A pre-fabricated stair installation structure and method

Abstract

The application relates to a prefabricated stair installation structure, which comprises a lower stair platform, an upper stair platform and a stair body, the stair body comprises a first stair and a second stair, one end of the first stair is connected to the lower stair platform, and one end of the second stair is connected to the upper stair platform; the lower stair platform and the upper stair platform are each provided with an anchoring piece; a supporting assembly is arranged between the lower stair platform and the upper stair platform, and the supporting assembly is used for supporting the first stair and the second stair. The prefabricated stair installation structure can improve the installation convenience of the stair body in a narrow stairwell. The application also relates to a prefabricated stair installation method.

Description

Technical Field

[0001] This application relates to the technical field of prefabricated building components, and in particular to a prefabricated staircase installation structure and method. Background Technology

[0002] Staircases are an important component for vertical transportation between floors in buildings. Traditionally, staircases in buildings are mostly made of cast-in-place concrete on the construction site. However, with the increasing maturity and perfection of prefabricated building technology, the application of prefabricated staircases in the building construction process is also increasing. After the staircases are prefabricated in the factory, they are transported to the site for assembly, which greatly reduces the construction period of staircases and will inevitably be widely promoted and applied.

[0003] In the existing technology, during the installation of prefabricated stairs, the prefabricated stairs are lifted by a gantry crane so that both ends of the prefabricated stairs overlap the lower and upper stair platforms of the building stairwell. The two ends of the prefabricated stairs are anchored to the lower and upper stair platforms using pre-embedded bolts. Then, concrete is poured in place at the connection between the prefabricated stairs and the lower stair platform, and at the connection between the prefabricated stairs and the upper stair platform, so that the two ends of the prefabricated stairs are connected to the lower and upper stair platforms respectively.

[0004] However, in construction environments with limited stairwell space, the two ends of such prefabricated stairs need to be connected to the lower and upper stair platforms respectively, and the prefabricated stairs themselves occupy most of the stairwell space. In order to avoid the prefabricated stairs colliding with the side walls of the stairwell when being lifted, the lifting path and angle of the prefabricated stairs need to be constantly adjusted in order to lift the prefabricated stairs to the designated position, causing many inconveniences. Therefore, further improvements are needed. Summary of the Invention

[0005] To improve the ease of installation of prefabricated stairs in narrow stairwells, this application provides a prefabricated staircase installation structure and method.

[0006] Firstly, the prefabricated staircase installation structure provided in this application adopts the following technical solution:

[0007] A prefabricated staircase installation structure includes a lower staircase platform, an upper staircase platform, and a staircase body connecting the lower staircase platform and the upper staircase platform. The staircase body includes a first staircase and a second staircase. One end of the first staircase is connected to the lower staircase platform, and one end of the second staircase is connected to the upper staircase platform, with the other end overlapping the first staircase. Both the lower staircase platform and the upper staircase platform are provided with anchors, and one end of the first staircase and one end of the second staircase are respectively connected to the lower staircase platform or the upper staircase platform through the anchors. A support assembly is provided between the lower staircase platform and the upper staircase platform to support the first staircase and the second staircase.

[0008] By adopting the above technical solution, through the setting of a first staircase and a second staircase, the first staircase is lifted to the lower staircase platform by a gantry crane and connected to one end of the first staircase with anchors. Then, the second staircase is lifted to the upper staircase platform by a gantry crane and connected to one end of the second staircase with anchors. The support components support the first staircase and the second staircase, thereby forming a staircase body with its two ends connected to the lower staircase platform and the upper staircase platform respectively. The staircase body is divided into a first staircase and a second staircase, and the first staircase and the second staircase are installed in sequence, which greatly reduces the space occupation and overall weight of the staircase body when lifting it, thereby improving the ease of installation of the staircase body in a narrow stairwell.

[0009] After the first and second staircases are installed, the support components support the first and second staircases, so that part of the weight between the first and second staircases can be transferred to the lower and upper staircase platforms through the support components, thus ensuring the structural stability of the staircase body after installation.

[0010] Optionally, both the upper surface of the lower stair platform and the upper surface of the upper stair platform are provided with overlapping grooves. The end of the first staircase near the lower stair platform and the end of the second staircase near the upper stair platform are provided with overlapping portions for overlapping with the overlapping grooves. The anchor includes an anchor rod, one end of which is fixed to the bottom wall of the overlapping groove, and the overlapping portion is provided with a fixing hole for the anchor rod to pass through.

[0011] By adopting the above technical solution, with the setting of the overlapping part and the anchor rod, when the overlapping part overlaps the overlapping groove, the anchor rod passes through the through hole of the overlapping part, and the first stair or the second stair can be fixedly connected to the overlapping groove through the anchor rod, so that the lower stair platform and the upper stair platform can be supported on the stair body, and so that most of the weight of the stair body can be applied to the lower stair platform and the upper stair platform.

[0012] Optionally, the support assembly includes a support rod, a first support bar, and a second support bar. One end of the support rod is inserted into the side wall of the stairwell. The first support bar supports the lower surface of the first staircase, with one end connected to the support rod and the other end connected to the lower staircase platform. The second support bar supports the lower surface of the second staircase, with one end connected to the support rod and the other end connected to the upper staircase platform.

[0013] By adopting the above technical solution, through the setting of support rods, first support bars, and second support bars, during the installation of the support assembly, one end of the first support bar is connected to the lower stair platform, and one end of the second support bar is connected to the upper stair platform. Then, the support rod is inserted into the side wall of the stairwell and connected to the first and second support bars respectively. Part of the weight of the first and second staircases can be transferred to the lower and upper stair platforms through the first and second support bars, and the other part of the weight is also transferred to the side wall of the stairwell through the support rods, which greatly improves the structural stability of the first and second staircases after installation.

[0014] Optionally, the first support bar has a first pull groove at the end away from the lower stair platform, and the second support bar has a second pull groove at the end away from the upper stair platform. The support rod is movably inserted through the first pull groove and the second pull groove in sequence. Both the lower stair platform and the upper stair platform are provided with pull members. When the overlapping part overlaps the overlapping groove, the pull members force the first support bar and the second support bar to move away from each other to pull against the support rod.

[0015] By adopting the above technical solution, and through the setting of the tie members, after the overlapping part of the first staircase overlaps with the overlapping groove of the lower staircase platform and the overlapping part of the second staircase overlaps with the overlapping groove of the upper staircase platform, the tie members can force the first support bar and the second support bar to move away from each other. This allows the first support bar to pull the support rod through the side wall of the first tie groove, and the second support bar to pull the support rod through the side wall of the second tie groove, forming a counter-pull state. This keeps the first support bar and the second support bar in a taut state and connected as a whole, improving the deformation resistance of the first support bar and the second support bar, and greatly improving the support effect for the first staircase and the second staircase.

[0016] On the other hand, after the first and second support bars are pulled against the support rod, the outer peripheral wall of the support rod can be firmly pressed against the side walls of the first and second pull grooves, so that the support rod, the first support bar and the second support bar form a whole, improving the stability of the support rod after installation and reducing the possibility of the support rod detaching from the side wall of the stairwell.

[0017] Optionally, the first support bar at the end away from the support rod and the second support bar at the end away from the support rod are each provided with a connecting strip, the connecting strip extending to the corresponding overlapping groove; the pull member includes a sliding plate and a pushing strip, the sliding plate is slidably installed in the overlapping groove, and the connecting strip is located between the sliding plate and the bottom wall of the overlapping groove; the pushing strip is fixed to the plate surface of the sliding plate near the connecting strip, and the side wall of the connecting strip near the pushing strip has a first guide surface; when the overlapping part moves toward the bottom wall of the overlapping groove, the overlapping part pushes the sliding plate toward the side closer to the connecting strip, and causes the pushing strip to push the first guide surface to force the connecting strip to move toward the side away from the support rod.

[0018] By adopting the above technical solution, when the overlapping part of the first staircase overlaps the overlapping groove of the lower staircase platform through the setting of the sliding plate and the push bar, the overlapping part of the first staircase can push the sliding plate to move towards the side closer to the connecting bar. When the sliding plate moves to force the push bar to abut against the first guide surface of the connecting bar, the push bar can move the connecting bar away from the first support bar through the first guide surface, thereby driving the first support bar to move and making the first pair of pull grooves of the first support bar tighten to the support rod.

[0019] After the first staircase is installed, the overlapping part of the second staircase is connected to the overlapping groove of the upper staircase platform. The overlapping part of the second staircase can push the connecting strip of the second support bar through the sliding plate and pushing block of the upper staircase platform, thereby driving the second support bar to move and tightening the second tie groove of the second support bar to the support rod. Thus, after the first support bar and the second support bar are installed, they form a tie, which greatly improves the tension between the first support bar and the second support bar, thereby improving the deformation resistance of the first support bar and the second support bar.

[0020] Optionally, an anti-detachment component is provided between the connecting strip and the sliding plate. When the first support strip and the second support strip are pulled against the support rod, the anti-detachment component causes the connecting strip to engage with the sliding plate.

[0021] By adopting the above technical solution, and by setting the anti-detachment component, after the first support bar and the second support bar form a counter-pull, the anti-detachment component makes the connecting bar snap into the sliding plate, thereby fixing the relative position of the first support bar and the second support bar, and keeping the first support bar and the second support bar in a counter-pull state.

[0022] Optionally, the connecting strip has a first limiting groove on its side wall near the sliding plate, and the sliding plate has a second limiting groove on its side wall near the connecting strip. When the first support strip and the second support strip are pulled against the support rod, the first limiting groove is aligned with the second limiting groove. The anti-detachment component includes an anti-detachment piece and a return spring. One end of the anti-detachment piece is connected to the side wall of the first limiting groove, and the return spring is connected between the anti-detachment piece and the side wall of the connecting strip. The return spring normally causes the free end of the anti-detachment piece to be locked against the inner wall of the second limiting groove.

[0023] By adopting the above technical solution, and by setting the anti-detachment plate and the return spring, when the connecting bar moves away from the support rod to form a pull between the first support bar and the second support bar, the first limiting groove can move to a state opposite to the second limiting groove. Under the action of the return spring, the anti-detachment plate is engaged with the inner wall of the second limiting groove to reduce the possibility of the connecting bar retraction.

[0024] Optionally, multiple reinforcing strips are fixed to both the first support strip near the side wall of the first staircase and the second support strip near the side wall of the second staircase. The first pair of pull grooves are disposed on the reinforcing strips of the first support strip, and the second pair of pull grooves are disposed on the reinforcing strips of the second support strip.

[0025] By adopting the above technical solution and setting the reinforcing strip, the reinforcing strip can improve the structural rigidity of the first or second support strip, reduce the possibility of the first or second support strip deforming under the weight of the staircase body, and improve the stability of the overall structure.

[0026] Optionally, both the lower surface of the first staircase and the lower surface of the second staircase are provided with embedding grooves. When the overlapping part overlaps the overlapping groove, the first support strip is embedded in the embedding groove of the first staircase, and the second support strip is embedded in the embedding groove of the second staircase.

[0027] By adopting the above technical solution, through the setting of the embedding groove, the first support strip is embedded in the embedding groove of the first staircase to support the first staircase, and the second support strip is embedded in the embedding groove of the second staircase to support the second staircase. The embedding groove allows the first and second support strips to be hidden in the embedding groove, improving the flatness of the lower surface of the first staircase and the lower surface of the second staircase, thereby improving the aesthetics of the overall structure. On the other hand, the first or second support strip can limit the side wall of the embedding groove, reducing the possibility of the first or second staircase moving along its own width direction, thereby improving the structural stability of the staircase body after installation.

[0028] Secondly, the installation method for a prefabricated staircase provided in this application adopts the following technical solution:

[0029] An installation method for a prefabricated staircase includes the following steps: S1, creating overlapping grooves: creating overlapping grooves on the surfaces of the lower staircase platform and the upper staircase platform respectively; S2, installing anchor rods: fixing the anchor rods to the bottom wall of the overlapping grooves; S3, installing support components: connecting one end of the first support strip to the lower staircase platform and one end of the second support strip to the upper staircase platform respectively, and connecting the support rods to the first and second support strips and inserting them into the side wall of the staircase; S4, installing tie rods: sliding the sliding plate into the overlapping grooves; S5, installing the staircase body: sequentially installing one end of the first staircase to the first staircase platform and one end of the second staircase to the second staircase platform; S6, pouring concrete: pouring concrete into the overlapping grooves of the lower staircase platform to form a whole with the lower staircase platform, the first staircase, and the first support strip; pouring concrete into the overlapping grooves of the upper staircase platform to form a whole with the upper staircase platform, the second staircase, and the second support strip.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By setting up a first staircase and a second staircase, the first staircase is lifted to the lower staircase platform by a gantry crane and connected to one end of the first staircase with anchors. Then, the second staircase is lifted to the upper staircase platform by a gantry crane and connected to one end of the second staircase with anchors. Support components support the first staircase and the second staircase, thus forming a staircase body with its two ends connected to the lower staircase platform and the upper staircase platform respectively. The staircase body is divided into a first staircase and a second staircase, and the first staircase and the second staircase are installed in sequence, which greatly reduces the space occupation and overall weight of the staircase body when lifting it, thereby improving the ease of installation of the staircase body in a narrow stairwell.

[0032] 2. By setting up the tie members, after the overlapping part of the first staircase overlaps with the overlapping groove of the lower staircase platform and the overlapping part of the second staircase overlaps with the overlapping groove of the upper staircase platform, the tie members can force the first support bar and the second support bar to move away from each other. This allows the first support bar to pull the support rod through the side wall of the first tie groove, and the second support bar to pull the support rod through the side wall of the second tie groove, forming a tension state. This keeps the first support bar and the second support bar in a taut state and connected as a whole, improving the deformation resistance of the first support bar and the second support bar, and greatly improving the support effect for the first staircase and the second staircase.

[0033] 3. By setting up the anti-detachment plate and the return spring, when the connecting bar moves away from the support rod to form a counter-pull between the first support bar and the second support bar, the first limiting groove can move to a state opposite to the second limiting groove. Under the action of the return spring, the anti-detachment plate is engaged with the inner wall of the second limiting groove to reduce the possibility of the connecting bar retraction. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0035] Figure 2 This is a structural diagram illustrating the supporting components;

[0036] Figure 3 It is a partial sectional view showing the overlapping part of the second staircase after it overlaps the overlapping groove;

[0037] Figure 4 It is a partial sectional view showing the overlapping part of the first staircase after it overlaps the overlapping groove;

[0038] Figure 5 This is a structural schematic diagram illustrating the through-slot;

[0039] Figure 6 This is a structural diagram illustrating the first pair of grooves and the second pair of grooves;

[0040] Figure 7 This is an exploded view of the sliding components of the stair landing;

[0041] Figure 8 This is an exploded view of the sliding components of the stair platform;

[0042] Figure 9 yes Figure 3 Enlarged view of point A in the middle.

[0043] Explanation of reference numerals in the attached drawings: 1. Descending stair platform; 11. Overlap groove; 12. Anchor rod; 2. Upward stair platform; 3. Staircase body; 31. First staircase; 311. Clearance groove; 32. Second staircase; 33. Overlap part; 331. Fixing hole; 34. Embedding groove; 4. Support assembly; 41. Support rod; 42. First support bar; 421. First tie rod groove; 43. Second support bar; 431. Second tie rod groove; 44. Connection 441. First guide surface; 442. First limiting groove; 443. Through groove; 45. Reinforcing strip; 451. First tie part; 452. Second tie part; 46. Abutting part; 5. Tie member; 51. Sliding plate; 511. Second limiting groove; 512. Sliding groove; 52. Pushing strip; 521. Second guide surface; 6. Anti-detachment component; 61. Anti-detachment piece; 62. Return spring; 7. First concrete layer; 8. Stairwell. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0045] This application discloses a prefabricated staircase installation structure.

[0046] Reference Figure 1 , Figure 2 A prefabricated staircase installation structure includes a lower staircase platform 1, an upper staircase platform 2, and a staircase body 3. The lower staircase platform 1 and the upper staircase platform 2 are used for fixed installation on the side wall of the stairwell 8 of the building. In this embodiment, the staircase body 3 is a prefabricated component and is used to connect the lower staircase platform 1 and the upper staircase platform 2.

[0047] Reference Figure 1 , Figure 2 Specifically, the staircase body 3 includes a first staircase 31 and a second staircase 32. The lower end of the first staircase 31 is used to connect to the lower staircase platform 1, the upper end of the second staircase 32 is used to connect to the upper staircase platform 2, and the lower end of the second staircase 32 is used to abut against the upper end of the first staircase 31. The first staircase 31 and the second staircase 32 are combined to form the staircase body 3.

[0048] Reference Figure 1 , Figure 2 The upper surface edge of the lower stair platform 1 and the upper surface edge of the upper stair platform 2 are both provided with overlapping grooves 11. The lower end of the first stair 31 and the upper end of the second stair 32 are both integrally formed with overlapping parts 33. The overlapping parts 33 are used to overlap the corresponding overlapping grooves 11 so that the bottom wall of the overlapping groove 11 of the lower stair platform 1 supports the first stair 31 and the bottom wall of the overlapping groove 11 of the upper stair platform 2 supports the second stair 32. Anchors are installed in the overlapping grooves 11 of the lower stair platform 1 and the overlapping grooves 11 of the upper stair platform 2. The anchors are used to connect the overlapping parts 33 of the first stair 31 or the overlapping parts 33 of the second stair 32. The overlapping parts 33 of the first stair 31 and the overlapping parts 33 of the second stair 32 are respectively fixedly installed in the corresponding overlapping grooves 11 by anchors.

[0049] Reference Figure 1 , Figure 2The upper surface of the overlapping part 33 is provided with multiple fixing holes 331. All fixing holes 331 are spaced apart along the width direction of the first stair 31 or the width direction of the second stair 32. Each fixing hole 331 is a through hole that penetrates the two opposite side walls of the overlapping part 33. In this embodiment, the anchor is set as an anchor rod 12. Multiple anchor rods 12 are provided. All anchor rods 12 are set one-to-one with all fixing holes 331. The anchor rods 12 are set vertically. One end of the anchor rod 12 is fixedly inserted into the bottom wall of the overlapping groove 11. When the overlapping part 33 overlaps the overlapping groove 11, each anchor rod 12 passes through the corresponding fixing hole 331. The overlapping part 33 of the first stair 31 and the overlapping part 33 of the second stair 32 are both fixedly connected to the corresponding overlapping groove 11 by multiple anchor rods 12.

[0050] Reference Figure 1 , Figure 3 Specifically, a threaded hole (not shown in the figure) is made in the bottom wall of the overlap groove 11, and one end of the anchor rod 12 is inserted into the threaded hole and threadedly connected to the threaded hole. It should be noted that when the overlap part 33 overlaps the overlap groove 11 and the anchor rod 12 passes through the fixing hole 331, there is a first gap between the overlap part 33 and the overlap groove 11, and a second gap between the end face of the anchor rod 12 away from the bottom wall of the overlap groove 11 and the upper surface of the overlap part 33. The first gap and the second gap are used for subsequent concrete pouring and forming The first concrete layer 7 forms the second gap, which allows the anchor rod 12 to be hidden in the fixing hole 331, improving the flatness of the overall structure. In other embodiments, in order to improve the connection between the overlapping part 33 and the anchor rod 12, the fixing hole 331 can be set as a countersunk hole. After the anchor rod 12 passes through the fixing hole 331, the nut is threaded to the outer peripheral wall of the anchor rod 12, so that the nut can be locked in the overlapping part 33, thereby improving the connection strength between the overlapping part 33 and the anchor rod 12.

[0051] Reference Figure 3 , Figure 4 The lower surface of the first staircase 31 and the lower surface of the second staircase 32 are provided with a groove 34. Multiple grooves 34 are provided and are spaced apart along the width direction of the first staircase 31 or the width direction of the second staircase 32. The two ends of each groove 34 pass through the two sides of the length direction of the first staircase 31 or the two sides of the length direction of the second staircase 32 respectively. All grooves 34 are provided in a one-to-one correspondence with all anchor rods 12.

[0052] Reference Figure 2 , Figure 4A support component 4 is installed between the lower stair platform 1 and the upper stair platform 2. The support component 4 is used to support the first stair 31 and the second stair 32. In this embodiment, multiple support components 4 are provided and are spaced apart along the width direction of the first stair 31 or the width direction of the second stair 32. All support components 4 are provided in a one-to-one correspondence with all the embedded slots 34.

[0053] Reference Figure 1 , Figure 2 The support assembly 4 includes a support rod 41, a first support bar 42, and a second support bar 43. The support rod 41 is made of steel, and both ends of the support rod 41 extend along the width direction of the first staircase 31. A clearance groove 311 is provided at the end of the first staircase 31 near the second staircase 32. The two ends of the clearance groove 311 pass through both sides of the width direction of the first staircase 31. The support rod 41 is located in the clearance groove 311, and one end of the support rod 41 is used to insert into the side wall of the stairwell 8. Specifically, a positioning groove (not shown in the figure) is drilled in the side wall of the stairwell 8 for one end of the support rod 41 to be inserted.

[0054] Reference Figure 2 , Figure 4 One end of the first support bar 42 is connected to the support rod 41, and the other end is connected to the anchor rod 12 corresponding to the lower stair platform 1. When the overlapping part 33 of the first stair 31 overlaps with the overlapping groove 11 of the lower stair platform 1, the first support bar 42 is embedded in the embedding groove 34 of the first stair 31 to support the bottom wall of the embedding groove 34 of the first stair 31.

[0055] Reference Figure 2 , Figure 3 One end of the second support bar 43 is connected to the support rod 41, and the other end is connected to the anchor rod 12 corresponding to the upper stair platform 2. When the overlapping part 33 of the second stair 32 overlaps with the overlapping groove 11 of the upper stair platform 2, the second support bar 43 is embedded in the embedding groove 34 of the second stair 32 to support the bottom wall of the embedding groove 34 of the second stair 32.

[0056] One end of the first support bar 42 is connected to the lower stair platform 1, and one end of the second support bar 43 is connected to the upper stair platform 2. The first support bar 42 and the second support bar 43 are connected to each other through the support rod 41, thereby supporting the first stair 31 and the second stair 32 and improving the structural stability of the first stair 31 and the second stair 32 after installation. It should be noted that after the first stair 31 and the second stair 32 are installed, concrete needs to be poured into the clearance groove 311 and all the embedded grooves 34 to form a second concrete layer (not shown in the figure) to hide the support rod 41, the first support bar 42 and the second support bar 43 and improve the flatness of the lower surface of the stair body 3.

[0057] Reference Figure 3 , Figure 4 , Figure 5 A connecting strip 44 is fixedly installed at the end of the first support strip 42 away from the support rod 41 and at the end of the second support strip 43 away from the support rod 41. In this embodiment, one end of the connecting strip 44 extends into the corresponding overlapping groove 11 and the connecting strip 44 is arranged parallel to the bottom wall of the overlapping groove 11. A through groove 443 is opened on the side wall of the connecting strip 44 near the bottom wall of the overlapping groove 11. The through groove 443 is a through groove that passes through the two opposite side walls of the connecting strip 44. The anchor rod 12 passes through the through groove 443, and the connecting strip 44 is sleeved on the corresponding anchor rod 12 through the through groove 443. The end of the first support strip 42 near the lower stair platform 1 and the end of the second support strip 43 near the upper stair platform 2 are both sleeved on the anchor rod 12 of the corresponding overlapping groove 11 through the through groove 443 of the connecting strip 44.

[0058] Reference Figure 5 , Figure 6 Multiple reinforcing bars 45 are fixedly installed on the side wall of the first support bar 42 near the first stair 31 and the side wall of the second support bar 43 near the second stair 32. All reinforcing bars 45 are spaced apart along the width direction of the first support bar 42 or the width direction of the second support bar 43. In this embodiment, a first pull part 451 protrudes from the side of the reinforcing bar 45 of the first support bar 42 near the support rod 41. The first pull part 451 has a first pull groove 421 that penetrates the first pull part 451.

[0059] The reinforcing strip 45 of the second support bar 43 protrudes from the side near the support rod 41 and is provided with a second pull part 452. The second pull part 452 is provided with a second pull groove 431 that penetrates the second pull part 452. The support rod 41 passes through the first pull groove 421 and the second pull groove 431 in sequence. The end of the first support bar 42 away from the lower stair platform 1 is sleeved on the outer peripheral wall of the support rod 41 through the first pull groove 421 of the first pull part 451. The end of the second support bar 43 away from the upper stair platform 2 is sleeved on the outer peripheral wall of the support rod 41 through the second pull groove 431 of the second pull part 452.

[0060] This design connects the two ends of the first support bar 42 to the support rod 41 and the anchor rod 12 corresponding to the lower stair platform 1, respectively, and connects the two ends of the second support bar 43 to the support rod 41 and the anchor rod 12 corresponding to the upper stair platform 2, respectively.

[0061] Reference Figure 5 , Figure 6The first support bar 42 and the corresponding reinforcing bar 45, as well as the second support bar 43 and the corresponding reinforcing bar 45, are all integrally formed. The first support bar 42, the second support bar 43, the reinforcing bar 45, and the connecting bar 44 are all made of steel. With this design, the first support bar 42 and the corresponding reinforcing bar 45, as well as the second support bar 43 and the corresponding reinforcing bar 45, combine to form a channel steel structure, which greatly improves the structural rigidity of the first support bar 42 and the second support bar 43, thereby improving the support effect on the first staircase 31 and the second staircase 32.

[0062] Reference Figure 2 , Figure 5 , Figure 6 In this embodiment, the through groove 443, the first tie groove 421 and the second tie groove 431 are all set as strip grooves; tie members 5 are installed in the overlapping groove 11 of the lower stair platform 1 and the overlapping groove 11 of the upper stair platform 2. When the overlapping part 33 overlaps the overlapping groove 11, the tie member 5 forces the first support bar 42 and the second support bar 43 to move away from each other to pull against the support rod 41.

[0063] This design forces the first support bar 42 and the second support bar 43 to pull against the support rod 41 through the tie bar 5, keeping the first support bar 42 and the second support bar 43 in a taut state, improving the deformation resistance of the first support bar 42 and the second support bar 43, and thus improving the support effect on the stair body 3; on the other hand, the first support bar 42 and the second support bar 43 pull against the support rod 41 to fix the support rod 41, thereby reducing the possibility that one end of the support rod 41 will detach from the side wall of the stairwell 8.

[0064] Reference Figure 3 , Figure 7 The tie member 5 includes a sliding plate 51 and a push bar 52. The surface of the sliding plate 51 is parallel to the bottom wall of the overlap groove 11. The sliding plate 51 is located between the overlap part 33 and the connecting bar 44. The surface of the sliding plate 51 is provided with multiple sliding grooves 512. All sliding grooves 512 are provided in a one-to-one correspondence with all anchor rods 12. Each anchor rod 12 is slidably inserted into the corresponding sliding groove 512. The sliding plate 51 is slidably installed on the anchor rod 12 through the multiple sliding grooves 512 and can slide along the length direction of the anchor rod 12.

[0065] Reference Figure 3 , Figure 8In this embodiment, the end of the reinforcing strip 45 away from the support rod 41 extends to the upper surface of the connecting strip 44 and forms an abutment portion 46. The side wall of the abutment portion 46 away from the connecting strip 44 has a first guide surface 441. The pushing strip 52 is fixedly installed on the sliding plate 51 near the connecting strip 44. The side wall of the pushing strip 52 near the abutment portion 46 has a second guide surface 521. When the overlapping portion 33 moves toward the bottom wall of the overlapping groove 11, the overlapping portion 33 pushes the sliding plate 51 toward the side closer to the connecting strip 44, and causes the second guide surface 521 of the pushing strip 52 to push the first guide surface 441. The surface 441 forces the connecting strip 44 to move away from the support rod 41. With this design, after the first stair 31 is placed in the overlapping groove 11 of the lower stair platform 1 and the second stair 32 is placed in the overlapping groove 11 of the upper stair platform 2, the overlapping part 33 of the first stair 31 and the overlapping part 33 of the second stair 32 can push their respective sliding plates 51 and force the pushing strip 52 to push the connecting strip 44, so as to drive the first support strip 42 and the second support strip 43 away from each other, and pull against the support rod 41 through the side wall of the first pair of pull grooves 421 and the side wall of the second pair of pull grooves 431.

[0066] Reference Figure 8 , Figure 9 The abutment portion 46 has a first limiting groove 442 on its side wall near the sliding plate 51, and the sliding plate 51 has a second limiting groove 511 on its side wall near the abutment portion 46. When the first support bar 42 and the second support bar 43 are pulled against the support rod 41, the first limiting groove 442 is directly opposite the second limiting groove 511. An anti-detachment component 6 is installed between the first limiting groove 442 and the second limiting groove 511. When the sliding plate 51 abuts against the abutment portion 46 and forces the first support bar 42 and the second support bar 43 to be pulled against the support rod 41, the anti-detachment component 6 causes the connecting bar 44 to be engaged with the sliding plate 51.

[0067] Reference Figure 8 , Figure 9 The anti-detachment component 6 includes an anti-detachment piece 61 and a return spring 62. One end of the anti-detachment piece 61 is connected to the side wall of the first limiting groove 442. The anti-detachment piece 61 is made of iron. One end of the anti-detachment piece 61 is fixed to the side wall of the first limiting groove 442 by welding, and the other end is folded upward out of the first limiting groove 442. One end of the return spring 62 is fixedly connected to the side wall of the anti-detachment piece 61 near the connecting strip 44, and the other end is fixedly connected to the surface of the connecting strip 44. The return spring 62 is normally... The free end of the anti-detachment piece 61 is kept folded out of the first limiting groove 442 so that the anti-detachment piece 61 can be locked in the inner wall of the second limiting groove 511. With this design, after the overlapping part 33 overlaps with the overlapping groove 11, the overlapping part 33 pushes the connecting strip 44 to move and forces the first limiting groove 442 to move to a state opposite to the second limiting groove 511. Under the action of the return spring 62, the anti-detachment piece 61 is locked in the second limiting groove 511, reducing the possibility of the connecting strip 44 retracting.

[0068] The implementation principle of a prefabricated staircase installation structure in this application embodiment is as follows: the staircase body 3 is divided into a first staircase 31 and a second staircase 32. The first staircase 31 is installed on the lower staircase platform 1 and the second staircase 32 is installed on the upper staircase platform 2 in sequence, thereby reducing the space occupancy rate of the staircase body 3 during installation and the overall weight during hoisting, so that the staircase body 3 can be adapted to installation in a narrow stairwell 8.

[0069] After the first staircase 31 and the second staircase 32 are installed, the first support bar 42 and the second support bar 43 move away from each other under the action of the overlapping part 33 of the first staircase 31 and the overlapping part 33 of the second staircase 32, respectively. This causes the first support bar 42 and the second support bar 43 to pull against the support rod 41, thereby making the first support bar 42, the second support bar 43 and the support rod 41 taut together and form a whole, which greatly improves the support effect on the staircase body 3. Most of the weight of the staircase body 3 is transferred to the lower staircase platform 1 and the upper staircase platform 2 through the overlapping part 33 of the first staircase 31 and the overlapping part 33 of the second staircase 32, respectively. A part of the weight is transferred to the lower staircase platform 1 and the upper staircase platform 2 through the first support bar 42 and the second support bar 43, respectively. Another part of the weight can be transferred to the side wall of the stairwell 8 through the support rod 41, thereby improving the structural strength of the staircase body 3 after it is built.

[0070] This application also discloses a method for installing a prefabricated staircase.

[0071] An installation method for prefabricated stairs, specifically including the following steps:

[0072] S1. Creation of the overlapping groove 11: The overlapping groove 11 is formed by chiseling on the surface of the lower stair platform 1 and the surface of the upper stair platform 2 respectively.

[0073] S2. Installation of anchor rods 12: According to the size of the fixing hole 331 of the overlapping part 33, multiple threaded grooves are opened on the bottom wall of the overlapping groove 11, and multiple anchor rods 12 are inserted into the threaded grooves one by one.

[0074] S3, Installation of support component 4:

[0075] a. The connecting strips 44 of the multiple first support strips 42 are respectively fitted onto the anchor rods 12 corresponding to the lower stair platform 1;

[0076] b. The connecting strips 44 of the multiple second support strips 43 are respectively fitted onto the anchor rods 12 corresponding to the upper stair platform 2;

[0077] c. A positioning groove is opened on the side wall of the building stairwell 8, and the support rod 41 is respectively passed through the first pair of pull grooves 421 and the second pair of pull grooves 431 and inserted into the positioning groove.

[0078] S4. Installation of tie rod 5: Align the sliding groove 512 of the sliding plate 51 with the anchor rod 12 and fit it onto the anchor rod 12, so that the sliding plate 51 normally abuts against the upper surface of the abutment part 46.

[0079] S5. Installation of the staircase body 3:

[0080] a. The first staircase 31 is lifted to the site by a gantry crane, so that the overlapping part 33 of the first staircase 31 overlaps with the overlapping groove 11 of the lower staircase platform 1;

[0081] b. The second staircase 32 is hoisted to the site by a gantry crane, so that the overlapping part 33 of the second staircase 32 overlaps with the overlapping groove 11 of the upper staircase platform 2, and the end of the second staircase 32 closer to the first staircase 31 overlaps with the upper surface of the end of the first staircase 31 away from the lower staircase platform 1.

[0082] S6. Concrete pouring:

[0083] a. Install baffles on the side wall of the lower stair platform 1 near the upper stair platform 2 and on the side wall of the upper stair platform 2 near the lower stair platform 1, so that the overlap groove 11 forms a space for pouring concrete.

[0084] b. Pour concrete into the overlap groove 11 and the fixing hole 331 respectively. After the concrete solidifies, the first concrete layer 7 is formed.

[0085] c. Install baffles on the lower surface of the first staircase 31 and the lower surface of the second staircase 32 so that the clearance groove 311 and the embedding groove 34 form a space for pouring concrete.

[0086] d. Pour concrete into the clearance groove 311 and the embedding groove 34 respectively. After the concrete solidifies, a second concrete layer is formed.

[0087] The implementation principle of the installation method of a prefabricated staircase in this application embodiment is as follows: the first concrete layer 7 can improve the flatness of the connection between the first staircase 31 and the lower staircase platform 1, and between the second staircase 32 and the upper staircase platform 2; the second concrete layer can improve the flatness of the lower surface of the first staircase 31 and the lower surface of the second staircase 32, and hide the first support strip 42, the second support strip 43 and the support rod 41 in the second concrete layer, thereby improving the aesthetics of the overall structure.

[0088] The first concrete layer 7 and the second concrete layer enable the first staircase 31, the second staircase 32, the platform of the first staircase 31, the platform of the second staircase 32, the first support bar 42, the second support bar 43 and the support rod 41 to form an integral whole, thereby improving the structural stability of the staircase body 3 after installation.

[0089] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A prefabricated staircase installation structure, comprising a lower staircase platform (1), an upper staircase platform (2), and a staircase body (3) connecting the lower staircase platform (1) and the upper staircase platform (2), characterized in that: The staircase body (3) includes a first staircase (31) and a second staircase (32). One end of the first staircase (31) is connected to the lower staircase platform (1), and one end of the second staircase (32) is connected to the upper staircase platform (2), with the other end overlapping the first staircase (31). Both the lower staircase platform (1) and the upper staircase platform (2) are provided with anchors. One end of the first staircase (31) and one end of the second staircase (32) are respectively connected to the lower staircase platform (1) or the upper staircase platform (2) through the anchors. A support assembly (4) is provided between the lower staircase platform (1) and the upper staircase platform (2). The support assembly (4) is used to support the first staircase (31) and the second staircase (32); the upper surface of the lower staircase platform (1) and the upper surface of the upper staircase platform (2) are both provided with overlapping grooves (11), and the end of the first staircase (31) near the lower staircase platform (1) and the end of the second staircase (32) near the upper staircase platform (2) are both provided with overlapping portions (33) for overlapping with the overlapping grooves (11); the anchor includes an anchor rod (12), one end of the anchor rod (12) is fixed to the bottom wall of the overlapping groove (11), and the overlapping portion (33) is provided with a fixing hole for the anchor rod (12) to pass through. (331); The support assembly (4) includes a support rod (41), a first support bar (42), and a second support bar (43). One end of the support rod (41) is inserted into the side wall of the stairwell (8). The first support bar (42) is supported on the lower surface of the first staircase (31). One end of the first support bar (42) is connected to the support rod (41), and the other end is connected to the lower stair platform (1). The second support bar (43) is supported on the lower surface of the second staircase (32). One end of the second support bar (43) is connected to the support rod (41), and the other end is connected to the upper stair platform (2). The support bar (42) has a first pull groove (421) at the end away from the lower stair platform (1), and the second support bar (43) has a second pull groove (431) at the end away from the upper stair platform (2). The support rod (41) is sequentially movably inserted through the first pull groove (421) and the second pull groove (431). Both the lower stair platform (1) and the upper stair platform (2) are provided with pull members (5). When the overlapping part (33) overlaps with the overlapping groove (11), the pull member (5) forces the first support bar (42) and the second support bar (43) to move away from each other to pull against the support rod (41).

2. The prefabricated staircase installation structure according to claim 1, characterized in that: The first support bar (42) has a connecting bar (44) at one end away from the support rod (41), and the second support bar (43) has a connecting bar (44) at one end away from the support rod (41). The connecting bar (44) extends to the corresponding overlapping groove (11). The pull member (5) includes a sliding plate (51) and a push bar (52). The sliding plate (51) is slidably installed in the overlapping groove (11), and the connecting bar (44) is located between the sliding plate (51) and the bottom wall of the overlapping groove (11). The push bar (52) The sliding plate (51) is fixed to the plate surface near the connecting strip (44), and the connecting strip (44) has a first guide surface (441) near the side wall of the push strip (52); when the overlapping part (33) moves toward the bottom wall of the overlapping groove (11), the overlapping part (33) pushes the sliding plate (51) toward the side near the connecting strip (44), and causes the push strip (52) to push the first guide surface (441) to force the connecting strip (44) to move away from the support rod (41).

3. The prefabricated staircase installation structure according to claim 2, characterized in that: An anti-detachment component (6) is provided between the connecting strip (44) and the sliding plate (51). When the first support strip (42) and the second support strip (43) are pulled against the support rod (41), the anti-detachment component (6) drives the connecting strip (44) to engage with the sliding plate (51).

4. The prefabricated staircase installation structure according to claim 3, characterized in that: The connecting strip (44) has a first limiting groove (442) on the side wall near the sliding plate (51), and the sliding plate (51) has a second limiting groove (511) on the side wall near the connecting strip (44). When the first support strip (42) and the second support strip (43) are pulled against the support rod (41), the first limiting groove (442) is directly opposite the second limiting groove (511). The anti-detachment component (6) includes an anti-detachment piece (61) and a return spring (62). One end of the anti-detachment piece (61) is connected to the side wall of the first limiting groove (442), and the return spring (62) is connected between the anti-detachment piece (61) and the side wall of the connecting strip (44). The return spring (62) normally causes the free end of the anti-detachment piece (61) to be locked in the inner wall of the second limiting groove (511).

5. The prefabricated staircase installation structure according to claim 1, characterized in that: The first support bar (42) near the side wall of the first staircase (31) and the second support bar (43) near the side wall of the second staircase (32) are both fixed with multiple reinforcing bars (45). The first pair of pull grooves (421) are provided on the reinforcing bars (45) of the first support bar (42), and the second pair of pull grooves (431) are provided on the reinforcing bars (45) of the second support bar (43).

6. The prefabricated staircase installation structure according to claim 1, characterized in that: The lower surface of the first staircase (31) and the lower surface of the second staircase (32) are provided with a groove (34). When the overlapping part (33) overlaps the overlapping groove (11), the first support bar (42) is embedded in the groove (34) of the first staircase (31), and the second support bar (43) is embedded in the groove (34) of the second staircase (32).

7. A method for installing a prefabricated staircase, based on a prefabricated staircase installation structure according to any one of claims 1-6, comprising the following steps: S1. Opening of the overlap groove (11): The overlap groove (11) is chiseled on the surface of the lower stair platform (1) and the surface of the upper stair platform (2); S2. Installation of anchor rod (12): The anchor rod (12) is fixedly installed on the bottom wall of the lap groove (11); S3. Installation of support components (4): Connect one end of the first support bar (42) to the lower stair platform (1), connect one end of the second support bar (43) to the upper stair platform (2), and connect the support rod (41) to the first support bar (42) and the second support bar (43) and insert it into the side wall of the stairwell (8). S4. Installation of the tie rod (5): The tie rod (5) is slidably installed in the overlapping groove (11); S5. Installation of the staircase body (3): Install one end of the first staircase (31) onto the platform of the first staircase (31) in sequence, and install one end of the second staircase (32) onto the platform of the second staircase (32); S6. Concrete pouring: Concrete is poured into the overlapping groove (11) of the lower stair platform (1) to form a whole with the lower stair platform (1), the first stair (31) and the first support strip (42); Concrete is poured into the overlapping groove (11) of the upper stair platform (2) to form a whole with the upper stair platform (2), the second stair (32) and the second support strip (43).

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