Jacking type edge protection frame capable of automatically adjusting length

Abstract

The invention discloses a back shore type edge protection frame capable of automatically adjusting the length, which comprises small protection transverse rods, large protection transverse rods, protection vertical rods, lug plates and a top support, the small protection transverse rods are connected with the large protection transverse rods, a plurality of small protection transverse rods are vertically connected with one protection vertical rod, a plurality of large protection transverse rods are vertically connected with the other protection vertical rod, and the lug plates are connected with the top support. The end, away from the large protection cross rod, of the small protection cross rod is connected with a lug plate, and the end, away from the small protection cross rod, of the large protection cross rod is connected with a jacking. The protective device has the beneficial effects that the small protective cross rod and the large protective cross rod are in hollow nested sliding fit and can be flexibly adjusted in length and firmly positioned in cooperation with the first plug pin hole, the second plug pin hole and the plug pin, accurate adjustment is guaranteed through the graduated scale of the small protective cross rod, and the groove-shaped connecting joints of the protective vertical rods are fastened with the U-shaped steel pipe fastener bolts, so that the connecting cross rods can be stably connected; the lug plates are fixed to the wall face, the jacking supports abut against the wall face, stability is improved through double fixing, the rectangular bottom plate is welded to the bottoms of the protection vertical rods, and solid supporting is provided.

Description

Technical Field

[0001] This invention relates to the field of building engineering safety protection technology, and in particular to a top-supported edge protection frame with automatically adjustable length. Background Technology

[0002] Using standard steel pipes, couplers, and scaffolding boards commonly used in construction scaffolding, guardrails are manually assembled on-site. Their safety heavily relies on the workers' sense of responsibility and skill level. Manually assembled guardrails are prone to problems such as insufficient guardrail height, excessive spacing between posts, and loose couplers, resulting in "formalistic protection" and leaving safety hazards. Steel pipes and couplers are easily deformed, damaged, and lost during repeated disassembly, assembly, and transportation. The extensive inventory, repair, and replenishment work incurs significant hidden management costs and material rental and purchase costs.

[0003] For example, a Chinese patent discloses an edge protection frame (application number: CN201721214014.9), which includes a telescopic structure, connecting blocks fixedly connected to both ends of the telescopic structure, and a connecting structure. The telescopic structure includes a kit and rods slidably disposed within the kit. The kit and rods are locked together by a locking assembly. The telescopic structure is slidably provided with connecting columns for connecting to the ground via the connecting structure. The telescopic structure allows for changes in the protection range of the frame, adapting to various protection positions. The connecting structure connects to the connecting columns for ground contact, allowing the frame to be placed on the ground. After determining the protection range, the telescopic structure is locked using the locking assembly, thus achieving the effect of locking the telescopic structure.

[0004] Therefore, it is necessary to propose a top-supported edge protection frame with automatically adjustable length to address the above problems. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a top-supported edge protection frame with automatically adjustable length to solve the above problems.

[0006] An automatically adjustable length top-supported edge protection frame includes small protective horizontal bars, large protective horizontal bars, protective vertical bars, ear plates, and a top support. The small protective horizontal bars are connected to the large protective horizontal bars. Multiple small protective horizontal bars are perpendicularly connected to one protective vertical bar. Multiple large protective horizontal bars are perpendicularly connected to another protective vertical bar. Ear plates are connected to the ends of the small protective horizontal bars away from the large protective horizontal bars, and top supports are connected to the ends of the large protective horizontal bars away from the small protective horizontal bars. Preferably, both the small protective crossbar and the large protective crossbar are hollow structures, the outer diameter of the small protective crossbar is adapted to the inner diameter of the large protective crossbar, and the small protective crossbar is slidably sleeved inside the large protective crossbar.

[0007] Preferably, the side wall of the small protective crossbar is provided with a plurality of first pin holes, and the side wall of the large protective crossbar is provided with a second pin hole. The first pin holes and the second pin holes are inserted through the pin, and the upper end of the pin is provided with a pin cap, and the pin cap is provided with a lifting lug.

[0008] Preferably, the protective vertical rod is provided with multiple connecting nodes at intervals, and the connecting nodes are in the shape of grooves.

[0009] Preferably, both the small and large protective horizontal bars are connected to the connecting nodes on the protective vertical bars and fixed with steel pipe fasteners.

[0010] Preferably, the ear plate is fixed to the wall by expansion bolts.

[0011] Preferably, the top support includes a screw, a support plate, and a rotating handle. One end of the screw is threadedly connected to the threaded end of the large protective crossbar away from the small protective crossbar, and the other end of the screw is connected to the support plate. The rotating handle is fixed in the middle of the screw, and the support plate supports the wall.

[0012] Preferably, it also includes a base plate, which is a rectangular load-bearing structure. The base plate has evenly distributed bolt holes on its surface. The base plate is fastened to the ground base by expansion bolts passing through the bolt holes. The upper surface of the base plate is welded to the bottom of the protective vertical bar.

[0013] Preferably, a scale is provided on the side of the small protective crossbar; a first reinforcing plate is provided at the connection between the small protective crossbar and the ear plate, and a second reinforcing plate is provided at the connection between the protective vertical bar and the base plate.

[0014] Preferably, the screw is threaded with an auxiliary nut, and the screw and the support plate are connected by a bearing.

[0015] Compared with existing technologies, this invention offers the following advantages: The small and large protective horizontal bars are hollowly nested and slide together, allowing for flexible length adjustment and secure positioning via the first and second pin holes and the pin itself. The scale on the small protective horizontal bar ensures precise adjustment, improving installation efficiency. The grooved connection nodes of the protective vertical bars are fastened to U-shaped steel pipe fasteners, ensuring a stable connection to the horizontal bars, preventing wobbling, and facilitating disassembly and maintenance. The ear plates are fixed to the wall with expansion bolts, and the top support is adjusted by screws and a rotating handle to tighten the support plate against the wall, providing double fixation for enhanced stability. The first and second reinforcing plates strengthen the connection, preventing detachment. The rectangular base plate is fastened to the ground base with expansion bolts via bolt holes and welded to the bottom of the protective vertical bars, providing solid support, distributing stress, and enhancing anti-overturning properties. Overall, the design balances flexibility, stability, and practicality, offering convenient installation, reusability, and effectively improving protective safety and adaptability while reducing construction costs. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention; Figure 2 and Figure 3 This is a structural diagram of the small protective crossbar of the present invention; Figure 4 This is a structural diagram of the large protective crossbar of the present invention; Figure 5 This is a structural diagram of the connection between the large protective crossbar and the top support of the present invention; Figure 6 This is a diagram of the pin structure of the present invention; Figure 7 This is a structural diagram of the base plate of the present invention; Figure 8 This is a schematic diagram of the usage state of the present invention.

[0017] The attached diagram shows the following labels: 1. Small protective horizontal bar; 2. Large protective horizontal bar; 3. Protective vertical bar; 4. Ear plate; 5. Top support; 6. Pin; 7. Wall surface; 8. Base plate; 9. Ground base; 11. First pin hole; 12. Scale; 13. First reinforcing plate; 21. Second pin hole; 22. Threaded opening; 31. Connection node; 51. Screw; 52. Support plate; 53. Rotating handle; 54. Auxiliary nut; 55. Bearing; 61. Pin cap; 62. Lifting lug; 81. Bolt hole; 82. Second reinforcing plate. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0022] like Figure 1 and combined Figures 2 to 8 As shown, an automatically adjustable length top-supported edge protection frame includes small protective horizontal bars 1, large protective horizontal bars 2, protective vertical bars 3, ear plates 4, and a top support 5. The small protective horizontal bars 1 are connected to the large protective horizontal bars 2. Multiple small protective horizontal bars 1 are vertically connected to one protective vertical bar 3. Multiple large protective horizontal bars 2 are vertically connected to another protective vertical bar 3. The ear plate 4 is connected to the end of the small protective horizontal bar 1 away from the large protective horizontal bar 2. The top support 5 is connected to the end of the large protective horizontal bar 2 away from the small protective horizontal bar 1.

[0023] Furthermore, both the small protective crossbar 1 and the large protective crossbar 2 are hollow structures. The outer diameter of the small protective crossbar 1 is adapted to the inner diameter of the large protective crossbar 2, and the small protective crossbar 1 is slidably sleeved inside the large protective crossbar 2.

[0024] The further technical solution offers the following advantages: both the small protective crossbar 1 and the large protective crossbar 2 are designed as hollow structures, with the outer diameter of the small protective crossbar 1 matching and slidingly fitted with the inner diameter of the large protective crossbar 2, enabling flexible adjustment of the protective frame's length. Compared to a fixed-length structure, this allows for adjustment based on the actual width of the adjacent edge, eliminating the need for cutting or splicing crossbars, significantly improving the versatility of the protective frame and adapting to adjacent areas of different sizes. Simultaneously, the hollow structure reduces overall weight while maintaining structural strength, facilitating handling and installation.

[0025] Furthermore, the small protective crossbar 1 has several first pin holes 11 on its side wall, and the large protective crossbar 2 has a second pin hole 21 on its side wall. The first pin holes 11 and the second pin holes 21 are inserted through the pin 6. The upper end of the pin 6 is provided with a pin cap 61, and the pin cap 61 is provided with a lifting lug 62.

[0026] The following benefits are derived from the adoption of a further technical solution: By providing several first pin holes 11 on the side wall of the small protective crossbar 1 and second pin holes 21 on the side wall of the large protective crossbar 2, and cooperating with the through-fixing of the pin 6 and pin cap 61, the small protective crossbar 1 and the large protective crossbar 2 can be quickly locked and positioned after being adjusted to the appropriate length. The plug-and-play design of the pin 6 makes operation simple, and the pin cap 61 can prevent the pin 6 from falling off, ensuring the firmness of the crossbar connection after length adjustment, avoiding protection failure due to crossbar slippage during use of the protective frame, and improving protection safety.

[0027] Furthermore, the protective vertical rod 3 is provided with a plurality of connecting nodes 31 at intervals, and the connecting nodes 31 are in the shape of grooves.

[0028] The following benefits are derived from the adoption of a further technical solution: Grooved connecting nodes 31 are spaced apart on the protective vertical bars 3, and U-shaped steel pipe fasteners 32 are bolted to them, providing precise assembly and positioning points for the small protective horizontal bars 1 and the large protective horizontal bars 2. The grooved connecting nodes 31 restrict the lateral displacement of the horizontal bars, while the U-shaped steel pipe fasteners 32 tightly wrap around the horizontal bars for secure fastening. Compared to traditional welding or binding connections, this method is more convenient for assembly and disassembly, and offers higher connection strength, effectively improving the overall stability of the protective frame structure. It also facilitates later maintenance and component replacement.

[0029] Furthermore, both the small protective horizontal bar 1 and the large protective horizontal bar 2 are connected to the connection node 31 on the protective vertical bar 3 and fixed by steel pipe fasteners.

[0030] The following further technical solution offers advantages: Connecting both the small protective horizontal bar 1 and the large protective horizontal bar 2 to the connecting nodes 31 of the protective vertical bar 3 and securing them with steel pipe fasteners 32 achieves precise alignment and stable assembly of the horizontal and vertical bars. This connection method ensures that the vertical angle between the horizontal and vertical bars remains constant, preventing the protective frame from tilting or deforming due to loose connections. Furthermore, the standardized connection facilitates batch installation and debugging, improves construction efficiency, ensures uniform stress distribution across the entire protective frame, and enhances the reliability of edge protection.

[0031] Furthermore, the ear plate 4 is fixed to the wall 7 by expansion bolts.

[0032] The further technical solution offers the following benefits: The ear plate 4, fixed to the wall 7 with expansion bolts, firmly anchors one end of the protective frame to the wall 7, preventing displacement or tipping under stress. The expansion bolt fixing method is compatible with various wall materials, ensuring secure installation and minimizing damage to the wall 7 upon disassembly. Simultaneously, the connection design of the ear plate 4 ensures a tighter connection between the protective frame and the wall 7, eliminating gaps and enhancing the integrity and safety of edge protection.

[0033] Furthermore, the top support 5 includes a screw 51, a support plate 52, and a rotating handle 53. One end of the screw 51 is threadedly connected to the threaded end 22 of the large protective crossbar 2 away from the small protective crossbar 1, and the other end of the screw 51 is connected to the support plate 52. The rotating handle 53 is fixed in the middle of the screw 51, and the support plate 52 supports the wall surface 7.

[0034] The further technical solution offers the following benefits: The top support 5 consists of a screw 51, a support plate 52, and a rotating handle 53. The screw 51 is threadedly connected to the threaded end 22 of the large protective crossbar 2. By rotating the handle 53, the extension length of the screw 51 can be finely adjusted, ensuring that the support plate 52 tightly supports the wall surface 7. This design can compensate for minor errors after length adjustment, ensuring that both ends of the protective frame are tightly fixed. At the same time, the self-locking property of the threaded connection ensures stable support force. The support plate 52 increases the contact area with the wall surface 7, reducing localized stress and preventing damage to the wall surface 7, further improving the installation stability of the protective frame.

[0035] Furthermore, it also includes a base plate 8, which is a rectangular load-bearing structure. The surface of the base plate 8 has four evenly distributed bolt holes 81. The base plate 8 is fastened to the ground base 9 by expansion bolts passing through the bolt holes 81. The upper surface of the base plate 8 is welded to the bottom of the protective vertical rod 3.

[0036] The further technical solution offers several advantages: A rectangular load-bearing base plate 8 is added, which is secured to the ground base 9 via expansion bolts through bolt holes 81. The base plate 8 is welded to the bottom of the protective vertical rod 3, allowing the force of the protective vertical rod 3 to be evenly transferred to the ground base 9. Compared to the vertical rod directly touching the ground, the base plate 8 increases the contact area with the ground, preventing the vertical rod from sinking or shifting due to stress. Simultaneously, the four evenly distributed bolt holes 81 ensure a firm fixation, adapting to different ground conditions, improving the overall load-bearing capacity and anti-overturning properties of the protective frame, and ensuring safety.

[0037] Furthermore, a scale 12 is provided on the side of the small protective crossbar 1; a first reinforcing plate 13 is provided at the connection between the small protective crossbar 1 and the ear plate 4, and a second reinforcing plate 82 is provided at the connection between the protective vertical bar 3 and the base plate 8.

[0038] The further technical solution offers the following benefits: A scale 12 is installed on the side of the small protective crossbar 1, providing a precise reference for adjusting the lengths of the small and large protective crossbars 2, avoiding excessive length deviations caused by relying on experience during adjustment. Operators can quickly locate the required length using the scale 12, improving the accuracy and efficiency of length adjustment, ensuring a precise match between the protective frame and the edge width, reducing subsequent adjustment work, and guaranteeing dimensional uniformity across multiple protective units, thus improving construction standardization.

[0039] A first reinforcing plate 13 is installed at the connection between the small protective horizontal bar 1 and the ear plate 4, and a second reinforcing plate 82 is installed at the connection between the protective vertical bar 3 and the base plate 8. This can specifically enhance the structural strength of key stress-bearing parts. The above-mentioned connection points are the core nodes for force transmission of the protective frame. The reinforcing plates can disperse the concentrated stress at the connection points, avoid cracking and deformation under long-term use or impact, extend the service life of the protective frame, and further improve the overall stability of the protective frame, preventing protective accidents caused by node failure.

[0040] Furthermore, the screw 51 is threadedly connected to an auxiliary nut 54, and the screw 51 is connected to the support plate 52 via a bearing 55.

[0041] The benefits of adopting a further technical solution are: the auxiliary nut 54 can play a role in stabilization, and the bearing facilitates the rotation of the screw 51.

[0042] Compared with existing technologies, the present invention offers the following advantages: The small protective horizontal bar 1 and the large protective horizontal bar 2 are hollowly nested and slide together. With the first pin hole 11, the second pin hole 21, and the pin 6, the length can be flexibly adjusted and securely positioned. The scale 12 of the small protective horizontal bar 1 ensures precise adjustment, improving installation efficiency. The grooved connecting node 31 of the protective vertical bar 3 is bolted to the U-shaped steel pipe fastener 32, ensuring a stable connection of the horizontal bar, preventing wobbling, and facilitating disassembly and maintenance. The ear plate 4 is fixed to the wall surface 7 with expansion bolts. The top support 5 adjusts the support plate 52 against the wall surface 7 via screws 51 and rotating handles 53, providing double fixation and enhancing stability. The first reinforcing plate 13 is fixed to the base layer 9 with expansion bolts and welded to the bottom of the protective vertical bar 3, providing solid support, distributing stress, and enhancing anti-overturning properties. The overall design balances flexibility, stability, and practicality, is easy to install, reusable, effectively improving protective safety and adaptability, and reducing construction costs.

[0043] Working principle: First, fix the base plate 8. Secure the rectangular base plate 8 to the ground base 9 using expansion bolts through the bolt holes 81 on its surface, ensuring a flat and secure installation. Second, assemble the protective vertical bars 3. Weld the bottom of the protective vertical bars 3 to the upper surface of the base plate 8, ensuring the bars are vertical and without tilt. Third, connect the horizontal bar assembly. According to the required edge protection spacing, slide the small protective horizontal bar 1 into the hollow interior of the large protective horizontal bar 2. Precisely adjust the length according to the scale 12 on the side of the small protective horizontal bar 1, aligning the first pin hole 11 of the small protective horizontal bar 1 with the corresponding second pin hole 21 of the large protective horizontal bar 2. Insert the pin 6 and fix it using the pin cap 61. Fourth, connect the horizontal and vertical bars. Insert the adjusted small protective horizontal bar 1 and large protective horizontal bar 2 into the corresponding groove-shaped connecting nodes 31 of the two protective vertical bars 3, and tighten them with U-shaped steel pipe fasteners 32 bolts, completing the vertical fixation of the horizontal and vertical bars. Step 5: End fixing and reinforcement. Secure the ear plate 4 at the end of the small protective crossbar 1 furthest from the large protective crossbar 2 to the wall 7 using expansion bolts. Simultaneously, reinforce the connection between the small protective crossbar 1 and the ear plate 4 using the first reinforcing plate 13. Rotate the rotating handle 53 of the top support 5 to extend and retract the screw 51 along the threaded opening 22 at the end of the large protective crossbar 2, causing the support plate 52 to press against the other side of the wall 7. Reinforce the connection between the top support 5 and the screw 51 with the help of the second reinforcing plate 54. Step 6: Inspection and adjustment. Confirm that all components are securely connected, the top support 5 is evenly stressed, and the entire protective frame is stable without shaking. Installation is now complete.

[0044] Example 1: Edge protection of balconies in residential buildings This embodiment is applied to the edge protection of a 15-story balcony in a high-rise residential building. The edge width of the balcony is 2.8m, and the edge height is required to be no less than 1.2m. Both sides are concrete shear walls (wall 7), and the ground base 9 is a C30 concrete floor (120mm thick). It needs to meet the protection requirements for the passage of construction personnel and the temporary stacking of materials, while also adapting to slight deviations in the edge width of the balcony, so as to facilitate quick disassembly during the later construction of the balcony railing.

[0045] In this embodiment, the parameters of each component of the automatically adjustable length top-supported edge protection frame are as follows: Small protective crossbar 1: It is made of Φ48×3.5mm hollow welded steel pipe, with a length of 1.5m. A Φ12mm first pin hole 11 is opened every 100mm along the length of the side wall. A stainless steel scale 12 (range 0-1500mm, graduation value 1mm) is attached to the side. A 10mm thick first reinforcing plate 13 (dimension 80×80mm) is welded at the connection with the ear plate 4. Large protective crossbar 2: It is made of Φ57×3.5mm hollow welded steel pipe with a length of 1.8m. A second pin hole 21 with a diameter of Φ12mm is opened at the corresponding position on the side wall. A threaded port 22 with internal thread (thread specification M16) is welded to the end away from the small protective crossbar 1. Protective vertical rod 3: Made of Φ48×3.5mm welded steel pipe, 1.2m high, with a groove-shaped connection node 31 (groove depth 10mm, width 50mm) set at 300mm intervals on the side wall. Ear plate 4: Made of 8mm thick steel plate by stamping (size 100×80mm), with 2 Φ14mm bolt holes on the surface; Top support 5: The screw 51 is made of M16×300mm high-strength screw, the support plate 52 is made of 8mm thick rectangular steel plate (dimensions 100×100mm), the rotating handle 53 is made of Φ16mm round steel bent into shape (length 150mm), a 6203 deep groove ball bearing 55 is installed between the screw 51 and the support plate 52, and an M16 auxiliary nut 54 is threaded on the screw 51; Pin 6: Made of Φ12×100mm round steel, pin cap 61 with a diameter of 20mm, and lifting lug 62 made of Φ6mm round steel bent into shape; Base plate 8: Made of 10mm thick rectangular steel plate (size 200×150mm), with 4 evenly distributed Φ14mm bolt holes 81 (hole spacing 80mm) on the surface, and a 10mm thick second reinforcing plate 82 (size 80×80mm) is installed at the weld point between the upper surface and the bottom of the protective vertical bar 3. Auxiliary components: U-shaped steel pipe fasteners (compatible with Φ48 steel pipes) are used, and M12×80mm metal expansion bolts (for wall fixing) and M12×100mm metal expansion bolts (for ground fixing) are used.

[0046] The installation and usage process of this embodiment is as follows: Ground fixing: Clean the base layer 9 of the balcony edge to ensure that the surface is flat and free of debris. Place the two base plates 8 on both sides of the balcony edge (50mm away from the wall 7). Use M12×100mm expansion bolts to pass through the bolt holes 81 and fasten them to the concrete floor. Control the torque at 40N·m to ensure that the base plates 8 are installed firmly and without loosening. Vertical rod assembly: Weld the two protective vertical rods 3 to the upper surfaces of the two base plates 8 respectively. The welding should be full welding (weld height 6mm). After welding, clean the welding slag and check the verticality of the protective vertical rods 3 (deviation not greater than 3mm / m) to ensure that there is no tilting. Adjusting and fixing the crossbar: Slide the small protective crossbar 1 into the large protective crossbar 2. According to the scale 12 on the side of the small protective crossbar 1, adjust the nesting length of the two so that the total length of the crossbar reaches 2.8m (the small protective crossbar 1 extends 1.0m beyond the end of the large protective crossbar 2). Align the first pin hole 11 and the second pin hole 21 at this time, insert the pin 6, and ensure that the pin 6 passes through the two holes. The pin cap 61 fits against the surface of the large protective crossbar 2 to complete the fixing of the crossbar length. Horizontal and vertical bar connection: Insert the two ends of the adjusted horizontal bar assembly (small protective horizontal bar 1 + large protective horizontal bar 2) into the groove-shaped connection nodes 31 of the two protective vertical bars 3 respectively (select the bottom and middle connection nodes 31 to form double protection), and tighten them with U-shaped steel pipe fastener bolts. The bolt torque is controlled at 35 N·m to ensure that the horizontal bar and vertical bar are vertically connected and without shaking. End fixing: Attach the ear plate 4 at the end of the small protective crossbar 1 to the concrete shear wall (wall 7) on one side of the balcony, and fasten it with two M12×80mm expansion bolts, controlling the torque at 40 N·m. Check the fit between the first reinforcing plate 13 and the ear plate 4 and the small protective crossbar 1 to ensure there are no gaps. Rotate the rotating handle 53 of the top support 5 so that the screw 51 extends along the threaded opening 22 of the large protective crossbar 2, driving the support plate 52 to fit against the concrete shear wall on the other side of the balcony. Continue to rotate the rotating handle 53 until the support plate 52 is pressed against the wall 7 (the top support force is controlled at 5 kN). Tighten the auxiliary nut 54 to lock the position of the screw 51, completing the double fixing at both ends of the protective frame. Inspection and debugging: Check the connection of each component to ensure that the pin 6 is installed in place, the steel pipe fasteners are fastened, the top support 5 is firmly supported, and the entire protective frame is stable; measure the protection height to ensure that the double-layer crossbars are located at 0.6m and 1.2m height respectively, which meets the edge protection requirements; Use and dismantling: During construction, the protective frame is used for the protection of construction personnel and the temporary storage of small materials (the weight of the stacked materials shall not exceed 2kN / m). Regularly check the tightness of the pins 6, steel pipe fasteners, and expansion bolts, and deal with any looseness in time. When the balcony railing is being constructed, first remove the auxiliary nut 54 of the top support 5, rotate the handle 53 in the opposite direction to make the support plate 52 detach from the wall 7, pull out the pins 6, retract the small protective horizontal bar 1 into the large protective horizontal bar 2, loosen the steel pipe fasteners, dismantle the horizontal bar assembly, and then remove the protective vertical bar 3 and the base plate 8 (if reuse is required, the weld can be cut and the parts cleaned). After dismantling, the parts are cleaned and stored properly for subsequent floor protection.

[0047] The beneficial effects of this embodiment are: adapting to the 2.8m width requirement of residential balconies, the length can be quickly adapted through the nested sliding of the horizontal bar and precise adjustment with a scale, without the need to cut steel pipes; double-layer horizontal bar protection and double end fixing (ear plate + top support), combined with reinforcing plates to strengthen key nodes, ensure stable protection and eliminate "formal protection"; easy to assemble and disassemble, components can be reused, reducing deformation and loss of steel pipe fasteners, reducing construction costs, and meeting the safety protection requirements for construction at the edge of high-rise residential buildings.

[0048] Example 2: Edge Protection of Basement Excavation Pit This embodiment is applied to the edge protection of a basement foundation pit. The foundation pit is rectangular, with one edge being 4.5m long and 1.5m high. One side of the edge is the pit sidewall (wall 7 is a brick retaining wall with a thickness of 240mm), and the other side is the edge of the construction passage. The ground base 9 is rammed soil (compaction coefficient ≥0.95). It needs to meet the requirements of protection for construction personnel in the foundation pit, prevention of falling debris, and adaptability to fluctuations in the length of the foundation pit edge. It should also be able to cope with slight settlement of the soil surface to ensure the stability of the protection.

[0049] In this embodiment, the parameters of each component of the automatically adjustable length top-supported edge protection frame are as follows (parameters that differ from those in Embodiment 1 are highlighted, while those that are the same are not repeated): Small protective crossbar 1: Made of Φ48×3.5mm hollow welded steel pipe, 2.0m in length, with a Φ12mm first pin hole 11 opened every 150mm along the length of the side wall, and a stainless steel scale 12 (range 0-2000mm, graduation value 1mm) attached to the side. Large protective crossbar 2: It adopts a Φ57×3.5mm hollow welded steel pipe with a length of 2.8m, and a second pin hole 21 with a Φ12mm diameter is opened at the corresponding position on the side wall; Protective vertical rod 3: Made of Φ48×3.5mm welded steel pipe, 1.5m high, with a groove-shaped connection node 31 set at 300mm intervals on the side wall; Top support 5: Screw 51 adopts M16×400mm high-strength screw, which is suitable for adjusting the flatness deviation of brick retaining wall; Base plate 8: Made of 12mm thick rectangular steel plate (250×200mm), with 4 evenly distributed Φ14mm bolt holes 81 on the surface, and 4 Φ16×100mm anchor bars welded to the bottom (inserted into the plain soil to a depth of 80mm) to enhance the connection stability with the plain soil surface. Auxiliary components: M12×120mm metal expansion bolts are used for fixing the brick retaining wall. When fixing to the ground, the expansion bolts penetrate the bottom plate 8 and are used in conjunction with the pre-embedded steel plate (size 250×200mm) to enhance the load-bearing performance of the soil surface.

[0050] The installation and usage process of this embodiment is as follows: Ground treatment and base plate fixing: The subgrade 9 of the soil surface at the edge of the foundation pit is compacted to ensure that the compaction coefficient is ≥0.95. Excavate foundation pits with a depth of 80mm and dimensions matching the base plate 8 on both sides of the edge. Place the pre-embedded steel plate at the bottom of the foundation pit and lay a 50mm thick C15 concrete cushion layer. After the cushion layer has initially set, place the base plate 8 on the pre-embedded steel plate. The anchor bars at the bottom of the base plate 8 are inserted into the soil. M12×100mm expansion bolts are passed through the bolt holes 81 and the pre-embedded steel plate to firmly connect with the soil surface. Pour C15 concrete to wrap the bottom of the base plate 8. After the concrete reaches 70% of the design strength, proceed with the subsequent construction. Vertical rod assembly: Weld the two protective vertical rods 3 to the upper surfaces of the two base plates 8 respectively. Welding is full welding. Check the verticality of the protective vertical rods 3. The deviation should not be greater than 3mm / m. After welding, perform anti-corrosion treatment (apply two coats of anti-rust paint + one coat of topcoat). Adjustment and fixing of the crossbar: Slide the small protective crossbar 1 into the large protective crossbar 2, and adjust the nesting length according to the scale 12 so that the total length of the crossbar reaches 4.5m (the small protective crossbar 1 extends 1.7m beyond the end of the large protective crossbar 2). Align the first pin hole 11 and the second pin hole 21, and insert the pin 6 to complete the length fixing. At the same time, add an intermediate protective vertical bar (welded and fixed to the base plate 8) between the two protective vertical bars 3, dividing the crossbar assembly into two sections (each section is about 2.25m long) to enhance the stability of the crossbar and avoid bending deformation caused by excessive length. Horizontal and vertical bar connection: The horizontal bar assembly is snapped into the groove-shaped connection node 31 of the three protective vertical bars 3, and three layers of horizontal bars (0.3m, 0.9m, 1.5m in height) are set up and fastened with U-shaped steel pipe fastener bolts to ensure a firm connection and that the horizontal bars and vertical bars are perpendicular and do not wobble; End fixing: Attach the ear plate 4 at the end of the small protective crossbar 1 to the brick retaining wall (wall surface 7) and tighten it with M12×120mm expansion bolts, ensuring that the expansion bolts penetrate the wall by at least 80mm to prevent loosening; rotate the rotating handle 53 of the top support 5 to adjust the extension length of the screw 51, so that the support plate 52 is attached to the temporary fence (or wall surface) at the edge of the construction passage on the other side, tighten it, and then tighten the auxiliary nut 54 to complete the double fixing; to address the problem of uneven brick retaining wall surface, the rotation of the bearing 55 makes the support plate 52 fit tightly against the wall surface 7, ensuring uniform top support force; Protection, reinforcement, and inspection: Hang a dense safety net (mesh density ≥ 2000 meshes / 100cm) on the outside of the protective frame. 2 The safety net is securely connected to the horizontal and vertical bars of the protective structure to prevent debris from falling. The settlement of the base plate 8, the installation status of the pins 6, the tightness of the steel pipe fasteners, and the supporting force of the top support 5 are checked regularly. If settlement is found, the length of the screw 51 of the top support 5 is adjusted in time. If loosening is found, it is dealt with in time to ensure that the protective frame is always in a stable state. Dismantling and Recycling: After the foundation pit construction is completed, first remove the dense safety net, then dismantle the top support 5 and the pin 6, retract the small protective horizontal bar 1 into the large protective horizontal bar 2, loosen the steel pipe fasteners, remove the horizontal bar assembly and the protective vertical bar 3, cut the connection between the bottom plate 8 and the embedded steel plate, clean the mud and rust from the surface of each component, perform maintenance (after grinding the rusted parts, repaint with anti-rust paint), and store properly for use in other foundation pits or edge protection scenarios.

[0051] The beneficial effects of this embodiment are as follows: It adapts to the protection requirements of a 4.5m long edge of a basement pit. By adding a middle vertical bar and segmenting the horizontal bars, the problem of easy bending of long horizontal bars is solved. The anchor bars and embedded steel plates of the bottom plate 8 enhance the connection stability of the subgrade 9 and cope with slight settlement. The adjustable bearings of the top support 5 are adapted to the uneven surface of the brick retaining wall and ensure the top support is firm. The combination of three layers of horizontal bars and dense safety net improves the protection level and eliminates the risk of falling debris and personnel. The components are reusable, reducing material consumption and management costs, and adapting to the complex construction environment of the pit edge.

[0052] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A top-supported edge protection frame with automatically adjustable length, characterized in that: It includes a small protective horizontal bar (1), a large protective horizontal bar (2), a protective vertical bar (3), an ear plate (4), and a top support (5). The small protective horizontal bar (1) is connected to the large protective horizontal bar (2). Multiple small protective horizontal bars (1) are vertically connected to a protective vertical bar (3). Multiple large protective horizontal bars (2) are vertically connected to another protective vertical bar (3). An ear plate (4) is connected to the end of the small protective horizontal bar (1) away from the large protective horizontal bar (2). A top support (5) is connected to the end of the large protective horizontal bar (2) away from the small protective horizontal bar (1).

2. The automatically adjustable length top-supported edge protection frame as described in claim 1, characterized in that: Both the small protective crossbar (1) and the large protective crossbar (2) are hollow structures. The outer diameter of the small protective crossbar (1) is matched with the inner diameter of the large protective crossbar (2). The small protective crossbar (1) is slidably sleeved inside the large protective crossbar (2).

3. The top-supported edge protection frame with automatically adjustable length as described in claim 2, characterized in that: The small protective crossbar (1) has several first pin holes (11) on its side wall, and the large protective crossbar (2) has a second pin hole (21) on its side wall. The first pin holes (11) and the second pin holes (21) are inserted through the pin (6). The upper end of the pin (6) is provided with a pin cap (61), and the pin cap (61) is provided with a lifting lug (62).

4. The automatically adjustable length top-supported edge protection frame as described in claim 1, characterized in that: The protective vertical rod (3) is provided with multiple connecting nodes (31) at intervals, and the connecting nodes (31) are in the shape of grooves.

5. The automatically adjustable length top-supported edge protection frame as described in claim 4, characterized in that: The small protective horizontal bar (1) and the large protective horizontal bar (2) are both connected to the connection node (31) on the protective vertical bar (3) and fixed by steel pipe fasteners.

6. The automatically adjustable length top-supported edge protection frame as described in claim 1, characterized in that: The ear plate (4) is fixed to the wall (7) by expansion bolts.

7. The automatically adjustable length top-supported edge protection frame as described in claim 1, characterized in that: The top support (5) includes a screw (51), a support plate (52) and a rotating handle (53). One end of the screw (51) is threaded to the threaded end (22) of the large protective crossbar (2) away from the small protective crossbar (1). The other end of the screw (51) is connected to the support plate (52). The rotating handle (53) is fixed in the middle of the screw (51). The support plate (52) supports the wall (7).

8. The automatically adjustable length top-supported edge protection frame as described in claim 1, characterized in that: It also includes a base plate (8), which is a rectangular load-bearing structure. The base plate (8) has four evenly distributed bolt holes (81) on its surface. The base plate (8) is fastened to the ground base (9) by expansion bolts passing through the bolt holes (81). The upper surface of the base plate (8) is welded to the bottom of the protective vertical rod (3).

9. The automatically adjustable length top-supported edge protection frame as described in claim 1, characterized in that: A scale (12) is provided on the side of the small protective crossbar (1); a first reinforcing plate (13) is provided at the connection between the small protective crossbar (1) and the ear plate (4); and a second reinforcing plate (82) is provided at the connection between the protective vertical bar (3) and the bottom plate (8).

10. The automatically adjustable length top-supported edge protection frame as described in claim 7, characterized in that: The screw (51) is threaded with an auxiliary nut (54), and the screw (51) is connected to the support plate (52) via a bearing (55).

Images