A connecting structure of a fabricated stair

Abstract

The utility model discloses a kind of connecting structure of fabricated stair, it is related to fabricated stair field, including embedded column, embedded column has four and two two symmetrical fixed embedded in two ladder beams, one prefabricated stair is installed on two ladder beams, prefabricated stair is set on four embedded columns, two mobile limiting components are symmetrically movably installed on embedded column, mobile limiting component is simultaneously located in prefabricated stair, and mobile limiting component is composed of limiting block, anti-slip block and reset spring, anti-slip block is fixedly installed at the lower end of limiting block, by setting the connecting structure consisting of embedded column, mobile limiting component, fixed extrusion component, on the one hand, without relying on traditional grouting, welding and other complex processes, only by prefabricated stair and the bolt fastening of fixed extrusion component can be completed installation by the insertion of embedded column, operating procedure is simple, and the technical requirement of construction personnel is low, can significantly shorten on-site construction time, reduce manpower and equipment cost.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated stairs, and in particular to a connection structure for prefabricated stairs. Background Technology

[0002] Prefabricated staircases, as one of the core components of prefabricated buildings, effectively shorten the construction cycle and reduce dust and noise pollution caused by on-site wet work (such as concrete pouring) due to their standardized prefabrication in factories and rapid on-site assembly. At the same time, precise factory processing ensures the dimensional accuracy and structural stability of components, leading to their increasingly widespread application in residential, commercial, and public facility construction. A typical installation process involves hoisting the prefabricated staircase to the designated location using lifting equipment, initially aligning the pre-drilled connection holes of the staircase with the embedded components of the stair beams, and coarsely adjusting the horizontal and vertical positions. Finally, rigid connections between the staircase and the stair beams are achieved through bolt tightening, grouting (such as sleeve grouting), or welding, ensuring that the overall structure meets load-bearing requirements.

[0003] However, the traditional connection and installation process for prefabricated stairs remains cumbersome and complex, hindering further improvements in construction efficiency. Some traditional connection structures (such as fully grouted sleeve connections) require multiple steps including formwork, grouting, and curing. The curing process is significantly affected by ambient temperature and humidity, extending the construction period. Furthermore, the grouting quality needs to be verified through professional testing methods, increasing construction costs and management difficulty. Therefore, this application proposes a connection structure for prefabricated stairs to address these issues. Utility Model Content

[0004] The main purpose of this utility model is to provide a connection structure for prefabricated stairs, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A prefabricated staircase connection structure includes four embedded columns, each symmetrically and fixedly embedded in two stair beams. A prefabricated staircase is installed on each of the two stair beams and nested within the four embedded columns. Two movable limiting components are symmetrically and movably installed on each embedded column, and are located within the prefabricated staircase. Each movable limiting component consists of a limiting block, an anti-detachment slider, and a return spring. The anti-detachment slider is fixedly installed at the lower end of the limiting block, and the return spring is fixedly installed at the outer end of the anti-detachment slider. Two fixed pressing components are installed on the prefabricated staircase, and are located between the four movable limiting components on the two embedded columns. Each fixed pressing component consists of a cylinder, pressing rods, and bolts. Two pressing rods are symmetrically and fixedly installed on the outer wall of the cylinder, and the bolts are movably installed inside the cylinder.

[0006] Preferably, four insertion slots are symmetrically provided at the lower ends of both sides of the prefabricated staircase, and two limiting slots are symmetrically provided on the inner wall of the insertion slots. The limiting slots are also provided at the upper ends of the prefabricated staircase. Four connecting slots are symmetrically provided at the upper ends of both sides of the prefabricated staircase, and two receiving slots are symmetrically provided at the upper ends of both sides of the prefabricated staircase. The connecting slots are connected to the insertion slots and the receiving slots. Threaded blind holes are provided on the inner wall of the receiving slots. The prefabricated staircase is fitted onto the embedded columns through the insertion slots, and the prefabricated staircase is simultaneously installed on two stair beams.

[0007] Preferably, the upper end of the pre-embedded column is provided with a guide rail groove.

[0008] Preferably, the cylinder on the fixed extrusion assembly is inserted into the receiving groove, the upper end of the cylinder has a receiving groove, the lower end of the cylinder has a through hole, the receiving groove and the through hole are interconnected, the extrusion rod is inserted into the connecting groove and the insertion groove, the extrusion rod is simultaneously inserted between the two limiting blocks on the two moving limiting assemblies, and the bolt passes through the through hole and is installed in the threaded blind hole.

[0009] Preferably, the anti-detachment slider on the fixed extrusion assembly is slidably installed in the guide rail groove, the reset spring is also located in the guide rail groove, the limiting block is slidably installed on the upper end of the pre-embedded column, and the limiting block is stuck in the limiting groove under the extrusion of the extrusion rod.

[0010] Compared with the prior art, the present invention has the following beneficial effects: By setting up a connection structure consisting of embedded columns, movable limiting components, and fixed extrusion components, on the one hand, the complex processes of traditional grouting and welding are eliminated. Installation can be completed simply by inserting and aligning the precast staircase with the embedded column and tightening the bolts of the fixed extrusion components. The operation is simple, requires low technical skills from construction personnel, and can significantly shorten on-site construction time and reduce labor and equipment costs. On the other hand, the limiting block of the movable limiting component and the limiting groove of the precast staircase form a rigid engagement. Combined with the positioning of the embedded column and the tightening of the bolts, multi-dimensional stable constraints can be achieved, effectively preventing problems such as loosening and displacement of the precast staircase during use and improving structural safety. In addition, the setting of the return spring ensures that the movable limiting component is always completely at the top of the embedded column before assembly with the precast staircase. This ensures that the presence of the movable limiting component will not obstruct the precast staircase from being fitted onto the embedded column, facilitating the smooth installation of the precast staircase onto the embedded column. Attached Figure Description

[0011] Figure 1 A structural diagram showing a prefabricated staircase fixedly installed on a stair beam using embedded columns, movable limiting components, and fixed extrusion components. Figure 2This is a schematic diagram showing the positional relationship between the embedded column, the movable limiting component, the fixed extrusion component, and the ladder beam of this utility model. Figure 3 This is a schematic diagram showing the positional relationship between the prefabricated staircase of this utility model after it has been cut apart and the embedded column, the movable limiting component, and the fixed extrusion component. Figure 4 This is a cross-sectional view of the prefabricated staircase of this utility model; Figure 5 This is an exploded view of the embedded column and the movable limiting component of this utility model; Figure 6 This is an exploded view of the fixed extrusion assembly of this utility model.

[0012] In the diagram: 1. Embedded column; 2. Moving limiting component; 3. Fixed extrusion component; 4. Ladder beam; 5. Precast staircase; 6. Insert slot; 7. Limiting slot; 8. Connecting slot; 9. Receiving slot; 10. Threaded blind hole; 11. Guide rail slot; 12. Limiting block; 13. Anti-detachment slider; 14. Return spring; 15. Cylinder; 16. Storage slot; 17. Through hole; 18. Extrusion rod; 19. Bolt. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, a prefabricated staircase connection structure includes four embedded columns 1, which are symmetrically and fixedly embedded in two stair beams 4. A prefabricated staircase 5 is installed on the two stair beams 4 and is fitted onto the four embedded columns 1. Two movable limiting components 2 are symmetrically and movably installed on the embedded columns 1. The movable limiting components 2 are located inside the prefabricated staircase 5. The movable limiting components 2 consist of a limiting block 12, an anti-detachment slider 13, and a return spring 14. The anti-detachment slider 13 is fixedly installed at the lower end of the limiting block 12, and the return spring 14 is fixedly installed at the outer end of the anti-detachment slider 13. Two fixed pressing components 3 are installed on the prefabricated staircase 5 and are located between the four movable limiting components 2 on the two embedded columns 1. The fixed pressing components 3 consist of a cylinder 15, a pressing rod 18, and a bolt 19. Two pressing rods 18 are symmetrically and fixedly installed on the outer wall of the cylinder 15, and the bolts 19 are movably installed inside the cylinder 15. The connection structure is formed by the embedded columns 1... The connection structure consisting of the movable limiting component 2 and the fixed extrusion component 3 has several advantages. First, it eliminates the need for complex processes such as traditional grouting and welding. Installation can be completed simply by inserting and aligning the precast staircase 5 with the embedded column 1 and tightening the bolts 19 of the fixed extrusion component 3. This simple operation requires less technical expertise from construction personnel, significantly shortening on-site construction time and reducing labor and equipment costs. Second, the limiting block 12 of the movable limiting component 2 and the limiting groove 7 of the precast staircase 5 form a rigid connection. Combined with the positioning of the embedded column 1 and the tightening of the bolts 19, this provides multi-dimensional stable constraint, effectively preventing loosening or displacement of the precast staircase 5 during use and improving structural safety. Furthermore, the reset spring 14 ensures that the movable limiting component 2 is always fully positioned above the embedded column 1 before assembly with the precast staircase 5, preventing the precast staircase 5 from being fitted onto the embedded column 1 and facilitating its smooth installation.

[0015] Specifically, four insertion slots 6 are symmetrically opened at the lower ends of both sides of the precast staircase 5. Two limiting slots 7 are symmetrically opened on the inner wall of the insertion slots 6. The limiting slots 7 are also opened at the upper ends of the precast staircase 5. Four connecting slots 8 are symmetrically opened at the upper ends of both sides of the precast staircase 5. Two receiving slots 9 are symmetrically opened at the upper ends of both sides of the precast staircase 5. The connecting slots 8 are connected to the insertion slots 6 and the receiving slots 9. The inner wall of the receiving slots 9 is provided with threaded blind holes 10. The precast staircase 5 is fitted onto the embedded column 1 through the insertion slots 6. The precast staircase 5 is also installed on two stair beams 4. The upper end of the embedded column 1 is provided with a guide rail groove 11. The cylinder 15 on the fixed extrusion assembly 3 is inserted into the receiving slot 9. The upper end of the cylinder 15 is provided with a storage groove 16. The lower end of the cylinder 15 is provided with a through hole 17. The storage groove 16 and the through hole 17 are interconnected. The extrusion rod 18 is inserted into the connecting groove 8 and the insertion slot 6. The rod 18 is simultaneously inserted between the two limiting blocks 12 on the two moving limiting components 2. The bolt 19 passes through the through hole 17 and is installed in the threaded blind hole 10. The anti-detachment slider 13 on the fixed pressing component 3 is slidably installed in the guide rail groove 11. The return spring 14 is also located in the guide rail groove 11. The limiting block 12 is slidably installed on the upper end of the embedded column 1. The limiting block 12 is stuck in the limiting groove 7 under the pressing of the pressing rod 18. The spacing of the four embedded columns 1 matches the spacing of the four insertion slots 6 to ensure that the prefabricated staircase 5 can be accurately fitted onto the embedded column 1. The length of the two limiting blocks 12 on the two moving limiting components 2 is less than or equal to the length of the embedded column 1 to avoid the limiting block 12 exceeding the embedded column 1 and affecting the installation. When the pressing rod 18 is fully inserted into the connecting groove 8, the limiting block 12 will be inserted into the limiting groove 7 under the pressing of the pressing rod 18 and will make stable contact with the inner wall of the limiting groove 7 to achieve reliable limiting.

[0016] When the prefabricated staircase 5 is fixedly installed on the stair beams 4 using the embedded columns 1, the moving limiting component 2, and the fixing and pressing component 3, it is first necessary to ensure that the four embedded columns 1 are fixedly embedded in the two stair beams 4 according to the specified spacing and position. At this time, under the action of the return spring 14, the limiting block 12 is completely at the upper end of the embedded column 1. Then, the prefabricated staircase 5 is hoisted above the two stair beams 4 using lifting equipment, so that the four insertion slots 6 symmetrically opened on both sides of the lower end of the prefabricated staircase 5 are aligned with the four embedded columns 1 respectively. Then, the prefabricated staircase 5 is slowly lowered so that the four embedded columns 1 are inserted into the corresponding insertion slots 6 respectively. Since the limiting block 12 is completely at the upper end of the embedded column 1, the moving limiting component 2 will also be inserted into the insertion slot 6. Finally, the prefabricated staircase 5 is placed stably on the two stair beams 4, completing the initial connection between the prefabricated staircase 5 and the embedded columns 1. After that, the fixing and pressing component 3 is removed, and then... The cylinder 15 of the fixed extrusion assembly 3 is aligned with the receiving groove 9 on the precast staircase 5, and the extrusion rod 18 is aligned with the connecting groove 8 on the precast staircase 5. Then, the cylinder 15 is inserted into the receiving groove 9, and the extrusion rod 18 is inserted into the connecting groove 8 and the insertion groove 6. It is ensured that the extrusion rod 18 is inserted between the limiting blocks 12 of the two moving limiting assemblies 2. During this process, the extrusion rod 18 will exert a squeezing effect on the limiting blocks 12 on both sides as it moves downward, causing the limiting blocks 12 to slide on the upper end of the embedded column 1. At the same time, it drives the anti-detachment slider 13 to slide in the guide rail groove 11 and compress the reset spring 14 until the limiting block 12 is inserted into the limiting groove 7. Finally, the bolt 19 is passed through the receiving groove 16 and the through hole 17 and screwed into the threaded blind hole 10. At this time, the precast staircase 5 is fixedly installed on the ladder beam 4 through the embedded column 1, the moving limiting assembly 2 and the fixed extrusion assembly 3.

[0017] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A connection structure for a prefabricated staircase, characterized in that: The system includes four embedded columns (1), which are symmetrically and fixedly embedded in two ladder beams (4). A prefabricated staircase (5) is installed on each of the two ladder beams (4). The prefabricated staircase (5) is fitted onto the four embedded columns (1). Two movable limiting components (2) are symmetrically and movably installed on the embedded columns (1). The movable limiting components (2) are located inside the prefabricated staircase (5). The movable limiting components (2) consist of a limiting block (12), an anti-detachment slider (13), and a return spring (14). The anti-detachment slider (13) is fixedly installed. At the lower end of the limiting block (12), the reset spring (14) is fixedly installed on the outer end of the anti-detachment slider (13). Two fixed extrusion assemblies (3) are installed on the prefabricated staircase (5). The fixed extrusion assembly (3) is located between the four movable limiting assemblies (2) on the two pre-embedded columns (1). The fixed extrusion assembly (3) consists of a cylinder (15), an extrusion rod (18), and a bolt (19). There are two extrusion rods (18) that are symmetrically fixedly installed on the outer wall of the cylinder (15). The bolt (19) is movably installed inside the cylinder (15).

2. The connecting structure of the assembled stair according to claim 1, characterized in that: The prefabricated staircase (5) has four symmetrical insertion slots (6) at the lower ends on both sides. Two limiting slots (7) are symmetrically opened on the inner wall of the insertion slots (6). The limiting slots (7) are also opened at the upper end of the prefabricated staircase (5). Four connecting slots (8) are symmetrically opened at the upper ends on both sides of the prefabricated staircase (5). Two receiving slots (9) are symmetrically opened at the upper ends on both sides of the prefabricated staircase (5). The connecting slots (8) are connected to the insertion slots (6) and the receiving slots (9). Threaded blind holes (10) are opened on the inner wall of the receiving slots (9). The prefabricated staircase (5) is fitted onto the embedded column (1) through the insertion slots (6). The prefabricated staircase (5) is also installed on two ladder beams (4).

3. The connecting structure of the assembled stair according to claim 2, characterized in that: The upper end of the pre-embedded column (1) is provided with a guide rail groove (11).

4. The connecting structure of the assembled stair according to claim 3, characterized in that: The cylinder (15) on the fixed extrusion assembly (3) is inserted into the receiving groove (9). The upper end of the cylinder (15) is provided with a receiving groove (16), and the lower end of the cylinder (15) is provided with a through hole (17). The receiving groove (16) and the through hole (17) are interconnected. The extrusion rod (18) is inserted into the connecting groove (8) and the insertion groove (6). The extrusion rod (18) is simultaneously inserted between the two limiting blocks (12) on the two moving limiting assemblies (2). The bolt (19) passes through the through hole (17) and is installed in the threaded blind hole (10).

5. The connecting structure of the assembled stair according to claim 4, characterized in that: The anti-detachment slider (13) on the fixed extrusion assembly (3) is slidably installed in the guide rail groove (11), the reset spring (14) is also located in the guide rail groove (11), the limiting block (12) is slidably installed on the upper end of the pre-embedded column (1), and the limiting block (12) is stuck in the limiting groove (7) under the extrusion of the extrusion rod (18).

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