Building roof large-span cantilever component formwork

Abstract

The application provides a building roof large-span cantilever component formwork, belonging to the technical field of building roof, comprising a dismounting component, a stabilizing component and an auxiliary component, wherein the dismounting component comprises a vertical rod body and a horizontal rod body, the outer surface of the vertical rod body is fixedly connected with a fixed ring plate, the inner part of the fixed ring plate is slidably connected with a semicircular sliding plate, the outer surface of the semicircular sliding plate and the outer surface of the fixed ring plate are provided with a fixed assembly, the outer surface of the vertical rod body is symmetrically slidably connected with a sliding plate, the outer surface of the sliding plate and the outer surface of the fixed ring plate are provided with a limiting assembly, the stabilizing component comprises a circular hollow plate arranged outside the horizontal rod body, and the outer surface of the circular hollow plate and the outer surface of the sliding plate are provided with a triangular assembly; the dismounting component, the stabilizing component and the auxiliary component are arranged to solve the problems of inconvenient dismounting and deformation of the connection part under long-time stress of the building roof large-span cantilever component formwork.

Description

Technical Field

[0001] This invention belongs to the technical field of building roofs, specifically relating to a formwork support for large-span cantilever components of building roofs. Background Technology

[0002] With economic development and market demand, the functions and shapes of more and more buildings are becoming increasingly diversified. Large cantilevered balconies or similar cantilevered components are increasingly being used in building design, and various forms of cantilevered components have emerged accordingly. They can generally be divided into cantilevered, inclined, and under-braced types. Most of them require steel bars, studs, and other structural connections to the concrete structure during construction. The cantilevered component formwork is a support system composed of multiple vertical and horizontal bars, used to bear various loads during the construction process of the cantilevered component.

[0003] Currently, cantilever formwork typically utilizes multiple uprights and horizontal members connected by rigid fasteners and bolts to form a support system. Due to the large number of uprights and horizontal members and the complexity of connection points, the installation and dismantling process is extremely cumbersome, consuming a significant amount of manpower and time, and severely impacting the construction progress. Furthermore, during long-term use, the rigid fastener connection method may cause excessive pressure at the connection points between the uprights and horizontal members, leading to deformation and reducing the stability and safety of the entire support system, thus posing potential safety hazards to the construction. Summary of the Invention

[0004] The purpose of this invention is to provide a formwork support for large-span cantilever components of building roofs, aiming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A formwork support for a large-span cantilevered component of a building roof includes a disassembly and assembly component. It comprises a vertical pole body and a horizontal pole body. A fixing ring plate is fixedly connected to the outer surface of the vertical pole body. A semi-circular sliding plate is slidably connected inside the fixing ring plate. A fixing component is provided between the outer surface of the semi-circular sliding plate and the outer surface of the fixing ring plate to fix the semi-circular sliding plate. A sliding plate is symmetrically slidably connected to the outer surface of the vertical pole body. A limiting component is provided between the outer surface of the sliding plate and the outer surface of the fixing ring plate to limit the sliding plate. A stabilizing component includes a circular hollow plate disposed outside the horizontal pole body. A triangular component is provided between the outer surface of the circular hollow plate and the outer surface of the sliding plate to provide stable support for the horizontal pole body. An auxiliary component includes a reinforcing component disposed outside the circular hollow plate to enhance the stability of the triangular component.

[0006] As a preferred embodiment of the present invention, the fixing component includes a first sliding groove symmetrically formed on the outer surface of the fixing ring plate, a trapezoidal plate slidably connected inside the first sliding groove, a first spring fixedly connected to the outer surface of the trapezoidal plate, the end of the first spring away from the trapezoidal plate being fixedly connected to the inner side of the first sliding groove, and a plurality of evenly distributed square grooves formed on the outer surface of the semi-arc sliding plate, the interior of the square grooves corresponding to the outer surface of the trapezoidal plate.

[0007] As a preferred embodiment of the present invention, the limiting component includes a fixed plate fixedly connected to the outer surface of the sliding plate, the outer surface of the fixed plate having a plurality of evenly distributed limiting grooves, the outer surface of the fixed ring plate having hollow groove plates symmetrically fixedly connected, the interior of the hollow groove plates being slidably connected to the outer surface of the fixed plate, the outer surface of the hollow groove plates having a through groove, the interior of the through groove being connected to the interior of the limiting grooves.

[0008] In a preferred embodiment of the present invention, a T-shaped plate is slidably connected inside the semi-circular slide plate, and an extrusion plate is symmetrically fixedly connected to the outer surface of the T-shaped plate.

[0009] As a preferred embodiment of the present invention, a second spring is fixedly connected inside the semi-circular slide plate, and the end of the second spring away from the semi-circular slide plate is fixedly connected to the outer surface of the T-shaped plate.

[0010] In a preferred embodiment of the present invention, the end of the extrusion plate away from the T-shaped plate corresponds to the inclined end face of the trapezoidal plate, the end of the extrusion plate away from the T-shaped plate corresponds to the inside of the through groove, and the end of the extrusion plate away from the T-shaped plate corresponds to the inside of the limiting groove.

[0011] As a preferred embodiment of the present invention, the fixed ring plate is a gapped double-ring plate, and the arc-shaped end of the semi-arc sliding plate is located at the gap of the fixed ring plate.

[0012] In a preferred embodiment of the present invention, the triangular assembly includes a fixing block symmetrically fixedly connected to the outer surface of a circular hollow plate, a fixing rod fixedly connected to the outer surface of the fixing block, and a long strip plate rotatably connected to the outer surface of the fixing rod, with one end of the long strip plate away from the circular hollow plate rotatably connected to the outer surface of a sliding plate.

[0013] As a preferred embodiment of the present invention, the reinforcing component includes an arc-shaped clamping plate symmetrically slidably connected to the outer surface of a circular hollow plate. The circular hollow plate has a second sliding groove symmetrically opened inside. A third spring is fixedly connected inside the second sliding groove. The end of the third spring away from the second sliding groove is fixedly connected to the outer surface of the arc-shaped clamping plate.

[0014] In a preferred embodiment of the present invention, a semi-circular block is fixedly connected to one end of the long strip plate near the circular hollow plate, and the outer surface of the semi-circular block is in contact with the top of the arc-shaped clamping plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up disassembly and assembly components, utilizes the cooperation of a fixed ring plate, a semi-circular sliding plate, a fixing component, a sliding plate, and a limiting component to achieve rapid disassembly and assembly between the main body of the upright and the main body of the crossbar. Compared with the traditional rigid fastener bolt connection method, it greatly simplifies the installation and disassembly process, saves a lot of manpower and time, improves construction efficiency, and avoids installation errors caused by complicated connection points, thus improving construction quality.

[0016] 2. By setting up stabilizing components and utilizing the coordinated work of circular hollow plates and triangular components, this invention provides a stable support for the main body of the crossbar. The long strip plate in the triangular component is rotatably connected to the sliding plate to form a stable triangular structure, which effectively disperses various loads generated by the cantilever component during construction, enhances the stability and safety of the entire support system, and reduces the risk of deformation caused by long-term use or excessive pressure.

[0017] 3. This invention, by setting auxiliary components, utilizes reinforcement components to strengthen the stress-bearing surface of the long strip plate 213. The reinforcement process involves the tight fit between the arc-shaped clamp and the semi-circular block, which provides additional support to the load-bearing surface of the long strip when it is under load. This effectively prevents the long strip from bending or breaking due to excessive force, and further improves the stability and reliability of the entire cantilever structure formwork. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall rear view structure of the present invention; Figure 3 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B; Figure 6for Figure 5 Enlarged schematic diagram of the structure at point C; Figure 7 This is a schematic cross-sectional view of the fixed ring plate of the present invention.

[0019] In the diagram: 10. Main body of the upright; 11. Main body of the crossbar; 12. Fixing ring plate; 13. Semi-circular sliding plate; 14. Fixing component; 141. First sliding groove; 142. Trapezoidal plate; 143. First spring; 144. Square groove; 15. Sliding plate; 16. Limiting component; 161. Fixing plate; 162. Limiting groove; 163. Hollow groove plate; 164. Through groove; 17. T-shaped plate; 18. Extrusion plate; 19. Second spring; 20. Circular hollow plate; 21. Triangular component; 211. Fixing block; 212. Fixing rod; 213. Long strip plate; 30. Reinforcing component; 301. Arc-shaped clamping plate; 302. Second sliding groove; 303. Third spring; 31. Semicircular block. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Example 1

[0021] Reference Figures 1-7 This is the first embodiment of the present invention, which provides a formwork support for a large-span cantilevered component of a building roof, including assemblies and disassemblies. It includes a main upright 10 and a main horizontal bar 11. A fixing ring plate 12 is fixedly connected to the outer surface of the main upright 10. A semi-circular sliding plate 13 is slidably connected inside the fixing ring plate 12. A fixing component 14 is provided between the outer surface of the semi-circular sliding plate 13 and the outer surface of the fixing ring plate 12, for fixing the semi-circular sliding plate 13. A sliding plate 15 is symmetrically slidably connected to the outer surface of the main upright 10. A limiting component 16 is provided between the outer surface of the slide plate 15 and the outer surface of the fixed ring plate 12. The limiting component 16 is used to limit the sliding plate 15. A T-shaped plate 17 is slidably connected inside the semi-arc slide plate 13. A pressing plate 18 is symmetrically fixedly connected to the outer surface of the T-shaped plate 17. A second spring 19 is fixedly connected inside the semi-arc slide plate 13. The end of the second spring 19 away from the semi-arc slide plate 13 is fixedly connected to the outer surface of the T-shaped plate 17. The shape of the fixed ring plate 12 is a gap double ring plate. The arc end of the semi-arc slide plate 13 is located at the gap of the fixed ring plate 12.

[0022] Specifically, the fixing component 14 includes a first sliding groove 141 symmetrically formed on the outer surface of the fixing ring plate 12. A trapezoidal plate 142 is slidably connected inside the first sliding groove 141. A first spring 143 is fixedly connected to the outer surface of the trapezoidal plate 142. The end of the first spring 143 away from the trapezoidal plate 142 is fixedly connected to the inner side of the first sliding groove 141. The outer surface of the semi-arc sliding plate 13 is provided with a plurality of evenly distributed square grooves 144. The interior of the square grooves 144 corresponds to the outer surface of the trapezoidal plate 142. Furthermore, the limiting component 16 includes a fixed plate 161 fixedly connected to the outer surface of the sliding plate 15. The outer surface of the fixed plate 161 is provided with a plurality of evenly distributed limiting grooves 162. The outer surface of the fixed ring plate 12 is symmetrically fixedly connected with hollow groove plates 163. The interior of the hollow groove plates 163 is slidably connected to the outer surface of the fixed plate 161. The outer surface of the hollow groove plates 163 is provided with through grooves 164. The interior of the through grooves 164 is connected to the interior of the limiting grooves 162.

[0023] The fixing component 14 allows the semi-circular sliding plate 13 to be precisely fixed after sliding to a suitable position inside the fixing ring plate 12, through the cooperation of the trapezoidal plate 142 and the square groove 144. The limiting component 16 effectively limits the sliding plate 15, ensuring that the sliding plate 15 can stay stably after sliding to the predetermined position on the upright body 10. At the same time, the combination design of the T-shaped plate 17 and the extrusion plate 18, combined with the elasticity of the second spring 19, makes the formwork structure more adaptable and stable when dealing with cantilevered components of different sizes. When it is necessary to support the cantilevered component, the operator can adjust the position of the semi-circular sliding plate 13 on the fixing ring plate 12 according to the actual needs, and fix it with the fixing component 14. Then, slide the sliding plate 15 to a suitable position and use the limiting component 16 to limit it. This design not only improves the flexibility and efficiency of the formwork, but also greatly enhances the safety and reliability of the construction process.

[0024] Preferably, the end of the extrusion plate 18 away from the T-shaped plate 17 corresponds to the inclined end face of the trapezoidal plate 142, the end of the extrusion plate 18 away from the T-shaped plate 17 corresponds to the interior of the through groove 164, and the end of the extrusion plate 18 away from the T-shaped plate 17 corresponds to the interior of the limiting groove 162.

[0025] It should be noted that the movement of the T-shaped plate 17 drives the extrusion plate 18 to move. The end of the extrusion plate 18 away from the T-shaped plate 17 will successively contact and extrude the inclined end face of the trapezoidal plate 142, and then pass through the inside of the through slot 164 and insert into the inside of the limiting slot 162. This allows the extrusion plate 18 to precisely control the sliding of the trapezoidal plate 142 and the position of the fixing plate 161 in the hollow slot plate 163 during the movement, thereby achieving stable fixation and flexible adjustment of the entire formwork structure.

[0026] In use, first place the upright body 10 in the predetermined position, then pass the crossbar body 11 through the circular hollow plate 20 and the fixing ring plate 12, and then pull the T-shaped plate 17. The movement of the T-shaped plate 17 will stretch the second spring 19. The movement of the T-shaped plate 17 will drive the pressing plate 18 to move. The end of the pressing plate 18 away from the T-shaped plate 17 will be pulled out from the inside of the limiting groove 162, and then pulled out from the inside of the through groove 164, until it no longer contacts and presses the trapezoidal plate 142. Under the elastic action of the first spring 143, the trapezoidal plate 142 will slide in the first sliding groove 141 until it is pulled out from the square groove 144. At this time, the semi-circular sliding plate 13 can slide freely in the fixing ring plate 12. Then, according to the size of the crossbar body 11, push the semi-circular sliding plate 13 to slide in the fixing ring plate 12. When it slides to the appropriate position, release the T-shaped plate 17, so that it is in the first... Under the action of the second spring 19, the plate moves until it moves the extrusion plate 18 to the position of the trapezoidal plate 142 and makes contact with it. After being extruded, the trapezoidal plate 142 overcomes the elastic force of the first spring 143 and slides in the first slide groove 141 until it is re-inserted into the corresponding square groove 144, thus fixing the semi-arc slide plate 13. At this time, the semi-arc slide plate 13 initially clamps the crossbar body 11. Then, the sliding plate 15 slides and the fixing plate 161 slides in the hollow groove plate 163. When it slides to the appropriate position, the T-shaped plate 17 is released again, so that it resets under the action of the second spring 19, causing the extrusion plate 18 to pass through the through groove 164 again and be inserted into the corresponding limiting groove 162, thereby limiting and fixing the sliding plate 15. At this time, the sliding plate 15 and the semi-arc slide plate 13 work together to achieve stable clamping and support for the crossbar body 11. Example

[0027] Reference Figures 1-7 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a formwork support for a large-span cantilever component of a building roof, including a stabilizing component. This includes a circular hollow plate 20 disposed outside the main body 11 of the crossbar. A triangular assembly 21 is disposed between the outer surface of the circular hollow plate 20 and the outer surface of the sliding plate 15, and the triangular assembly 21 is used to provide stable support for the main body 11 of the crossbar. Specifically, the triangular component 21 includes a fixing block 211 symmetrically fixedly connected to the outer surface of the circular hollow plate 20, a fixing rod 212 fixedly connected to the outer surface of the fixing block 211, a long strip plate 213 rotatably connected to the outer surface of the fixing rod 212, and one end of the long strip plate 213 away from the circular hollow plate 20 rotatably connected to the outer surface of the sliding plate 15.

[0028] The triangular component 21 connects the circular hollow plate 20 and the long strip plate 213 through the fixing block 211, and uses the fixing rod 212 as the rotation fulcrum of the long strip plate 213, so that the long strip plate 213 can rotate adaptively according to the position change of the sliding plate 15. This makes the long strip plate 213, the crossbar body 11 and the upright body 10 form a triangular support structure. This triangular support structure has extremely high stability and can effectively distribute and bear the load from the crossbar body 11, thereby greatly enhancing the stability and deformation resistance of the entire formwork structure, effectively dispersing the pressure borne by the crossbar body 11, avoiding structural damage caused by local stress concentration, and improving the safety of construction and the stability of the formwork.

[0029] In use, when the sliding plate 15 is adjusted and moved, the long strip 213 will rotate around the fixed rod 212. Since the end of the long strip 213 away from the circular hollow plate 20 is rotatably connected to the outer surface of the sliding plate 15, the rotation of the long strip 213 can adapt to the position change of the sliding plate 15 in real time, and always maintain the triangular support structure formed with the crossbar body 11 and the upright body 10. In this process, the triangular component 21, through its unique structural design, effectively distributes the load on the crossbar body 11 to the upright body 10, greatly reducing the pressure burden on a single support point. At the same time, this triangular support structure also has good anti-deformation ability. Even when subjected to large external forces, it can maintain the overall stability and integrity of the structure, thereby ensuring the safety during construction and the long-term stability of the formwork. In addition, the setting of the triangular component 21 also makes the entire formwork structure more flexible and adaptable, and can adapt to the formwork requirements of cantilever components of different sizes and shapes, improving construction efficiency and formwork quality. Example 2

[0030] Reference Figures 1-7 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a formwork support for a large-span cantilever component of a building roof, including auxiliary components, including a reinforcing component 30 disposed outside the circular hollow slab 20. The reinforcing component 30 is used to enhance the stability of the triangular component 21.

[0031] Specifically, the reinforcing component 30 includes an arc-shaped clamping plate 301 symmetrically slidably connected to the outer surface of the circular hollow plate 20. The circular hollow plate 20 has a second sliding groove 302 symmetrically opened inside. A third spring 303 is fixedly connected inside the second sliding groove 302. The end of the third spring 303 away from the second sliding groove 302 is fixedly connected to the outer surface of the arc-shaped clamping plate 301. A semi-circular block 31 is fixedly connected to the end of the long strip plate 213 near the circular hollow plate 20. The outer surface of the semi-circular block 31 is in contact with the top of the arc-shaped clamping plate 301.

[0032] The reinforcement component 30 is designed so that when the sliding plate 15 moves and adjusts, it drives the two long strips 213 to rotate around the fixed rod 212, which in turn drives the semicircular block 31 to move. The semicircular block 31 presses the arc-shaped clamping plate 301, causing it to slide on the circular hollow plate 20 towards the second slide groove 302. At the same time, it compresses the third spring 303, and the two arc-shaped clamping plates 301 gradually move towards the middle until they fit against the crossbar body 11, increasing the force-bearing surface of the two long strips 213 and enhancing the stability of the triangular component 21.

[0033] In use, when the sliding plate 15 moves and adjusts, it will drive the long strips 213 on both sides to rotate around the fixed rod 212. The rotation of the long strips 213 on both sides will drive the semicircular block 31 to move. The movement of the semicircular block 31 will exert a squeezing force on the arc-shaped clamping plate 301. When the semicircular block 31 squeezes the arc-shaped clamping plate 301, the arc-shaped clamping plate 301 will slide on the circular hollow plate 20 towards the second slide groove 302, while compressing the third spring 303. The third spring 303 will contract under pressure, so that the arc-shaped clamping plates 301 on both sides will gradually move towards the middle until they are in contact with the crossbar body 11. At this time, the arc-shaped clamping plate 301 clamps and fixes the crossbar body 11, increasing the force-bearing surface of the long strips 213 on both sides, thereby further enhancing the stability of the triangular assembly 21.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A formwork support for a large-span cantilever component of a building roof, characterized in that: The assembly includes a detachable component, comprising a main body (10) of uprights and a main body (11) of crossbars. A fixing ring plate (12) is fixedly connected to the outer surface of the main body (10). A semi-circular sliding plate (13) is slidably connected inside the fixing ring plate (12). A fixing component (14) is provided between the outer surface of the semi-circular sliding plate (13) and the outer surface of the fixing ring plate (12). The fixing component (14) is used to fix the semi-circular sliding plate (13). A sliding plate (15) is symmetrically slidably connected to the outer surface of the main body (10). A limiting component (16) is provided between the outer surface of the sliding plate (15) and the outer surface of the fixing ring plate (12). The limiting component (16) is used to limit the sliding plate (15). A plurality of evenly distributed square grooves (144) are opened on the outer surface of the semi-circular sliding plate (13). The stabilizing component includes a circular hollow plate (20) disposed outside the crossbar body (11), and a triangular assembly (21) is disposed between the outer surface of the circular hollow plate (20) and the outer surface of the sliding plate (15), the triangular assembly (21) being used to provide stable support for the crossbar body (11); The auxiliary components include a reinforcing assembly (30) disposed outside the circular hollow plate (20), the reinforcing assembly (30) being used to enhance the stability of the triangular assembly (21); The fixing component (14) includes a first slide groove (141) symmetrically opened on the outer surface of the fixing ring plate (12), and a trapezoidal plate (142) is slidably connected inside the first slide groove (141). The trapezoidal plate (142) has an inclined end face on the side away from the square groove (144). The limiting component (16) includes a fixed plate (161) fixedly connected to the outer surface of the sliding plate (15). The outer surface of the fixed plate (161) is provided with a plurality of evenly distributed limiting grooves (162). The outer surface of the fixed ring plate (12) is symmetrically fixedly connected with hollow groove plates (163). The interior of the hollow groove plate (163) is slidably connected to the outer surface of the fixed plate (161). The outer surface of the hollow groove plate (163) is provided with a through groove (164). The interior of the through groove (164) is connected to the interior of the limiting groove (162). The interior of the semi-circular sliding plate (13) is slidably connected to a T-shaped plate (17), and the outer surface of the T-shaped plate (17) is symmetrically fixedly connected to an extrusion plate (18). The end of the extrusion plate (18) away from the T-shaped plate (17) corresponds to the inclined end face of the trapezoidal plate (142), the end of the extrusion plate (18) away from the T-shaped plate (17) corresponds to the inside of the through groove (164), and the end of the extrusion plate (18) away from the T-shaped plate (17) corresponds to the inside of the limiting groove (162).

2. The formwork for a large-span cantilevered component of a building roof according to claim 1, characterized in that: A first spring (143) is fixedly connected to the outer surface of the trapezoidal plate (142). The end of the first spring (143) away from the trapezoidal plate (142) is fixedly connected to the inner side of the first groove (141). The interior of the square groove (144) corresponds to the outer surface of the trapezoidal plate (142).

3. The formwork for a large-span cantilevered component of a building roof according to claim 1, characterized in that: The interior of the semi-circular sliding plate (13) is fixedly connected to a second spring (19), and the end of the second spring (19) away from the semi-circular sliding plate (13) is fixedly connected to the outer surface of the T-shaped plate (17).

4. The formwork for a large-span cantilevered component of a building roof according to claim 1, characterized in that: The fixed ring plate (12) is a gap double ring plate, and the arc end of the semi-arc sliding plate (13) is located at the gap of the fixed ring plate (12).

5. The formwork for a large-span cantilevered component of a building roof according to claim 1, characterized in that: The triangular assembly (21) includes a fixing block (211) symmetrically fixedly connected to the outer surface of the circular hollow plate (20). A fixing rod (212) is fixedly connected to the outer surface of the fixing block (211). A long strip plate (213) is rotatably connected to the outer surface of the fixing rod (212). One end of the long strip plate (213) away from the circular hollow plate (20) is rotatably connected to the outer surface of the sliding plate (15).

6. The formwork for a large-span cantilevered component of a building roof according to claim 5, characterized in that: The reinforcing component (30) includes an arc-shaped clamp (301) symmetrically slidably connected to the outer surface of the circular hollow plate (20). The circular hollow plate (20) has a second sliding groove (302) symmetrically opened inside. A third spring (303) is fixedly connected inside the second sliding groove (302). One end of the third spring (303) away from the second sliding groove (302) is fixedly connected to the outer surface of the arc-shaped clamp (301).

7. The formwork for a large-span cantilevered component of a building roof according to claim 6, characterized in that: A semicircular block (31) is fixedly connected to one end of the long strip (213) near the circular hollow plate (20), and the outer surface of the semicircular block (31) is in contact with the top of the arc-shaped clamp (301).

Images