Stair structure capable of being turned sideways for transport

Abstract

A stair structure capable of being turned sideways for transport, the stair structure comprising a framework, a fixed floor section disposed at the bottom of the framework, and a movable floor section that rotates along the fixed floor section. A stair unit is connected to the inner surface of the movable floor section, and can be retracted or extended along with the movable floor section. In the present invention, by means of arranging the stair unit on the movable floor section that can be turned sideways, the stair unit can be rotated together with the movable floor section for transport, such that stairs do not need to be transported separately from the framework, thereby greatly improving transport efficiency, and allowing quick mounting after being transported to the site; in addition, by means of arranging a middle column between an upper long beam and the fixed floor section and a lower long beam, compared with the arrangement of multiple thin rods, the mounting is convenient, the number of components is reduced, the load-bearing performance is better, and spatial arrangement is facilitated; moreover, by means of arranging second joists hinged to the movable floor section, transport efficiency and assembly efficiency can be greatly improved.

Description

A staircase structure for side-tipping transport Technical Field

[0001] This invention relates to a staircase structure, and more particularly to a staircase structure for side-tipping transport. Background Technology

[0002] Traditional staircases typically consist of steps, handrails, and landings, and are mainly categorized into two types: on-site installation and modular prefabrication. For example, on-site installation involves using raw materials such as wood, concrete, or steel, with workers cutting, processing, and assembling the staircase components according to the specific site conditions and design requirements. Modular prefabrication, on the other hand, refers to the prefabrication of individual staircase modules (such as steps, landings, and handrails) in a factory, which are then transported to the construction site for assembly. This method has gained increasing popularity in recent years, primarily due to the construction industry's increasing demands for construction efficiency and quality.

[0003] During transportation, on-site installed stairs are usually processed using raw materials on the construction site, eliminating the need to transport finished products. However, installation is time-consuming and labor-intensive, with a long assembly cycle. Modular prefabricated stairs, on the other hand, require the transportation of pre-manufactured modules, typically using trucks or specialized transport vehicles. However, these are difficult to meet container shipping standards and often require disassembly and multiple shipments.

[0004] In addition, traditional staircases are fixed structures that cannot be flipped. Even if staircases could be flipped, it would be to allow them to be flipped to the wall or other locations when not in use, freeing up more living space, rather than to solve transportation problems. Moreover, existing staircase flipping is mainly designed for small staircases in private residences and is not suitable for public staircases in high-rise buildings. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a side-tilting staircase structure with high transportation efficiency and quick installation.

[0006] The technical solution of the present invention is: a side-tilting transport staircase structure, including a formwork frame, a fixed floor slab located at the bottom of the formwork frame, and a movable floor slab that rotates along the fixed floor slab; the inner surface of the movable floor slab is connected to a staircase unit, which can be retracted or unfolded along with the movable floor slab.

[0007] Furthermore, the stair unit includes a tread plate and a lower step connecting the tread plate and the movable floor slab; when the formwork frames are stacked, an upper step is provided between the tread plate of the lower formwork frame and the movable floor slab of the upper formwork frame; the movable floor slab is provided with a stairwell for passing through the upper step at a position corresponding to the upper step.

[0008] Furthermore, one end of the lower step is hinged or detachably connected to the movable floor slab, and the other end is hinged or detachably connected to the ladder platform; one end of the upper step is hinged or detachably connected to the movable floor slab of the upper formwork, and the other end is detachably connected to the ladder platform of the lower formwork.

[0009] Furthermore, when the movable floor slab is unfolded, the two sides of the ladder platform are detachably connected to the columns and / or walls on the adjacent formwork; a ladder platform support rod is provided between the ladder platform and the movable floor slab.

[0010] Furthermore, when the lower step, upper step, and stair platform are transported by tilting and retracting the movable floor slab, the lower step, upper step, and stair platform are fixed to the inner surface of the movable floor slab or inside the stairwell; when the movable floor slab is unfolded, the lower step, upper step, and stair platform are restored to their original positions in the stair unit, and handrails are provided on at least one side of the lower step and upper step.

[0011] Furthermore, when the movable floor slab is tilted and retracted for transportation, the lower and upper steps are hinged and rotated within the stairwell along the movable floor slab and remain horizontal, while the stair platform is removed and fixed to the inner surface of the movable floor slab or hinged and rotated into the stairwell.

[0012] Alternatively, the lower step, upper step, and tread plate can all be removed and fixed to the inner surface of the live floor slab.

[0013] Alternatively, the lower step retains its original inclined state, the upper step is directly hinged and rotated within the stairwell and remains horizontal, and the tread is removed and separately fixed to the inner surface of the open floor slab.

[0014] Furthermore, the two ends of the movable floor slab are connected to movable beams; the stairwell is provided with a stairwell supplementary beam on the side away from the fixed floor slab, the stairwell supplementary beam is connected between the cross section of the movable floor slab and the movable beam, and the stairwell supplementary beam, the cross section of the movable floor slab and the movable beam enclose the stairwell; the stair platform support rod on one side of the stair platform is connected between the stair platform and the stairwell supplementary beam, and the stair platform support rod on the other side is connected between the stair platform and the lower long beam of the formwork.

[0015] Furthermore, the formwork includes two end frames and an upper long beam and a lower long beam disposed between the end frames. A fixed floor slab is disposed at the bottom of the formwork, with one side of the fixed floor slab connected to the lower long beam and the other side hinged to the movable floor slab. The end frames include a first column, a second column, and a crossbeam disposed between the two. The thickness of the second column is less than that of the first column.

[0016] Furthermore, the first column is located on the side away from the live floor slab; a middle column is provided in the middle position between the two end frames and the first columns, the upper end of the middle column is connected to the upper long beam, and the lower end of the middle column passes through the solid floor slab and the lower long beam and is flush with the bottom of the formwork.

[0017] Furthermore, the bottom surface of the fixed floor slab is provided with a first support beam, and the bottom surface of the movable floor slab is provided with a second support beam. The second support beam is rotatably connected to the movable floor slab, so that when the formwork is transported, the second support beam flips and retracts towards the movable floor slab, and when the formwork is constructed on site, the second support beam flips down and unfolds.

[0018] The beneficial effects of this invention are as follows: Firstly, by placing the stair unit on a movable floor slab that can be tilted to the side, it can be rotated and transported together with the movable floor slab, thus eliminating the need to transport the staircase and the formwork separately, greatly improving transportation efficiency, and allowing for quick installation after transportation to the site; secondly, by setting a central column between the upper long beam and the fixed floor slab and the lower long beam, compared to setting multiple thin rods, installation is more convenient, fewer in number, and the stress distribution is better, and spatial arrangement is easier; furthermore, by setting a second support beam that is hinged to the movable floor slab, transportation efficiency and assembly efficiency can be greatly improved. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of the retractable floor slab in the transportation state according to Embodiment 1 of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the movable floor slab in Embodiment 1 of the present invention unfolded at 45°;

[0021] Figure 3 is a structural schematic diagram of the movable floor slab unfolded to 90° in Embodiment 1 of the present invention;

[0022] Figure 4 is a schematic diagram of the structure after the floor slab of Embodiment 1 of the present invention is unfolded to 90° and the stair unit is assembled;

[0023] Figure 5 is a schematic diagram of the stacked upper and lower mold frames in Embodiment 1 of the present invention;

[0024] Figure 6 is a schematic diagram of the horizontal assembly of multiple room molds in front, behind, left, and right of Embodiment 1 of the present invention;

[0025] Figure 7 is a schematic diagram of the rear structure of Embodiment 2 of the present invention, in which the retractable floor slab is retracted and the stair unit components are located in the stairwell.

[0026] Figure 8 is a front structural diagram of Embodiment 2 of the present invention with the retractable floor slab and the stair unit components located in the stairwell.

[0027] Figure 9 is a schematic diagram of the structure of the flexible floor slab in Embodiment 2 of the present invention unfolded at 45°;

[0028] Figure 10 is a structural schematic diagram of the flexible floor slab unfolded to 90° in Embodiment 2 of the present invention;

[0029] Figure 11 is a schematic diagram of the structure of Embodiment 2 of the present invention, in which the movable floor slab is unfolded by 90° and the lower step flips upward and the stair platform is flipped by 180°.

[0030] Figure 12 is a schematic diagram of the structure after the floor slab is unfolded to 90° and the stair unit is assembled according to Embodiment 2 of the present invention.

[0031] Figure 13 is a schematic diagram of the flipping process of the second support beam in Embodiment 5 of the present invention.

[0032] Attached diagram labels: 1. Formwork; 2. Fixed floor slab; 3. Removable floor slab; 4. Staircase unit; 5. End frame; 6. Upper long beam; 7. Lower long beam; 11. Diagonal brace; 12. Elevator; 13. Central column; 21. First supporting beam; 31. Removable beam; 32. Stairwell supplementary beam; 33. Second supporting beam; 41. Stair landing; 42. Lower step; 43. Upper step; 44. Stairwell; 45. Stair landing support rod; 51. First column; 52. Second column. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] As shown in Figures 1 to 5: A side-tilting transport staircase structure includes a formwork 1, a fixed floor slab 2 located at the bottom of the formwork 1, and a movable floor slab 3 that rotates along the fixed floor slab; the inner surface of the movable floor slab 3 is connected to a staircase unit 4, which can be retracted or unfolded along with the movable floor slab 2.

[0036] Specifically, the formwork frame 1 includes two end frames 5 and an upper long beam 6 and a lower long beam 7 located between the end frames. A fixed floor slab 2 is located at the bottom of the formwork frame 1. One side of the fixed floor slab 2 is welded or screwed to the lower long beam 7, and both ends of the fixed floor slab 2 are screwed to the end frames 5. The other side of the fixed floor slab 2 is hinged to a movable floor slab 3. A supporting structure is provided between the upper long beam and the fixed floor slab and the lower long beam. The movable floor slab 3 can be rotated within a range of 0 to 90 degrees along the fixed floor slab. When rotated upwards by 90 degrees, it can serve as a side wall of the formwork frame. When lowered to be horizontal with the fixed floor slab 2, it can serve as the floor of another space adjacent to the formwork frame.

[0037] In this embodiment, by placing the stair unit 4 on the inner surface of the movable floor slab 3, it can be flipped up along with the movable floor slab. During transportation, it can be retrieved together with the movable floor slab 3, so that the formwork can meet the container standard for transportation, eliminating the need for multiple transportations. During on-site construction, only the movable floor slab 3 needs to be flipped down, and a few parts of the stair unit 4 need to be assembled, which greatly improves the installation speed.

[0038] In this embodiment, the mold frame 1 can be a house mold or a ladder mold. In this embodiment, it is preferred to design the mold frame as a house mold. Walls, windows, balconies, etc. can be set on the mold frame, and interior walls, kitchen and bathroom decorations can be set inside the mold frame. In this way, the house mold can be directly packaged and transported.

[0039] In this embodiment, the stair unit 4 includes a tread plate 41 and a lower step 42 connecting the tread plate and the movable floor slab; one end of the movable floor slab has an opening at a position corresponding to the tread plate 41 and the lower step 42, forming a stairwell 44; when the room formwork is stacked, an upper step 43 is provided between the tread plate of the lower formwork frame and the movable floor slab of the upper formwork frame, that is, the upper step 43 passes through the stairwell 44 of the upper formwork frame to connect with one side of the stairwell of the upper formwork frame.

[0040] In this embodiment, one end of the lower step 42 is preferably detachably connected to the movable floor slab 3, and the other end is detachably connected to the step platform 41; one end of the upper step 43 is detachably connected to the movable floor slab 3 of the upper formwork frame, and the other end is detachably connected to the step platform 41 of the lower formwork frame. Specifically, the detachable connections are preferably bolted connections.

[0041] In this embodiment, movable beams 31 are prefabricated at both ends of the movable floor slab 3. When the movable floor slab 3 is lowered to a horizontal position, both ends of the movable beams 31 are bolted to the room formwork located on both sides, specifically to the end frame columns of the room formwork via connecting seats. In this embodiment, a stairwell 44 is provided with a stairwell supplementary beam 32 on the side away from the fixed floor slab 2, that is, the movable floor slab 3 is cut off at this point, and the stairwell supplementary beam 32 is provided between the movable floor slab 3 and the movable beams 31. The stairwell supplementary beam 32, the cross section of the movable floor slab 3, and the movable beams 31 together form the stairwell 44.

[0042] In this embodiment, when transporting the house model, the preferred placement methods for the upper steps, lower steps, and tiered platforms include the following three:

[0043] Method 1: Remove the lower step 42, upper step 43, and stair platform 41 and fix them to the inner surface of the movable floor slab 3. The stair platform 41 is placed separately, and the lower step 42 and upper step 43 are placed side by side on one side of the stair platform 41. The sum of the widths of the lower step 42 and upper step 43 after they are placed side by side is less than the width of the movable floor slab 3, as shown in Figure 1.

[0044] Method 2: Keep the lower step 42 in its original inclined state, and remove the upper step 43 at the end connected to the platform 41. Remove the platform 41 and fix it separately to the inner surface of the movable floor 3. The upper step 43 can be removed and placed on the inner surface of the movable floor 3 or inside the elevator shaft 44 (this method is not shown in the attached drawings).

[0045] Method 3: The lower step 42 and the upper step 43 are completely removed and placed in the elevator shaft 44 on one side of the live floor slab. The lower step 42 and the upper step 43 are placed side by side and bolted to the edge of the live floor slab. The platform 41 is fixed to the inner surface of the live floor slab 3 (this method is not shown in the attached drawings).

[0046] During transportation, the movable floor slab, along with the lower step 42, upper step 43, and stair platform 41, is flipped up together to serve as the side wall of the formwork for containerized transport. Upon arrival at the construction site, the movable floor slab 3 is slowly flipped down and opened, and the upper step 43, lower step 42, and stair platform 41 are removed and assembled according to the original position and structure of the stair unit 4. When there are multi-layered formwork units stacked vertically, the stair unit 4 at each floor of the movable floor slab 3 can be assembled simultaneously, greatly improving installation efficiency. Stair platform support rods 45 are provided between the stair platform 41 and both sides of the movable floor slab 3. For example, in this embodiment, four stair platform support rods 45 are provided, with two connecting the stair platform 41 to the stairwell supplementary beam 32, and the other two connecting the stair platform 41 to the lower long beam 7; one end of two of the four stair platform support rods 45 is also connected between the stair platform 41 and the lower step 42. The step struts 45 serve to support the step platform 41. When the step platform 41 is connected to the step struts 45 on both sides, the step struts 45 are set at 90° to the step platform 41, and corner brackets are set at the included angle. One end of the corner bracket is bolted to the lower surface of the step platform 41, and the other end is welded or bolted to the step strut 45. In addition, both ends of the step platform 41 are also bolted to the end frame columns of the adjacent room formwork, or the room formwork has a wall at the position corresponding to the step platform 41, and the step platform 41 is bolted to the wall. In this embodiment, at least one side of the lower step 42 and the upper step 43 is provided with a handrail.

[0047] As shown in Figure 6, this structure is a group of room models assembled horizontally in all directions. For example, in this embodiment, the entire group of room models is divided into a front building and a rear building. The front building includes room model A and room model B. The movable floor slab of room model A is folded down and connected to the lower long beam of room model B to form a third space, namely room model C. Elevators 12 are installed in both room models A and B. Room model C has a staircase unit 4 that folds down along with the movable floor slab 3. During transportation, the staircase unit 4 folds up along with the movable floor slab 3 to serve as the side wall of room model A. Similarly, the rear building also has two room models, namely room models D and room model E. The movable floor slab of room model D is folded down and connected to the lower long beam of room model E to form a third space, namely room model F. This will not be described in detail here. It can be said that the figure shows a total of four complete room models A, B, D, and E. By folding down the movable floor slabs 3 of two room models, the four room models are combined to form six large spaces. Among them, the room form with the side-turning staircase unit is provided with diagonal bracing 11 at the corner to improve the strength of the room form.

[0048] Example 2

[0049] As shown in Figures 7 to 12: The difference from Embodiment 1 is that in this embodiment, one end of the lower step 42 is hinged to the movable floor slab 3, and the other end is hinged to the ladder platform 41; one end of the upper step 43 is hinged to the movable floor slab 3 of the upper formwork, and the other end is detachably connected to the ladder platform 41 of the lower formwork.

[0050] Specifically, when one end of the lower step 42 is hinged to the movable floor slab 3, a hinge can be installed at the edge of the stairwell 44 of the movable floor slab 3 to allow the lower step 42 to flip. The flip angle is preferably 0-90°, allowing the lower step 42 to flip towards the stairwell 44 and into the stairwell 44. Similarly, when the upper step 43 is hinged to the movable floor slab 3 of the upper formwork, the upper step 43 can flip towards the stairwell 44 and into the stairwell 44. That is, the lower step 42 flips downward and the upper step 43 flips upward, with both located side by side in the stairwell 44. The length of the stairwell 44 is not less than the length of the upper and lower steps 42, and the width of the stairwell 44 is not less than the sum of the widths of the upper and lower steps 42. When the lower step 42 is hinged to the stair platform 41, the flip angle is 0-180°, allowing the stair platform 41 to flip towards the lower step 42 during transportation.

[0051] In this embodiment, when transporting the room model, the preferred placement methods for the upper steps, lower steps, and platform are as follows:

[0052] Method 1: Directly flip the lower step 42 and upper step 43 into the stairwell 44, and flip the stair platform 41 towards the lower step 42. The two sides of the stair platform 41 are fixed to the edge of the elevator shaft by connectors, as shown in Figure 7.

[0053] Method 2: The lower step 42 remains tilted, while the upper step 43 is flipped over and placed horizontally inside the stairwell 44. The tread plate 41 can be directly connected to the lower step 42. This transportation method is suitable when there is sufficient space within the formwork to accommodate the lower step 42 (this method is not shown in the attached drawings).

[0054] After the pedestal 41, upper step 43, and lower step 42 are all placed on and secured to the movable floor slab 3, the movable floor slab 3 is flipped back and used as the side wall of the room formwork for container transport. Upon arrival at the construction site, the movable floor slab 3 is flipped downwards 90° to unfold, the lower step 42 is flipped upwards and secured to the fixed floor slab 3, the pedestal 41 is flipped 180° along the lower step 42 and secured, and then the upper step 43 is flipped downwards and secured to the pedestal of the lower room formwork, forming the staircase unit 4, as shown in Figures 9 to 12.

[0055] The other structures are the same as in Example 1, and will not be described in detail here.

[0056] Example 3

[0057] The difference from Embodiment 2 is that one end of the lower step 42 is hinged to the movable floor 3, and the other end is bolted to the ladder platform 41; one end of the upper step 43 is hinged to the movable floor 3 of the upper formwork, and the other end is bolted to the ladder platform 41 of the lower formwork.

[0058] This connection structure allows for the placement of the upper and lower steps and tiered platforms during the transportation of the building formwork, which can be done in the following ways:

[0059] Method 1: Remove the stair tread 41 and fix it separately to the inner surface of the live floor slab 3, while flip the upper step 43 and the lower step 42 into the stairwell 44 and keep them horizontal.

[0060] Method 2: Keep the lower step 42 in its original tilted state, while the upper step 43 is flipped over and placed horizontally inside the stairwell 44, and the stair tread 41 is removed and fixed separately to the inner surface of the live floor 3.

[0061] Example 4

[0062] Based on Example 1, this example provides a detailed description of the support structure between the upper long beam 6 and the fixed floor slab 2 and the lower long beam 7.

[0063] In this embodiment, the end frame 5 includes a first column 51, a second column 52, and an upper and lower crossbeam located between them. The first column 51 is located on the side away from the fixed floor slab 3. A central column 13 is provided in the middle between the first columns 51 of the two end frames 5, with the upper end of the central column 13 connected to the upper long beam 6 and the lower end of the central column 13 passing through the fixed floor slab 2 and the lower long beam 7 and remaining flush with the bottom of the formwork 1. The structure of the central column 13 is the same as that of the first column 51, while the structure of the second column 52 is different from that of the first column 51. The thickness of the second column 52 is less than that of the first column 51, preferably half the thickness of the first column 51.

[0064] In this embodiment, a central column 13 is set between the upper long beam 6 and the fixed floor slab 2 and the lower long beam 7. The size and structure of the central column 13 are the same as the first column 51 of the end frame 5. Since the central column 13 adopts a large column structure with a square cross-section, only one column is needed to ensure the stress of the formwork 1. Compared with setting multiple thin rods, it is easier to install, requires fewer rods, has better stress distribution, and is easier to arrange in space.

[0065] The other structures are the same as in Example 1.

[0066] Example 5

[0067] As shown in Figure 13: Based on Embodiment 1, the bottom surface of the fixed floor slab 2 is provided with at least two spaced first support beams 21, and the bottom surface of the movable floor slab 3 is provided with at least two spaced second support beams 33. The second support beams 33 are hinged to the movable floor slab 3, and the first support beams are fixedly connected to the fixed floor slab 2. When the movable floor slab 3 is rotated to a horizontal position, the first support beams and the second support beams 33 are just aligned and bolted together by connecting parts such as flanges or angle brackets.

[0068] Specifically, the second support beam 33 can rotate 0-90° along the bottom surface of the movable floor slab 3, allowing it to be rotated and retracted towards the movable floor slab 3 during transportation, and unfolded downwards during on-site construction. After the second support beam 33 is rotated and retracted, it can be further secured to the movable floor slab 3 with bolts to prevent it from opening during transportation. After the second support beam 33 is unfolded downwards, it is connected to the movable floor slab 3 via angle brackets. One end of the angle bracket is bolted to the second support beam 33, and the other end is welded or bolted to the movable floor slab 3.

[0069] Preferably, the first support beam and the second support beam 33 are tubular or channel steel structures.

[0070] The reason why the second support beam 33 is hinged in this embodiment is that if the support beam is installed on site, it will be inconvenient to install. If the support beam is welded into the floor slab, the production will be difficult and many welds will be added. Therefore, the structure of this invention can not only meet the requirement that the second support beam 33 can be rotated and transported together with the live floor slab 3, but also eliminates the need for additional on-site installation, which greatly improves transportation efficiency and assembly efficiency.

[0071] In summary, this invention, on the one hand, by placing the stair unit on a movable floor slab that can be tilted to the side, allows it to be transported by flipping along with the slab, eliminating the need to transport the staircase separately from the formwork, thus greatly improving transportation efficiency and enabling quick installation on site; on the other hand, by setting a central column between the upper long beam and the fixed floor slab and the lower long beam, compared to setting multiple thin rods, installation is more convenient, fewer in number, and the stress distribution is better, and spatial arrangement is easier; furthermore, by setting a second support beam hinged to the movable floor slab, transportation and assembly efficiency can be greatly improved.

Claims

1. A stair structure for side-tilt transport, comprising a formwork, a fixed floor plate provided at the bottom of the formwork, and a movable floor plate rotating along the fixed floor plate; characterized in that, The inner surface of the movable floor slab is connected to a stair unit, which can be retracted or extended along with the movable floor slab.

2. The stair structure for side-tilt transport according to claim 1, characterized by The stair unit includes a tread plate and a lower step connecting the tread plate and the movable floor slab; when the formwork frames are stacked, an upper step is provided between the tread plate of the lower formwork frame and the movable floor slab of the upper formwork frame; the movable floor slab is provided with a stairwell for passing through the upper step at a position corresponding to the upper step.

3. The stair structure for side-tilt transport according to claim 2, characterized by One end of the lower step is hinged or detachably connected to the movable floor slab, and the other end is hinged or detachably connected to the ladder platform; one end of the upper step is hinged or detachably connected to the movable floor slab of the upper formwork, and the other end is detachably connected to the ladder platform of the lower formwork.

4. The stair structure for side-tilt transport according to claim 3, characterized by When the movable floor slab is unfolded, the two sides of the ladder platform are detachably connected to the columns and / or walls on the adjacent formwork; a ladder platform support rod is provided between the ladder platform and the movable floor slab.

5. The stair structure for side-tilt transport according to claim 3, characterized by When the lower step, upper step, and stair platform are transported by tilting and retracting the movable floor slab, the lower step, upper step, and stair platform are fixed to the inner surface of the movable floor slab or in the stairwell. After the movable floor slab is unfolded, the lower step, upper step, and stair platform are restored to their original positions in the stair unit, and handrails are provided on at least one side of the lower step and upper step.

6. The stair structure for side-tilt transport according to claim 5, characterized by When the movable floor slab is tilted and retracted for transportation, the lower and upper steps are hinged and rotated within the stairwell along the movable floor slab and remain horizontal, while the stair landing is removed and fixed to the inner surface of the movable floor slab or hinged and rotated into the stairwell; or the lower, upper, and stair landings are all removed and fixed to the inner surface of the movable floor slab; or the lower step remains in its original tilted state, the upper step is directly hinged and rotated within the stairwell and remains horizontal, while the stair landing is removed and separately fixed to the inner surface of the movable floor slab.

7. The stair structure for side-tilt transport according to claim 4, characterized by The two ends of the movable floor slab are connected to movable beams; the stairwell is provided with a stairwell supplement beam on the side away from the fixed floor slab, the stairwell supplement beam is connected between the cross section of the movable floor slab and the movable beam, and the stairwell supplement beam, the cross section of the movable floor slab and the movable beam enclose the stairwell; the stair platform support rod on one side of the stair platform is connected between the stair platform and the stairwell supplement beam, and the stair platform support rod on the other side is connected between the stair platform and the lower long beam of the formwork.

8. The stair structure for side-tilt transport according to claim 1, characterized by The formwork includes two end frames and an upper and lower long beam located between the end frames. A fixed floor slab is located at the bottom of the formwork, with one side of the fixed floor slab connected to the lower long beam and the other side hinged to the movable floor slab. The end frames include a first column, a second column, and a crossbeam located between the two. The thickness of the second column is less than that of the first column.

9. The stair structure for side-tilt transport according to claim 8, characterized in that The first column is located on the side away from the live floor slab; a middle column is provided in the middle between the two end frames and the first columns, the upper end of the middle column is connected to the upper long beam, and the lower end of the middle column passes through the solid floor slab and the lower long beam and is flush with the bottom of the formwork.

10. The stair structure for side-tilt transport according to claim 8, characterized by The bottom surface of the fixed floor slab is provided with a first support beam, and the bottom surface of the movable floor slab is provided with a second support beam. The second support beam is rotatably connected to the movable floor slab, so that when the formwork is transported, the second support beam flips and retracts towards the movable floor slab, and when the formwork is constructed on site, the second support beam flips down and unfolds.

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