Fabricated anti-seismic stair and construction method

Abstract

The invention relates to the technical field of building engineering, and discloses a fabricated anti-seismic stair and a construction method. Comprising a base arranged in a fixing groove of each floor platform; the stair plate is obliquely arranged between the bases of the upper and lower floors, and the two ends of the stair plate are rotationally connected to the bases; the step plate is arranged on the ladder plate, the step plate comprises a step plate and a support, one side of the step plate is provided with a first connecting seat and is rotatably connected to the support, and the support is slidably connected to the ladder plate; the adjusting assembly is arranged below the step plate, connected with the step plate and used for adjusting the levelness of the step plate; wherein an embedded part is arranged on the floor platform and located in the fixing groove, a counterbore allowing the embedded part to penetrate through is formed in the base, a first elastic part is arranged at the joint of the embedded part and the base, and a shock pad is arranged between the base and the floor platform. According to the stair, earthquake energy can be effectively absorbed, rigid impact between the floor platform and the stair is reduced, and the overall stability and safety of the stair are guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of construction engineering, and particularly to a prefabricated seismic-resistant staircase and a construction method thereof. Background Art

[0002] With the development and requirements of residential industrialization, prefabricated buildings have begun to be vigorously promoted. As the main vertical traffic and the main passage during emergency evacuation in a building, prefabricated staircases are one of the main indicators of the prefabrication rate of prefabricated buildings.

[0003] At present, prefabricated staircases are usually installed by reserving bolt holes. The seismic performance of prefabricated staircases is poor and they are prone to breakage during earthquakes, causing casualties. Summary of the Invention

[0004] In order to improve the problem that the current existing prefabricated staircases have poor seismic performance, resulting in the fracture of the staircase slab, this application provides a prefabricated seismic-resistant staircase and a construction method thereof.

[0005] A prefabricated seismic-resistant staircase and a construction method provided by this application adopt the following technical solutions:

[0006] A prefabricated seismic-resistant staircase includes:

[0007] A base, which is arranged in the fixed groove of each floor platform;

[0008] A staircase slab, which is inclined and arranged between the bases of the upper and lower floors, and both ends are rotatably connected to the bases;

[0009] A step slab, which is arranged on the staircase slab. The step slab includes a tread slab and a bracket. A first connecting seat is arranged on one side of the tread slab and is rotatably connected to the bracket, and the bracket is slidably connected to the staircase slab;

[0010] An adjusting assembly, which is arranged below the step slab and is connected to the tread slab for adjusting the level of the tread slab;

[0011] Among them, a pre-embedded part is arranged on the floor platform and within the fixed groove. A countersunk hole for the pre-embedded part to pass through is arranged on the base. A first elastic member is arranged at the connection between the pre-embedded part and the base, and a shock-absorbing pad is arranged between the base and the floor platform;

[0012] Step beams are arranged on both sides of the staircase slab. A plurality of guiding grooves are opened along the length direction on the step beams. A sliding rod is arranged through the plurality of guiding grooves in a penetrating manner; Support blocks are arranged at both ends of the bracket. The support blocks are embedded in the guiding grooves and are slidably matched with the sliding rod; Second elastic members are sleeved on both sides of the sliding rod where the support blocks are located.

[0013] By adopting the above technical solutions, the base and the floor platform are connected by means of fixing grooves, embedded parts, the first elastic member and shock pads, which can effectively buffer the impact force generated by earthquake loads, reduce the rigid connection stress between the floor and the base, and reduce the damage caused by rigid contact; both ends of the ladder board are rotatably connected to the base, and the combination of the tread board and the support rotating and the support sliding with the ladder board in the step board, in cooperation with the adjusting assembly, can flexibly adjust the structural posture during an earthquake, release stress and ensure that the tread board always remains horizontal, guaranteeing the safety of passage; the sliding limit structure composed of the step beam, the guide groove, the sliding rod, the support block and the second elastic member not only provides a sliding space for the support to adapt to earthquake displacement, but also limits excessive movement and absorbs vibration energy through the second elastic member, enhancing the overall stability of the staircase; in addition, the prefabricated design facilitates rapid installation and disassembly, effectively improving the construction efficiency and taking into account both seismic performance and engineering practicability.

[0014] Optionally, the adjusting assembly includes an adjusting rod, a lead screw, a nut, a slider and a support rod. The adjusting rod is rotatably connected to the ladder board. There are two lead screws, which are rotatably arranged on both sides of the ladder board. The adjusting rod is in transmission connection with the lead screws through bevel gears. The lead screws are in sliding fit with the nut. The nut is fixedly connected to the slider. Both ends of the support rod are respectively rotatably connected to the hinge seat of the slider and the second connection seat of the tread board.

[0015] By adopting the above technical solutions, the adjusting assembly adopts a structure combining bevel gear transmission and lead screw nut. By rotating the adjusting rod, the lead screw is driven to rotate through the bevel gear. The lead screw drives the nut to slide along its axial direction, and then drives the slider to move on the ladder board. Finally, the support rod pushes the tread board to rotate to achieve the adjustment of the levelness. This design can achieve precise fine adjustment of the levelness of the tread board, ensuring the safe and comfortable use of the staircase; the high efficiency of bevel gear transmission and the self-locking characteristic of the lead screw nut make the adjustment process stable and reliable, preventing adjustment loosening caused by external forces or long-term use; at the same time, the modular component design is convenient for installation, debugging and later maintenance, can quickly respond to the adjustment requirements under different working conditions, and effectively improves the overall performance and adaptability of the prefabricated staircase.

[0016] Optionally, sliding grooves are formed on both sides of the ladder board. The lead screws are arranged in the sliding grooves. The slider is slidably connected in the sliding grooves. Limiting blocks are arranged on both sides of the slider, and the limiting blocks are pressed against the edges of the sliding grooves.

[0017] By adopting the above technical solution, the slide grooves on both sides of the stair tread provide installation space and sliding tracks for the lead screw and the slider, limiting the movement direction of the slider and ensuring the precise and stable operation of the adjustment component; the limit blocks on both sides of the slider are crimped onto the edge of the slide groove to form a two-way limit, preventing the slider from lateral deviation or shaking during movement, while providing reliable support for the slider. During use, the limit blocks can efficiently transmit the pedal force exerted on the tread to the stair tread, preventing the lead screw from being subjected to excessive bending stress, significantly improving the overall bearing capacity and stability of the stair structure, and ensuring the safety and reliability of the stairs in long-term use.

[0018] Optionally, an extension component is provided at the connection between the support block and the sliding rod, and the extension component includes an extension block, a pushing block and a cam. The extension blocks are symmetrically and slidably arranged on both sides of the support block, and the extension block abuts against the second elastic member; a first through groove and a second through groove that are interconnected are provided in the support block, and the pushing block is slidably arranged in the first through groove; a wedge block is provided on the extension block and is slidably arranged in the second through groove, and the pushing block and the wedge block are matched through wedge surface transmission; the cam is fixedly connected to the first connecting seat, and the cam abuts against the end of the pushing block.

[0019] By adopting the above technical solution, efficient linkage between the adjustment component and the extension component is achieved. Through the contact transmission between the cam and the push block and the unique design of the wedge surface, the extension component can dynamically adjust the connection length between the support block and the slide rod according to the inclination angle of the stair tread. When the inclination angle of the stair tread changes, the force of the bracket along the slide rod direction changes accordingly. When the adjustment component leveling the step plate drives the cam to rotate, the push block and the extension block to slide in coordination, changing the compression degree of the second elastic member, effectively reducing the displacement of the bracket, so that the staircase can adapt to different working conditions, and improve the overall seismic performance and safety of use.

[0020] Optionally, extension tubes are provided on both sides of the support block, and the extension block is slidably sleeved on the extension tubes.

[0021] By adopting the above technical solution, the extension tubes arranged on both sides of the support block provide precise sliding guides for the extension block, ensuring that the direction of the extension block is stable and the path is accurate during the sliding process, avoiding deviation or shaking, thereby improving the accuracy and stability of the adjustment process; it can also enhance the connection strength between the two, so that when the extension block is subjected to external force, it can better transfer the force to the support block, thereby enhancing the bearing capacity of the entire support structure.

[0022] Optionally, the side of the bracket close to the step board is an arc-shaped end face, the step board is provided with a clamping block, the clamping block is provided with an arc-shaped groove, the arc-shaped end face of the bracket is clamped into the arc-shaped groove, and the bracket is provided with a clearance groove for the clamping block to move.

[0023] By adopting the above technical solution, the embedded fit between the clamping block and the arc-shaped groove enhances the stability of the connection, prevents the tread board from detaching or shifting, and at the same time, the arc-shaped contact surface can evenly disperse the force, improving the load-bearing capacity of the structure; the relief groove on the bracket provides a moving space for the components when they are deformed under force, ensuring the coordinated movement of each component, avoiding interference, reducing the risk of structural damage, and effectively improving the overall performance and service life of the staircase.

[0024] Optionally, the base includes base one and base two. Limiting bumps are provided at the bottoms of base one and base two and are clamped in the fixing grooves; an arc-shaped supporting groove is provided at the connection between base two and the ladder board, and the end of the ladder board is placed in the arc-shaped supporting groove.

[0025] By adopting the above technical solution, the limiting bumps at the bottoms of base one and base two are tightly clamped with the fixing grooves, accurately defining the position of the base, effectively preventing it from displacing in the horizontal direction, and laying a solid foundation for the overall construction of the staircase; the arc-shaped supporting groove provided on base two is adapted to the end of the ladder board, not only providing a reliable supporting surface for the ladder board, but also allowing the ladder board to rotate moderately with the arc-shaped groove as a support under the action of external forces such as earthquakes, releasing the structural stress, and avoiding local stress concentration caused by rigid connection.

[0026] Optionally, a plurality of grooves are arranged in an array at the bottom of the ladder board. The grooves divide the bottom of the ladder board into a mesh structure, and the protrusions between the grooves form reinforcing ribs.

[0027] By adopting the above technical solution, the design of arranging grooves in an array at the bottom of the ladder board and naturally forming reinforcing ribs has the dual advantages of structural strengthening and process optimization. The spaced arrangement of the grooves constructs a criss-cross reinforcing rib network at the bottom of the ladder board, significantly improving the bending and shear resistance of the ladder board. When bearing vertical loads and horizontal vibrations, it can effectively disperse the stress, avoiding local deformation or cracking; the combination of the grooves and the reinforcing ribs can also reduce the self-weight of the ladder board to a certain extent, optimize the material distribution, achieve lightweight under the premise of ensuring the load-bearing capacity, and further improve the seismic performance and installation convenience of the prefabricated seismic staircase.

[0028] A construction method of a prefabricated seismic staircase includes the following steps:

[0029] S1. Lay the shock-absorbing pad in the fixing groove on the floor platform, place the base on the shock-absorbing pad, align the embedded part with the countersunk hole on the base, place the first elastic member in the countersunk hole and sleeved on the embedded part, and press the pressure plate against the first elastic member and fixedly connect it to the embedded part;

[0030] S2. Install the adjusting component on the ladder board;

[0031] S3. Install the extension component in the support blocks at both ends of the bracket. The support blocks are placed in the guiding grooves. The second elastic member is arranged in the guiding grooves and on both sides of the bracket. Pass the sliding rod through the support blocks and the second elastic member, and fix the sliding rod.

[0032] S4. Install the tread plate on the bracket and the strut of the adjustment component.

[0033] S5. First, place the lower end of the ladder board in the arc-shaped supporting groove of the second base and fix it, and then connect the upper end of the ladder board to the second base.

[0034] S6. Use a tool to rotate the adjustment rod to adjust the level of the tread plate.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. Through the elastic connection between the base and the floor platform, the rotational connection between the ladder board and the base, and the adjustable sliding structure of the step board, the seismic impact force is effectively buffered, and the structural stress is released; the linkage design of the extension component and the adjustment component can dynamically adjust the support structure according to the change of the angle of the ladder board, and cooperate with the second elastic member to absorb the vibration energy, ensuring the stability of the staircase during an earthquake and guaranteeing the passage safety.

[0037] 2. The adjustment component adopts a helical gear drive and a lead screw nut structure, which can achieve precise fine adjustment of the levelness of the tread plate, and has a self-locking characteristic to prevent loosening during use; the sliding groove and the limiting block provide stable guidance and support for the adjustment component, avoiding the deformation of the lead screw under force; the arc-shaped clamping design between the bracket and the tread plate enhances the connection stability, evenly distributes the force, and improves the overall durability of the staircase.

[0038] 3. The groove and rib design at the bottom of the ladder board enhances the structural strength while reducing the self-weight, optimizing the material utilization; the assembled design enables each component to be quickly installed and disassembled, reducing the construction process; the modular components are convenient for later maintenance, significantly improving the construction efficiency, and taking into account the seismic performance and engineering practicability. Description of the Drawings

[0039] Figure 1 It is a schematic structural diagram of the assembled seismic staircase of the present application.

[0040] Figure 2 It is a schematic structural diagram of the connection between the base of the present application and the staircase platform.

[0041] Figure 3 It is a cross-sectional view of the assembled seismic staircase of the present application.

[0042] Figure 4 It is a schematic structural diagram of the ladder board of the present application.

[0043] Figure 5It is a schematic structural diagram of the step board of the present application connected to the adjustment component and the extension component.

[0044] Figure 6 It is Figure 3 an enlarged view of part A in

[0045] Figure 7 It is a schematic structural diagram inside the support block of the present application.

[0046] Figure 8 It is a schematic structural diagram of the tread board of the present application.

[0047] Figure 9 It is a schematic structural diagram of the ladder board of the present application connected to the second base.

[0048] Figure 10 It is a schematic structural diagram of the bottom of the prefabricated seismic staircase of the present application.

[0049] Reference numerals: 1, floor platform; 11, fixed groove; 12, embedded part; 13, pressing plate; 2, base; 21, first base; 22, second base; 221, arc-shaped supporting groove; 23, countersunk hole; 24, limiting convex block; 3, ladder board; 31, step beam; 311, guiding groove; 32, sliding rod; 33, sliding groove; 34, groove; 35, reinforcing rib; 4, step board; 41, bracket; 411, support block; 412, first through groove; 413, second through groove; 414, extension cylinder; 415, arc-shaped end face; 416, relief groove; 42, tread board; 421, first connecting seat; 422, second connecting seat; 423, clamping block; 424, arc-shaped groove; 5, adjustment component; 51, adjustment rod; 52, lead screw; 53, nut; 54, slider; 541, limiting block; 542, hinge seat; 55, support rod; 6, extension component; 61, extension block; 611, wedge-shaped block; 62, pushing block; 63, cam; 7, shock pad; 8, first elastic member; 9, second elastic member. Detailed implementation manners

[0050] The following details the implementation manners of the present application, and the examples of the implementation manners are shown in the drawings.

[0051] In the description of this specification, the description with reference to the terms "certain implementation manners", "one implementation manner", "some implementation manners", "schematic implementation manners", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0052] The present application discloses an assembled earthquake-resistant staircase, referring to Figures 1 - 5 , including a base 2, a ladder plate 3, a step plate 4 and an adjustment component 5, the base 2 is installed in the fixing groove 11 of each floor platform 1; the ladder plate 3 is tiltedly arranged between the bases 2 of the upper and lower floors, and the two ends of the ladder plate 3 are respectively hingedly connected to the base 2; the step plate 4 is horizontally installed on the ladder plate 3, and the step plate 4 includes a tread plate 42 and a bracket 41. A first connecting seat 421 is provided on one side of the tread plate 42 and is hingedly connected to the bracket 41, and the bracket 41 is slidably connected to the ladder plate 3; the adjustment component 5 is installed below the step plate 4 to adjust the level of the tread plate 42.

[0053] Among them, a plurality of embedded parts 12 are reserved on the floor platform 1 and located in the fixed groove 11, and the plurality of embedded parts 12 are evenly distributed in the fixed groove 11, and the embedded parts 12 are steel bars; a countersunk hole 23 for the embedded parts 12 to pass through is reserved on the base 2, a first elastic part 8 is sleeved on the embedded part 12 and placed in the countersunk hole 23, and the first elastic part 8 is a compression spring. During installation, it is crimped onto the first elastic part 8 through the pressure plate 13 and welded to the embedded part 12, and a shock-absorbing pad 7 is laid between the base 2 and the floor platform 1, and the shock-absorbing pad 7 is made of hard rubber.

[0054] Step beams 31 are provided on both sides of the ladder plate 3 to enhance the structural strength of the ladder plate 3. A plurality of equally spaced guide grooves 311 are reserved on the step beam 31 along its length direction. Slide rods 32 are provided through the plurality of guide grooves 311. The slide rods 32 are optical axes to reduce friction. Support blocks 411 are vertically provided at both ends of the bracket 41. The ends of the support blocks 411 are slidably embedded in the guide grooves 311. The support blocks 411 are slidably matched with the slide rods 32. Second elastic members 9 are provided in the guide grooves 311 and on both sides of the support blocks 411. The second elastic member 9 is sleeved on the slide rod 32. The two ends of the second elastic member 9 are respectively abutted against the support blocks 411 and the inner walls of the guide grooves 311. The second elastic member 9 is a compression spring.

[0055] Reference Figure 4 and Figure 5 The adjusting assembly 5 includes an adjusting rod 51, a screw rod 52, a nut 53, a slider 54 and a support rod 55. The adjusting rod 51 is rotatably connected to the ladder plate 3. Two screw rods 52 are provided and are rotatably arranged on both sides of the ladder plate 3. The adjusting rod 51 is located at one end of the screw rod 52. The two ends of the adjusting rod 51 are respectively connected to the screw rods 52 on both sides of the ladder plate 3 through bevel gears. The screw rod 52 is slidably matched with the nut 53. The nut 53 is fixedly connected to the slider 54. The two ends of the support rod 55 are respectively rotatably connected to the hinge seat 542 of the slider 54 and the second connecting seat 422 of the step plate 42.

[0056] Chute grooves 33 are reserved on both sides of the ladder slab 3. The lead screw 52 is rotatably installed at the bottom of the chute groove 33. The slider 54 is slidably arranged in the chute groove 33. Limiting blocks 541 are symmetrically arranged on both sides of the slider 54, and the limiting blocks 541 are pressed against the edges of the chute groove 33 to play a supporting role.

[0057] Refer to Figure 6 and Figure 7 , an extension assembly 6 is installed at the connection between the support block 411 and the sliding rod 32. The extension assembly 6 includes an extension block 61, a pushing block 62 and a cam 63. The extension block 61 is a cylindrical structure. The extension blocks 61 are symmetrically and slidably arranged on both sides of the support block 411. One end of the extension block 61 away from the support block 411 abuts against the second elastic member 9; a first through groove 412 and a second through groove 413 that communicate with each other are formed in the support block 411. The pushing block 62 is slidably installed in the first through groove 412. A wedge-shaped block 611 is integrally formed on the extension block 61. The wedge-shaped block 611 is slidably installed in the second through groove 413. The pushing block 62 and the wedge-shaped block 611 are in transmission cooperation through a wedge-shaped surface; the cam 63 is fixedly connected to the first connecting seat 421, and the cam 63 abuts against the end of the pushing block 62.

[0058] Extension cylinders 414 are fixedly connected to both sides of the support block 411, and the extension blocks 61 are slidably sleeved on the extension cylinders 414.

[0059] Refer to Figure 8 , one side of the support 41 close to the tread 42 is an arc-shaped end face 415. A clamping block 423 is arranged on the tread 42. An arc-shaped groove 424 is formed in the clamping block 423. The arc-shaped end face 415 of the support 41 is clamped into the arc-shaped groove 424. A relief groove 416 for the movement of the clamping block 423 is arranged on the support 41 to prevent interference between the clamping block 423 and the support 41 when the tread 42 rotates.

[0060] Refer to Figure 1 and Figure 9 , the base 2 includes a base one 21 and a base two 22. Limiting bumps 24 are arranged at the bottoms of the base one 21 and the base two 22 and are clamped in the fixing groove 11; an arc-shaped supporting groove 221 is arranged at the connection between the base two 22 and the ladder slab 3, and the end of the ladder slab 3 is placed in the arc-shaped supporting groove 221.

[0061] Refer to Figure 10 , a plurality of grooves 34 are arranged in an array at the bottom of the ladder slab 3. The grooves 34 divide the bottom of the ladder slab 3 into a mesh structure, and the protrusions between the grooves 34 form reinforcing ribs 35. Significantly improve the bending and shear resistance of the ladder slab 3 and avoid local deformation or cracking; at the same time, the combination of the grooves and the reinforcing ribs 35 can also reduce the self-weight of the ladder slab 3, achieve lightweight, and improve the installation convenience.

[0062] A construction method for an assembled earthquake-resistant staircase includes the following steps:

[0063] S1. Lay the shock-absorbing pad 7 in the fixing groove 11 of the floor platform 1, place the base 2 on the shock-absorbing pad 7, align the embedded part 12 with the counterbore 23 on the base 2, place the first elastic member 8 in the counterbore 23 and sleeved on the embedded part 12, and press the pressure plate 13 against the first elastic member 8 and fixedly connect it to the embedded part 12;

[0064] S2. Install the adjusting assembly 5 on the ladder board 3;

[0065] S3. Install the extension assembly 6 in the support blocks 411 at both ends of the bracket 41. The support blocks 411 are placed in the guiding grooves 311. The second elastic members 9 are arranged in the guiding grooves 311 and on both sides of the bracket 41. Pass the sliding rod 32 through the inside of the support block 411 and the second elastic members 9, and fix the sliding rod 32;

[0066] S4. Install the tread board 42 on the bracket 41 of the support and the support rod 55 of the adjusting assembly 5;

[0067] S5. First, place the lower end of the ladder board 3 in the arc-shaped supporting groove 221 of the second base 22 and fix it, and then connect the upper end of the ladder board 3 to the second base 22;

[0068] S6. Use a tool to rotate the adjusting rod 51 to adjust the level of the tread board 42.

[0069] The implementation principle of the prefabricated seismic-resistant staircase and construction method in the embodiment of the present application is as follows: The embedded part 12 of the floor platform 1 passes through the counterbore 23 of the base 2 and is flexibly connected to the base 2 through the first elastic member 8. Combined with the shock-absorbing pad 7 below the base 2, a double-layer buffer structure is formed, which can effectively absorb the impact force of seismic loads, reduce the rigid stress between the floor and the base 2, and avoid rigid contact damage. The limiting convex blocks 24 at the bottoms of the first base 21 and the second base 22 are clamped with the fixing groove 11 to limit the horizontal displacement; the arc-shaped supporting groove 221 of the second base 22 allows the end of the ladder board 3 to rotate, releasing the rotational stress during an earthquake and preventing local stress concentration.

[0070] Both ends of the ladder board 3 are rotatably connected to the base 2 and can rotate around the base 2 during an earthquake to adapt to displacement; the bracket 41 of the step board 4 is slidably matched with the sliding rod 32 of the ladder board 3 through the support block 411, and the second elastic members 9 on both sides limit excessive movement and absorb vibration energy. The bracket 41 is rotatably connected to the tread board 42. Combined with the dynamic adjustment of the adjusting assembly 5, the tread board 42 remains horizontal even when the ladder board 3 is inclined, ensuring the safety of passage. The mesh groove 34 structure (reinforcing rib 35) at the bottom of the ladder board 3 improves the bending and shear resistance performance, reduces the self-weight while enhancing the overall stiffness.

[0071] The adjusting assembly 5 drives the screw 52 to rotate through the helical gear transmission, drives the nut 53 and the slider 54 to slide along the slide groove 33, and pushes the step plate 42 to rotate through the support rod 55, so as to achieve precise fine adjustment of the horizontality. The self-locking characteristics of the screw 52 and the nut 53 and the two-way limit of the limit block 541 of the slider 54 ensure stable and reliable adjustment, avoid looseness or deviation caused by external force, and at the same time efficiently transmit the pedal force to the ladder plate 3 to improve the load-bearing capacity.

[0072] The extension assembly 6 dynamically adjusts the connection length between the support block 411 and the slide bar 32 according to the change of the inclination angle of the stair tread 3 through the contact transmission of the cam 63 and the push block 62, combined with the wedge surface structure. When the adjustment assembly 5 levels the tread 42, the cam 63 rotates to drive the extension block 61 to slide, changing the compression degree of the second elastic member 9, adaptively reducing the displacement of the bracket 41, so that the stairs remain stable under different working conditions and enhance seismic adaptability.

[0073] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An assembled earthquake-resistant staircase, characterized in that: include: A base (2) is arranged in a fixing groove (11) of each floor platform (1); The ladder board (3) is obliquely arranged between the bases (2) of the upper and lower floors, and the two ends are rotatably connected to the base (2); A step plate (4) is arranged on the ladder plate (3), the step plate (4) comprising a tread plate (42) and a bracket (41), a first connecting seat (421) is arranged on one side of the tread plate (42) and is rotatably connected to the bracket (41), and the bracket (41) is slidably connected to the ladder plate (3); An adjustment component (5) is disposed below the step plate (4) and connected to the step plate (42) and is used to adjust the level of the step plate (42); Wherein, an embedded part (12) is arranged on the floor platform (1) and located in the fixing groove (11), a countersunk hole (23) is arranged on the base (2) for the embedded part (12) to pass through, a first elastic part (8) is arranged at the connection between the embedded part (12) and the base (2), and a shock-absorbing pad (7) is arranged between the base (2) and the floor platform (1); Step beams (31) are provided on both sides of the ladder plate (3), and a plurality of guide grooves (311) are provided on the step beams (31) along the length direction, and a sliding rod (32) is provided through the plurality of guide grooves (311); support blocks (411) are provided on both ends of the bracket (41), and the support blocks (411) are embedded in the guide grooves (311) and slidably cooperate with the sliding rod (32); second elastic members (9) are sleeved on both sides of the support blocks (411) on the sliding rod (32).

2. The assembled earthquake-resistant staircase according to claim 1, characterized in that: The adjusting assembly (5) comprises an adjusting rod (51), a screw rod (52), a nut (53), a slider (54) and a support rod (55); the adjusting rod (51) is rotatably connected to the ladder plate (3); two screw rods (52) are provided and are rotatably arranged on both sides of the ladder plate (3); the adjusting rod (51) is transmission-connected to the screw rod (52) through a bevel gear; the screw rod (52) and the nut (53) are slidably matched; the nut (53) is fixedly connected to the slider (54); and two ends of the support rod (55) are rotatably connected to a hinge seat (542) of the slider (54) and a second connecting seat (422) of the step plate (42) respectively.

3. The assembled earthquake-resistant staircase according to claim 2, characterized in that: The ladder plate (3) is provided with a slide groove (33) on both sides, the screw rod (52) is arranged in the slide groove (33), the slider (54) is slidably connected in the slide groove (33), and the slider (54) is provided with a limit block (541) on both sides of the slider (54), and the limit support block (411) is pressed against the edge of the slide groove (33).

4. The assembled earthquake-resistant staircase according to claim 1, characterized in that: An extension component (6) is provided at the connection between the support block (411) and the slide rod (32), and the extension component (6) includes an extension block (61), a push block (62) and a cam (63). The extension block (61) is symmetrically and slidably arranged on both sides of the support block (411), and the extension block (61) abuts against the second elastic member (9); a first through groove (412) and a second through groove (413) which are interconnected are provided in the support block (411), and the push block (62) is slidably arranged in the first through groove (412); a wedge block (611) is provided on the extension block (61) and is slidably arranged in the second through groove (413), and the push block (62) and the wedge block (611) are matched through wedge surface transmission; the cam (63) is fixedly connected to the first connecting seat (421), and the cam (63) abuts against the end of the push block (62).

5. The assembled earthquake-resistant staircase according to claim 4, characterized in that: Extension tubes (414) are provided on both sides of the support block (411), and the extension block (61) is slidably sleeved on the extension tubes (414).

6. The assembled earthquake-resistant staircase according to claim 1, characterized in that: The side of the bracket (41) close to the stepping board (42) is an arc-shaped end surface (415), the stepping board (42) is provided with a clamping block (423), the clamping block (423) is provided with an arc-shaped groove (424), the arc-shaped end surface (415) of the bracket (41) is clamped into the arc-shaped groove (424), and the bracket (41) is provided with a clearance groove (416) for the clamping block (423) to move.

7. The assembled earthquake-resistant staircase according to claim 1, characterized in that: The base (2) comprises a base (2) 1 and a base (22); the base (21) and the base (22) are both provided with limiting protrusions (24) at their bottoms and are clamped in the fixing grooves (11); an arc-shaped supporting groove (221) is provided at the connection between the base (22) and the ladder plate (3); the end of the ladder plate (3) is placed in the arc-shaped supporting groove (221).

8. The assembled earthquake-resistant staircase according to claim 1, characterized in that: The bottom of the ladder plate (3) is provided with a plurality of grooves (34) in an array, the grooves (34) divide the bottom of the ladder plate (3) into a mesh structure, and the protrusions between the grooves (34) form reinforcing ribs (35).

9. A construction method for an assembled seismic-resistant staircase according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Lay the shock-absorbing pad (7) in the fixing groove (11) of the floor platform (1), place the base (2) on the shock-absorbing pad (7), align the embedded part (12) with the countersunk hole (23) on the base (2), place the first elastic part (8) in the countersunk hole (23) and sleeve it on the embedded part (12), press the pressing plate (13) onto the first elastic part (8) and fix the embedded part (12) in connection; S2, installing the adjustment assembly (5) on the ladder plate (3); S3, installing the extension assembly (6) in the support blocks (411) at both ends of the bracket (41), placing the support blocks (411) in the guide groove (311), and setting the second elastic member (9) in the guide groove (311) and on both sides of the bracket (41), passing the slide bar (32) through the support block (411) and the second elastic member (9), and fixing the slide bar (32); S4, installing the stepping plate (42) on the bracket (41) and the support rod (55) of the adjustment assembly (5); S5, first place the lower end of the ladder plate (3) in the arc-shaped supporting groove (221) of the second base (22) and fix it, and then connect the upper end of the ladder plate (3) to the second base (22); S6. Use a tool to rotate the adjusting rod (51) to adjust the level of the stepping plate (42).

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