Prefabricated stair
By employing connection structures such as positioning holes, through holes, dovetail grooves, and dovetail tenons in prefabricated stairs, combined with the tight connection of positioning columns, threaded columns, and dovetail tenons, the problem of poor connection strength in prefabricated stairs has been solved, resulting in a stable stair structure and a simplified construction process, thus improving construction efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI TONGJIAN CONSTR GRP CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-10
AI Technical Summary
The current prefabricated staircases may have poor connection strength due to the use of a single connection method during installation. This may result in insufficient load resistance, fatigue damage or corrosion at the connection points, and an increased risk of structural failure.
The staircase employs connection structures such as positioning holes, through holes, dovetail grooves, and dovetail tenons, combined with the tight connection of positioning posts, threaded posts, and dovetail tenons, to ensure the accuracy and reliability between staircase modules. Bolted connections facilitate disassembly and maintenance, increasing the stability and safety of the staircase.
It improves the installation strength and stability of the stairs, simplifies the construction process, reduces construction difficulty and maintenance costs, extends service life, and ensures safety and construction efficiency.
Smart Images
Figure CN224106754U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of prefabricated building, in particular to a prefabricated stair. BACKGROUND
[0002] The traditional concrete cast-in-place stair construction method is old, the construction process is complicated, the construction period is long, and the construction cost of the building is increased. In order to shorten the construction period and improve the quality of the stair, the development of prefabricated stair gradually becomes a trend.
[0003] However, if only a single connection method is used to connect the existing prefabricated stair during installation, the connection strength may be poor. This connection method may not be able to fully resist various loads received by the stair during use. In the long-term use process, due to the influence of load and environmental factors, fatigue damage or corrosion may occur at the connection part, which may cause the overall performance of the stair to decline, thereby increasing the risk of stair structure failure. CONTENT OF THE UTILITY MODEL
[0004] In view of the defects of the prior art, the present application provides a prefabricated stair, which has the advantages of improving the installation strength, etc. The problem that if only a single connection method is used to connect the existing prefabricated stair during installation, the connection strength may be poor, and this connection method may not be able to fully resist various loads received by the stair during use, in the long-term use process, due to the influence of load and environmental factors, fatigue damage or corrosion may occur at the connection part, which may cause the overall performance of the stair to decline, thereby increasing the risk of stair structure failure.
[0005] To achieve the above purpose, the present application provides the following technical scheme: a prefabricated stair, comprising a stair plate, an upper setting table and a lower setting table, the two sides of the stair plate are respectively fixedly connected with upper connecting plates and lower connecting plates, the interiors of the upper connecting plates and the lower connecting plates are both provided with two positioning holes arranged in mirror image, the interiors of the upper connecting plates and the lower connecting plates are both provided with four through holes arranged in a rectangular array, one side of each of the upper connecting plates and the lower connecting plates is fixedly provided with three dovetail grooves arranged in a straight line, one side of each of the upper setting table and the lower setting table is fixedly connected with a support plate, the upper ends of the two support plates are both fixedly connected with two positioning columns arranged in mirror image, the upper ends of the two support plates are both fixedly connected with four threaded columns arranged in a rectangular array, and one side of each of the lower connecting plate and the upper setting table is fixedly connected with three dovetail tenons arranged in a straight line.
[0006] Through the above scheme, the stair plate is connected with the upper and lower setting tables through the upper and lower connecting plates, so that the overall structure of the stair is stable and can bear a large load. The positioning hole, through hole, dovetail groove and dovetail tenon connection structure are arranged to ensure the connection accuracy and reliability between the stair modules, avoid safety hazards caused by unstable connection, and improve the connection strength through the close connection between the positioning column, threaded column and dovetail tenon between the components, so that the overall structure of the stair is more stable, the installation process is simple and fast, the construction difficulty is reduced, the construction efficiency is improved, and the construction period is shortened.
[0007] Further, four mounting grooves arranged in a rectangular array are formed in the upper ends of the upper and lower connecting plates.
[0008] Through the above scheme, the mounting groove can accommodate the fastener, which can be hidden inside the stair without damaging the overall aesthetics of the stair and maintaining the flatness.
[0009] Further, the plurality of threaded columns are slidingly arranged inside the through hole, and the plurality of threaded columns are threadedly connected with the nut at one end passing through the through hole in groups of four.
[0010] Through the above scheme, the sliding cooperation of the threaded column and the through hole, combined with the fastening effect of the nut, forms a reliable connection mechanism, which is not only stable but also can bear a large load, ensuring the safety and stability of the stair during use.
[0011] Further, a dust cover is slidingly arranged in each of the plurality of mounting grooves.
[0012] Through the above scheme, the main function of the dust cover is to prevent dust, debris and other foreign matter from entering the mounting groove, thereby maintaining the cleanliness and dryness of the mounting groove, which helps to prevent damage to the connecting parts caused by dust accumulation and helps to prolong the service life of the stair.
[0013] Further, a plurality of bases arranged in a straight line are fixedly connected to the surfaces of the stair plates, and a plurality of steps are fixedly connected to the outer walls of the bases by bolts.
[0014] Through the above scheme, the fixed connection of the base and the stair plate, and the connection of the step and the base by the bolt, jointly constitute a stable stair structure. The step is connected to the base by the bolt, which makes the installation and disassembly of the step relatively simple. When the step needs to be replaced or repaired, the step can be easily removed by loosening the bolt, which reduces the maintenance cost and time. The bolt connection design makes it easy to separate and reassemble the components of the stair, facilitating daily maintenance and inspection. When the step or base is found to be damaged, it can be repaired or replaced in time to ensure the safety and service life of the stair.
[0015] Further, a plurality of anti-skid grooves arranged in a straight line array are arranged on one side of the upper end of each of the steps.
[0016] Through the above scheme, the design of the anti-skid groove is mainly to increase the friction coefficient of the step surface, thereby preventing the slipping accident of pedestrians during walking due to the wet and slippery ground, and improving the safety of the staircase.
[0017] Further, a plurality of reinforcing ribs arranged in a straight line array are fixedly connected to the bottom end of the staircase plate.
[0018] Through the above scheme, the main function of the reinforcing rib is to increase the bending strength and load-bearing capacity of the staircase plate, prevent deformation or damage of the staircase plate during long-term use, so that the staircase can bear greater load and maintain the integrity and stability of its structure.
[0019] Further, the four positioning columns are slidingly arranged inside the positioning holes, and the plurality of dovetail tenons are slidingly arranged inside the dovetail grooves.
[0020] Through the above scheme, the sliding cooperation of the positioning column and the positioning hole, and the sliding cooperation of the dovetail tenon and the dovetail groove, the sliding connection of the dovetail tenon and the dovetail groove not only provides accurate positioning, but also enhances the connection strength through the special shape design, and the inclined surface design of the dovetail groove enables the dovetail tenon to generate greater friction after insertion, thereby effectively preventing the movement between the staircase components and improving the overall stability of the staircase.
[0021] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:
[0022] The prefabricated staircase is connected with the upper and lower setting tables through the upper and lower connecting plates, so that the overall structure of the staircase is stable and can bear greater load. The connection accuracy and reliability between the staircase modules are ensured by the positioning holes, through holes, dovetail grooves and dovetail tenons, and the connection strength is improved by the close connection between the positioning columns, threaded columns and dovetail tenons, so that the overall structure of the staircase is more stable, the installation process is simple and fast, the construction difficulty is reduced, the construction efficiency is improved, and the construction period is shortened. The base is fixedly connected with the staircase plate, and the steps are connected with the base through bolts, which together form a stable staircase structure. The steps are connected with the base through bolts, which makes the installation and disassembly of the steps relatively simple. When the steps need to be replaced or repaired, the steps can be easily removed by loosening the bolts, which reduces the maintenance cost and time. The bolt connection design makes it easy to separate and recombine the components of the staircase, which is convenient for daily maintenance and inspection. When the steps or base are damaged, they can be repaired or replaced in time to ensure the safety and service life of the staircase. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this application;
[0024] Figure 2 This is a schematic diagram of the upper and lower connecting plate structure of this application;
[0025] Figure 3 This is a schematic diagram of the upper and lower platform structure of this application.
[0026] Figure 4 This is a schematic diagram of the installation structure of the structure in this application.
[0027] In the picture:
[0028] 1. Stair tread; 2. Upper connecting plate; 3. Lower connecting plate; 4. Upper platform; 5. Lower platform; 6. Positioning hole; 7. Through hole; 8. Dovetail groove; 9. Support plate; 10. Positioning post; 11. Threaded post; 12. Dovetail tenon; 13. Mounting groove; 14. Nut; 15. Dust cover; 16. Base; 17. Step; 18. Anti-slip groove; 19. Reinforcing rib. Detailed Implementation
[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0030] Please see Figure 1 , Figure 2 and Figure 3The prefabricated stair of the embodiment comprises a stair plate 1, an upper setting table 4 and a lower setting table 5, the upper and lower sides of the stair plate 1 are fixedly connected with upper and lower connecting plates 2 and 3, respectively, two positioning holes 6 arranged in mirror image are formed in the interiors of the upper and lower connecting plates 2 and 3, four through holes 7 arranged in a rectangular array are formed in the interiors of the upper and lower connecting plates 2 and 3, three dovetail grooves 8 arranged in a straight line are fixedly formed on one side of the upper and lower connecting plates 2 and 3, the upper and lower setting tables 4 and 5 are fixedly connected with support plates 9 on one side, the stair plate 1 is connected with the upper and lower setting tables 4 and 5 through the upper and lower connecting plates 2 and 3, so that the overall structure of the stair is stable, two positioning columns 10 arranged in mirror image are fixedly connected to the upper ends of the two support plates 9, four threaded columns 11 arranged in a rectangular array are fixedly connected to the upper ends of the two support plates 9, three dovetail tenons 12 arranged in a straight line are fixedly connected to one side of the lower connecting plate 3 and the upper setting table 4, the components are tightly connected through the structures of the positioning columns 10, the threaded columns 11 and the dovetail tenons 12, the connection strength is improved, the overall structure of the stair is more stable, the installation process is simple and fast, the construction difficulty is reduced, the construction efficiency is improved, and the construction period is shortened.
[0031] Please refer to Figure 1 , Figure 2 and Figure 4 Four mounting grooves 13 arranged in a rectangular array are formed in the upper ends of the upper and lower connecting plates 2 and 3, the mounting grooves 13 can accommodate fasteners, the fasteners can be hidden inside the stair, the overall aesthetic appearance of the stair is not damaged, the flatness is maintained, the plurality of threaded columns 11 are slidingly arranged in the through holes 7, the plurality of threaded columns 11 are threadedly connected with the nuts 14 at one end passing through the through holes 7 in groups of four, the threaded columns 11 are slidingly matched with the through holes 7, and the fastening effect of the nuts 14 is added, so that a reliable connection mechanism is formed, which is not only stable but also can bear a large load, ensuring the safety and stability of the stair during use, and the plurality of mounting grooves 13 are slidingly provided with dust covers 15 inside, the main function of the dust covers 15 is to prevent dust, sundries and the like from entering the interiors of the mounting grooves 13, so as to maintain the cleanliness and dryness of the mounting grooves 13, which helps to prolong the service life of the stair by preventing the damage of the connecting parts caused by dust accumulation.
[0032] Please refer to Figure 2 , Figure 3 and Figure 4The surface of the stair plate 1 is fixedly connected with a plurality of bases 16 arranged in a linear array, the outer wall of each base 16 is fixedly connected with a step 17 through a bolt, the fixed connection of the base 16 with the stair plate 1 and the connection of the step 17 with the base 16 through a bolt jointly form a stable stair structure, the connection of the step 17 with the base 16 through a bolt makes the installation and disassembly of the step 17 relatively simple, when the step 17 needs to be replaced or repaired, the step 17 can be easily removed by loosening the bolt, which reduces the maintenance cost and time, the bolt connection design makes it easy to separate and recombine the components of the stair, which is convenient for daily maintenance and inspection, when the step 17 or the base 16 is found to be damaged, it can be repaired or replaced in time to ensure the safety and service life of the stair, a plurality of anti-skid grooves 18 are arranged in a linear array on one side of the upper end of each step 17, the design of the anti-skid groove 18 is mainly to increase the friction coefficient of the surface of the step 17, so as to prevent pedestrians from slipping and falling during walking due to wet and slippery feet, and to improve the safety of the stair, a plurality of reinforcing ribs 19 are fixedly connected to the bottom end of the stair plate 1 in a linear array, the main function of the reinforcing rib 19 is to increase the bending strength and load-bearing capacity of the stair plate 1, so as to prevent the stair plate 1 from deforming or being damaged during long-term use, so that the stair can bear greater load and maintain the integrity and stability of its structure, the four positioning columns 10 are slidingly arranged in the positioning holes 6, and the plurality of dovetail joints 12 are slidingly arranged in the dovetail grooves 8, the sliding fit of the positioning column 10 with the positioning hole 6 and the sliding fit of the dovetail joint 12 with the dovetail groove 8, the sliding connection of the dovetail joint 12 with the dovetail groove 8 not only provides accurate positioning, but also enhances the connection strength through its special shape design, the slope design of the dovetail groove 8 makes the dovetail joint 12 produce greater friction after insertion, thereby effectively preventing the movement between the stair components and improving the overall stability of the stair.
[0033] The precast stair in the embodiment is connected with the upper setting table 4 and the lower setting table 5 through the upper connecting plate 2 and the lower connecting plate 3 and the stair plate 1, so that the overall structure of the stair is stable and can bear a large load. The positioning hole 6, the through hole 7, the dovetail groove 8 and the dovetail tenon 12 and other connecting structures are arranged, so that the connection accuracy and reliability between the stair modules are ensured, and the safety hidden danger caused by unstable connection is avoided. The various components are tightly connected through the positioning column 10, the threaded column 11 and the dovetail tenon 12 and other structures, the connection strength is improved, the overall structure of the stair is more stable, the installation process is simple and fast, the construction difficulty is reduced, the construction efficiency is improved, the construction period is shortened, the base 16 is fixedly connected with the stair plate 1, the step 17 is connected with the base 16 through a bolt, and a stable stair structure is jointly formed. The step 17 is connected with the base 16 through a bolt, the design makes the installation and disassembly of the step 17 relatively simple, when the step 17 needs to be replaced or maintained, the step 17 can be easily taken down by loosening the bolt, the maintenance cost and time are reduced, the design of the bolt connection makes the components of the stair easy to separate and recombine, and daily maintenance and inspection are facilitated, when the step 17 or the base 16 is found to be damaged, the step 17 or the base 16 can be repaired or replaced in time, so that the safety and service life of the stair are ensured.
[0034] It should be noted that the upper connecting plate 2 is connected with the upper setting table 4 through the dovetail groove 8 and the dovetail tenon 12, and the lower connecting plate 3 is connected with the lower setting table 5 through the dovetail groove 8 and the dovetail tenon 12.
[0035] The working principle of the above embodiment is as follows:
[0036] First, the upper and lower setting tables 4 and 5 are placed in the predetermined positions respectively, and connected with the support plate 9 through the upper and lower connecting plates 2 and 3 on both sides of the stair plate 1, the positioning column 10 is slidably inserted into the positioning hole 6 of the upper and lower connecting plates 2 and 3, ensuring that the positioning column 10 tightly fits the positioning hole 6, achieving preliminary positioning and fixing, the dovetail groove 8 on the upper and lower connecting plates 2 and 3 is slidably matched with the dovetail tenon 12 on the upper and lower setting tables 4 and 5, ensuring that the dovetail groove 8 tightly fits the dovetail tenon 12, due to the inclined surface design of the dovetail groove 8, the dovetail tenon 12 will generate greater friction after insertion, thereby effectively preventing relative movement between the stair components and improving the overall stability of the stairs, the threaded column 11 is slidably inserted into the through hole 7 of the connecting plate, ensuring that the threaded column 11 can smoothly pass through the through hole 7, at one end of the threaded column 11 passing through the through hole 7, a nut 14 is used for fastening, ensuring that the connection between the threaded column 11 and the connecting plate and the setting table is firm and reliable, the step 17 is connected with the base 16 through bolts, ensuring that the step 17 is installed firmly and stably, the anti-skid groove 18 on the step 17 design can increase the friction coefficient of the surface of the step 17, preventing pedestrians from slipping and falling during walking due to slippery feet, the dust cover 15 is slidably installed in the installation groove 13 of the connecting plate, ensuring that the dust cover 15 can completely cover the installation groove 13, preventing dust, debris and other objects from entering the inside of the installation groove 13, a plurality of reinforcing ribs 19 are fixedly installed at the bottom end of the stair plate 1, increasing the bending strength and carrying capacity of the stair plate 1, preventing the stair plate 1 from deforming or being damaged during long-term use, and finally checking can complete the installation.
[0037] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "includes a", "including", does not, without more constraints, preclude the existence of additional identical elements other than the listed elements.
[0038] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.
Claims
1. A prefabricated staircase comprising a staircase board (1), an upper landing (4) and a lower landing (5), characterized in that: The stair plate (1) is fixedly connected with upper and lower connecting plates (2) and (3) on both sides, the upper and lower connecting plates (2) and (3) are provided with two mirror image distributed positioning holes (6) in the inside, the upper and lower connecting plates (2) and (3) are provided with four rectangular array threaded holes (7) in the inside, the upper and lower connecting plates (2) and (3) are provided with three straight line array dovetail grooves (8) on one side, the upper and lower connecting plates (4) and (5) are provided with support plates (9) on one side, the support plates (9) are provided with two mirror image distributed positioning columns (10) on the upper end, the support plates (9) are provided with four rectangular array threaded columns (11) on the upper end, the lower connecting plate (3) and the upper connecting plate (4) are provided with three straight line array dovetail tenons (12) on one side.
2. A pre-fabricated stair according to claim 1, characterized in that: The upper and lower connecting plates (2) and (3) are provided with four rectangular array mounting grooves (13) on the upper end.
3. A pre-fabricated stair according to claim 1, characterized in that: The threaded columns (11) are slidably arranged in the threaded holes (7), and the threaded columns (11) are threadedly connected with nuts (14) on one end of the threaded holes (7).
4. A pre-fabricated stair according to claim 2, wherein: The dustproof covers (15) are slidably arranged in the mounting grooves (13).
5. A pre-fabricated stair according to claim 1, characterized in that: The stair plate (1) is fixedly connected with a plurality of straight line array bases (16) on the surface, and the bases (16) are fixedly connected with steps (17) through bolts.
6. A pre-fabricated stair according to claim 5, wherein: The steps (17) are provided with a plurality of straight line array anti-skid grooves (18) on one side of the upper end.
7. A pre-fabricated stair according to claim 1, characterized in that: The stair plate (1) is fixedly connected with a plurality of straight line array reinforcing ribs (19) on the bottom end.
8. A pre-fabricated stair according to claim 1, characterized in that: The positioning columns (10) are slidably arranged in the positioning holes (6), and the dovetail tenons (12) are slidably arranged in the dovetail grooves (8).