Prefabricated building construction scissors type stairwell protection steel stair

Abstract

The utility model relates to the technical field of assembly type building construction stairway protection, disclose a kind of assembly type building construction scissor stairway protection steel stair, including vertically arranged lower platform column, upper platform column and support column, and the first inclined rod, second inclined rod, step side beam, first protection rod and second protection rod are detachably connected between lower platform column and upper platform column, the utility model can be completed simultaneously by innovative design, the installation of protection steel stair and protection structure can be completed, the time of high-altitude operation surface exposure is reduced, the risk of falling is effectively reduced;The connection mode of protection structure is optimized, the need of artificial point-by-point connection is reduced, thereby the efficiency of protection structure erection is improved, a large amount of labor cost is saved, the demand of many people cooperation is greatly reduced by structural improvement design, and labor intensity and labor cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of protective technology for stairwells in prefabricated building construction, and in particular to a scissor-type protective steel staircase for prefabricated building construction. Background Technology

[0002] In the field of prefabricated building construction, the safety of passageways and the risks of working at heights during the staggered installation of prefabricated staircases in stairwells have become a major concern for construction companies. Currently, the industry generally adopts a solution of using standardized steel ladders combined with steel pipe edge protection to address these potential hazards. However, this solution still faces the following systemic technical bottlenecks:

[0003] 1. The installation of steel ladders and protective structures (such as edge railings) need to be carried out in stages. The protective facilities cannot be completed at the same time as the ladder, which leads to a longer exposure time of the high-altitude working surface and an increased risk of falling. The connection and dismantling of steel pipe fastener protective structure nodes rely on manual point-by-point work, which reduces the efficiency of protective erection and dismantling.

[0004] 2. The installation, erection, and dismantling of steel ladders require the cooperation of multiple people, resulting in high labor costs;

[0005] 3. Idle periods occupy a large amount of site space; frequent cross-project transfers and transportation increase transportation costs.

[0006] Especially for scissor-type stairwells, the standardized steel staircases are larger in size and have greater height differences, making the aforementioned bottlenecks more prominent. This makes construction companies hesitant to proceed, and they may even regress to using steel pipes for the facade and planar protection of the stairwell, further reducing installation and dismantling efficiency and increasing the cost of protective erection and dismantling as well as the cost of cross-project transfer. Utility Model Content

[0007] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a scissor-type protective steel staircase for prefabricated building construction.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A scissor-type protective steel staircase for prefabricated building construction includes vertically arranged lower platform columns, upper platform columns, and supporting columns. The lower and upper platform columns are detachably connected by a first diagonal brace, a second diagonal brace, a step side beam, a first guardrail, and a second guardrail. The first diagonal brace, step side beam, first guardrail, and second guardrail are arranged parallel from bottom to top. The two ends of the step side beam are located on the sides of a second and third resting platform, respectively. Step structures are provided on the step side beam. A first reinforcing component and a second reinforcing component are provided on each of the lower platform columns, upper platform columns, and supporting columns. Platform side beams and platform beams are detachably installed on the tops of the lower platform columns and supporting columns, and the platform body is installed on the tops of the platform side beams and platform beams.

[0010] Preferably, the number of the first diagonal brace, the second diagonal brace, the step side beam, the first guard rod, the second guard rod, the lower platform column, the upper platform column, and the support column are all two.

[0011] Preferably, the step structure is disposed on the side where the two step side beams are close to each other.

[0012] Preferably, the first reinforcement component includes two first vertical bars, and a first horizontal bar is connected between the two first vertical bars.

[0013] Preferably, the second reinforcing component has a U-shaped structure, and includes two parallel second horizontal bars and two vertically arranged second vertical bars, with the second horizontal bars and second vertical bars being perpendicular to each other.

[0014] Preferably, the step structure includes a tail steel step assembly and several steel step assemblies. The steel step assembly includes a first platform plate, and kick plates and first buckle plates are respectively connected to the two sides of the first platform plate. The first platform plate is connected to the step side beam.

[0015] Preferably, the tail steel step assembly includes a second platform plate and a second fastener plate, the second fastener plate being located on the side of the second platform plate, and the second platform plate being connected to the step side beam.

[0016] Preferably, both the lower platform column and the upper platform column are provided with lifting rings on their outer tops, and both the lower platform column and the upper platform column are provided with pads at their bottoms.

[0017] Preferably, the platform side beam and the platform beam are welded together.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. Improve the synchronization of installation and protection: Through innovative design, the installation of protective steel stairs and the protective structure can be completed simultaneously, reducing the time the working surface is exposed at height and effectively reducing the risk of falls.

[0020] 2. Improved erection efficiency: The optimized connection method of the protective structure reduces the need for manual point-to-point connection, thereby improving the efficiency of the protective structure erection and saving a lot of labor costs.

[0021] 3. Reduced need for manual collaboration: Structural improvements in the design significantly reduce the need for multi-person collaboration, thereby lowering labor intensity and labor costs.

[0022] 4. Saves space and transportation costs: The design occupies less space and adopts a standardized modular design, which reduces the frequency of cross-project transfers and thus reduces transportation costs.

[0023] 5. Strong applicability of scissor-type staircases: It is particularly suitable for the construction environment of scissor-type staircases. Through precise size and height difference matching, the steel staircase platform can effectively solve the problems of large volume and large height difference of standardized steel staircases.

[0024] 6. Enhanced structural stiffness and stability: Through the design of reasonable reinforcement components and step structure, the overall planar stiffness of the steel staircase is improved, ensuring long-term reliability. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of a protective steel staircase for a scissor-type stairwell in a prefabricated building construction.

[0026] Figure 2 This is a structural schematic diagram of the first reinforcing component in a scissor-type protective steel staircase for prefabricated building construction.

[0027] Figure 3 This is a structural schematic diagram of the second reinforcing component in a scissor-type protective steel staircase for prefabricated building construction.

[0028] Figure 4 This is a schematic diagram of the tread structure and tread side beams in a scissor-type staircase protective steel staircase used in prefabricated building construction.

[0029] Figure 5 This is a structural schematic diagram of the steel step assembly in a scissor-type staircase protective steel staircase used in prefabricated building construction.

[0030] Figure 6 This is a structural schematic diagram of the tail steel step assembly in a scissor-type staircase protective steel staircase used in prefabricated building construction.

[0031] Figure 7This is a frontal view of the plan view of a protective steel staircase for a scissor-type stairwell in a prefabricated building construction.

[0032] Figure 8 This is a structural diagram of the platform side beams and platform body of a scissor-type protective steel staircase in a prefabricated building construction.

[0033] Figure 9 This is a schematic diagram of the assembly structure of the platform side beam and platform body of a protective steel staircase for a scissor-type stairwell in a prefabricated building construction.

[0034] In the diagram: 101, First precast staircase; 102, Second precast staircase; 11, Lower platform column; 12, Upper platform column; 21, First diagonal brace; 22, Second diagonal brace; 23, Step side beam; 24, First guardrail; 25, Second guardrail; 3, First reinforcing component; 31, First horizontal bar; 32, First vertical bar; 4, Second reinforcing component; 41, Second horizontal bar; 42, Second vertical bar; 5, Step structure; 51, Steel step assembly; 511, First platform plate; 512, Kickboard; 513, First snap-on plate; 52, Tail-end steel step assembly; 521, Second platform plate; 522, Second snap-on plate; 61, Support column; 62, Platform side beam; 63, Platform body; 64, Platform beam; 7, Lifting ring; 91, First rest platform; 92, Second rest platform; 93, Third rest platform; 94, Fourth rest platform. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] Reference Figures 1 to 9A type of protective steel staircase for scissor-type stairwells in prefabricated buildings includes vertically arranged lower platform columns 11, upper platform columns 12, and supporting columns 61. The lower platform columns 11 and upper platform columns 12 are detachably connected by a first diagonal brace 21, a second diagonal brace 22, a step side beam 23, a first protective rod 24, and a second protective rod 25. The first diagonal brace 21, step side beam 23, first protective rod 24, and second protective rod 25 are arranged in parallel from bottom to top. The two ends of the step side beam 23 are respectively located at... The sides of the second rest platform 92 and the third rest platform 93; the step structure 5 is provided on the step side beam 23; the first reinforcing component 3 and the second reinforcing component 4 are provided on the lower platform column 11, the upper platform column 12 and the supporting column 61; the platform side beam 62 and the platform beam 64 are detachably installed on the top of the lower platform column 11 and the supporting column 61, the platform side beam 62 and the platform beam 64 are welded together, and the top of the platform side beam 62 and the platform beam 64 jointly support the installation of the platform body 63.

[0037] The lower platform column 11, the upper platform column 12, and the supporting column 61 form the basic frame of the steel staircase. The lower platform column 11 and the upper platform column 12 are stably connected by a detachable connection structure.

[0038] The first diagonal brace 21 and the second diagonal brace 22 are respectively installed between the lower platform column and the upper platform column to provide stability for the overall structure.

[0039] The step side beam 23 is installed between the first diagonal bar 21 and the first guard bar 24 to provide horizontal support and is adapted to the height difference between the platforms of the staircase.

[0040] The first guardrail 24 and the second guardrail 25 are arranged parallel to the side beam of the step 23 to ensure the safety of the stair area.

[0041] The side beam 23 is designed to connect its two ends to the sides of the second rest platform 92 and the third rest platform 93 respectively, ensuring that a continuous protective structure is formed between the multiple rest platforms in the stairwell. The side beam 23 is also equipped with a step structure 5 to provide a safe passageway.

[0042] The first reinforcing component 3 and the second reinforcing component 4 are used to enhance the stability of the columns and ensure the safety and structural rigidity of the entire steel staircase platform.

[0043] In a preferred embodiment of this utility model, the number of the first diagonal bar 21, the second diagonal bar 22, the step side beam 23, the first protective bar 24, the second protective bar 25, the lower platform column 11, the upper platform column 12, and the support column 61 are all two.

[0044] In a preferred embodiment of the present invention, the step structure 5 is disposed on the side of the two step side beams 23 that are close to each other.

[0045] In a preferred embodiment of this utility model, the vertical spacing between adjacent step side beams 23, the first protective rod 24, and the second protective rod 25 is 600 mm. This 600 mm spacing is a commonly used vertical spacing parameter for protective structures in the construction field, effectively preventing people from crossing or falling during passage or operation, and meeting the requirements of relevant safety regulations such as the "Technical Specification for Safety of Construction Edge Operations". The uniform vertical spacing ensures consistency between the pre-set connection holes of the step side beams and the protective rods, facilitating standardized processing and rapid assembly of components, and improving factory prefabrication efficiency and on-site assembly efficiency. In the steel structure platform, the protective rods not only provide protection but also contribute to the overall frame stability as auxiliary connecting members. Maintaining a uniform spacing allows the members to form a regular distribution under stress, thereby optimizing the force path and stiffness response of the entire platform under load.

[0046] In a preferred embodiment of this utility model, the bolt holes at both ends of the step side beam 23 are coaxial with the circular bolt holes on the lower platform column 11 and the upper platform column 12 that are closest to the height of the template of the second rest platform 92 and the third rest platform 93 of the stairs.

[0047] In a preferred embodiment of this utility model, the support column 61 is detachably connected to the first diagonal bar 21, the second diagonal bar 22, the step side beam 23, the first protective bar 24, and the second protective bar 25.

[0048] In a preferred embodiment of this utility model, the lower platform column 11, the upper platform column 12, the first diagonal brace 21, the second diagonal brace 22, the step side beam 23, the first protective rod 24, the second protective rod 25, the support column 61, and the platform side beam 62 are all steel components. Furthermore, the surfaces of the lower platform column 11, the upper platform column 12, the first diagonal brace 21, the second diagonal brace 22, the step side beam 23, the first protective rod 24, the second protective rod 25, the support column 61, and the platform side beam 62 are all provided with a plurality of circular bolt holes with a diameter of 18 mm, and the axial distance between two adjacent circular bolt holes is 100 mm.

[0049] In a preferred embodiment of this utility model, the two farthest circular bolt holes on the surface of the first diagonal brace 21 are coaxially connected to the second circular bolt holes from low to high on the surfaces of the lower platform column 11 and the upper platform column 12, respectively. This connection method ensures that the first diagonal brace forms a stable diagonal support during installation, which helps to improve the lateral stiffness and diagonal stability of the overall staircase structure. The two farthest circular bolt holes on the surface of the second diagonal brace 22 are coaxially connected to the second circular bolt hole from low to high on the surface of the upper platform column 12 and the first circular bolt hole from top to bottom on the surface of the lower platform column 11, respectively. This asymmetrical connection layout forms a complementary support with the first diagonal brace, so that the two diagonal braces form an isosceles triangular diagonal structural unit between the columns, thereby enhancing the stability support capacity of the staircase platform in both longitudinal and lateral directions.

[0050] In a preferred embodiment of this utility model, after the first diagonal brace 21 and the second diagonal brace 22 are both installed on the lower platform column 11 and the upper platform column 12, an isosceles triangle structure is formed between the second diagonal brace 22, the first diagonal brace 21, and the lower platform column 11. This structure has significant advantages in terms of spatial stability and force symmetry. Specifically, the circular bolt holes of the first diagonal brace 21 and the second diagonal brace 22 at one end of the first rest platform 91 of the staircase are coaxially bolted to the second circular bolt hole on the surface of the upper platform column 12 from low to high, respectively, and are located on both sides of the upper platform column, constructing a double diagonal brace structure with symmetrical left and right arrangement. This design not only optimizes the force distribution of the upper platform column, but also improves the stability of the diagonal brace anchorage, and is also located on both sides of the upper platform column 12.

[0051] The other ends of the second diagonal brace 22 and the first diagonal brace 21 are connected to different positions on the lower platform column 11. By reasonably selecting the bolt hole positions, the second diagonal brace 22, the first diagonal brace 21, and the lower platform column 11 form an isosceles triangle. This geometric structure can significantly improve the steel stair platform's ability to resist lateral shear force and vertical loads, effectively preventing the platform structure from experiencing instability risks such as tilting, torsion, or subsidence.

[0052] This steel ladder platform is mainly suitable for construction platforms of scissor stairwells in prefabricated residential and apartment buildings with a floor height of 2900 mm-3000 mm, and its application environment includes... Figure 7 As shown, the steel ladder platform is placed on the first prefabricated staircase 101 and the second prefabricated staircase 102, and the two sides of the entire steel ladder platform correspond to the first rest platform 91, the third rest platform 93, the second rest platform 92, and the fourth rest platform 94, respectively.

[0053] By setting several platform side beams 62 on the support column 61 and the first reinforcement component 3, horizontal protection of the stair plane opening can be formed. In addition, the vertical distance between the top surface of the end of the platform side beam 62 facing the upper platform column 12 and the step structure 5 directly below it is less than 1.8 meters. The purpose is to reduce the height of the platform composed of the platform side beams 62.

[0054] It is understandable that the coaxial connection method mentioned in the above scheme refers to aligning the designated circular bolt holes on the two components, inserting a bolt with a diameter that matches the circular bolt hole into the circular bolt hole, and then putting a fastening nut on the bolt and tightening it, thereby firmly connecting the two components together in a coaxial manner.

[0055] By using several square tubes with 18 mm diameter holes and 100 mm spacing to construct the steel staircase platform, those skilled in the art, through continuous dimensional adjustments and optimizations, discovered that the bolt holes at the joints of each member are perfectly coaxial, while also matching the dimensions and height differences of the stairwell. This achieves precise structural alignment and overall functionality. If any of these conditions—coaxiality of the bolt holes, stairwell dimensions, or height differences—are not met, the designed steel staircase platform cannot be successfully constructed. This method ensures the structural integrity and stability of the platform. Furthermore, using bolted connections for assembling the members also improves the ease of overall assembly of the steel staircase platform.

[0056] In a preferred embodiment of the present invention, the first reinforcing component 3 includes two first vertical rods 32, and a first horizontal rod 31 is connected between the two first vertical rods 32.

[0057] In a preferred embodiment of the present invention, the second reinforcing component 4 has a U-shaped structure. The second reinforcing component 4 includes two parallel second horizontal bars 41 and two vertically arranged second vertical bars 42, which are arranged perpendicular to each other.

[0058] The first horizontal bar 31, the first vertical bar 32, the second horizontal bar 41, and the second vertical bar 42 are all provided with several circular bolt holes with a diameter of 18 mm and a axial spacing of 100 mm.

[0059] It is understandable that by setting the first reinforcing component 3 and the second reinforcing component 4 on the lower platform column 11, the upper platform column 12, and the support column 61, the lateral stiffness of the lower platform column 11, the upper platform column 12, and the support column 61 can be enhanced.

[0060] In a preferred embodiment of this utility model, the step structure 5 includes a tail steel step assembly 52 and several steel step assemblies 51. The steel step assembly 51 includes a first platform plate 511. The two sides of the first platform plate 511 are respectively connected to a kick plate 512 and a first buckle plate 513. The kick plate 512 is used to prevent the toes from slipping off the edge of the platform. The first buckle plate 513 is a connection structure that overlaps with the adjacent steel step assembly 51. The first platform plate 511 is connected to the step side beam 23. The tail steel step assembly 52 is set at the end of the step structure 5 to realize the closing and connection transition of high and low steps. The tail steel step assembly 52 includes a second platform plate 521 and a second buckle plate 522. The second buckle plate 522 is located on the side of the second platform plate 521. The second platform plate 521 is connected to the step side beam 23.

[0061] The first fastener plate 513 on the first platform plate 511 located at the higher position fastens to the kick plate 512 of the first platform plate 511 located at the lower position, and the second fastener plate 522 on the second platform plate 521 fastens to the kick plate 512 of the first platform plate 511 located at the highest position.

[0062] The steel step assembly 51 and the tail steel step 52 are made of steel plate bent in one piece, which simplifies the processing process and reduces manufacturing errors. The steel step assembly 51 is connected to the tail steel step assembly 52 and the steel step assembly 51 by welding. In addition, the steel step assembly 51 and the tail steel step assembly 52 are welded to the step side beam 23 to enhance the planar rigidity of the body and ensure that the structure does not deform, loosen or break under repeated stepping and load.

[0063] In a preferred embodiment of the present invention, a lifting ring 7 is provided on the top of the outer side of both the lower platform column 11 and the upper platform column 12, and a pad is provided at the bottom of both the lower platform column 11 and the upper platform column 12.

[0064] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A protective steel staircase for scissor-type stairwells in prefabricated building construction, characterized in that, It includes a vertically arranged lower platform column (11), upper platform column (12) and support column (61). The lower platform column (11) and upper platform column (12) are detachably connected by a first diagonal bar (21), a second diagonal bar (22), a step side beam (23), a first guard bar (24) and a second guard bar (25). The first diagonal bar (21), the step side beam (23), the first guard bar (24) and the second guard bar (25) are arranged in parallel from bottom to top. The two ends of the step side beam (23) are located on the sides of the second rest platform (92) and the third rest platform (93) respectively. The step side beam (23) is provided with a step structure (5); The lower platform column (11), the upper platform column (12) and the support column (61) are each provided with a first reinforcement component (3) and a second reinforcement component (4). The lower platform column (11) and the support column (61) are detachably equipped with a platform side beam (62) and a platform beam (64). The platform body (63) is installed on the top of the platform side beam (62) and the platform beam (64).

2. The scissor-type protective steel staircase for prefabricated building construction according to claim 1, characterized in that, The number of the first diagonal bar (21), the second diagonal bar (22), the step side beam (23), the first guard bar (24), the second guard bar (25), the lower platform column (11), the upper platform column (12), and the support column (61) are all two.

3. A scissor-type protective steel staircase for prefabricated building construction according to claim 2, characterized in that, The step structure (5) is located on the sides of the two step side beams (23) that are close to each other.

4. A scissor-type protective steel staircase for prefabricated building construction according to claim 1, characterized in that, The first reinforcement component (3) includes two first vertical bars (32), and a first horizontal bar (31) is connected between the two first vertical bars (32).

5. A scissor-type protective steel staircase for prefabricated building construction according to claim 1, characterized in that, The second reinforcing component (4) has a U-shaped structure. The second reinforcing component (4) includes two parallel second horizontal bars (41) and two vertically arranged second vertical bars (42). The second horizontal bars (41) and the second vertical bars (42) are arranged perpendicular to each other.

6. A scissor-type protective steel staircase for prefabricated building construction according to claim 1, characterized in that, The step structure (5) includes a tail steel step assembly (52) and several steel step assemblies (51). The steel step assembly (51) includes a first platform plate (511). The two sides of the first platform plate (511) are respectively connected to a kick plate (512) and a first buckle plate (513). The first platform plate (511) is connected to the step side beam (23).

7. A scissor-type protective steel staircase for prefabricated building construction according to claim 6, characterized in that, The tail steel step assembly (52) includes a second platform plate (521) and a second fastener plate (522), the second fastener plate (522) being located on the side of the second platform plate (521), and the second platform plate (521) being connected to the step side beam (23).

8. A protective steel staircase for scissor-type stairwells in prefabricated building construction according to claim 1, characterized in that, The top of the outer side of both the lower platform column (11) and the upper platform column (12) is provided with a lifting ring (7).

9. A protective steel staircase for scissor-type stairwells in prefabricated building construction according to claim 1, characterized in that, The platform side beam (62) and platform beam (64) are welded together.

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