Lateral turning transportation stair structure

Abstract

A stair structure for rollover transportation comprises a formwork, a fixed floor slab arranged at the bottom of the formwork and a movable floor slab rotating along the fixed floor slab. The inner surface of the movable floor slab is connected with a stair unit, and the stair unit can be folded or unfolded along with the movable floor slab. On one hand, the stair units are arranged on the movable floor slabs capable of being turned on one side and can be turned over and transported along with the movable floor slabs, in this way, the stair and the formwork do not need to be transported separately, the transportation efficiency is greatly improved, and installation is rapid after the stair units are transported to the site; on the other hand, the middle column is arranged between the upper long beam and the fixed floor as well as between the upper long beam and the lower long beam, compared with the arrangement of a plurality of slender rods, the installation is convenient, the number is small, the stress is better, and spatial arrangement is facilitated; in addition, through the arrangement of the second joist hinged to the movable floor slab, the transportation efficiency and the assembly efficiency can be greatly improved.

Description

Technical Field

[0001] The invention relates to a staircase structure, in particular to a staircase structure for side-turning transportation. Background Art

[0002] Traditional stairs usually include steps, handrails and platforms, and traditional stairs mainly include on-site installation and modular prefabrication. For example, on-site installation of stairs involves the use of raw materials such as wood, concrete or steel, and workers cut, process and assemble stair components according to the specific conditions and design requirements of the site. Modular prefabrication refers to the pre-manufacturing of various modules of stairs (such as steps, platforms, handrails, etc.) in the factory, and then transporting them to the construction site for assembly. This method has gradually become popular in recent years, mainly due to the construction industry's increased requirements for construction efficiency and quality.

[0003] During transportation, on-site installed stairs are usually processed using raw materials at the construction site, without the need to transport finished products, but installation is time-consuming and labor-intensive, and the assembly cycle is long. Modular prefabricated stairs require the transportation of manufactured modules, usually using trucks or special transport vehicles, but it is difficult to meet container transportation standards and needs to be split for multiple transportations.

[0004] In addition, traditional staircases are fixed structures and cannot be flipped. Even if the stairs can be flipped, it is for the purpose of flipping the stairs to the wall or other locations when not in use to release more space for activities, not to solve transportation problems. Moreover, the flipping of existing stairs is mainly for small stairs for private residents and is not suitable for public stairs used in high-rise buildings. Summary of the invention

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

[0006] The technical solution of the present invention is: a side-turning transport staircase structure, including a formwork, a fixed floor plate arranged at the bottom of the formwork, and a movable floor plate rotating along the fixed floor plate; the inner surface of the movable floor plate is connected to a staircase unit, and the staircase unit can be retracted or unfolded with the movable floor plate.

[0007] Furthermore, the stair unit includes a landing plate and a lower step connected between the landing plate and the movable floor; when the formwork is stacked up and down, an upper step is provided between the landing plate of the lower formwork and the movable floor of the upper formwork; the movable floor 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, 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 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 is unfolded, both sides of the step plate are detachably connected to the columns and / or walls on the adjacent formworks respectively; and a step plate support rod is provided between the step plate and the movable floor.

[0010] Furthermore, when the lower steps, upper steps and landing plates are retracted with the movable floor for transportation, the lower steps, upper steps and landing plates are respectively fixed to the inner surface of the movable floor or in the stairwell; when the movable floor is unfolded, the lower steps, upper steps and landing plates are restored to the original positions of the stair unit, and handrails are provided on at least one side of the lower steps and upper steps.

[0011] Furthermore, when the movable floor is flipped sideways and retracted for transportation, the lower step and the upper step are hingedly rotated along the movable floor in the stairwell and remain horizontal, while the landing plate is removed and fixed to the inner surface of the movable floor or hingedly rotated into the stairwell.

[0012] Alternatively, the lower step, the upper step and the landing plate are all removed and fixed to the inner surface of the movable floor.

[0013] Further alternatively, the lower step maintains its original tilted state, the upper step is directly hinged and rotated in the stairwell and maintained in a horizontal state, and the landing plate is removed and fixed separately to the inner surface of the movable floor.

[0014] Furthermore, movable beams are connected to both ends of the movable floor; a stairwell supplementary beam is provided on the side of the stairwell away from the fixed floor, and the stairwell supplementary beam is connected between the section of the movable floor and the movable beam; the stairwell supplementary beam, the section of the movable floor and the movable beam form 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 arranged between the end frames, and the fixed floor slab is arranged at the bottom of the formwork, one side of the fixed floor slab is connected to the lower long beam, and the other side is hinged to the movable floor slab; the end frame includes a first column, a second column and a cross beam arranged therebetween, and the thickness of the two columns is smaller than that of the first column.

[0016] Furthermore, the first column is located on the side away from the movable floor; a middle column is provided in the middle position between the first columns of the two end frames arranged opposite to each other, 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 fixed floor and the lower long beam and remains flush with the bottom of the formwork.

[0017] Furthermore, a first support beam is provided on the bottom surface of the fixed floor slab, and a second support beam is provided on the bottom surface of the movable floor slab. The second support beam is rotatably connected to the movable floor slab, so that when the formwork is transported, the second support beam is flipped and retracted toward the movable floor slab, and during on-site construction, the second support beam is flipped down and unfolded.

[0018] The beneficial effects of the present invention are as follows: on the one hand, by arranging the stair unit on a movable floor that can be flipped sideways, it can be flipped over and transported together with the movable floor, so there is no need to transport the stairs and the formwork separately, which greatly improves the transportation efficiency and allows quick installation after transportation to the site; on the other hand, by arranging a middle column between the upper long beam and the fixed floor and the lower long beam, compared with arranging multiple thin rods, the installation is convenient, the number is small, the force is better, and the space arrangement is convenient; furthermore, by arranging a second support beam hinged to the movable floor, the transportation efficiency and assembly efficiency can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the movable floor in the transport state when the movable floor is folded up in the first embodiment of the present invention;

[0020] Figure 2 This is a schematic structural diagram of a movable floor in Example 1 of the present invention when it is unfolded 45 degrees;

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

[0022] Figure 4 This is a schematic diagram of the structure of the movable floor after it is unfolded 90 degrees and the staircase unit is assembled in Embodiment 1 of the present invention;

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

[0024] Figure 6 This is a schematic diagram of the structure of multiple room molds horizontally assembled front, back, left, and right in Example 1 of the present invention;

[0025] Figure 7 It is a schematic diagram of the back structure of Embodiment 2 of the present invention, in which the movable floor is retracted and the staircase unit assembly is located in the stairwell;

[0026] Figure 8 is a front structural schematic diagram of Embodiment 2 of the present invention, in which the movable floor is retracted and the staircase unit assembly is located in the stairwell;

[0027] Fig. 9 This is a schematic diagram of the structure of the movable floor in Example 2 of the present invention when it is unfolded 45 degrees;

[0028] Fig.10 This is a schematic structural diagram of a movable floor in Embodiment 2 of the present invention when it is unfolded 90°;

[0029] Fig.11 It is a structural schematic diagram of Embodiment 2 of the present invention, in which the movable floor is unfolded 90°, the lower step is turned upward, and the landing plate is turned 180°;

[0030] Fig.12 This is a schematic diagram of the structure of the movable floor after it is unfolded 90 degrees and the staircase unit is assembled in Embodiment 2 of the present invention;

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

[0032] Description of the accompanying drawings:

[0033] 1. Formwork; 2. Fixed floor; 3. Flexible floor; 4. Staircase unit; 5. End frame; 6. Upper long beam; 7. Lower long beam;

[0034] 11. Diagonal brace; 12. Elevator; 13. Middle column; 21. First joist; 31. Live beam; 32. Stairwell supplementary beam; 33. Second joist; 41. Stair platform; 42. Lower step; 43. Upper step; 44. Stairwell; 45. Stair platform support rod; 51. First column; 52. Second column. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figure 1 to Figure 5 As shown: a staircase structure for side-turning transportation, including a formwork 1, a fixed floor 2 arranged at the bottom of the formwork 1 and a movable floor 3 rotating along the fixed floor; the inner surface of the movable floor 3 is connected to a staircase unit 4, and the staircase unit 4 can be retracted or unfolded with the movable floor 2.

[0038] Specifically, the formwork 1 includes two end frames 5 and an upper long beam 6 and a lower long beam 7 arranged between the end frames. The fixed floor 2 is arranged at the bottom of the formwork 1. One side of the fixed floor 2 is welded or screwed to the lower long beam 7, and the front and rear ends of the fixed floor 2 are screwed to the end frames 5; the other side of the fixed floor 2 is hinged to the movable floor 3. Among them, a supporting structure is provided between the upper long beam and the fixed floor and the lower long beam. The movable floor 3 can be turned over within a range of 0 to 90 degrees along the fixed floor. When turned up 90 degrees, it can be used as the side wall of the formwork. When it is lowered to be level with the fixed floor 2, it can be used as the floor of another space adjacent to the formwork.

[0039] In this embodiment, by placing the stair unit 4 on the inner surface of the movable floor 3, it can be flipped along with the movable floor. When transporting, it can be retracted together with the movable floor 3, so that the formwork meets the container standards for transportation and does not need to be transported multiple times. When constructing on site, it is only necessary to flip down the movable floor 3 and assemble a few parts of the stair unit 4, which greatly improves the installation speed.

[0040] In this embodiment, the mold frame 1 can be a room mold or a ladder mold. In this embodiment, the mold frame is preferably designed as a room mold. Walls, windows, balconies, etc. can be arranged on the mold frame, and interior walls, kitchens and bathrooms can be decorated inside the mold frame. In this way, the room mold can be directly packaged and transported.

[0041] In this embodiment, the stair unit 4 includes a landing plate 41 and a lower step 42 connected between the landing plate and the movable floor; one end of the movable floor is provided with an opening at a position corresponding to the landing plate 41 and the lower step 42 to form a stairwell 44; when the house molds are stacked up and down, an upper step 43 is provided between the landing plate of the lower mold frame and the movable floor of the upper mold frame, that is, the upper step 43 passes through the stairwell 44 of the upper mold frame to be connected to one side of the stairwell of the upper mold frame.

[0042] In this embodiment, one end of the lower step 42 is preferably detachably connected to the movable floor 3, and the other end is detachably connected to the step plate 41; one end of the upper step 43 is detachably connected to the movable floor 3 of the upper formwork, and the other end is detachably connected to the step plate 41 of the lower formwork. Specifically, the detachable connections are preferably bolted.

[0043] In this embodiment, movable beams 31 are prefabricated at the front and rear ends of the movable floor 3. When the movable floor 3 is turned down to a horizontal position, the two ends of the movable beam 31 are respectively bolted to the room molds on both sides thereof, specifically, they are bolted to the end frame columns of the room molds via a connecting seat. The stairwell 44 of this embodiment is provided with a stairwell supplementary beam 32 on the side away from the fixed floor 2, that is, the movable floor 3 is cut off at this place, and the stairwell supplementary beam 32 is provided between the movable floor 3 and the movable beam 31, and the stairwell supplementary beam 32, the cross section of the movable floor 3 and the movable beam 31 enclose the stairwell 44.

[0044] In this embodiment, when the house formwork is transported, the placement of the upper step, the lower step and the platform preferably includes the following three methods:

[0045] Method 1: The lower step 42, the upper step 43 and the landing plate 41 are all removed and fixed to the inner surface of the movable floor 3, wherein the landing plate 41 is placed alone, and the lower step 42 and the upper step 43 are placed side by side on one side of the landing plate 41, and the sum of the widths of the lower step 42 and the upper step 43 when placed side by side is less than the width of the movable floor 3, as shown in the following example. Figure 1 shown.

[0046] Method 2: Keep the lower step 42 in its original tilted state, remove the upper step 43 at the end connected to the landing plate 41, remove the landing plate 41 and fix it separately on the inner surface of the movable floor 3, and the upper step 43 can be removed and placed on the inner surface of the movable floor or in the elevator shaft 44 (this method is not shown in the accompanying drawings).

[0047] Method three: The lower step 42 and the upper step 43 are completely removed and placed in the elevator shaft 44 on one side of the movable floor, wherein the lower step 42 and the upper step 43 are placed side by side and bolted to the edge side of the movable floor, and the stair platform 41 is fixed to the inner surface of the movable floor 3 (this method is not shown in the accompanying drawings).

[0048] During transportation, the movable floor 3 together with the lower step 42, the upper step 43 and the landing plate 41 are turned over as the side wall of the formwork for container transportation; after being transported to the construction site, the movable floor 3 is slowly turned down and opened, the upper step 43, the lower step 42 and the landing plate 41 are removed, and assembled according to the original position and original structure of the stair unit 4; when there are multi-layer room molds stacked up and down, the stair units 4 at each layer of the movable floor 3 can be assembled simultaneously, greatly improving the installation efficiency. Among them, a stair support rod 45 is arranged between the stair plate 41 and the two sides of the movable floor 3. For example, in this embodiment, four stair support rods 45 are arranged, two of which are connected between the stair plate 41 and the stair well supplementary beam 32, and the other two are connected between the stair plate 41 and the lower long beam 7; one end of two of the four stair support rods 45 is also connected between the stair plate 41 and the lower step 42. The step support rods 45 are provided to support the step plate 41. When the step plate 41 is connected to the step support rods 45 on both sides, the step support rods 45 and the step plate 41 are arranged at 90°, and an angle code is provided at the angle, one end of the angle code is bolted to the lower surface of the step plate 41, and the other end is welded or bolted to the step support rods 45. In addition, the two ends of the step plate 41 are also bolted to the end frame columns of the adjacent room mold, or the room mold is provided with a wall at the position corresponding to the step plate 41, and the step plate 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.

[0049] like Figure 6As shown, the structure is a group of room molds in which multiple room molds are horizontally assembled together front, back, left, and right. For example, in this embodiment, the entire room mold group is divided into a front building and a rear building; the front building includes room mold A and room mold B, wherein the movable floor of room mold A is turned down and connected to the lower long beam of room mold B to form a third space, namely room mold C, and the spaces of room mold A and room mold B are both provided with elevators 12, and the space of room mold 3 is provided with a staircase unit 4 that turns down with the movable floor 3. When transporting, the staircase unit 4 turns up with the movable floor 3 as the side wall of room mold A. Similarly, the rear building is also provided with two room molds, namely room mold D and room mold E. The movable floor of room mold D is turned down and connected to the lower long beam of room mold E to form a third space, namely room mold F, which will not be described in detail here. It can be said that the figure is provided with a total of four complete room molds A, B, D and E, and by turning down the movable floor 3 of the two room molds, the four room molds are combined to form six large spaces. Wherein, the corners of the room formwork with the side-turning staircase unit are provided with diagonal braces 11 to improve the strength of the room formwork.

[0050] Example 2

[0051] like Figure 7 to Figure 12 As shown: The difference from Example 1 is that one end of the lower step 42 of this embodiment is hinged to the movable floor 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 3 of the upper formwork, and the other end is detachably connected to the ladder platform 41 of the lower formwork.

[0052] Specifically, when one end of the lower step 42 is hinged to the movable floor 3, a hinge can be set at the edge of the stairwell 44 of the movable floor 3 to enable the lower step 42 to flip, and the flip angle is preferably 0-90°, so that the lower step 42 can flip toward the stairwell 44 and flip into the stairwell 44. Similarly, when the upper step 43 is hinged to the movable floor 3 of the upper formwork, the upper step 43 can flip toward the stairwell 44 and flip into the stairwell 44, that is, the lower step 42 flips downward, the upper step 43 flips upward, and the two are 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 landing 41, the flip angle is 0-180°, and the landing 41 can flip toward the lower step 42 during transportation.

[0053] In this embodiment, when the house formwork is transported, the placement of the upper step, the lower step and the platform preferably includes the following two methods:

[0054] Method 1: directly flip the lower step 42 and the upper step 43 into the stairwell 44, and flip the platform 41 toward the lower step 42, and fix the two sides of the platform 41 to the edge of the elevator shaft through connectors, as shown in the following example: Figure 7 Shown

[0055] Method 2: Keep the lower step 42 in its original tilted state, flip the upper step 43 to be placed horizontally in the stairwell 44, and the landing plate 41 can be directly connected to the lower step 42. This transportation mode is suitable for the case where there is a large space in the formwork to accommodate the lower step 42 (this method is not shown in the drawings).

[0056] After the staircase plate 41, the upper step 43 and the lower step 42 are all placed on the movable floor 3 and fixed, the movable floor 3 is turned over and retracted, and transported in the form of a container as the side wall of the house form. When transported to the construction site, the movable floor 3 is turned down 90 degrees and unfolded, the lower step 42 is turned up and fixed to the fixed floor 3, the staircase plate 41 is turned 180 degrees along the lower step 42 and fixed, and then the upper step 43 is turned down and fixed to the staircase plate of the lower house form, forming the staircase unit 4, as shown in the following figure. Figures 9 to 12 shown.

[0057] The other structures are the same as those in Embodiment 1 and will not be described in detail here.

[0058] Example 3

[0059] The difference from Example 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.

[0060] This connection structure allows the upper steps, lower steps and platform plates to be placed in the following ways when the house formwork is transported:

[0061] Method 1: The stair platform 41 is removed and fixed to the inner surface of the movable floor 3 separately, and the upper step 43 and the lower step 42 are turned over to the stairwell 44 to keep them in a horizontal state.

[0062] Method 2: The lower step 42 is kept in its original tilted state, the upper step 43 is turned over and placed horizontally in the stairwell 44, and the landing plate 41 is removed and fixed separately to the inner surface of the movable floor 3.

[0063] Example 4

[0064] Based on the first embodiment, this embodiment specifically describes the supporting structure between the upper long beam 6 and the fixed floor slab 2 and the lower long beam 7 .

[0065] The end frame 5 of this embodiment includes a first column 51, a second column 52, and an upper crossbeam and a lower crossbeam arranged therebetween; the first column 51 is located on the side away from the movable floor 3; a middle column 13 is arranged in the middle position between the first columns 51 arranged opposite to each other on the two end frames 5, the upper end of the middle column 13 is connected to the upper long beam 6, and the lower end of the middle column 13 passes through the fixed floor 2 and the lower long beam 7 and remains flush with the bottom of the formwork 1. The structure of the middle column 13 is the same as that of the first column 51, and 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, and preferably the thickness is 1 / 2 of the first column 51.

[0066] In this embodiment, a middle column 13 is set between the upper long beam 6 and the fixed floor 2 and the lower long beam 7. The size and structure of the middle column 13 are the same as the first column 51 of the end frame 5. Since the middle column 13 adopts a large column structure with a square cross-sectional shape, only one is needed to ensure the force of the formwork 1. Compared with setting multiple thin rods, the installation is convenient, the number is small, the force is better, and it is convenient for spatial arrangement.

[0067] The other structures are the same as those in Example 1.

[0068] Example 5

[0069] like Fig.13 As shown: On the basis of Example 1, the bottom surface of the fixed floor 2 is provided with at least two first support beams 21 arranged at intervals, and the bottom surface of the movable floor 3 is provided with at least two second support beams 33 arranged at intervals, and the second support beams 33 are hinged to the movable floor 3, and the first support beams are fixedly connected to the fixed floor 2, and when the movable floor 3 is rotated to a horizontal position, the first support beams and the second support beams 33 are just docked, and are bolted together through connecting parts such as flanges or angle brackets.

[0070] Specifically, the second joist 33 can be flipped along the bottom surface of the movable floor 3 by 0 to 90 degrees, so that when the house form is transported, the second joist 33 is flipped and retracted toward the movable floor 3, and during on-site construction, the second joist 33 is flipped down and unfolded. After the second joist 33 is flipped and retracted, the second joist 33 and the movable floor 3 can be further fixed by bolts to prevent opening during transportation. When the second joist 33 is flipped down and unfolded, the second joist 33 and the movable floor 3 are connected by an angle code, one end of the angle code is bolted to the second joist 33, and the other end is welded or bolted to the movable floor 3.

[0071] Preferably, the first and second joists 33 are tubular or channel steel structures.

[0072] 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 lead to inconvenience in installation. If the support beam is welded inside the floor slab, the production difficulty will be large and many welds will be added. Therefore, the structure of the present invention can not only meet the requirement that the second support beam 33 is turned over and transported together with the movable floor slab 3, but also does not require additional installation on site, thereby greatly improving the transportation efficiency and assembly efficiency.

[0073] To sum up, on the one hand, the present invention, by setting the stair unit on a movable floor that can be flipped sideways, can be flipped over and transported together with the movable floor, so that there is no need to transport the stairs and the formwork separately, which greatly improves the transportation efficiency and allows quick installation after transportation to the site; on the other hand, by setting a middle column between the upper long beam and the fixed floor and the lower long beam, compared with setting multiple thin rods, the installation is convenient, the number is small, the force is better, and it is convenient for spatial arrangement; furthermore, by setting a second support beam hinged to the movable floor, the transportation efficiency and assembly efficiency can be greatly improved.

Claims

1. A staircase structure for side-turning transportation, comprising a formwork, a fixed floor plate arranged 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 is connected with a staircase unit, and the staircase unit can be retracted or unfolded along with the movable floor.

2. The staircase structure for rollover transportation according to claim 1, characterized in that: The stair unit includes a landing plate and a lower step connected between the landing plate and the movable floor; when the formwork is stacked up and down, an upper step is provided between the landing plate of the lower formwork and the movable floor of the upper formwork; the movable floor is provided with a stairwell for passing the upper step at a position corresponding to the upper step.

3. The staircase structure for rollover transportation according to claim 2, characterized in that: One end of the lower step is hinged or detachably connected to the movable floor, 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 of the upper formwork, and the other end is detachably connected to the ladder platform of the lower formwork.

4. The staircase structure for rollover transportation according to claim 3, characterized in that: When the movable floor is unfolded, the two sides of the stair platform are detachably connected to the columns and / or walls on the adjacent formwork respectively; a stair platform support rod is provided between the stair platform and the movable floor.

5. The staircase structure for rollover transportation according to claim 3, characterized in that: When the lower step, upper step and landing plate are retracted for transportation as the movable floor is flipped sideways, the lower step, upper step and landing plate are respectively fixed to the inner surface of the movable floor or in the stairwell; when the movable floor is unfolded, the lower step, upper step and landing plate are restored to the original position of the stair unit, and handrails are provided on at least one side of the lower step and the upper step.

6. The staircase structure for rollover transportation according to claim 5, characterized in that: When the movable floor is flipped sideways and retracted for transportation, the lower step and the upper step are hinged and rotated along the movable floor in the stairwell and remain in a horizontal state, and the landing plate is removed and fixed to the inner surface of the movable floor or hinged and rotated into the stairwell; or the lower step, the upper step and the landing plate are all removed and fixed to the inner surface of the movable floor; or the lower step maintains its original inclined state unchanged, the upper step is directly hinged and rotated in the stairwell and remains in a horizontal state, and the landing plate is removed and fixed separately to the inner surface of the movable floor.

7. The staircase structure for rollover transportation according to claim 4, characterized in that: Both ends of the movable floor are connected with movable beams; a stairwell supplementary beam is provided on the side of the stairwell away from the fixed floor, the stairwell supplementary beam is connected between the section of the movable floor and the movable beam, and the stairwell is enclosed by the stairwell supplementary beam, the section of the movable floor and the movable beam; 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.

8. The staircase structure for rollover transportation according to claim 1, characterized in that: The formwork comprises two end frames and an upper long beam and a lower long beam arranged between the end frames. The fixed floor slab is arranged at the bottom of the formwork, one side of the fixed floor slab is connected to the lower long beam, and the other side is hinged to the movable floor slab; the end frame comprises a first column, a second column and a cross beam arranged therebetween, and the thickness of the second column is smaller than that of the first column.

9. The staircase structure for side-turning transportation according to claim 8, characterized in that: The first column is located on the side away from the movable floor; a middle column is provided in the middle position between the first columns of the two end frames which are arranged opposite to each other, 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 fixed floor and the lower long beam and remains flush with the bottom of the formwork.

10. The staircase structure for side-turning transportation according to claim 8, characterized in that: A first support beam is provided on the bottom surface of the fixed floor slab, and a second support beam is provided on the bottom surface of the movable floor slab. The second support beam is rotatably connected to the movable floor slab, so that when the formwork is transported, the second support beam is flipped and retracted toward the movable floor slab, and during on-site construction, the second support beam is flipped down and unfolded.

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