Prefabricated stair installation method

Abstract

The present application discloses a prefabricated stair structure and an installation method thereof, relating to the field of stair structures, which comprises a stair tread and a wall movably arranged at one end of the stair tread, wherein the end of the stair tread close to the wall is fixedly provided with a fixing mechanism for connecting the stair tread one to the wall, the end of the stair tread one facing away from the wall is movably provided with a stair tread two, and the end of the stair tread one close to the stair tread two is fixedly provided with a reinforcement mechanism for connecting the stair tread one to the stair tread two; the fixing mechanism comprises a fixing block and a support plate slidingly penetrated at the lower end of the fixing block, a rack meshed with the top of the support plate is rotatably provided on one side of the upper end of the fixing block, and a cross block meshed with the spur gear is slidably provided on the middle part of the upper end of the fixing block; the present application realizes the synchronous fixing of the stair tread one and the stair tread two, so that the entire stair structure forms a stable whole, thereby improving the convenience and accuracy of stair installation.

Description

Technical Field

[0001] The present application relates to structural components and building materials, and more specifically to the field of staircase structures, and in particular to a method for installing prefabricated stairs. Background Art

[0002] A prefabricated staircase structure is one in which the stairs are prefabricated in a factory and then transported to the construction site for installation. This improves construction efficiency and shortens project cycles. The factory strictly controls quality to ensure the precision and durability of the components. Furthermore, it reduces on-site costs and minimizes pollution and resource waste caused by wet operations.

[0003] The current prefabricated staircase structures are mostly composed of stair slabs, platform slabs and platform beams. During the hoisting process, the overall weight of the stairs is too heavy, which makes the hoisting operation difficult. In addition, in a limited space and complex construction environment, the excessive weight makes it difficult to accurately control the installation position and angle of the stairs. If you are not careful, it is very easy to cause collisions between components, resulting in damage to the prefabricated staircase components, affecting the building quality and service life, and increasing construction risks. Summary of the Invention

[0004] In order to improve the problem that the prefabricated staircase structure is too heavy, resulting in difficulty in lifting and difficulty in accurately controlling the installation position, the present application provides a prefabricated staircase installation method.

[0005] The present application provides a method for installing prefabricated stairs using the following technical solutions:

[0006] A method for installing a prefabricated staircase includes a first staircase and a wall on which one end of the first staircase is movably mounted, wherein an end of the first staircase close to the wall is fixedly provided with a fixing mechanism for connecting the first staircase to the wall, an end of the first staircase facing away from the wall is movably provided with a second staircase, and an end of the first staircase close to the second staircase is internally fixed with a reinforcement mechanism for connecting the first staircase to the second staircase.

[0007] The top end face of the fixing plate is fixed with the fixing block and the fixing block is fixed with the fixing block on the side close to the stair plate. The fixing block is fixed with the stair plate on one side of the fixing block, and a spur gear meshed with the top of the support plate is rotatably provided on the upper side of the fixing block. The middle part of the upper end of the fixing block is slidably provided with a cross block meshing with the spur gear; the reinforcing mechanism includes a fixing rod and a limit block 1 slidably arranged at both ends of the fixing rod, and the fixing rod is fixed to the support plate near one end of the fixing rod and the support plate. The upper and lower ends of the two limit blocks 1 are movably provided with a transmission rod 1 and a transmission rod 2 respectively; a limit block 2 is provided at each end of the fixing rod away from the support plate, and a clamping block is slidably passed through the middle of the two limit blocks 2. The two clamping blocks are fixed with a rectangular block on the opposite side of one end away from the limit block 2;

[0008] The following steps are also included:

[0009] S1. When installing the stairs, first use a crane to lift both ends of the stair tread 1, insert the fixing mechanism into the fixing groove 1 on the wall surface, and then use steel wire ropes to preliminarily fix the stair tread 1 and the wall;

[0010] S2. Then, lift both ends of the second stair tread and move the second stair tread toward the first stair tread. After the steel bars on one side of the first stair tread are inserted into both ends of one side of the second stair tread, push the second stair tread to drive the first stair tread toward the wall, so that the supporting plate moves under the longitudinal force, driving the cross block upward to be clamped into the cross groove above the fixing groove one, and at the same time driving the two clamping blocks and the two rectangular blocks to move relative to each other. A clamping groove is provided on the upper end of the side of the second stair tread close to the first stair tread, and a clamping block is fixed in the middle of the clamping groove. A groove is provided in the middle of the clamping block, and the shape of the groove matches the shape of the rectangular block, so that the two rectangular blocks are clamped into the middle of the clamping block;

[0011] S3. Finally, pour cement mortar into grouting hole 1 and grouting hole 2 of stair slab 1 and grouting hole 3 of stair slab 2 to strengthen the connection between stair slab 1, stair slab 2 and the wall.

[0012] By adopting the above technical solution, the fixing mechanism realizes a stable connection between the stair tread 1 and the wall through the cooperation of the fixing block, the support plate and the cross block with the spur gear. The reinforcement mechanism is arranged inside the connection end of the stair tread 1 and the stair tread 2, so as to strengthen the connection between the stair tread 1 and the stair tread 2. The reinforcement mechanism realizes the reinforcement and stable transmission of the connection between the stair tread 1 and the stair tread 2 through the fixing rod and the slidable limit block 1 at both ends, and the transmission rod 1 and the transmission rod 2 at the upper and lower ends of the limit block 1. The limit block 2 slides inside and passes through the clamping block, and is cooperated with the rectangular block on the opposite side of the clamping block end to form a clamping limit and structural strengthening effect on the stair tread connection area.

[0013] Preferably, a fixing groove 2 is formed at one end of the stair tread 1 facing away from the wall, and opposite sides of the two limiting blocks 2 are fixed to the inner walls on both sides of the fixing groove 2.

[0014] By adopting the above technical solution, the structure provides support for the second limit block and related components, ensuring the reliability and stability of the structure at the connection between the first stair tread and the second stair tread.

[0015] Preferably, the end of the stair board facing away from the wall is located above the fixing groove 2 and has rectangular grooves on both sides. The inner bottom surface of the two rectangular grooves and the top of the two limit blocks 1 are fixed with a fixing column 1 that rotates through the two ends of the two transmission rods 1.

[0016] By adopting the above technical solution, the structure provides a stable fulcrum and rotation path for the transmission rod 1 through the cooperation of the rectangular groove, the fixing column 1 and the transmission rod 1.

[0017] Preferably, the bottom ends of the two limiting blocks 1 and the bottom ends of the two clamping blocks on the side close to the fixed rod are fixed with fixed columns 2 that rotate and pass through the two ends of the two transmission rods 2.

[0018] By adopting the above technical solution, fixed column two serves as the rotation fulcrum of transmission rod two, so that the transmission rod can rotate around fixed column two, thereby driving the clamping block to slide in limit block two, thereby achieving the clamping and fixing of stair board two by the clamping block.

[0019] Preferably, the end of the support plate away from the fixing block slides through the stair tread 1.

[0020] By adopting the above technical solution, the support plate penetrates the stair tread one to achieve the preset depth of the fixed block and the stair tread one. The design of the support plate facilitates sliding inside the stair tread one under the action of external force. During installation, it cooperates with other components of the fixing mechanism to achieve a stable connection with the wall and support for the stair tread one.

[0021] Preferably, both ends of the stair tread 1 on the side close to the stair tread 2 are fixed with steel bars passing through the stair tread 2.

[0022] By adopting the above technical solution, the steel bar runs through the second stair tread, thereby enhancing the connection strength between the first stair tread and the second stair tread.

[0023] Preferably, the fixing mechanism and the steel bars act as beams and support the first and second stair treads.

[0024] By adopting the above technical solution, the cooperation between the fixing mechanism and the steel bars provides support for the stair treads one and two, thereby ensuring the stability of the stair structure.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. Use a crane to lift the stair tread 1, embed the fixing block into the fixing groove 1 of the wall, and lift the stair tread 2 after temporarily fixing it with a wire rope. Ensure that the stair tread 1 remains stable during the subsequent lifting of the stair tread 2 and will not be displaced or shaken due to external forces. Insert the steel bar into the stair tread 2, and the support plate drives the spur gear to make the cross block fit into the cross groove, providing an important fixing point for the stair structure and enhancing the overall stability of the stairs. At the same time, it drives the fixing rod to move, so that the rectangular block is embedded in the card block, realizing the synchronous fixation of the stair tread 1 and the stair tread 2, so that the entire stair structure forms a stable whole, improving the convenience and accuracy of the stair installation, and enhancing the safety and reliability of the stairs during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an overall axonometric diagram of the present application;

[0028] Figure 2 This is a partial structural exploded view of this application;

[0029] Figure 3 This is a structural diagram of the fixing mechanism and reinforcement mechanism of this application;

[0030] Figure 4 This is a partial structural diagram of the fixing mechanism of this application;

[0031] Figure 5 This is a partial structural diagram of the reinforcement mechanism of this application;

[0032] Figure 6 This is a schematic diagram of the internal structure of the stair tread 1 of this application;

[0033] Figure 7 A partial cross-sectional view of this application;

[0034] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0035] Figure 9 for Figure 7 Enlarged view of point B in the middle.

[0036] Reference numerals: 1, stair tread 1; 2, fixing mechanism; 3, reinforcement mechanism; 4, stair tread 2; 5, wall; 6, fixing groove 1; 7, cross groove; 8, grouting hole 1; 9, grouting hole 2; 10, reinforcement; 11, grouting hole 3; 12, slide 1;

[0037] 201, fixed block; 202, support plate; 203, cross block; 204, spur gear; 205, grouting hole; 206, movable slot; 207, second slideway; 208, grouting cavity;

[0038] 301. Fixed rod; 302. Limit block 1; 303. Transmission rod 1; 304. Transmission rod 2; 305. Limit block 2; 306. Clamping block; 307. Rectangular block; 308. Fixed slot 2; 309. Rectangular slot; 310. Fixed column 1; 311. Fixed column 2; 313. Slot; 314. Block. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1-9 This application is described in further detail.

[0040] An embodiment of the present application discloses a method for installing a prefabricated staircase.

[0041] Example 1

[0042] Reference Figure 1 、 Figure 2The prefabricated stair installation method of the present application belongs to structural components and building materials, and provides a prefabricated stair installation method, including a stair tread 1 and a wall 5 movably arranged at one end of the stair tread 1, a fixing mechanism 2 is fixedly provided at the end of the stair tread 1 close to the wall 5, and a fixing groove 6 corresponding to the fixing mechanism 2 is opened on the side of the wall 5 facing the fixing mechanism 2, the fixing mechanism 2 is used to fix the stair tread 1 to the wall 5, and a stair tread 2 4 is movably provided at the end of the stair tread 1 facing away from the wall 5, and a reinforcement mechanism 3 is fixed inside the end of the stair tread 1 close to the stair tread 2 4, and the reinforcement mechanism 3 is used to fix the stair tread 1 to the stair tread 2 4, and both the fixing mechanism 2 and the reinforcement mechanism 3 are made of structural steel or other construction steel materials; after the fixing mechanism 2 and the reinforcement mechanism 3 are installed in place, the docking end faces of the stair tread 1 and the wall 5, as well as the docking end faces of the stair tread 1 and the stair tread 2 4 are tightly fitted without gaps.

[0043] Before the installation of the stair structure, a fixing groove 6 and a cross groove 7 are formed on the wall 5 corresponding to each step of the stairs through a cast-in-place concrete mold. After the cement mortar is completely solidified, the mold is removed. The fixing mechanism 2 and the reinforcement mechanism 3 are fixed to both sides of the stair tread 1 through unified prefabrication in the factory, and a grouting hole 18 and a grouting hole 29 are opened at the top of the stair tread 1, and a grouting hole 3 11 is opened on both sides of the top of the stair tread 2 4. The two ends of the stair tread 1 are hoisted by a crane so that the fixing mechanism 2 is accurately inserted into the fixing groove 6, and the stair tread 1 is preliminarily fixed with a steel wire rope. The two ends of the stair tread 2 4 are hoisted by a crane so that the steel bar 10 is inserted into the circular groove on one side of the stair tread 2 4, and then the stair tread 2 4 is pushed toward the wall 5 to drive the stair tread 1 close to the wall 5, so that the fixing mechanism 2 is completely inserted into and fixed in the fixing groove 6, and at the same time, the reinforcement mechanism 3 fixes the stair tread 2 4, and cement mortar is injected into the grouting hole 1 8, the grouting hole 2 9 and the grouting hole 3 11 and sealed.

[0044] Reference Figure 3 、 Figure 4 The fixing mechanism 2 includes a fixing block 201 and a support plate 202 that is slidably provided at the lower end of the fixing block 201 and is fixed to the stair plate 1 on the side close to the stair plate 1. A movable groove 206 is provided in the middle of the upper end of the fixing block 201, and a second slide groove 207 is provided in the middle of the lower end of the fixing block 201. The movable groove 206 is connected to the second slide groove 207. The support plate 202 slides inside the second slide groove 207, and the shape of the second slide groove 207 is adapted to the shape of the support plate 202 (such as Figure 4As shown), a spur gear 204 is rotatably provided on the inner wall of one side of the movable groove 206, and a rotating shaft is fixedly passed through the middle of the spur gear 204. The two ends of the rotating shaft are rotatably connected to the inner walls of both sides of the end of the movable groove 206 close to the wall 5. A meshing groove 1 is provided in the middle of the top of the support plate 202. The length of the meshing groove 1 is equal to the distance when the fixed block 201 is fully inserted into the fixed groove 1 6. The meshing groove 1 meshes with the gear teeth on the surface of the spur gear 204. A cross block 203 is slidably provided on the inner wall of the movable groove 206. The shape of the cross block 203 is adapted to the shape of the movable groove 206 (as shown). Figure 4 As shown), a meshing groove 2 is provided on one side of the cross block 203 close to the spur gear 204, and the meshing groove 2 is engaged with the gear teeth on the surface of the spur gear 204, and the support plate 202 is located directly below the spur gear 204 and the cross block 203.

[0045] When in use, the fixing mechanism 2 drives the support plate 202 to move toward the wall 5, so that the side of the support plate 202 close to the fixing groove 6 contacts the inner wall of the side of the fixing groove 6, and the fixing mechanism 2 is continuously moved to push the support plate 202 toward the stair plate 1, thereby driving the spur gear 204 to rotate, so that the cross block 203 moves upward. When the spur gear 204 is in the meshing groove at the top end of the support plate 202 close to the wall 5, the cross block 203 is completely embedded in the cross groove 7, and the support plate 202 drives the stair plate 1 to fit tightly and fix with the wall 5. When the spur gear 204 is in the meshing groove at the top end of the support plate 202 away from the wall 5, the support plate 202 drives the stair plate 1 to separate from the wall 5, so that the two grouting holes 205 are exposed in the grouting hole 8.

[0046] A grouting cavity 208 is provided in the middle of one end of the support plate 202 close to the wall 5, and grouting holes 205 are provided on both sides of the meshing groove 1 at the top of the support plate 202. The two grouting holes 205 are connected to the grouting cavity 208. The grouting holes 205 and the grouting cavity 208 are used to fill cement mortar into the connection between the stair plate 1 and the wall 5 when the support plate 202 is moved to a suitable position; a fixing groove 6 is provided on the fixing mechanism 2 on the side of the wall 5 facing the stair plate 1, and the depth of the fixing groove 6 is equal to three-fifths of the thickness of the wall 5. The inner top surface and the inner bottom surface of the fixing groove 6 are both provided with a cross groove 7 that matches the shape of the cross block 203. 3 has a chamfered edge on the top surface to facilitate the smooth sliding of the cross block 203 into the cross groove 7; the cross groove 7 located at the top is used to stably clamp the cross block 203 when the cross block 203 rises, and the cross groove 7 located at the bottom is used to enhance the stability between the stair slab 1 and the wall 5 when the cement mortar enters the interior of the wall 5. A grouting hole 8 is opened on the side of the top of the stair slab 1 close to the wall 5. The grouting hole 8 is located directly above the two grouting holes 205 when the support plate 202 moves to the preset position, so as to expose the two grouting holes 205. After the stair slab 1 and the wall 5 are fixed, cement mortar is poured in to make the connection between the stair slab 1 and the wall 5 more stable.

[0047] When the two grouting holes 205 are completely exposed in the grouting hole 8, it means that the support plate 202 has moved to the preset position. Then, cement mortar is poured into the grouting hole 8. The cement mortar flows into the fixed groove 6, the cross groove 7, the movable groove 206 and the slide groove 207 through the grouting hole 205 and the grouting cavity 208 to reinforce the connection between the wall 5 and the stair slab 1. Then, a sealing plug is used to seal the grouting hole 8 to prevent the cement mortar from overflowing.

[0048] Reference Figure 5-Figure 9 , 1 is provided with a second fixing groove 308 on the side away from the fixing mechanism 2, the stair plate 1 is provided with a rectangular groove 309 above the second fixing groove 308, and the stair plate 1 is provided with a chute 12 in the middle of the second fixing groove 308. The shape of the chute 12 is adapted to the specific shape and position distribution of the support plate 202 (such as Figure 6As shown), the chute 12 is connected to the chute 207, and the end of the support plate 202 away from the fixed block 201 slides through the inside of the stair plate 1 through the chute 12. The top of the stair plate 1 is located just above the fixing groove 208 and has a grouting hole 29. The grouting hole 29 is used to inject cement mortar for reinforcement after the stair plate 24 is fixed to the grouting hole 311; the reinforcement mechanism 3 includes a fixing rod 301 and a limit block 301 slidably arranged at both ends of the fixing rod 301. 2. One end of the fixing rod 301 close to the support plate 202 is fixed to the support plate 202. The top of the two limit blocks 302 and the inner bottom surface of the two rectangular grooves 309 are fixed with fixing columns 1 310. The bottom ends of the two fixing columns 1 310 close to the two limit blocks 1 302 are respectively fixed to the top of the two limit blocks 1 302, and the ends of the two fixing columns 1 310 away from the two limit blocks 1 302 are respectively fixed to the inner top surface and inner bottom surface of the two rectangular grooves 309.

[0049] The movement of the support plate 202 pushes the fixed rod 301 toward the stair plate 24, thereby causing the two limit blocks 1 302 to slide in opposite directions, causing the two transmission rods 1 303 to rotate around the fixed columns 1 310 at the top of the two limit blocks 1 302. At the same time, the two transmission rods 2 304 rotate around the two fixed columns 2 311 at the bottom of the two fixed columns 1 310, thereby driving the two clamping blocks 306 to slide in opposite directions inside the limit block 2 305.

[0050] The upper and lower ends of the two limit blocks 302 are respectively movably provided with a transmission rod 1 303 and a transmission rod 2 304, and the two ends of the two transmission rods 1 303 are respectively symmetrically rotatably sleeved on the four fixed columns 1 310, and the bottom ends of the two limit blocks 1 302 and the bottom ends of the two clamping blocks 306 close to the limit block 2 305 are fixed with fixed columns 2 311, and the two ends of the two transmission rods 2 304 are respectively symmetrically rotatably sleeved on the four fixed columns 2 311; the two ends of the fixed rod 301 on the side away from the support plate 202 are movably provided with limit blocks 2 305, and the opposite sides of the two limit blocks 2 305 are fixed to the middle parts of the inner walls of the fixing groove 2 308, and the middle parts of the two limit blocks 2 305 are slidably provided with clamping blocks 306 of the shape of the clamping blocks 306 (such as Figure 3 As shown in the figure, a rectangular block 307 is fixed on the opposite side of the two clamping blocks 306 away from one end of the limit block 2 305; the fixed rod 301 converts the linear displacement into a lateral clamping movement of the clamping blocks 306 through the compound lever movement of the limit block 1 302, the transmission rod 1 303, and the transmission rod 2 304; the movement distance of the fixed rod 301 is equal to the sliding distance of the clamping block 306 inside the limit block 2 305. When the fixed rod 301 moves to the limit distance, the two rectangular blocks 307 fit together.

[0051] At the same time, the two rectangular blocks 307 are driven to move in opposite directions, so that the two rectangular blocks 307 move towards the direction of the second stair tread 4 and at the same time move in opposite directions to the groove in the middle of the clamping block 314, thereby firmly fixing the second stair tread 4 and the first stair tread 1.

[0052] A slot 313 is provided at the upper end of the side of the stair tread 2 4 close to the stair tread 1, and a block 314 is fixed in the middle of the slot 313. A groove is provided in the middle of the block 314, and the shape of the groove is adapted to the shape of the rectangular block 307, which is used to clamp the two rectangular blocks 307 when the two rectangular blocks 307 are close to each other; steel bars 10 are fixed at both ends of the side of the stair tread 1 close to the stair tread 2 4, and circular grooves are provided on the stair tread 2 4 at the corresponding positions of the two steel bars 10, and the two steel bars 10 are inserted in the two circular grooves. The top of the stair tread 2 4 is located in the middle directly above the two steel bars 10, and a grouting hole three 11 is provided. The grouting hole three 11 is used to reinforce the steel bars 10 and the circular groove by pouring cement mortar into the circular groove when the steel bars 10 are inserted in the circular groove.

[0053] After cement mortar is injected into grouting hole 1 8 , cement mortar is poured into grouting hole 2 9 and grouting hole 3 11 . The cement mortar flows through grouting hole 2 9 and grouting hole 3 11 into the gap at the connection between stair slab 1 and stair slab 2 4 , as well as into the gap between steel bar 10 and circular groove. Then grouting hole 2 9 and grouting hole 3 11 are sealed with sealing plugs.

[0054] The implementation principle of a prefabricated stair installation method according to an embodiment of the present application is as follows: lift the two ends of the stair tread 1 by a crane, insert the fixing mechanism 2 into the fixing groove 6 and perform preliminary fixing with a steel wire rope; then lift the two ends of the stair tread 2 4, insert the steel bar 10 into the circular groove on one side of the stair tread 2 4, push the stair tread 2 4 to drive the stair tread 1 close to the wall 5, so that the fixing mechanism 2 drives the support plate 202 to move, so that the support plate 202 contacts the inner wall of the fixing groove 6, and then drives the spur gear 204 to rotate to make the cross block 203 rise. When the cross block 203 is completely embedded in the cross groove 7, the two grouting holes 205 will be exposed in the grouting hole 8, and the support plate 202 simultaneously drives the fixing rod 301 to move toward the stair tread 2 4, so that the limit block 1 302 moves along the fixing groove 6. The rod 301 slides, causing the transmission rod 1 303 and the transmission rod 2 304 to transmit, thereby driving the clamping block 306 and the rectangular block 307 to move in relative directions, so that the two rectangular blocks 307 are clamped in the clamping block 314; cement mortar is poured into the grouting hole 1 8, and the cement mortar flows into the fixed groove 1 6 and the cross groove 7, the movable groove 206 and the slide groove 2 207 through the grouting hole 205 and the grouting cavity 208, so that the gap at the connection between the wall 5 and the stair slab 1 is sealed and reinforced, and cement mortar is poured into the grouting hole 2 9 and the grouting hole 3 11, and the cement mortar flows into the connection between the stair slab 1 and the stair slab 2 4 and the gap between the steel bar 10 and the circular groove, and then the grouting hole 1 8, the grouting hole 2 9 and the grouting hole 3 11 are sealed with sealing plugs to prevent the cement mortar from overflowing.

[0055] Example 2

[0056] A prefabricated stair installation method, applied to the above-mentioned prefabricated stair installation method,

[0057] The following steps are involved:

[0058] S1. When stair slab 1 is hoisted to the side of wall 5, the position of stair slab 1 is monitored in real time using a laser positioning device, allowing the operator to precisely control the crane, gradually bringing stair slab 1 closer to wall 5, inserting fixing mechanism 2 into fixing groove 6, and then temporarily fixing stair slab 1 and wall 5 using a steel wire rope. When the worker wraps the steel wire rope around the fixing points of stair slab 1 and wall 5 and applies a certain amount of tension, friction is generated between the steel wire rope and the surface of stair slab 1, preventing stair slab 1 from shifting during the subsequent installation process.

[0059] When the stair tread 2 is about to be lifted, the stair tread 2 is moved along the predetermined trajectory toward the stair tread 1. When the stair tread 2 is about to be lifted, the operator adjusts the position of the stair tread 2 by visual observation and with the help of measuring tools, so that the steel bar 10 on one side of the stair tread 1 is aligned with the corresponding positions at both ends of the stair tread 2, and the steel bar 10 is inserted into the circular groove on one side of the stair tread 2. Subsequently, the operator pushes the stair tread 2. Since the stair tread 1 and the wall 5 are initially fixed by the steel wire rope, the vertical displacement of the stair tread 1 is limited, so that the stair tread 1 is moved horizontally toward the wall 5, so that the support plate 202 is longitudinally moved by the force, driving the spur gear 204 to rotate, so that the cross block 203 moves up and is embedded in the cross slot 7, and at the same time, the clamping block 306 and the rectangular block 307 move in relative directions and are stuck in the groove in the middle of the clamping block 314.

[0060] S3. After cement mortar is poured into grouting hole 18, grouting hole 29 of stair slab 1 and grouting hole 311 of stair slab 24, the cement mortar uses its own fluidity and filling properties to quickly penetrate into the tiny gaps and cracks between the components, and then the grouting hole 18, grouting hole 29 and grouting hole 311 are sealed to prevent the cement mortar from overflowing.

[0061] The above are merely optional embodiments of the present application and are not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for installing a prefabricated staircase, characterized in that: The invention comprises a stair tread (1) and a wall (5) movably arranged at one end of the stair tread (1), wherein a fixing mechanism (2) for connecting the stair tread (1) and the wall (5) is fixedly provided at one end of the stair tread (1) close to the wall (5), a stair tread (4) is movably arranged at one end of the stair tread (1) away from the wall (5), and a reinforcing mechanism (3) for connecting the stair tread (1) and the stair tread (4) is fixedly provided inside one end of the stair tread (1) close to the stair tread (4); The fixing mechanism (2) comprises a fixing block (201) and a support plate (202) which is slidably provided at the lower end of the fixing block (201) and is penetrated by a support plate; the fixing block (201) is fixed to the stair plate (1) at a side close to the stair plate (1); a spur gear (204) which is meshed with the top end of the support plate (202) is rotatably provided at one side of the upper end of the fixing block (201); and a cross block (203) which is meshed with the spur gear (204) is slidably provided at the middle part of the upper end of the fixing block (201); The reinforcing mechanism (3) comprises a fixing rod (301) and a limiting block (302) slidably arranged at both ends of the fixing rod (301); an end of the fixing rod (301) close to the support plate (202) is fixed to the support plate (202); and a transmission rod (303) and a transmission rod (304) are movably arranged at the upper and lower ends of the two limiting blocks (302); The two ends of the fixed rod (301) facing away from the support plate (202) are both provided with limit blocks (305), the middle parts of the two limit blocks (305) are both provided with clamping blocks (306) that slide through, and the two clamping blocks (306) are both fixed with rectangular blocks (307) on the opposite side of the ends away from the limit block (305); The following steps are also included: S1. When installing the stairs, first use a crane to lift the two ends of the stair slab (1), insert the fixing mechanism (2) into the fixing groove (6) on the surface of the wall (5), and then use a steel wire rope to preliminarily fix the stair slab (1) and the wall (5); S2, then lift the two ends of the stair slab 2 (4) and move the stair slab 2 (4) toward the stair slab 1 (1). After the steel bar (10) on one side of the stair slab 1 (1) is partially inserted into the two ends of one side of the stair slab 2 (4), push the stair slab 2 (4) to drive the stair slab 1 (1) toward the wall (5), so that the support plate (202) is moved by the longitudinal force, driving the cross block (203) to move upward into the cross groove (7) above the fixing groove 1 (6), and at the same time driving the two clamping blocks (306) and the two rectangular blocks (307) to move relative to each other. A slot (313) is provided at the upper end of one side of the stair slab 1 (1), and a block (314) is fixed in the middle of the slot (313). A groove is provided in the middle of the block (314), and the shape of the groove is adapted to the shape of the rectangular block (307), so that the two rectangular blocks (307) are clamped into the middle of the block (314); S3. Finally, cement mortar is poured into the grouting holes 1 (8) and 2 (9) of the stair slab 1 (1) and the grouting holes 3 (11) of the stair slab 2 (4) to reinforce the connection between the stair slab 1 (1), the stair slab 2 (4) and the wall (5).

2. A prefabricated staircase installation method according to claim 1, characterized in that: A fixing groove 2 (308) is provided at one end of the stair tread 1 (1) facing away from the wall (5), and opposite sides of the two limiting blocks 2 (305) are fixed to the inner walls of the fixing groove 2 (308).

3. A prefabricated staircase installation method according to claim 2, characterized in that: The end of the stair slab (1) facing away from the wall (5) is located above the fixing groove (308) and has rectangular grooves (309) on both sides. The inner bottom surfaces of the two rectangular grooves (309) and the top ends of the two limit blocks (302) are fixed with fixed columns (310) that rotate and pass through the two ends of the two transmission rods (303).

4. A prefabricated staircase installation method according to claim 3, characterized in that: The bottom ends of the two limit blocks (302) and the bottom ends of the two clamping blocks (306) on one side close to the fixed rod (301) are fixed with fixed columns (311) that rotate and pass through the two ends of the two transmission rods (304).

5. A prefabricated staircase installation method according to claim 4, characterized in that: One end of the support plate (202) away from the fixed block (201) slides through the stair plate one (1).

6. A prefabricated staircase installation method according to claim 5, characterized in that: Both ends of the stair slab 1 (1) on one side close to the stair slab 2 (4) are fixed with steel bars (10) that pass through the stair slab 2 (4).

7. A prefabricated staircase installation method according to claim 6, characterized in that: The fixing mechanism (2) and the steel bar (10) act as a beam body and support the first stair slab (1) and the second stair slab (4).

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