Maintainable safety net picking system
The detachable steel pipe fixing kit and rope design solve the problem of difficult maintenance of traditional safety nets, enabling convenient replacement and efficient maintenance of safety nets, and improving construction safety and cost-effectiveness.
Patent Information
- Application Number
- CN202423156631.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-05-12
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Traditional safety nets are difficult to maintain and replace during construction, especially in high-rise buildings where they have a short lifespan and poor durability, leading to increased safety and construction costs for high-altitude operations.
The safety net is designed with detachable lower steel pipe fixing kits and upper cable fixing kits, combined with rope design, to achieve detachable connection, allowing maintenance and replacement without the aid of a tower crane.
It simplifies the maintenance and replacement process of safety nets, reduces construction costs, improves the safety and efficiency of high-altitude operations, and extends service life.
Smart Images
Figure CN224228292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building safety auxiliary equipment technology, and more specifically to a maintainable safety netting system. Background Technology
[0002] With the acceleration of urbanization, the scale of construction projects is constantly expanding, and the height of buildings is gradually increasing. Working at heights has become an indispensable part of construction, but the risk of falls from heights is also increasing. To ensure the safety of construction workers, safety nets, as an important fall protection device, are widely used on construction sites. However, traditional safety nets often face difficulties in later maintenance. Due to limitations in their structural design and the complexity of their installation, it is difficult to inspect, repair, and replace them during construction. Through in-depth research on construction sites and analysis of past accident cases, it has been found that traditional safety nets, after prolonged placement, suffer damage due to the impact of falling objects, rendering them ineffective.
[0003] Furthermore, most existing construction safety nets are fixed to structural columns, making them difficult to replace and maintain if damaged. In addition, construction periods in high-rise public buildings often exceed three years, sometimes even surpassing the lifespan of traditional safety nets. Traditional nets suffer from drawbacks such as difficulty in disassembly and poor durability, resulting in limited applicability in high-rise public buildings.
[0004] Therefore, how to provide a maintainable and safe netting system that not only provides more reliable safety for construction workers, but also extends the service life of the netting and reduces construction costs through convenient post-maintenance is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] Therefore, the purpose of this utility model is to propose a solution to the shortcomings of the existing safety net fixed by a column.
[0006] The technical solution of this utility model is a maintainable and safe net lifting system, including:
[0007] The lower steel pipe fixing kit is used to fix the lower floor slab.
[0008] Upper cable fixing kit, fixed to the upper floor slab;
[0009] The safety net has one end detachable from the lower steel pipe fixing kit, and the lower steel pipe fixing kit has at least some detachable components.
[0010] One end of the rope is connected to the upper cable fixing kit, and the other end is connected to the other end of the safety net;
[0011] In the protective outrigger state, the safety net is tilted between the upper and lower floor slabs, and in the maintenance outrigger state, the safety net is retracted to the lower floor slab.
[0012] According to the technical solution of this utility model, the lower steel pipe fixing kit includes:
[0013] The bottom layer is embedded in a slab and fixed to the floor slab below.
[0014] The bottom vertical plate is fixed to the top of the bottom embedded plate;
[0015] The bottom horizontal plate is horizontally connected to the bottom vertical plate at one end, and a keel pre-reserved hole is opened at the other end.
[0016] According to the technical solution of this utility model, two fixing holes are provided on the bottom vertical plate, and the two fixing holes are on the same straight line. A fixing hole is provided on one end of the bottom horizontal plate opposite to the two fixing holes, and the two fixing holes are detachably connected by fasteners.
[0017] According to the technical solution of this utility model, the bottom embedded plate is provided with multiple anchor plate fixing holes.
[0018] According to the technical solution of this utility model, the upper cable fixing kit includes:
[0019] The upper embedded plate has upper embedded plate fixing holes and is fixed to the upper floor slab by connectors;
[0020] The upper plate is vertically fixed to the top of the upper buried plate and has a through hole for connecting the other end of the rope.
[0021] According to the technical solution of this utility model, the upper vertical plate also includes a reserved perforation.
[0022] According to the technical solution of this utility model, the safety net includes:
[0023] Four keels form the frame;
[0024] Mesh body one and mesh body two are fixed in layers within the mesh frame, forming a double-layer mesh structure with two different mesh sizes arranged alternately.
[0025] According to the technical solution of this utility model, on the keel at the end away from the lower floor slab, there are two rope hanging points corresponding to the perforations of the two upper cable fixing kits. On the keel at the end close to the lower floor slab, there are two keel connection points connected to the two keel reserved holes. The distance between the two rope hanging points is greater than the distance between the two keel connection points.
[0026] According to the technical solution of this utility model, the rope is a stay cable, and both ends of the rope are fixed by rigging loops and rope clamps, with the rope end reserved.
[0027] As can be seen from the above technical solution, compared with the prior art, the technical effects of this utility model are as follows:
[0028] To facilitate the maintenance and replacement of safety netting by construction workers, this utility model offers two modes: "cantilevered protection mode" and "retracted maintenance mode." Switching between these modes is achieved by adjusting the lower steel pipe fixing components (the bottom horizontal plate and bottom vertical plate are detachably connected). In the "retracted maintenance mode," the safety netting is further away from the edge of the lower floor slab, ensuring the safety and efficiency of maintenance and replacement operations for construction workers.
[0029] The "recovery and maintenance state" of this utility model focuses on recovery and maintenance. Its advantage over traditional cantilever net designs lies in the fact that dismantling the cantilever net later does not require the assistance of a tower crane; workers only need to disassemble the fasteners (bolts) of the steel pipe fixing kit. When the floor area of a building is large, a large number of safety cantilever nets are needed, which would seriously waste tower crane lifts during later dismantling. This utility model, through the optimized design of the steel pipe fixing kit, allows the safety cantilever net to be dismantled without the assistance of a tower crane, and can be done manually.
[0030] This invention realizes the design of a maintainable safety cantilever net system under the HSE (Health, Safety, and Environment) framework, improving the safety of high-rise operations. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0032] Figure 1A schematic diagram of a maintainable safety net lifting system provided by this utility model;
[0033] Figure 2 A side view of a maintainable safety cantilever net system structure provided by this utility model;
[0034] Figure 3 This diagram illustrates a comparison between the present invention in its retracted maintenance state and its extended protective state.
[0035] Figure 4 The diagram illustrates the protective state of the safety net extended beyond its protective barrier.
[0036] Figure 5 This diagram illustrates the safety net being retracted for maintenance.
[0037] Figure 6 The main view of the lower steel pipe fixing kit is shown;
[0038] Figure 7 The diagram shows a top view of the lower steel pipe fixing kit;
[0039] Figure 8 The main view of the upper cable fixing kit is shown;
[0040] Figure 9 The diagram shows a top view of the upper cable fixing kit;
[0041] Figure 10 The diagram illustrates the structure of the safety net.
[0042] Figure 11 The diagram illustrates the rope in use. Detailed Implementation
[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0044] Most existing construction safety nets are fixed to the outside of structural columns using structural anchors, which leads to difficulties for workers and safety issues when working at heights near edges. If a project lacks structural columns, there may be a situation where there are "no columns to anchor to." Furthermore, if this traditional safety net structure is damaged, it is difficult to replace or maintain. In addition, in high-rise public buildings, the construction period often exceeds three years, even surpassing the lifespan of traditional safety nets. Traditional nets suffer from drawbacks such as difficulty in disassembly and poor durability, resulting in limited applicability in high-rise public buildings.
[0045] Therefore, this utility model needs to provide a maintainable and safe netting system that not only provides more reliable safety protection for construction workers, but also extends the service life of the netting and reduces construction costs through convenient post-maintenance.
[0046] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0047] The technical solution of this utility model is a maintainable and safe net lifting system. See appendix. Figure 1-5 ,include:
[0048] Lower steel pipe fixing kit 1, fixed to the lower floor slab;
[0049] Upper cable fixing kit 2, fixed to the upper floor slab;
[0050] The safety net 3 has one end detachable from the lower steel pipe fixing kit 1, and the lower steel pipe fixing kit 1 has at least some detachable components.
[0051] Rope 4, one end is connected to the upper cable fixing kit 2, and the other end is connected to the other end of the safety net 3;
[0052] In the protective state Z1, the safety net 3 is tilted between the upper and lower floor slabs, and in the maintenance state Z2, the safety net 3 is retracted to the lower floor slab.
[0053] The above technical solution uses a lower steel pipe fixing kit 1, an upper cable fixing kit 2, and ropes 4 to tilt and extend the safety net to its extended protective state Z1. The safety net is then retracted to the lower floor slab for maintenance via the detachable lower steel pipe fixing kit 1. Disassembly of the safety net later requires no tower crane assistance; workers can disassemble the steel pipe fixing kits independently. When dealing with a large number of safety nets, this solution significantly addresses the issue of insufficient tower crane lifting capacity. The optimized steel pipe fixing kits simplify operation, facilitate the use of readily available materials, and reduce costs, requiring only three steel plates, four expansion bolts, and two ordinary bolts. Traditional safety net fixing kits are complex, inconvenient for workers, and significantly increase construction costs. This solution reduces the danger and difficulty of high-altitude edge work for workers.
[0054] See appendix Figure 6 and 7 In the embodiments of this utility model, the steel pipe fixing kit is easy to construct and readily available in local materials, saving costs. The lower steel pipe fixing kit 1 consists of three parts: a bottom embedded plate 11, a bottom vertical plate 13, and a bottom horizontal plate 12.
[0055] The bottom embedded plate 11 is fixed to the lower floor slab; the bottom vertical plate 13 is vertically fixed to the top of the bottom embedded plate 11; one end of the bottom horizontal plate 12 is horizontally connected to the bottom vertical plate 13, and the other end is provided with a keel reserved hole 121.
[0056] In a specific implementation, the bottom embedded plate 11 is fixed to the lower floor slab with four M12 expansion bolts. The bottom vertical plate 13 is welded to the geometric center of the bottom embedded plate 11. The bottom horizontal plate 12 is connected to the bottom vertical plate 13 with two M20 bolts. A keel pre-drilled hole 121 with a diameter of about 50mm is reserved at the end of the bottom horizontal plate 12 to allow the safety net keel steel pipe to be inserted. Removing the two M20 bolts on the bottom horizontal plate 12 allows for the switching between the "cancelled protection state" and the "retracted maintenance state".
[0057] More specifically, the bottom vertical plate 13 has two fixing holes 131, which are on the same straight line. The bottom horizontal plate 12 has a fixing hole 122 opposite to the two fixing holes 131, which can be detachably connected by fasteners (such as bolts).
[0058] The bottom embedded plate 11 has multiple anchor plate fixing holes 111, which are used to fix the plate in conjunction with expansion bolts.
[0059] See appendix Figure 8 and 9 The upper cable fixing kit 2 includes:
[0060] The upper embedded plate 21 has upper embedded plate fixing holes 211 and is fixed to the upper floor slab by connectors.
[0061] The upper upright plate 22 is vertically fixed to the top of the upper embedded plate 21, and has a through hole 221 for connecting the other end of the rope 4. The upper upright plate 22 also includes a reserved through hole 2.
[0062] The upper embedded plate 21 is fixed to the upper floor slab using four M12 expansion bolts, and the upper vertical plate 22 is connected to the upper embedded plate 21 by welding. Two 20mm diameter through holes, 221 and 221, are pre-drilled at the top of the upper vertical plate 22. The steel wire rope cable is inserted through through hole 221, and hole 2 is reserved as a spare. The dimensions of the upper vertical plate 22 of the upper cable fixing kit can be 330mm (height) × 100mm (width) × 15mm (thickness), and the dimensions of the upper embedded plate 21 can be the same as the dimensions of the lower embedded plate of the lower steel pipe fixing kit described above.
[0063] In this utility model, see the appendix. Figure 10 The safety net 3 includes:
[0064] Four keels (31) form the frame;
[0065] Mesh body 1 32 and mesh body 2 33 are fixed in layers within the mesh frame, forming a double-layer mesh structure with two different mesh sizes arranged alternately.
[0066] The keel 31 can be 3m wide and 6m long, and can be welded from steel pipes with a specification of Φ48mm×3mm. Net body one 32 can be a 30mm mesh wire mesh, and net body two 33 can be a 50mm mesh horizontal rope net. When erecting the safety net, the outer edge is higher than the inner edge, with a horizontal angle of 15°.
[0067] Furthermore, the terms "a" and "two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "a" or "two" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0068] Advantageously, on the keel 31 at the end furthest from the lower floor slab, there are two rope hanging points G1 corresponding to the perforations 221 of the two upper cable fixing kits 2, and on the keel 31 at the end closest to the lower floor slab, there are two keel connection points G2 connected to the two keel reserved holes 121, and the distance between the two rope hanging points G1 is greater than the distance between the two keel connection points G2.
[0069] Specifically, the two lower steel pipe fixing kits for the safety net are spaced 1500mm apart, and the lower steel pipe fixing kits are 750mm away from both ends of the steel pipe keel. Each safety net keel is fixed with two lower steel pipe fixing kits, using two steel wire ropes for diagonal bracing. The rope hanging point G1 is 100mm away from both ends of the keel to ensure the load-bearing capacity of the safety net.
[0070] See appendix Figure 11Both ends are fixed by rigging loops 42 and rope clamps 41, with rope ends reserved.
[0071] This utility model uses the aforementioned rope 4 as the stay cable. A 6×19Φ12.5 steel wire rope can be selected as the stay cable for the structure (6: indicates the steel wire rope consists of 6 strands; 19: indicates each strand consists of 19 steel wires; Φ12.5: indicates the diameter of the steel wire rope is 12.5 mm). The ends of the steel wire rope are fixed using a combination of rigging collars 42, rope clamps 41, and rope clamp seats. The rope clamp spacing can be 84 mm, and the safety ring span can be 168 mm (this section is the safety ring 43), with a 120 mm steel wire rope end reserved. The upper end of the steel wire rope is fixed to the upper cable fixing kit, and the lower end is fixed to the steel pipe at the top of the safety net keel, both using the same connection method.
[0072] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0073] In use, the bottom frame of the safety cantilever net passes through the pre-drilled holes in the keel of the lower steel pipe fixing kit, and the top frame is fixed to the upper inclined cable fixing kit by steel wire ropes. The horizontal inclination angle of the safety cantilever net can be adjusted by setting the length of the steel wire ropes. The upper cable fixing kit is fixed to the upper floor slab, and the lower steel pipe fixing kit is fixed to the lower floor slab.
[0074] When maintenance is required, the bolts on the bottom horizontal plate and the bottom vertical plate are removed, and the safety net is pulled into the lower floor slab until it is laid flat on the lower floor slab. The net is then maintained without the assistance of a tower crane.
[0075] This utility model, "Maintainable Safety Cantilever Net Design under the HSE System Perspective," is applicable to most public building construction fields, and has high applicability to super high-rise buildings. This utility model integrates installation, disassembly, and maintenance; its design principle is simple and clear, its manufacturing is simple, and the materials used are readily available. Installation is quick and easy, reducing the need for construction personnel and improving labor efficiency. It solves the difficulties faced by traditional cantilever nets, improving the efficiency and quality of construction safety management. This design has low manufacturing costs, is simple to install, and convenient to use, effectively solving the problem of difficult maintenance of traditional cantilever nets. It not only provides more reliable safety protection for construction personnel but also extends the service life of the cantilever net through convenient post-construction maintenance.
[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0077] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A maintainable and safe net-lifting system, characterized in that, include: Lower steel pipe fixing kit (1) is fixed to the lower floor slab; Upper cable fixing kit (2) is fixed to the upper floor slab; Safety net (3), one end of which is detachable from the lower steel pipe fixing kit (1), the lower steel pipe fixing kit (1) having at least some detachable components; The rope (4) is connected at one end to the upper cable fixing kit (2) and at the other end to the other end of the safety net (3); In the protective state (Z1), the safety net (3) is tilted between the upper floor slab and the lower floor slab, and in the maintenance state (Z2), the safety net (3) is retracted to the lower floor slab.
2. The maintainable safety net lifting system according to claim 1, characterized in that, The lower steel pipe fixing kit (1) includes: The bottom embedded plate (11) is fixed to the lower floor slab; The bottom vertical plate (13) is vertically fixed to the top of the bottom embedded plate (11); The bottom horizontal plate (12) is horizontally connected to the bottom vertical plate (13) at one end, and a keel pre-reserved hole (121) is opened at the other end.
3. A maintainable safety net lifting system according to claim 2, characterized in that, Two fixing holes (131) are provided on the bottom vertical plate (13), and the two fixing holes (131) are on the same straight line. A fixing hole (122) is provided on one end of the bottom horizontal plate (12) opposite to the two fixing holes (131), and can be detachably connected by fasteners.
4. A maintainable safety net lifting system according to claim 2, characterized in that, The bottom embedded plate (11) has multiple anchor plate fixing holes (111).
5. A maintainable safety net lifting system according to claim 2, characterized in that, The upper cable fixing kit (2) includes: The upper embedded plate (21) has upper embedded plate fixing holes (211) and is fixed to the upper floor slab by means of connectors; The upper plate (22) is vertically fixed to the top of the upper embedded plate (21) and has a through hole (221) for connecting the other end of the rope (4).
6. A maintainable safety net lifting system according to claim 5, characterized in that, The upper vertical plate (22) also includes a reserved perforation.
7. A maintainable safety net lifting system according to claim 5, characterized in that, The safety net (3) includes: Four keels (31) form the frame; Mesh body one (32) and mesh body two (33) are fixed in layers within the mesh frame and form a double-layer mesh structure with two different meshes arranged alternately.
8. A maintainable safety net lifting system according to claim 7, characterized in that, On the keel (31) at the end away from the lower floor slab, there are two rope hanging points (G1) corresponding to the perforations (221) of the two upper cable fixing kits (2). On the keel (31) at the end closer to the lower floor slab, there are two keel connection points (G2) connected to the two keel reserved holes (121). The distance between the two rope hanging points (G1) is greater than the distance between the two keel connection points (G2).
9. A maintainable safety net lifting system according to any one of claims 1-8, characterized in that, The rope (4) is a stay cable, and both ends of it are fixed by rigging loops (42) and rope clamps (41), with the rope end reserved.