handle; 10. a compression spring; 11. a second connecting ring; 12. a limit bar; 13. a limit groove; 14. a telescopic column I; 15. a first reset spring; 16. a first cross bar; 17. a second cross bar; 18. a telescopic column II; 19. a second reset spring; 20. a first limiting disc; 21. a connecting rod; 22. a nut; 23. a second limiting plate; 24. a side column; 25. a through groove; 26. a telescopic cross bar; 27. a clamping block; 28. a clamping groove; 29. a telescopic rod; 30. a spring; 31. a clamping plate; 32. and (5) fastening the nut.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Examples:
referring to fig. 1-8, an embodiment of the application provides a safety protection device for a stair tread construction, which comprises a first fixed column 1, wherein a second fixed column 2 is slidingly connected to the top of the first fixed column 1, storage mechanisms for storing parts are arranged in the first fixed column 1 and the second fixed column 2, a movable unfolding mechanism for unfolding a side column 24 is arranged in the storage mechanisms, a dismounting mechanism for facilitating the base disassembly is arranged at the bottom of the first fixed column 1, and clamping mechanisms for fixing telescopic cross bars 26 are arranged on the outer walls of two sides of the first fixed column 1 and the second fixed column 2.
The containing mechanism comprises a first telescopic column 14, one end of the first telescopic column 14 is rotationally connected to the inner top side of a first fixed column 1 through a rotary table, a first reset spring 15 is arranged on the outer wall of the first telescopic column 14, two ends of the first reset spring 15 are respectively connected with the outer walls of the two rotary tables, a first cross rod 16 is rotationally connected to the other end of the first telescopic column 14 through the rotary table, and two second cross rods 17 are slidingly connected to the inner portion of the first cross rod 16.
Through storage mechanism's setting for this protector is whole to be convenient for accomodate and removes, avoids appearing dismantling trouble, and the inconvenient condition of transportation sets up through the cooperation of flexible post one 14, reset spring one 15 and both sides carousel, makes the horizontal pole one 16 whole can get into inside fixed column one 1 and fixed column two 2, accomodates according to actual conditions, is convenient for remove the turnover.
The disassembly and assembly mechanism comprises a fixed base 4, the fixed base 4 is slidably connected to the outer wall of the bottom of a first fixed column 1, one side of the outer wall of the fixed base 4 is slidably connected with a sliding column 7, one end of the sliding column 7 is fixedly connected with a first connecting ring 8, one side of the first connecting ring 8 is fixedly connected with a handle 9, the middle side of the outer wall of the sliding column 7 is provided with a compression spring 10, the middle side of the outer wall of the sliding column 7 is fixedly connected with a second connecting ring 11, the second connecting ring 11 is positioned on the left side of the compression spring 10, the two ends of the left side of the sliding column 7 are fixedly connected with limiting strips 12, and the right side of the bottom of the first fixed column 1 is provided with a limiting groove 13.
Through the setting of dismouting mechanism for unable adjustment base 4 and fixed column 1 can the split, unable adjustment base 4 of the different models of convenient to use links to each other fixed column 1 with the holding surface, can adapt to the screw of certain offset position through rectangular through-hole 5 simultaneously, make fixed column 1 link to each other with the holding surface through unable adjustment base 4, during the dismantlement, at first rotate handle 9 ninety degrees, drive the outside removal of traveller 7 through pulling handle 9, make spacing 12 roll-off spacing groove 13, accomplish the dismantlement, the same reason during the installation.
The movable unfolding mechanism comprises a second telescopic column 18, one ends of the second telescopic column 18 are respectively and fixedly connected to one sides of the two cross bars 17, a second reset spring 19 is arranged on the outer wall of the second telescopic column 18, a first limiting plate 20 is fixedly connected to the other end of the second telescopic column 18, a connecting rod 21 is fixedly connected to one side of the first limiting plate 20, a nut 22 is connected to the middle side of the outer wall of the connecting rod 21 in a threaded mode, a second limiting plate 23 is fixedly connected to one end outer wall of the connecting rod 21, and a side column 24 is connected to the left side of the outer wall of the connecting rod 21 in a sliding mode through a through groove 25.
Pulling the second cross rod 17 to two sides, so that the side column 24 can be connected through the matching of the second telescopic column 18, the second return spring 19, the second limiting disc 23, the connecting rod 21 and the through groove 25, and is limited after being separated from the second cross rod 17 and rotated for a certain angle, and further fixed through the nut 22
The joint mechanism includes flexible horizontal pole 26, the both sides about the inside of side post 24 that correspond are all connected in the rotation of one end that separates of two flexible horizontal poles 26 through the pivot, one side top of flexible horizontal pole 26 is connected with joint piece 27 through the bull stick rotation, one side bottom of flexible horizontal pole 26 is provided with draw-in groove 28, the equal fixedly connected with telescopic link 29 in bottom both sides of fixed column one 1 and the top both sides of fixed column two 2, telescopic link 29's outer wall is provided with spring 30, telescopic link 29's one end fixedly connected with joint board 31, joint board 31 and draw-in groove 28 are corresponding the setting.
Two opposite telescopic cross bars 26 inside the side posts 24 are opened through the rotating shafts, corresponding clamping blocks 27 on the telescopic cross bars 26 are clamped with the outer walls of the fixed posts II 2, clamping plates 31 are driven to move upwards through telescopic rods 29 and springs 30 at the moment, and are in butt joint with clamping grooves 28 on the telescopic cross bars 26, so that fixation is completed.
The two sides of the slotting part of the first fixing column 1 and the second fixing column 2 are respectively provided with a binding belt for limiting and fixing.
The internal part can be fixed in the first fixing column 1 and the second fixing column 2 through the binding band, and the internal part can fall off during turnover avoidance.
The inside one side threaded connection of unable adjustment base 4 has threaded rod 5, and sideslip in the outer wall of threaded rod 5 is connected with mount 6, and the outer wall downside threaded connection of threaded rod 5 has fastening nut 32, and mount 6 is located unable adjustment base 4's below.
Through rotating fastening nut 32, make it become flexible break away from the surface of threaded rod 5, remove mount 6 to the proper position back of stair side bottom, press from both sides it tightly through rotating fastening nut 32, unable adjustment base 4 is located stair side top this moment, mount 6 is located stair side bottom, carries out the centre gripping through threaded rod 5 and fastening nut 32 and fixes.
The tops of the second fixing column 2 and the two side columns 24 are provided with anti-collision cushions 3 for preventing collision.
One end of the compression spring 10 is connected with the outer wall of the connecting ring II 11, and the other end of the compression spring 10 is connected with the outer wall of the connecting ring I8.
The nut 22 is positioned on the right side of the through groove 25, and the second limiting plate 23 is positioned on the left side of the through groove 25.
The side column 24 is extruded by the rotating nut 22, and is matched with the limiting plate II 23 to fix the side column 24.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a limit construction safety device is faced to stairwell, includes fixed column one (1), its characterized in that, the inside top side sliding connection of fixed column one (1) has fixed column two (2), the inside of fixed column one (1) and fixed column two (2) all is provided with the receiving mechanism who is used for accomodating spare part, the inside of receiving mechanism is provided with the removal expansion mechanism who is used for expanding side column (24), the bottom of fixed column one (1) is provided with the dismouting mechanism that is used for the split base of being convenient for, the both sides outer wall of fixed column one (1) and fixed column two (2) all is provided with the joint mechanism that is used for fixed flexible horizontal pole (26).
2. The safety protection device for the edge construction of the stairwell according to claim 1, wherein the storage mechanism comprises a first telescopic column (14), one end of the first telescopic column (14) is rotationally connected to the inner top side of the first fixed column (1) through a turntable, a first return spring (15) is arranged on the outer wall of the first telescopic column (14), two ends of the first return spring (15) are respectively connected with the outer walls of the two turntable, a first cross rod (16) is rotationally connected to the other end of the first telescopic column (14) through the turntable, and two second cross rods (17) are slidingly connected to the inner part of the first cross rod (16).
3. The safety protection device for the edge construction of the stairwell according to claim 1, wherein the dismounting mechanism comprises a fixed base (4), the fixed base (4) is slidably connected to the outer bottom wall of the first fixed column (1), a sliding column (7) is slidably connected to one side of the outer wall of the fixed base (4), a connecting ring (8) is fixedly connected to one end of the sliding column (7), a handle (9) is fixedly connected to one side of the connecting ring (8), a compression spring (10) is arranged on the middle side of the outer wall of the sliding column (7), a connecting ring two (11) is fixedly connected to the middle side of the outer wall of the sliding column (7), the connecting ring two (11) is located on the left side of the compression spring (10), limit bars (12) are fixedly connected to two ends of the left side of the sliding column (7), and limit grooves (13) are formed in the right side of the bottom of the first fixed column (1).
4. The safety protection device for the edge facing construction of the stairwell according to claim 1, wherein the movable unfolding mechanism comprises a telescopic column two (18), one ends of the telescopic column two (18) are respectively fixedly connected to one sides of the two cross bars two (17) which are separated from each other, a reset spring two (19) is arranged on the outer wall of the telescopic column two (18), a limiting disc one (20) is fixedly connected to the other end of the telescopic column two (18), a connecting rod (21) is fixedly connected to one side of the limiting disc one (20), a nut (22) is connected to the middle side of the outer wall of the connecting rod (21), a limiting disc two (23) is fixedly connected to one end outer wall of the connecting rod (21), and a side column (24) is slidingly connected to the left side of the outer wall of the connecting rod (21) through a through groove (25).
5. The stair well limb construction safety protection device according to claim 1, wherein the clamping mechanism comprises a telescopic cross rod (26), two separated ends of the telescopic cross rod (26) are respectively connected to the upper side and the lower side of the corresponding side column (24) through rotation of a rotating shaft, a clamping block (27) is rotatably connected to one side top of the telescopic cross rod (26) through a rotating rod, a clamping groove (28) is formed in one side bottom of the telescopic cross rod (26), telescopic rods (29) are fixedly connected to the two sides of the bottom of the first fixed column (1) and the two sides of the top of the second fixed column (2), springs (30) are arranged on the outer wall of the telescopic rods (29), clamping plates (31) are fixedly connected to one ends of the telescopic rods (29), and the clamping plates (31) and the clamping grooves (28) are correspondingly arranged.
6. The safety protection device for the edge construction of the stairwell according to claim 1, wherein the two sides of the grooving of the first fixing column (1) and the second fixing column (2) are respectively provided with a binding belt for limiting and fixing.
7. A safety device for the edge construction of a stairwell according to claim 3, characterized in that a threaded rod (5) is connected to one side of the inside of the fixed base (4) in a threaded manner, a fixing frame (6) is connected to the middle side of the outer wall of the threaded rod (5) in a sliding manner, a fastening nut (32) is connected to the bottom side of the outer wall of the threaded rod (5) in a threaded manner, and the fixing frame (6) is located below the fixed base (4).
8. The safety protection device for the edge construction of the stairwell according to claim 1, wherein the tops of the second fixing column (2) and the two side columns (24) are respectively provided with an anti-collision pad (3) for preventing collision.
9. A safety device for the edge construction of a stairwell according to claim 3, wherein one end of the compression spring (10) is connected with the outer wall of the second connecting ring (11), and the other end of the compression spring (10) is connected with the outer wall of the first connecting ring (8).
10. The safety device for the edge construction of the stairwell according to claim 4, wherein the nut (22) is positioned on the right side of the through groove (25), and the limiting disc II (23) is positioned on the left side of the through groove (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310903301.4A CN117052168B (en) | 2023-07-22 | 2023-07-22 | A safety protection device for construction near the edge of a stairwell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310903301.4A CN117052168B (en) | 2023-07-22 | 2023-07-22 | A safety protection device for construction near the edge of a stairwell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117052168A true CN117052168A (en) | 2023-11-14 |
| CN117052168B CN117052168B (en) | 2026-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310903301.4A Active CN117052168B (en) | 2023-07-22 | 2023-07-22 | A safety protection device for construction near the edge of a stairwell |
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| CN (1) | CN117052168B (en) |
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| CN208097419U (en) * | 2018-04-10 | 2018-11-16 | 霍淑龙 | A kind of easy-to-mount movies-making background frame |
| CN211684475U (en) * | 2019-12-28 | 2020-10-16 | 徐州中岩岩土工程有限公司 | A portable painting stand for engineering design |
| CN211818528U (en) * | 2020-03-09 | 2020-10-30 | 龙燕 | Warning device convenient to store for elevator maintenance |
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| Publication number | Publication date |
|---|---|
| CN117052168B (en) | 2026-04-17 |
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