Prefabricated building stair with connecting node

Abstract

The utility model belongs to building engineering technical field especially is with prefabricated stair for building of connecting node, including prefabricated stair main part, both ends of prefabricated stair main part are fixedly connected with upper end connecting part and lower end connecting part, the prefabricated stair main part is composed of several groups of ladder section unit, two groups of connecting pin shafts are evenly arranged between two adjacent groups of ladder section unit, the inner surface of two groups of ladder section unit is respectively provided with the pin axle assembly hole and pin axle positioning hole that cooperate with connecting pin shaft, one end of connecting pin shaft is fixedly connected with pin axle connector near upper end connecting part, the utility model discloses through modularization splicing, spares the field pouring, shortens the period of construction, reduces the operation intensity, can increase ladder section unit adaptation different span, adjustable height, folding storage of support column, and the lightweight design of ladder section is convenient for hoisting and mounting.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a prefabricated staircase with connecting nodes for building construction. Background Technology

[0002] Buildings are spatial carriers that enable humans to meet their core needs for living, working, and public activities. By constructing fixed and safe enclosure structures, they resist the influence of the external environment, divide functional areas, and provide stable places for production and life. They are the infrastructure for social development and the improvement of quality of life. Prefabricated staircases, as the core components of vertical transportation in buildings, are key structures connecting different floors. In this existing design, the traditional cast-in-place staircase construction process is cumbersome, requiring on-site rebar tying, formwork erection, and concrete pouring. This not only consumes time but also faces the problem of long concrete curing periods, which can easily lead to delays in the overall construction period. Even when early prefabricated staircases are used, they are mostly monolithic or large-section prefabricated. On-site installation still requires secondary pouring to fill gaps, which increases the workload and makes it difficult to guarantee the stability of construction quality due to the large impact of weather on wet work. At the same time, the on-site consumption of labor and materials results in high labor and time costs, which contradicts the goal of high efficiency and low cost pursued by building industrialization. To address this issue, a prefabricated building staircase with connecting nodes is designed. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides a prefabricated building staircase with connecting nodes. This device, through modular assembly, eliminates on-site pouring, shortens the construction period, reduces labor intensity, allows for the addition or removal of stair units to adapt to different spans, features adjustable support columns that can be folded for storage, and incorporates a lightweight staircase design for easy transportation and hoisting.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated staircase for building construction with connecting nodes, comprising a prefabricated staircase body, with an upper connecting part and a lower connecting part fixedly connected to both ends of the prefabricated staircase body, the prefabricated staircase body being composed of several sets of stair segment units, with two sets of connecting pins evenly arranged between two adjacent sets of stair segment units, and pin assembly holes and pin positioning holes respectively opened on the inner surfaces of the two sets of stair segment units, the end of the connecting pin near the upper connecting part being fixedly connected to a pin connector, a connector clearance groove for cooperating with the pin connector being opened on the back of the stair segment unit on the side near the upper connecting part, a threaded hole being opened on the end of the connecting pin away from the pin connector, and a fastening nut for cooperating with the threaded hole being threadedly connected to the end of the connecting pin near the threaded hole.

[0005] As a preferred embodiment of the prefabricated building staircase with connecting nodes of this utility model, nut clearance grooves are symmetrically provided on the surface of the stair section unit on the side away from the upper connecting part.

[0006] As a preferred embodiment of the prefabricated building staircase with connecting nodes of this utility model, the surface of the upper connecting part is evenly provided with three sets of upper connecting holes, and the surface of the lower connecting part is evenly provided with three sets of lower connecting holes.

[0007] As a preferred embodiment of the prefabricated building staircase with connecting nodes according to this utility model, the internal structure of the staircase unit adopts a honeycomb structure.

[0008] As a preferred embodiment of the prefabricated building staircase with connecting nodes according to this utility model, the staircase unit is made of fiber-reinforced composite material and concrete.

[0009] As a preferred embodiment of the prefabricated building staircase with connecting nodes according to this utility model, the lower surface of each staircase unit is symmetrically provided with support components, and the bottom end of each support component is provided with a support base.

[0010] As a preferred embodiment of the prefabricated building staircase with connecting nodes according to this utility model, the support assembly includes a support base fixedly connected to the bottom end of the stair section unit, a support column is provided on the surface of the support base, a connecting shaft is fixedly connected to the top of the support column, a shaft sliding hole that mates with the connecting shaft is opened on the surface of the support base, a column adapter groove that mates with the support column is opened on the surface of the support base, and an L-shaped locking block is fixedly connected to the surface of the support column.

[0011] As a preferred embodiment of the prefabricated building staircase with connecting nodes according to this utility model, the support column is composed of a main support section and several sets of adjustable connecting sections. The top end of the adjustable connecting section is fixedly connected with an adjusting connecting screw. The bottom ends of the main support section and the adjustable connecting section are provided with a main section connecting hole and a connecting section connecting hole that cooperate with the adjusting connecting screw. The surface of the support base is fixedly connected with a base connecting screw that cooperates with the main section connecting hole and the connecting section connecting hole.

[0012] As a preferred embodiment of the prefabricated building staircase with connecting nodes according to this utility model, the bottom end of the support base is fixedly connected with an anti-slip pad.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: the modular stair unit is spliced ​​by connecting pins, eliminating the need for on-site pouring, thus avoiding the problems of construction delays and high labor costs. It can also flexibly add or remove units to adapt to different building spans, avoiding customization waste and on-site cutting damage. The support column can be adjusted in height to adapt to the base layer through adjustable sections, and can also be folded for storage to reduce transportation and storage space. Combined with the lightweight design of the stair honeycomb structure and composite materials, it reduces the difficulty of transportation and hoisting and the building load. During later maintenance, locally damaged parts can be disassembled and replaced individually without overall disassembly, reducing secondary damage to the building and maintenance costs. It comprehensively improves construction efficiency, safety of use and adaptability to various scenarios. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the ladder segment unit in this utility model; Figure 3 This is a schematic diagram of the supporting column in this utility model; Figure 4 This is a schematic diagram of the L-shaped card block in this utility model; In the picture: 1. Precast staircase body; 11. Staircase unit; 12. Connecting pin; 13. Pin assembly hole; 14. Pin positioning hole; 15. Pin connector; 16. Connector clearance groove; 17. Threaded hole; 18. Fastening nut; 19. Nut clearance groove; 2. Upper connecting part; 21. Upper connecting hole; 3. Lower end connecting part; 31. Lower end connecting hole; 4. Support assembly; 41. Support base; 42. Support column; 43. Connecting shaft; 44. Shaft sliding hole; 45. Column adapter groove; 46. L-shaped locking block; 401. Main support section; 402. Adjustable connecting section; 403. Adjustable connecting screw; 404. Main section connecting hole; 405. Connecting section connecting hole; 5. Support base; 51. Base connecting screw; 52. Anti-slip pad. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1 like Figure 1 As shown; A prefabricated building staircase with connecting nodes includes a prefabricated staircase body 1.

[0017] In this implementation plan: In the existing design, the construction process of traditional cast-in-place stairs is cumbersome, requiring on-site rebar tying, formwork erection, and concrete pouring. This not only consumes time but also faces the problem of long concrete curing periods, which can easily lead to delays in the overall construction period. Even when using early prefabricated stairs, they are mostly monolithic or large-section prefabricated, and on-site installation still requires secondary pouring to fill gaps. This increases the workload and makes it difficult to guarantee the stability of construction quality due to the significant impact of weather on wet work. At the same time, the on-site consumption of labor and materials results in high labor and time costs, which contradicts the goal of high efficiency and low cost pursued by industrialized construction. In terms of practical use, this problem is obviously a real and difficult-to-solve issue.

[0018] Furthermore: This application incorporates the aforementioned prior art, such as Figures 1 to 4 As shown: In conjunction with the above content: A prefabricated building staircase with connecting nodes, the two ends of the prefabricated staircase body 1 are respectively fixedly connected to an upper connecting part 2 and a lower connecting part 3. The prefabricated staircase body 1 is composed of several sets of stair segment units 11. Two sets of connecting pins 12 are evenly arranged between two adjacent sets of stair segment units 11. The inner surfaces of the two sets of stair segment units 11 are respectively provided with pin assembly holes 13 and pin positioning holes 14 that cooperate with the connecting pins 12. The end of the connecting pin 12 near the upper connecting part 2 is fixedly connected to a pin connector 15. The back of the stair segment unit 11 near the upper connecting part 2 is provided with a connector clearance groove 16 that cooperates with the pin connector 15. The end of the connecting pin 12 away from the pin connector 15 is provided with a threaded hole 17. The end of the connecting pin 12 near the threaded hole 17 is threadedly connected with a fastening nut 18 that cooperates with the threaded hole 17.

[0019] In this implementation plan: the prefabricated staircase body 1 is the core frame, with upper connecting parts 2 and lower connecting parts 3 fixed at both ends to connect the staircase to the building body. The prefabricated staircase body 1 is composed of several sets of stair segment units 11 spliced ​​together to form a complete staircase. When splicing two adjacent sets of stair segment units 11, the connecting pin 12 is first passed through the pin assembly hole 13 and the pin positioning hole 14 in sequence to complete the initial positioning. The end of the connecting pin 12 near the upper connecting part 2 is provided with a pin connector 15. The pin connector 15 is embedded in the connector clearance groove 16 on the back of the corresponding stair segment unit 11, which prevents the connecting pin 12 from shifting axially and hides the pin connector 15. Within the connector clearance groove 16, the surface of the prefabricated staircase body 1 is made flat. Finally, through the threaded hole 17 at the end of the connecting pin 12 away from the pin connector 15, the fastening nut 18 is screwed in, and the two sets of stair section units 11 are firmly locked by the thread engagement, achieving a loose splicing. The modular splicing design eliminates the need for on-site pouring, significantly shortening the construction cycle and reducing on-site work intensity. At the same time, operators can adjust the total length of the prefabricated staircase body 1 by increasing or decreasing the number of stair section units 11 according to the differences in the horizontal distance between building floors, flexibly adapting to different building structure requirements, improving installation efficiency and construction accuracy, and facilitating disassembly and replacement, which is beneficial for later maintenance and renovation.

[0020] Furthermore: In an optional embodiment, nut clearance grooves 19 are symmetrically provided on the surface of the ladder segment unit 11 on the side away from the upper connecting part 2.

[0021] In this embodiment: when the fastening nut 18 is screwed into the threaded hole 17 of the connecting pin 12, the end of the fastening nut 18 can be embedded in the nut relief groove 19, so as to avoid the fastening nut 18 protruding from the surface of the stair unit 11, avoid the risk of personnel bumping into the exposed fastening nut 18, improve the safety of the staircase, keep the surface of the stair unit 11 flat, and not affect the subsequent decoration or tread laying, thus improving the appearance integrity.

[0022] Furthermore: In an optional embodiment, three sets of upper connecting holes 21 are evenly provided on the surface of the upper connecting part 2, and three sets of lower connecting holes 31 are evenly provided on the surface of the lower connecting part 3.

[0023] In this embodiment: three sets of upper connecting holes 21 are opened on the surface of the upper connecting part 2, and three sets of lower connecting holes 31 are opened on the surface of the lower connecting part 3. During installation, the prefabricated staircase body 1 is fixed in the building by passing the connector through the upper connecting hole 21 and the reserved hole of the upper structure of the building, and through the lower connecting hole 31 and the reserved hole of the lower structure of the building.

[0024] Furthermore: In an optional embodiment, the interior of the ladder segment unit 11 adopts a honeycomb structure.

[0025] In this embodiment, the internal structure of the ladder segment unit 11 adopts a honeycomb structure, which significantly reduces the amount of material used and the self-weight of the ladder segment unit 11 while ensuring the load-bearing strength of the ladder segment unit 11, making it easier to transport and hoist. The distributed stress characteristics of the honeycomb structure can improve the deformation resistance of the ladder segment unit 11 and avoid bending and cracking after long-term use.

[0026] Furthermore: In an optional embodiment, the ladder segment 11 is made of fiber-reinforced composite material combined with concrete.

[0027] In this embodiment, the ladder segment unit 11 is made of fiber-reinforced composite material and concrete. The fiber-reinforced composite material has the characteristics of high strength and high toughness. After being combined with concrete, the fiber-reinforced composite material can disperse the stress inside the concrete and inhibit the generation and propagation of concrete cracks. At the same time, the fiber-reinforced composite material can improve the corrosion resistance and aging resistance of the ladder segment unit 11.

[0028] Furthermore: In an optional embodiment, support components 4 are symmetrically arranged on the lower surface of each ladder segment unit 11, and a support base 5 is provided at the bottom end of the support component 4.

[0029] In this embodiment: During installation, the support base 5 contacts the ground or building base, and the weight of the ladder segment unit 11 is transferred to the base through the support component 4, forming an auxiliary support under the ladder. The symmetrically distributed support component 4 can balance the force on the ladder segment unit 11, reduce the deflection in the middle of the ladder, and improve the overall stability. The support base 5 increases the contact area with the base, preventing the support component 4 from sinking into the base and ensuring the reliability of the support.

[0030] Furthermore: In an optional embodiment, the support assembly 4 includes a support base 41 fixedly connected to the bottom end of the ladder segment unit 11. The surface of the support base 41 is provided with a support column 42. The top end of the support column 42 is fixedly connected to a connecting shaft 43. The surface of the support base 41 is provided with a shaft sliding hole 44 that cooperates with the connecting shaft 43. The surface of the support base 41 is provided with a column adapter groove 45 that cooperates with the support column 42. An L-shaped locking block 46 is fixedly connected to the surface of the support column 42.

[0031] In this embodiment: Installation requires manual rotation of the support column 42 first. Once the support column 42 and the support base 41 are aligned on the same axis, the support column 42 is pushed along the direction of the column adapter groove 45. The support column 42 drives the connecting shaft 43, fixed at its top, to slide linearly along the shaft sliding hole 44 on the surface of the support base 41. Simultaneously, the L-shaped locking block 46 fixed on the surface of the support column 42 moves synchronously with the support column 42. When the connecting shaft 43 slides to the preset position of the shaft sliding hole 44, the bent end of the L-shaped locking block 46 is precisely locked onto the surface of the support base 41. At this point, the support column 42 is limited by the L-shaped locking block 46 and cannot rotate, thus locking the support column 42. The support assembly 4 enters a stable support state. During removal, the support column 42 is moved along the shaft sliding hole... 44 pulls the support column 42 in the opposite direction, and the support column 42 drives the connecting shaft 43 to slide linearly in the opposite direction along the shaft sliding hole 44. At the same time, the support column 42 drives the L-shaped locking block 46 to move synchronously, so that the bent end of the L-shaped locking block 46 is separated from the surface of the support base 41, and the limiting lock on the support column 42 is released. After the L-shaped locking block 46 is completely separated from the support base 41, the connecting shaft 43 is still retained in the shaft sliding hole 44. At this time, the support column 42 can be rotated around the axis of the connecting shaft 43. The support column 42 rotates within the allowable range of the shaft sliding hole 44 with the connecting shaft 43 as the rotation center until the support column 42 is parallel or attached to the lower surface of the ladder segment unit 11, realizing the folding of the ladder segment unit 11 and the support assembly 4, which facilitates subsequent transportation.

[0032] Furthermore: In an optional embodiment, the support column 42 consists of a main support section 401 and several sets of adjustable connecting sections 402. The top end of the adjustable connecting section 402 is fixedly connected to an adjusting connecting screw 403. The bottom ends of the main support section 401 and the adjustable connecting section 402 are provided with a main section connecting hole 404 and a connecting section connecting hole 405 that cooperate with the adjusting connecting screw 403. The surface of the support base 5 is fixedly connected with a base connecting screw 51 that cooperates with the main section connecting hole 404 and the connecting section connecting hole 405.

[0033] In this embodiment, the support column 42 consists of a main support section 401 and several sets of adjustable connecting sections 402. The number of adjustable connecting sections 402 can be increased or decreased according to the height requirements of the ladder. Each adjustable connecting section 402 has an adjustable connecting screw 403 at its top. During assembly, the adjustable connecting screw 403 is screwed into the main section connecting hole 404 at the bottom of the main support section 401, or the connecting section connecting hole 405 at the bottom of another set of adjustable connecting sections 402. The main support section 401 and the adjustable connecting section 402 are fixed through threaded engagement. The base connecting screw 51 on the surface of the support base 5 can be screwed into the connecting hole of the main support section 401 or the lowest adjustable connecting section 402 to fix the support column 42 to the support base 5, forming a complete support link. The height of the support column 42 can be flexibly adjusted by increasing or decreasing the number of adjustable connecting sections 402, adapting to different floor heights and base flatness scenarios, thus improving versatility.

[0034] Furthermore: In an optional embodiment, an anti-slip pad 52 is fixedly connected to the bottom end of the support base 5.

[0035] In this embodiment: After installation, the anti-slip mat 52 is in close contact with the ground or base layer. By increasing the friction between the support base 5 and the base layer, the horizontal sliding of the support base 5 is restricted, effectively preventing the support base 5 from sliding when subjected to force or when people walk on it, avoiding displacement of the ladder and improving safety in use.

[0036] Working principle: First, hoist the two sets of stair section units 11 to the installation position, aligning the splicing surfaces of adjacent sets of stair section units 11. Then, pick up the connecting pin 12, align the end of the connecting pin 12 near the pin connector 15 with the pin assembly hole 13 of one set of stair section units 11, and push the connecting pin 12 through the pin assembly hole 13. Continue inserting it into the pin positioning hole 14 of the other set of stair section units 11 until the pin connector 15 of the connecting pin 12 is embedded in the connector clearance groove 16 on the back of the stair section unit 11 near the upper connection part 2. At this point, the two sets of stair section units 11 are initially positioned. The connecting pin 12 cannot be axially offset due to the fit between the pin connector 15 and the connector clearance groove 16. Take the fastening nut 18 and tighten it. Align the threaded hole 17 at the end of the connecting pin 12 furthest from the pin connector 15, and rotate the fastening nut 18 clockwise. The fastening nut 18 moves along the threaded section of the connecting pin 12 through thread engagement until its end is embedded in the nut clearance groove 19 on the surface of the stair unit 11. At this point, the two sets of stair units 11 are firmly locked by the connecting pin 12 and the fastening nut 18, with no loosening. Repeat the above steps, increasing or decreasing the number of stair units 11 according to the horizontal distance between building floors, until the prefabricated staircase body 1 is assembled. After the prefabricated staircase body 1 is assembled, adjust the overall position of the staircase so that the upper connecting part 2 and the lower connecting part 3 at both ends of the prefabricated staircase body 1 are respectively aligned with the reserved mating surfaces of the upper and lower floors of the building structure. Then, install the connecting parts. Insert the prefabricated staircase body 1 into the pre-drilled hole of the upper structure of the building by passing through the upper connecting hole 21 on the surface of the upper connecting part 2. At the same time, insert another set of connectors into the pre-drilled hole of the lower structure of the building by passing through the lower connecting hole 31 on the surface of the lower connecting part 3. Tighten the connectors to fix the prefabricated staircase body 1 to the building body and complete the overall positioning. Then, manually rotate the folded support column 42 so that the support column 42 rotates around the connecting shaft 43 in the shaft sliding hole 44 until the axis of the support column 42 is aligned with the axis of the column adapter groove 45 of the support seat 41. Then, push the support column 42 along the direction of the column adapter groove 45. The support column 42 drives the connecting shaft 43 at the top to slide linearly along the shaft sliding hole 44 of the support seat 41. At the same time, the L-shaped locking block 46 on the surface of the support column 42 moves with the support column. 42 moves synchronously. When the connecting shaft 43 slides to the preset position of the shaft sliding hole 44, the bent end of the L-shaped locking block 46 is precisely locked onto the surface of the support base 41, restricting the reverse sliding of the support column 42 and completing the locking of the support column 42. If there is a difference in the height of the base layer, the height of the support column 42 needs to be adjusted. First, align the adjusting connecting screw 403 at the top of the adjusting connecting section 402 with the main section connecting hole 404 at the bottom of the main support section 401. Rotate the adjusting connecting section 402 clockwise so that the adjusting connecting screw 403 is screwed into the main section connecting hole 404 through thread engagement, thereby fixing the main support section 401 and the adjusting connecting section 402. Multiple sets of adjusting connecting sections 402 can be added as needed. The splicing is achieved by adjusting the thread engagement between the adjusting connecting screw 403 and the connecting hole 405 of the connecting section.Finally, align the base connecting screw 51 on the surface of the support base 5 with the connecting hole of the lowest adjusting connecting section 402, and rotate the support base 5 clockwise until the base connecting screw 51 is screwed into the connecting hole, until the anti-slip pad 52 at the bottom of the support base 5 is in close contact with the ground base, thus completing the height adjustment and fixing of the support assembly 4.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A prefabricated building staircase with connecting nodes, comprising a prefabricated staircase body (1), characterized in that: The prefabricated staircase body (1) is fixedly connected to an upper connecting part (2) and a lower connecting part (3) at both ends. The prefabricated staircase body (1) is composed of several sets of stair segment units (11). Two sets of connecting pins (12) are evenly arranged between two adjacent sets of stair segment units (11). The inner surfaces of the two sets of stair segment units (11) are respectively provided with pin assembly holes (13) and pin positioning holes (14) that cooperate with the connecting pins (12). The connecting pins (12) are close to the upper end. One end of the connecting part (2) is fixedly connected to a pin connector (15). The back of the ladder unit (11) near the upper connecting part (2) is provided with a connector clearance groove (16) that cooperates with the pin connector (15). The end of the connecting pin (12) away from the pin connector (15) is provided with a threaded hole (17). The end of the connecting pin (12) near the threaded hole (17) is threaded with a fastening nut (18) that cooperates with the threaded hole (17).

2. A prefabricated building staircase with connecting nodes according to claim 1, characterized in that: Nut clearance grooves (19) are symmetrically provided on the surface of the ladder segment unit (11) on the side away from the upper connecting part (2).

3. A prefabricated building staircase with connecting nodes according to claim 1, characterized in that: The surface of the upper connecting part (2) is evenly provided with three sets of upper connecting holes (21), and the surface of the lower connecting part (3) is evenly provided with three sets of lower connecting holes (31).

4. A prefabricated building staircase with connecting nodes according to claim 1, characterized in that: The ladder segment unit (11) has a honeycomb structure inside.

5. A prefabricated building staircase with connecting nodes according to claim 1, characterized in that: The ladder unit (11) is made of fiber-reinforced composite material and concrete.

6. A prefabricated building staircase with connecting nodes according to claim 1, characterized in that: Each of the ladder segment units (11) has a support component (4) symmetrically arranged on its lower surface, and a support base (5) is provided at the bottom of the support component (4).

7. A prefabricated building staircase with connecting nodes according to claim 6, characterized in that: The support assembly (4) includes a support base (41) fixedly connected to the bottom end of the ladder unit (11). The surface of the support base (41) is provided with a support column (42). The top end of the support column (42) is fixedly connected with a connecting shaft (43). The surface of the support base (41) is provided with a shaft sliding hole (44) that cooperates with the connecting shaft (43). The surface of the support base (41) is provided with a column adapter groove (45) that cooperates with the support column (42). The surface of the support column (42) is fixedly connected with an L-shaped locking block (46).

8. A prefabricated building staircase with connecting nodes according to claim 7, characterized in that: The support column (42) consists of a main support section (401) and several sets of adjustable connecting sections (402). The top end of the adjustable connecting section (402) is fixedly connected with an adjusting connecting screw (403). The bottom ends of the main support section (401) and the adjustable connecting section (402) are provided with a main section connecting hole (404) and a connecting section connecting hole (405) that cooperate with the adjusting connecting screw (403). The surface of the support base (5) is fixedly connected with a base connecting screw (51) that cooperates with the main section connecting hole (404) and the connecting section connecting hole (405).

9. A prefabricated building staircase with connecting nodes according to claim 8, characterized in that: The bottom end of the support base (5) is fixedly connected to an anti-slip pad (52).

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