CN111946142A - Rail guard that construction outer wall was used - Google Patents
Rail guard that construction outer wall was used Download PDFInfo
- Publication number
- CN111946142A CN111946142A CN202010874751.1A CN202010874751A CN111946142A CN 111946142 A CN111946142 A CN 111946142A CN 202010874751 A CN202010874751 A CN 202010874751A CN 111946142 A CN111946142 A CN 111946142A
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- Prior art keywords
- movably connected
- outer side
- connecting rod
- fixedly connected
- rod
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/1413—Post-and-rail fences, e.g. without vertical cross-members
- E04H17/1417—Post-and-rail fences, e.g. without vertical cross-members with vertical cross-members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
- E04H17/22—Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/26—Devices for erecting or removing fences
- E04H17/261—Devices for erecting or removing fences for post and wire handling
- E04H17/263—Devices for erecting or removing fences for post and wire handling for erecting posts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/04—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention relates to the technical field of building outer wall construction, and discloses a protective guard for building outer wall construction, which comprises a shell, wherein a main board is fixedly connected inside the shell; utilize the nature of cutting magnetic induction line principle and electro-magnet, the function condition to the device is controlled, trigger subsequent guardrail and lay operation and fixed operation, increase linkage between the structure, it is more convenient to make the operation, higher degree of automation has, expand the curb plate automatically, make the guardrail take place the diffusion, lay automatically, reduce the manpower and pay out, reduce working strength, effectively save time, work efficiency is higher, and shrink automatically under the condition that needs were dismantled, conveniently carry, through the cone pulley, the combined action of third gear and drilling rod, drilling tool autogiration bores into subaerially, consolidate whole device, increase the stability of its setting, can effectively reduce its probability that receives human factor or natural factor and empty, more accord with the in-service use condition.
Description
Technical Field
The invention relates to the technical field of building outer wall construction, in particular to a protective guard for building outer wall construction.
Background
In the building construction process, in order to warn outside personnel and prevent the personnel from entering a construction site, the life safety of the construction personnel is guaranteed, and the workers can construct the building more safely, a protective fence is generally required to be arranged on the outer wall of the building. Most structures of common protective guards are fixed, the protective guards are connected through bolts and nuts, the scattered protective guards are required to be transferred to a construction site in general for convenience in carrying, the protective guards are installed on the site, multiple people are required to cooperate, the construction efficiency is low, time and labor are wasted, the installation or the disassembly cannot be completed quickly, and the operation is inconvenient. Meanwhile, when the existing protective guard is used, the situation that the existing protective guard is not tightly connected with the ground easily occurs, the setting stability of the protective guard is poor, the protective guard is easily influenced by human factors or natural factors to cause the situation of toppling, and therefore the protective guard has certain safety problems, loses the protection effect and is not beneficial to normal use of the protective guard.
Aiming at the defects of the prior art, the invention provides a protective guard for building outer wall construction, which has the advantages of automatic laying, high stability and convenient operation, solves the problems of inconvenient operation and poor stability, controls the operation condition of the device by utilizing the principle of cutting magnetic induction lines and the property of an electromagnet, triggers the subsequent laying operation and fixing operation of the protective guard, automatically expands side plates, diffuses the protective guard, automatically lays, reduces labor payment, reduces working strength, effectively saves time, has higher working efficiency, automatically shrinks under the condition of needing to be disassembled, is convenient to carry, simultaneously automatically and rotatably drills into the ground by a drilling tool, reinforces the whole device, increases the setting stability of the device, effectively reduces the probability of toppling over caused by human factors or natural factors, and better conforms to the actual use condition, has high automation degree.
Disclosure of Invention
Technical scheme (I)
In order to realize the purposes of automatic laying, high stability and convenient operation, the invention provides the following technical scheme: the protective guard for the construction of the building outer wall comprises a shell, a main board, a copper bar, a magnetic pole group, a first gear, a connecting rod group, a side plate, a rotating plate, an electromagnet, a rotating frame, a second gear, a ratchet wheel, a cone pulley, a third gear and a drill rod.
Wherein:
the position and connection relationship among the structures are as follows:
a protective guard for building exterior wall construction comprises a shell, wherein a clamping column is fixedly connected to the surface of the shell, a main board is fixedly connected to the interior of the shell, a pressing rod is fixedly connected to the bottom of the main board, a spring is movably connected to the outer side of the pressing rod, a pressing frame is movably connected to the bottom of the spring, a magnetic pole group is fixedly connected to the top of the pressing frame, a copper bar is fixedly connected to the bottom of the main board, the copper bar is electrically connected with an electromagnet, a magnetic pole group is movably connected to the outer side of the copper bar and comprises an N pole block and an S pole block, a first gear is movably connected to the outer side of the main board, the first gear is provided with two gears with the same specification, a first toothed wheel is movably connected to the outer side of the first gear, the two first toothed wheels are same in size, a connecting rod group is movably connected to the outer side of the main board and comprises a, one side of the first connecting rod, which is far away from the first toothed wheel, is movably connected with the second connecting rod, the second toothed wheel is fixedly connected with the outer side of the second connecting rod, the outer side of the joint of the first connecting rod and the second connecting rod is movably connected with a third connecting rod, and one side of the two third connecting rods, which is far away from the joint, is respectively movably connected with the first connecting rod on the outer side of the first toothed wheel on the upper side and the second connecting rod on the outer side of the second toothed wheel on.
The outer side of the main board is movably connected with a side board, the outer side of the side board is movably connected with a second toothed wheel and a first toothed wheel, the bottom of the side board is movably connected with a roller, the outer side of the main board is movably connected with a rotating board, the rotating board is provided with two rotating boards with the same specification, the outer side of the rotating board is movably connected with a pull rope, one side of the pull rope far away from the rotating board is movably connected with a spring, the inner part of the shell is fixedly connected with an electromagnet, the outer side of the electromagnet is fixedly connected with a supporting board, the left side of the supporting board is fixedly connected with a semicircular arc strip, the outer side of the supporting board is movably connected with an inverted T-shaped rod, the right side of the electromagnet is movably connected with a rotating frame, the rotating frame is composed of a round frame and a straight tube, the straight tube is movably connected with an I-shaped rod, the below swing joint of ratchet has the cone pulley, and the outside swing joint of cone pulley has the cone pulley, and the bottom fixedly connected with screw rod of cone pulley, the left side swing joint of screw rod have the third gear, and the left side swing joint of cone pulley has the third gear, and the bottom fixedly connected with drilling rod of third gear, drilling rod comprise rotary column and drilling tool, and wavy channel has been seted up on the surface of rotary column.
(II) advantageous effects
Compared with the prior art, the invention provides a protective guard for building outer wall construction, which has the following beneficial effects:
1. this rail guard that building outer wall construction was used, through the combined action of shell, mainboard, bar copper, magnetic pole group, electro-magnet, commentaries on classics frame, second gear and ratchet, utilize the nature of cutting magnetic induction line principle and electro-magnet, control the function condition of device, trigger subsequent guardrail and lay operation and fixed operation, increase the linkage nature between the structure, make the operation more convenient, have higher degree of automation.
2. This rail guard that building outer wall construction was used, through the combined action of first gear, linkage, curb plate and commentaries on classics board, expand the curb plate automatically, make the guardrail take place the diffusion, lay automatically, reduce the manpower and pay out, reduce working strength, effectively save time, work efficiency is higher to contract automatically under the condition that needs were dismantled, conveniently carry.
3. This rail guard that building outer wall construction was used, through the combined action of cone pulley, third gear and drilling rod, the drilling tool autogiration bores into the underground, consolidates whole device, increases the stability of its setting, can effectively reduce its probability that receives human factor or natural factor and topple over, more accords with the actual use condition.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the connection between the electromagnet and the ratchet wheel according to the present invention;
fig. 4 is a schematic view of the connection relationship between the rotating frame and the second gear.
In the figure: 1. a housing; 2. a main board; 3. a copper bar; 4. a magnetic pole group; 5. a first gear; 6. a linkage; 7. a side plate; 8. rotating the plate; 9. an electromagnet; 10. frame turning; 11. a second gear; 12. a ratchet wheel; 13. a cone pulley; 14. a third gear; 15. and (5) drilling a rod.
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, a protective guard for building exterior wall construction comprises a housing 1, a fastening column fixedly connected to the surface of the housing 1, a main board 2 fixedly connected to the inside of the housing 1, a pressing rod fixedly connected to the bottom of the main board 2, a spring movably connected to the outside of the pressing rod, a pressing frame movably connected to the bottom of the spring, a magnetic pole group 4 fixedly connected to the top of the pressing frame, a copper rod 3 fixedly connected to the bottom of the main board 2, the copper rod 3 electrically connected to an electromagnet 9, an insulating block fixedly connected to the outside of the copper rod 3, the copper rod 3 fixedly connected to the main board 2 through the insulating block, the copper rod 3 located between an N pole block and an S pole block of the magnetic pole group 4, a magnetic pole group 4 movably connected to the outside of the copper rod 3, the magnetic pole group 4 composed of an N pole block and an S pole block, a first gear 5 movably connected to the outside of the main board 2, two first gears 5 having the same specification, two first gears 5, the outer side of the first gear 5 is movably connected with a first toothed wheel, the size of the first toothed wheel is matched with that of the first gear 5, the number of the first toothed wheels is two, the size of the first toothed wheels is the same, and the outer side of the first gear 5 is fixedly connected with a rotating shaft.
The outer side of the main board 2 is movably connected with a connecting rod group 6, the connecting rod group 6 is composed of a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is fixedly connected with a first toothed wheel, one side of the first connecting rod, which is far away from the first toothed wheel, is movably connected with the second connecting rod, the outer side of the second connecting rod is fixedly connected with a second toothed wheel, the outer side of the joint of the first connecting rod and the second connecting rod is movably connected with a third connecting rod, one side of the two third connecting rods, which is far away from the joint, is respectively movably connected with the first connecting rod on the outer side of the first toothed wheel on the upper side and the second connecting rod on the outer side of the second toothed wheel on the lower side, the outer side of the main board 2 is movably connected with a side board 7, the outer side of the side board 7 is movably connected with the second toothed wheel and the first toothed wheel, the second toothed wheel on, the outside swing joint of commentaries on classics board 8 has the stay cord, and one side swing joint that commentaries on classics board 8 was kept away from to the stay cord has the spring, and its stay cord swing joint is in the outside of first gear 5 pivot, and during the beginning, the spring in commentaries on classics board 8 stay cord outside is in tensile state, changes the outside fixedly connected with pivot of board 8.
The electromagnet 9 is fixedly connected inside the shell 1, a support plate is fixedly connected on the outer side of the electromagnet 9, the support plate is made of insulating materials, a semicircular arc strip is fixedly connected on the left side of the support plate, an inverted T-shaped rod is movably connected on the outer side of the support plate, a through groove is formed in the surface of the support plate, the size of the through groove is matched with that of a cross rod of the inverted T-shaped rod, a spring is movably connected on the outer side of a vertical rod of the inverted T-shaped rod, one side, away from the vertical rod, of the spring is movably connected with the support plate, the vertical rod is made of metal materials, a rotating frame 10 is movably connected on the right side of the electromagnet 9, the rotating frame 10 is composed of a round frame and a straight pipe, an I-shaped rod is movably connected in the straight pipe, the spring is movably connected on the outer side of the I-shaped rod body, a limiting plate is fixedly connected on, the outer side of the inverted Z-shaped rod diagonal rod is movably connected with a spring plate.
A second gear 11 is movably connected inside the rotating frame 10, a first brace is movably connected on the outer side of the second gear 11, one side of the first brace far away from the second gear 11 is movably connected with the rotating shafts of the two rotating plates 8, a ratchet wheel 12 is movably connected on the outer side of the rotating frame 10, a conical wheel 13 is movably connected below the ratchet wheel 12, a conical wheel is movably connected on the outer side of the conical wheel 13, the size of the conical wheel is matched with that of the conical wheel 13, a screw rod is fixedly connected at the bottom of the conical wheel, a third gear 14 is movably connected on the left side of the screw rod, the size of the third gear 14 is matched with that of the third gear 14, a second brace is movably connected on the outer side of the conical wheel 13, one side of the second brace far away from the conical wheel 13 is movably connected with the circular frame of the rotating frame 10, a third gear 14 is movably connected on the left side of the conical wheel 13, a connecting rod is fixedly connected at the bottom of the third, the bottom of the third gear 14 is fixedly connected with a drill rod 15, the drill rod 15 is composed of a rotary column and a drilling tool, the surface of the rotary column is provided with a wavy channel, and the size of the wavy channel is matched with the size of a clamping column outside the shell 1.
The working process and the principle of the device are as follows:
during the use, press device downwards, the gyro wheel that makes 7 bottoms of curb plate contacts with ground, and the underframe and the ground of 2 bottoms of mainboard contact, support mainboard 2 and shell 1, 2 moves down the depression bar that drives its bottom and bar copper 3 contact, the spring in its outside of depression bar extrusion, bar copper 3 moves to between the N utmost point piece and the S utmost point piece of magnetic pole group 4, cut and produce the electric current to the magnetic field between N utmost point piece and the S utmost point piece, energize for electro-magnet 9, make it produce magnetism.
The electromagnet 9 attracts the inverted T-shaped rod on the outer side of the inverted T-shaped rod, so that the inverted T-shaped rod moves leftwards along the through groove of the support plate and is far away from the rotary frame 10, initially, the rotary frame 10 is in a static state, the upper cross rod of the inverted Z-shaped rod on the outer side is tightly attached to the outer side of the cross rod of the inverted T-shaped rod, the inclined rod of the inverted T-shaped rod extrudes the elastic sheet on the outer side, the lower cross rod of the inclined, the rotating frame 10 drives the second gear 11 to rotate through the H-shaped rod in the straight pipe, the subsequent rotating frame 10 drives the H-shaped rod to be far away from the semicircular arc strip, the H-shaped rod is far away from the second gear 11 under the action of the spring on the outer side of the H-shaped rod, at the moment, the second gear 11 does not rotate along with the rotating frame 10 any more, the second gear 11 is caused to intermittently rotate by one hundred and eighty degrees, and the second gear 11 drives the rotating shaft of the rotating plate 8 to synchronously rotate through the first pull strip.
The two rotating plates 8 rotate one hundred eighty degrees to release the pull rope on the outer side of the rotating plates, the pull rope is stretched under the action of a spring on the outer side of the pull rope, the rotating shaft of the first gear 5 is driven to rotate while the pull rope moves, so that the first gear 5 on the lower side rotates anticlockwise, the first gear 5 on the upper side rotates clockwise, the two first gears 5 are meshed with the first toothed wheel on the outer side of the first gears to drive the first gears to rotate, the connecting rod group 6 comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is fixedly connected with the first toothed wheel, one side of the first connecting rod, far away from the first toothed wheel, is movably connected with the second connecting rod, the outer side of the second connecting rod is fixedly connected with the second toothed wheel, the third connecting rod is movably connected with the outer side of the first connecting rod and the second connecting rod, far away from the connecting positions of the third connecting rods, is respectively movably, the outer side of the side plate 7 is movably connected with a second toothed wheel and a first toothed wheel, the second toothed wheel on the outer side of the side plate is meshed with the first toothed wheel, the bottom of the side plate is movably connected with a roller, the first toothed wheel drives a first connecting rod on the outer side of the first toothed wheel to rotate, the first connecting rod pushes the side plate 7 to move rightwards through a second connecting rod and drives the second toothed wheel to rotate at the joint of the second toothed wheel and the side plate 7, the first connecting rod and the second connecting rod move through a third connecting rod between pull ropes, the movement mobility of the first connecting rod and the second connecting rod is increased, the side plate 7 smoothly moves rightwards on the ground through the roller on the bottom, the distance between the side plate 7 and the main.
Meanwhile, the circular frame of the rotating frame 10 drives the cone pulley 13 to rotate through the second pull rope, the cone pulley 13 is meshed with the cone pulley on the outer side of the cone pulley to drive the cone pulley to synchronously rotate, the cone pulley drives the screw rod on the bottom to rotate, the screw rod is meshed with the third gear 14 to drive the third gear to rotate, the third gear 14 drives the drill rod 15 to rotate through the connecting rod, as the drill rod 15 consists of a rotating column and a drilling tool, the surface of the rotating column is provided with a wavy channel, the size of the wavy channel is matched with the size of a clamping column on the outer side of the shell 1, so that the rotating column of the drill rod 15 is blocked by the clamping column on the outer side of the shell 1, initially, the drill rod 15 is located at the highest point, the clamping column is located in a chute facing obliquely above the wavy channel of the rotating column of the drill rod 15, the channel facing obliquely above the rotating column of the drill rod 15 is far away from the clamping column, the drill rod, the drill of the drill rod 15 is rotated to move downwards to the ground, and the stability of the device is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a rail guard that construction of building outer wall was used, includes shell (1), its characterized in that: the inner part of the shell (1) is fixedly connected with a main board (2), the bottom of the main board (2) is fixedly connected with a copper bar (3), the outer side of the copper bar (3) is movably connected with a magnetic pole group (4), the outer side of the main board (2) is movably connected with a first gear (5), the outer side of the main board (2) is movably connected with a connecting rod group (6), the outer side of the main board (2) is movably connected with a side plate (7), the outer side of the main board (2) is movably connected with a rotating plate (8), the inner part of the shell (1) is fixedly connected with an electromagnet (9), the right side of the electromagnet (9) is movably connected with a rotating frame (10), the inner part of the rotating frame (10) is movably connected with a second gear (11), the outer side of the rotating frame (10) is movably connected with a ratchet wheel (12), the lower part of the ratchet wheel (12), the bottom of the third gear (14) is fixedly connected with a drill rod (15).
2. The guard rail for construction of an external wall of a building of claim 1, wherein: the fixed surface of shell (1) is connected with the card post, the bottom fixedly connected with depression bar of mainboard (2), and the outside swing joint of depression bar has the spring, and the bottom swing joint of spring has the pressure frame, presses top fixedly connected with magnetic pole group (4) of frame, and bar copper (3) are connected with electro-magnet (9) electricity, and magnetic pole group (4) comprise N utmost point piece and S utmost point piece.
3. The guard rail for construction of an external wall of a building of claim 1, wherein: the two first gears (5) are of the same specification, the outer side of each first gear (5) is movably connected with a first toothed wheel, the two first toothed wheels are of the same size, the connecting rod group (6) is composed of a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is fixedly connected with the first toothed wheel, one side, away from the first toothed wheel, of the first connecting rod is movably connected with the second connecting rod, the outer side of the second connecting rod is fixedly connected with a second toothed wheel, the outer side of the joint of the first connecting rod and the second connecting rod is movably connected with the third connecting rod, and one side, away from the joint of the first connecting rod and the third connecting rod is movably connected with the first connecting rod on the outer side of the first toothed wheel on the upper side and the.
4. The guard rail for construction of an external wall of a building of claim 1, wherein: the outer side of the side plate (7) is movably connected with a second toothed wheel and a first toothed wheel, the bottom of the side plate is movably connected with idler wheels, the number of the rotating plates (8) is two, the specifications of the rotating plates are the same, the outer side of each rotating plate (8) is movably connected with a pull rope, and one side, far away from the rotating plates (8), of each pull rope is movably connected with a spring.
5. The guard rail for construction of an external wall of a building of claim 1, wherein: a support plate is fixedly connected to the outer side of the electromagnet (9), a semicircular arc strip is fixedly connected to the left side of the support plate, and an inverted T-shaped rod is movably connected to the outer side of the support plate.
6. The guard rail for construction of an external wall of a building of claim 1, wherein: the rotary frame (10) is composed of a circular frame and a straight pipe, an I-shaped rod is movably connected in the straight pipe, a second gear (11) is movably connected in the circular frame, and an inverted Z-shaped rod is movably connected to the outer side of the circular frame of the rotary frame (10).
7. The guard rail for construction of an external wall of a building of claim 1, wherein: the outer side of the cone pulley (13) is movably connected with a cone pulley, the bottom of the cone pulley is fixedly connected with a screw rod, the left side of the screw rod is movably connected with a third gear (14), a drill rod (15) is composed of a rotary column and a drilling tool, and the surface of the rotary column is provided with a wavy channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874751.1A CN111946142A (en) | 2020-08-27 | 2020-08-27 | Rail guard that construction outer wall was used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874751.1A CN111946142A (en) | 2020-08-27 | 2020-08-27 | Rail guard that construction outer wall was used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111946142A true CN111946142A (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010874751.1A Pending CN111946142A (en) | 2020-08-27 | 2020-08-27 | Rail guard that construction outer wall was used |
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| Country | Link |
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| CN (1) | CN111946142A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112900259A (en) * | 2021-01-28 | 2021-06-04 | 深圳市金鑫华建设集团有限公司 | Bridge greening guardrail structure convenient to replace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900259A (en) * | 2021-01-28 | 2021-06-04 | 深圳市金鑫华建设集团有限公司 | Bridge greening guardrail structure convenient to replace |
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Application publication date: 20201117 |