CN112227243A - Safety warning device for road and bridge construction and use method - Google Patents
Safety warning device for road and bridge construction and use method Download PDFInfo
- Publication number
- CN112227243A CN112227243A CN202011130527.8A CN202011130527A CN112227243A CN 112227243 A CN112227243 A CN 112227243A CN 202011130527 A CN202011130527 A CN 202011130527A CN 112227243 A CN112227243 A CN 112227243A
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- Prior art keywords
- frame body
- safety warning
- lower frame
- warning device
- locking
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- 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
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- 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
- E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
- E01F9/65—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection with rotatable, swingable or adjustable signs or signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The invention provides a safety warning device for road and bridge construction and a using method thereof, relating to the technical field of safety warning devices and comprising an upper frame body and a lower frame body, wherein the upper frame body is hinged with the lower frame body; the lower frame body is provided with a storage battery through a damping locking piece and an installation frame; the lower frame body outside the storage battery is symmetrically provided with grooves, supporting legs are arranged in the grooves through damping locking pieces, and the supporting legs are connected with the lower frame body through folding supporting rods. The safety warning device is convenient to fold and store through the mutual matching of the upper frame body, the lower frame body, the locking mechanism, the supporting legs and the folding support rods; can change safety warning words at will through the display screen, solve the problem that current safety warning sign used the limitation.
Description
Technical Field
The invention relates to the technical field of safety warning devices, in particular to a safety warning device for road and bridge construction and a using method of the safety warning device.
Background
In the maintenance of roads or bridges, damaged pavements or bridges are often required to be maintained, motor cars are often driven to pass through at a maintenance construction site, and warning signs are generally arranged at a short distance from the construction site to remind vehicles coming and going to pay attention to safety in order to protect the safety of construction personnel.
In the traditional warning device, a warning board is arranged to remind passing vehicles of paying attention to safety, most warning boards print warning signs on the surface of the warning board, different warning boards are required to be used in different places in the road construction process, and the warning signs of the existing warning boards are printed and are difficult to change; when different roads are constructed, a plurality of warning boards are required to be carried for different sections, so that the use limitation of the warning boards is caused; although the existing warning board is light in weight, the existing warning board is large in size, occupies a large transportation space in the transportation process, and is inconvenient for vehicle transportation and manual carrying, so that the existing warning board needs to be improved.
Disclosure of Invention
The invention aims to provide a safety warning device for road and bridge construction and a using method thereof, wherein the safety warning device is simple in structure and convenient to use, and solves the problems that a warning board in the prior art is large in using limitation, large in occupied transportation space and inconvenient to transport and carry by vehicles.
The technical scheme adopted by the invention is as follows: the utility model provides a safety warning device for road and bridge construction, includes framework and lower framework, its characterized in that: the upper frame body is hinged with the lower frame body, a display screen is arranged on the upper frame body through symmetrically arranged damping locking pieces, a controller is arranged on the upper frame body below the display screen, alarm lamps are arranged on the upper frame body on two sides of the controller, and a locking mechanism is arranged in the upper frame body outside the alarm lamps; the lower frame body is provided with an installation frame through a damping locking piece, a storage battery is fixedly installed on the installation frame, and the controller is electrically connected with the storage battery, the alarm lamp and the display screen; the lower frame body outside the storage battery is symmetrically provided with grooves, supporting legs are arranged in the grooves through damping locking pieces, and the supporting legs are connected with the lower frame body through folding supporting rods.
Furthermore, a handle is arranged on the upper frame body.
Furthermore, lock rings are symmetrically arranged on two sides of the upper frame body, lock catches are symmetrically arranged on two sides of the lower frame body, and the lock rings of the upper frame body are matched and locked with the lock catches of the lower frame body.
Furthermore, the front end and the rear end of the display screen are respectively provided with a solar cell panel, the solar cell panel is movably connected with the upper frame body through a damping locking piece, and the solar cell panel is electrically connected with the storage battery.
Further, the controller comprises a controller body, a processor module, a display module, an adjusting module, a storage module, a power switch and an adjusting button, wherein the controller body is provided with the power switch, the adjusting button is arranged on the controller body on one side of the power switch, the processor module, the display module, the adjusting module and the storage module are arranged in the controller body, and the processor module is respectively electrically connected with the display module, the adjusting module, the storage module, the power switch and the adjusting button.
Furthermore, the lower frame body of mounting bracket both sides on be provided with the stopper, the stopper is contradicted with the mounting bracket and is connected.
Furthermore, the locking mechanism comprises a locking rod, a clamping groove for mounting the locking rod and a spring, the clamping groove is arranged on the upper frame body, the locking rod is mounted in the clamping groove through the spring, a guide hole is formed in the lower frame body corresponding to one end of the locking rod, one end of the locking rod penetrates through the guide hole and extends to the outer side, a guide handle is mounted on the locking rod, one end of the guide handle extends out of the clamping groove, and the guide handle is matched with the clamping groove in a sliding connection manner; the cross section of the clamping groove is L-shaped.
Further, damping retaining member 23 constitute by pivot, axle sleeve and spring shim, the spring shim is packaged between the annular space that pivot and axle sleeve are connected.
Furthermore, the lower frame body is provided with a locking hole, and the locking hole and the locking mechanism of the upper frame body are correspondingly arranged.
A use method of a safety warning device for road and bridge construction comprises the following steps:
firstly, transporting the safety warning device to a specified road maintenance place through a transport vehicle, and lifting the safety warning device off the transport vehicle by a worker through a carrying handle, and lifting the safety warning device to the end of the road maintenance place for installation and placement;
step two, firstly, the locking state between a lock ring of the upper frame body and a lock catch of the lower frame body is released, the upper frame body is turned around the hinged position with the lower frame body, a locking rod is driven to extrude a spring in the lock groove through a guide handle of a locking mechanism, the locking rod slides, one end of the locking rod enters a locking hole of the lower frame body, after the locking rod enters, the guide handle is transversely rotated, the guide handle is clamped in the lock groove, and therefore locking of the locking rod is achieved, and locking of the upper frame body and the lower frame body is achieved through matching of the locking rod and the locking hole;
step three, vertically placing the safety warning device, pulling the supporting legs on the lower frame body to enable the supporting legs to rotate outwards around the lower frame body, enabling the supporting legs and the lower frame body to form a right-angle state, straightening the folding support rods in a folding state at the moment, and forming a supporting state between the supporting legs and the lower frame body, so that the whole safety warning device can keep a vertical standing state through the matching of the supporting legs and the folding support rods, pulling the storage battery to rotate outwards around the lower frame body, and improving the gravity center stability of the whole safety warning device through the self weight of the storage battery;
and step four, the solar cell panel on the upper frame body of the safety warning device is unfolded outwards around the upper frame body, the solar cell panel and the upper frame body form a right-angle state, the solar cell panel can supplement electric energy for the storage battery, a power switch is turned on, the content on the display screen is adjusted to the warning slogan content corresponding to the road construction site condition through an adjusting button, and the purpose of warning that the passing vehicle drives carefully is achieved.
Compared with the prior art, the invention has the advantages and positive effects that,
1. in the invention, the locking mechanism is arranged on the safety warning device, so that the locking state between the upper frame body and the lower frame body of the safety warning device is conveniently kept;
2. meanwhile, after the locking mechanism is unlocked, the folding and the storage between the upper frame body and the lower frame body are facilitated;
3. the whole safety warning device can keep a vertical standing state through the matching of the supporting legs and the folding support rods, and meanwhile, the supporting legs and the folding support rods are easy to fold and store, so that the safety warning device is convenient to transport;
4. the solar panel can supplement electric energy for the storage battery of the safety warning device;
5. the display screen and the controller of the safety warning device are powered by the storage battery, the safety warning words can be replaced at will through the display screen, the problem that the safety board is limited due to use is solved because the existing safety warning board prints the warning slogan on the surface of the safety board, the safety slogan is difficult to change after the safety warning board is printed, and meanwhile, the safety warning words displayed by the display screen are convenient for a driver to observe when being used at night and are prepared in advance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the structure of FIG. 1;
FIG. 3 is a schematic view of the expanded structure of FIG. 2 in the operating state of the present invention;
FIG. 4 is a schematic perspective view of the locking mechanism of the present invention;
fig. 5 is a schematic structural view after the foldable container is folded and stored.
Illustration of the drawings: 1-an upper frame body; 2-a lower frame body; 3-a display screen; 4-a controller; 5-warning light; 6-mounting a frame; 7-a storage battery; 8-supporting feet; 9-folding the brace rod; 10-carrying handle; 11-a locking ring; 12-locking and buckling; 13-solar panel; 14-a power switch; 15-adjusting the button; 16-a limiting block; 17-a card slot; 18-a locking lever; 19-a spring; 20-a lead-out hole; 21-a guiding handle; 22-locking hole; 23-damping locking.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. 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 application.
As shown in fig. 1-5, the safety warning device for road and bridge construction comprises an upper frame body 1 and a lower frame body 2, wherein the upper frame body 1 is hinged to the lower frame body 2 through a hinge, a carrying handle 10 is arranged on the upper frame body 1, and is convenient for workers to carry the safety warning device, locking rings 11 are symmetrically arranged on two sides of the upper frame body 1, locking buckles 12 are symmetrically arranged on two sides of the lower frame body 2, the locking rings 11 of the upper frame body 1 are matched and locked with the locking buckles 12 of the lower frame body 2, and the purpose of the arrangement is that when the workers carry the safety warning device, the upper frame body 1 and the lower frame body 2 temporarily form a whole.
The display screen 3 is movably mounted in the upper frame body 1 through symmetrically arranged damping locking parts 23, the damping locking parts 23 are conventional parts purchased in the market, the damping locking parts 23 are composed of rotating shafts, shaft sleeves and spring gaskets, the spring gaskets are sleeved between annular gaps where the rotating shafts are connected with the shaft sleeves, and the spring gaskets can generate counter-force for attenuating external force and delay mutual movement between the rotating shafts and the shaft sleeves; the pivot of damping retaining member 23 is adorned admittedly on last framework 1, and the axle sleeve and the 3 fixed connection of display screen of damping retaining member 23, display screen 3 rotate on last framework 1 through the cooperation of pivot and axle sleeve, and the purpose that sets up like this is adjusted the angle of display screen 3, makes things convenient for the driver to observe the warning poster on the display screen 3.
The front end and the rear end of the display screen 3 are respectively provided with a solar cell panel 13, the solar cell panel 13 is movably connected with the upper frame body 1 through a damping locking piece 23, a rotating shaft of the damping locking piece 23 is fixedly arranged on the upper frame body 1, a shaft sleeve of the damping locking piece 23 is fixedly connected with the solar cell panel 13, and the solar cell panel 13 is overturned around the upper frame body 1 through the damping locking piece 23.
Be provided with controller 4 on the last framework 1 of display screen 3 below, controller 4 includes the controller body, processor module, display module, adjusting module, storage module, switch 14 and adjusting button 15, be provided with switch 14 on the controller body, be provided with adjusting button 15 on the controller body of switch 14 one side, this internal processor module that is provided with of controller, display module, adjusting module, storage module, processor module respectively with display module, adjusting module, storage module, switch 14 and adjusting button 15 electricity are connected, various warning slogans have been typeeed in advance in the storage module.
During the use, drive the check lock lever 18 through the direction and take place to slide in draw-in groove 17 and form the extrusion to spring 19, make check lock lever 18 stretch out through the escape aperture 20 and enter into the locking hole 22 of frame 2 down in, rotate the direction and handle 21, make the direction handle 21 card in draw-in groove 17, form spacingly to the direction handle 21 through draw-in groove 17 to realize the locking of check lock lever 18.
The lower frame body 2 is provided with an installation frame 6 through a damping locking piece 23, a rotating shaft of the damping locking piece 23 is fixedly installed on the lower frame body 2, a shaft sleeve of the damping locking piece 23 is fixedly connected with the installation frame 6, a storage battery 7 is fixedly installed on the installation frame 6 through bolts, and the controller 4 is electrically connected with the storage battery 7, the warning lamp 5 and the display screen 3; the battery 7 provides the electric energy for controller 4, warning light 5 and display screen 3, and solar cell panel 13 is connected with battery 7 electricity, and solar cell panel 13 supplements the electric energy for battery 7.
The symmetry is provided with the recess on the lower framework 2 in the battery 7 outside, is equipped with supporting legs 8 through damping retaining member 23 in the recess, is connected through folding vaulting pole 9 between supporting legs 8 and the lower framework 2, and supporting legs 8 and folding vaulting pole 9 homoenergetic are accomodate in the recess.
Be provided with stopper 16 on the lower framework 2 of mounting bracket 6 both sides, stopper 16 is contradicted with mounting bracket 6 and is connected, and stopper 16 forms spacingly to mounting bracket 6, prevents that mounting bracket 6 from taking place the arbitrary upset in both sides, makes mounting bracket 6 can only overturn towards the front end of lower framework 2 through stopper 16.
When the safety warning device for road and bridge construction is used, the locking state between the locking ring 11 of the upper frame body 1 and the lock catch 12 of the lower frame body 2 is firstly released, the upper frame body 1 is enabled to overturn around the hinged position with the lower frame body 2, the locking rod 18 is driven by the guide handle 21 of the locking mechanism to extrude the spring 19 in the clamping groove 17, the locking rod 18 slides, one end of the locking rod 18 enters the locking hole 22 of the lower frame body 2, after the locking rod 18 enters, the guide handle 21 is transversely rotated, the guide handle 21 is enabled to be clamped in the clamping groove 17, and therefore locking of the locking rod 18 is achieved, and locking of the upper frame body 1 and the lower frame body 2 is achieved through matching of the locking rod 18 and the locking hole 22.
Go up framework 1 and the completion of lower framework 2 locking back, with the vertical placement of this safety warning device, supporting legs 8 on the framework 2 under the pulling, make supporting legs 8 take place outside rotation around framework 2 down, supporting legs 8 and framework 2 form the right angle state down, folding vaulting pole 9 is straightened by the rugosity this moment, form the supported state between supporting legs 8 and lower framework 2, thereby make whole this safety warning device can keep vertical state of standing through the cooperation of supporting legs 8 and folding vaulting pole 9, pulling battery 7 takes place outside rotation around framework 2 down, the weight through battery 7 self improves whole safety warning device's focus stability.
The solar cell panel 13 on the upper frame body 1 of the safety warning device is unfolded outwards around the upper frame body 1, the solar cell panel 13 and the upper frame body 1 form a right-angle state, the solar cell panel 13 can supplement electric energy for the storage battery 7, the power switch 14 is turned on, the content on the display screen 3 is adjusted to the warning slogan content corresponding to the road construction site situation through the adjusting button 15, and the purpose of warning passing vehicles is achieved.
The locking mechanism is arranged in the safety warning device, so that the upper frame body 1 and the lower frame body 2 of the safety warning device can be conveniently kept in a locking state, and meanwhile, the locking mechanism is unlocked to facilitate the folding and the storage between the upper frame body 1 and the lower frame body 2; the whole safety warning device can keep a vertical standing state through the matching of the supporting legs 8 and the folding support rods 9, meanwhile, the supporting legs 8 and the folding support rods 9 are easy to fold and store, so that the safety warning device is convenient to transport, and the storage battery 7 of the safety warning device can be supplemented with electric energy through the solar cell panel 13; display screen 3 and controller 4 for this safety warning device provide the electric energy through battery 7, can change safety warning words at will through display screen 3, it is the surface of printing the safety tablet with warning poster to have solved current safety warning tablet, the safety poster just is difficult to change after printing, lead to the problem that the safety tablet used the limitation, the safety warning words that 3 demonstration of display screen simultaneously are when using night, make things convenient for the driver to observe, and prepare in advance.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (10)
1. The utility model provides a safety warning device for road and bridge construction, includes framework (1) and lower framework (2), its characterized in that: the upper frame body (1) is hinged with the lower frame body (2), the upper frame body (1) is provided with a display screen (3) through symmetrically arranged damping locking pieces (23), the upper frame body (1) below the display screen (3) is provided with a controller (4), the upper frame body (1) at two sides of the controller (4) is provided with an alarm lamp (5), and the upper frame body (1) at the outer side of the alarm lamp (5) is internally provided with a locking mechanism; the lower frame body (2) is provided with an installation frame (6) through a damping locking piece (23), the installation frame (6) is fixedly provided with a storage battery (7), and the controller (4) is electrically connected with the storage battery (7), the alarm lamp (5) and the display screen (3); the lower frame body (2) on the outer side of the storage battery (7) is symmetrically provided with grooves, supporting legs (8) are arranged in the grooves through damping locking pieces (23), and the supporting legs (8) are connected with the lower frame body (2) through folding support rods (9).
2. The safety warning device for road and bridge construction according to claim 1, wherein: the upper frame body (1) is provided with a handle (10).
3. The safety warning device for road and bridge construction according to claim 1, wherein: the lock ring (11) is symmetrically arranged on two sides of the upper frame body (1), the lock catches (12) are symmetrically arranged on two sides of the lower frame body (2), and the lock rings (11) of the upper frame body (1) are matched and locked with the lock catches (12) of the lower frame body (2).
4. The safety warning device for road and bridge construction according to claim 1, wherein: the front end and the rear end of the display screen (3) are respectively provided with a solar cell panel (13), the solar cell panel (13) is movably connected with the upper frame body (1) through a damping locking piece (23), and the solar cell panel (13) is electrically connected with the storage battery (7).
5. The safety warning device for road and bridge construction according to claim 1, wherein: the controller (4) comprises a controller body, a processor module, a display module, an adjusting module, a storage module, a power switch (14) and an adjusting button (15), wherein the power switch (14) is arranged on the controller body, the adjusting button (15) is arranged on the controller body on one side of the power switch (14), the processor module, the display module, the adjusting module and the storage module are arranged in the controller body, and the processor module is respectively electrically connected with the display module, the adjusting module, the storage module and the adjusting button (15).
6. The safety warning device for road and bridge construction according to claim 1, wherein: the lower frame bodies (2) on the two sides of the mounting frame (6) are provided with limiting blocks (16), and the limiting blocks (16) are connected with the mounting frame (6) in an abutting mode.
7. The safety warning device for road and bridge construction according to claim 1, wherein: the locking mechanism comprises a locking rod (18), a clamping groove (17) used for installing the locking rod (18) and a spring (19), the clamping groove (17) is arranged on the upper frame body (1), the locking rod (18) is installed in the clamping groove (17) through the spring (19), a guide hole (20) is formed in the lower frame body (2) corresponding to one end of the locking rod (18), one end of the locking rod (18) penetrates through the guide hole (20) and extends to the outer side, a guide handle (21) is installed on the locking rod (18), one end of the guide handle (21) extends out of the clamping groove (17), and the guide handle (21) is in sliding connection with the clamping groove (17) in a matched mode; the cross section of the clamping groove (17) is L-shaped.
8. The safety warning device for road and bridge construction according to claim 1, wherein: damping retaining member (23) comprise pivot, axle sleeve and spring shim, and the spring shim is installed to the cover between the annular space that pivot and axle sleeve are connected.
9. The safety warning device for road and bridge construction according to claim 1, wherein: the lower frame body (2) is provided with a locking hole (22), and the locking hole (22) corresponds to the locking mechanism of the upper frame body (1).
10. A method for using a safety warning device for road and bridge construction, which comprises the steps of claim 1 to 9, wherein: the method comprises the following steps:
firstly, transporting the safety warning device to a specified road maintenance place through a transport vehicle, and lifting the safety warning device off the transport vehicle through a carrying handle (10) by a worker, and lifting the safety warning device to the end of the road maintenance place for installation and placement;
step two, firstly, the locking state between a lock ring (11) of an upper frame body (1) and a lock catch (12) of a lower frame body (2) is released, the upper frame body (1) is turned around the hinged part with the lower frame body (2), a locking rod (18) is driven by a guide handle (21) of a locking mechanism to extrude a spring (19) in a clamping groove (17), the locking rod (18) slides, one end of the locking rod (18) enters a locking hole (22) of the lower frame body (2), after the locking rod (18) enters, the guide handle (21) is transversely rotated, the guide handle (21) is clamped in the clamping groove (17), so that the locking of the locking rod (18) is realized, and the upper frame body (1) and the lower frame body (2) are kept in a spreading state after being turned and spread through the matching of the locking rod (18) and the locking hole (22);
step three, vertically placing the safety warning device, pulling a supporting leg (8) on the lower frame body (2) to enable the supporting leg (8) to rotate outwards around the lower frame body (2), wherein the supporting leg (8) and the lower frame body (2) form a right-angle state, at the moment, a folding support rod (9) is straightened in a folding shape, and a supporting state is formed between the supporting leg (8) and the lower frame body (2), so that the whole safety warning device can keep a vertical standing state through the matching of the supporting leg (8) and the folding support rod (9), and pulling a storage battery (7) to rotate outwards around the lower frame body (2);
and step four, the solar cell panel (13) on the upper frame body (1) of the safety warning device is unfolded outwards around the upper frame body (1), the solar cell panel (13) and the upper frame body (1) form a right-angle state, the solar cell panel (13) can supplement electric energy for the storage battery (7), a power switch (14) is turned on, the content on the display screen (3) is adjusted to the warning slogan content corresponding to the road construction site condition through an adjusting button (15), and a warning effect is achieved on passing vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011130527.8A CN112227243A (en) | 2020-10-21 | 2020-10-21 | Safety warning device for road and bridge construction and use method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011130527.8A CN112227243A (en) | 2020-10-21 | 2020-10-21 | Safety warning device for road and bridge construction and use method |
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| CN112227243A true CN112227243A (en) | 2021-01-15 |
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| CN202011130527.8A Pending CN112227243A (en) | 2020-10-21 | 2020-10-21 | Safety warning device for road and bridge construction and use method |
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Application publication date: 20210115 |