General fixture for metal roof

Abstract

The utility model relates to a kind of metal roof general fixture, its structure includes first, second part, two parts are attached and the attached part is opened with through-hole, respectively equipped with first, second support part and form clamping area, also equipped with mortise and tenon structure.Tightening part can lock two plate body;Different space can be formed between first, second support part to connect different lock edge, part support part is also equipped with limit block;Mortise and tenon structure has rectangle, spherical etc.;There is inclined rib between first plate body and first support part, and the surface of second plate body attachment has anti-skid line, also be equipped with screw hole for butt joint photovoltaic plate clamping piece;Two parts can form "π" shape structure.The fixture can adapt to different lock edge, enhance connection strength and stability, improve carrying capacity, ensure overall stability, facilitate photovoltaic plate installation maintenance, expand function, improve applicability in solar energy utilization field.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic clamping technology, and in particular to a universal clamping fixture for metal roofs. Background Technology

[0002] In the construction industry, metal roofing has been widely used due to its unique advantages, such as light weight, high strength, good durability, and convenient construction. With the continuous development of solar energy utilization technology, integrating photovoltaic modules into metal roofs to achieve building-photovoltaic power generation integration has become a highly promising energy utilization method. However, existing metal roofing clamps have revealed many problems in practical applications, severely limiting the further promotion and application of metal roofing in the field of solar energy utilization.

[0003] Existing metal roofing clamps are relatively limited in function and lack versatility. Different types of metal panel seams have different shapes and sizes; for example, common corner seams and standing seams have significantly different structural characteristics. However, existing clamps are often designed only for a specific type of seam and cannot adapt to the needs of various metal panel seam types. This results in the need for multiple clamps of different specifications to be used for different metal panel seam types in actual projects, which not only increases procurement costs and management complexity but also reduces construction efficiency.

[0004] Meanwhile, the existing clamps lack versatility and are difficult to integrate effectively with photovoltaic modules. Photovoltaic modules and their supports require stable and reliable structures, but existing clamps, due to their structural limitations, cannot provide sufficiently stable and secure support. When subjected to external environmental forces such as wind and snow pressure, the clamps are prone to loosening, deformation, or even damage, leading to unstable installation of the photovoltaic modules and affecting their normal power generation efficiency and safety. This not only increases the maintenance costs of the photovoltaic system but also shortens its lifespan, reducing the economic efficiency and reliability of the entire solar energy utilization system.

[0005] Furthermore, existing metal roofing clamps also have some shortcomings in their structural design. For example, the connection strength and stability between the various components of the clamps are insufficient, making them prone to loosening during long-term use; the lack of effective anti-slip and stress dispersion designs leads to stress concentration when the clamps are subjected to external forces, resulting in damage to the connection points. These problems further limit the application scenarios and scope of metal roofs in the field of solar energy utilization.

[0006] In summary, existing metal roofing clamps have many technical problems in terms of functional limitations, versatility, integration with photovoltaic modules, and structural design. There is an urgent need for a new type of universal metal roofing clamp to solve these problems, so as to expand the application of metal roofs in the field of solar energy utilization and improve their practicality and economy.

[0007] Therefore, we propose a universal clamp for metal roofing. Utility Model Content

[0008] Therefore, it is necessary to address the technical problems of existing metal roofing clamps, such as limited functionality, poor versatility, difficulty in adapting to different types of metal sheet edge locking, and inability to effectively integrate with photovoltaic modules, which restrict the application of metal roofs in the field of solar energy utilization. This would enable the clamp to reliably hold different types of metal sheets for edge locking, while providing stable support for photovoltaic modules, expanding the application scenarios of metal roofs in the field of solar energy utilization, and improving its practicality and versatility.

[0009] This utility model provides a universal clamp for metal roofing, comprising a first part having a first plate and a first support portion disposed on the lower end face of the first plate in the thickness direction; and a second part having a second plate and a second support portion disposed on the lower end face of the second plate in the thickness direction. The first plate and the second plate are partially fitted together, and corresponding through holes are provided at the fitted portion. The first and second support portions are disposed opposite to each other, and a clamping area is reserved between the first and second support portions. A tenon and mortise structure is provided between the two plates. This structure allows the clamp to adapt to the edge locking of metal plates of different shapes and sizes, such as corner edge locking and standing edge locking, through the clamping area formed by the first and second support portions. The tenon and mortise structure enhances the connection strength and stability between the two plates, preventing loosening during stress. Meanwhile, the partially fitted first and second plates and the corresponding through-hole design facilitate the subsequent installation of fasteners, ensuring the overall structural stability of the clamp and enabling it to withstand the weight of the photovoltaic modules and their supports as well as the forces of the external environment, such as wind and snow pressure, thus providing a reliable connection foundation for the integration of metal roofs and photovoltaic power generation.

[0010] In other embodiments, a fastening part is also included, which passes through through holes in the first and second plates and locks the first and second plates in place. The fastening part typically uses standard parts such as bolts and nuts. By tightening the nuts to a specified torque, a suitable preload is achieved between the two plates, thereby ensuring the clamping effect and structural stability of the fixture. This ensures stable operation of the fixture under various working conditions and extends its service life.

[0011] In other embodiments, metal plates are also included, arranged in a horizontal sequence, with locking seams formed at the joints of adjacent metal plates. These locking seams include corner locking seams and standing locking seams. As a major component of the roof, the material and performance of the metal plates directly affect the quality and service life of the roof. The locking seams connect adjacent metal plates to form a continuous roof structure, while also providing waterproofing and windproofing. The clamps are designed according to different locking seam types to reliably hold the seams, ensuring the overall performance and safety of the roof.

[0012] In other embodiments, a triangular or rhomboid space is formed between the first and second support portions for engaging single-corner or double-corner lock edges. This spatial structure better adapts to the shape of the corner lock edge, provides uniform clamping force, prevents deformation or slippage of the lock edge during clamping, ensures secure clamping of the corner lock edge, and meets the installation requirements of different corner lock edge metal roofs.

[0013] In other embodiments, a rectangular space is formed between the first support portion and the second support portion for engaging the standing seam, and a limiting block protruding towards the standing seam is provided on one of the support portions. The limiting block can further restrict the position of the standing seam, prevent it from shifting during clamping, improve clamping stability, and enable the clamp to better adapt to the installation of standing seam metal roofs, ensuring the stability of the roof under various environmental conditions.

[0014] In other embodiments, the mortise and tenon structure is located on the end face of the second plate near the first plate. The mortise and tenon structure includes a tenon on one of the plates and a mortise on the other plate. The tenon is rectangular or spherical, and the shape of the mortise corresponds to the shape of the tenon. The fit between the rectangular tenon and mortise provides a larger contact area, withstands greater shear force, improves horizontal strength, and achieves initial positioning. The fit between the spherical tenon and mortise has a certain degree of adaptability, allowing adjustment of the connection angle and position to adapt to different installation requirements. This provides better flexibility between the two plates, allowing for some rotation under horizontal and vertical forces, reducing the risk of damage, and enhancing the connection reliability and adaptability of the clamp.

[0015] In other embodiments, diagonal ribs are provided between the first plate and the first support portion. These ribs enhance the connection strength between the first plate and the first support portion, improving the overall rigidity of the structure. When the fixture is subjected to external forces, the ribs can share some of the force, reducing stress concentration at the connection between the first plate and the first support portion, preventing damage to the connection, improving the load-bearing capacity of the fixture, and ensuring its safe and reliable operation under complex working conditions.

[0016] In other embodiments, the surfaces of the first and second plates that are in contact with each other are provided with anti-slip textures. These textures increase the friction between the first and second plates, preventing relative sliding between them during clamping. When fasteners are installed, the anti-slip textures ensure a tighter fit between the two plates under preload, improving the overall stability of the clamp and ensuring a stable connection during long-term use, thus reducing clamping failure caused by plate slippage.

[0017] In other embodiments, the first plate is further provided with screw holes for connecting to photovoltaic panel connectors. The position and specifications of the screw holes are determined according to the design of the photovoltaic panel connectors. By providing screw holes, the clamp can achieve a reliable connection with the photovoltaic panel connectors, providing stable support for the installation of the photovoltaic panels. This not only facilitates the installation and maintenance of the photovoltaic panels but also ensures that the photovoltaic panels maintain a stable working state under various environmental conditions, expanding the functionality of the clamp and enabling it to be better integrated with photovoltaic systems, thus improving the applicability of the clamp in the field of solar energy utilization.

[0018] In other embodiments, the first part is a T-shaped structure, the second part is an L-shaped structure, and the first and second parts combine to form a "π"-shaped structure. The first part of the T-shaped structure provides a larger load-bearing area, which is beneficial for installing photovoltaic modules and their supports; the second part of the L-shaped structure can easily cooperate with the first part to form a stable clamping structure. The "π"-shaped clamp can better disperse stress when under force, improve the clamp's resistance to deformation, and enable the clamp to have good overall stability and strength while ensuring its clamping function. By comprehensively considering the functional requirements and structural performance of the clamp, the clamp can achieve the best results in metal roofing applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the (double-corner locking) clamp of this utility model.

[0020] Figure 2 This is a schematic diagram of the (vertical locking) clamp of this utility model.

[0021] Figure 3 This is a schematic diagram of another structure of the (standing locking edge) clamp of this utility model.

[0022] Figure 4 for Figure 3 A schematic diagram of the connection structure between the (standing locking) clamp and the metal plate.

[0023] Figure 5 for Figure 1 A schematic diagram of the connection structure between the (double-angle locking) clamp and the metal plate.

[0024] Figure 6 for Figure 2 A schematic diagram of the connection structure between the (standing locking) clamp and the metal plate.

[0025] in:

[0026] 10. First part; 100. First plate; 101. First through hole; 102. Mortise and tenon structure; 103. Diagonal rib; 110. First support part; 20. Second part; 200. Second plate; 201. Second through hole; 210. Second support part; 211. Limiting block; 30. Fastener; 40. Metal plate; 41. Locking edge. Detailed Implementation

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0028] like Figures 1-6 As shown, this embodiment discloses a universal metal roofing clamp, including a first part 10 and a second part 20. The two parts are combined to form a structure that can clamp the metal plate 40 and lock the edge 41. At the same time, the first plate 100 of the first part 10 has sufficient area to support the photovoltaic module and its bracket. This design enables the clamp to not only clamp the metal plate and lock the edge, but also provide a stable support platform for the photovoltaic module, expanding the application scenarios of the clamp and improving its practicality in the field of solar energy utilization.

[0029] The first part 10 comprises a first plate 100 and a first support portion 110 disposed on the lower end face of the first plate 100 in the thickness direction. The first plate 100, as the main load-bearing structure, needs to possess sufficient strength and rigidity to withstand the weight of the photovoltaic modules and their supports, as well as the forces exerted by the external environment, such as wind and snow pressure. Its material is typically a high-strength metal, such as stainless steel or aluminum alloy, manufactured through specific processing techniques, such as stamping and casting. The first support portion 110 serves a supporting and positioning function. Its connection to the first plate 100 must ensure a secure connection; common connection methods include welding and bolting. Welding allows the first support portion 110 to form a unified structure with the first plate 100, improving structural stability; bolting facilitates installation and disassembly, making maintenance or component replacement more convenient. The reasonable material selection and connection method ensure the structural reliability of the first part, laying the foundation for its application in metal roofing clamps, effectively guaranteeing the clamping effect of the clamp on the metal plate edge and the load-bearing capacity of the photovoltaic modules.

[0030] The second part 20 includes a second plate 200 and a second support portion 210 disposed on the lower end face of the second plate 200 in the thickness direction. The second plate 200 is partially attached to the first plate 100, and the attached portion has corresponding through holes. Here, the through hole on the first plate is the first through hole 101, and the through hole on the second plate is the second through hole 201. The second plate 200 also needs to have sufficient strength, and its material and processing technology can refer to the first plate 100. The second support portion 210 is disposed opposite to the first support portion 110, and a clamping area is reserved between the first support portion 110 and the second support portion 210 for clamping the locking edge of the metal plate. The shape and size of the second support portion 210 need to be designed according to the type of locking edge to ensure that it can fit tightly to the locking edge and provide a stable clamping force. The structural design of the second part cooperates with the first part to jointly constitute the clamping body of the fixture. Through reasonable structural design, it can adapt to the clamping requirements of different types of locking edges, improving the versatility of the fixture.

[0031] The first plate 100 and the second plate 200 are partially fitted together, and corresponding through holes, a first through hole 101 and a second through hole 201, are provided at the fitted portion. This fitting design ensures accurate alignment of the two plates during installation, guaranteeing the overall structural stability of the fixture. The through holes are for subsequent installation of fasteners 30, which securely connect the two plates together. The position and size of the through holes need to be designed according to the type and specifications of the fasteners to ensure that the fasteners can pass through smoothly and achieve a reliable connection. Accurate fitting and through hole design are key to ensuring the installation quality of the fixture, enabling the two plates to work together under stress and improving the overall performance of the fixture.

[0032] The first support portion 110 and the second support portion 210 are disposed opposite to each other, and a clamping area is reserved between the first support portion 110 and the second support portion 210. The size and shape of the clamping area need to be adjusted according to the specific dimensions and shape of the metal plate edge locking.

[0033] like Figure 1 As shown, for example, when clamping a single-corner or double-corner locking edge, a triangular or rhomboid space is formed between the first support portion 110 and the second support portion 210. Figure 1 The fixture shown is for fixing double-corner lock edges. When the lock edges 41 at both corners are clamped and fixed, the clamping area is rhomboid. When there is only one corner, the clamping area is triangular. This spatial structure can better adapt to the shape of the corner lock edge, provide uniform clamping force, and prevent the lock edge from deforming or sliding during the clamping process.

[0034] like Figure 2 and Figure 3As shown, when clamping an upright locking edge, a rectangular space is formed between the first support part 110 and the second support part 210, and a limiting block 211 protruding towards the upright locking edge is provided on one of the support parts. The function of the limiting block 211 is to further restrict the position of the upright locking edge, prevent it from shifting during clamping, and improve the stability of clamping. The rationally designed clamping area and limiting structure enable the fixture to adapt to different types of metal plate locking edges, greatly improving the versatility and practicality of the fixture, and reducing the cost and workload of changing different fixtures due to different locking edge types.

[0035] A tenon and mortise structure 102 is provided between the two plates. The tenon and mortise structure 102 is located on the end face of the second plate 200 near the first plate 100. The tenon and mortise structure 102 includes a tenon provided on one of the plates and a mortise provided on the other plate.

[0036] The tenon is rectangular or spherical in shape, and the shape of the mortise corresponds to the shape of the tenon.

[0037] like Figure 1 and Figure 2 As shown, all tenons are spherical. At this time, a spherical mortise is set on another board. In this type of design, the diameter of the tenon is larger than the opening distance of the mortise. It usually needs to be installed against the side wall of the locking edge 41. This spherical tenon can make the two boards more flexible. When subjected to horizontal and vertical forces, it has a certain amount of rotation, so it is not easy to be damaged.

[0038] like Figure 3 As shown, the tenon is rectangular, and the mortise is also a rectangular groove. This design allows for better installation, improves horizontal strength, and achieves initial positioning.

[0039] Mortise and tenon joints are a traditional connection method characterized by strong and stable connections. Using mortise and tenon joints in clamps enhances the connection strength between two plates, preventing loosening under stress. The fit between a rectangular tenon and mortise provides a large contact area, allowing it to withstand greater shear forces; the fit between a spherical tenon and mortise offers a degree of adaptability, allowing adjustment of the connection angle and position to suit different installation needs. The application of mortise and tenon joints not only improves the structural stability of clamps but also embodies the combination of traditional craftsmanship and modern design, providing strong guarantees for the reliability and durability of the clamps.

[0040] In this embodiment, a fastening part, here a fastener 30, is also included. The fastener 30 passes through the first through hole 101 and the second through hole 201 opened on the first plate 100 and the second plate 200, and locks and fixes the first plate 100 and the second plate 200. The fastener 30 is usually a standard part such as a bolt or nut, and its specifications and model need to be selected according to the stress condition and installation requirements of the fixture. During the installation process, the nut needs to be tightened according to the specified torque to ensure that the two plates reach a suitable preload, thereby ensuring the clamping effect and structural stability of the fixture. The correct installation of the fastener and the control of the preload are important links to ensure the performance of the fixture. It enables the fixture to maintain a stable working state under various working conditions and extends the service life of the fixture.

[0041] In this embodiment, metal plates 40 are also included. These metal plates 40 are arranged sequentially along a horizontal direction, and a locking edge 41 is formed at the connection point of adjacent metal plates 40. The locking edge 41 includes corner locking edges and standing locking edges. As a major component of the roof, the material and performance of the metal plates 40 directly affect the quality and service life of the roof. Common metal plate materials include galvanized steel plates and aluminum alloy plates, which have good corrosion resistance, strength, and durability. The function of the locking edge 41 is to connect adjacent metal plates together to form a continuous roof structure, while also providing waterproofing and windproofing. Corner locking edges and standing locking edges are two common locking edge forms, differing in structure and installation methods. The clamps need to be designed according to different locking edge forms to ensure reliable clamping of the locking edge metal plates. The reasonable design and installation of the locking edges are crucial to ensuring the overall performance of the roof. As an important component connecting the metal plates and photovoltaic modules, the quality of the clamp's fit with the locking edges directly affects the stability and safety of the roof.

[0042] In this embodiment, diagonal ribs 103 are provided between the first plate 100 and the first support portion 110. The function of the diagonal ribs 103 is to enhance the connection strength between the first plate 100 and the first support portion 110, thereby improving the overall rigidity of the structure. When the fixture is subjected to external forces, the diagonal ribs 103 can share part of the force, reduce stress concentration at the connection between the first plate 100 and the first support portion 110, and prevent damage to the connection. The shape, size, and quantity of the diagonal ribs 103 need to be optimized according to the stress conditions and structural design of the fixture to achieve the best strengthening effect. The setting of diagonal ribs is an important measure to improve the structural strength of the fixture. It can effectively improve the load-bearing capacity of the fixture and ensure the safe and reliable operation of the fixture under complex working conditions.

[0043] In this embodiment, the surfaces of the first plate 100 and the second plate 200 that are in contact are provided with anti-slip textures. The function of the anti-slip textures is to increase the friction between the first plate 100 and the second plate 200, preventing relative sliding between the two plates during the use of the clamp. The shape and density of the anti-slip textures can be designed according to actual needs; common anti-slip texture shapes include stripes, grids, etc. When installing the fastener 30, the anti-slip textures enable the two plates to fit more tightly under the preload, improving the overall stability of the clamp. Although the anti-slip texture is a small detail, it has a significant impact on the performance of the clamp. It ensures that the clamp maintains a stable connection during long-term use, reducing clamp failure caused by plate slippage.

[0044] In this embodiment, the first plate 100 is also provided with screw holes 105 for connecting to photovoltaic panel connectors. The position and specifications of the screw holes 105 need to be determined according to the design of the photovoltaic panel connectors to ensure that the photovoltaic panels can be accurately and firmly installed on the clamp. By providing screw holes 105, the clamp can achieve a reliable connection with the photovoltaic panel connectors, providing stable support for the installation of the photovoltaic panels. This not only facilitates the installation and maintenance of the photovoltaic panels, but also ensures that the photovoltaic panels can maintain a stable working state under various environmental conditions. The setting of screw holes expands the function of the clamp, enabling it to be better integrated with photovoltaic systems, improving the applicability of the clamp in the field of solar energy utilization, and providing convenient conditions for the combination of metal roofs and photovoltaic power generation.

[0045] In this embodiment, the first part 10 is a T-shaped structure, the second part 20 is an L-shaped structure, and the first part 10 and the second part 20 combine to form a "π"-shaped structure. This structural design allows the clamp to maintain its clamping function while possessing good overall stability and strength. The T-shaped first part 10 provides a larger load-bearing area, which is beneficial for installing photovoltaic modules and their supports; the L-shaped second part 20 easily cooperates with the first part 10 to form a stable clamping structure. The "π"-shaped clamp can better disperse stress when subjected to force, improving the clamp's resistance to deformation. This unique structural design is a major feature of the clamp, comprehensively considering the functional requirements and structural performance of the clamp, enabling it to achieve optimal results in metal roofing applications and providing a reliable solution for the construction and maintenance of metal roofs.

[0046] In summary, the universal metal roofing clamp of this embodiment, through reasonable structural design and component configuration, can reliably clamp different types of metal plates and provide stable support for photovoltaic modules, exhibiting high versatility, practicality, and reliability.

[0047] During installation, the metal plates 40 are first connected sequentially along the horizontal direction, forming a locking edge 41 at the joints of adjacent metal plates. Locking edge types include corner locking edges and upright locking edges. For example... Figure 4 and Figure 6 As shown, this is a standing seam, while Figure 5 Double corner overlocking was demonstrated;

[0048] Next, place the first part 10 and the second part 20 of the clamp on both sides of the locking edge 41, so that the first support part 110 and the second support part 210 are positioned opposite each other, leaving a clamping area to align with the locking edge.

[0049] Because the two panels are connected by a mortise and tenon joint 102, the tenons and mortises engage during installation, providing initial positioning and connection. This mortise and tenon connection ensures accurate relative positioning of the two panels during installation and provides sufficient connection strength to prevent displacement during subsequent installation.

[0050] After the first part 10 and the second part 20 are initially in place, fasteners 30 are used to pass through the first through hole 101 on the first plate 100 and the second through hole 201 on the second plate 200. By tightening the fasteners 30, the first plate 100 and the second plate 200 are gradually locked together. As the tightening force increases, the first support 110 and the second support 210 will tightly clamp the locking edge 41.

[0051] If the locking edge is a single-angle or double-angle locking edge, the triangular or rhomboid space formed between the first support 110 and the second support 210 can well adapt to the shape of the locking edge, uniformly apply clamping force, ensure that the locking edge is firmly clamped, and prevent it from sliding or deforming in the clamp. When the locking edge is an upright locking edge, the rectangular space formed between the first support 110 and the second support 210, as well as the limiting block 211 provided on one of the supports, will come into play. The limiting block 211 protrudes towards the upright locking edge, which can further restrict the position of the upright locking edge, making it unable to move within the clamping area, thereby ensuring the stability of the clamping.

[0052] The diagonal ribs 103 provided between the first plate 100 and the first support 110 can share some of the force when the fixture is subjected to external forces, reducing stress concentration at the connection and enhancing the overall rigidity and stability of the structure. At the same time, the anti-slip texture on the contact surface of the first plate 100 and the second plate 200 increases the friction between the two plates, preventing relative sliding of the plates due to external forces during the use of the fixture, thus ensuring the integrity of the fixture.

[0053] When photovoltaic modules need to be installed on a metal roof, the photovoltaic panel connectors are connected to the clamps using the screw holes 105 provided on the first plate 100. The photovoltaic panel connectors are then securely installed in the screw holes 105 using bolts or other connectors, thus connecting the photovoltaic panel to the clamps. The "π"-shaped structure of the clamps, combining the T-shaped structure of the first part 10 and the L-shaped structure of the second part 20, provides a stable support platform for the photovoltaic modules, capable of withstanding the weight of the photovoltaic modules and their supports, as well as the forces exerted by the external environment, such as wind and snow pressure.

[0054] Overall, this universal metal roofing clamp, through the coordinated work of its components, achieves reliable clamping of different types of metal panels and provides a stable foundation for the installation of photovoltaic modules, thus meeting the application requirements of combining metal roofing with photovoltaic power generation.

[0055] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A universal clamp for metal roofing, characterized in that, include: The first part has a first plate and a first support portion disposed on the lower end face of the first plate in the thickness direction; The second part has a second plate and a second support portion disposed on the lower end face of the second plate in the thickness direction; The first plate and the second plate are partially bonded together, and the bonding area is provided with corresponding through holes. The first support portion and the second support portion are arranged opposite to each other, and a clamping area is reserved between the first support portion and the second support portion; The two plates are provided with a mortise and tenon structure that fits together.

2. The universal clamp for metal roofing as described in claim 1, characterized in that: It also includes a fastening part that passes through through holes in the first plate and the second plate and locks and fixes the first plate and the second plate.

3. The universal clamp for metal roofing as described in claim 1, characterized in that: It also includes metal plates, which are connected sequentially in a horizontal direction, and a locking edge is formed at the connection between two adjacent metal plates. The locking edge includes corner locking edges and vertical locking edges.

4. A universal clamp for metal roofing as described in claim 2, characterized in that: The first support part and the second support part form a triangular space or a rhombus space, which is used to snap on a single-corner lock edge or a double-corner lock edge.

5. A universal clamp for metal roofing as described in claim 2, characterized in that: A rectangular space is formed between the first support part and the second support part for engaging the upright locking edge, and a limiting block protruding towards the upright locking edge is provided on one of the support parts.

6. A universal clamp for metal roofing as described in claim 1, characterized in that: The mortise and tenon structure is located on the end face of the second plate near the first plate. The mortise and tenon structure includes a tenon provided on one of the plates and a mortise provided on the other plate. The tenon is rectangular or spherical in shape, and the shape of the mortise corresponds to the shape of the tenon.

7. A universal clamp for metal roofing as described in claim 1, characterized in that: The first plate and the first support part are provided with interconnected diagonal ribs.

8. A universal clamp for metal roofing as described in claim 1, characterized in that: The side of the first plate that is in contact with the second plate has anti-slip texture.

9. A universal clamp for metal roofing as described in claim 1, characterized in that: The first plate is also provided with screw holes for connecting photovoltaic panel connectors.

10. A universal clamp for metal roofing as described in claim 1, characterized in that: The first part is a T-shaped structure, the second part is an L-shaped structure, and the first part and the second part are combined to form a "π"-shaped structure.

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