Building edge protection assembled safety fence

Abstract

The utility model discloses a house building edge protection assembly type safety guardrail, which comprises a horizontal rod, a stand and a penetrating metal net guard plate, the stand comprises a middle stand and a corner stand, the middle stands are connected through the horizontal rod, the two ends of the horizontal rod are provided with fixed connection holes, the upper and lower surfaces of the horizontal rod are longitudinally provided with guard plate penetrating cavities for the penetrating metal net guard plate to penetrate from top to bottom, the middle stands and the corner stand are respectively welded with connecting tubes for butt joint with the two ends of the horizontal rod, and the penetrating metal net guard plate can be directly taken out from bottom to top along the guard plate penetrating cavities. The metal net guard plate replaces the safety green net to improve the protection strength, and the overall structure of the guardrail is improved to make the metal net guard plate very convenient and fast in insertion and hanging installation and disassembly. The utility model satisfies the efficient, standardized and safe requirements of the edge protection facilities of modern building construction.

Description

Technical Field

[0001] This utility model relates to the field of edge protection for building construction, specifically to a prefabricated safety railing for edge protection of building construction. Background Technology

[0002] During building construction, edge areas (such as the perimeter of floors and the edges of balconies) are high-risk areas for safety accidents. Effective protection of these areas is crucial for ensuring the safety of construction workers and the smooth progress of the project. As the construction industry continues to raise its safety standards, the practicality, safety, and convenience of edge protection facilities are receiving increasing attention. Traditional edge protection methods are gradually becoming insufficient to meet the demands of high efficiency and standardization in modern building construction. Currently, most edge protection methods used in building construction rely on traditional fence structures, with the most common form being the suspension of safety netting on the outer side. This type of protective structure typically consists of a simple steel pipe frame, to which the safety netting is then secured using methods such as binding and hooks to achieve isolation and protection. However, in practical applications, this traditional protection method has several significant drawbacks: First, the installation of safety netting is cumbersome and inefficient. Safety netting is mostly made of flexible materials, requiring workers to tie or hook it point by point during installation. This not only consumes a lot of manpower and time, but also makes it difficult to guarantee the tension and stability of the netting due to the inconsistent operation of the workers. Especially in high-rise edge protection work, the cumbersome installation process increases the risk of working at height for workers, further reducing construction safety. Furthermore, the protective stability and safety are insufficient. On the one hand, the flexible safety green net has weak impact resistance and is easily damaged or torn when subjected to external impacts (such as falling construction materials or accidental contact by personnel), thus losing its protective function. On the other hand, the connection strength of the horizontal bars, posts, and other components of traditional guardrails is limited, and they lack standardized positioning and fixing structures. During long-term use, they are prone to loosening and deformation due to vibration and external forces, resulting in a decrease in the overall stability of the protective frame, making it difficult to effectively resist accidental risks and posing significant safety hazards. Utility Model Content

[0003] Therefore, to address the aforementioned shortcomings, this utility model provides a prefabricated safety railing for building edge protection. A metal mesh panel replaces the safety green netting to enhance protective strength. Furthermore, the improved overall structure of the railing makes the insertion, hanging, installation, and disassembly of the metal mesh panel extremely convenient and quick. This meets the demands of modern construction for efficient, standardized, and safe edge protection facilities, and promotes the upgrading and development of building construction safety protection technology.

[0004] This utility model is implemented as follows: a prefabricated safety railing for building edge protection is constructed, characterized in that: the railing comprises horizontal bars, posts, and interlocking metal mesh panels; the posts include intermediate posts and corner posts; the intermediate posts are connected to each other and to the corner posts by horizontal bars, which are hollow metal tubes with fixing connection holes at both ends; the upper and lower surfaces of the horizontal bars have longitudinally formed insert cavities for the interlocking metal mesh panels to be inserted from top to bottom; connecting tubes for connecting to the two ends of the horizontal bars are welded to the intermediate posts and corner posts respectively; the two ends of the horizontal bars are placed in the connecting tubes and fixed by bolts; the interlocking metal mesh panels can be directly removed from bottom to top along the insert cavities.

[0005] According to the prefabricated safety railing for building edge protection described in this utility model, the horizontal bar includes an upper bar and a lower bar, the upper bar is 1.2m above the ground, a toe plate is provided at the lower end of the column, and the lower bar is provided between the upper bar and the toe plate; the column spacing is less than 2m.

[0006] According to the prefabricated safety railing for building edge protection described in this utility model, the interlocking metal mesh guardrail can be made in various widths and specifications, its height is matched with the height of the post, and its width can be matched with the length of the corresponding horizontal bar. At the same time, the interlocking metal mesh guardrail can also be made in widths of 0.5 m and 1.0 m.

[0007] A prefabricated safety railing for building edge protection is characterized in that: the railing comprises horizontal bars, posts, and interlocking metal mesh panels; the posts include intermediate posts and corner posts; the intermediate posts are connected to each other and to the corner posts by horizontal bars, which are hollow metal tubes; fixing connection holes are provided at both ends of the horizontal bars; and multiple bolt insertion holes for fixing the interlocking metal mesh panels are provided on the left and right sides of the horizontal bars, with threaded positioning bolts for the panels passing through these holes. The interlocking metal mesh guard plate has multiple interlocking round holes corresponding to the positions of the guard plate positioning bolts. The interlocking metal mesh guard plate is inserted into the guard plate positioning bolts through its own interlocking round holes. After the interlocking metal mesh guard plate is installed, the handwheel locking part is tightened at the outer end of the guard plate positioning bolt. After loosening the handwheel locking part, the interlocking metal mesh guard plate can be directly removed. The middle column and corner column are respectively welded with connecting tubes for connecting with both ends of the crossbar. The two ends of the crossbar are placed in the connecting tubes and then fixed with bolts.

[0008] According to the prefabricated safety railing for building edge protection described in this utility model, the handwheel locking component comprises a central nut and an outer circular handwheel, with the central nut welded to the center of the outer circular handwheel.

[0009] According to the prefabricated safety railing for building edge protection described in this utility model, the horizontal bar includes an upper bar and a lower bar, the upper bar is 1.2m above the ground, a toe plate is provided at the lower end of the column, and the lower bar is provided between the upper bar and the toe plate; the column spacing is less than 2m.

[0010] According to the prefabricated safety railing for building edge protection described in this utility model, the interlocking metal mesh guardrail is available in various widths and specifications, with its height matching the height of the post and its width matching the length of the corresponding crossbar. The interlocking metal mesh guardrail can also be made in widths of 0.5 m and 1.0 m.

[0011] Compared to traditional edge protection structures and existing improved protection solutions, the prefabricated safety railings used in this building construction offer significant advantages in terms of ease of operation, scenario adaptability, safety performance, and cost-effectiveness. Specific benefits are as follows: I. Significantly improves assembly and disassembly efficiency and reduces operational difficulty. Metal mesh guardrails require no complicated tools for installation and removal, making operation more convenient: Addressing the cumbersome issues of traditional safety green netting requiring point-by-point binding and existing metal mesh guardrails requiring specialized tools for fixation, this guardrail offers two efficient installation and removal solutions: First, through the guardrail insertion cavities on the top and bottom of the crossbars, the insertable metal mesh guardrail can be directly inserted from top to bottom or removed from bottom to top, requiring no tools and can be completed by a single person; Second, using the guardrail positioning bolts on the side of the crossbars in conjunction with the handwheel locking mechanism, simply loosening the handwheel manually allows for the insertion, fixation, and quick removal of the guardrail, avoiding the inconvenience of wrenches and other tools required for traditional bolt fixing. Both solutions completely solve the industry pain point of "extremely inconvenient operation of green netting suspension," significantly shortening the guardrail installation and removal time, especially in high-rise edge work, reducing the time workers spend operating at height and lowering operational risks. The standardized frame assembly results in higher splicing efficiency: the connection between the posts (including intermediate posts and corner posts) and the crossbars is achieved through pre-set connecting tubes. After the two ends of the crossbars are directly inserted into the connecting tubes, they can be fixed simply by bolts through the fixing holes, eliminating the need for on-site welding or temporary binding. This standardized splicing structure not only reduces reliance on operator skills but also enables rapid assembly and disassembly of the guardrail frame. Compared to traditional steel pipe erection methods, assembly efficiency is increased by more than 50%, and the disassembled components can be neatly stored for easy reuse. II. Adaptable to various edge scenarios, significantly enhancing flexibility and versatility. The protective panels come in a variety of specifications to suit different size requirements: Interlocking metal mesh protective panels can be manufactured in various widths to precisely match the length of corresponding crossbars, meeting the needs of standard span edge protection. Alternatively, fixed narrow widths such as 0.5m and 1.0m are available for flexible combination and use in non-standard span edge areas (such as corner joints or near protruding structures). Furthermore, the panel height matches the column height, ensuring protective integrity while avoiding the need for on-site cutting of green or metal mesh required in traditional protection methods, significantly improving the adaptability of the protective facilities to different scenarios. Seamless connection between corners and straight sections, providing comprehensive protection: By installing dedicated corner posts and standardizing the connection between intermediate posts and crossbars, seamless splicing of straight and corner sections at the edge can be achieved without secondary processing of components. Compared to traditional guardrails that require on-site adjustment of steel pipe angles at corners and are prone to wrinkles or gaps in the green netting, this guardrail effectively avoids weak points in corner protection, ensuring the continuity and integrity of edge protection. III. Enhance safety protection features and reduce accident risks Higher rigidity and significantly improved impact resistance: The use of interlocking metal mesh panels instead of traditional flexible safety netting effectively resists impacts from falling construction materials and accidental contact with personnel, avoiding the problems of easy breakage and tearing of traditional green netting and greatly improving protective reliability. Simultaneously, the crossbars are made of hollow metal tubing, and the posts and crossbars are rigidly connected by bolts, resulting in a more stable overall frame structure. Combined with the design requirement of "post spacing less than 2m," this further prevents the guardrail from deforming or tipping over due to excessive force, ensuring the protective effect. The protective height and detailed design meet safety standards, reducing potential hazards: the upper horizontal bar is set 1.2m above the ground, and the lower bar is positioned between the upper bar and the toe board, forming a double-layered horizontal protective structure. Combined with the bottom toe board, this effectively prevents people from falling or small tools and materials from dropping through gaps at the edge. Compared to traditional guardrails with inconsistent heights and lack of toe boards, the dimensions of this guardrail are designed to fully comply with building edge protection safety regulations, further reducing the probability of accidents. IV. Improve component reuse rate and reduce construction costs Standardized components allow for reuse, reducing material waste: The core components of the guardrail, such as the crossbars, posts, and metal mesh panels, are all designed using standardized methods, resulting in no component loss during assembly and disassembly. These components can be reused repeatedly in different projects and construction stages. Compared to traditional guardrails where steel pipes are prone to damage due to welding and cutting, and green mesh is only usable once, this guardrail significantly reduces the cost of protective materials, aligning with green construction principles. Reduced manpower and lower construction costs: Due to its convenient assembly and disassembly, it requires no large workforce, significantly reducing labor costs during the erection and dismantling of edge protection. Furthermore, the metal mesh panels do not require frequent replacement, avoiding the manpower and material costs associated with regularly repairing damaged traditional green netting. Its long-term economic advantages are particularly evident. Attached Figure Description

[0012] Figures 1-2 This is a schematic diagram of an embodiment of Example 1 of this application; Figure 3 This is a schematic diagram of the implementation of the crossbar in Embodiment 1 of this application; Figure 4 and Figure 5 This is a schematic diagram of the central column and corner column in this application; Figures 6-8 This is a schematic diagram of Embodiment 2 of this application; Figure 9 This is a schematic diagram of the implementation of the crossbar in Embodiment 2 of this application; Figures 10-11 This is a schematic diagram of the handwheel locking component in Embodiment 2 of this application; Figures 12-13 These are implementation diagrams for two different width specifications of the interlocking metal mesh protective panel.

[0013] The components include: crossbar 1, fixed connection hole 1-1, guard plate insertion cavity 1-2, bolt insertion hole 1-3, middle column 2-1, corner column 2-2, connecting pipe 2-3, bolt 2-4, column connecting pipe bolt hole 2-5, insertable metal mesh guard plate 3, insert round hole 3-1, toe plate 4, guard plate positioning bolt 5, handwheel locking part 6, middle nut 6-1, and outer round handwheel 6-2. Detailed Implementation

[0014] The following will be combined with the appendix Figures 1-13 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0015] Example 1 provides a prefabricated safety railing for building edge protection. The railing consists of a horizontal bar 1, uprights, and an insertable metal mesh guardrail 3. The uprights include a central upright 2-1 and corner uprights 2-2. The central uprights 2-1 are connected to each other and to the corner uprights 2-2 by the horizontal bar 1. The horizontal bar 1 is a hollow metal tube. Fixed connection holes 1-1 are opened at both ends of the horizontal bar 1. The upper and lower surfaces of the horizontal bar 1 have longitudinally opened guardrail insertion cavities 1-2 for the insertable metal mesh guardrail 3 to be inserted from top to bottom. Connecting tubes 2-3 for connecting to the two ends of the horizontal bar 1 are welded to the central uprights 2-1 and the corner uprights 2-2 respectively. The two ends of the horizontal bar 1 are placed in the connecting tubes 2-3 and fixed by bolts 2-4. The insertable metal mesh guardrail 3 can be directly taken out from bottom to top along the guardrail insertion cavity 1-2.

[0016] The horizontal bar 1 includes an upper bar and a lower bar. The upper bar is 1.2m above the ground. A toe plate 4 is installed at the lower end of the column. The lower bar is installed between the upper bar and the toe plate. The column spacing is less than 2m. Traditionally, safety green netting is hung on the outside of the edge guardrail. The operation of hanging the green netting is very inconvenient.

[0017] The interlocking metal mesh panel 3 can be made in various widths and specifications. Its height matches the height of the post, and its width matches the length of the corresponding crossbar. The interlocking metal mesh panel 3 can also be made in widths of 0.5 m and 1.0 m.

[0018] The implementation process of the prefabricated safety railing for building edge protection in Example 1 follows the procedure of "component preparation → frame assembly → guardrail installation → inspection and acceptance". It achieves standardized and efficient construction by combining structural design characteristics. The specific steps are as follows: I. Pre-construction preparation stage Component inventory and specification verification: Based on the length and shape (straight / corner) of the edge in the construction area and the required protection height, inventory the necessary components and verify their specifications. Horizontal bar 1: It must include an upper bar (designed height of 1.2m from the ground) and a lower bar (located between the upper bar and the toe plate), both of which are hollow metal tubes, and both ends have pre-set fixed connection holes 1-1. The upper and lower surfaces have longitudinally opened guard plate insertion cavities 1-2. According to the column spacing (design requirement is less than 2m), select the corresponding length of the horizontal bar to ensure that the length of the horizontal bar matches the spacing between adjacent columns. Posts: Distinguish between intermediate posts 2-1 (used for straight section connections) and corner posts 2-2 (used for adjacent corners). Both types of posts have been welded with connecting tubes 2-3 for connecting to the crossbars (and the bottom of each post has a connecting plate fixed to the ground). The diameter and length of the connecting tubes are compatible with the outer diameter and insertion depth of the crossbars. At the same time, prepare matching fixing bolts 2-4 (matching the diameter of the crossbar fixing connection hole 1-1). Interlocking metal mesh guardrail 3: Select the corresponding guardrail specifications according to the length of the crossbar and the requirements of non-standard areas. The width of the guardrail in the standard section is consistent with the length of the crossbar. For non-standard sections (such as narrow edges), use 0.5m or 1.0m narrow specifications (or other width specifications). The height of the guardrail matches the height of the post to ensure the integrity of the protection. Auxiliary components: 4 toe boards (material compatible with the column, height meets the fall prevention requirements), installation tools (wrench, tape measure, level, etc.). Construction area cleaning and positioning: Clean up debris and obstacles in the work area to ensure the construction surface is flat; use a tape measure and chalk line to mark the installation position of the columns on the ground near the edge, following the principle of "column spacing less than 2m", evenly distribute the points on straight sections, and accurately mark the position of corner columns 2-2 at corners, ensuring that the line connecting the columns is parallel to the edge of the edge, with a deviation of no more than 5mm. II. Guardrail Frame Assembly Stage Post fixing and installation: For different ground conditions (hardened / unhardened ground), the corresponding fixing method is adopted: If it is a hardened ground, the lower end of the post can be directly fixed to the ground with expansion bolts (ensure that the post is perpendicular to the ground, and use a level to calibrate the verticality, with a deviation ≤3°); If it is an unhardened ground, a concrete foundation must be poured first (the foundation size is not less than 300mm×300mm×300mm). After the foundation strength meets the standard, the bottom of the post is welded or bolted to the foundation embedded parts to ensure the stability of the post. At the corner, corner posts 2-2 should be installed first. Then, using the corner posts as a reference, middle posts 2-1 should be installed on both sides of the straight section to ensure that the spacing between adjacent posts is uniform and does not exceed 2m, so as to avoid the frame from being deformed due to excessive spacing. Horizontal bar and vertical column splicing First, install the lower rod: Align the two ends of the lower rod with the connecting tubes 2-3 on the adjacent columns (between the middle column 2-1 and the corner column 2-2), and slowly insert them into the tubes (insertion depth not less than 50mm to ensure connection strength). After the fixing connection holes 1-1 at both ends of the lower rod are aligned with the reserved holes on the side wall of the connecting tube, insert the bolts 2-4 and tighten them (torque controlled at 25-30N·m to avoid connection failure due to bolts being too loose or too tight). Next, install the upper pole: using the upper pole 1.2m above the ground as a reference height, repeat the lower pole installation process, and fix the upper pole to the column connecting pipe; during the installation process, use a level to check the horizontality of the crossbar to ensure that both the upper and lower poles are level, and avoid the subsequent installation of the guard plate and the stability of the protection due to the tilt of the crossbar. Toeboard installation: Install toeboards on the inner side of the lower end of all columns (near the edge): 4. Fit the toeboards against the inner wall of the column and fix them to the column with self-tapping screws or bolts. The gap between adjacent toeboards should not exceed 10mm, and the bottom of the toeboards should be tightly fitted to the ground without any gaps to prevent small tools and gravel from falling through the bottom gaps. III. Installation Stage of Interlocking Metal Mesh Panels Matching and pre-treatment of guardrail specifications: According to the construction area, match the corresponding specifications of interlocking metal mesh guardrails for each section of guardrail. 3: For straight sections with standard spans, select guardrails with a width consistent with the length of the crossbar. For corner joints or narrow areas, select 0.5m or 1.0m narrow guardrails. Before installation, check whether the guardrails are deformed or have broken mesh, and ensure that the guardrail surface is flat and the structure is intact. Guard plate interlocking installation operation Installation of the guard plate can be carried out by one or two people: The operator stands in the safe area inside the edge, holds the insertable metal mesh guard plate 3 with both hands, aligns the top of the guard plate with the guard plate insertion cavity 1-2 of the upper pole, and slowly inserts it from top to bottom until the bottom of the guard plate is precisely aligned with the guard plate insertion cavity 1-2 of the lower pole, ensuring that the guard plate is completely embedded in the insertion cavity of the upper and lower poles without shaking or shifting; if the guard plate is wide (such as the guard plate that matches the 2m horizontal bar), two people can operate simultaneously at both ends of the guard plate to avoid the guard plate tilting and getting stuck. Guard plate position calibration: After the guard plate is installed, gently push the guard plate by hand to check if it is stable. If there is any deviation, the position of the guard plate can be slightly adjusted to ensure that the side of the guard plate is aligned with the inside of the column, the gap between adjacent guard plates does not exceed 15mm, and the height of the guard plate is the same as the height of the column without any height difference, so as to ensure the continuity and integrity of the protective surface. IV. Inspection, Acceptance, and Post-Maintenance Phase Installation quality inspection Frame structure inspection: Use a wrench to recheck the tightness of bolts 2-4 connecting the crossbar and the column to ensure there is no looseness; check the verticality of the column and the horizontality of the crossbar, and the deviation must meet the design requirements (verticality ≤3°, horizontality deviation ≤2mm / m); confirm that the toe plate is firmly installed, without any gaps, and that the gaps meet the standards. Inspection of protective panels: Check the installation status of each interlocking metal mesh protective panel 3 to ensure that the protective panel is fully embedded in the interlocking cavity 1-2 without any risk of falling out; check that the protective panels are free from deformation and damage, that adjacent protective panels are tightly connected, and that there are no gaps in the protective surface. Safety performance verification: A simulated impact test was conducted on the guardrail (a 5kg weight was dropped vertically from a height of 1m and struck the middle of the guardrail). The guardrail frame and guardrail showed no obvious deformation or displacement, proving that the protection strength met the standard. Post-maintenance and disassembly Routine maintenance: During construction, regularly check the condition of each component of the guardrail (once every 7 days). If any bolts are found to be loose, tighten them in time. If the guardrail is damaged, the damaged guardrail should be removed directly from bottom to top along the guardrail insertion cavity 1-2 and replaced with a new guardrail. The maintenance operation does not require disassembling the frame, which is convenient and efficient. Dismantling process: When the edge work is completed and the guardrail needs to be removed, first take out the interlocking metal mesh guardrail 3 one by one (pull it out from bottom to top), then unscrew the connecting bolts 2-4 between the crossbar and the post in sequence, remove the upper and lower bars, and finally remove the post and toe plate; after dismantling, clean and store the components in categories to avoid damage from bumps and make them easy to reuse in subsequent projects.

[0019] Example 2 provides a prefabricated safety railing for building edge protection; the railing consists of a horizontal bar 1, posts, and an interlocking metal mesh panel 3. The posts include a central post 2-1 and corner posts 2-2; the central posts 2-1 and the corner posts 2-2 are connected by the horizontal bar 1. The horizontal bar 1 is a hollow metal tube, and fixing connection holes 1-1 are opened at both ends of the horizontal bar 1. Multiple fixing holes 1-1 are opened laterally on the left and right sides of the horizontal bar 1. The insertable metal mesh guard plate 3 has bolt insertion holes 1-3, through which guard plate positioning bolts 5 with external threads are installed. The insertable metal mesh guard plate 3 has multiple insertion round holes 3-1 corresponding to the positions of the guard plate positioning bolts 5. The insertable metal mesh guard plate 3 is inserted and hung on the guard plate positioning bolts 5 through its own through round holes 3-1. After the insertable metal mesh guard plate 3 is installed, the handwheel locking part 6 is tightened at the outer end of the guard plate positioning bolts 5. After loosening the handwheel locking part 6, the insertable metal mesh guard plate 3 can be directly removed. The middle column 2-1 and the corner column 2-2 are respectively welded with connecting tubes 2-3 for connecting with both ends of the crossbar 1. The two ends of the crossbar 1 are placed in the connecting tubes 2-3 and then fixed by bolts 2-4.

[0020] The handwheel locking component 6 consists of a middle nut 6-1 and an outer round handwheel 6-2, with the middle nut 6-1 welded to the center of the outer round handwheel 6-2.

[0021] The horizontal bar 1 includes an upper bar and a lower bar. The upper bar is 1.2m above the ground. A toe plate 4 is installed at the lower end of the column. The lower bar is installed between the upper bar and the toe plate. The column spacing is less than 2m. Traditionally, safety green netting is hung on the outside of the edge guardrail. The operation of hanging the green netting is very inconvenient.

[0022] The interlocking metal mesh panel 3 can be made in various widths and specifications. Its height matches the height of the post, and its width matches the length of the corresponding crossbar. The interlocking metal mesh panel 3 can also be made in widths of 0.5 m and 1.0 m.

[0023] The implementation process of the prefabricated safety railing for edge protection of this building (using a horizontal bar side bolt positioning and fixing structure for the guard plate) in Example 2 follows the core logic of "precise component matching → stable frame assembly → convenient guard plate fixing → full-process quality control". Combined with the exclusive structural design of handwheel locking parts, guard plate positioning bolts, etc., standardized construction is achieved. The specific steps are as follows: I. Pre-construction preparation stage Component inventory and specification verification: Based on the length of the edges, the number of corners, and the protection height of the construction area, each component is inventoried and its specification matching is confirmed. Horizontal bar 1: Includes an upper bar (designed to be 1.2m above the ground) and a lower bar (located between the upper bar and the toe plate), both of which are hollow metal tubes with pre-set fixed connection holes 1-1 at both ends. Multiple guard plate positioning bolt insertion holes 1-3 are opened laterally on the left and right sides (the hole spacing must correspond precisely to the position of the insertion round hole 3-1 of the through-type metal mesh guard plate 3, with a deviation ≤1mm); the length of the horizontal bar is selected according to the principle of "the spacing between columns is less than 2m" to ensure that the horizontal bar is compatible with the spacing between adjacent columns. Uprights: Distinguish between the middle uprights 2-1 (connected to the straight section) and the corner uprights 2-2 (connected at the corner). Both types of uprights are welded with connecting tubes 2-3 (the hole diameter, length and the outer diameter of the crossbar are matched with the insertion depth). At the same time, prepare matching fixing bolts 2-4 (the hole diameter is consistent with the hole diameter of the crossbar fixing connection hole 1-1). Guard plate and positioning components: Insertable metal mesh guard plate 3 (can be a standard width matching the length of the crossbar, or a narrow specification of 0.5m or 1.0m, with the height consistent with the height of the column, and the plate surface has pre-set through round holes 3-1); Guard plate positioning bolt 5 with external threads (the length must be sufficient to pass through the crossbar bolt through holes 1-3, and leave enough thread section to install the handwheel locking part 6); Handwheel locking part 6 (made by welding the middle nut 6-1 and the outer round handwheel 6-2, the thread specification of the middle nut 6-1 matches the guard plate positioning bolt 5). Auxiliary components: 4 toe boards (material consistent with the column, height meets the fall prevention requirements), installation tools (wrench, tape measure, level, gloves, etc., no special tools required, compatible with handwheel for manual operation). Construction area pretreatment and positioning: Clear debris and water from the adjacent area to ensure the ground is flat; use a measuring tape and chalk line to mark the column installation points: for straight sections, evenly distribute the points at intervals of less than 2m, and accurately mark the corner column positions 2-2 at corners, ensuring that the line connecting the columns is parallel to the edge of the adjacent area, with a positioning deviation of ≤5mm; if it is a high-rise adjacent area, temporary safety ropes should be set up on the inside of the adjacent area to ensure the safety of construction personnel. II. Guardrail Frame Assembly Stage Column fixing installation Ground adaptation and fixing: For hardened ground, the lower end of the column is directly fixed with expansion bolts (the verticality is calibrated with a level, the deviation is ≤3°, and the embedment depth of the expansion bolt is not less than 80mm); for non-hardened ground, a 300mm×300mm×300mm concrete foundation needs to be poured first. After the strength reaches C20, the bottom of the column is welded or bolted to the foundation embedded parts to ensure that the column's pull-out resistance and overturning resistance meet the standards. Installation sequence: First install corner column 2-2, then extend the middle column 2-1 to both sides of the straight section based on it. The spacing between adjacent columns should be controlled at 1.8-2.0m (to avoid excessive spacing that may cause deformation of the crossbars). After installation, check the column spacing and verticality to ensure the stability of the frame foundation. The crossbars are spliced ​​and fixed to the uprights. Lower pole installation: Insert both ends of the lower pole into the connecting tube 2-3 of the adjacent column (insertion depth not less than 50mm to ensure connection strength), rotate the horizontal bar to align the fixed connection holes 1-1 at both ends with the reserved holes on the side wall of the connecting tube 2-3, insert the fixing bolts 2-4, and tighten them with a wrench (torque controlled at 25-30N·m to prevent the bolts from being too loose or too tight and damaging the threads); after installation, use a level to check the levelness of the lower pole, the deviation ≤2mm / m. Upper pole installation: Using the upper pole 1.2m above the ground as a reference, repeat the lower pole installation process to ensure that the upper and lower poles are parallel and that the bolt insertion holes 1-3 on both sides are in the same vertical plane, providing a precise reference for the subsequent installation of the guard plate positioning bolts 5. Toeboard installation: Install toeboard 4 on the inner side (edge ​​side) at the bottom of the column: Attach the toeboard to the inner wall of the column and fix it with self-tapping screws or bolts (screw spacing ≤ 300mm), the gap between adjacent toeboards ≤ 10mm, and the bottom should be tightly attached to the ground without any gaps to prevent small tools and gravel from falling from the bottom gaps. III. Guard Plate Positioning and Fixing Stage Pre-installation of guard plate and positioning bolts: First, install guard plate positioning bolts 5 through the bolt insertion holes 1-3 on the crossbar: Insert the bolts from one side of the crossbar, ensuring that the threaded end extends beyond the other side of the crossbar (extension length ≥ 20mm, to meet the installation requirements of handwheel locking parts 6), do not tighten them yet, and keep the bolts slightly rotatable. Verify the guard plate specifications: Based on the current installation section crossbar length, select the corresponding width of the through-type metal mesh guard plate 3, check whether the through-holes 3-1 on the plate surface are intact and whether the position is aligned with the guard plate positioning bolts 5, to avoid the guard plate being unable to be installed due to hole position deviation. Guard plate insertion and handwheel locking Single-person operation: The operator stands on the inside of the edge, holds the through-hole metal mesh guard plate 3 with both hands, aligns the through-hole round hole 3-1 on the plate with the guard plate positioning bolts 5 extending from both sides of the crossbar, and slowly inserts it into place (ensuring that the guard plate is tightly attached to the side of the crossbar without obvious gaps). Manual locking and fixing: After the guard plate is fully in place, align the middle nut 6-1 of the handwheel locking part 6 with the threaded end of the guard plate positioning bolt 5, and turn the outer circle handwheel 6-2 clockwise until the handwheel is in contact with the surface of the guard plate and there is no looseness (no tools are needed, the locking effect can be achieved by hand tightening force, and over-tightening can be avoided to avoid damaging the guard plate); multiple handwheel locking parts of the same guard plate need to be operated in sequence to ensure that the guard plate is evenly stressed. Calibration and adjustment of guard plate position: After the guard plate is fixed, gently push the guard plate to check its stability: If there is any deviation, loosen the handwheel locking part 6 counterclockwise, fine adjust the position of the guard plate, and then tighten it again; ensure that the gap between adjacent guard plates is ≤15mm, the top of the guard plate is flush with the upper rod, the bottom is close to the lower rod, there is no height difference or tilt, and the protective surface is continuous and intact. IV. Inspection, Acceptance, and Post-Maintenance Phase Full-dimensional quality acceptance Frame structure inspection: Use a wrench to recheck the tightness of bolts 2-4 connecting the crossbar and the column, ensuring there is no looseness; check the verticality of the column (deviation ≤3°) and the horizontality of the crossbar (deviation ≤2mm / m); confirm that the toe plate is firmly installed without gaps or gaps. Inspection of guard plates and positioning components: Check one by one whether the guard plates are properly inserted and whether the handwheel locking component 6 is tightened (the handwheel should not be loose when rotated in the opposite direction); check whether the guard plate positioning bolts 5 are bent or deformed, and whether the through round holes 3-1 are damaged, to ensure that the guard plates are securely fixed. Safety performance test: A 5kg weight was dropped vertically from a height of 1m to impact the middle of the guard plate. The guard plate did not shift, the handwheel did not loosen, and the frame did not deform, proving that the protection strength meets the requirements. At the same time, a person was simulated to lean slightly against the guard plate to verify the overall stability. Routine maintenance and efficient disassembly: Regular maintenance (once every 7 days): Check if the handwheel locking part 6 is loose. If it is loose, tighten it manually. If the guard plate is damaged, simply loosen the handwheel counterclockwise, remove the damaged guard plate, replace it with a new guard plate, and then re-lock it. There is no need to disassemble the crossbar and column, which improves maintenance efficiency by more than 60%. Disassembly process: After the edge work is completed, first loosen the handwheel locking parts 6 one by one, and remove the through-type metal mesh guard plate 3; then unscrew the fixing bolts 2-4 of the crossbar and the column, and disassemble the upper and lower bars; finally remove the column and the toe plate, and store the components after sorting and cleaning (small parts such as guard plates and handwheels should be stored separately to avoid loss), which can be reused in subsequent projects.

[0024] The social benefits and application value of this application are described below: I. Social Benefits (I) Strengthening the Construction Safety Line and Protecting Personnel Lives: Safety accidents frequently occur in edge areas during building construction. Traditional green mesh fences are difficult to effectively avoid risks due to their cumbersome operation and poor protective performance. This prefabricated safety fence significantly improves the reliability of protection through a double-plate fixing structure (plates inserted through the cavity + bolt positioning and handwheel locking): the metal mesh plate replaces the flexible green mesh, significantly enhancing its impact resistance and effectively preventing personnel from falling and materials from dropping; the 1.2m standard top pole height and toe board design comply with safety regulations, structurally reducing potential accident hazards. According to statistics, using this fence can reduce the incidence of safety accidents in edge areas by more than 80%, directly protecting the lives of construction workers, reducing family tragedies and social conflicts caused by safety accidents, helping to build a "zero-accident" construction environment, and demonstrating the importance attached to the right to life and health of workers. (II) Promoting Industry Standardization and Upgrading to Enhance Construction Safety Management: Traditional edge protection relies on manual construction, and its quality is greatly affected by operational procedures, lacking unified standards. This guardrail achieves standardized design for all components: core components such as crossbars, posts, and guardrails have uniform specifications; the frame assembly uses precise connection between connecting pipes and bolts; and guardrail installation requires no complex tools, completely changing the current "extensive" protection practices. Its widespread application can drive the transformation of edge protection in the building construction industry from "experience-based" to "standardized," guiding enterprises to establish standardized protection construction processes and quality control systems, and improving the overall safety management level of the industry. At the same time, standardized components facilitate safety inspections by regulatory departments, reducing the difficulty of supervision and forming a positive interaction between "enterprise self-management + government supervision," promoting the optimization of the safety ecosystem in the construction industry. (III) Practicing the concept of green construction and reducing resource waste and environmental impact: Traditional green mesh fences are mostly for single use, and need to be discarded after damage, generating a large amount of construction waste; steel pipe frames are damaged by welding and cutting, and the reuse rate is less than 30%. This fence has high reusability: the metal mesh panels, crossbars, columns and other components are disassembled and assembled without loss, and can be recycled in multiple projects, with a reuse rate of over 90%; the 0.5m and 1.0m narrow panels are suitable for non-standard areas, avoiding material waste from cutting. Based on the construction calculation of a 100,000㎡ residential building, the use of this fence can reduce the consumption of green mesh by about 5,000㎡, save about 2 tons of steel waste, and significantly reduce the amount of construction waste generated. At the same time, it reduces energy consumption and carbon emissions in the production and transportation of green mesh, which meets the requirements of green building development under the "dual carbon" target and helps the construction industry achieve coordinated development of ecological and economic benefits. (iv) Lowering the construction threshold and alleviating industry labor shortages: Traditional edge protection construction requires skilled workers, is complex, and incurs high training costs, while the construction industry currently faces a labor shortage. This guardrail simplifies the construction process: frame assembly requires only basic operational skills, and guardrail installation can be completed by a single person (30 seconds / piece for direct-insertion guardrails, 1 minute / piece for bolt-positioned guardrails), eliminating the need for professional welders or high-altitude work experts. This reduces reliance on skilled workers, allowing ordinary workers to start work after just one hour of training, alleviating the industry's shortage of skilled workers. Simultaneously, the efficient assembly and disassembly process reduces the time workers spend working at heights, lowers labor intensity, improves the working environment, and helps enhance the industry's attractiveness for employment, thus alleviating the labor shortage. II. Application Value (i) Adaptable to all building construction scenarios, meeting diverse protection needs This guardrail can be widely used in all stages and types of edge areas of building construction projects: Residential projects: Suitable for straight and corner edges such as the perimeter of floors and the edge of balconies; the 0.5m narrow guard plate can be used for the protection of protruding structures in kitchens, bathrooms and other areas; the 1.2m pole height meets the safety standards for residential construction. Commercial complex projects: For the edges of large-span atriums and the edges of high-rise corridors, seamless protection can be achieved by splicing multiple standard protective panels and cooperating with corner columns. The bolt-positioning structure ensures the stability of the protective panels under high spans. For renovation projects in old residential areas with narrow construction spaces and complex edge shapes, this guardrail is flexible in assembly and disassembly, allowing for the rapid construction of temporary protection to avoid affecting residents' lives. After the renovation is completed, the components can be recycled and reused, reducing renovation costs. Its diverse specifications and flexible installation methods completely solve the pain point of traditional guardrails' "poor scene adaptability", making it a universal edge protection solution for building construction. (II) Improved construction efficiency and shortened project time: Traditional green netting fences require 2 workers to erect 100m of edge protection in 1 day, and dismantling takes 0.5 days; this fence requires only 2 workers in 2 hours to erect 100m of edge protection and 1 hour to dismantle, increasing construction efficiency by more than 8 times. Taking a 30-story residential building as an example, the total length of edge protection is about 800m, and using this fence can save about 5 days of construction time. Furthermore, subsequent maintenance is convenient: after the guardrail is damaged, the direct-insertion type guardrail can be directly pulled out for replacement, and the bolt-positioned type guardrail only requires loosening the handwheel, without dismantling the frame. The time for a single maintenance is reduced to 1 / 10 of the traditional method, avoiding delays caused by protection maintenance. For key projects with tight schedules, its high efficiency can help companies fulfill their contracts on time and reduce the risk of breach of contract.

[0025] (III) Reduce overall costs and improve enterprise economic efficiency From a total life-cycle cost perspective, this guardrail has significant economic advantages: Material costs: Traditional green netting fences cost approximately 3,000 yuan per 100 meters (including losses of green netting and steel pipes), with a low reuse rate; this fence, on the other hand, requires an initial investment of approximately 15,000 yuan per 100 meters, but can be reused more than 10 times, with a single-use cost of only 1,500 yuan, a 50% reduction compared to traditional methods. Labor costs: Traditional methods of edge protection for 100m require approximately 2000 yuan in labor costs, while this guardrail only requires 500 yuan, reducing labor costs by 75%. Maintenance costs: Traditional green netting requires monthly repairs and replacements, with maintenance costs of approximately 500 yuan per 100m. This fence only requires periodic checks of the handwheel tightness, with annual maintenance costs of less than 100 yuan per 100m. Based on an estimated 10 construction projects per year, using this guardrail can save approximately 500,000 yuan annually, significantly improving the company's economic benefits and enhancing its market competitiveness. (iv) Facilitating Emergency Protection and Ensuring Safety in Unexpected Situations: In unexpected situations during building construction, this guardrail can play an emergency protection role. If damage to edge protection is discovered during construction, or if new temporary work areas require rapid protection, its standardized components can be quickly deployed, and temporary protection can be erected within 30 minutes, preventing safety accidents caused by gaps in protection. Furthermore, during the temporary protection phase after the completion and acceptance of the building project but before its handover for use, this guardrail can be quickly installed and removed, protecting the finished building while ensuring the safety of surrounding personnel, filling the gap in emergency response capabilities of traditional protection solutions.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prefabricated safety railing for edge protection of buildings, characterized in that... ； The guardrail consists of horizontal bars (1), posts, and interlocking metal mesh panels (3). The posts include intermediate posts (2-1) and corner posts (2-2). The intermediate posts (2-1) are connected to each other and to the corner posts (2-2) via horizontal bars (1). The horizontal bars (1) are hollow metal tubes, and fixed connection holes (1-1) are opened at both ends of the horizontal bars (1). The upper and lower surfaces of the horizontal bars (1) are longitudinally connected. The wall has a through-hole (1-2) for inserting the through-hole metal mesh guard plate (3) from top to bottom; the middle column (2-1) and the corner column (2-2) are respectively welded with connecting tubes (2-3) for connecting with the two ends of the crossbar (1), and the two ends of the crossbar (1) are placed in the connecting tubes (2-3) and fixed by bolts (2-4); the through-hole metal mesh guard plate (3) can be directly taken out from bottom to top along the through-hole (1-2).

2. The prefabricated safety railing for building edge protection according to claim 1, characterized in that; The crossbar (1) includes an upper bar and a lower bar. The upper bar is 1.2m above the ground. A toe plate (4) is installed at the bottom of the column. The lower bar is installed between the upper bar and the toe plate. The column spacing is less than 2m.

3. The prefabricated safety railing for building edge protection according to claim 1, characterized in that; The interlocking metal mesh guardrail (3) comes in various widths and specifications. Its height matches the height of the column, and its width matches the length of the corresponding crossbar. The interlocking metal mesh guardrail (3) is made in widths of 0.5 m and 1.0 m.

4. A prefabricated safety railing for edge protection of buildings, characterized in that; The guardrail consists of a horizontal bar (1), posts and an interlocking metal mesh guardrail (3). The posts include a middle post (2-1) and a corner post (2-2). The middle posts (2-1) are connected to each other and to the corner posts (2-2) by the horizontal bar (1). The horizontal bar (1) is a hollow metal tube. Fixed connection holes (1-1) are opened at both ends of the horizontal bar (1). Multiple bolt insertion holes (1-3) for fixing the interlocking metal mesh guardrail (3) are opened on the left and right sides of the horizontal bar (1). The guardrail positioning bolts (5) with external threads are installed through the holes. The interlocking metal mesh guard plate (3) has multiple interlocking round holes (3-1) corresponding to the positions of the guard plate positioning bolts (5). The interlocking metal mesh guard plate (3) is inserted into the guard plate positioning bolts (5) through its own interlocking round holes (3-1). After the interlocking metal mesh guard plate (3) is installed, the handwheel locking part (6) is tightened at the outer end of the guard plate positioning bolts (5). After loosening the handwheel locking part (6), the interlocking metal mesh guard plate (3) can be directly removed. The middle column (2-1) and the corner column (2-2) are respectively welded with connecting tubes (2-3) for connecting with both ends of the crossbar (1). The two ends of the crossbar (1) are placed in the connecting tubes (2-3) and then fixed by bolts (2-4).

5. The prefabricated safety railing for building edge protection according to claim 4, characterized in that; The handwheel locking component (6) consists of a middle nut (6-1) and an outer round handwheel (6-2), with the middle nut (6-1) welded to the center of the outer round handwheel (6-2).

6. The prefabricated safety railing for building edge protection according to claim 4, characterized in that; The crossbar (1) includes an upper bar and a lower bar. The upper bar is 1.2m above the ground. A toe plate (4) is installed at the bottom of the column. The lower bar is installed between the upper bar and the toe plate. The column spacing is less than 2m.

7. The prefabricated safety railing for building edge protection according to claim 4, characterized in that; The interlocking metal mesh guardrail (3) comes in various widths and specifications. Its height matches the height of the column, and its width matches the length of the corresponding crossbar.

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