Safety warning device for engineering supervision

By designing an adjustable and storage safety warning device for engineering supervision, the existing devices occupy a large space and cannot be stored, and convenient storage and handling are achieved.

CN119479471APending Publication Date: 2025-02-18JIANGXI CHENGKE CONSTR CONSULTING SUPERVISION
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Patent Information

Application Number
CN202411767352.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

The existing safety warning device for engineering supervision occupies a large space and cannot be folded and stored, which makes it inconvenient to transport and store.

Method used

A device including a safety warning sign and a storage bracket is designed, and the bracket includes a scissor telescopic mechanism, an adjustable support mechanism and an adjustable fixing mechanism, allowing the angle, height of the warning sign and the size of the bracket to be adjusted and stored.

Benefits of technology

It realizes convenient storage and handling of safety warning devices, reduces storage space requirements and improves usage flexibility.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a safety warning device for engineering supervision, and relates to the technical field of engineering supervision, the safety warning device comprises a safety warning board and a storable support, the safety warning board is fixed on the storable support, and the storable support comprises a connecting vertical block, a connecting rod and a connecting rod; the device comprises a scissor telescopic mechanism, a fixed vertical block, an adjustable supporting mechanism and an adjustable fixing mechanism. When the safety warning board is stored, the safety warning board is separated from the storable bracket, and the rotating plate is rotated, so that the rotating plate coincides with the fixed plate, and the overall size of the storable bracket is reduced; a supporting sleeve plate is rotated, so that the supporting sleeve plate is close to a fixed vertical block, and the overall size of the storable bracket is further reduced; the fixed vertical blocks are pressed, so that the two groups of fixed vertical blocks are close to each other, and the overall size of the storable bracket is reduced for the third time, so that the storable bracket is convenient to store.
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Description

Technical Field

[0001] The invention relates to the technical field of engineering supervision, in particular to a safety warning device for engineering supervision. Background Art

[0002] Project supervision refers to the service activities that control the quality, cost, and progress of construction projects, manage contracts and information, coordinate the relationships between parties involved in the construction project, and perform the statutory duties for construction project safety management during the construction phase in accordance with laws and regulations, engineering construction standards, survey and design documents, and contracts.

[0003] In the prior art, when engineering supervision is performed at a construction site, a safety warning device needs to be used. The existing safety warning device usually includes a bracket and a warning sign. The warning sign is fixedly connected to the bracket, and the overall space occupied is large. It cannot be folded and stored, which makes it inconvenient to carry and move. Therefore, there is an urgent need for a safety warning device for engineering supervision to solve the above problems. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a safety warning device for engineering supervision to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A safety warning device for engineering supervision, comprising a safety warning sign and a retractable bracket, wherein the safety warning sign is fixed on the retractable bracket, and the retractable bracket comprises:

[0007] Connect the vertical blocks;

[0008] Scissor-type telescopic mechanism, wherein two groups of the scissor-type telescopic mechanism are provided and symmetrically arranged on both sides of the connecting vertical block, and one end of the scissor-type telescopic mechanism is connected to the connecting vertical block;

[0009] The fixed vertical block is connected to the other end of the scissor telescopic mechanism;

[0010] An adjustable support mechanism is connected to the bottom of the fixed vertical block, and the adjustable support mechanism is placed and fixed on the ground;

[0011] The adjustable fixing mechanism has one end connected to the fixed vertical block and the other end abutting against the safety warning sign, and is used to fix the safety warning sign.

[0012] As a further solution of the present invention: the scissor-type telescopic mechanism comprises:

[0013] Sliding blocks, wherein the sliding blocks are provided in four groups, two groups of the sliding blocks are slidably connected to the connecting vertical blocks and are arranged in parallel one above and one below, and the other two groups of the sliding blocks are slidably connected to the fixed vertical blocks and are arranged in parallel one above and one below;

[0014] Support rods, wherein the support rods are provided in two groups, and both ends are rotatably connected to the two groups of sliding blocks respectively, and the two groups of support rods are cross-arranged;

[0015] A connecting shaft pin passes through the intersection of the two groups of support rods and is rotationally connected thereto;

[0016] A rotating sleeve connected to the connecting shaft pin;

[0017] One end of the position-limiting telescopic rod is connected to the rotating sleeve, and the other end is connected to the connecting vertical block.

[0018] As a further solution of the present invention: the adjustable support mechanism comprises:

[0019] Rotate the folding rod so that the top is connected to the bottom of the fixed vertical block;

[0020] A supporting sleeve plate is rotatably connected to the bottom end of the rotating folding rod;

[0021] An angle limiting component, one end of which is connected to the rotating folding rod and the other end of which is connected to the supporting sleeve plate, is used to adjust and limit the angle of the safety warning sign.

[0022] As a further solution of the present invention: the angle limiting component includes:

[0023] A tooth block ring is connected to the inner wall of the support sleeve, and the tooth block ring is composed of a plurality of groups of tooth blocks arranged circumferentially at equal intervals;

[0024] A fixed telescopic rod, one end of which is connected to the rotating folding rod;

[0025] The clamping block tooth is connected to the other end of the fixed telescopic rod and is clamped with the tooth block ring, and both sides of the clamping block tooth are bevel structures;

[0026] The elastic member is sleeved on the fixed telescopic rod, one end of which is connected to the rotating folding rod, and the other end of which is connected to the clamping block teeth.

[0027] As a further solution of the present invention: the adjustable fixing mechanism comprises:

[0028] A height limiting component, one end of which is connected to the fixed vertical block, and is used to adjust and limit the height of the safety warning sign;

[0029] A fixing plate connected to the other end of the height limiting component;

[0030] A bottom bearing rod connected to the bottom of the fixed plate;

[0031] A rotating plate, one end of which is rotatably connected to the top of the fixed plate;

[0032] A fixed rotating plate is rotatably connected to the other end of the rotating plate;

[0033] The second fixing bolt passes through the top of the fixing plate and is threadedly connected thereto, and the second fixing bolt abuts against the rotating plate.

[0034] As a further solution of the present invention: the height limiting component comprises:

[0035] A sliding card plate is slidably engaged with the fixed vertical block, and the sliding card plate is connected to the fixed plate;

[0036] A fixing bolt 1 penetrates through one side of the sliding card plate and is threadedly connected thereto, and the fixing bolt 1 abuts against the fixed vertical block.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] When the present invention is stored, the safety warning sign is separated from the storage bracket, and the rotating plate is rotated so that the rotating plate overlaps with the fixed plate, thereby reducing the overall size of the storage bracket; the supporting sleeve is rotated so that the supporting sleeve is close to the fixed vertical block, thereby further reducing the overall size of the storage bracket; the fixed vertical block is pressed so that the two groups of fixed vertical blocks are close to each other, thereby reducing the overall size of the storage bracket for the third time, thereby facilitating the storage of the storage bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of a safety warning device for engineering supervision from a certain angle.

[0040] Figure 2 This is a schematic diagram of the structure of a safety warning device for engineering supervision from another angle.

[0041] Figure 3 Schematic diagram of the structure of the stowable bracket in the embodiment of the present invention.

[0042] Figure 4 It is a schematic structural diagram of the scissor-type telescopic mechanism in an embodiment of the present invention.

[0043] Figure 5 Schematic diagram of the structure of the adjustable support mechanism in an embodiment of the present invention.

[0044] Figure 6 Schematic diagram of the structure of the angle limiting component in an embodiment of the present invention.

[0045] Figure 7 Schematic diagram of the structure of the adjustable fixing mechanism in an embodiment of the present invention.

[0046] In the figure: 1. safety warning sign; 2. retractable bracket; 21. connecting vertical block; 22. scissors-type telescopic mechanism; 23. fixed vertical block; 24. adjustable supporting mechanism; 25. adjustable fixing mechanism; 221. sliding block; 222. support rod; 223. connecting shaft pin; 224. rotating sleeve; 225. limiting telescopic rod; 241. rotating folding rod; 242. supporting sleeve plate; 243. angle limiting assembly; 2431. tooth block ring; 2432. fixed telescopic rod; 2433. block teeth; 2434. elastic member; 251. height limiting assembly; 252. fixed plate; 253. bottom bearing rod; 254. rotating plate; 255. fixed rotating plate; 256. fixing bolt 2; 2511. sliding card plate; 2512. fixing bolt 1. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the embodiment of the present invention, please refer to Figures 1 to 7 A safety warning device for engineering supervision includes a safety warning sign 1 and a retractable bracket 2, wherein the safety warning sign 1 is fixed on the retractable bracket 2, and the retractable bracket 2 includes:

[0049] Connecting vertical block 21;

[0050] A scissor-type telescopic mechanism 22, wherein two groups of the scissor-type telescopic mechanism 22 are symmetrically arranged on both sides of the connecting vertical block 21, and one end of the scissor-type telescopic mechanism is connected to the connecting vertical block 21;

[0051] A fixed vertical block 23 is connected to the other end of the scissor-type telescopic mechanism 22;

[0052] An adjustable support mechanism 24 is connected to the bottom of the fixed vertical block 23, and the adjustable support mechanism 24 is placed and fixed on the ground;

[0053] The adjustable fixing mechanism 25 has one end connected to the fixed vertical block 23 and the other end abutting against the safety warning sign 1 , so as to fix the safety warning sign 1 .

[0054] When installing the safety warning sign 1, the scissor-type telescopic mechanism 22 is pulled according to the length of the safety warning sign 1, the gap between the two sets of fixed vertical blocks 23 is adjusted, and the safety warning sign 1 is placed on the adjustable fixing mechanism 25. The adjustable fixing mechanism 25 fixes the safety warning sign 1, and the adjustable supporting mechanism 24 supports the safety warning sign 1, and the display angle of the safety warning sign 1 can be adjusted; the overall size of the retractable bracket 2 is adjustable, and when not in use, its volume can be reduced to facilitate its storage.

[0055] As an embodiment of the present invention, please refer to Figures 2 to 4 , the scissor-type telescopic mechanism 22 comprises:

[0056] Sliding blocks 221, wherein the sliding blocks 221 are provided in four groups, two groups of the sliding blocks 221 are slidably connected to the connecting vertical blocks 21, and are arranged in parallel one above and one below, and the other two groups of the sliding blocks 221 are slidably connected to the fixed vertical blocks 23, and are arranged in parallel one above and one below;

[0057] Support rods 222, wherein two groups of support rods 222 are provided, and both ends are rotatably connected to two groups of sliding blocks 221, respectively, and the two groups of support rods 222 are cross-arranged;

[0058] The connecting shaft pin 223 passes through the intersection of the two sets of support rods 222 and is rotatably connected thereto;

[0059] The rotating sleeve 224 is connected to the connecting shaft pin 223;

[0060] One end of the position-limiting telescopic rod 225 is connected to the rotating sleeve 224 , and the other end is connected to the connecting vertical block 21 .

[0061] When installing the warning sign 1, according to the size of the safety warning sign 1, the fixed vertical block 23 is pulled horizontally, and the fixed vertical block 23 drives the support rod 222 to rotate around the connecting shaft pin 223, and the distance between the two groups of the fixed vertical blocks 23 is adjusted;

[0062] When the retractable bracket 2 is not needed, the fixed vertical blocks 23 can be pressed so that the two groups of fixed vertical blocks 23 are close to each other, thereby reducing the overall volume of the retractable bracket 2.

[0063] As an embodiment of the present invention, please refer to Figures 1 to 3 , Figure 5 and Figure 6 , the adjustable support mechanism 24 comprises:

[0064] The top of the rotating folding rod 241 is connected to the bottom of the fixed vertical block 23;

[0065] The supporting sleeve plate 242 is rotatably connected to the bottom end of the rotating folding rod 241;

[0066] The angle limiting component 243 has one end connected to the rotating folding rod 241 and the other end connected to the supporting sleeve plate 242 , and is used to adjust and limit the angle of the safety warning sign 1 .

[0067] When installing the safety warning sign 1 , the support sleeve 242 is placed and fixed on the ground, and the angle limiting component 243 adjusts and limits the display angle of the safety warning sign 1 .

[0068] As an embodiment of the present invention, please refer to Figure 5 and Figure 6 , the angle limiting component 243 includes:

[0069] The tooth block ring 2431 is connected to the inner wall of the support sleeve 242, and the tooth block ring 2431 is composed of a plurality of groups of tooth blocks arranged in a circle with equal spacing;

[0070] A fixed telescopic rod 2432, one end of which is connected to the rotating folding rod 241;

[0071] The clamping block tooth 2433 is connected to the other end of the fixed telescopic rod 2432 and is clamped with the tooth block ring 2431. Both sides of the clamping block tooth 2433 are bevel structures;

[0072] The elastic member 2434 is sleeved on the fixed telescopic rod 2432 , and one end of the elastic member 2434 is connected to the rotating folding rod 241 , and the other end of the elastic member 2434 is connected to the clamping block tooth 2433 .

[0073] The block teeth 2433 are engaged with the tooth block ring 2431 to fix the rotating folding rod 241, thereby fixing the angle of the safety warning sign 1. When the angle of the safety warning sign 1 needs to be adjusted, the fixed vertical block 23 is pressed, so that the fixed vertical block 23 drives the rotating folding rod 241 to rotate, and the rotating folding rod 241 drives the block teeth 2433 to rotate. During the rotation of the block teeth 2433, the block teeth 2433 move under the pressure of the tooth block ring 2431. At the same time, the elastic member 2434 undergoes elastic deformation. When the block teeth 2433 rotates to engage with other tooth blocks, the elastic member 2434 drives the block teeth 2433 to move to engage with the tooth block ring 2431, fixes the rotating folding rod 241, thereby adjusting the angle of the safety warning sign 1. The elastic member 2434 can be a spring, a spring sheet, etc.

[0074] In this embodiment, when the retractable bracket 2 needs to be retracted, the support sleeve 242 is rotated so that the support sleeve 242 is close to the fixed vertical block 23 to reduce the overall size of the retractable bracket 2.

[0075] As an embodiment of the present invention, please refer to Figures 1 to 3 , Figure 7 , the adjustable fixing mechanism 25 comprises:

[0076] A height limiting component 251, one end of which is connected to the fixed vertical block 23, and is used to adjust and limit the height of the safety warning sign 1;

[0077] A fixing plate 252 connected to the other end of the height limiting component 251;

[0078] The bottom bearing rod 253 is connected to the bottom of the fixing plate 252;

[0079] The rotating plate 254 has one end rotatably connected to the top of the fixed plate 252;

[0080] A fixed rotating plate 255 is rotatably connected to the other end of the rotating plate 254;

[0081] The second fixing bolt 256 passes through the top of the fixing plate 252 and is threadedly connected thereto. The second fixing bolt 256 abuts against the rotating plate 254 .

[0082] Place the safety warning sign 1 on the bottom bearing rod 253, rotate the rotating plate 254 to drive the fixed rotating plate 255 to move, adjust the height of the fixed rotating plate 255 according to the height of the safety warning sign 1, so that the fixed rotating plate 255 abuts against the top of the safety warning sign 1, rotate the fixing bolt 256 so that the fixing bolt 256 abuts against the rotating plate 254, fix the rotating plate 254, and then fix the safety warning sign 1, and the height limiting component 251 adjusts and limits the installation height of the safety warning sign 1.

[0083] In this embodiment, the fixed rotating plate 255 is rotatably connected to the rotating plate 254, which can ensure that after the rotating plate 254 is rotated to any angle, the fixed rotating plate 255 can be horizontally abutted against the top of the safety warning sign 1 to ensure the fixing effect; in this embodiment, the rotating rod 254 and the fixed rotating plate 255 are used to fix the safety warning sign 1, and safety warning signs 1 of different sizes can be fixed. If the height of the safety warning sign 1 is less than the height of the fixed plate 252, it can also be fixed.

[0084] As an embodiment of the present invention, please refer to Figures 1 to 3 , Figure 7 , the height limiting component 251 includes:

[0085] The sliding card plate 2511 is slidably engaged with the fixed vertical block 23, and the sliding card plate 2511 is connected to the fixed plate 252;

[0086] The fixing bolt 2512 passes through one side of the sliding card plate 2511 and is threadedly connected thereto. The fixing bolt 2512 abuts against the fixing vertical block 23 .

[0087] The sliding card plate 2511 is slidably engaged with the fixed vertical block 23, which can drive the fixed plate 252 to slide longitudinally along the fixed vertical block 23, thereby adjusting the installation height of the safety warning sign 1. After the adjustment is completed, the fixing bolt 2512 is rotated so that the fixing bolt 2512 abuts against the fixed vertical block 23 to fix the sliding card plate 2511, thereby adjusting the installation height of the safety warning sign 1.

[0088] As an embodiment of the present invention, please refer to Figure 1 The fixed rotating plate 255 is provided with an anti-slip member.

[0089] The anti-slip member is provided to increase the friction between the fixed rotating plate 255 and the safety warning sign 1 , thereby ensuring the fixing effect of the safety warning sign 1 .

[0090] In this embodiment, the anti-slip member may be an anti-slip pad, or anti-slip grooves may be provided on the fixed rotating plate 255 .

[0091] The working principle of the present invention is as follows: when installing the warning sign 1, according to the size of the safety warning sign 1, the fixed vertical block 23 is pulled horizontally, and the fixed vertical block 23 drives the support rod 222 to rotate around the connecting shaft pin 223, and the spacing between the two groups of the fixed vertical blocks 23 is adjusted, and the safety warning sign 1 is placed on the bottom bearing rod 253, and the rotating plate 254 is rotated to drive the fixed rotating plate 255 to move, and the height of the fixed rotating plate 255 is adjusted according to the height of the safety warning sign 1, so that the fixed rotating plate 255 abuts against the top of the safety warning sign 1, and the fixing bolt 256 is rotated so that the fixing bolt 256 abuts against the rotating plate 254, and the rotating plate 254 is fixed, and then the safety warning sign 1 is fixed, and the sliding card plate 2511 is slidably engaged with the fixed vertical block 23, which can drive the fixed plate 252 to slide longitudinally along the fixed vertical block 23, so as to adjust the installation height of the safety warning sign 1, and after the adjustment is completed, the fixing screw 256 is rotated. The bolt 2512 makes the fixing bolt 2512 abut against the fixed vertical block 23 to fix the sliding card plate 2511, thereby adjusting the installation height of the safety warning sign 1, and the card block teeth 2433 are engaged with the tooth block ring 2431 to fix the rotating folding rod 241, thereby fixing the angle of the safety warning sign 1. When the angle of the safety warning sign 1 needs to be adjusted, the fixed vertical block 23 is pressed to make the fixed vertical block 23 drive the rotating folding rod 241 to rotate, and the rotating folding rod 241 drives the card block teeth 2433 to rotate. During the rotation of the card block teeth 2433, the card block teeth 2433 move under the pressure of the tooth block ring 2431. At the same time, the elastic member 2434 undergoes elastic deformation. When the card block teeth 2433 rotates to engage with other tooth blocks, the elastic member 2434 drives the card block teeth 2433 to move to engage with the tooth block ring 2431, fixes the rotating folding rod 241, thereby adjusting the angle of the safety warning sign 1.

[0092] When the device is not needed, the safety warning sign 1 is separated from the retractable bracket 2, and the rotating plate 254 is rotated so that the rotating plate 254 overlaps with the fixed plate 252, thereby reducing the overall size of the retractable bracket 2; the supporting sleeve 242 is rotated so that the supporting sleeve 242 is close to the fixed vertical block 23, thereby further reducing the overall size of the retractable bracket 2; the fixed vertical block 23 is pressed so that the two groups of fixed vertical blocks 23 are close to each other, thereby reducing the overall size of the retractable bracket 2 for the third time, thereby facilitating the storage of the retractable bracket 2.

[0093] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0094] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A safety warning device for engineering supervision, comprising a safety warning sign and a retractable bracket, wherein the safety warning sign is fixed on the retractable bracket, characterized in that: The retractable bracket includes: Connect the vertical blocks; Scissor-type telescopic mechanism, wherein two groups of the scissor-type telescopic mechanism are provided and symmetrically arranged on both sides of the connecting vertical block, and one end of the scissor-type telescopic mechanism is connected to the connecting vertical block; The fixed vertical block is connected to the other end of the scissor telescopic mechanism; An adjustable support mechanism is connected to the bottom of the fixed vertical block, and the adjustable support mechanism is placed and fixed on the ground; The adjustable fixing mechanism has one end connected to the fixed vertical block and the other end abutting against the safety warning sign, and is used to fix the safety warning sign.

2. A safety warning device for engineering supervision according to claim 1, characterized in that: The scissor-type telescopic mechanism comprises: Sliding blocks, wherein the sliding blocks are provided in four groups, two groups of the sliding blocks are slidably connected to the connecting vertical blocks and are arranged in parallel one above and one below, and the other two groups of the sliding blocks are slidably connected to the fixed vertical blocks and are arranged in parallel one above and one below; Support rods, wherein the support rods are provided in two groups, and both ends are rotatably connected to the two groups of sliding blocks respectively, and the two groups of support rods are cross-arranged; A connecting shaft pin passes through the intersection of the two groups of support rods and is rotationally connected thereto; A rotating sleeve connected to the connecting shaft pin; One end of the position-limiting telescopic rod is connected to the rotating sleeve, and the other end is connected to the connecting vertical block.

3. A safety warning device for engineering supervision according to claim 1, characterized in that: The adjustable support mechanism comprises: Rotate the folding rod so that the top is connected to the bottom of the fixed vertical block; A supporting sleeve plate is rotatably connected to the bottom end of the rotating folding rod; An angle limiting component, one end of which is connected to the rotating folding rod and the other end of which is connected to the supporting sleeve plate, is used to adjust and limit the angle of the safety warning sign.

4. A safety warning device for engineering supervision according to claim 3, characterized in that: The angle limiting component comprises: A tooth block ring is connected to the inner wall of the support sleeve, and the tooth block ring is composed of a plurality of groups of tooth blocks arranged circumferentially at equal intervals; A fixed telescopic rod, one end of which is connected to the rotating folding rod; The clamping block tooth is connected to the other end of the fixed telescopic rod and is clamped with the tooth block ring, and both sides of the clamping block tooth are beveled structures; The elastic member is sleeved on the fixed telescopic rod, one end of which is connected to the rotating folding rod, and the other end of which is connected to the clamping block teeth.

5. A safety warning device for engineering supervision according to claim 1, characterized in that: The adjustable fixing mechanism comprises: A height limiting component, one end of which is connected to the fixed vertical block, and is used to adjust and limit the height of the safety warning sign; A fixing plate connected to the other end of the height limiting component; A bottom bearing rod connected to the bottom of the fixed plate; A rotating plate, one end of which is rotatably connected to the top of the fixed plate; A fixed rotating plate is rotatably connected to the other end of the rotating plate; The second fixing bolt passes through the top of the fixing plate and is threadedly connected thereto, and the second fixing bolt abuts against the rotating plate.

6. A safety warning device for engineering supervision according to claim 5, characterized in that: The height limiting component comprises: A sliding card plate is slidably engaged with the fixed vertical block, and the sliding card plate is connected to the fixed plate; A fixing bolt 1 penetrates through one side of the sliding card plate and is threadedly connected thereto, and the fixing bolt 1 abuts against the fixed vertical block.

7. A safety warning device for engineering supervision according to claim 5, characterized in that: The fixed rotating plate is provided with an anti-slip part.