A building staircase template structure and its supporting method

Abstract

The present invention discloses a building stair formwork structure and a supporting method thereof, which specifically relates to the technical field of building construction, and comprises two side formworks, wherein a connecting support plate is fixedly provided at the bottom end of the side formworks, a bottom formwork is provided between the two side formworks, and limit blocks are fixedly provided on both sides of the bottom formworks, a limit groove is provided on the inner side of the side formworks, and a limit fixing mechanism is provided on the outer side of the side formworks. The present invention simultaneously limits and fixes a plurality of treads and connecting baffles through a limit fixing mechanism, so that the installation and fixing speed of the treads and connecting baffles is faster, the installation and fixing efficiency is higher, and thus the supporting efficiency of the entire stair formwork is effectively improved, and the gaps in the stair casting cavity formed between the side formworks, the bottom formworks, the treads and the connecting baffles are less, and the gaps are tightly fitted, thereby avoiding the occurrence of poor casting quality and difficulty in demoulding caused by concrete entering the gaps, and the use effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of house construction technology, and in particular to a building staircase template structure and a supporting method thereof. Background Art

[0002] Housing construction refers to the construction of houses or other buildings on land where infrastructure construction has been completed. It covers the construction of residential buildings, industrial plants, commercial buildings, office buildings, and other special buildings. Concrete stairs need to be poured during housing construction. Before pouring, stair formwork needs to be set up. The quality of stair formwork directly affects the quality of poured concrete stairs.

[0003] Patent number "CN110644782B" "A building staircase formwork structure and its supporting method" introduces a staircase formwork with fewer steps and easy assembly. The invention reduces the steps of supporting the formwork by slotting the bottom formwork, then connecting the side formwork to the bottom formwork through a clamping block, and then installing and fixing multiple step forms and treads through multiple locking mechanisms. However, in this method, the installation of each step formwork and tread needs to be fixed using the locking bolts in the locking mechanism, which makes the installation and fixing of the treads slow and the installation and fixing efficiency low, which in turn makes the support efficiency of the stair formwork low.

[0004] Therefore, it is necessary to invent a building staircase template structure and a supporting method thereof to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a building stair formwork structure and a supporting method thereof, which can simultaneously limit and fix multiple treads and connecting baffles through a limiting and fixing mechanism, so that the installation and fixing speed of the treads and connecting baffles is faster, and the installation and fixing efficiency is higher, thereby effectively improving the supporting efficiency of the entire stair formwork, and the gaps in the stair casting cavity formed between the side formwork, the bottom formwork, the treads and the connecting baffles are smaller, and the gaps are tightly fitted, thereby avoiding the poor casting quality and difficulty in demolding caused by concrete entering the gaps, and the use effect is better, so as to solve the above-mentioned deficiencies in the technology.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a building staircase template structure and a supporting method thereof, comprising two side templates, a connecting support plate is fixedly provided at the bottom end of the side template, the connecting support plate and the side template are an integrated structure, a bottom template is provided between the two side templates, the bottom template is arranged at the top end of the connecting support plate, limiting blocks are fixedly provided on both sides of the bottom template, a limiting groove is provided on the inner side of the side template, and the limiting block is arranged inside the limiting groove;

[0007] A plurality of treads are provided at the top of the two side templates, a connecting baffle is fixedly provided on the front side of the treads, the treads and the connecting baffles are an integrally formed structure, and the plurality of treads and the connecting baffles are distributed in a stepped manner, a plurality of sealing connecting grooves are opened at the top of the side templates, sealing connecting plates are fixedly provided on both sides of the inner ends of the treads and the connecting baffles, the sealing connecting plates are arranged inside the sealing connecting grooves, and a limiting fixing mechanism is provided on the outer side of the side templates.

[0008] Preferably, the limit fixing mechanism includes a first movable plate arranged on the outside of the side template, a plurality of first limit rods are provided inside the first movable plate, and a first limit hole is opened in the sealing connecting plate, one end of the first limit rod passes through the outside of the side template and extends into the first limit hole, two first threaded rods are provided on the outside of both ends of the first movable plate, one end of the first threaded rod passes through the first movable plate and is rotatably connected between the outside of the side template, the first threaded rod is threadedly connected to the first movable plate, and the two first threaded rods are respectively arranged on the front and rear sides of the plurality of first limit rods, one of the first threaded rods is fixedly provided with a turning handle at the other end, and a first pulley is fixedly provided at the outer end of the first threaded rod, the first pulley is arranged on the outside of the first movable plate, and the two first pulleys are connected by a first belt, which is convenient for limiting and fixing the step plate and the connecting baffle, and then facilitating the connection and installation between the step plate and the connecting baffle and the side template.

[0009] Preferably, a supporting base plate is provided at the bottom of the connecting support plate, a plurality of supporting rods of different lengths are provided at the top of the supporting base plate, a plurality of U-shaped fixing frames are fixedly provided at the bottom end of the connecting support plate, a damping shaft is fixedly provided at the inner end of the U-shaped fixing frame, the top end of the supporting rod extends to the inside of the U-shaped fixing frame and is rotatably connected to the U-shaped fixing frame through the damping shaft, so as to facilitate the support and fixation of the side formwork and the connecting support plate.

[0010] Preferably, a mounting groove is provided at the top of the support base plate, the bottom end of the support rod extends into the mounting groove, a second movable plate is provided on the outside of the support base plate, a plurality of second limiting rods are fixedly provided on the inside of the second movable plate, a second limiting hole is provided at the bottom end of the support rod, one end of the second limiting rod passes through the outside of the support base plate and extends into the second limiting hole, and a handle is fixedly provided on the outside of the second movable plate to facilitate connecting and fixing the bottom end of the support rod to the support base plate.

[0011] Preferably, fixing rods are provided on the outer sides of both ends of the second movable plate, the handle is provided between the two fixing rods, one end of the fixing rod passes through the first movable plate and is fixedly connected to the outer side of the supporting bottom plate, the other end of the fixing rod is fixedly provided with a fixed connecting plate, and a return spring is provided at the outer end of the fixing rod, and both ends of the return spring are respectively fixedly connected to the inner side of the fixed connecting plate and the outer side of the second movable plate, so as to facilitate the resetting of the second movable plate and the second limit rod.

[0012] Preferably, a plurality of brake wheels are fixedly provided at the bottom end of the supporting base plate to facilitate the movement of the two supporting base plates.

[0013] Preferably, two second threaded rods are fixedly provided on the inner sides of the two supporting base plates, a threaded sleeve is provided between the two opposite second threaded rods, one end of the two second threaded rods respectively extend into the two ends of the threaded sleeves and are threadedly connected to the inside of the threaded sleeves, a second pulley is fixedly provided on the outer end of the threaded sleeves, and the two second pulleys are connected by a second belt, two turntables are fixedly provided on the outer end of one of the threaded sleeves, and the two turntables are respectively arranged on both sides of the second pulley, so as to facilitate the driving of the two supporting base plates to approach each other, and further facilitate the connection and fixation between the side template and the bottom template.

[0014] The invention also includes a method for supporting the building staircase template structure, the steps of which are:

[0015] S1: Pull the handle outward, the handle drives the second movable plate to move outward, the second movable plate drives the plurality of second limiting rods to leave the installation slot and compress the reset spring, put the bottom end of the support rod into the installation slot, release the handle, the second movable plate drives the second limiting rod to be inserted into the second limiting hole at the bottom end of the support rod under the elastic force of the reset spring, thus completing the connection between the side template, the connecting support plate and the support bottom plate;

[0016] S2: Place the bottom template between the two side templates, the two connecting support plates will support the bottom template, align the limit blocks on both sides of the bottom template with the limit grooves on the side templates respectively, rotate the turntable, the turntable drives a threaded sleeve to rotate, the threaded sleeve drives another threaded sleeve to rotate through the second pulley and the second belt, one end of the two second threaded rods will move toward the inside of the threaded sleeve as the threaded sleeve rotates, the second threaded rods drive the two supporting bottom plates to approach each other, the supporting bottom plates drive the two side templates and the connecting support plates to approach each other through the support rods, so that the limit blocks on both sides of the bottom template will be inserted into the limit grooves, thus completing the connection between the side template and the bottom template;

[0017] S3: Turn the handle, the handle drives a first threaded rod to rotate, and the first threaded rod drives another first threaded rod to rotate through the first pulley and the first belt. Since the first threaded rod is threadedly connected to the first movable plate, the first movable plate moves outward with the rotation of the first threaded rod, and the first movable plate drives one end of multiple first limiting rods to leave the sealed connection groove, and put multiple treads and connecting baffles from bottom to top on the top of the two side templates in sequence, so that the sealed connection plate is inserted into the sealed connection groove, and then the handle is turned in the opposite direction, the handle drives the first threaded rod to rotate in the opposite direction, and the first movable plate will drive multiple first limiting rods to be inserted into the first limiting hole on the sealing connection plate with the rotation of the first threaded rod. In this way, multiple treads and connecting baffles can be limited and fixed at the same time, thus completing the support of the entire stair template.

[0018] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0019] 1. The limiting and fixing mechanism is used to simultaneously limit and fix multiple treads and connecting baffles, so that the installation and fixing speed of the treads and connecting baffles is faster and the installation and fixing efficiency is higher, thereby effectively improving the support efficiency of the entire stair formwork. The gaps in the stair casting cavity formed between the side formwork, the bottom formwork, the treads and the connecting baffles are smaller, and the gaps are tightly fitted, thereby avoiding the poor casting quality and difficulty in demolding caused by concrete entering the gaps, and the use effect is better;

[0020] 2. By setting the connection support plate and the support rod separately from the support bottom plate, the template structure is easy to carry and transport, and the connection and fixation between the connection support plate and the support rod and the support bottom plate is also relatively simple and convenient, the connection and installation efficiency is also high, and the practicability is strong;

[0021] 3. The two second threaded rods drive the two supporting base plates closer to each other, and then drive the two side templates to fit closely with both sides of the bottom template, so that the connection between the side template and the bottom template is simpler and more convenient, the connection and installation efficiency is higher, the support efficiency of the template is further improved, and the connection is more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A is a schematic diagram of the enlarged structure;

[0025] Figure 3 For the present invention Figure 1 Middle B is a schematic diagram of the enlarged structure;

[0026] Figure 4 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the side formwork and the connecting support plate of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the first movable plate and the first limiting rod of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the bottom template and the limiting block of the present invention;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the step plate, the connecting baffle plate and the sealing connecting plate of the present invention;

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the supporting base plate of the present invention;

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the support rod and the U-shaped fixing frame of the present invention;

[0033] Fig.11 It is a schematic diagram of the three-dimensional structure of the second movable plate and the second limiting rod of the present invention;

[0034] Fig.12 It is a schematic diagram of the three-dimensional structure of the second threaded rod and the threaded sleeve of the present invention.

[0035] Description of reference numerals:

[0036] 1. Side template; 2. Connecting support plate; 3. Bottom template; 4. Limit block; 5. Limit groove; 6. Step plate; 7. Connecting baffle; 8. Sealing connecting groove; 9. Sealing connecting plate; 10. First movable plate; 11. First limiting rod; 12. First limiting hole; 13. First threaded rod; 14. Turning handle; 15. First pulley; 16. First belt; 17. Supporting bottom plate; 18. Support rod; 19. U-shaped fixing frame; 20. Damping shaft; 21. Mounting groove; 22. Second movable plate; 23. Second limiting rod; 24. Second limiting hole; 25. Handle; 26. Fixed rod; 27. Fixed connecting plate; 28. Reset spring; 29. ​​Brake wheel; 30. Second threaded rod; 31. Threaded sleeve; 32. Second pulley; 33. Second belt; 34. Turntable. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] The present invention provides Figure 1 , 2 , 5, 6, 7 and 8 show a building staircase formwork structure and a supporting method thereof, comprising two side formworks 1, a connecting support plate 2 is fixedly provided at the bottom end of the side formworks 1, the connecting support plate 2 and the side formworks 1 are an integral structure, a bottom formwork 3 is provided between the two side formworks 1, the bottom formwork 3 is provided at the top end of the connecting support plate 2, limiting blocks 4 are fixedly provided on both sides of the bottom formworks 3, a limiting groove 5 is provided on the inner side of the side formwork 1, and the limiting block 4 is provided inside the limiting groove 5;

[0039] A plurality of treads 6 are provided at the top of the two side templates 1, and a connecting baffle 7 is fixedly provided on the front side of the treads 6. The treads 6 and the connecting baffles 7 are an integrally formed structure, and the plurality of treads 6 and the connecting baffles 7 are distributed in a stepped manner. A plurality of sealing connecting grooves 8 are provided at the top of the side template 1, and sealing connecting plates 9 are fixedly provided on both sides of the inner ends of the treads 6 and the connecting baffles 7. The sealing connecting plates 9 are arranged inside the sealing connecting grooves 8, and a limiting fixing mechanism is provided on the outer side of the side template 1.

[0040] The limiting and fixing mechanism includes a first movable plate 10 arranged on the outside of the side template 1, a plurality of first limiting rods 11 are arranged on the inside of the first movable plate 10, a first limiting hole 12 is opened on the sealing connecting plate 9, one end of the first limiting rod 11 passes through the outside of the side template 1 and extends into the first limiting hole 12, two first threaded rods 13 are arranged on the outside of both ends of the first movable plate 10, one end of the first threaded rod 13 passes through the first movable plate 10 and is rotatably connected to the outside of the side template 1, the first threaded rod 13 is threadedly connected to the first movable plate 10, the two first threaded rods 13 are respectively arranged on the front and rear sides of the plurality of first limiting rods 11, one of the first threaded rods 13 is fixedly provided with a turning handle 14 at the other end, and a first pulley 15 is fixedly provided at the outer end of the first threaded rod 13, the first pulley 15 is arranged on the outside of the first movable plate 10, and the two first pulleys 15 are connected by a first belt 16.

[0041] The turning handle 14 is turned, and the turning handle 14 drives a first threaded rod 13 to rotate. The first threaded rod 13 drives another first threaded rod 13 to rotate through the first pulley 15 and the first belt 16. Since the first threaded rod 13 is threadedly connected to the first movable plate 10, the first movable plate 10 moves outward with the rotation of the first threaded rod 13, and the first movable plate 10 drives one end of multiple first limiting rods 11 to leave the sealed connection groove 8, and put multiple step plates 6 and connecting baffles 7 from bottom to top in turn on the top of the two side templates 1, so that the sealed connection plate 9 is inserted into the sealed connection groove 8, and then the turning handle 14 is turned in the opposite direction. The turning handle 14 drives the first threaded rod 13 to rotate in the opposite direction. The first movable plate 10 will drive multiple first limiting rods 11 to be inserted into the first limiting hole 12 on the sealing connection plate 9 with the rotation of the first threaded rod 13. In this way, multiple step plates 6 and connecting baffles 7 can be simultaneously limited and fixed, thus completing the support of the stair template.

[0042] The present invention uses a limiting and fixing mechanism to simultaneously limit and fix multiple treads 6 and connecting baffles 7, so that the installation and fixing speed of the treads 6 and the connecting baffles 7 is faster, and the installation and fixing efficiency is higher, thereby effectively improving the supporting efficiency of the entire stair formwork, and the stair casting cavity formed between the side formwork 1, the bottom formwork 3, the treads 6 and the connecting baffles 7 has fewer gaps, and the gaps are tightly fitted, thereby avoiding the poor casting quality and difficulty in demolding caused by concrete entering the gaps, and the use effect is better. This embodiment specifically solves the problem that during the supporting process of the building stair formwork structure in the prior art, the installation of each step form and tread needs to be fixed using the locking bolts in the locking mechanism, which makes the installation and fixing speed of the treads slower, the installation and fixing efficiency is lower, and thereby the supporting efficiency of the stair formwork is lower.

[0043] The present invention provides Figure 1 , 3, 9, 10 and 11 show a building staircase formwork structure and a supporting method thereof, wherein a supporting base plate 17 is provided at the bottom of the connecting support plate 2, a plurality of supporting rods 18 of different lengths are provided at the top of the supporting base plate 17, a plurality of U-shaped fixing frames 19 are fixedly provided at the bottom end of the connecting support plate 2, a damping shaft 20 is fixedly provided at the inner end of the U-shaped fixing frame 19, the top end of the supporting rod 18 extends to the inside of the U-shaped fixing frame 19 and is rotatably connected to the U-shaped fixing frame 19 through the damping shaft 20, a mounting groove 21 is provided at the top of the supporting base plate 17, the bottom end of the supporting rod 18 extends into the inside of the mounting groove 21, a second movable plate 22 is provided on the outer side of the supporting base plate 17, and a second movable plate 22 is fixedly provided on the inner side of the second movable plate 22 A plurality of second limiting rods 23 are provided, and a second limiting hole 24 is formed at the bottom end of the support rod 18. One end of the second limiting rod 23 passes through the outside of the support bottom plate 17 and extends into the second limiting hole 24. A handle 25 is fixedly provided on the outside of the second movable plate 22. Fixed rods 26 are provided on the outside of both ends of the second movable plate 22. The handle 25 is arranged between the two fixed rods 26. One end of the fixed rod 26 passes through the first movable plate 10 and is fixedly connected to the outside of the support bottom plate 17. A fixed connecting plate 27 is fixedly provided at the other end of the fixed rod 26. A return spring 28 is provided at the outer end of the fixed rod 26. The two ends of the return spring 28 are respectively fixedly connected to the inner side of the fixed connecting plate 27 and the outer side of the second movable plate 22.

[0044] A plurality of brake wheels 29 are fixedly provided at the bottom end of the support base plate 17 .

[0045] The handle 25 is pulled outward, and the handle 25 drives the second movable plate 22 to move outward. The second movable plate 22 drives multiple second limiting rods 23 to leave the installation groove 21 and compress the return spring 28, and the bottom end of the support rod 18 is placed into the installation groove 21. The handle 25 is released, and the second movable plate 22 drives the second limiting rod 23 to be inserted into the second limiting hole 24 at the bottom end of the support rod 18 under the elastic force of the return spring 28. In this way, the connection between the side template 1, the connecting support plate 2 and the supporting bottom plate 17 is completed. The present invention makes the template structure easy to carry and transport by separately arranging the connecting support plate 2 and the support rod 18 and the supporting bottom plate 17, and the connection and fixation between the connecting support plate 2 and the support rod 18 and the supporting bottom plate 17 is also relatively simple and convenient, and the efficiency of the connection and installation is also high, and the practicality is strong.

[0046] The present invention provides Figure 4 and 12A building stair formwork structure and a supporting method thereof are shown, wherein two second threaded rods 30 are fixedly provided on the inner sides of two supporting base plates 17, a threaded sleeve 31 is provided between the two opposite second threaded rods 30, one end of the two second threaded rods 30 respectively extends into the interiors of both ends of the threaded sleeve 31 and is threadedly connected to the interiors of the threaded sleeve 31, a second pulley 32 is fixedly provided on the outer end of the threaded sleeve 31, the two second pulleys 32 are connected by a second belt 33, two turntables 34 are fixedly provided on the outer end of one of the threaded sleeves 31, and the two turntables 34 are respectively provided on both sides of the second pulley 32.

[0047] The bottom template 3 is placed between the two side templates 1. The two connecting support plates 2 support the bottom template 3. The limiting blocks 4 on both sides of the bottom template 3 are aligned with the limiting grooves 5 on the side templates 1 respectively. The turntable 34 is rotated. The turntable 34 drives a threaded sleeve 31 to rotate. The threaded sleeve 31 drives another threaded sleeve 31 to rotate through the second pulley 32 and the second belt 33. One end of the two second threaded rods 30 moves toward the inside of the threaded sleeve 31 as the threaded sleeve 31 rotates. The second threaded rods 30 drive the two supporting bottom plates 17 to approach each other. The supporting bottom plates 17 are connected to the bottom plates 17 by the second pulley 32 and the second belt 33. The support rod 18 drives the two side templates 1 and the connecting support plate 2 to approach each other, so that the limit blocks 4 on both sides of the bottom template 3 will be inserted into the limit groove 5, thus completing the connection between the side template 1 and the bottom template 3. The present invention drives the two supporting bottom plates 17 to approach each other through the two second threaded rods 30, and then drives the two side templates 1 to fit tightly with both sides of the bottom template 3, so that the connection between the side template 1 and the bottom template 3 is relatively simple and convenient, the connection and installation efficiency is relatively high, the template support efficiency is further improved, and the connection is relatively firm.

[0048] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A building staircase formwork structure, comprising two side formworks (1), characterized in that: A connecting support plate (2) is fixedly provided at the bottom end of the side template (1), the connecting support plate (2) and the side template (1) are an integral structure, a bottom template (3) is provided between the two side templates (1), the bottom template (3) is arranged at the top end of the connecting support plate (2), and limit blocks (4) are fixedly provided on both sides of the bottom template (3), a limit groove (5) is provided on the inner side of the side template (1), and the limit block (4) is arranged inside the limit groove (5); A plurality of treads (6) are provided at the top ends of the two side templates (1), a connecting baffle (7) is fixedly provided at the front side of the treads (6), the treads (6) and the connecting baffle (7) are an integrally formed structure, the plurality of treads (6) and the connecting baffle (7) are distributed in a stepped manner, a plurality of sealing connection grooves (8) are provided at the top ends of the side templates (1), sealing connection plates (9) are fixedly provided on both sides of the inner ends of the treads (6) and the connecting baffle (7), the sealing connection plates (9) are arranged inside the sealing connection grooves (8), and a limiting fixing mechanism is provided on the outer side of the side template (1); The limiting fixing mechanism comprises a first movable plate (10) arranged on the outside of the side template (1), a plurality of first limiting rods (11) are arranged on the inside of the first movable plate (10), a first limiting hole (12) is opened on the sealing connection plate (9), one end of the first limiting rod (11) passes through the outside of the side template (1) and extends into the first limiting hole (12), two first threaded rods (13) are arranged on the outside of both ends of the first movable plate (10), one end of the first threaded rod (13) passes through the first movable plate (10) and is connected to the side template (1 ), the first threaded rod (13) is threadedly connected to the outer side of the first movable plate (10), two of the first threaded rods (13) are respectively arranged on the front and rear sides of the plurality of first limit rods (11), a turning handle (14) is fixedly provided at the other end of one of the first threaded rods (13), a first belt pulley (15) is fixedly provided at the outer end of the first threaded rod (13), the first belt pulley (15) is arranged on the outer side of the first movable plate (10), and the two first belt pulleys (15) are connected via a first belt (16).

2. A building staircase formwork structure according to claim 1, characterized in that: A supporting base plate (17) is provided at the bottom of the connecting support plate (2), a plurality of supporting rods (18) of different lengths are provided at the top of the supporting base plate (17), a plurality of U-shaped fixing frames (19) are fixedly provided at the bottom of the connecting support plate (2), a damping shaft (20) is fixedly provided at the inner end of the U-shaped fixing frame (19), and the top end of the supporting rod (18) extends into the interior of the U-shaped fixing frame (19) and is rotatably connected to the U-shaped fixing frame (19) via the damping shaft (20).

3. A building staircase formwork structure according to claim 2, characterized in that: The top end of the support base plate (17) is provided with a mounting groove (21), the bottom end of the support rod (18) extends into the mounting groove (21), a second movable plate (22) is provided on the outside of the support base plate (17), a plurality of second limiting rods (23) are fixedly provided on the inside of the second movable plate (22), a second limiting hole (24) is provided on the bottom end of the support rod (18), one end of the second limiting rod (23) passes through the outside of the support base plate (17) and extends into the inside of the second limiting hole (24), and a handle (25) is fixedly provided on the outside of the second movable plate (22).

4. A building staircase formwork structure according to claim 3, characterized in that: The second movable plate (22) is provided with a fixing rod (26) at both ends thereof. The handle (25) is provided between the two fixing rods (26). One end of the fixing rod (26) passes through the first movable plate (10) and is fixedly connected to the outer side of the supporting bottom plate (17). The other end of the fixing rod (26) is fixedly provided with a fixing connecting plate (27). The outer end of the fixing rod (26) is provided with a return spring (28). The two ends of the return spring (28) are respectively fixedly connected to the inner side of the fixing connecting plate (27) and the outer side of the second movable plate (22).

5. A building staircase formwork structure according to claim 2, characterized in that: A plurality of brake wheels (29) are fixedly provided at the bottom end of the supporting base plate (17).

6. A building staircase formwork structure according to claim 4, characterized in that: Two second threaded rods (30) are fixedly provided on the inner sides of the two supporting base plates (17); a threaded sleeve (31) is provided between the two opposing second threaded rods (30); one end of the two second threaded rods (30) respectively extends into the interior of the two ends of the threaded sleeve (31) and is threadedly connected to the interior of the threaded sleeve (31); a second belt pulley (32) is fixedly provided on the outer end of the threaded sleeve (31); the two second belt pulleys (32) are connected via a second belt (33); two rotating disks (34) are fixedly provided on the outer end of one of the threaded sleeves (31); the two rotating disks (34) are respectively arranged on both sides of the second belt pulley (32).

7. A method for supporting a building staircase formwork structure according to claim 6, characterized in that: The following steps are involved: S1: Pull the handle (25) outward, the handle (25) drives the second movable plate (22) to move outward, the second movable plate (22) drives the plurality of second limiting rods (23) to leave the interior of the installation groove (21) and compress the return spring (28), the bottom end of the support rod (18) is placed into the interior of the installation groove (21), the handle (25) is released, and the second movable plate (22) drives the second limiting rod (23) to be inserted into the second limiting hole (24) at the bottom end of the support rod (18) under the elastic force of the return spring (28), thereby completing the connection between the side template (1), the connecting support plate (2) and the support bottom plate (17); S2: placing the bottom template (3) between the two side templates (1), the two connecting support plates (2) will support the bottom template (3), aligning the limit blocks (4) on both sides of the bottom template (3) with the limit grooves (5) on the side template (1), rotating the turntable (34), the turntable (34) drives a threaded sleeve (31) to rotate, the threaded sleeve (31) drives another threaded sleeve (31) to rotate through the second pulley (32) and the second belt (33), one end of the two second threaded rods (30) will move into the inside of the threaded sleeve (31) as the threaded sleeve (31) rotates, the second threaded rods (30) drive the two supporting bottom plates (17) to approach each other, the supporting bottom plates (17) drive the two side templates (1) and the connecting support plates (2) to approach each other through the support rods (18), so that the limit blocks (4) on both sides of the bottom template (3) will be inserted into the inside of the limit grooves (5), thereby completing the connection between the side template (1) and the bottom template (3); S3: The handlebar (14) is rotated, and the handlebar (14) drives a first threaded rod (13) to rotate. The first threaded rod (13) drives another first threaded rod (13) to rotate via a first pulley (15) and a first belt (16). Since the first threaded rod (13) is threadedly connected to the first movable plate (10), the first movable plate (10) moves outward along with the rotation of the first threaded rod (13). The first movable plate (10) drives one end of the plurality of first limiting rods (11) to leave the interior of the sealing connection groove (8), and the plurality of step plates (6) and the connecting baffle plate are connected. (7) are placed on the top of the two side templates (1) from bottom to top, so that the sealing connection plate (9) is inserted into the sealing connection groove (8), and then the handle (14) is rotated in the opposite direction. The handle (14) drives the first threaded rod (13) to rotate in the opposite direction. The first movable plate (10) drives the multiple first limiting rods (11) to be inserted into the first limiting holes (12) on the sealing connection plate (9) as the first threaded rod (13) rotates. In this way, the multiple step plates (6) and the connecting baffles (7) can be simultaneously limited and fixed, thus completing the support of the entire stair template.

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