CN214329795U - Building outer wall construction platform - Google Patents
Building outer wall construction platform Download PDFInfo
- Publication number
- CN214329795U CN214329795U CN202023195012.4U CN202023195012U CN214329795U CN 214329795 U CN214329795 U CN 214329795U CN 202023195012 U CN202023195012 U CN 202023195012U CN 214329795 U CN214329795 U CN 214329795U
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- sliding
- bidirectional screw
- sliding groove
- construction platform
- sliding blocks
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- 238000010276 construction Methods 0.000 title claims abstract description 56
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 64
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 13
- 238000009435 building construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of building construction, especially, relate to a building outer wall construction platform, the on-line screen storage device comprises a base, an adjusting plate, adjusting part and at least two sets of lifting unit, adjusting part includes first bidirectional screw, at least two extension boards, at least two sliding blocks and first driving piece, at least one sliding groove has been seted up on the adjusting plate, extension board and sliding block are connected, first bidirectional screw runs through two sliding blocks in the same sliding groove, the positive thread section of first bidirectional screw and the reverse thread section of first bidirectional screw and sliding block threaded connection, first bidirectional screw sets up along the length direction of sliding groove, and first bidirectional screw and adjusting plate rotate and be connected, first bidirectional screw is connected with first driving piece; through adjusting part for the extension board can slide, and the increase is convenient for enlarge constructor's the area of can being under construction, improves the efficiency of construction to constructor's supported area.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a building outer wall construction platform.
Background
The building construction refers to the construction process of various buildings, namely the process of building physical construction on a designated place according to a design drawing. The building construction mainly comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like, and construction is often carried out by auxiliary workers through a construction platform in the building construction process.
The Chinese patent with the application number of 202020095440.0 discloses a construction platform for external walls of buildings, which comprises a bottom plate, wherein a hydraulic telescopic rod is fixedly arranged in the middle of the upper surface of the bottom plate, an adjusting plate is fixedly arranged at the upper end of the hydraulic telescopic rod, telescopic mechanisms are fixedly arranged at four corners of the upper surface of the bottom plate, the upper ends of the telescopic mechanisms are fixedly arranged at the lower surface of the adjusting plate, supporting legs are fixedly arranged at four corners of the lower surface of the bottom plate, rolling wheels are fixedly arranged at the lower ends of the supporting legs, a transverse plate is fixedly arranged at the upper part of one side of each supporting leg, reinforcing mechanisms are fixedly arranged at four corners of the lower surface of the bottom plate respectively, each reinforcing mechanism comprises a sleeve fixedly arranged at one side of the lower surface of the transverse plate, a reinforcing cone is inserted in the sleeve, a strip-shaped groove is formed in the lower part of one side of the inner wall of the sleeve, a connecting rod is fixedly arranged at the upper part of one side of the reinforcing cone, and one end of the connecting rod penetrates through the strip-shaped groove and is fixedly provided with a pedal, the upper part of one side of the inner wall of the sleeve is connected with a fastening nut through threads, the fastening nut is positioned right above the strip-shaped groove, and one end of the fastening nut is in fastening connection with the upper part of one side of the reinforcing cone.
In view of the above-mentioned related technologies, the applicant believes that in the construction process of a building, the position of a construction platform of an outer wall of the building needs to be adjusted according to the construction position, which affects the construction period.
SUMMERY OF THE UTILITY MODEL
In order to improve the cycle of building construction, this application provides a building outer wall construction platform.
The application provides a building outer wall construction platform adopts following technical scheme:
the utility model provides a building outer wall construction platform, includes base, regulating plate, adjusting part and at least two sets of lifting unit, the regulating plate is located directly over on the base, lifting unit is located between base and the regulating plate, and can drive the regulating plate goes up and down, adjusting part includes two extension boards, at least first bidirectional screw, at least one first driving piece and at least two sliding blocks, at least one sliding groove has been seted up on the regulating plate, extension board and sliding block are connected, just sliding block can follow sliding groove slides, first bidirectional screw runs through same two in the sliding groove sliding block, the positive thread section of first bidirectional screw and the reverse thread section of first bidirectional screw with sliding block threaded connection, first bidirectional screw follows sliding groove's length direction sets up, just first bidirectional screw rotates with the regulating plate and is connected, the first bidirectional screw is connected with a first driving piece, and the first driving piece can drive the first bidirectional screw to rotate.
By adopting the technical scheme, when the construction platform is used, the lifting assembly is adjusted, the adjusting plate can be adjusted, and construction of different heights of the building outer wall is facilitated; the first driving piece is adjusted to drive the first bidirectional screw to rotate, the first bidirectional screw drives the sliding block to slide along the sliding groove, and the sliding block drives the extension plates to move towards the sides away from each other, so that the construction range of workers is enlarged; the building outer wall construction platform of design through adjusting part for the extension board can slide, and the increase is convenient for enlarge constructor's the area of can being under construction to constructor's support area, and the position adjustment of construction platform improves the efficiency of construction in the building outer wall work progress.
Optionally, the first driving member includes a first driving motor, a driving bevel gear and a driven bevel gear, the driven bevel gear and the first bidirectional screw are concentrically disposed, the first driving motor is located on the adjusting plate, and the driving bevel gear meshed with the driven bevel gear is coaxially disposed on an output shaft of the first driving motor.
By adopting the technical scheme, the first driving motor is adjusted, the output shaft of the first driving motor drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the first bidirectional screw to rotate, the first bidirectional screw drives the sliding block to slide along the sliding groove, and the sliding block drives the extension plates to deviate from or approach to each other; the first driving piece is convenient for drive the first bidirectional screw rod to rotate, and then the position of the extension plate is adjusted.
Optionally, the lifting unit includes second driving piece, sliding part, two direction sliders and two keysets, the direction spout has been seted up on the base roof, the direction spout is followed the length direction in groove that slides sets up mutually, the regulating plate is connected with sliding part, sliding part keeps away from regulating plate one side is rotated with the keyset and is connected, two the keyset rotates through the pivot and connects, and two the keyset sets up about pivot axis bilateral symmetry, the keyset is kept away from sliding part one end rotates with the direction slider to be connected, two the direction slider all with the direction spout slides and is connected, the second driving piece can drive two the direction slider is in opposite directions or deviates from the motion.
By adopting the technical scheme, the second driving piece is adjusted, the second driving piece drives the guide sliding blocks to slide along the guide sliding grooves, the two guide sliding blocks are close to or far away from each other, the two guide sliding blocks respectively drive the switching rod to move, the switching rod rotates, and the adjusting plate ascends or descends under the action of the sliding piece, so that the height adjustment of the adjusting plate is realized; the lifting unit who designs rotates the contained angle of two switching poles of connection through the regulation, and then realizes the altitude mixture control to the adjusting plate, and the constructor of being convenient for is under construction to the co-altitude not of building outer wall, improves construction platform's application scope.
Optionally, the second driving part includes a second bidirectional screw and a second driving motor, the second bidirectional screw is disposed along the length direction of the guide sliding chute, the second bidirectional screw penetrates through the two guide sliding blocks, a forward thread section of the second bidirectional screw and a backward thread section of the second bidirectional screw are respectively in threaded connection with the guide sliding blocks, an extending section of the second bidirectional screw extending out of the base is coaxially disposed with an output shaft of the second driving motor, and the second bidirectional screw is rotatably connected with the base.
By adopting the technical scheme, the second driving motor is adjusted, the driving shaft of the second driving motor drives the second bidirectional screw to rotate, the second bidirectional screw drives the guide sliding blocks to slide along the guide sliding grooves, the two guide sliding blocks are close to or far away from each other, the two guide sliding blocks respectively drive the adapter rod to move, the adapter rod rotates, and the adjusting plate ascends or descends under the action of the sliding piece, so that the height adjustment of the adjusting plate is realized; the second driving piece of design is convenient for to the direction slider application of force for two direction sliders are close to each other or are kept away from, realize the altitude mixture control of regulating plate.
Optionally, the sliding part includes two sliding blocks, the confession has been seted up on the regulating plate diapire the sliding tray that the sliding block slided, the sliding tray is followed the length direction in sliding tray sets up, two the sliding block is located same the sliding tray just can be followed the sliding tray slides, the sliding block stretches out the extending section of sliding tray with the changeover lever rotates and is connected.
Through adopting above-mentioned technical scheme, the piece that slides of design, the changeover lever of being convenient for slides along the diapire of regulating plate, reduces the frictional force between changeover lever and the regulating plate, realizes the altitude mixture control to the regulating plate.
Optionally, two pressing plates are arranged on the adjusting plate, the pressing plates are arranged along the length direction of the sliding groove, and two limiting sliding grooves for the extending plates to slide are formed in one side, close to each other, of the pressing plates.
Through adopting above-mentioned technical scheme, the clamp plate of design is convenient for lead to the both sides of extension board, simultaneously, can carry on spacingly to the extension board again, avoids leading to the extension board to take place to damage for extension board local atress is too big, improves the life of extension board.
Optionally, the side wall of the adjusting plate is rotatably connected with at least two supporting plates capable of abutting against the bottom wall of the extending plate.
Through adopting above-mentioned technical scheme, the backup pad of design can improve the support intensity to extending the board, improves construction platform's security performance, prolongs the life of extending the board.
Optionally, a guard rail is arranged on the adjusting plate.
By adopting the technical scheme, the designed guard rail can improve the safety protection performance of the construction platform.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the designed building outer wall construction platform, the extension plate can slide through the adjusting assembly, so that the supporting area of constructors is increased, the constructors can conveniently enlarge the construction area, the position of the construction platform is adjusted in the building outer wall construction process, and the construction efficiency is improved;
2. the building outer wall construction platform of design through lifting unit, rotates the contained angle of two switching poles of connection through the regulation, and then realizes the altitude mixture control to the adjusting plate, and the constructor of being convenient for is under construction the not co-altitude of building outer wall, improves construction platform's application scope.
Drawings
Fig. 1 is a schematic overall structure diagram of a construction platform for an external wall of a building.
Fig. 2 is a sectional view of a construction platform for an exterior wall of a building.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
Fig. 4 is an enlarged schematic view of a portion B of fig. 2.
Description of reference numerals: 1. a base; 2. an adjusting plate; 21. pressing a plate; 22. a limiting chute; 3. an adjustment assembly; 31. an extension plate; 32. a first drive motor; 33. a drive bevel gear; 34. a driven bevel gear; 35. a first bidirectional screw; 36. a sliding groove; 37. a sliding block; 4. a lifting assembly; 41. a second drive motor; 42. a guide chute; 43. a second bidirectional screw; 44. a guide slider; 45. a transfer lever; 46. a rotating shaft; 47. a sliding groove; 48. a slider; 5. protecting the fence; 6. and a support plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a construction platform for an external wall of a building. Referring to fig. 1, the building outer wall construction platform comprises a base 1, an adjusting plate 2, adjusting assemblies 3 and at least two groups of lifting assemblies 4, wherein the adjusting plate 2 is positioned right above the base 1, the lifting assemblies 4 are positioned between the base 1 and the adjusting plate 2 and can drive the adjusting plate 2 to lift, and the two groups of lifting assemblies 4 are arranged in the embodiment; the adjusting component 3 is positioned on the adjusting plate 2, a protective guard 5 is welded on the adjusting plate 2, and the protective guard 5 is arranged along the length direction of the adjusting plate 2.
Referring to fig. 2 and 3, the adjusting assembly 3 includes two extending plates 31, at least one first bidirectional screw 35, at least one first driving member, and at least two sliding blocks 37, the adjusting plate 2 is provided with at least one sliding groove 36, and the two sliding grooves 36 are arranged in parallel along the length direction, in this embodiment, the first bidirectional screw 35 is provided with two, the first driving member is provided with two, the sliding blocks 37 are provided with four, the sliding grooves 36 are provided with two, the sliding blocks 37 are welded on the bottom wall of the extending plate 31, the sliding blocks 37 in the same sliding groove 36 are provided with two, and the sliding blocks 37 can slide along the sliding grooves 36, the first bidirectional screws 35 all penetrate through the two sliding blocks 37 in the same sliding groove 36, and the first bidirectional screw 35 is connected with the sliding blocks 37 by screw threads, the first bidirectional screw 35 is arranged along the length direction of the sliding groove 36, and the first bidirectional screw 35 is rotatably connected with the adjusting plate 2, the first bidirectional screw 35 is connected with a first driving member, and the first driving member can drive the first bidirectional screw 35 to rotate; the first driving part comprises a first driving motor 32, a driving bevel gear 33 and a driven bevel gear 34, the driven bevel gear 34 is arranged concentrically with the first bidirectional screw 35, the driven bevel gear 34 is in key connection with the first bidirectional screw 35, and the driven bevel gear 34 is positioned at the connection part of the forward thread section of the first bidirectional screw 35 and the reverse thread section of the first bidirectional screw 35; the first driving motor 32 is mounted on the adjusting plate 2 through a bolt, a driving bevel gear 33 meshed with the driven bevel gear 34 is coaxially arranged on an output shaft abutted against the first driving motor 32, and the driving bevel gear 33 is in key connection with the output shaft of the first driving motor 32.
Referring to fig. 1 and 3, at least two pressing plates 21 are arranged on the adjusting plate 2, two pressing plates 21 are arranged in the embodiment, the pressing plates 21 are arranged along the length direction of the sliding groove 36, a limiting sliding groove 22 for sliding the extending plate 31 is formed on one side of the pressing plates 21 close to each other, and the guard rail 5 is located on one side of the two pressing plates 21 away from each other; rotate on the lateral wall of regulating plate 2 and be connected with two piece at least backup pads 6 that can support extension board 31, backup pad 6 is provided with four in this embodiment, and backup pad 6 symmetric distribution is on the relative both sides wall of regulating plate 2, and backup pad 6 passes through the axis of rotation to be connected with regulating plate 2 rotation, and the axis of rotation welds with regulating plate 2.
Referring to fig. 3 and 4, the lifting assembly 4 includes a second driving member, a sliding member, two guiding sliders 44 and two adapter rods 45, a guiding chute 42 is formed in the top wall of the base 1, the guiding chute 42 is arranged along the length direction of the sliding groove 36, the adjusting plate 2 is connected with the sliding member, one side of the sliding member, away from the adjusting plate 2, is rotatably connected with the adapter rods 45, one end of the adapter rods 45, away from the sliding member, is rotatably connected with the guiding sliders 44, the two adapter rods 45 are rotatably connected through a rotating shaft 46, the two adapter rods 45 are symmetrically arranged on two sides of the axis of the rotating shaft 46, the two guiding sliders 44 are slidably connected with the guiding chute 42, and the second driving member can drive the two guiding sliders 44 to move in an opposite direction or in a deviating direction; the sliding piece comprises two sliding blocks 48, a sliding groove 47 for the sliding blocks 48 to slide is formed in the bottom wall of the adjusting plate 2, the sliding groove 47 is arranged along the length direction of the sliding groove 36, the two sliding blocks 48 are connected with the sliding groove 36 in a sliding mode, and the extending sections of the sliding blocks 48 extending out of the sliding groove 47 are respectively connected with the adapter rod 45 in a rotating mode; the second driving member includes a second bidirectional screw 43 and a second driving motor 41, the second bidirectional screw 43 is disposed through the two guide sliders 44, the second bidirectional screw 43 is disposed along the length direction of the guide chute 42, a forward thread section of the second bidirectional screw 43 and a reverse thread section of the second bidirectional screw 43 are respectively in threaded connection with the guide sliders 44, an extension section of the second bidirectional screw 43 extending out of the base 1 is coaxially disposed with an output shaft of the second driving motor 41, the extension section of the second bidirectional screw 43 is connected with the output shaft of the second driving motor 41 through a coupling, and the second bidirectional screw 43 is rotatably connected with the base 1.
The implementation principle of the building outer wall construction platform in the embodiment of the application is as follows: when the construction platform is used, the second driving motor 41 is adjusted, the driving shaft of the second driving motor 41 drives the second bidirectional screw 43 to rotate, the second bidirectional screw 43 drives the guide slide block 44 to slide along the guide sliding groove 42, the two guide slide blocks 44 are close to or far away from each other, the two guide slide blocks 44 respectively drive the adapter rod 45 to move, the adapter rod 45 rotates, and the adjusting plate 2 ascends or descends under the action of the pressing plate 21, so that construction can be conveniently carried out on different heights of the building outer wall; the first driving motor 32 is adjusted, an output shaft of the first driving motor 32 drives the driving bevel gear 33 to rotate, the driving bevel gear 33 drives the driven bevel gear 34 to rotate, the driven bevel gear 34 drives the first bidirectional screw 35 to rotate, the first bidirectional screw 35 drives the sliding block 37 to slide along the sliding groove 36, the sliding block 37 drives the extension plate 31 to deviate from or approach to each other, and adjustment of the extension plate 31 in the length direction of the support plate 6 is achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a building outer wall construction platform, its characterized in that, includes base (1), regulating plate (2), adjusting part (3) and at least two sets of lifting unit (4), regulating plate (2) are located directly over on base (1), lifting unit (4) are located between base (1) and regulating plate (2), and can drive regulating plate (2) go up and down, adjusting part (3) include two extension boards (31), at least first two-way screw (35), at least one first driving piece and at least two sliding blocks (37), at least one sliding groove (36) have been seted up on regulating plate (2), extension board (31) are connected with sliding block (37), just sliding block (37) can be followed sliding groove (36) slide, first two-way screw (35) run through same two sliding blocks (37) in sliding groove (36), the positive thread section of first two-way screw (35) and the negative thread section of first two-way screw (35) with sliding block (37) threaded connection, first two-way screw (35) are followed the length direction setting of groove (36) slides, just first two-way screw (35) rotate with regulating plate (2) and are connected, first two-way screw (35) are connected with first driving piece, just first driving piece can drive first two-way screw (35) rotate.
2. The building exterior wall construction platform according to claim 1, wherein the first driving member comprises a first driving motor (32), a driving bevel gear (33) and a driven bevel gear (34), the driven bevel gear (34) is concentrically arranged with a first bidirectional screw (35), the first driving motor (32) is positioned on the adjusting plate (2), and the driving bevel gear (33) meshed with the driven bevel gear (34) is coaxially arranged on an output shaft of the first driving motor (32).
3. The building outer wall construction platform according to claim 1, wherein the lifting assembly (4) comprises a second driving member, a sliding member, two guiding sliding blocks (44) and two adapter rods (45), a guiding sliding groove (42) is formed in the top wall of the base (1), the guiding sliding groove (42) is formed along the length direction of the sliding groove (36), the adjusting plate (2) is connected with the sliding member, one side of the sliding member, far away from the adjusting plate (2), is rotatably connected with the adapter rods (45), the two adapter rods (45) are rotatably connected through a rotating shaft (46), the two adapter rods (45) are symmetrically arranged on two sides of the axis of the rotating shaft (46), one end, far away from the sliding member, of the adapter rod (45) is rotatably connected with the guiding sliding blocks (44), and the two guiding sliding blocks (44) are both slidably connected with the guiding sliding groove (42), the second driving piece can drive the two guide sliding blocks (44) to move towards or away from each other.
4. The building exterior wall construction platform according to claim 3, wherein the second driving member comprises a second bidirectional screw (43) and a second driving motor (41), the second bidirectional screw (43) is arranged along the length direction of the guide sliding groove (42), the second bidirectional screw (43) is arranged through the two guide sliding blocks (44), a forward thread section of the second bidirectional screw (43) and a reverse thread section of the second bidirectional screw (43) are respectively in threaded connection with the guide sliding blocks (44), an extension section of the second bidirectional screw (43) extending out of the base (1) is coaxially arranged with an output shaft of the second driving motor (41), and the second bidirectional screw (43) is rotatably connected with the base (1).
5. The building outer wall construction platform of claim 4, wherein the sliding member comprises two sliding blocks (48), a sliding groove (47) for the sliding blocks (48) to slide is formed in the bottom wall of the adjusting plate (2), the sliding groove (47) is arranged along the length direction of the sliding groove (36), the two sliding blocks (48) are located in the same sliding groove (36) and can slide along the sliding groove (36), and the extending section of the sliding block (48) extending out of the sliding groove (47) is rotatably connected with the adapter rod (45).
6. The building exterior wall construction platform according to claim 1, wherein two pressing plates (21) are arranged on the adjusting plate (2), the pressing plates (21) are arranged along the length direction of the sliding groove (36), and a limiting sliding groove (22) for the extending plate (31) to slide is formed in one side, close to each other, of the two pressing plates (21).
7. The building exterior wall construction platform according to claim 1, wherein at least two support plates (6) capable of abutting against the bottom wall of the extension plate (31) are rotatably connected to the side wall of the adjusting plate (2).
8. The building exterior wall construction platform according to claim 1, wherein a guard rail (5) is arranged on the adjusting plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023195012.4U CN214329795U (en) | 2020-12-25 | 2020-12-25 | Building outer wall construction platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023195012.4U CN214329795U (en) | 2020-12-25 | 2020-12-25 | Building outer wall construction platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214329795U true CN214329795U (en) | 2021-10-01 |
Family
ID=77902124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023195012.4U Expired - Fee Related CN214329795U (en) | 2020-12-25 | 2020-12-25 | Building outer wall construction platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214329795U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278072A (en) * | 2021-12-23 | 2022-04-05 | 通州建总集团有限公司 | Construction work platform for building engineering |
| CN115354837A (en) * | 2022-09-01 | 2022-11-18 | 中铁四局集团物资工贸有限公司阜阳分公司 | Civil engineering construction guardrail support |
-
2020
- 2020-12-25 CN CN202023195012.4U patent/CN214329795U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278072A (en) * | 2021-12-23 | 2022-04-05 | 通州建总集团有限公司 | Construction work platform for building engineering |
| CN115354837A (en) * | 2022-09-01 | 2022-11-18 | 中铁四局集团物资工贸有限公司阜阳分公司 | Civil engineering construction guardrail support |
| CN115354837B (en) * | 2022-09-01 | 2024-04-26 | 中铁四局集团有限公司 | Civil engineering construction guardrail support |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211001 |
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| CF01 | Termination of patent right due to non-payment of annual fee |