Rapidly assembled prefabricated building and stair structure thereof

Abstract

The present invention provides a rapidly assembled prefabricated building and a stair structure thereof, with a view to solving the problems of poor connection stress performance, weak seismic resistance, high production and manufacturing costs, high manufacturing difficulty, low construction efficiency, etc., in traditional prefabricated stair structures. The prefabricated stair structure comprises a stair section member and a support system, wherein the stair section member has at least one stair section, and the support system is provided with first and second locking portions adapted to upper and lower ends of the stair section. The locking portions enable stable connection between the stair section and the support system by means of acute-angle and obtuse-angle locking spaces and corresponding locking units. In addition, male corner reinforcing members may be arranged at ends of the stair section, and female corner reinforcing members may be arranged in the locking spaces, so as to enhance the structural strength. The design simplifies the construction process, improves the structural stability and seismic performance, reduces the manufacturing difficulty and costs, and is suitable for various buildings.

Description

Prefabricated buildings and their stair structures that require rapid assembly Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to a prefabricated building and its staircase structure that allows for rapid assembly. The invention aims to provide a prefabricated staircase solution that is novel in structure, robust in connection, has good seismic performance, low in manufacturing cost, easy to manufacture, and highly efficient in construction, in order to meet the demands of modern architecture for efficiency, economy, and safety. Background Technology

[0002] With the rapid development of the construction industry, prefabricated buildings have gradually gained widespread attention due to their advantages such as high factory production efficiency, stable quality, and fast on-site construction speed. Staircases, as the main traffic building component connecting upper and lower floors, play a crucial role in prefabricated buildings. However, existing prefabricated staircase structures still have many shortcomings in design, manufacturing, and construction.

[0003] Traditional prefabricated staircase structures primarily employ integrated or segmented prefabrication connected by bolts. While integrated prefabrication offers good overall integrity, it is difficult to manufacture, costly, and requires stringent transportation and installation conditions. The integrated connection between stair flights and landings, in particular, not only increases manufacturing complexity but also significantly raises prefabrication costs. On the other hand, segmented prefabrication connected by bolts, while more flexible, suffers from poor connection strength and seismic performance. Bolted connections rely mainly on the friction of the concrete surface to transfer force, making them prone to slippage under stress, resulting in insufficient stability at the connection points. Furthermore, bolted connections require drilling holes in the stair flights and support systems, increasing manufacturing difficulty, affecting the overall aesthetics of the staircase, and requiring the sealing of bolt holes during installation, further complicating construction. To overcome these shortcomings, the industry has been exploring more efficient and reliable prefabricated staircase structures. Some new prefabricated staircase structures employ more advanced connection methods, such as welding and mechanical locking, but these methods still present some challenges. While welded connections offer high strength, they are difficult to construct and require highly skilled welders. Furthermore, the stress and deformation generated during welding can affect the overall performance of the staircase. Mechanical locking connections, though convenient and quick, still require further verification of the reliability and durability of the locking components and may not meet high seismic performance requirements in certain situations. Therefore, addressing the shortcomings of existing technologies, this invention proposes a rapidly assembled prefabricated staircase structure, aiming to solve the problems of poor connection stress, poor seismic performance, high manufacturing costs, high manufacturing difficulty, and low construction efficiency in traditional prefabricated staircase structures. By optimizing the connection method between stair sections and supporting components, structural strength and safety are improved, manufacturing difficulty and cost are reduced, and construction efficiency is increased, thereby promoting the further development of the prefabricated building field. Summary of the Invention

[0004] This invention application provides a prefabricated building and its stair structure that can be assembled quickly, in order to solve the problems of poor connection stress, poor seismic performance, high production and manufacturing costs, high manufacturing difficulty and low construction efficiency of traditional prefabricated stair structures.

[0005] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0006] A prefabricated staircase structure includes a stair flight component and a support system. The stair flight component has at least one stair flight, and the support system has a first locking part adapted to assemble with the lower end of the stair flight and a second locking part adapted to assemble with the upper end of the stair flight. The first locking part includes at least one first locking space with an acute angle and a first locking unit adapted to hold the lower end of the stair flight within the first locking space; the second locking part includes at least one second locking space with an obtuse angle and a second locking unit adapted to hold the upper end of the stair flight within the second locking space. This combined design fully utilizes the high tensile strength of the first and second locking units, effectively avoiding the problem of poor shear resistance, and significantly improving the structural strength and safety of the staircase. Further, the stair flight component may include a first stair flight, and the support system includes a support member A and a support member B. The lower end of the first stair flight is locked to the first locking part disposed on support member A, and the upper end of the first stair flight is locked to the second locking part disposed on support member B. This design makes the connection between the stair flight and the support system more stable and reliable. Furthermore, the stair component may also include a second stair section, the lower end of which is locked in place by a first locking part configured on the B support. This modular design facilitates the prefabrication and installation of the staircase, improving construction efficiency. In particular, the B support, equipped with the first and second locking parts, can be constructed as a stair platform, which not only saves material costs but also improves the overall stability and safety of the staircase.

[0007] The design of the first and second locking spaces also fully considers the installation requirements of the stair section. The first locking space includes a first reference locking surface and a first inclined locking surface that slopes upwards from the first reference locking surface. The lower end of the stair section is at least partially embedded in the first locking space. The second locking space includes a second reference locking surface and a second inclined locking surface that slopes downwards from the second reference locking surface. The upper end of the stair section is at least partially embedded in the second locking space. This design allows the stair section to be more securely fixed to the support system during installation. To improve the structural strength of the stair section, at least one end of the stair section can be equipped with an external corner reinforcement, and internal corner reinforcements can be installed in the first and / or second locking spaces, with the external and internal corner reinforcements being compatible. This design can effectively enhance the structural strength of the stair section ends and increase its seismic performance.

[0008] The opening of the first locking space is inclined upwards, and the opening of the second locking space is inclined downwards. This design facilitates the installation and disassembly of the stair section and improves construction efficiency. Furthermore, the first locking unit is configured as either a male or female connector, and the second locking unit is also configured as either a male or female connector. The male connector is disposed on one of the stair section components and the support system, and the female connector is disposed on the other. The male connector has a locking rod capable of elastic extension and retraction, and the female connector is configured to prevent separation when the locking rod is inserted into the female connector. This design makes the connection between the stair section and the support system more robust and reliable, effectively improving the overall stability of the staircase. This application also provides a prefabricated building that can be assembled quickly using the aforementioned prefabricated staircase structure. This prefabricated building has advantages such as high structural strength, good seismic performance, low manufacturing cost, low manufacturing difficulty, and high construction efficiency, making it very suitable for the needs of modern architecture.

[0009] The technical effects of this invention are mainly reflected in the following aspects:

[0010] First, the design of prefabricated staircase structures significantly simplifies the construction process. With prefabricated stair components and support systems, only simple assembly work is required on-site, eliminating the need for complex on-site processing and pouring. This not only shortens the construction cycle but also reduces noise and dust pollution during construction. The standardized production of prefabricated components also ensures consistent quality of the stair components, improving the stability and durability of the overall structure.

[0011] Secondly, the unique locking mechanism design is another major highlight of this staircase structure. The first and second locking sections employ acute and obtuse angle locking spaces respectively, coupled with a flexible, telescopic locking rod and a female connector that restricts separation, ensuring a tight connection between the staircase and the support system. This design not only improves the stability of the connection but also maintains structural stability over long-term use, effectively preventing safety hazards caused by loosening or detachment. Simultaneously, the synergistic effect of the external and internal corner reinforcements further enhances the overall strength and stability of the staircase.

[0012] It's also worth mentioning that the design of the angled opening in the locking space is primarily to facilitate the assembly and disassembly of the stair components and support system. This design makes the assembly process smoother, reducing the difficulty and complexity of installation, and also facilitates disassembly when needed, improving the maintainability of the structure. In practical applications, this prefabricated stair structure has wide applicability. Whether in residential, commercial, or public facilities, suitable stair components and support systems can be selected for assembly as needed. Especially in emergencies, such as fires or earthquakes, this stair structure can maintain structural stability and provide a safe passage for evacuation.

[0013] In summary, the prefabricated staircase structure proposed in this invention demonstrates excellent performance in terms of ease of assembly, structural stability, practicality, and safety. Its unique design and innovative concept not only improve construction efficiency and quality but also provide users with a safer and more comfortable experience. Attached Figure Description

[0014] Figure 1 is a structural schematic diagram of the stair section component in Embodiment 1. Figure 2 is a cross-sectional view of the stair section component in Figure 1. Figures 2a and 2b are enlarged views of points A and B in Figure 2, respectively. Figure 3 is a structural schematic diagram of the support system in Embodiment 1. Figures 3a and 3b are cross-sectional views of points EE and FF in Figure 3, respectively. Figure 4 is a schematic diagram of the assembly state of the stair section component and support system in Embodiment 1. Figures 4a and 4b are schematic diagrams of the assembly structure at points C and D in Figure 4, respectively. Figures 4c and 4d are schematic diagrams of another implementation of the assembly structure in Figures 4a and 4b, respectively. Figure 5 is a structural schematic diagram of the first locking unit and the second locking unit in Embodiment 1. Figure 6 is a schematic diagram of one assembly state in Embodiment 2. Figure 7 is a schematic diagram of another assembly state in Embodiment 2.

[0015] Explanation of reference numerals in the attached drawings: 100, stair flight component; 100A, first stair flight; 100B, second stair flight; 100C, third stair flight; 200, support system; 200A, A support member; 200B, B support member; 200C, C support member. Support member; 210, First locking part; 211, First locking space; 211a, First reference locking surface; 211b, First inclined locking surface; 212, First locking unit; 220, Second locking part; 221, Second locking space; 221a, Second reference locking surface; 221b, Second inclined locking surface; 222, Second locking unit; 31, Male connector; 31a, Lower male connector; 31b, Upper male connector; 310, Locking rod; 311, Male connector shell; 312, First elastic element; 32, Female connector; 320, Female connector shell; 321, Conical locking clip; 322, Outer conical surface; 323, Power spring; 324, Inner conical surface; 41, First internal corner reinforcement; 42, First external corner reinforcement; 43, Second internal corner reinforcement; 44, Second external corner reinforcement. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0018] Example 1

[0019] Staircases, as connecting passageways between vertical spaces in a building, occupy a very important position in architecture. A staircase typically consists of stair flight components 100 and a support system 200 for supporting the stair flight components 100. Each stair flight component 100 includes at least one stair flight. In the assembled state, the lower end of the stair flight connects to the floor or platform structure of the first floor, and the upper end connects to the floor of the next higher floor or a stair platform located in the middle of the floor, forming a vertically connected staircase passage. In practice, the combination of stair flight components 100 and support system 200 can be designed according to the number of floors or staircase structure of the building, thereby completing the construction of the staircase for the entire building.

[0020] Referring to Figures 1-5, a prefabricated staircase structure in this embodiment includes a staircase component 100 and a support system 200. The staircase component 100 has at least one staircase segment. Specifically, in this embodiment, the staircase component 100 includes a first staircase segment 100A, as shown in Figure 4. The support system 200 has a first locking part 210 adapted to be assembled with the lower end of the staircase segment and a second locking part 220 adapted to be assembled with the upper end of the staircase segment. The first locking part 210 includes at least one first locking space 211 with an acute angle and a first locking unit 212 adapted to hold the lower end of the staircase segment within the first locking space 211. The first locking unit 212 and the first locking space 211 cooperate to fix the lower end of the first staircase segment 100A in the horizontal and vertical directions, making it stably connected. The second locking part 220 includes at least one second locking space 221 with an obtuse angle, and a second locking unit 222 adapted to hold the upper end of the stair section within the second locking space 221. The second locking unit 222 and the second locking space 221 cooperate to fix the upper end of the first stair section 100A in the horizontal and vertical directions.

[0021] The lower end of the stair section member 100 can be connected to the ground, stair landing, or floor slab, and the upper end of the stair section member 100 can be connected to the stair landing or floor slab. In this example, the lower end of the stair section member 100 is connected to support member A 200A, and its upper end is connected to support member B 200B. Support member A 200A and support member B 200B can be part or integral to the ground, stair landing, or floor slab. Specifically, as shown in Figure 4, the lower end of the first stair section 100A is locked and assembled with the first locking part 210 of support member A 200A, and the upper end of the first stair section 100A is locked and assembled with the second locking part 220 of support member B 200B.

[0022] The design of the first locking space 211 and the second locking space 221 needs to fully consider the requirements for stable and convenient installation of the stair section. Specifically, the first locking space 211 includes a first reference locking surface 211a and a first inclined locking surface 211b that is inclined upwards from the first reference locking surface 211a. The lower end of the stair section is at least partially embedded in the first locking space 211. In this embodiment, it is partially embedded, but in other embodiments, it can be fully embedded. The included angle formed between the first reference locking surface 211a and the first inclined locking surface 211b is an acute angle, that is, the included angle is less than 90°. The second locking space 221 includes a second reference locking surface 221a and a second inclined locking surface 221b that is inclined downwards from the second reference locking surface 221a. The upper end of the stair section is at least partially embedded in the second locking space 221. In this embodiment, it is partially embedded, but in other embodiments, it can be fully embedded. The angle formed between the second reference locking surface 221a and the second inclined locking surface 221b is an obtuse angle, that is, the angle between the two is greater than 90°. This design allows the stair section component 100 to be more securely fixed to the support system 200 during installation.

[0023] As shown in Figure 3a, in the first locking part 210, the first reference locking surface 211a and the first inclined locking surface 211b form a first locking space 211 in the shape of an "upward-sloping L". This "upward-sloping L" shaped locking space fits precisely with the lower end of the stair section. During installation, the lower end of the first stair section 100A is first assembled with the first locking part 210. This "upward-sloping L" structure has an installation positioning function, and the first stair section 100A can always be stably embedded in it under its own weight, without displacement after assembly. When subjected to external vibration or impact, the first stair section 100A can automatically reset along the inclined surface of the L, enhancing the stability of the structure.

[0024] As shown in Figure 3b, the second reference locking surface 221a and the second inclined locking surface 221b form a second locking space 221 in the shape of a "downward-sloping L". This "downward-sloping L" shaped locking space overlaps precisely with the upper end of the first stair section 100A. After the upper end of the first stair section 100A is installed, the first stair section 100A is inclined, converting the downward pressure of the upper end of the first stair section 100A into a horizontal thrust. This horizontal thrust is then offset by beams, walls, and other structures. Under the tension of the first locking unit 212 and the second locking unit 222, this horizontal thrust fully utilizes its high tensile strength, effectively avoiding the problem of poor shear resistance and improving the structural strength and safety of the staircase. Furthermore, as shown in Figure 3a, the opening of the first locking space 211 is inclined upward. As shown in Figure 3b, the opening of the second locking space 221 is inclined downward. The design of the inclined opening of the locking space is mainly to facilitate the assembly and disassembly process between the stair section component 100 and the support system 200. This design makes the assembly process smoother, reduces the difficulty and complexity of installation, and also facilitates disassembly when needed, improving the maintainability of the structure.

[0025] As an improvement, as shown in Figures 4c and 4d, to increase the connection strength between the stair section member 100 and the support system 200 and improve its seismic performance, a first internal corner reinforcement 41 is embedded in the intersection area of ​​the first reference locking surface 211a and the first inclined locking surface 211b, and the lower end of the first stair section 100A has a first external corner reinforcement 42 that is compatible with the first internal corner reinforcement 41. Furthermore, more preferably, a second internal corner reinforcement 43 is embedded in the intersection area of ​​the second reference locking surface 221a and the second inclined locking surface 221b, and the upper end of the first stair section 100A has a second external corner reinforcement 44 that is compatible with the second internal corner reinforcement 43.

[0026] In this technical solution: a first internal corner reinforcement 41 is added in the "upward sloping L" shaped junction area formed by the first locking space 211, and a first external corner reinforcement 42 adapted to it is added at the corner of the lower end of the ladder segment component 100. The first external corner reinforcement 42 can prevent the lower end of the ladder segment component 100 from being bumped during transportation and can also improve the assembly accuracy and structural strength. The first internal corner reinforcement 41 is preferably configured as an acute-angled steel plate that can fit with the first locking space 211, or it can be made of two steel plates spliced ​​together.

[0027] Similarly, a second internal corner reinforcement 43 is disposed in the intersection area of ​​the second reference locking surface 221a and the second inclined locking surface 221b, and a second external corner reinforcement 44 is disposed at the corner of the upper end of the stair section member 100. The second internal corner reinforcement 43 is preferably configured as an obtuse-angled steel plate that can fit into the two second locking spaces 221, or it can be composed of two steel plates joined together. Preferably, the aforementioned internal and external corner reinforcements are embedded and fixed to the locking spaces. In another alternative, the internal and external corner reinforcements can also be fixed to the locking spaces using fasteners, welding, or other methods. In this embodiment, both internal and external corner reinforcements are provided; in other embodiments, only one may be provided. To further improve the bonding strength between the stair section member 100 and the support system 200, this embodiment further optimizes the end corners of the stair section member 100 and the included angle of the locking spaces. For example, when the lower end of the ladder segment component 100 is prefabricated, the corner of its lower end can be chamfered or rounded. At the same time, the top of the included angle of the first locking space 211, that is, the intersection area of ​​the first reference locking surface 211a and the first inclined locking surface 211b, can be configured to be chamfered or rounded to fit and assemble with the lower end of the ladder segment component 100.

[0028] When a chamfer is provided at the corner of the lower end of the stair section component 100, the direction of the chamfer can be horizontal or inclined at a certain angle. In order to enable it to be well assembled with the support system 200, the inclination angle of the chamfer provided in the intersection area of ​​the first reference locking surface 211a and the first inclined locking surface 211b needs to be consistent with it. Providing a chamfer or rounded corner can not only improve the assembly accuracy and reduce the prefabrication difficulty, but also prevent the lower end of the stair section component 100 from being damaged by bumps during transportation. As shown in Figures 4-5, the specific implementation structure of the first locking unit 212 and the second locking unit 222 provided in this embodiment is as follows:

[0029] The first locking unit 212 is configured as a male connector 31 or a female connector 32, and the lower end of the first stair section 100A has a female connector 32 or a male connector 31 adapted to the first locking unit 212. The second locking unit 222 is configured as a male connector 31 or a female connector 32, and the upper end of the first stair section 100A has a female connector 32 or a male connector 31 adapted to the second locking unit 222. The male connector 31 has a locking rod 310, and the female connector 32 is configured to prevent separation of the locking rod 310 when it is inserted into the female connector 32. Specifically, as shown in FIG2, the lower end of the first stair section 100A is provided with a lower male connector 31a, and the upper end is provided with an upper male connector 31b.

[0030] As a further preferred embodiment, the male connector 31 includes a male connector housing 311, a locking rod 310 retractably embedded in the male connector housing 311, the locking rod 310 being provided with external countersunk teeth; and a first elastic member 312 housed within the male connector housing 311, the first elastic member 312 pressing against and applying force to the enlarged tail end of the locking rod 310, so that the other end of the locking rod 310 can extend along the extending direction of the male connector housing 311.

[0031] Alternatively, based on the above scheme, when prefabricated building components are installed sequentially, to save costs, the locking rod 310 can omit its telescopic function, reducing the length of the male connector shell 311 and saving material costs. The locking rod 310 extends out from the male connector shell 311 to meet the connection requirements. The female connector 32 includes a female connector shell 320; a conical locking clip 321 housed in the female connector shell 320, the conical locking clip 321 having internal countersunk teeth, and a power spring 323 providing continuous forward thrust to the conical locking clip 321. The female connector 320 has an inner conical surface 324 on its inner side, and an outer conical surface 322 on the outer side of the conical locking clip 321. The inner conical surface 324 and the outer conical surface 322 exert mutual pressure, allowing the inner teeth of the conical locking clip 321 to grip the corresponding outer teeth of the locking rod 310. The locking rod 310 can be easily inserted and cannot be pulled out; the greater the pulling force, the tighter the grip. The male connector 31 is selectively embedded in either the first stair section 100A or the support system 200, while the female connector 32 is embedded in the other.

[0032] In this embodiment: the first elastic element 312 can be a spring, which is always in a compressed state, and one end of the spring presses against the enlarged end of the locking rod 310 to ensure that the locking rod 310 always extends out of the male connector 311. When assembling the first stair section 100A, the locking rod 310 is compressed into the male connector 311, and then the first stair section 100A is installed into the first locking part 210. After installation, the locking rod 310 is pushed out by the first elastic element 312 and inserted into the female connector 32 to achieve mechanical connection.

[0033] To achieve maximum tensile strength of the first locking unit 212 and the second locking unit 222, and to withstand internal stresses, the principle of unidirectional locking between the male connector 31 and the female connector 32 is as follows:

[0034] The outer surface of the extended end of the locking rod 310 is provided with external teeth, and at the same time, the inner wall of the tapered locking clip 321 is provided with internal teeth to increase the friction when the two are in contact, thereby improving the tensile performance and structural strength of the locking unit.

[0035] When the male connector 31 and the female connector 32 are connected, one end of the locking rod 310 is inserted into the female connector housing 320 and presses the conical locking clip 321. After being subjected to force, the conical locking clip 321 presses the power spring 323 downward (or backward) and pushes the conical locking clip 321 outward (the conical locking clip 321 is ring-shaped. To improve the locking performance of the conical locking clip 321, it is preferable to have three clips that interlock with each other to form a ring shape). When the connecting end of the locking rod 310 is fully inserted into the conical locking clip 321, the outer teeth of the locking rod 310 and the inner teeth of the conical locking clip 321 engage. When subjected to tension, the outer conical surface 322 of the conical locking clip 321 and the inner conical surface 324 of the inner side of the female housing 320 undergo inclined plane transmission, forming a compression locking effect that tightens as it is pulled, thus locking the locking rod 310.

[0036] The first locking unit 212 and the second locking unit 222 are mechanical connection structures. The preferred embodiment can be found in the patent "A toothed extrusion type anti-return rebar connector" published under the authorized announcement number CN216305149U.

[0037] During assembly, the lower end of the first stair section 100A is first assembled with the first locking part 210 of the support member A 200A, and the elastically retractable male connector 31 is inserted into the corresponding female connector 32. The female connector 32 locks the male connector, thereby preventing the first stair section 100A from separating from the support member A 200A in the vertical direction. Because the opening of the first locking space 211 is tilted upwards, this design makes the assembly process smoother. When the locking rod 310 is fully inserted into the female connector 32, its outer teeth engage with the inner teeth of the conical locking clip 321, achieving a secure connection. Next, the upper end of the first stair section 100A is assembled with the second locking part 220 of the support member B 200B, and a similar insertion and locking operation is performed. Because the opening of the second locking space 221 is tilted downwards, this design also facilitates the assembly process.

[0038] Through the assembly process described above, the first stair section 100A is securely fixed between support member A 200A and support member B 200B, forming a vertically connected staircase passage. This prefabricated staircase structure not only has efficient assembly and disassembly capabilities but also excellent structural strength and seismic performance.

[0039] Example 2:

[0040] Referring to Figures 6 and 7, the connection structures of the stair section component 100 and the support system 200 used in this embodiment are basically the same. The difference is that this embodiment focuses on describing the assembly structure and method for multi-story staircases, as detailed below:

[0041] First, as shown in Figure 7, the stair component 100 has three stair sections: a first stair section 100A, a second stair section 100B, and a third stair section 100C. The support system 200 includes support member A 200A, support member B 200B, and support member C 200C. The first stair section 100A is erected between support member A 200A and support member B 200B; the second stair section 100B is erected between support member B 200B and support member C 200C; and the third stair section 100C is erected between support member C 200C and another upper support member (not labeled in the figure).

[0042] Referring to Figures 6 and 7, support member A 200A is located at the bottom and can be fixed to the base plate in subsequent processes. Support member A 200A is equipped with at least a first locking part 210, which is used to support and lock the lower end of the first stair section 100A. Support member B 200B is located in the middle of the floor, forming a stair platform. Support member B 200B is equipped with both a first locking part 210 and a second locking part 220. The first locking part 210 and the second locking part 220 are arranged side by side, with the second locking part 220 located on the outside of the stair platform to support and lock the upper end of the first stair section 100A. The first locking part 210 is located on the inside of the stair platform to support and lock the lower end of the second stair section 100B. It should be noted that the specific structure of the first locking part 210 and the second locking part 220 here is the same as that in Embodiment 1. Furthermore, the stair component 100 also includes a third stair section 100C, and the support system 200 also includes a C support member 200C, wherein the C support member 200C forms another stair platform. The C support member 200C and the B support member 200B have basically the same structure, and are equipped with a first locking part 210 and a second locking part 220. The first locking part 210 and the second locking part 220 are arranged side by side, and the second locking part 220 is located on the inner side of the stair platform to support and lock the upper end of the second stair section 100B. The first locking part 210 is located on the outer side of the stair platform to support and lock the lower end of the third stair section 100C.

[0043] Furthermore, in order to simplify the structural design of the stair section component 100 and the support system 200, reduce costs, and facilitate on-site assembly, all stair sections in this embodiment have the same structure, and all support components have the same structure. Both the stair section component 100 and the support system 200 are modularly designed, which greatly reduces structural costs and design difficulty, and significantly improves on-site assembly efficiency.

[0044] The assembly method of the above-mentioned multi-story staircase structure is as follows:

[0045] Step 1: Assemble the stair platform; use hoisting equipment to sequentially fix and assemble support component A 200A, support component B 200B, and support component C 200C to the wall or vertical wall.

[0046] Step 2: Assemble the first stair section 100A; assemble the lower end of the first stair section 100A onto the first locking part 210 in support member A 200A, thereby fixing the lower end of the first stair section 100A to the first locking part 210. Assemble the upper end of the first stair section 100A onto the second locking part 220 in support member B 200B, thereby fixing it to the second locking part 220 of support member B 200B.

[0047] Step 3: Assemble the second stair section 100B. Assemble the lower end of the second stair section 100B onto the first locking part 210 inside the B support member 200B, thus fixing it to the first locking part 210 of the B support member 200B. Assemble the upper end of the second stair section 100B onto the second locking part 220 in the C support member 200C, thus fixing it to the second locking part 220 of the C support member 200C.

[0048] Step 4: Assemble the third stair section 100C. Assemble the lower end of the third stair section 100C onto the first locking part 210 in the C support member 200C, thus fixing it to the first locking part 210 of the C support member 200C; finally, assemble the upper end of the third stair section 100C onto the second locking part 220 of another support member (stair platform four) (stair platform four, like the B support member 200B, is pre-assembled on the vertical wall or wall, and it also has a first locking part 210 and a second locking part 220, but is not shown in the figure), thus completing the construction of the stair structure.

[0049] It is worth noting that, taking support member B 200B as an example, it is simultaneously equipped with a downward-extending first stair section 100A and an upward-extending second stair section 100B. The second locking part 220 connecting the upper end of the first stair section 100A and the first locking part 210 connecting the lower end of the second stair section 100B can be located on the same side of the horizontal plane of the stair platform, or on different sides. Furthermore, this arrangement can be adopted for stair platforms added upwards in this manner, as well as the N supports contained therein. Alternatively, the hoisting equipment can first hoist support member A 200A and support member B 200B into place, and then hoist the first stair section 100A; after the first stair section 100A is installed, support member C 200C is hoisted, and then the second stair section 100B is hoisted, and so on, assembling the entire building's staircase in this sequence. For the stair section located at the top or bottom of the entire stair structure, the supporting components assembled with that stair section will also be located at the top or bottom of the entire stair structure.

[0050] Firstly, as shown in Figure 6, when the first stair section 100A is at the lowest point of the stair structure, the A-support member 200A assembled with the lower end of the stair section should also be at the lowest point of the building structure. In this case, the support member can have only the first locking part 210, or it can have the second locking part 220 simultaneously. However, if the support member also has the second locking part 220, then the second locking part 220 in the support member is left unused.

[0051] Secondly, when this stair section is at the top of the stair structure, the B support member 200B assembled with the upper end of this stair section should also be at the top of the building structure. In this case, the support member can be equipped with only the second locking part 220, or it can be equipped with the first locking part 210 at the same time. However, when the support member is also equipped with the first locking part 210, the first locking part 210 in the support member is left unused.

[0052] Based on the two assembly scenarios described above, to ensure the flatness and aesthetics of the stair platform after the stair structure assembly is completed, it is necessary to fill the empty first locking part 210 and second locking part 220 in the stair platform with material. Typically, to expedite the actual construction process, production personnel will prefabricate the stair platforms located at the top and bottom of the stair structure separately, ensuring that each stair platform has only a single locking part, thus avoiding the problem of empty locking parts. Furthermore, since the direction of the staircase in a building structure is often determined according to the building's internal design, the relative positions of the first locking part 210 and second locking part 220 in a single stair platform must be determined during prefabrication based on actual construction requirements. In this application, the positions of these two parts are not limited to the scenario described in this embodiment; whether they are arranged side-by-side, staggered, or at a certain angle is not qualitatively required and is also considered to fall within the scope of protection of this application.

[0053] In actual manufacturing and construction, the first locking unit 212 and the second locking unit 222 can effectively prevent the stair section component 100 from detaching or shifting from the support system 200 after assembly. They also create internal connection stress after assembly, increasing the building's safety. The first locking unit 212 and the second locking unit 222 can be mechanical connectors or other locking-function connecting components pre-embedded in the ends of the stair section component 100. Since there are gaps at the assembly connection between the stair section component 100 and the support system 200, to ensure connection strength and improve the corrosion resistance of the metal locking units, adhesive is filled into the gaps or cement grouting is performed for sealing after the staircase installation is completed.

[0054] This application also adopts the following technical solution: a prefabricated building that can be assembled quickly, wherein the prefabricated building is assembled using the above-mentioned prefabricated staircase structure.

[0055] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0056] The present invention also provides a building module for rapid assembly, including a first prefabricated component, a second prefabricated component, and at least one locking unit for connecting the first prefabricated component to the second prefabricated component.

[0057] The locking unit includes a male and female connector that are mutually compatible. When locked together, the male and female connectors form a joint interface between the end face of the first precast component facing the second precast component and the second precast component. A support member suitable for supporting the first precast component is attached to the second precast component. The support member extends beyond the joint interface and one end is embedded in the second precast component to resist the shear force exerted by the first precast component on the locking unit at the joint interface. The first precast component is configured as a precast beam, a precast slab, or a precast beam-slab assembly, and the second precast component is configured as a precast column, a precast wall, or a precast room sidewall. The first and second precast components are assembled perpendicularly or intersecting at an inclined angle.

[0058] The second precast component has a stress-reducing groove for receiving the mating end of the first precast component. The engagement of the stress-reducing groove with the mating end is adapted to reduce the shear force exerted by the first precast component on the locking rod at the joint interface. The support member is connected to the second precast component by a locking unit. The second precast component has an insert groove adapted to the support member, and a tenon joint is formed between the support member and the insert groove. The support member and the first precast component are fastened together by bolts, with at least one bolt. The first precast component has a positioning groove, and the support member has a top that is embedded in the positioning groove.

[0059] The male connector has a locking rod, and the female connector is configured to prevent separation when the locking rod is inserted into the female connector. The male connector includes: a male housing, in which the locking rod is retractably inserted or extends out, and the locking rod is provided with counter-teeth adapted to connect with the female connector; and a first elastic member housed in the male housing, the first elastic member pressing against the enlarged tail end of the locking rod, and the first elastic member applying force to the locking rod in a direction that causes the other end of the locking rod to extend out of the male housing. The female connector includes: a female housing, a conical locking clip housed in the female housing, the conical locking clip having internal counter-teeth adapted to connect with the locking rod; and a power spring clamped between the female housing and the conical locking clip. The female housing has an inner conical surface on its inner side, and the conical locking clip has an outer conical surface on its outer side. Under the thrust of the power spring, the inner and outer conical surfaces press against each other to lock the locking rod. The male connector is selectively embedded in one of the first prefabricated component and the second prefabricated component, and the female connector is embedded in the other.

[0060] This invention also provides a rapidly assembled prefabricated building, which has the aforementioned building modules. The technical field of this invention is prefabricated building technology, specifically relating to a rapidly assembled prefabricated building and its building modules. The background technology of this invention is as follows: the connection between beams and columns in prefabricated buildings is the core of structural safety and also represents the advanced level of prefabricated building construction. In existing prefabricated building beam installation, the common method is to install supports at the bottom of the beam, with the reinforcing bars at the beam ends extending into the column heads, supporting formwork, tying the reinforcing bars, and pouring concrete at the beam-column joint on-site to achieve the connection. This method of beam-column connection in prefabricated buildings has low construction efficiency, higher construction costs than traditional construction methods, and no advantage in construction period. Utility model patent with authorization announcement number CN219690740U discloses a non-fixed-end mechanical connection device (hereinafter referred to as mechanical connection), which can adapt to the connection of large-sized prefabricated components. In the above-mentioned utility model, mechanical connection is applied to the connection of beams and columns. Due to the good tensile strength of mechanical connection, the use of mechanical connection makes the tensile performance of the prefabricated structure very superior. However, due to the very large local shear force at the junction of beams and columns, and the weak shear resistance of mechanically connected structures, the shear force at the connection point prevents them from fully utilizing their tensile strength advantages. Therefore, to address the shortcomings of existing technologies, a rapidly assembled building module is provided to solve the problem of poor shear resistance at the junction of beams and columns when using mechanical connections, thereby improving the connection strength of the building module and the efficiency of construction.

[0061] The invention is summarized as follows:

[0062] This application provides a rapidly assembled prefabricated building and its building module to solve the problems of low construction efficiency and poor shear resistance of traditional building construction. To achieve the above objective, this application adopts the following technical solution: a rapidly assembled building module, including a first prefabricated component, a second prefabricated component, and at least one locking unit for connecting the first prefabricated component to the second prefabricated component; the locking unit includes a male connector and a female connector that are mutually adapted, and when the male connector and the female connector are locked together, a joint interface is formed between the end face of the first prefabricated component facing the second prefabricated component and the second prefabricated component; a support member suitable for supporting the first prefabricated component is attached to the second prefabricated component, the support member extending beyond the joint interface and one end embedded in the second prefabricated component to resist the shear force exerted by the first prefabricated component on the locking unit at the joint interface.

[0063] Optionally, the first precast component is configured as a precast beam, a precast slab, or a precast beam-slab assembly, and the second precast component is configured as a precast column, a precast wall, or a precast room sidewall. Optionally, the first and second precast components are assembled vertically or intersecting at an inclined angle.

[0064] Further, the second prefabricated component has a stress-reducing groove for receiving the mating end of the first prefabricated component, the engagement of the stress-reducing groove with the mating end being adapted to reduce the shear force exerted by the first prefabricated component on the locking rod at the joint interface. As a first preferred embodiment, the second prefabricated component has an insert groove adapted to the support member, and a tenon joint is formed between the support member and the insert groove. Further, the support member and the second prefabricated component are connected by a locking unit. Further, the support member and the first prefabricated component are fastened together by bolts, with at least one bolt configured. As a second preferred embodiment, the first prefabricated component has a positioning groove, and the support member has a top that is embedded in the positioning groove. Further, the male connector has a locking rod, and the female connector is configured to prevent separation of the two when the locking rod is inserted into the female connector.

[0065] Preferably, the male connector includes: a male housing, the locking rod being retractably embedded in or extending from the male housing, the locking rod also having reverse teeth adapted to connect with the female connector; and a first elastic member housed in the male housing, the first elastic member pressing against the enlarged tail end of the locking rod, and the first elastic member applying force to the locking rod in a direction that causes the other end of the locking rod to extend out of the male housing. Preferably, the female connector includes: a female housing; a conical locking clip housed in the female housing, the conical locking clip having internal reverse teeth adapted to connect with the locking rod; and a power spring clamped between the female housing and the conical locking clip; wherein the inner side of the female housing has an inner conical surface, and the outer side of the conical locking clip also has an outer conical surface, under the thrust of the power spring, the inner and outer conical surfaces press against each other, enabling the internal reverse teeth of the conical locking clip to grip the corresponding reverse teeth of the locking rod, thereby locking the locking rod in one direction. During assembly, the locking rod can be easily inserted into the female connector. Once inserted, it cannot be pulled out. The greater the pulling force, the tighter the connection.

[0066] Furthermore, the male connector is selectively embedded in one of the first prefabricated component and the second prefabricated component, and the female connector is embedded in the other. This application also adopts the following technical solution: a rapidly assembled prefabricated building, wherein the prefabricated building is assembled using the aforementioned building modules.

[0067] The beneficial effects of the present invention are: 1. The precast beams and precast columns are mechanically connected, which ensures the tensile strength at the junction; the shear force on the locking unit at the joint interface is eliminated by the set force-reducing groove and support, thus solving the problem of poor shear resistance of the locking unit.

[0068] 2. The modular manufacturing method of prefabricated components is simple to produce, structurally safe, highly industrialized, low in manufacturing cost, and highly efficient in construction. It replaces the inefficient and complex construction steps of on-site beam installation, formwork, and concrete pouring required in traditional prefabricated buildings.

[0069] Attached Figure Description

[0070] Figure 8 is a schematic diagram of the external appearance of this utility model; Figure 9 is a schematic diagram of the internal structure of this utility model; Figure 10 is a three-dimensional schematic diagram of the second prefabricated component; Figure 11 is a three-dimensional schematic diagram of the tenon joint structure of the support component; Figure 12 is a schematic diagram of the structure of this utility model without the force-reducing groove; Figure 13 is a schematic diagram of the support component of this utility model with the addition of a locking unit; Figure 14 is a schematic diagram of the structure of the first prefabricated component of this utility model with the positioning groove; Figure 15 is a schematic diagram of the structure of the first prefabricated component of this utility model with the positioning groove and the support component with an inclined surface; Figure 16 is an assembly drawing of the embodiment in Figure 15; Figure 17 is a cross-sectional view of the embodiment in Figure 8; Figure 18 is a schematic diagram of the structure of the locking unit; Figure 19 is a three-dimensional schematic diagram of the conical locking clip; Figure 20 is a schematic diagram of the structure of the locking rod and the conical locking clip.

[0071] Explanation of reference numerals in the figure: 10, first prefabricated component; 11, positioning groove; 20, second prefabricated component; 21, force-reducing groove; 22, embedding groove; 30, locking unit; 31, male connector; 310, locking rod; 310a, reverse tooth; 311, male connector shell; 312, first elastic element; 32, female connector; 320, female connector shell; 321, conical locking clip; 321a, inner reverse tooth; 322, outer conical surface; 323, power spring; 324, inner conical surface; 33, mating interface; 40, support element; 41, bolt.

[0072] Embodiment 1 of the present invention:

[0073] As shown in Figures 8-11, this embodiment provides a rapid-assembly building module, including a first prefabricated component 10, a second prefabricated component 20, and a locking unit 30 and a support member 40 connecting the first prefabricated component 10 and the second prefabricated component 20. The locking unit 30 includes a male connector 31 and a female connector 32 that are mutually adapted. When the male connector 31 and the female connector 32 are locked together, a joint interface 33 is formed between the end faces of the first prefabricated component 10 and the second prefabricated component 20. The first prefabricated component 10 is configured as a prefabricated beam, a prefabricated slab, or a prefabricated beam-slab assembly, and the second prefabricated component 20 is configured as a prefabricated column, a prefabricated wall, or a prefabricated room sidewall. The second prefabricated component 20 has a stress-reducing groove 21 for receiving the mating end of the first prefabricated component. The cooperation between the stress-reducing groove 21 and the mating end is adapted to reduce the shear force exerted by the first prefabricated component 10 on the locking unit 30 at the joint interface 33. The support member 40 is attached to the second prefabricated member 20 to support the first prefabricated member 10. The support member 40 extends beyond the joint interface 33 and is partially embedded in the second prefabricated member 20 to resist the shear force exerted by the first prefabricated member 10 on the locking unit 30 at the joint interface 33.

[0074] In this technical solution: during the rapid assembly of building modules, a first prefabricated component 10 (beam or cantilever beam) is typically connected to a second prefabricated component 20 (prefabricated column or wall) via a locking unit 30. After the locking unit 30 completes the mechanical connection between the two, the first prefabricated component 10, the second prefabricated component 20, and the locking unit together constitute a cantilever beam structure. Since the interface 33 at the connection end between the beam and the column is planar, the beam, under its own weight, tends to move downwards, generating a downward shear force on the locking unit 30 at the interface 33. The locking unit 30, under the weight of the beam, tends to bend.

[0075] Furthermore, due to the weak shear resistance of the locking unit 30, a stress-reducing groove 21 is provided at the joint interface 33 to eliminate the shear force on the locking unit 30. The stress-reducing groove 21 is provided on the second precast component 20. When the locking unit 30 connects the first precast component 10 and the second precast component 20 again, the lower side of the connecting end of the first precast component 10 contacts the lower groove surface of the stress-reducing groove 21, bearing part of the weight of the beam and achieving an initial reduction of the shear force on the locking unit 30. In order to maximize the elimination of the shear force on the locking unit 30 and give full play to its tensile performance, an embedding groove 22 is provided on the lower side of the connecting end of the first precast component 10 and the second precast component 20. The support member 40 is embedded in it in the form of a tenon joint. The upper end of the support member 40 abuts against the lower side of the first precast component 10, supporting the first precast component 10. It should be noted that when the isolation method is used to analyze the force at the contact end of the beam and column, and the support member 40 and the second precast member 20 are considered as a whole, the joint interface 33 between the first precast member 10 (precast beam) and the second precast member 20 (precast column) changes from a vertical plane to the upper horizontal plane of the support member 40. At this time, the support member 40 bears most of the weight of the first precast member 10, and the locking unit 30 no longer bears the shear force generated by the weight of the beam itself. During the assembly of the building module, after the first precast member 10 is assembled, both ends overlap the upper end of the support member 40. At this time, the entire beam's force is borne entirely by the support members 40 at both ends, and the locking unit 30 no longer bears the shear force generated by the weight of the beam, thus maximizing the tensile strength of the locking unit 30 itself.

[0076] As shown in Figures 10-12, the first prefabricated component 10 and the second prefabricated component 20 are assembled vertically or intersecting at an inclined angle. The depth of the stress-reducing groove 21 is less than the embedding depth of the support member 40. The second prefabricated component 20 has an insertion groove 22 adapted to the support member 40, and a tenon joint is formed between the support member 40 and the insertion groove 22. As a further preferred embodiment, the support member 40 and the first prefabricated component 10 are fastened together by bolts 41, with at least one bolt 41 configured.

[0077] In this technical solution: when the depth of the stress-reducing groove 21 is less than the embedding depth of the support member 40, a force analysis is performed on one side of the first precast member 10. The side of the first precast member 10 away from the support member 40 tends to compress the support member 40 and tilt downwards. Since the stress-reducing groove 21 and the embedding groove 22 are connected vertically, the precast beam applies a positive pressure to the upper surface of the support member 40, increasing the positive pressure between the support member 40 and the embedding groove 22, further ensuring the firmness of the tenon joint structure of the support member 40. When the depth of the stress-reducing groove 21 is less than the embedding depth of the support member 40, it is the most economical solution. When the depth of the stress-reducing groove 21 is equal to or greater than the embedding depth of the support member 40, the firmness of the tenon joint structure of the support member 40 does not increase significantly, but the cost and construction difficulty increase substantially.

[0078] Example 2:

[0079] This embodiment will describe the opening of the stress-reducing groove 21 and the configuration of the bolts 41. In actual construction, the configuration of the bolts 41 depends on whether the stress-reducing groove 21 is opened on the second precast component 20, as follows:

[0080] Firstly, as shown in Figures 16, 10, and 11: When the stress-reducing groove 21 is provided, the end of the first precast component 10 applies positive pressure to the upper end of the support component 40 to compress and fix the support component 40, ensuring its secure installation within the embedding groove 21. In this case, the support component 40 does not require bolts 41 to ensure a secure connection with the first precast component 10; the bolts 41 serve to further strengthen the structural strength. Secondly, as shown in Figure 5: When it is inconvenient to provide the stress-reducing groove 21, the interface 33 between the first precast component 10 and the second precast component 20 is located on the outer surface of the second precast component 20. When the first precast component 10 bears the building load, the protruding portion of the support component 40 will sag downwards, creating a concentrated shear force on the support component 40 at the bottom edge of the embedding groove 22, which can easily cause damage to the building component. At this point, the support member 40 is secured to the nut embedded part in the first precast component 10 by bolts 41, tightly pressing the top of the support member 40 against the first precast component 10 to prevent the protruding part of the support member 40 from sagging. Since the bottom of the support member 40 and the insertion groove 22 are subjected to planar forces, and the top of the support member 40 and the bottom of the first precast component 10 are also subjected to planar forces, the damage caused by concentrated shear force is resolved. Furthermore, after the first precast component 10 and the second precast component 20 are connected, there is a gap at the connection point. To ensure the connection strength, it is necessary to fill the gap at the connection point with adhesive or perform cement grouting.

[0081] Example 3:

[0082] This embodiment, based on Embodiment 2, proposes an alternative implementation method for situations where it is inconvenient to create a stress-reducing groove 21. Specifically, as shown in Figure 13, when the second prefabricated component 20 does not have a stress-reducing groove 21, the support 40 is embedded in the insertion groove 22. Since the protruding portion of the support 40 will sag downwards when the first prefabricated component 10 bears the building load, the bottom edge of the insertion groove 22 will exert a concentrated shear force on the support 40, easily causing damage to the building component. To ensure a stable connection between the insertion groove 22 and the support 40, one end of the support 40 is completely embedded in the insertion groove 22 and abuts against its side wall, and the two are fixed together using a locking unit 30. A male connector 31 or a female connector 32 is provided in the second prefabricated component 20 at the connection end face between the insertion groove 22 and the support 40, and the corresponding female connector 32 or male connector 31 is then fixed at the corresponding position on the support 40. When the support member 40 is subjected to downward pressure and shear force from the first precast component 10, the locking unit 30 installed in the second precast component 20 secures the support member 40, converting a portion of the shear force borne by the support member 40 into tensile stress in the locking unit 30, thereby improving the connection strength of the structural node. To further ensure the connection strength between the support member 40 and the first precast component 10, in addition to the locking unit 30 connection in the support member 40, bolts 41 can be installed in the support member 40 and fastened to the nut embedded in the first precast component 10, further enhancing the structural strength of the connection between the first precast component 10 and the second precast component 20.

[0083] Example 4:

[0084] As shown in Figures 14-17, this embodiment provides another implementation of the tenon joint of the support member 40 in this application:

[0085] As a further optimization of this embodiment, the lower end of the support member 40 and the bottom of the groove 22 are respectively set as inclined slopes. When the support member 40 is inserted into the groove 22 of the second prefabricated member 20, the contact area between the two slopes is increased, resulting in greater load-bearing capacity. Furthermore, to ensure that the support member 40 can be stably connected to the first prefabricated member 10, a positioning groove 11 is opened at the bottom of the first prefabricated member 10. The upper end of the support member 40 is embedded in the positioning groove 11 and fixed to the first prefabricated member 10, preventing the support member 40 from moving in the opposite direction to the second prefabricated member 20 after being subjected to force and then drooping, which would affect the support stability of the support member 40. Furthermore, bolts 41 are arranged inside the support member 40 to be fastened to the nut embedded part in the first precast component 10, which prevents the support member 40 from coming out of the positioning groove 11 at the bottom of the first precast component 10 and improves the stability and strength of the connection of the support member 40. At this time, the contact surface between the support member 40 and the embedding groove 22 is a downwardly inclined slope. Since the angle between the normal of the slope and the direction of force applied after the precast beam bends is an acute angle, the normal pressure on the slope of the support member 40 is the component of the force F applied by the precast beam. The angle between the normal of the slope and the perpendicular of the extension direction of the precast beam is an acute angle α. The normal pressure on the slope of the support member 40 is F multiplied by the cosine of the angle. The force applied by the first precast member 10 to the support member 40 is transformed into the normal pressure between the slope of the support member and the bottom slope of the embedding groove. This effectively transforms the downward shear force of the first precast member 10 on the support member 40 into the downward pressure on the second precast member 20. The other part of the horizontal thrust on the first precast component 10 and the second precast component 20 caused by the force on the inclined surface at the bottom of the groove can be borne by the locking unit 30 set at the joint interface 33 of the first precast component 10 and the second precast component 20, which can effectively give full play to the superiority of the high tensile strength of the locking unit 30.

[0086] Example 5:

[0087] As shown in Figures 18-20, this embodiment provides a preferred implementation of the locking unit 30, as detailed below:

[0088] The male connector 31 has a locking lever 310, and the female connector 32 is configured to prevent separation of the two when the locking lever 310 is inserted into the female connector 32. The male connector 31 includes: a male housing 311; a locking lever 310 retractably embedded in the male housing 311, the protruding end of the locking lever 310 having a reverse tooth 310a adapted to connect with the female connector 32; and a first elastic member 312 housed within the male housing 311, the first elastic member 312 pressing against and applying force to the enlarged tail end of the locking lever 310, such that the other end of the locking lever 310 can extend along the extending direction of the male housing 311.

[0089] Alternatively, based on the above scheme, when prefabricated building components are installed sequentially, to save costs, the locking rod 310 can omit its telescopic function, reducing the length of the male connector shell 311 and saving material costs. The locking rod 310 can extend from inside the male connector shell 311 to meet the connection requirements. Further, the female connector 32 includes: a female connector shell 320; a conical locking clip 321 housed in the female connector shell 320; and a power spring 323 clamped between the female connector shell 320 and the conical locking clip 321, providing a continuous forward thrust to the conical locking clip 321; the inner side of the conical locking clip 321 has internal countertooth teeth 321a that are adapted to connect with the locking rod 310. The inner side of the female connector 320 has an inner conical surface 324, and the outer side of the conical locking clip 321 has an outer conical surface 322. Under the thrust of the power spring 323, the inner conical surface 324 and the outer conical surface 322 press against each other, which allows the inner reverse teeth 321a of the conical locking clip to grip the corresponding reverse teeth 310a of the locking rod 310, thereby locking the locking rod 310 in one direction. During assembly, the locking rod 310 can be easily inserted into the female connector 32 and cannot be pulled out. The greater the pulling force, the tighter the grip. The male connector 31 is selectively embedded in one of the first prefabricated component 10 and the second prefabricated component 20, and the female connector 32 is embedded in the other.

[0090] In this technical solution: the first elastic element 312 can be a spring, which is always in a compressed state, and one end of the spring presses against the enlarged end of the locking rod 310 to ensure that the locking rod 310 always extends out of the male connector shell 311. When assembling the first prefabricated component 10, the locking rod 310 is compressed into the male connector shell 311. After assembly, once the male connector 31 and the female connector 32 are aligned, the locking rod 310 pops out from the male connector shell 311 and inserts into the female connector 32 to achieve connection.

[0091] Furthermore, the first precast component 10 is installed into the stress-reducing groove 21, which has a positioning function and can initially position the installation position of the first precast component 10 during assembly. Since the entire locking unit 30 must ensure the tensile strength of the precast column and precast beam, to increase the stability of the entire locking unit 30 and achieve its maximum tensile performance, the principle of unidirectional locking between the male connector 31 and the female connector 32 is as follows: A reverse tooth 310a is provided on the outer surface of the extended end of the locking rod 310, and simultaneously, an inner reverse tooth 321a is provided on the inner wall of the conical locking clip 321, to achieve mechanical locking and improve the tensile performance and structural strength of the locking unit 30. When the male connector 31 and the female connector 32 are connected, one end of the locking rod 310 is inserted into the female housing 320 and presses the conical locking clip 321. After being subjected to force, the conical locking clip 321 presses the power spring 323 downward (or backward) and pushes the conical locking clip 321 outward (the conical locking clip 321 is ring-shaped. To improve the locking performance of the conical locking clip 321, it is preferable to have three clips that interlock with each other to form a ring). When the connecting end of the locking rod 310 is fully inserted into the conical locking clip 321, the reverse teeth 310a of the locking rod 310 and the inner reverse teeth 321a of the conical locking clip 321 engage. When under tension, the outer conical surface 322 of the conical locking clip 321 and the inner conical surface 324 of the inner side of the female connector shell 320 undergo inclined surface transmission. The inner conical surface 324 and the outer conical surface 322 exert mutual compression, which enables the inner reverse teeth 321a of the conical locking clip to grip the reverse teeth 310a on the surface of the locking rod 310, thereby locking the locking rod 310 and preventing it from being pulled out. The greater the pulling force, the tighter the grip, forming a compression locking effect that tightens as it is pulled. A preferred embodiment of the locking unit 30 can be found in the patent "A Tooth-Clamping Compression Type Anti-Return Steel Rebar Connector" with authorization announcement number CN216305149U. This application also adopts the following technical solution: a prefabricated building that can be assembled quickly, wherein the prefabricated building uses the above-mentioned building modules for rapid assembly. The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A prefabricated staircase structure, characterized in that, include: A staircase component having at least one staircase segment; as well as A support system having a first locking part adapted to be assembled with the lower end of the stair section and a second locking part adapted to be assembled with the upper end of the stair section; The first locking part includes at least one first locking space with an acute angle, and a first locking unit adapted to keep the lower end of the stair section within the first locking space. The second locking part includes at least one second locking space with an obtuse angle, and a second locking unit adapted to keep the upper end of the stair section within the second locking space.

2. The prefabricated staircase structure according to claim 1, characterized in that: The staircase component includes a first staircase segment, and the support system includes support A and support B. The lower end of the first stair section is locked to a first locking part disposed on support A, and the upper end of the first stair section is locked to a second locking part disposed on support B.

3. The prefabricated staircase structure according to claim 2, characterized in that: The staircase component also includes a second staircase, the lower end of which is locked together with a first locking part disposed on support member B.

4. The prefabricated staircase structure according to claim 3, characterized in that: The B support member, which is equipped with the first locking part and the second locking part, is constructed as a stair platform.

5. The prefabricated staircase structure according to claim 1, characterized in that: The first locking space includes a first reference locking surface and a first inclined locking surface that is inclined upwards from the first reference locking surface, and the lower end of the stair section is at least partially embedded in the first locking space.

6. The prefabricated staircase structure according to claim 1 or 5, characterized in that: The second locking space includes a second reference locking surface and a second inclined locking surface that is inclined downwards from the second reference locking surface, and the upper end of the stair section is at least partially embedded in the second locking space.

7. The prefabricated staircase structure according to claim 1, characterized in that: At least one end of the stair section is provided with a positive corner reinforcement, and a negative corner reinforcement is provided in the first locking space and / or the second locking space, wherein the positive corner reinforcement and the negative corner reinforcement are compatible with each other.

8. The prefabricated staircase structure according to claim 1, characterized in that, The opening of the first locking space is tilted upward, and the opening of the second locking space is tilted downward.

9. The prefabricated staircase structure according to claim 1, characterized in that: The first locking unit is configured as a male connector or a female connector, and the second locking unit is configured as a male connector or a female connector; The male connector is disposed on one of the ladder segment components and the support system, and the female connector is disposed on the other of the ladder segment components and the support system. The male connector has a resiliently extendable locking rod, and the female connector is configured to prevent separation when the locking rod is inserted into the female connector.

10. A prefabricated building that can be assembled quickly, characterized in that, The prefabricated building has the prefabricated staircase structure as described in any one of claims 1-9.

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