Steel structure stair formwork facilitating installation of steps

Abstract

This utility model discloses a steel structure staircase formwork that facilitates the installation of steps. It includes a staircase body with side panels and railings on both sides. Several bottom formwork steps are provided on the staircase body, with both ends of the bottom formwork fixedly connected to the side panels. A step formwork is provided between two adjacent bottom formwork steps, and the step formwork is detachably connected to its corresponding bottom formwork. A jacking component corresponding to the step formwork is provided on the staircase body. This utility model addresses the pain points of traditional staircase structures by proposing a steel structure staircase formwork that facilitates step installation. The bottom formwork and step formwork are fixedly connected with connecting bolts and jacked by the jacking component, ensuring that the tread height, width, and levelness of each step meet design requirements. This avoids quality problems such as inconsistent step dimensions and uneven surfaces caused by manual measurement and installation errors, thereby improving the overall construction quality and aesthetics of the staircase.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a steel structure staircase formwork. Background Technology

[0002] In modern construction engineering, steel structures are widely used in various public buildings, industrial plants, and large facilities due to their advantages such as high strength, light weight, and fast construction speed. As a crucial vertical transportation component connecting different levels within a building, the design and construction quality of staircases are paramount. Currently, the treads (steps) of steel structure staircases are mostly made of cast concrete to ensure rigidity and user comfort, which requires the installation of formwork on the steel structure stair beams. However, under existing construction techniques, the installation of formwork for steel structure staircase steps has several drawbacks: 1. Large on-site processing volume and low efficiency: Traditional methods often use loosely assembled wooden formwork or ordinary small steel formwork. Construction workers need to conduct a lot of measurement, cutting and trial assembly work on-site according to the slope and step size of the stairs. This process is not only tedious, but also requires a high level of technical skills from the workers, resulting in extremely low construction efficiency and seriously affecting the overall construction progress.

[0003] 2. Positioning accuracy is difficult to guarantee, and quality fluctuates greatly: The uniformity of the riser height and width of the steps is a key indicator for measuring the construction quality of stairs. Relying on manual measurement and fixing is very easy to generate cumulative errors, resulting in inconsistent heights of adjacent steps and phenomena such as "scissor steps". This not only affects the aesthetics, but also poses a safety hazard and can easily cause users to trip.

[0004] 3. Difficulty in reinforcement and support, prone to deformation and grout leakage: Steel structure stair formwork is usually in a suspended or inclined state, with poor support and reinforcement conditions. The support system of traditional formwork is often temporarily erected and lacks effective and reliable connection with the steel structure. During concrete pouring, it is easily subjected to impact and lateral pressure, resulting in deformation, displacement or even formwork bursting, leading to quality problems such as concrete structure dimensional deviation, grout leakage, and honeycomb pitting on the surface.

[0005] 4. Poor versatility and low turnover rate: Templates customized for specific staircases are often difficult to apply to other projects, resulting in a large waste of materials, increasing project costs, and not conforming to the concept of green construction.

[0006] In summary, current staircase construction suffers from problems such as large processing volume, low efficiency, large fluctuations in construction quality, and poor versatility. Utility Model Content

[0007] To address the shortcomings in the aforementioned background technology, this utility model proposes a steel structure staircase template that facilitates the installation of steps, thereby solving the above-mentioned technical problems.

[0008] The technical solution of this utility model is achieved as follows: A steel structure staircase formwork for easy installation of steps includes a staircase body, side plates and railings on both sides of the staircase body, and several bottom staircase formworks on the staircase body. The two ends of the bottom staircase formworks are fixedly connected to the side plates. A step formwork is provided between two adjacent bottom staircase formworks, and the step formwork is detachably connected to the corresponding bottom staircase formwork. A jacking component corresponding to the step formwork is provided on the staircase body. The detachable connection between the step formwork and the corresponding bottom staircase formwork allows for the reuse of the step formwork; this significantly reduces on-site construction complexity and improves installation efficiency, making it particularly suitable for batch or repetitive construction scenarios. The jacking component actively pushes and positions the step formwork during installation, ensuring a tight fit between the formwork and the bottom plate, effectively preventing misalignment, grout leakage, or bulging during concrete pouring, thus improving molding quality. If a step formwork is damaged, it can be disassembled and replaced individually without dismantling adjacent formwork or the entire structure, reducing downtime and maintenance costs, and extending the service life of the entire system.

[0009] Further optimized, the staircase body is equipped with a support frame that spans across several steps of the bottom formwork. Several jacking components are located at the bottom of the support frame, each corresponding to a step formwork. By centrally mounting the jacking components on a single support frame spanning multiple steps of the bottom formwork, a "one beam, multiple jacks" layout is formed. After the support frame is hoisted into place in one go, all jacking components naturally align with the step formwork below, eliminating the need for step-by-step handling, straightening, and adjustment. This transforms multiple dispersed processes into a single, integrated process, significantly reducing installation time.

[0010] Further preferably, the support includes a column fixedly mounted on the staircase body, with a height-adjustable steel pipe beam on the column, and a jacking assembly mounted on the steel pipe beam. Specifically, the steel pipe beam has clamps at both ends, which are secured to the column. The height-adjustable steel pipe beam allows adjustment of the jacking assembly's fixing point on the step formwork, adapting to step formwork of different heights while ensuring jacking stability.

[0011] In a further preferred embodiment, the jacking assembly includes a sleeve fixed to the steel pipe beam, a jacking rod inside the sleeve, and a jacking block at the end of the jacking rod facing the step template; to ensure stable jacking of the step template.

[0012] Further optimization involves an internal thread inside the sleeve, an external thread on the push rod, and a rotating handle. The push rod is threadedly engaged with the sleeve, and the push block is connected to the push rod via a ball joint. The threaded engagement between the push rod and the sleeve allows for adjustment of the jacking force by rotating the push rod, resulting in greater applicability.

[0013] Further optimization involves providing threaded holes on the bottom formwork of the staircase, with the step formwork connected to the bottom formwork via bolts that mate with these holes. The step formwork is set to the same length as the bottom formwork, improving the construction quality of the steps.

[0014] Further optimization involves the railing comprising at least two steel posts and at least one crossbar, with the steel posts welded to the staircase body and the crossbar fixed to the steel posts, thereby improving the overall stability of the steel structure staircase formwork.

[0015] Further optimization involves the guardrail comprising two steel posts and two horizontal bars, with the two horizontal bars arranged parallel to each other on the steel posts, and several support rods provided between the two horizontal bars; this improves the overall stability of the steel structure staircase formwork.

[0016] The beneficial effects of this utility model are as follows: The step formwork and the bottom formwork of this utility model are detachably connected, allowing each step to be installed and disassembled independently, significantly reducing on-site construction complexity and improving installation efficiency. The jacking component actively pushes and positions the formwork during installation, ensuring a tight fit between the formwork and the bottom formwork, effectively preventing misalignment, grout leakage, or bulging during concrete pouring, thus improving molding quality. The side panels, guardrails, and bottom formwork form an integral rigid frame, which, combined with the reverse support of the jacking component, effectively resists the lateral pressure of the concrete, preventing formwork deformation or collapse and ensuring the safety of construction personnel.

[0017] This invention addresses the pain points of traditional staircase structures by proposing a steel structure staircase formwork that facilitates step installation. The formwork's base and step templates are fixedly connected with bolts and pushed in place by a jacking assembly. This ensures that the height, width, and levelness of each step meet design requirements, avoiding quality issues such as inconsistent step dimensions and uneven surfaces caused by manual measurement and installation errors. This improves the overall construction quality and aesthetics of the staircase. By optimizing the formwork's structural design, rapid positioning, assembly, and fixing of the step templates are achieved, significantly reducing the operational difficulty and labor intensity for construction workers, shortening the construction cycle of the staircase structure, and enabling it to adapt to the construction needs of common steel structure staircases with different slopes and spans. This increases the turnover rate of the formwork, reduces material and resource waste, and lowers construction costs. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention in Example 1.

[0020] Figure 2 This is a schematic diagram showing the connection state between the jacking component and the support of this utility model.

[0021] Figure 3This is a schematic diagram of the structure of the present invention in Example 3. Detailed Implementation

[0022] 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.

[0023] Example 1, such as Figure 1 As shown, the technical solution of this utility model is implemented as follows: A steel structure staircase formwork for easy installation of steps includes a staircase body 1, which is a steel structure. Side plates 7 and guardrails 5 are provided on both sides of the staircase body 1. The side plates and guardrails can be welded to the staircase body 1 to ensure overall stability. In this embodiment, the staircase body 1 is provided with several staircase bottom formworks 2. The staircase bottom formworks are steel plates at the bottom of the steps. The two ends of the staircase bottom formworks 2 are fixedly connected to the side plates 7. The fixing is optimized by welding to ensure the stability and firmness of the staircase bottom formworks. A step formwork 3 is provided between two adjacent staircase bottom formworks 2. The step formwork 3 is detachably connected to the corresponding staircase bottom formwork 2, that is, the step formwork can be detachably set on the riser of the staircase bottom formwork 2 to form a complete step formwork. The staircase body 1 is provided with a jacking component corresponding to the step formwork 3. The jacking component, such as a screw, hydraulic, or spring jacking mechanism, can actively jack and position the step formwork during installation, ensuring a tight fit between the formwork and the bottom plate, effectively preventing misalignment, grout leakage, or bulging during concrete pouring, and improving the molding quality. The side panels, guardrails, and bottom formwork form an integral rigid frame. Combined with the reverse support of the jacking components, this effectively resists the lateral pressure of the concrete, prevents the formwork from deforming or collapsing, and ensures the safety of construction workers.

[0024] In this embodiment, the step formwork and the bottom formwork of the staircase are connected by a detachable connection, such as bolts, clips, or slots, allowing each step to be installed and disassembled independently. This significantly reduces on-site construction complexity and improves installation efficiency, making it particularly suitable for batch or repetitive construction scenarios. Both the steel structure and the formwork system are reusable components, with almost no loss after dismantling. Compared to traditional wooden formwork or disposable formwork, this greatly reduces material waste and construction costs, aligning with the concept of green construction. This design, through its core innovation of detachable connection and jacking positioning, achieves the triple advantages of rapid installation, high-precision molding, and reusability. It is particularly suitable for prefabricated buildings, commercial buildings, or batch construction of standardized staircases, balancing efficiency, quality, and economy.

[0025] Example 2, as Figure 2As shown, a steel structure staircase formwork for easy installation of steps is further optimized based on Embodiment 1. In this embodiment, the staircase body 1 is equipped with a support 8, which spans across several steps of the bottom formwork 2 to ensure unified jacking of the jacking components and the step formwork. Specifically, the lower part of the support 8 is equipped with several jacking components, which correspond one-to-one with the step formwork 3. After the support is hoisted into place at once, all jacking components naturally align with the step formwork below, eliminating the need for step-by-step handling, straightening, and adjustment. This transforms multiple scattered processes into a single integrated process, significantly reducing installation time; achieving one-time alignment and complete locking. The support concentrates the jacking reaction force of each step onto its own "reverse beam," no longer relying on a single bottom formwork or side plate for resistance; the single-point reaction force becomes a line-distributed load, greatly reducing the risk of local deformation and loosening of the bottom formwork and side plates, resulting in higher forming accuracy. When the same staircase is reused multiple times, the support frame remains stationary as the spatial positioning reference. The formwork can be disassembled simply by loosening the jacking components, and the position is completely reset upon reassembly, ensuring consistent geometric parameters for each stair tread and truly achieving "line-free" reuse. By centrally mounting the jacking components on a support frame spanning multiple steps of the staircase's base, forming a "one beam, multiple jacks" layout, the original discrete, manual single-point adjustment is upgraded to a unified, one-time system locking, balancing speed, precision, safety, and economy. This represents a crucial step towards tool-based and standardized steel structure staircase formwork.

[0026] In this embodiment, the support frame 8 includes a column 81 fixedly mounted on the stair body 1. The column 81 has a height-adjustable steel pipe beam 82, and the jacking assembly is mounted on the steel pipe beam 82. The overall lifting and lowering of the support frame can simultaneously change the clamping force and elevation of all step templates, solving the problem of accumulated errors across multiple steps with a single click. The traditional step requiring re-measurement with feeler gauges and levels for each step is eliminated. The height-adjustable steel pipe beam allows adjustment of the jacking assembly's fixing point on the step template, adapting to step templates of different heights while ensuring jacking stability.

[0027] In this preferred embodiment, the steel pipe beam 82 is equipped with clamps 83 at both ends, which are secured to the column 81. That is, in this embodiment, the height of the steel pipe beam is adjusted via the clamps. When the steel pipe beam is in the appropriate position, the clamps are tightly secured to the column; when the height needs to be adjusted, the clamps are released. The column does not require welding brackets or drilling installation holes; the clamps can slide up and down by tightening and loosening, completely avoiding welding deformation and on-site open flames. Installation, dismantling, and height adjustment can all be done with just two wrenches, ensuring safe operation. The steel pipe beam continuously and steplessly rises and falls along the column. Workers can tighten the clamps while monitoring the level, allowing for easy fine-tuning. For example, the same set of formwork can accommodate both 150mm and 160mm step heights without changing any parts, truly achieving "one ladder, multiple uses." Materials are readily available locally; the columns, steel pipes, and clamps are all the "three-piece set" of a common scaffolding system. After the stairs are completed, the scaffolding can be dismantled and reused directly. There are no additional sunk costs for special profiles, resulting in high turnover, low cost, and the residual value of the formwork system is approximately zero.

[0028] Example 3: A steel structure staircase formwork that facilitates the installation of steps, such as... Figure 2 As shown, based on Embodiment 1 or 2, this embodiment further optimizes the jacking assembly, which includes a sleeve 9 fixed to the steel pipe beam 82. The sleeve can be welded to the steel pipe beam to ensure stability. A jacking rod 10 is provided inside the sleeve 9, and a jacking block 11 is provided at the end of the jacking rod 10 facing the stepped template 3. The jacking rod and the sleeve can be fixedly connected or have an adjustable extension length. The fixed connection is suitable for securing specific stepped templates, while the adjustable extension length is more versatile. The sleeve provides full-length guidance for the jacking rod, avoiding lateral forces generated by "cantilever jacking"; the end face of the jacking block is in 100% contact with the template surface, resulting in a sudden drop in local pressure, preventing the thin steel template from being jacked into "bulges" or "crescents". The top block is made of nylon or UHMW-PE small slippers, which are much lower in hardness than steel formwork but higher than fresh concrete. They are both anti-slip and vibration-damping, and prevent the concrete surface from developing "bright spots" or "fish scale patterns" due to direct pressure from metal. After demolding, the steps are made into "mirror surfaces" in one go, eliminating the need for secondary plastering; thus improving construction efficiency and quality.

[0029] In this embodiment, the adjustable extension length is preferred. Specifically, the sleeve 9 has an internal thread, and the top rod 10 has an external thread and a rotating handle. The rotating handle facilitates manual rotation, saving time and effort. The top rod 10 and the sleeve 9 are threaded together, i.e., the internal thread and the external thread are engaged, providing precise force to provide a suitable jacking force for the step formwork. This effectively prevents misalignment, grout leakage, or bulging during concrete pouring, thus improving the molding quality. The top block 11 is connected to the top rod 10 via a ball joint. The top block can swing freely around the ball center ±8°, ensuring 100% fit even on the back of the inclined step, eliminating indentations and local deformation caused by point or line contact. The threaded pair and the ball joint upgrade the "rigid top" to an adaptive flexible top, allowing each step back to receive a uniform, flawless, and optimal jacking force in one go.

[0030] In this embodiment, the stair base template 2 is provided with threaded holes. Specifically, the riser of the stair base template has multiple threaded holes; in this embodiment, two are used as an example. The step template 3 is connected to the stair base template 2 via bolts 4 that mate with the threaded holes. This bolt connection allows for a detachable connection between the step template and the stair base template, enabling it to adapt to the construction needs of common steel structure staircases with different slopes and spans. This improves the turnover rate of the template, reduces material and resource waste, and lowers construction costs. The step template 3 and the stair base template 2 are set to the same length, ensuring that the tread height, width, and levelness of each step meet the design requirements. This avoids quality problems such as inconsistent step dimensions and uneven surfaces caused by manual measurement and installation errors, thereby improving the overall construction quality and aesthetics of the staircase. By optimizing the structural design of the template, rapid positioning, assembly, and fixing of the step template are achieved, significantly reducing the operational difficulty and labor intensity for construction workers and shortening the construction cycle of the staircase structure.

[0031] like Figure 3 As shown, in this embodiment, the guardrail 5 includes at least two steel posts 6 and at least one crossbar 51. The steel posts 6 are bolted to the stair body 1, and the crossbar 51 is welded to the steel posts 6 to improve overall stability. As a preferred embodiment, the guardrail 5 includes two steel posts 6 and two crossbars 51, with the two crossbars connected in parallel to the steel posts 6, and several support rods 52 provided between the two crossbars 51 to further improve overall stability.

[0032] This invention addresses the pain points of traditional staircase structures by proposing a steel structure staircase formwork that facilitates step installation. The formwork's base and step templates are fixedly connected with bolts and pushed in place by a jacking assembly. This ensures that the height, width, and levelness of each step meet design requirements, avoiding quality issues such as inconsistent step dimensions and uneven surfaces caused by manual measurement and installation errors. This improves the overall construction quality and aesthetics of the staircase. By optimizing the formwork's structural design, rapid positioning, assembly, and fixing of the step templates are achieved, significantly reducing the operational difficulty and labor intensity for construction workers, shortening the construction cycle of the staircase structure, and enabling it to adapt to the construction needs of common steel structure staircases with different slopes and spans. This increases the turnover rate of the formwork, reduces material and resource waste, and lowers construction costs.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel structure staircase formwork for easy installation of steps, comprising a staircase body (1), characterized in that: The stair body (1) has side panels (7) and railings (5) on both sides. The stair body (1) has several stair bottom templates (2). The two ends of the stair bottom templates (2) are fixedly connected to the side panels (7). There are step templates (3) between two adjacent stair bottom templates (2). The step templates (3) are detachably connected to the corresponding stair bottom templates (2). The stair body (1) has a jacking component corresponding to the step templates (3).

2. The steel structure staircase formwork for easy installation of steps according to claim 1, characterized in that: The stair body (1) is provided with a support (8), which spans above several steps of the bottom template (2). The lower part of the support (8) is provided with several jacking components, which correspond one-to-one with the step template (3).

3. The steel structure staircase formwork for easy installation of steps according to claim 2, characterized in that: The support (8) includes a column (81) fixedly installed on the stair body (1), and a height-adjustable steel pipe beam (82) is provided on the column (81), and a jacking assembly is installed on the steel pipe beam (82).

4. The steel structure staircase formwork for easy installation of steps according to claim 3, characterized in that: The steel pipe beam (82) is equipped with clamps (83) at both ends, and the clamps (83) are fastened to the column (81).

5. The steel structure staircase formwork for easy installation of steps according to claim 3 or 4, characterized in that: The jacking assembly includes a sleeve (9) fixed on a steel pipe beam (82), a jacking rod (10) is provided inside the sleeve (9), and a jacking block (11) is provided at one end of the jacking rod (10) facing the step template (3).

6. The steel structure staircase formwork for easy installation of steps according to claim 5, characterized in that: The sleeve (9) has an internal thread, the push rod (10) has an external thread and a rotating handle, the push rod (10) is threadedly engaged with the sleeve (9), and the push block (11) is connected to the push rod (10) through a ball joint.

7. The steel structure staircase formwork for easy installation of steps according to claim 1 or 6, characterized in that: The bottom formwork of the staircase (2) is provided with threaded holes, and the step formwork (3) is connected to the bottom formwork of the staircase (2) by bolts (4) that mate with the threaded holes.

8. The steel structure staircase formwork for easy installation of steps according to claim 7, characterized in that: The step template (3) and the bottom template (2) of the stairs are set to the same length.

9. The steel structure staircase formwork for easy installation of steps according to claim 1 or 8, characterized in that: The guardrail (5) includes at least two steel posts (6) and at least one crossbar (51), the steel posts (6) being welded to the stair body (1) and the crossbar (51) being fixed to the steel posts (6).

10. The steel structure staircase formwork for easy installation of steps according to claim 9, characterized in that: The guardrail (5) includes two steel posts (6) and two crossbars (51). The two crossbars are arranged in parallel on the steel posts (6), and several support rods (52) are provided between the two crossbars (51).

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