Fabricated building cantilever scaffold
By designing prefabricated cantilever scaffolding, and utilizing the combination of mounting bases, positioning bases, and threaded caps, the problem of time-consuming and labor-intensive connection of cantilever scaffolding is solved, achieving efficient and safe high-altitude operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-20
AI Technical Summary
Existing cantilever scaffolding uses fixed I-beams to support the vertical, horizontal, and small crossbars, which are connected and positioned by fasteners. This is time-consuming and labor-intensive, affecting the safety and efficiency of construction workers working at heights.
The prefabricated cantilever scaffolding used in the construction includes floor slabs, I-beams, and uprights. The installation convenience and stability of horizontal bars and small horizontal bars are improved through the cooperation of mounting seats, positioning seats, and threaded caps. Limit sleeves and clasps are used to enhance the stability of the connection.
It improves the installation efficiency and safety of cantilever scaffolding, reduces the time spent working at height, and enhances the stability and convenience of connections.
Smart Images
Figure CN224016726U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, and in particular to prefabricated building cantilever scaffolding. Background Technology
[0002] Prefabricated cantilever scaffolding is a scaffolding system used in the construction of prefabricated buildings. Cantilever scaffolding involves prefabricating some scaffolding components in a factory, transporting them to the construction site, fixing them to the building's facade via cantilever structures, and then assembling them. Cantilever scaffolding serves as a working platform to ensure the smooth progress of various construction processes.
[0003] Existing cantilever scaffolding consists of cantilever beams, uprights, horizontal bars, scissor braces, footboards, wall ties, etc. The cantilever beams are usually made of I-beams or channel steel and are fixed to the building structure as the supporting structure of the scaffolding. The uprights, horizontal bars, and small crossbars are fixed together by couplers, thus forming a skeleton support structure on the outer surface of the building for construction workers to walk and work. Cantilever scaffolding can be erected in sections, saving materials and is suitable for high-rise building construction.
[0004] Existing cantilever scaffolding typically uses fixed I-beams to support the cantilevered uprights, horizontal bars, and small horizontal bars. These uprights, horizontal bars, and small horizontal bars are usually made of cast iron and are installed and positioned using fasteners. This process is time-consuming and labor-intensive, requiring construction workers to work at heights for extended periods, which affects the safety and efficiency of high-altitude construction work using cantilever scaffolding. Utility Model Content
[0005] To overcome the problems of existing cantilever scaffolding, which typically uses fixed I-beams to support the vertical, horizontal, and small horizontal bars, and whose vertical, horizontal, and small horizontal bars are usually made of cast iron and are connected and positioned by fasteners, which is time-consuming and labor-intensive, requires construction workers to work at height for long periods of time, thus affecting the safety and efficiency of high-altitude construction operations.
[0006] The technical solution of this utility model is as follows: a prefabricated cantilever scaffold for buildings, including floor slabs, I-beams, and uprights. The I-beams are fixed to the surface of the floor slabs, and the uprights are installed on the top of the I-beams. A mounting seat is sleeved in the middle of the upright. A first positioning seat is fixed on the side wall of each mounting seat, and a second positioning seat is fixed on the side wall of each first positioning seat. A horizontal bar is inserted into the middle of the first positioning seat, and a small horizontal bar is inserted into the middle of the second positioning seat. Two first threaded caps are rotatably connected to the side wall of the first positioning seat, and a second threaded cap is rotatably connected to the side wall of the second positioning seat. Limit sleeves are threadedly connected to the ends of the mounting seat and the first positioning seat.
[0007] Furthermore, the first positioning seat and the second positioning seat have the same external dimensions, and the first threaded cap and the second threaded cap have the same external dimensions.
[0008] Furthermore, a through groove is provided in the middle of the first positioning seat, and the through groove tube passes through the first positioning seat for the horizontal rod to be inserted. The external dimensions of the horizontal rod are adapted to the internal dimensions of the through groove, which improves the positioning accuracy of the horizontal rod insertion.
[0009] Furthermore, a slot is provided at the end of the second positioning seat, and the internal dimensions of the slot are adapted to the external dimensions of the small crossbar, which improves the accuracy of the small crossbar insertion and positioning.
[0010] Furthermore, several sets of U-shaped steel are fixed on the surface of the floor slab, and I-beams are sequentially inserted into the middle of the U-shaped steel. Anchor plates are threaded to the top of each U-shaped steel, and wooden wedges are inserted into the side walls of the I-beams near the U-shaped steel, which improves the stability of the I-beam support.
[0011] Furthermore, two first positioning rods are fixed to the top of the I-beam, and the uprights are sequentially sleeved on the outer surface of the first positioning rods. The bottom of the I-beam is fixed with a buckle.
[0012] Furthermore, each pole has a support base fixed to its top, and a second positioning rod is fixed to the middle of each support base. The external dimensions of the second positioning rod are adapted to the internal dimensions of the bottom of the pole, which improves the convenience of vertical extension of the pole.
[0013] Furthermore, a first groove is provided in the middle of the limiting sleeve, and the outer dimensions of the first groove are adapted to the outer dimensions of the first positioning seat and the second positioning seat in sequence. A second groove is provided at the other end of the limiting sleeve, and a retaining ring is engaged on the inner side wall of the second groove, which improves the stability of the limiting sleeve.
[0014] The beneficial effects of this utility model are:
[0015] Compared to traditional prefabricated cantilever scaffolding, this system improves the ease of installation and positioning of horizontal bars and small horizontal bars through the cooperation of uprights, mounting bases, first positioning bases, and second positioning bases. The cooperation of the first positioning base, first threaded cap, and horizontal bar enhances the stability and convenience of horizontal bar connection. Furthermore, the cooperation of the second positioning base, second threaded cap, and small horizontal bar improves the stability and convenience of small horizontal bar installation, thereby increasing installation efficiency and safety. Secondly, the inclusion of a second slot and a retaining ring, with the retaining ring being circular and conforming to the external dimensions of the horizontal bar and small horizontal bar, enhances the stability of the limiting sleeve fitted onto the outer surface of the horizontal bar and small horizontal bar. Attached Figure Description
[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of the prefabricated cantilever scaffolding of this utility model.
[0017] Figure 2 The diagram shown is a schematic representation of the pole structure of this utility model.
[0018] Figure 3 The diagram shown is a schematic representation of the I-beam structure of this utility model.
[0019] Figure 4 The diagram shown is a schematic representation of the structure of the first positioning seat of this utility model.
[0020] Figure 5 The diagram shown is a schematic diagram of the limiting sleeve structure of this utility model.
[0021] Explanation of reference numerals in the attached drawings: 1. Floor slab; 2. I-beam; 3. Vertical pole; 4. Horizontal pole; 5. Mounting base; 6. First positioning base; 7. Second positioning base; 8. Small horizontal bar; 9. Limiting sleeve; 10. U-shaped steel; 11. Anchor plate; 12. First positioning rod; 13. Buckle; 14. Through groove; 15. First threaded cap; 16. Slot; 17. Second threaded cap; 18. Support base; 19. Second positioning rod; 20. First slot; 21. Second slot; 22. Snap ring. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Among the currently discovered feasible technologies, the following are described:
[0024] Prefabricated construction is a new type of construction method with many advantages such as high efficiency and environmental protection. Prefabricated construction refers to transferring a large amount of on-site work in traditional construction methods to factories. Building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) are processed and manufactured in factories, transported to the construction site, and assembled on-site using reliable connection methods. In prefabricated construction, cantilevered scaffolding is also frequently used. In the construction stages such as component installation and exterior wall decoration, cantilevered scaffolding is needed to provide a safe and reliable working platform to ensure the safety of construction workers and the smooth progress of construction. At the same time, when designing and using cantilevered scaffolding, the structural characteristics and construction loads of prefabricated buildings must be fully considered to ensure that the connection between the scaffolding and the building structure is firm and reliable, and does not affect the structural safety and construction quality of the prefabricated building.
[0025] Cantilevered scaffolding is a common type of scaffolding used in construction, especially suitable for high-rise buildings or construction sites with limited space. Cantilevered scaffolding typically includes: cantilever beams, usually made of I-beams or channel steel, which are the key load-bearing components. One end of the cantilever beam is fixed to the building structure, such as a concrete beam, column, or shear wall, while the other end cantilevers out of the building to support the scaffold uprights. The length and type of the cantilever beam are designed and calculated based on the scaffold height, load, and building structure, generally between 1.2 and 2.0 meters; and uprights, which are perpendicular to the ground and are the main load-bearing components of the scaffold. The uprights are connected to the cantilever beams via couplers, transferring the load from the scaffold to the cantilever beams. The spacing of the uprights is generally determined based on the construction load and the requirements of the scaffold, typically between 1.5 and 2.0 meters. To ensure the stability of the scaffolding, the uprights should be equipped with longitudinal and transverse ground bracing, with the ground bracing not exceeding 200 mm above the ground. Horizontal bracing consists of longitudinal and transverse members. Longitudinal members run longitudinally along the scaffolding and connect to the uprights, bearing the load from the scaffold boards and transferring it to the uprights. Transverse members are perpendicular to the longitudinal members and connect to the uprights or longitudinal members at both ends. Their main function is to support the scaffold boards and enhance the lateral stiffness of the scaffolding. The spacing of the horizontal members should be determined based on the length and load-bearing capacity of the scaffold boards, generally not exceeding 1.5 meters. Scissor bracing, installed on the outside of the scaffolding, consists of diagonal members arranged in a scissor-like pattern. The function of scissor bracing is to enhance the overall stability and anti-overturning capacity of the scaffolding, evenly distributing the load on the scaffolding to the ground. Scissor bracing should be continuously installed from the bottom to the top of the scaffolding. Scaffold boards, laid on the horizontal bars, serve as platforms for workers to walk and operate. Scaffold boards should be made of sturdy, non-slip materials, such as wooden, steel, or bamboo boards. The length of a scaffold board is generally 2-4 meters, and the width should not be less than 200 millimeters. Scaffold boards should be laid fully and securely, with both ends reliably fixed to the horizontal bars to prevent protruding boards. Safety protection facilities include safety nets, guardrails, and toe boards. Safety nets should be hung on the outside of the scaffolding to prevent people and objects from falling. Guardrails are installed at the edge of the working level of the scaffolding, with a height of not less than 1.2 meters. They can be made of steel pipes or other materials and should be sturdy and reliable, able to withstand a certain amount of impact. Toe boards are installed at the edge of the scaffold boards, generally 180-200 millimeters high, to prevent objects from slipping off the edge of the scaffold boards.
[0026] Cantilever scaffolding transfers the load of the scaffolding to the building structure through cantilever beams. The anchoring ends of the cantilever beams are reliably connected to the building structure through chemical anchors, expansion bolts, or embedded parts. The cantilever ends bear the self-weight of the scaffolding, the load of construction personnel and materials, etc. Under the action of load, the cantilever beams undergo bending deformation, and at the same time, through the connection with the uprights, the load is transferred to the building structure.
[0027] The uprights, horizontal bars, and scissor braces of the scaffolding form a spatial truss structure that collectively bears the load and transfers it to the cantilever beams. During this process, the structure maintains overall stability and balance through the interaction and constraints between its components. The axial pressure of the uprights is evenly transferred to the cantilever beams through the distribution effect of the horizontal bars and scissor braces, avoiding localized stress concentration. Simultaneously, the scissor braces enhance the spatial stiffness and torsional resistance of the scaffolding structure, enabling it to better resist horizontal forces such as wind loads and construction vibrations.
[0028] For cantilever scaffolding installation, workers first install cantilever beams on the building structure according to design requirements, ensuring the beams are securely anchored and that the horizontal and vertical alignment of the cantilever ends meets requirements. Then, erect uprights on the cantilever beams, ensuring they are vertically aligned and securely connected. Next, install longitudinal and transverse horizontal members to form the basic scaffolding framework. Afterward, install scissor braces, wall ties, and other components according to design requirements to enhance the stability of the scaffolding. Finally, lay scaffold boards on the working level and install safety protection facilities such as safety nets, guardrails, and toe boards.
[0029] Example 1
[0030] The prefabricated building cantilever scaffolding includes a floor slab 1, I-beams 2, and uprights 3. The floor slab 1 is a prefabricated building structure used for support and limitation. The I-beams 2 are fixed to the surface of the floor slab 1. The I-beams 2 are made of steel and are used for load-bearing. The uprights 3 are installed on the top of the I-beams 2. A mounting seat 5 is fitted in the middle of the upright 3. A first positioning seat 6 is fixed to the side wall of each mounting seat 5. A second positioning seat 7 is fixed to the side wall of each first positioning seat 6. A horizontal bar 4 is inserted into the middle of each first positioning seat 6. A small horizontal bar 8 is inserted into the middle of each second positioning seat 7. Two first threaded caps 15 are rotatably connected to the side wall of each first positioning seat 6. The side wall of each second positioning seat 7... The upper part is rotatably connected to a second threaded cover 17. The external dimensions of the first positioning seat 6 and the second positioning seat 7 are the same. The external dimensions of the first threaded cover 15 and the second threaded cover 17 are the same. A through groove 14 is provided in the middle of the first positioning seat 6. The through groove 14 passes through the first positioning seat 6 for the horizontal rod 4 to be inserted. The external dimensions of the horizontal rod 4 are adapted to the internal dimensions of the through groove 14, which improves the positioning accuracy of the horizontal rod 4. A slot 16 is provided at the end of the second positioning seat 7. The internal dimensions of the slot 16 are adapted to the external dimensions of the small horizontal rod 8, which improves the positioning accuracy of the small horizontal rod 8. The ends of the mounting seat 5 and the first positioning seat 6 are threadedly connected to limit sleeves 9.
[0031] Several sets of U-shaped steel 10 are fixed on the surface of floor slab 1. I-beams 2 are sequentially clamped in the middle of the U-shaped steel 10. Anchor plates 11 are threaded to the top of each U-shaped steel 10. Wooden wedges are clamped to the side wall of each I-beam 2 near the U-shaped steel 10, which improves the stability of the I-beam 2 support.
[0032] Two first positioning rods 12 are fixed to the top of the I-beam 2, and the uprights 3 are sequentially sleeved on the outer surface of the first positioning rods 12, which improves the convenience of the uprights 3 in installation and positioning. The bottom of the I-beam 2 is fixed with a buckle 13, and the top of the uprights 3 is fixed with a support seat 18. The middle of the support seat 18 is fixed with a second positioning rod 19. The external dimensions of the second positioning rod 19 are matched with the internal dimensions of the bottom of the uprights 3, which improves the convenience of the vertical extension of the uprights 3.
[0033] The limiting sleeve 9 has a first slot 20 in the middle. The outer dimensions of the first slot 20 are adapted to the outer dimensions of the first positioning seat 6 and the second positioning seat 7. The other end of the limiting sleeve 9 has a second slot 21. The inner side wall of the second slot 21 is fitted with a retaining ring 22, which improves the stability of the limiting sleeve 9.
[0034] When using this prefabricated cantilever scaffold, the operator first embeds the U-shaped steel 10 into the floor slab 1. After the floor slab 1 has hardened, the operator then inserts the I-beams 2 into the middle of the U-shaped steel 10. Anchor plates 11 are then bolted to the top of the U-shaped steel 10 for support and limitation. Wooden wedges are then inserted into the sidewalls of the I-beams 2 near the U-shaped steel 10, improving the stability of the I-beams 2 inserted into the middle of the U-shaped steel 10. Steel wire ropes can be tied to the outer surface of the buckle 13, with the other end tied to the sidewall of the I-beam 2. The operator improves the ease of installation and positioning of the uprights 3 by sequentially fitting the bottom end of the upright 3 onto the outer surface of the first positioning rod 12. The operator rotates the upright 3 to make the first positioning seat 6 and the second positioning seat 7 collinear. The operator can then insert the horizontal bar 4. Inside the through groove 14, rotating the first threaded cover 15 expands the adjustment range of the horizontal rod 4. Then, one end of another horizontal rod 4 is inserted from the other end of the first positioning seat 6 into the middle of the through groove 14. Rotating the first threaded cover 15 covers the horizontal rod 4. Then, rotating the limiting sleeve 9 fitted on the outer surface of the two horizontal rods 4 clockwise, so that the limiting sleeve 9 is threadedly connected to the outer surface of the first positioning seat 6 and the first threaded cover 15 in sequence, thereby improving the stability of the connection between the upright rod 3 and the horizontal rod 4. The operator then inserts both ends of the small horizontal rod 8 into the inside of the slot 16 in sequence, and then rotates the limiting sleeve 9 fitted on the outer surface of the small horizontal rod 8, so that the limiting sleeve 9 is threadedly connected to the outer surface of the second positioning seat 7 and the second threaded cover 17, thereby improving the efficiency of the installation and positioning of the small horizontal rod 8, and thus improving the efficiency of the assembly and positioning of the upright rod 3, the horizontal rod 4 and the small horizontal rod 8.
[0035] The sliding loosening of the limiting sleeve 9 is also considered. A retaining ring 22 is engaged, which is engaged inside the second slot 21. The internal dimensions of the retaining ring 22 are adapted to the external dimensions of the upright 3, the horizontal bar 4 and the small crossbar 8, thereby improving the stability of the limiting sleeve 9.
[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A prefabricated building cantilever scaffold, characterized in that, It includes a floor slab (1), an I-beam (2) and a vertical pole (3): the I-beam (2) is fixed on the surface of the floor slab (1), the vertical pole (3) is installed on the top of the I-beam (2), the middle of the vertical pole (3) is fitted with a mounting seat (5), the side wall of the mounting seat (5) is fixed with a first positioning seat (6), the side wall of the first positioning seat (6) is fixed with a second positioning seat (7), the middle of the first positioning seat (6) is inserted with a horizontal bar (4), the middle of the second positioning seat (7) is inserted with a small horizontal bar (8), the side wall of the first positioning seat (6) is rotatably connected with two first threaded caps (15), the side wall of the second positioning seat (7) is rotatably connected with a second threaded cap (17), and the ends of the mounting seat (5) and the first positioning seat (6) are threadedly connected with limit sleeves (9).
2. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: The first positioning seat (6) and the second positioning seat (7) have the same external dimensions, and the first threaded cover (15) and the second threaded cover (17) have the same external dimensions.
3. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: The first positioning seat (6) has a through groove (14) in the middle. The through groove (14) passes through the first positioning seat (6) for the horizontal rod (4) to be inserted. The external dimensions of the horizontal rod (4) are adapted to the internal dimensions of the through groove (14).
4. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: The end of the second positioning seat (7) is provided with a slot (16), and the internal dimensions of the slot (16) are adapted to the external dimensions of the small crossbar (8).
5. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: Several sets of U-shaped steel (10) are fixed on the surface of the floor slab (1). I-beams (2) are sequentially clamped in the middle of the U-shaped steel (10). Anchor plates (11) are threaded to the top of each U-shaped steel (10). Wooden wedges are clamped to the side wall of each I-beam (2) near the U-shaped steel (10).
6. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: Two first positioning rods (12) are fixed at the top of the I-beam (2), and the uprights (3) are sequentially sleeved on the outer surface of the first positioning rods (12). Buckles (13) are fixed at the bottom of the I-beam (2).
7. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: Each upright (3) is fixed with a support base (18) at its top end, and a second positioning rod (19) is fixed in the middle of each support base (18). The external dimensions of the second positioning rod (19) are adapted to the internal dimensions of the bottom end of the upright (3).
8. The prefabricated cantilever scaffolding for buildings according to claim 1, characterized in that: The limiting sleeve (9) has a first slot (20) in the middle. The outer dimensions of the first slot (20) are adapted to the outer dimensions of the first positioning seat (6) and the second positioning seat (7). The other end of the limiting sleeve (9) has a second slot (21). The inner side wall of the second slot (21) is fitted with a retaining ring (22).