Protective fence for civil engineering site

Abstract

The protective fence for the civil engineering site comprises a protective fence frame body and installation mechanisms arranged on the two sides of the protective fence frame body respectively, each installation mechanism comprises a stand column, a movable inner rod, a rotating frame and a hanging frame structure, the bottom end of the movable inner rod is arranged in the stand column, the top end of the movable inner rod extends out of the stand column, and the movable inner rod can slide up and down along the inner wall of the stand column; the rotating frame is rotationally arranged on the top surface of the movable inner rod; the hanging frame structure comprises a fixed section fixedly connected with the rotating frame and a movable section movably connected to one side of the fixed section, and a hanging area capable of being closed or opened is formed between the movable section and the fixed section. According to the device, additional facilities can be hung and fixed, the hanging angle and height are adjustable, working requirements of different heights and angles can be met, other supporting objects do not need to be erected in the working process, the mounting time is saved, meanwhile, the space of the protective guard is fully utilized, tools and equipment are prevented from occupying the ground space, and the working area is cleaner and more orderly.

Description

Technical Field

[0001] The utility model relates to the technical field of civil construction, in particular to a protective fence used on civil construction sites. Background Art

[0002] As the name suggests, guardrails for civil construction sites refer to a temporary protective facility set up at construction sites to ensure the safety of workers. It is mainly composed of columns, cross bars, meshes and other components. It has the characteristics of high strength, corrosion resistance, and easy disassembly and assembly. The main function of the guardrail is to isolate the construction site to prevent unrelated personnel outside the construction site from accidentally entering, while ensuring the safety of workers on the construction site and reducing the occurrence of safety accidents such as falls from heights and being hit by objects. At civil construction sites, guardrails play a vital role. With the continuous development of the construction industry, the application of guardrails for civil construction sites will become more and more extensive, providing strong guarantees for creating a safe construction environment and ensuring the smooth progress of the project.

[0003] The Chinese utility model publication number CN214943089U discloses a guardrail for civil engineering sites. Compared with traditional guardrails for civil engineering sites, the guardrail for civil engineering sites has a faster assembly process and simpler assembly steps. It only needs to pull the pull ring to drive the connecting rod and the plug rod fixed to the connecting rod to move upward, and then the rod can be plugged into the slot provided in the fixed block on another guardrail for connection. After plugging, the pull ring is released, and the connecting rod and the plug rod can be driven downward by the rebound force of the tension spring to engage with the fixed block to complete the splicing. This eliminates the trouble of bolting guardrails for civil engineering sites. The disassembly work after connection is also faster, which saves people a lot of preliminary preparation and post-processing work when carrying out civil engineering work. At the same time, the triangular stable structure formed by the first support leg and the second support leg at the bottom of the frame can be applied to complex ground. Even if the ground is uneven, it can achieve a good stability effect after installation and will not easily shake. It increases the stability of the connection between the frames and has a better use effect.

[0004] However, there are some problems in implementing the above technical solutions. For example, temporary lighting and dust suppression facilities need to be provided at the site of use, and the guardrail cannot provide support for these facilities. Support objects need to be set up again, which is cumbersome and time-consuming. Utility Model Content

[0005] The purpose of the present invention is to overcome the above technical deficiencies and to propose a guardrail for civil construction sites, so as to solve the technical problems in the prior art that guardrails cannot provide support for temporary lighting and dust suppression facilities, and that supports need to be erected, which is cumbersome and time-consuming to operate.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a guardrail for civil engineering sites, comprising a guardrail frame body and mounting mechanisms respectively arranged on both sides of the guardrail frame body, wherein the two mounting mechanisms each comprise: a column, a movable inner rod, a rotating frame and a hanging frame structure, wherein the column is connected to the side of the guardrail frame body; the bottom end of the movable inner rod is arranged inside the column, and the top end extends out of the column and can slide up and down along the inner wall of the column; the rotating frame is rotatably arranged on the top surface of the movable inner rod; the hanging frame structure comprises a fixed section fixedly connected to the rotating frame, and a movable section movably connected to one side of the fixed section, and a hanging area that can be closed or opened is formed between the movable section and the fixed section.

[0008] In some embodiments, the guardrail frame includes a frame and several reflective guardrails, the two sides of the frame are respectively connected to the two columns of the mounting mechanism, and the several reflective guardrails are arranged on the inner side of the frame and arranged in parallel along the length direction of the frame, and the top and bottom ends of each reflective guardrail are connected to the frame.

[0009] In some embodiments, a first fixing bolt is threadedly connected to one side of the top end of the column, and one end of the first fixing bolt is tightly connected to the side surface of the movable inner rod to fix the movable inner rod.

[0010] In some embodiments, one end of the rotating frame is rotatably connected to a second fixing bolt and is rotatably connected to the top end of the movable inner rod through the second fixing bolt, and the second fixing bolt is threadedly connected to the top end of the movable inner rod.

[0011] In some embodiments, the fixed section of the bracket structure includes an inner bracket, and the movable section includes an outer bracket. The middle part of one side of the inner bracket is fixedly connected to one side of the rotating frame, one end of the inner bracket is rotatably connected to one end of the outer bracket, and the other end of the inner bracket is bolted to the other end of the outer bracket.

[0012] In some embodiments, the middle portions of the inner and outer pylons are bent outwards to form a space between the middle portions of the inner and outer pylons for accommodating the hanging parts.

[0013] In some embodiments, the guardrail for civil construction sites also includes a support structure arranged at the bottom of the mounting mechanism, and the support structure includes a plurality of support members arranged on the outside of the column, one end of the support member is rotatably connected to the column, and its rotation stroke has a folded state close to the side of the column, and a support state that rotates downward from the folded state to support on the ground.

[0014] In some embodiments, each of the support members includes a rotating seat, a base and a reinforcing pin. One end of the base is rotatably connected to the column through the rotating seat, and the other end of the base is movably connected to the reinforcing pin to fix the base by drilling the reinforcing pin into the ground.

[0015] In some embodiments, each of the support members further includes an outer support rod, an inner support rod and a fixing sleeve, one end of the outer support rod is rotatably connected to the base, and the other end thereof is internally connected to the inner support rod, one end of the inner support rod protrudes from the outer support rod and is threadedly connected to the column, and the fixing sleeve is arranged between the outer support rod and the inner support rod to fix the inner support rod and the outer support rod.

[0016] In some embodiments, the upright post is connected to the guardrail frame through a connecting piece, and the connecting piece includes a connecting post and a connecting sleeve. The connecting post is arranged on the side of the guardrail frame, and a connecting groove is opened on the upright post at a position corresponding to the connecting post. The connecting sleeves are provided on both sides of the upright post at positions corresponding to the connecting grooves. The connecting post passes through the connecting sleeve and the connecting groove and is fixedly connected to the connecting sleeve.

[0017] Compared with the prior art, the guardrail for civil engineering sites provided by the present invention has a guardrail frame and an installation mechanism, and a hanging area that can be closed or opened is provided between the movable section and the fixed section of the hanging frame structure, so that additional facilities can be hung and fixed, so that the additional facilities can be hung and fixed on the guardrail, and there is no need to set up other supports during work, which saves installation time. At the same time, it also makes full use of the space of the guardrail, avoids tools and equipment from occupying ground space, and makes the work area more tidy and orderly; by providing a rotating frame and a movable inner rod, the hanging angle of the additional facilities can be adjusted by rotating the rotating frame to meet the use requirements of various additional facilities, and the movable inner rod can slide up and down on the inner wall of the column, and can drive the rotating frame and the hanging frame structure to move up and down, so that the height of the hanging frame structure and the additional facilities hung on the hanging structure can be adjusted; the angle and height adjustable design of the hanging structure can significantly improve its functionality and flexibility, adapt to work requirements at different heights and angles, and can be suitable for a variety of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a guardrail for a civil construction site provided by an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a guardrail frame for a civil engineering site provided by an embodiment of the present utility model;

[0020] Figure 3This is a schematic diagram of the three-dimensional structure of the installation mechanism and the supporting structure of the guardrail for civil construction sites provided by an embodiment of the utility model when they are in a folded state;

[0021] Figure 4 This is a structural diagram of a hanging frame structure for a guardrail used at a civil engineering site provided by an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the support structure of the guardrail for civil construction sites provided by an embodiment of the present utility model when it is in a supporting state.

[0023] Description of reference numerals:

[0024] 1. Guardrail frame; 11. Frame; 12. Reflective guardrail;

[0025] 2. Mounting mechanism; 21. Vertical column; 22. Movable inner rod; 221. First fixing bolt; 23. Rotating frame; 231. Second fixing bolt; 24. Hanging frame structure; 241. Inner hanging frame; 242. Outer hanging frame; 25. Connecting column; 26. Connecting sleeve; 27. Support structure; 271. Rotating seat; 272. Base; 273. Reinforcement pin; 274. Outer support rod; 275. Inner support rod; 276. Fixing sleeve. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In order to solve the technical problem that the guardrail cannot provide support for temporary lighting and dust suppression facilities, and supports need to be erected, which is cumbersome and time-consuming, the utility model provides a guardrail for civil construction sites, which can hang and fix external facilities, and the hanging angle and height are adjustable, which can adapt to work requirements at different heights and angles. During work, there is no need to erect other supports, which saves installation time. At the same time, it also makes full use of the space of the guardrail, avoids tools and equipment occupying ground space, and makes the work area more tidy and orderly.

[0028] See also Figures 1 to 4The guardrail used in the civil engineering site includes a guardrail frame 1 and mounting mechanisms 2 respectively arranged on both sides of the guardrail frame 1, and the two mounting mechanisms 2 include: a column 21, a movable inner rod 22, a rotating frame 23 and a hanging bracket structure 24, the column 21 is connected to the side of the guardrail frame 1; the bottom end of the movable inner rod 22 is arranged inside the column 21, and the top end extends out of the column 21, and can slide up and down along the inner wall of the column 21; the rotating frame 23 is rotatably arranged on the top surface of the movable inner rod 22; the hanging bracket structure 24 includes a fixed section fixedly connected to the rotating frame 23, and a movable section movably connected to one side of the fixed section, and a hanging area that can be closed or opened is formed between the movable section and the fixed section.

[0029] In this solution, a hanging bracket structure 24 is provided, and a hanging area that can be closed or opened is provided between the movable section and the fixed section of the hanging bracket structure 24. The hanging area can be used to hang and fix additional facilities, so that the additional facilities can be hung and fixed on the guardrail, and there is no need to set up other supports during work, saving installation time; by providing a rotating bracket 23, the rotating bracket 23 is rotatably connected to the top surface of the movable inner rod 22, and the hanging angle of the additional facilities can be adjusted by rotating the rotating bracket 23 to adapt to the use requirements of various additional facilities; by providing a movable inner rod 22, the movable inner rod 22 can slide up and down on the inner wall of the column 21, and can drive the rotating bracket 23 and the hanging bracket structure 24 to move up and down, so that the height of the hanging bracket structure 24 and the additional facilities hung on the hanging bracket structure 24 can be adjusted for easy use.

[0030] Specifically, the column 21 has a hollow square structure with a hollow interior to reduce weight. The size of the movable inner rod 22 is slightly smaller than the size of the interior of the column 21 so that it can slide freely inside the column 21.

[0031] See also Figure 1 and Figure 2 In this embodiment, the guardrail frame 1 includes a frame 11 and a plurality of reflective guardrails 12. The two sides of the frame 11 are respectively connected to the two columns 21 of the mounting mechanism 2. The plurality of reflective guardrails 12 are arranged vertically and are located on the inner side of the frame 11. The plurality of reflective guardrails 12 are arranged in parallel in sequence along the length direction of the frame 11, and the top and bottom ends of each of the reflective guardrails 12 are fixedly connected to the frame 11.

[0032] The frame 11 is rectangular and made of high-strength metal materials such as steel, aluminum alloy, etc. to ensure its durability. The height and width of the frame 11 can be customized according to actual needs. The reflective guardrail 12 is cylindrical and made of plastic or metal, and the surface is coated with a high-reflectivity reflective material.

[0033] The movable inner rod 22 can slide up and down along the inner wall of the column 21. After the movable inner rod 22 slides to a suitable position, in order to fix the movable inner rod 22, please refer to Figures 1 to 3 In some embodiments, a first fixing bolt 221 is threadedly connected to one side of the top of the column 21. One end of the first fixing bolt 221 corresponds to the side surface of the movable inner rod 22. By screwing the first fixing bolt 221 inward, one end of the first fixing bolt 221 is tightly connected to the side surface of the movable inner rod 22, thereby securing the movable inner rod 22. When adjusting the height of the hanger structure 24, the movable inner rod 22 is pulled out of the column 21, and then the first fixing bolt 221 is rotated so that one end of the first fixing bolt 221 is tightly connected to the side surface of the movable inner rod 22. This allows the height of the hanger structure 24 to be adjusted and fixed, allowing the height of external facilities such as temporary lighting and dust suppression to be raised for easier use.

[0034] In order to support the rotating frame 23 to rotate on the top surface of the movable inner rod 22, please refer to Figure 1 and Figure 4 In some embodiments, a second fixing bolt 231 is disposed at the top of the movable inner rod 22. The second fixing bolt 231 passes through one end of the rotating frame 23 and is rotatably connected to the other end of the rotating frame 23. The rotating frame 23 is rotatably connected to the top of the movable inner rod 22 via the second fixing bolt 231. The second fixing bolt 231 is threadedly connected to the top of the movable inner rod 22. During use, the rotating frame 23 is rotated to adjust the direction of the hanging bracket structure 24. The second fixing bolt 231 is then rotated so that the nut of the second fixing bolt 231 presses the rotating frame 23 against the top of the movable inner rod 22 to secure it, thereby accommodating the use of various external devices.

[0035] See also Figure 1 and Figure 4 In this embodiment, the fixed section of the hanger structure 24 includes an inner hanger 241, and the movable section includes an outer hanger 242. The inner hanger 241 is welded to the rotating frame 23. The bottom end of the inner hanger 241 is rotatably connected to one end of the outer hanger 242 via a connecting shaft. The top end of the outer hanger 242 can rotate about its bottom end. When rotating toward the inner hanger 241, the top end of the inner hanger 241 and the top end of the outer hanger 242 can be connected by bolts to securely connect the additional equipment. When the outer hanger 242 rotates away from the inner hanger 241, the distance between the outer hanger 242 and the inner hanger 241 increases, facilitating the removal of the additional equipment. The cooperation between the inner hanger 241 and the outer hanger 242 allows the additional equipment to be fixed to the guardrail, eliminating the need for additional supports, saving installation time and improving construction efficiency.

[0036] Furthermore, in some embodiments, the inner rack 241 and the outer rack 242 are both semi-circular in design, and the middle parts of the inner rack 241 and the outer rack 242 are bent outward so that a space for accommodating a hanging part can be formed between the middle parts of the inner rack 241 and the outer rack 242, and the hanging part is an additional facility, such as a lighting device or a dust reduction device.

[0037] In order to achieve stable support for column 21, please refer to Figure 1 、 Figure 3 and Figure 5 In this embodiment, the construction site guardrail further includes a support structure 27 disposed at the bottom of the column 21 of the mounting mechanism 2. The support structure 27 includes a plurality of support members arranged outside the column 21. One end of the support member is rotatably connected to the column 21, and the rotation range includes a folded state in which the support member is closely attached to the side of the column 21, and a supporting state in which the support member rotates downward from the folded state to support the ground. When the support structure 27 is in the folded state, it is closely attached to the side of the column 21, which can reduce the overall volume and facilitate transportation and storage. When the support structure 27 is in the supporting state, the support member rotates downward and, after unfolding, supports the ground, providing stable support.

[0038] In one embodiment, each of the support members includes a rotating seat 271, a base 272 and a reinforcing pin 273. One end of the base 272 is rotatably connected to the column 21 through the rotating seat 271. The reinforcing pin 273 matches the size of the opening on the other end of the base 272 and can be plugged into the base 272. The bases 272 can be rotated and unfolded around the rotating seat 271, and the reinforcing pin 273 can be drilled into the ground through the base 272 to fix the base 272, thereby stably supporting the column 21 so that the guardrail can be fixed at the construction site through the reinforcing pin 273.

[0039] Furthermore, in order to improve the stability of the guardrail, in some embodiments, each of the support members further includes an outer support rod 274, an inner support rod 275, and a fixing sleeve 276. One end of the outer support rod 274 is rotatably connected to the base 272, and the inner support rod 275 is slidably connected to the inner end of the outer support rod 274. One end of the inner support rod 275 protrudes from the outer support rod 274 and is threadedly connected to the column 21. The fixing sleeve 276 is sleeved between the outer support rod 274 and the inner support rod 275. The inner support rod 275 forms a fixed structure with the outer support rod 274 through the fixing sleeve 276, and the inner support rod 275 is bolted to the column 21. During implementation, the outer support rod 274 is rotated to pull out the inner support rod 275 and connect it to the column 21. Then, the fixing sleeve 276 is rotated to fix the inner support rod 275, so that the inner support rod 275 and the outer support rod 274 can provide support for the column 21, thereby improving the stability of the guardrail.

[0040] Preferably, the base 272 forms a rotating structure through the rotating base 271 and the column 21 , the rotating base 271 and the column 21 are welded, and the column 21 corresponds to four groups of bases 272 .

[0041] To facilitate assembly and disassembly of the guardrail, in this embodiment, a detachable connection is provided between the frame 11 and the three-dimensional structure. Specifically, the upright posts 21 are detachably connected to the guardrail frame 1 via connectors, wherein the connectors include a connecting post 25 and a connecting collar 26. The connecting post 25 is fixedly mounted on the side of the frame 11 of the guardrail frame 1. A connecting groove is formed on the upright post 21 at a position corresponding to the connecting post 25. Connecting collars 26 are provided on both sides of the upright post 21 at positions corresponding to the connecting groove. The connecting post 25 passes through the connecting collar 26 and the connecting groove and is securely connected to the connecting collar 26. The connecting collar 26 is an annular structure formed by combining two semi-annular portions, one of which is welded to the upright post 21 and the other is movably arranged above. The two annular portions are fixed by bolts. The upper semi-annular portion can be pressed downward by tightening the bolts, thereby pressing the connecting post 25 into place using the connecting collar 26. When in use, the connecting column 25 is placed in the connecting sleeve 26 for fixing, which can fix the frame 11 and the mounting mechanism 2. The connecting sleeve 26 is used to facilitate disassembly and assembly, and can also increase stability.

[0042] Preferably, in this embodiment, connecting columns 25 are fixedly provided on the upper and lower parts of both sides of the frame 11. Correspondingly, four groups of connecting ferrules 26 are provided, each group includes two connecting ferrules 26, and the frame 11 and the column 21 can be fixed by connecting the connecting ferrules 26 with the connecting columns 25.

[0043] Of course, in other possible embodiments, the connecting member may further include a bolt or a clamping structure, etc., to achieve a detachable connection between the frame 11 and the column 21 .

[0044] Working principle: First, open the base 272 and adjust the support structure 27 to the supporting state. Then rotate the outer support rod 274, and then pull out the inner support rod 275 to connect with the column 21. Then rotate the fixing sleeve 276 to fix the inner support rod 275 to provide support for the column 21 and improve the stability of the guardrail. Then, fix the guardrail to the construction site through the reinforcement pin 273. Then, put the connecting column 25 into the connecting hoop 26 to fix the frame 11. The use of the connecting hoop 26 facilitates disassembly and assembly and can also increase stability. When other facilities need to be installed, rotate the rotating frame 23 to adjust the direction of the inner bracket 241 and the outer bracket 242, and then use the second fixing bolt 231 to fix it to adapt to the use of different additional facilities. Then, through the cooperation of the inner bracket 241 and the outer bracket 242, the additional facilities are fixed on the guardrail. There is no need to set up other supports, saving installation time and improving construction efficiency. Finally, pull the sleeve rod out of the column 21, and then rotate the first fixing bolt 221 to fix the height of the additional facilities such as temporary lighting and dust suppression.

[0045] The utility model provides a guardrail frame 1 and a mounting mechanism 2, and a hanging area that can be closed or opened is provided between the movable section and the fixed section of the hanging structure 24, so that additional facilities can be hung and fixed, so that the additional facilities can be hung and fixed on the guardrail, and there is no need to set up other supports during work, which saves installation time. At the same time, it also makes full use of the space of the guardrail, avoids tools and equipment from occupying ground space, and makes the work area more tidy and orderly; by providing a rotating frame 23 and a movable inner rod 22, the hanging angle of the additional facilities can be adjusted by rotating the rotating frame 23 to adapt to the use requirements of various additional facilities, and the movable inner rod 22 can slide up and down on the inner wall of the column 21, and can drive the rotating frame 23 and the hanging structure 24 to move up and down, so that the height of the hanging structure 24 and the additional facilities hung on the hanging structure 24 can be adjusted; the angle and height adjustable design of the hanging structure 24 can significantly improve its functionality and flexibility, adapt to work requirements of different heights and angles, and can be suitable for a variety of application scenarios.

[0046] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0047] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0048] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A guardrail for civil construction sites, characterized in that: It includes a guardrail frame and mounting mechanisms respectively provided on both sides of the guardrail frame, and the two mounting mechanisms each include: A column connected to the side of the guardrail frame; A movable inner rod, the bottom end of which is arranged inside the column and the top end extends outside the column, and can slide up and down along the inner wall of the column; a rotating frame rotatably disposed on the top surface of the movable inner rod; and The hanging frame structure includes a fixed section fixedly connected to the rotating frame, and a movable section movably connected to one side of the fixed section, and a hanging area that can be closed or opened is formed between the movable section and the fixed section.

2. The construction site guardrail according to claim 1, characterized in that: The guardrail frame includes a frame and several reflective guardrails. The two sides of the frame are respectively connected to the two columns of the mounting mechanism. The several reflective guardrails are arranged on the inner side of the frame and arranged in parallel along the length direction of the frame. The top and bottom ends of each reflective guardrail are connected to the frame.

3. The construction site guardrail according to claim 1, characterized in that: A first fixing bolt is threadedly connected to one side of the top end of the column, and one end of the first fixing bolt is tightly connected to the side surface of the movable inner rod to fix the movable inner rod.

4. The construction site guardrail according to claim 1, characterized in that: One end of the rotating frame is rotatably connected to a second fixing bolt, and is rotatably connected to the top end of the movable inner rod through the second fixing bolt. The second fixing bolt is threadedly connected to the top end of the movable inner rod.

5. The construction site guardrail according to claim 1, characterized in that: The fixed section of the bracket structure includes an inner bracket, and the movable section includes an outer bracket. The middle part of one side of the inner bracket is fixedly connected to one side of the rotating frame, one end of the inner bracket is rotatably connected to one end of the outer bracket, and the other end of the inner bracket is bolted to the other end of the outer bracket.

6. The construction site protection fence according to claim 5, characterized in that: The middle parts of the inner and outer pylons are bent outwards, so that a space for accommodating a hanging component is formed between the middle parts of the inner and outer pylons.

7. The construction site guardrail according to claim 1, characterized in that: The guardrail for civil construction sites also includes a support structure arranged at the bottom of the mounting mechanism, and the support structure includes a plurality of support members arranged on the outside of the column, one end of the support member is rotatably connected to the column, and its rotation stroke has a folded state close to the side of the column, and a support state in which it rotates downward from the folded state to support on the ground.

8. The construction site protection fence according to claim 7, characterized in that: Each of the support members includes a rotating seat, a base and a reinforcing pin. One end of the base is rotatably connected to the column through the rotating seat, and the other end of the base is movably connected to the reinforcing pin to fix the base by drilling the reinforcing pin into the ground.

9. The construction site protection fence according to claim 8, characterized in that: Each of the support members also includes an outer support rod, an inner support rod and a fixing sleeve, one end of the outer support rod is rotatably connected to the base, and the other end thereof is internally connected to the inner support rod, one end of the inner support rod protrudes from the outer support rod and is threadedly connected to the column, and the fixing sleeve is arranged between the outer support rod and the inner support rod to fix the inner support rod and the outer support rod.

10. The construction site protection fence according to claim 1, characterized in that: The upright post is connected to the guardrail frame through a connecting piece, and the connecting piece includes a connecting post and a connecting sleeve. The connecting post is arranged on the side of the guardrail frame. A connecting groove is opened on the upright post at a position corresponding to the connecting post, and the connecting sleeves are arranged on both sides of the upright post at positions corresponding to the connecting grooves. The connecting post passes through the connecting sleeve and the connecting groove and is fixedly connected to the connecting sleeve.

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