Installation method of a rotating overhanging horizontal safety net system

Abstract

The application discloses a kind of installation methods of rotating cantilever horizontal safety net system, also includes cantilever rod, upper floor, lower floor, I-beam and steel beam connecting piece;Cantilever rod one end is arranged on fixed assembly, the other end is cantilevered to outside, and safety net is arranged between the cantilevered end of cantilever rod and upper floor;Fixed assembly includes bottom plate, U-shaped rotating plate and the position limiting device for fixing U-shaped rotating plate;Bottom plate is rectangular plate, and is fixedly set on the upper end face edge of lower floor;U-shaped rotating plate is set on the upper end face of bottom plate, and the bottom center of U-shaped rotating plate is connected with bottom plate by first bolt, and U-shaped rotating plate can rotate with first bolt as pivot;Two side walls of U-shaped rotating plate are connected by second bolt and cantilever rod end, and cantilever rod can rotate with second bolt as pivot.The application wants to solve the technical problems such as long construction period, high risk coefficient and small application range of cantilever safety net.

Description

Technical Field

[0001] This invention relates to the field of cantilevered horizontal safety net technology, and in particular to an installation method for a rotating cantilevered horizontal safety net system. Background Technology

[0002] Horizontal safety nets, used for fall protection on construction sites, are widely applied in the construction of multi-story and high-rise buildings and are one of the most important facilities on construction sites. During the main construction of a building, a 6m wide double-layer horizontal safety net should be erected around the perimeter of the first floor of a high-rise building, and a 3m wide horizontal safety net should be installed every four floors and no more than 10m apart.

[0003] Traditional horizontal safety nets typically employ cantilevered scaffolding, with the safety net tied to cantilevered steel pipes. However, this method has the following drawbacks during construction:

[0004] First, the construction period is long. Horizontal safety nets require scaffolding to be erected before installation, and can only be used after the scaffolding is completed and inspected and approved by the supervision unit. If the building is large, the construction time is long, which negatively impacts the project schedule.

[0005] Secondly, the risk factor is high. When tying horizontal safety nets, operators need to wear safety belts and safety ropes and carry out tying work on the cantilevered steel pipes. There is a possibility of falling accidents, which poses certain safety hazards.

[0006] Third, its application scope is limited. Traditional horizontal safety nets are mostly used in cast-in-place reinforced concrete structures. For steel structures, since cantilevered structures are mostly I-beams, they are not easy to erect at the edge, which increases the difficulty of construction.

[0007] In summary, there is currently no cantilevered horizontal safety net that has a low risk factor, is easy to construct, and has a wide range of applications. Summary of the Invention

[0008] This invention provides an installation method for a rotating cantilevered horizontal safety net system, which solves the technical problems of long construction period, high risk factor and small application range of cantilevered horizontal safety nets.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: an installation method for a rotating cantilevered horizontal safety net system, wherein the rotating cantilevered horizontal safety net system includes a horizontal safety net, a cantilever rod, an upper floor slab, a lower floor slab, an H-shaped steel beam set at the lower edge of the upper floor slab, a fixing component set at the lower floor slab, a steel beam connecting component set on the H-shaped steel beam, and a steel wire rope for pulling up the cantilever rod; one end of the cantilever rod is fixedly set on the fixing component, and the other end cantilevers outward, with the cantilever end of the cantilever rod higher than the upper floor slab. A horizontal safety net is installed between the cantilever end of the cantilever pole and the upper floor slab. A first ear plate is fixedly installed on the upper end face of the middle part of the cantilever pole. The fixing assembly includes a fixing plate, a U-shaped rotating plate, and a limiting device for fixing the position of the U-shaped rotating plate. The fixing plate is a rectangular plate and is fixedly installed on the upper edge of the lower floor slab. The U-shaped rotating plate is installed on the upper end face of the fixing plate. The center of the bottom plate of the U-shaped rotating plate is connected to the fixing plate by a first bolt. The bolt head of the first bolt is located on the lower end face of the fixing plate, and the bolt body of the first bolt passes through the fixing plate and the bottom plate of the U-shaped rotating plate and extends upward. The U-shaped rotating plate can rotate around the first bolt as its axis; the two side walls of the U-shaped rotating plate are connected by a second bolt and a cantilever rod, which can rotate around the second bolt as its axis; a limiting device is set on the upper surface of the fixed plate, including a vertical baffle and an L-shaped buckle plate, the top of the vertical part of the L-shaped buckle plate is movably connected to the top of the vertical baffle plate by a hinge; the bottom end of the vertical baffle plate is fixedly set at the corner of the fixed plate away from the edge of the lower floor slab, and the vertical baffle plate is perpendicular to the side wall of the U-shaped rotating plate; the steel beam connecting assembly includes a U-shaped clamp, a J-shaped screw, and a fixing pipe; the two side walls of the U-shaped clamp are respectively The upper and lower ends of the lower flange plate on the outer side of the web of the H-beam are clamped together; the fixing tube is set on the lower end of the lower side wall of the U-shaped clamp, and the lower end of the fixing tube is fixedly provided with a second ear plate; the short rod of the J-shaped screw is set on the upper end of the lower flange plate on the inner side of the web of the H-beam, and the long rod of the J-shaped screw is set on the lower end of the lower flange plate on the inner side of the web of the H-beam. The long rod of the J-shaped screw is threaded to the fixing tube and fastened by a fastening nut; one end of the wire rope is fixed on the first ear plate, and the other end passes through the second ear plate and is set on the U-shaped rotating plate.

[0010] The present invention also provides an installation method for the rotating cantilevered horizontal safety net system as described above, comprising the following steps:

[0011] S1, Measurement and layout: Mark out the center point of the fixed plate and the position of the steel beam connection components every 6-8m along the edge of the lower floor slab;

[0012] S2, Install the limiting device: Fix the limiting device to the fixing plate;

[0013] S3, Install the fixing plate and U-shaped rotating plate: Take one first bolt, pass the first bolt through the center of the lower end face of the fixing plate upward and fix it. Then take four expansion bolts and fix the four corners of the fixing plate to the lower floor slab respectively. Make the first bolt pass through the bottom plate of the U-shaped rotating plate and fix it with a nut. Confirm that the U-shaped rotating plate can rotate around the first bolt as the axis.

[0014] S4, Install steel beam connection components: Assemble the steel beam connection components on the ground. After the steel beam connection components are assembled, the workers use a gantry frame or folding ladder to clamp the U-shaped clamps onto the H-shaped steel beams. Then, insert the J-shaped screws into the fixing pipes and tighten them with fastening nuts. Confirm that the steel beam connection components are firmly fixed on the H-shaped steel beams without shaking. The installation of the steel beam connection components is then complete.

[0015] S5, Install cantilever poles and horizontal safety nets: Rotate the U-shaped rotating plate until its side wall is parallel to the edge of the lower floor slab. Use the second bolt to pass through the side wall of the U-shaped rotating plate and the cantilever pole to fix the cantilever pole to the U-shaped rotating plate. Fix the wire rope to the first ear plate inside the building. After the other end of the wire rope passes through the second ear plate, fix it to the U-shaped rotating plate. Then install the horizontal safety net at the cantilever end of the cantilever pole.

[0016] S6, Extend the cantilever pole and tie the horizontal safety net: Rotate the U-shaped rotating plate 90° to extend the cantilever pole outside the building. At this time, the U-shaped rotating plate should be against the vertical baffle of the limiting device. Then, move the L-shaped buckle plate to make it engage with the U-shaped rotating plate and secure it firmly. After the cantilever pole is extended from the lower floor slab, pull the steel wire rope to rotate the cantilever pole vertically to the upper floor slab. Once the pole is extended to the upper floor slab, complete the tying of the horizontal safety net.

[0017] S7, Install the safety bolt: Install the safety bolt in the safety hole of the U-shaped rotating plate, and place the cantilever rod against the safety bolt;

[0018] S8, Deploy the horizontal safety net: The horizontal safety net is deployed by remotely controlling the electric drive device, thus completing the installation of the entire system.

[0019] Preferably, the bottom plate of the U-shaped rotating plate is provided with a third ear plate for passing through and fixing the wire rope.

[0020] Preferably, the side wall of the U-shaped rotating plate is provided with a hand crank for pulling and fixing the wire rope.

[0021] Preferably, a fourth ear plate is fixedly provided at the cantilever end of the cantilever pole for fixing the horizontal safety net.

[0022] Preferably, the cantilever end of the cantilever pole is fixedly equipped with a remote-controlled electric drive device for deploying the horizontal safety net.

[0023] Preferably, the side wall of the U-shaped rotating plate and the right side of the second bolt are provided with multiple safety holes at intervals, and safety bolts are installed in the safety holes.

[0024] Preferably, the height of the vertical part of the L-shaped buckle is not less than the distance between the two side walls of the U-shaped rotating plate, and the length of the horizontal part of the L-shaped buckle is not greater than the height of the side wall of the U-shaped rotating plate.

[0025] Preferably, the first bolt is located directly below the second bolt; the height of the first bolt extending out of the U-shaped rotating plate is not less than half the side length of the cross-section of the cantilever rod.

[0026] Preferably, the cantilever rod and fixing pipe are made of square steel pipe, while the U-shaped rotating plate, fixing plate, U-shaped clamp, vertical baffle and L-shaped buckle plate are all made of steel plate.

[0027] Preferably, the fixing pipe, U-shaped clamp, vertical baffle, and fixing plate are all welded and fixed.

[0028] The beneficial effects of this invention are reflected in:

[0029] 1) The present invention provides an installation method for a rotating cantilevered horizontal safety net system, which provides an application scenario in which workers can carry out the work entirely inside the building. After the fixed components are installed, the U-shaped rotating plate is rotated 90° counterclockwise until it is parallel to the edge of the building, and the workers can complete the net hanging work only inside the building. Then, by rotating the U-shaped rotating steel plate 90° clockwise, the cantilever rod can be lifted out of the building. After being lifted out of the floor, the steel wire rope on the cantilever rod can be pulled to rotate the cantilever rod to the upper floor and lift it to the upper floor position, and then the horizontal safety net can be tied.

[0030] 2) The installation method of the rotating cantilever horizontal safety net system provided by this invention adopts different types and directions of limiting measures: First, a limiting device is set on the base plate, which consists of a vertical baffle and an L-shaped buckle connected by a hinge. After the U-shaped rotating plate rotates 90° clockwise, the L-shaped buckle is rotated counterclockwise around the hinge to fix the U-shaped rotating plate in place, preventing swaying and improving overall stability. Second, the first bolt, through a fixed height, limits the angle between the cantilever rod and the ground to a maximum of 60°, preventing the steel wire rope from being pulled too much, resulting in an excessive angle and unstable force. Third, after the cantilever rod is raised to the upper floor slab, a safety bolt is installed in the safety hole of the U-shaped rotating plate to lock the cantilever rod at a specified angle. If a falling object from a height hits the safety net and causes the steel wire rope to break, the safety bolt can act as a safety device to prevent the cantilever rod from tilting directly, increasing the safety factor.

[0031] 3) The present invention provides an installation method for a rotating cantilevered horizontal safety net system, which is connected to an H-shaped steel beam through a steel beam connecting assembly. The steel beam connecting assembly consists of a U-shaped clamp, a J-shaped screw, and a fixing pipe. After the steel beam connecting assembly is installed, workers tighten it by turning the fastening nuts inside the building to ensure that the steel beam connecting assembly does not fall off. When the horizontal safety net is removed, the steel beam connecting assembly can be removed without affecting the steel structure, which has strong turnover and economy.

[0032] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objects and other advantages of the invention may be realized and obtained by means of the embodiments particularly pointed out in the description. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 This is a top view of the fixing component and cantilever rod of the present invention.

[0035] Figure 3 This is a front view of the U-shaped rotating plate and the fixed plate of the present invention.

[0036] Figure 4 This is a side view of the cantilever rod in its initial state according to the present invention.

[0037] Figure 5 This is a side view of the cantilever rod in the raised state of the present invention.

[0038] Figure 6 This is a schematic diagram illustrating the working principle of the limiting device of the present invention.

[0039] Figure 7 This is a schematic diagram of the rotation of the U-shaped rotating plate of the present invention.

[0040] Figure 8 This is a schematic diagram of the fixed component structure of the present invention.

[0041] Reference numerals: 1-Horizontal safety net, 2-Cantilever rod, 3-Upper floor slab, 4-Lower floor slab, 5-H-shaped steel beam, 6-Fixing component, 7-Steel beam connecting component, 8-Steel wire rope, 21-First ear plate, 22-Remote control electric drive device, 23-Fourth ear plate, 61-Base plate, 62-U-shaped rotating plate, 63-Limiting device, 64-First bolt, 65-Second bolt, 66-Safety hole, 67-Third ear plate, 68-Hand crank, 71-U-shaped clamp, 72-J-shaped screw, 73-Fixing pipe, 74-Fastening nut, 75-Second ear plate, 631-Vertical baffle, 632-L-shaped buckle plate, 633-Hinge. Detailed Implementation

[0042] The technical solutions of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and should not be construed as limiting the technical solutions of the present invention.

[0043] This embodiment takes a building construction project as an example. By designing and using an installation method for a rotating cantilevered horizontal safety net system, scaffolding can be eliminated during on-site construction. All workers can operate inside the building, avoiding the need to climb to heights to hang the net. This significantly improves the safety factor during construction, reduces construction difficulty, and features that it is detachable, reusable, flexible in application, and easy to operate.

[0044] Reference Figure 1-5 In this embodiment, the present invention provides an installation method for a rotating cantilever horizontal safety net system. The rotating cantilever horizontal safety net system includes a horizontal safety net 1, a cantilever pole 2, an upper floor slab 3, a lower floor slab 4, an H-shaped steel beam 5 set at the lower edge of the upper floor slab 3, a fixing component 6 set at the lower floor slab 4, a steel beam connecting component 7 set on the H-shaped steel beam 5, and a steel wire rope 8 for pulling up the cantilever pole 2.

[0045] The cantilever pole 2 is made of square steel tube, with one end fixedly mounted on the fixing component 6 and the other end cantilevered outward. The cantilever end of the cantilever pole 2 is higher than the upper floor slab 3. A horizontal safety net 1 is installed between the cantilever end of the cantilever pole 2 and the upper floor slab 3. A fourth ear plate 23 is fixedly installed at the cantilever end of the cantilever pole 2 for fixing the horizontal safety net 1. A remote-controlled electric drive device 22 for unfolding the horizontal safety net 1 is also fixedly installed at the cantilever end of the cantilever pole 2. A first ear plate 21 is fixedly installed on the upper surface of the middle part of the cantilever pole 2.

[0046] The fixing component 6 includes a fixing plate, a U-shaped rotating plate 62, and a limiting device 63 for fixing the position of the U-shaped rotating plate 62. Both the U-shaped rotating plate 62 and the fixing plate are made of steel plates. The fixing plate is a rectangular plate, fixedly installed on the upper edge of the lower floor slab 4. The U-shaped rotating plate 62 is installed on the upper surface of the fixing plate. The center of the bottom plate 61 of the U-shaped rotating plate 62 is connected to the fixing plate by a first bolt 64. The first bolt 64 can be an M14 expansion bolt. The bolt head of the first bolt 64 is located on the lower surface of the fixing plate, and the bolt body of the first bolt 64 passes through the fixing plate and the bottom plate 61 of the U-shaped rotating plate 62 and extends upwards. The height of the first bolt 64 extending out of the U-shaped rotating plate 62 is not less than half the side length of the cross-section of the cantilever rod 2. The length of the first bolt 64 extending out of the fixing plate should be 20mm to limit the angle between the cantilever rod 2 and the ground to a maximum of 60°. The U-shaped rotating plate 62 can rotate around the first bolt 64 as an axis. The two side walls of the U-shaped rotating plate 62 are connected to the cantilever rod 2 by the second bolt 65. The second bolt 65 is a φ14 bolt. The cantilever rod 2 can rotate around the second bolt 65 as the axis. The second bolt 65 is located directly above the first bolt 64. Multiple safety holes 66 are also provided at intervals on the side wall of the U-shaped rotating plate 62 and the right side of the second bolt 65. Safety bolts are provided on the safety holes 66. One end of the wire rope 8 is fixed on the first ear plate 21, and the other end passes through the second ear plate 75 and is set on the U-shaped rotating plate 62. The bottom plate 61 of the U-shaped rotating plate 62 is provided with a third ear plate 67 for passing through and fixing the wire rope 8. A hand crank 68 is provided on the side wall of the U-shaped rotating plate 62 for pulling and fixing the wire rope 8. The wire rope 8 can be fixed on the third ear plate 67 or the hand crank 68.

[0047] Reference Figure 6 In this embodiment, the limiting device 63 is set on the upper surface of the fixed plate, including a vertical baffle 631 and an L-shaped buckle 632. Both the vertical baffle 631 and the L-shaped buckle 632 are made of steel plate. The top of the vertical part of the L-shaped buckle 632 is movably connected to the top of the vertical baffle 631 by a hinge 633. The height of the vertical part of the L-shaped buckle 632 is not less than the distance between the two side walls of the U-shaped rotating plate 62, and the length of the horizontal part of the L-shaped buckle 632 is not greater than the height of the side wall of the U-shaped rotating plate 62. The bottom end of the vertical baffle 631 is welded and fixed to the corner of the fixed plate away from the edge of the lower floor slab 4, and the vertical baffle 631 is perpendicular to the side wall of the U-shaped rotating plate 62.

[0048] Reference Figure 8In this embodiment, the steel beam connecting assembly 7 includes a U-shaped clamp 71, a J-shaped screw 72, and a fixing pipe 73. The U-shaped clamp 71 is made of a 5mm thick and 100mm wide steel plate, and the fixing pipe 73 is made of a square steel pipe. The two side walls of the U-shaped clamp 71 are respectively clamped to the upper and lower end faces of the lower flange plate on the outer side of the web of the H-shaped steel beam 5. The fixing pipe 73 is welded and fixed to the lower end face of the lower side wall of the U-shaped clamp 71, and a second ear plate 75 is fixedly provided on the lower end face of the fixing pipe 73. The J-shaped screw 72 is a screw with a long rod of 600mm and a diameter of φ14. The short rod of the J-shaped screw 72 is set on the upper end face of the lower flange plate on the inner side of the web of the H-shaped steel beam 5, and the long rod of the J-shaped screw 72 is set on the lower end face of the lower flange plate on the inner side of the web of the H-shaped steel beam 5. The long rod of the J-shaped screw 72 is threadedly connected to the fixing pipe 73 and fastened by a fastening nut 74.

[0049] In this embodiment, the present invention also provides an installation method for the above-mentioned rotating cantilevered horizontal safety net system, the specific steps of which are as follows:

[0050] S1, Measurement and layout: Mark out the center point of the fixed plate and the position of the steel beam connection component 7 every 6-8m along the edge of the lower floor slab 4;

[0051] S2, Install the limiting device 63: Weld and fix the limiting device 63 to the fixing plate;

[0052] S3, Install the fixing plate and U-shaped rotating plate 62: Take one first bolt 64, which is an M14 expansion bolt. Insert the first bolt 64 from the center of the lower end face of the fixing plate upwards and fix it. The length of the first bolt 64 extending out of the fixing plate should be 20mm so as to limit the angle between the cantilever rod 2 and the ground to a maximum of 60°. Then take four M16 expansion bolts and fix the four corners of the fixing plate to the lower floor slab 4 respectively. Let the first bolt 64 pass through the bottom plate 61 of the U-shaped rotating plate 62 and fix it with a nut. Confirm that the U-shaped rotating plate 62 can rotate around the first bolt 64 as the axis.

[0053] S4, Install steel beam connecting component 7: Assemble steel beam connecting component 7 on the ground. After the steel beam connecting component 7 is assembled, the worker uses a gantry frame or folding ladder to clamp the U-shaped clamp 71 onto the H-shaped steel beam 5. Then, insert the J-shaped screw 72 into the fixing pipe 73 and tighten it with the fastening nut 74. Confirm that the steel beam connecting component 7 is firmly fixed on the H-shaped steel beam 5 without shaking. The installation of steel beam connecting component 7 is then complete.

[0054] S5, Install the cantilever rod 2 and the horizontal safety net 1: Rotate the U-shaped rotating plate 62 until its side wall is parallel to the side of the lower floor slab 4. Use the second bolt 65 to pass through the side wall of the U-shaped rotating plate 62 and the cantilever rod 2 to fix the cantilever rod 2 on the U-shaped rotating plate 62. Fix the wire rope 8 on the first ear plate 21 inside the building. After the other end of the wire rope 8 passes through the second ear plate 75, fix it to the third ear plate 67 or the hand crank 68. Then install the horizontal safety net 1 at the cantilever end of the cantilever rod 2.

[0055] S6, Extend the cantilever pole 2 and tie the horizontal safety net 1: Rotate the U-shaped rotating plate 62 90° to extend the cantilever pole 2 outside the building. At this time, the U-shaped rotating plate 62 just abuts against the vertical baffle 631 of the limiting device 63. Then, move the L-shaped buckle plate 632 to make the L-shaped buckle plate 632 engage with the U-shaped rotating plate 62 and fix it securely. After the cantilever pole 2 extends out of the lower floor slab 4, pull the steel wire rope 8 by hand or hand crank 68 to rotate the cantilever pole 2 vertically to the upper floor slab 3. Then, complete the tying of the horizontal safety net 1.

[0056] S7, Install safety bolts: Install safety bolts in the safety holes 66 of the U-shaped rotating plate 62, and place the cantilever rod 2 against the safety bolts so that the cantilever rod 2 is locked at the specified angle. If a high object falls onto the horizontal safety net 1 and the wire rope 8 breaks, the safety bolts can act as a safety device to prevent the cantilever rod 2 from tilting directly, thus increasing the safety factor.

[0057] S8, Unfold the horizontal safety net 1: Operate the remote-controlled electric drive device 22 to unfold the horizontal safety net 1, thus completing the installation of the entire system.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of installing a rotating overhanging horizontal safety net system, characterized by: The rotating overhanging horizontal safety net (1) system comprises a horizontal safety net (1), an overhanging rod (2), an upper floor (3), a lower floor (4), an H-shaped steel beam (5) arranged at the lower end face edge of the upper floor (3), a fixing assembly (6) arranged at the lower floor (4), a steel beam connecting assembly (7) arranged on the H-shaped steel beam (5), and a steel wire rope (8) for pulling up the overhanging rod (2); One end of the overhanging rod (2) is fixedly arranged on the fixing assembly (6), and the other end is overhanging to the outside, the overhanging end of the overhanging rod (2) is higher than the upper floor (3), the horizontal safety net (1) is arranged between the overhanging end of the overhanging rod (2) and the upper floor (3), and a first lug plate (21) is fixedly arranged at the upper end face of the middle part of the overhanging rod (2); The fixing assembly (6) comprises a fixed plate, a U-shaped rotating plate (62) and a limiting device (63) for fixing the position of the U-shaped rotating plate (62); the fixed plate is a rectangular plate and is fixedly arranged at the upper end face edge of the lower floor (4); the U-shaped rotating plate (62) is arranged at the upper end face of the fixed plate, the center of the bottom plate (61) of the U-shaped rotating plate (62) is connected with the fixed plate through a first bolt (64), the bolt head of the first bolt (64) is located at the lower end face of the fixed plate, the bolt body of the first bolt (64) penetrates through the fixed plate and the bottom plate (61) of the U-shaped rotating plate (62) and extends upwards, and the U-shaped rotating plate (62) can rotate with the first bolt (64) as the axis; the two side walls of the U-shaped rotating plate (62) are connected with the overhanging rod (2) through a second bolt (65), and the overhanging rod (2) can rotate with the second bolt (65) as the axis; The side wall of the U-shaped rotating plate (62) and the right side of the second bolt (65) are further provided with a plurality of safety holes (66) at intervals, and a safety bolt is arranged on each safety hole (66); The limiting device (63) is arranged at the upper end face of the fixed plate and comprises a vertical baffle (631) and an L-shaped buckle plate (632), the vertical part top end of the L-shaped buckle plate (632) is movably connected with the vertical baffle (631) top end through a hinge (633); the vertical baffle (631) bottom end is fixedly arranged at the corner of the fixed plate far away from the edge of the lower floor (4), and the vertical baffle (631) is perpendicular to the side wall of the U-shaped rotating plate (62); The steel beam connecting assembly (7) comprises a U-shaped clamping plate (71), a J-shaped screw rod (72) and a fixed tube (73); the two side walls of the U-shaped clamping plate (71) are respectively clamped on the upper end face and the lower end face of the lower flange plate outside the web of the H-shaped steel beam (5); the fixed tube (73) is arranged at the lower end face of the lower side wall of the U-shaped clamping plate (71), and the lower end face of the fixed tube (73) is fixedly provided with a second lug plate (75); the short rod of the J-shaped screw rod (72) is arranged on the upper end face of the lower flange plate inside the web of the H-shaped steel beam (5), the long rod of the J-shaped screw rod (72) is arranged on the lower end face of the lower flange plate inside the web of the H-shaped steel beam (5), and the long rod of the J-shaped screw rod (72) is threadedly connected with the fixed tube (73) and is fastened through a fastening nut (74); One end of the steel wire rope (8) is fixed on the first lug plate (21), and the other end penetrates through the second lug plate (75) and is arranged on the U-shaped rotating plate (62); The installation method of the rotating cantilever horizontal safety net (1) system as described above comprises the following steps: S1, measuring and laying out: measure and lay out the center points of the fixed plates and the positions of the steel beam connecting assemblies (7) every 6-8 m on the edges of the lower floor (4); S2, installing the limiting device (63): fix the limiting device (63) on the fixed plate; S3, installing the fixed plate and the U-shaped rotating plate (62): take one first bolt (64), pass the first bolt (64) from the center of the lower end surface of the fixed plate upwards and fix it, then take four expansion bolts, fix the four corners of the fixed plate on the lower floor (4) respectively, make the first bolt (64) pass through the bottom plate (61) of the U-shaped rotating plate (62) and preliminarily fix it with a nut, and confirm that the U-shaped rotating plate (62) can rotate around the first bolt (64) as the axis; S4, installing the steel beam connecting assembly (7): assemble the steel beam connecting assembly (7) on the ground, after the assembly is completed, workers use a portal frame or a folding ladder to clamp the U-shaped clamping plate (71) on the H-shaped steel beam (5), then insert the J-shaped screw rod (72) into the fixed tube (73) and fasten it with the fastening nut (74), confirm that the steel beam connecting assembly (7) is fixed firmly on the H-shaped steel beam (5) without shaking, and complete the installation of the steel beam connecting assembly (7); S5, installing the cantilever rod (2) and the horizontal safety net (1): rotate the U-shaped rotating plate (62) to make its side wall parallel to the edge of the lower floor (4), pass the second bolt (65) through the side wall of the U-shaped rotating plate (62) and the cantilever rod (2), fix the cantilever rod (2) on the U-shaped rotating plate (62), fix the steel wire rope (8) on the first ear plate (21) in the building, fix the other end of the steel wire rope (8) on the U-shaped rotating plate (62) after passing through the second ear plate (75), and then install the horizontal safety net (1) on the cantilever end of the cantilever rod (2); S6, cantilevering the cantilever rod (2) and binding the horizontal safety net (1): rotate the U-shaped rotating plate (62) by 90°, cantilever the cantilever rod (2) out of the building, at this time the U-shaped rotating plate (62) just abuts against the vertical baffle (631) of the limiting device (63), then move the L-shaped buckle plate (632) to make it clamped with the U-shaped rotating plate (62) and fixed firmly; after the cantilever rod (2) is cantilevered out of the lower floor (4), pull the steel wire rope (8) to rotate the cantilever rod (2) vertically towards the upper floor (3), cantilever it to the position of the upper floor (3) and then complete the binding work of the horizontal safety net (1); S7, installing the safety bolt: install the safety bolt in the safety hole (66) of the U-shaped rotating plate (62), and make the cantilever rod (2) abut against the safety bolt; S8, unfolding the horizontal safety net (1): unfold the horizontal safety net (1) by remote control of the electric drive device, and thus complete the installation of the whole system.

2. A method of installing a rotating overhanging horizontal safety net system according to claim 1, characterized in that: The bottom plate (61) of the U-shaped rotating plate (62) is provided with a third ear plate (67) for passing and fixing the steel wire rope (8).

3. The method of installing a rotating overhanging horizontal safety net system of claim 1, wherein: The side wall of the U-shaped rotating plate (62) is provided with a hand crank (68) for pulling and fixing the steel wire rope (8).

4. The method of installing a rotating overhanging horizontal safety net system of claim 1, wherein: The overhanging end of the overhanging rod (2) is fixedly provided with a fourth lug plate (23) for fixing the horizontal safety net (1).

5. The method of installing a rotating overhanging horizontal safety net system of claim 1, wherein: The overhanging end of the overhanging rod (2) is fixedly provided with a remote control electric drive device (22) for unfolding the horizontal safety net (1).

6. The method of installing a rotating overhanging horizontal safety net system of claim 1, wherein: The height of the vertical part of the L-shaped buckle plate (632) is not less than the distance between the two side walls of the U-shaped rotating plate (62), and the length of the horizontal part of the L-shaped buckle plate (632) is not greater than the height of the side wall of the U-shaped rotating plate (62).

7. The method of installing a rotating overhanging horizontal safety net system of claim 1, wherein: The first bolt (64) is located directly below the second bolt (65), and the height of the first bolt (64) extending out of the U-shaped rotating plate (62) is not less than one half of the length of the cross section of the overhanging rod (2).

8. The method of installing a rotating overhanging horizontal safety net system of claim 1, wherein: The overhanging rod (2) and the fixed tube (73) are square steel tubes, and the U-shaped rotating plate (62), the fixed plate, the U-shaped clamping plate (71), the vertical baffle (631) and the L-shaped buckle plate (632) are all steel plates.

9. A method of installing a rotating overhanging horizontal safety net system according to claim 8, characterized in that: The fixed tube (73) and the U-shaped clamping plate (71), the vertical baffle (631) and the fixed plate are all welded and fixed.

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