CN112779872A - Urban road sign for municipal works - Google Patents
Urban road sign for municipal works Download PDFInfo
- Publication number
- CN112779872A CN112779872A CN202110028949.2A CN202110028949A CN112779872A CN 112779872 A CN112779872 A CN 112779872A CN 202110028949 A CN202110028949 A CN 202110028949A CN 112779872 A CN112779872 A CN 112779872A
- Authority
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- China
- Prior art keywords
- fixedly connected
- movable
- indicating
- case
- storage tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 11
- 239000012535 impurity Substances 0.000 abstract description 10
- 229920003266 Leaf® Polymers 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
- E01F9/608—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of municipal engineering and discloses an urban road sign for municipal engineering, which comprises a sign board, wherein the upper end of the sign board is fixedly connected with a water storage tank, the side wall of the sign board is provided with an indication area, the indication area is provided with indication information, the bottom of the water storage tank is communicated with a water outlet pipe, the bottom of the water storage tank is symmetrically and fixedly connected with side plates relative to the sign board, the opposite side walls of the two side plates are symmetrically provided with movable grooves, the movable grooves are connected with movable blocks in a sliding manner, the opposite ends of the two movable blocks are fixedly connected with L-shaped movable plates, and the two movable plates are connected with a U-shaped cleaning frame through two fixing mechanisms. This urban road sign for municipal works can avoid artifical intensity of labour of clearance great automatically with impurity clearance such as adnexed dust on the instruction region, can be with the clean of the quick clearance in sign surface.
Description
Technical Field
The invention relates to the technical field of municipal engineering, in particular to an urban road sign for municipal engineering.
Background
Urban road sign mainly used instructs urban road information, provides information for motor vehicles and pedestrian in the highway section unfamiliar with, and in the construction process in modern city, almost every road is essential to have the sign of taking the way, and the road sign contains indicating information such as distance, place name, direction. The urban road sign has many uses, can be used for indicating passengers to take a bus route, and also can be used for indicating the running direction of a vehicle.
Because the both sides at the road are fixed in the installation of urban road sign, impurity such as dust often adheres to on the urban road sign, cause the instruction information of the instruction region on the urban road sign to be sheltered from by impurity such as dust. The existing urban road sign cannot automatically clear up attached dust on the indication area, the labor intensity of manual cleaning is large, and the sign surface cannot be cleaned up quickly.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the urban road sign for the municipal engineering, which has the advantages of automatically cleaning dust attached to the indication area, quickly cleaning the surface of the sign and the like, and solves the problems of high labor intensity and difficulty in cleaning the indication area of the sign manually.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a city road indicating board for municipal engineering comprises an indicating board, wherein a water storage tank is fixedly connected to the upper end of the indicating board, an indicating area is arranged on the side wall of the indicating board, indicating information is arranged on the indicating area, the bottom of the water storage tank is communicated with a water outlet pipe, side plates are symmetrically and fixedly connected to the bottom of the water storage tank about the indicating board, movable grooves are symmetrically formed in the opposite side walls of the two side plates, movable blocks are connected in the movable grooves in a sliding mode, L-shaped movable plates are fixedly connected to the opposite ends of the two movable blocks, the two movable plates are connected with a U-shaped cleaning frame through two fixing mechanisms, brushes are mounted on the side walls, close to the indicating board, of the indicating board and the bottoms of the two side plates, a case is fixedly connected together with the bottom of the indicating board and the walls of the movable grooves, be equipped with the screw hole in the movable block, the movable block passes through screw hole threaded connection on the threaded rod that corresponds, is located fixed the cover has connect the sprocket on the threaded rod pole wall of quick-witted incasement, two the sprocket passes through chain drive and connects, the motor is installed to the quick-witted bottom of the case, the output of motor passes through the shaft coupling and is connected with the one end of one of them threaded rod, quick-witted incasement install with motor electric connection's battery, the symmetrical fixedly connected with dead lever in clearance frame upper end, the other end fixedly connected with piston of dead lever, piston sliding connection is in a water pipe.
Preferably, fixed establishment includes fixed slot, fixed orifices, bolt and spring, the fixed slot is seted up on the fly leaf, the fixed orifices is seted up on the clearance frame of fixed slot one side, the one end of bolt is passed fixed orifices and fixed slot notch and is extended to the fixed slot, spring one end fixed connection is on the clearance frame, the other end fixed connection of spring is on the bolt, through a plurality of screwed connection between brush and the clearance frame.
Preferably, the bottom of the case is fixedly connected with a bottom plate, and through holes are formed in four corners of the bottom plate.
Preferably, a filter screen is fixedly connected in an upper end tank opening of the water storage tank, and the filter screen is made of stainless steel materials.
Preferably, reinforcing ribs are fixedly connected between the indicating plate and the case symmetrically about the indicating plate, and the cross section of each reinforcing rib is a right-angled triangle.
Preferably, the side wall of the movable plate is fixedly connected with limiting plates symmetrically about the cleaning frame, and the cleaning frame is arranged between the two limiting plates.
The invention has the advantages that:
1. the urban road sign board for municipal engineering is characterized in that the urban road sign board for municipal engineering is provided with a sign board, a water storage tank, an indication area, a water outlet pipe, a side plate, a movable groove, a movable block, a movable plate, a cleaning frame, a brush, a case, a threaded rod, a chain wheel, a motor, a battery, a fixed rod and a piston, when the impurities such as dust and the like attached to the indicating area need to be cleaned, the motor is started by connecting the electric energy of the battery, the brush brushes on the surface of the indicating plate, the fixed rod and the piston can be driven to move downwards while the cleaning frame moves downwards, the piston is separated from the water outlet pipe, rainwater stored in the water storage tank falls onto the brush and the indicating plate, the brush can scrub the indicating area, make cleaner of clearance, can avoid artifical intensity of labour of clearance great with impurity clearance such as adnexed dust on the instruction region automatically, can be with the clean of the quick clearance of sign surface.
2. This urban road sign for municipal works, through setting up fixed establishment, when needs are changed or are cleared up the brush, the motion in opposite directions is done to two bolts for the spring is stretched, and the end of inserting of bolt breaks away from in the fixed slot, can follow the clearance frame and take off between two fly leafs, and the dismantlement separation of the clearance frame of being convenient for and two fly leafs will be dismantled again to the screw on the clearance frame, makes clearance frame and brush separation, is convenient for clear up or change the brush.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be discussed below, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings can be obtained according to the embodiments shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an urban road sign for municipal works according to the present invention;
FIG. 2 is a schematic view of a connection structure of a cleaning frame and a brush of the urban road sign for municipal engineering provided by the invention;
fig. 3 is an enlarged view of a portion a in fig. 1.
In the figure: the device comprises an indicating plate 1, a water storage tank 2, an indicating area 3, a water outlet pipe 4, a side plate 5, a movable groove 6, a movable block 7, a movable plate 8, a fixing mechanism 9, a fixing groove 91, a fixing hole 92, a bolt 93, a spring 94, a cleaning frame 10, a brush 11, a chassis 12, a threaded rod 13, a chain wheel 14, a motor 15, a battery 16, a fixed rod 17, a piston 18, a bottom plate 19, a filter screen 20, a reinforcing rib 21 and a limiting plate 22.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood 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 described herein without the need for inventive work, are within the scope of the present invention.
Referring to fig. 1-3, an urban road sign for municipal works comprises a sign board 1, a water storage tank 2 is fixedly connected to the upper end of the sign board 1, an indication area 3 is arranged on the side wall of the sign board 1, indication information is arranged on the indication area 3, a water outlet pipe 4 is communicated with the bottom of the water storage tank 2, side plates 5 are symmetrically and fixedly connected to the bottom of the water storage tank 2 about the sign board 1, movable grooves 6 are symmetrically arranged on the opposite side walls of the two side plates 5, movable blocks 7 are slidably connected in the movable grooves 6, L-shaped movable plates 8 are fixedly connected to the opposite ends of the two movable blocks 7, the two movable plates 8 are connected with a U-shaped cleaning frame 10 through two fixing mechanisms 9, brushes 11 are arranged on the side wall of the cleaning frame 10 close to the sign board 1, a case 12 is fixedly connected to the bottoms of the two side plates 5, a threaded rod 13 is rotatably connected to the case 12 wall and, the movable block 7 is internally provided with a threaded hole, the movable block 7 is connected with a corresponding threaded rod 13 through the threaded hole, a chain wheel 14 is fixedly sleeved on the rod wall of the threaded rod 13 positioned in the case 12, the two chain wheels 14 are connected through chain transmission, a motor 15 is arranged at the bottom of the case in the case 12, the output end of the motor 15 is connected with one end of one of the threaded rods 13 through a coupling, a battery 16 electrically connected with the motor 15 is arranged in the case 12, a fixed rod 17 is symmetrically and fixedly connected with the upper end of the cleaning frame 10, the other end of the fixed rod 17 is fixedly connected with a piston 18, the piston 18 is connected in the water outlet pipe 4 in a sliding manner, when impurities such as dust and the like attached to the indicating area 3 need to be cleaned, the motor 15 is started by accessing the electric energy of the battery 16, the motor 15 drives the threaded rod 13 and the chain wheel 14 to rotate forwardly, so, because brush 11 sets up the one side at instruction region 3, and fly leaf 8 drives clearance frame 10 downstream, brush 11 brushes on 1 surface of indicator board, and when clearance frame 10 downstream, can drive dead lever 17 and piston 18 downstream, piston 18 breaks away from in the outlet pipe 4, the rainwater of storing in the storage water tank 2 flows down on brush 11 and indicator board 1, brush 11 can scrub instruction region 3, make cleaner of clearance, can be automatic with instructing impurity clearance such as regional 3 upper adnexed dust, the intensity of labour who avoids artifical clearance is great, can be with the clean of the quick clearance in sign surface.
The fixing mechanism 9 comprises a fixing groove 91, a fixing hole 92, a bolt 93 and a spring 94, the fixing groove 91 is arranged on the movable plate 8, the fixing hole 92 is arranged on the cleaning frame 10 at one side of the fixing groove 91, one end of the bolt 93 passes through the fixing hole 92 and a notch of the fixing groove 91 and extends into the fixing groove 91, one end of the spring 94 is fixedly connected on the cleaning frame 10, the other end of the spring 94 is fixedly connected on the bolt 93, the brush 11 is connected with the cleaning frame 10 through a plurality of screws, when the brush 11 needs to be replaced or cleaned, the two latches 93 move toward each other, so that the spring 94 is stretched, and the insertion end of the latch 93 is disengaged from the fixing groove 91, the cleaning frame 10 can be taken down from between the two movable plates 8, so that the cleaning frame 10 is detached from the two movable plates 8 conveniently, and the screws on the cleaning frame 10 are detached, so that the cleaning frame 10 is separated from the brush 11, and the brush 11 is convenient to clean or replace.
Fixedly connected with filter screen 20 in the upper end case mouth of storage water tank 2, filter screen 20 can block impurity and get into storage water tank 2 in, filter screen 20 is made by stainless steel material, prevents that filter screen 20 from rustting.
The reinforcing ribs 21 are fixedly connected between the indicating plate 1 and the case 12 in a symmetrical mode about the indicating plate 1, the cross sections of the reinforcing ribs 21 are right-angled triangles, and the connecting strength of the indicating plate 1 and the case 12 is improved.
On the lateral wall of the movable plate 8, limiting plates 22 are symmetrically and fixedly connected to the cleaning frame 10, and the cleaning frame 10 is disposed between the two limiting plates 22, so that the cleaning frame 10 can be limited, and the bolt 93 can be conveniently inserted into the fixing hole 92 and the fixing groove 91.
To sum up, when impurities such as dust and the like attached to the indication area 3 need to be cleaned, the motor 15 is started by being connected with electric energy of the battery 16, the motor 15 drives the threaded rod 13 and the chain wheel 14 to rotate forward, so that the movable block 7 moves downwards on the corresponding threaded rod 13, and the two movable plates 8 are driven to move downwards, because the brush 11 is arranged at one side of the indication area 3, and the movable plates 8 drive the cleaning frame 10 to move downwards, the brush 11 brushes on the surface of the indication plate 1, and the cleaning frame 10 moves downwards, and simultaneously drives the fixed rod 17 and the piston 18 to move downwards, the piston 18 is separated from the water outlet pipe 4, rainwater stored in the water storage tank 2 falls onto the brush 11 and the indication plate 1, the brush 11 can scrub the indication area 3, so that the cleaning is cleaner, impurities such as dust and the like attached to the indication area 3 can be automatically cleaned, and the labor intensity of manual cleaning is avoided to be large, the surface of the indication board can be quickly cleaned; when the brush 11 needs to be replaced or cleaned, the two bolts 93 move in opposite directions, so that the spring 94 is stretched, the insertion ends of the bolts 93 are separated from the fixing groove 91, the cleaning frame 10 can be taken down from between the two movable plates 8, the cleaning frame 10 is convenient to detach from the two movable plates 8, the screws on the cleaning frame 10 are detached, the cleaning frame 10 is convenient to detach from the brush 11, and the brush 11 is convenient to clean or replace.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a city road sign for municipal works, includes indicator board (1), its characterized in that: the indicating device is characterized in that a water storage tank (2) is fixedly connected to the upper end of the indicating plate (1), an indicating area (3) is arranged on the side wall of the indicating plate (1), indicating information is arranged on the indicating area (3), a water outlet pipe (4) is communicated with the bottom of the water storage tank (2), side plates (5) are symmetrically and fixedly connected to the bottom of the water storage tank (2) about the indicating plate (1), movable grooves (6) are symmetrically formed in the opposite side walls of the two side plates (5), movable blocks (7) are connected in the movable grooves (6) in a sliding mode, L-shaped movable plates (8) are fixedly connected to the opposite ends of the two movable blocks (7), U-shaped cleaning frames (10) are connected to the two movable plates (8) through two fixing mechanisms (9), brushes (11) are installed on the side walls, close to the indicating plate (1), and a case (12) is fixedly connected to the bottoms of the indicating plate (1) and the two side, the novel cleaning machine is characterized in that a threaded rod (13) is connected to the wall of the case (12) and the wall of the movable groove (6) in a rotating mode through two bearings, a threaded hole is formed in the movable block (7), the movable block (7) is connected to the corresponding threaded rod (13) through a threaded hole in a threaded mode, a chain wheel (14) is fixedly sleeved on the wall of the threaded rod (13) in the case (12), the chain wheel (14) is connected through chain transmission, a motor (15) is installed at the bottom of the case in the case (12), the output end of the motor (15) is connected with one end of one of the threaded rods (13) through a coupler, a battery (16) electrically connected with the motor (15) is installed in the case (12), fixing rods (17) are symmetrically and fixedly connected to the upper end of the cleaning frame (10), and pistons (18) are fixedly connected to the, the piston (18) is connected in the water outlet pipe (4) in a sliding way.
2. The city road signboard for municipal engineering according to claim 1, wherein: fixed establishment (9) include fixed slot (91), fixed orifices (92), bolt (93) and spring (94), set up on fly leaf (8) fixed slot (91), set up on clearance frame (10) of fixed slot (91) one side fixed orifices (92), the one end of bolt (93) is passed fixed orifices (92) and fixed slot (91) notch and is extended to fixed slot (91) interior, spring (94) one end fixed connection is on clearance frame (10), the other end fixed connection of spring (94) is on bolt (93), through a plurality of screwed connection between brush (11) and clearance frame (10).
3. The city road signboard for municipal engineering according to claim 1, wherein: the bottom of the case (12) is fixedly connected with a bottom plate (19), and through holes are formed in four corners of the bottom plate (19).
4. The city road signboard for municipal engineering according to claim 1, wherein: a filter screen (20) is fixedly connected in the upper end tank opening of the water storage tank (2), and the filter screen (20) is made of stainless steel materials.
5. The city road signboard for municipal engineering according to claim 1, wherein: the cross section of the reinforcing rib (21) is a right-angled triangle, and the reinforcing rib (21) is symmetrically and fixedly connected with the indicating plate (1) between the indicating plate (1) and the case (12).
6. The city road signboard for municipal engineering according to claim 2, wherein: the side wall of the movable plate (8) is symmetrically and fixedly connected with limiting plates (22) relative to the cleaning frame (10), and the cleaning frame (10) is arranged between the two limiting plates (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110028949.2A CN112779872A (en) | 2021-01-11 | 2021-01-11 | Urban road sign for municipal works |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110028949.2A CN112779872A (en) | 2021-01-11 | 2021-01-11 | Urban road sign for municipal works |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112779872A true CN112779872A (en) | 2021-05-11 |
Family
ID=75756403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110028949.2A Pending CN112779872A (en) | 2021-01-11 | 2021-01-11 | Urban road sign for municipal works |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112779872A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855665A (en) * | 2022-05-07 | 2022-08-05 | 中煤第三建设（集团）有限责任公司 | Warning device is used in construction engineering construction |
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| CN206697144U (en) * | 2017-05-09 | 2017-12-01 | 范瑞宁 | A kind of municipal administration direction board for being easy to cleaning |
| CN108039116A (en) * | 2017-12-27 | 2018-05-15 | 郑州国知网络技术有限公司 | A kind of direction board of municipal construction easy to cleaning |
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| CN208488903U (en) * | 2018-06-01 | 2019-02-12 | 田岗 | A kind of town road environment-friendly and energy-efficient warning sign easy to clean |
| CN109582088A (en) * | 2018-12-03 | 2019-04-05 | 钟家明 | A kind of computer display screen easy to use |
| CN111069131A (en) * | 2020-01-06 | 2020-04-28 | 张俊鹏 | Solar photovoltaic board dust cleaning device |
| CN210561813U (en) * | 2019-02-26 | 2020-05-19 | 崔秀阳 | Multifunctional highway speed limit safety warning board |
| CN111335205A (en) * | 2020-03-26 | 2020-06-26 | 施卫平 | Self-cleaning type highway sign |
| CN211447389U (en) * | 2019-12-04 | 2020-09-08 | 王颖 | Curtain wall solar energy convenient to clean |
| CN212270751U (en) * | 2020-03-24 | 2021-01-01 | 周生虎 | Road reflector for municipal administration |
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2021
- 2021-01-11 CN CN202110028949.2A patent/CN112779872A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206697144U (en) * | 2017-05-09 | 2017-12-01 | 范瑞宁 | A kind of municipal administration direction board for being easy to cleaning |
| CN108039116A (en) * | 2017-12-27 | 2018-05-15 | 郑州国知网络技术有限公司 | A kind of direction board of municipal construction easy to cleaning |
| CN108543727A (en) * | 2018-03-22 | 2018-09-18 | 深圳市贝优通新能源技术开发有限公司 | A kind of wide-angle lens with long service life that the clarity based on Internet of Things is high |
| CN208488903U (en) * | 2018-06-01 | 2019-02-12 | 田岗 | A kind of town road environment-friendly and energy-efficient warning sign easy to clean |
| CN109582088A (en) * | 2018-12-03 | 2019-04-05 | 钟家明 | A kind of computer display screen easy to use |
| CN210561813U (en) * | 2019-02-26 | 2020-05-19 | 崔秀阳 | Multifunctional highway speed limit safety warning board |
| CN211447389U (en) * | 2019-12-04 | 2020-09-08 | 王颖 | Curtain wall solar energy convenient to clean |
| CN111069131A (en) * | 2020-01-06 | 2020-04-28 | 张俊鹏 | Solar photovoltaic board dust cleaning device |
| CN212270751U (en) * | 2020-03-24 | 2021-01-01 | 周生虎 | Road reflector for municipal administration |
| CN111335205A (en) * | 2020-03-26 | 2020-06-26 | 施卫平 | Self-cleaning type highway sign |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114855665A (en) * | 2022-05-07 | 2022-08-05 | 中煤第三建设（集团）有限责任公司 | Warning device is used in construction engineering construction |
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Application publication date: 20210511 |
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| RJ01 | Rejection of invention patent application after publication |