An auxiliary device for fabricated stair

Abstract

The application relates to the technical field of assembled stairs, and discloses an auxiliary device for assembled stairs, which comprises a first connecting rod, a plurality of first positioning rods vertically installed on the first connecting rod, the first positioning rods being arranged at intervals along the length direction of the first connecting rod, a second connecting rod and a plurality of second positioning rods vertically installed on the second connecting rod, and a positioning block installed on a conversion platform for supporting the upper end of the assembled stairs, when the upper end of the first connecting rod is installed in the positioning block, the lower ends of the first connecting rod and the second connecting rod abut on the conversion platform for supporting the lower end of the assembled stairs; the first positioning rods are located below the assembled stairs and at the included angle between a tread plate and a connecting plate, the second positioning rods are located above the assembled stairs and at the included angle between the tread plate and the connecting plate, and the first positioning rods and the second positioning rods are on the same horizontal plane. The application can make two pairs of half assembled stairs in a flush state.

Description

Technical Field

[0001] This application relates to the technical field of prefabricated stairs, and in particular to an auxiliary device for prefabricated stairs. Background Technology

[0002] Prefabricated buildings are constructed by prefabricating some components in a factory, transporting them to the construction site, and assembling the prefabricated components using reliable connection methods.

[0003] When assembling prefabricated stairs, they need to be hoisted to the designated location for assembly. If the assembled stairs are wide, the overall weight will be relatively heavy. Therefore, manufacturers prefabricate two and a half pairs of stairs first, which are then assembled on-site. After assembly, the joints between the two pairs of stairs are sealed to make them a single unit.

[0004] Regarding the aforementioned technologies, the inventors believe that when assembling two pairs of prefabricated staircases, the alignment is primarily determined by visual inspection. Therefore, the degree of alignment during the assembly of two pairs of prefabricated staircases needs to be improved. Summary of the Invention

[0005] In order to improve the alignment when splicing two pairs of prefabricated stairs, this application provides an auxiliary device for prefabricated stairs.

[0006] This application provides an auxiliary device for prefabricated stairs, which adopts the following technical solution:

[0007] An auxiliary device for a prefabricated staircase is applied to two pairs of half-assembled prefabricated staircases. The prefabricated staircase includes treads and connecting plates connected to the treads. The auxiliary device includes a first connecting rod and multiple first positioning rods vertically installed on the first connecting rod. The first positioning rods are spaced apart along the length of the first connecting rod. The auxiliary device also includes a second connecting rod and multiple second positioning rods vertically installed on the second connecting rod. The second positioning rods are spaced apart along the length of the second connecting rod. It also includes a positioning block, which is installed on a transition platform for supporting the upper end of the prefabricated staircase. The positioning block has two connecting grooves with openings for the upper ends of the first or second connecting rods to enter. The openings of the two connecting grooves face opposite directions. When the upper end of the first connecting rod is installed in the positioning block, the lower end of the first connecting rod abuts against the transition platform supporting the lower end of the prefabricated staircase. When the upper end of the second connecting rod is installed in the positioning block, the lower end of the second connecting rod abuts against the transition platform supporting the lower end of the prefabricated staircase.

[0008] When the first and second connecting rods are installed on the positioning block, the two pairs of half-assembled stairs are located between the first and second connecting rods. The first positioning rod is located below the assembled stairs and at the angle between the tread and the connecting plate. The second positioning rod is located above the assembled stairs and at the angle between the tread and the connecting plate. The first connecting rod has a first insertion hole for the second positioning rod to be inserted into, and the second connecting rod has a second insertion hole for the first positioning rod to be inserted into. When the first positioning rod can be inserted into the first insertion hole, and the second positioning rod can be inserted into the second insertion hole, the first positioning rod and the second positioning rod are on the same horizontal plane.

[0009] By adopting the above technical solution, when installing prefabricated stairs, first place the positioning block on the conversion platform supporting the upper end of the prefabricated stairs, so that the positioning block is close to the upper end of the prefabricated stairs. When installing the positioning block, the opening of the connecting groove on the positioning block for installing the first connecting rod should face downwards. First install half of the prefabricated stairs, then install the upper end of the first connecting rod into the connecting groove of the positioning block, and the lower end of the first connecting rod abuts against the conversion platform supporting the lower end of the prefabricated stairs, so that the first positioning rod is located below the prefabricated stairs and at the angle between the tread and the connecting plate. When installing the other half of the prefabricated stairs, the first positioning rod will not interfere with the prefabricated stairs and can also guide the other half of the prefabricated stairs along the first positioning rod towards the already installed prefabricated stairs. After the two halves of the prefabricated stairs are spliced ​​together, then install the upper end of the second connecting rod into the other connecting groove of the positioning block. Inside the slot, the lower end of the second connecting rod abuts against the conversion platform supporting the lower end of the assembled stairs, so that the second positioning rod is located above the two assembled stairs and at the angle between the tread and the connecting plate. Therefore, the first positioning rod is located below the two assembled stairs, and the second positioning rod is located above the two assembled stairs. The first and second positioning rods can limit the position of the two assembled stairs. When the first positioning rod can be inserted into the first socket and the second positioning rod can be inserted into the second socket, the first and second positioning rods are on the same horizontal plane. At this time, the two assembled stairs are basically aligned and spliced ​​together. It can be determined whether the two assembled stairs have been aligned and spliced ​​together by whether the first and second positioning rods are inserted into the corresponding sockets, without having to judge by visual inspection. Therefore, the alignment degree of the two assembled stairs can be improved.

[0010] Optionally, the first connecting rod is connected to an auxiliary rod via a first positioning rod. The auxiliary rod and the first connecting rod have the same length direction. The auxiliary rod has a through hole for the first positioning rod to be inserted. The positioning block and the conversion platform both have clearance grooves for the auxiliary rod to slide into the connecting groove. When the first connecting rod is installed on the positioning block, the first connecting rod and the auxiliary rod are located in the two connecting grooves respectively.

[0011] By adopting the above technical solution, one end of the first positioning rod is installed on the first connecting rod, and the other end of the first positioning rod is installed on the auxiliary rod. When the first positioning rod is located under the assembled staircase that is half-assembled, it can better maintain a horizontal state. The first positioning rod can be better positioned between the tread and the connecting plate. Since the second positioning rod is located above the assembled staircase, the assembled staircase can support the second positioning rod when the second positioning rod moves closer to the first connecting rod. Because the auxiliary rod enables the first positioning rod to maintain a horizontal state better, when the second connecting rod is installed in the connecting groove, the sliding first connecting rod moves closer to the second connecting rod, and the first positioning rod can also be more accurately inserted into the second connecting rod.

[0012] Optionally, the auxiliary rod has a receiving groove for accommodating the second link and a notch for the second link to slide into the receiving groove.

[0013] By adopting the above technical solution, the second link can be installed inside the auxiliary rod when it approaches the first link, so that the second link and the auxiliary rod can form a whole, which can reduce the accommodation space of the second link and the auxiliary rod.

[0014] Optionally, a sliding part is connected to the second link. The sliding part is semi-circular and coaxial with the second link. The outer diameter of the sliding part is the same as the outer diameter of the auxiliary rod.

[0015] By adopting the above technical solution, since the outer diameter of the sliding part and the outer diameter of the auxiliary rod are the same, the second connecting rod can slide into the auxiliary rod more smoothly through the sliding part.

[0016] Optionally, a first through groove is provided on the second connecting rod, the first through groove extends along the length direction of the second connecting rod, and the first through groove is connected to the second socket.

[0017] By adopting the above technical solution, glue can be filled into the first through groove. The glue can flow into the receiving groove along the first through groove and the second insertion hole, so that the second connecting rod can be fixedly connected with the second positioning rod, and the second connecting rod can also be fixedly connected with the auxiliary rod.

[0018] Optionally, a second through groove is provided on the first connecting rod, the second through groove extends along the length direction of the first connecting rod, and the second through groove communicates with the first insertion hole.

[0019] By adopting the above technical solution, after the second positioning rod is inserted into the first insertion hole, glue is filled into the second through groove to fix the second positioning rod to the first connecting rod.

[0020] Optionally, the positioning block is slidably mounted on the conversion platform, and a fixing block is fixedly connected to the conversion platform. The side wall of the fixing block is provided with a slot for the positioning block to be inserted. When the positioning block is inserted into the slot, the conversion platform closes the opening of the connecting groove where the first connecting rod is installed.

[0021] By adopting the above technical solution, when the first connecting rod is installed in the positioning block, the sliding positioning block, with the position of the first connecting rod unchanged, keeps the downward opening of the connecting groove closed, so that the first connecting rod can only be installed on the positioning block.

[0022] Optionally, the first positioning rod is slidably mounted on the first connecting rod, and the second positioning rod is slidably mounted on the second connecting rod.

[0023] By adopting the above technical solution, the first positioning rod and the second positioning rod can be adjusted according to the size of the assembled staircase, so that the first positioning rod is tangent to the tread and the connecting plate respectively, and the second positioning rod is tangent to the tread and the connecting plate respectively, so that the positional relationship between the first positioning rod and the second positioning rod can limit the two halves of the assembled staircase and keep the two halves of the assembled staircase in an aligned state.

[0024] In summary, this application includes at least one of the following beneficial effects:

[0025] 1. When the first positioning rod is inserted into the second connecting rod and the second positioning rod is inserted into the first positioning rod, it means that the two pairs of half-assembled stairs are in a level state. When the joint of the two pairs of half-assembled stairs is treated, the two pairs of half-assembled stairs are not prone to vertical displacement.

[0026] 2. The first positioning rod slides on the first connecting rod. The distance between two adjacent first positioning rods can be adjusted according to the thickness of the assembled staircase. Therefore, the cooperation between the first positioning rod and the first connecting rod can flexibly accommodate assembled staircases of different thicknesses. The second positioning rod slides on the second connecting rod. The distance between two adjacent second positioning rods can also be adjusted according to the thickness of the assembled staircase. The cooperation between the second positioning rod and the second connecting rod can also flexibly accommodate assembled staircases of different thicknesses. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0028] Figure 2 This is a schematic diagram illustrating the positions of the first positioning rod and the second positioning rod on the assembly stairs according to an embodiment of this application;

[0029] Figure 3 This is a schematic diagram illustrating the second socket in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram illustrating the first socket in an embodiment of this application;

[0031] Figure 5 This is an exploded view illustrating the interaction between the first positioning rod and the prefabricated staircase that is half-installed, according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram illustrating the interconnection between the positioning block and the transition platform clearance slot in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram illustrating the misalignment between the positioning block and the clearance slot of the conversion platform in an embodiment of this application;

[0034] Figure 8 This is a schematic diagram illustrating the installation of the second connecting rod and the auxiliary rod in the connecting groove according to an embodiment of this application;

[0035] Figure 9 This is a schematic diagram illustrating the second connecting rod being installed inside the auxiliary rod in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Assembled staircase; 11. Tread; 12. Connecting plate; 2. First connecting rod; 21. First positioning rod; 22. First insertion hole; 23. Second through groove; 3. Second connecting rod; 31. Second positioning rod; 32. Second insertion hole; 33. Sliding part; 34. First through groove; 4. Positioning block; 41. Connecting groove; 42. Clearance groove; 5. Auxiliary rod; 51. Receiving groove; 6. Conversion platform; 61. Positioning groove; 7. Fixing block; 71. Slot. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0038] This application discloses an auxiliary device for a prefabricated staircase. (Refer to...) Figure 1 and Figure 2 An auxiliary device for a prefabricated staircase is applied to two pairs of prefabricated staircases 1 joined together. The prefabricated staircase 1 includes treads 11 and connecting plates 12 perpendicularly connected to the treads 11. Both the treads 11 and the connecting plates 12 are rectangular structures. The auxiliary device includes a first connecting rod 2 and a second connecting rod 3. Multiple first positioning rods 21 are vertically mounted on the first connecting rod 2, with one end sliding on the first connecting rod 2 and the other end away from the first connecting rod 2. Multiple second positioning rods 31 are vertically mounted on the second connecting rod 3, with one end sliding on the second connecting rod 3 and the other end away from the second connecting rod 3. The auxiliary device also includes a positioning block 4, which is mounted on a conversion platform 6 for supporting the upper end of the prefabricated staircase 1. The positioning block 4 has two connecting grooves 41, each with an opening for the upper ends of the first connecting rod 2 and the second connecting rod 3 to enter. The openings of the two connecting grooves 41 face opposite directions.

[0039] Reference Figure 1 and Figure 2The upper ends of both the first connecting rod 2 and the second connecting rod 3 are mounted on the positioning block 4. The opening of the connecting groove 41 for mounting the first connecting rod 2 in the positioning block 4 faces downward. The upper end of the first connecting rod 2 is mounted in the connecting groove 41 from bottom to top, and the upper end of the second connecting rod 3 is mounted in another connecting groove 41 from top to bottom. The lower ends of the first connecting rod 2 and the second connecting rod 3 abut against the conversion platform 6 supporting the lower end of the staircase 1. The conversion platform 6 has positioning grooves 61 for the insertion of the first connecting rod 2 and the second connecting rod 3.

[0040] The first connecting rod 2 can slide along the length direction of the connecting groove 41, which is perpendicular to the length direction of the first connecting rod 2. When two pairs of half-staircases 1 are installed between two floors, they are located between the first connecting rod 2 and the second connecting rod 3, with the length directions of the first connecting rod 2 and the second connecting rod 3 being the same as the length direction of the staircase 1. The first connecting rod 2 and the second connecting rod 3 have the same shape and size and are on the same horizontal plane. The first positioning rod 21 is located below the staircase 1 and at the angle between the tread 11 and the connecting plate 12, tangent to both the tread 11 and the connecting plate 12. The second positioning rod 31 is located above the staircase 1 and at the angle between the tread 11 and the connecting plate 12, tangent to both the tread 11 and the connecting plate 12. The first positioning rod 21 and the second positioning rod 31 are parallel to each other and on the same horizontal plane.

[0041] Reference Figure 3 and Figure 4 To ensure that the first positioning rod 21 and the second positioning rod 31 can form a whole, the first connecting rod 2 has a first insertion hole 22 for the second positioning rod 31 to be inserted into, and the second connecting rod 3 has a second insertion hole 32 for the first positioning rod 21 to be inserted into. When the first positioning rod 21 is inserted into the first insertion hole 22 and the second positioning rod 31 is inserted into the second insertion hole 32, it can be basically determined that the upper surfaces of the treads 11 and the connecting plate 12 of the two assembled staircases 1 are flush with each other, and the lower surfaces of the treads 11 and the connecting plate 12 of the two assembled staircases 1 are also flush with each other. The two assembled staircases 1 are in an aligned state and form a whole.

[0042] The first positioning rod 21 is slidably installed on the first connecting rod 2, and the second positioning rod 31 is slidably installed on the second connecting rod 3. When installing the first connecting rod 2 and the second connecting rod 3 on-site, the distance between adjacent first positioning rods 21 or adjacent second positioning rods 31 can be adjusted according to the specific dimensions of the prefabricated assembled staircase 1. If the length of the first connecting rod 2 or the second connecting rod 3 is relatively long, a suitable length can also be cut on-site. The first insertion hole 22 on the first connecting rod 2 and the second insertion hole 32 on the second connecting rod 3 can be drilled on-site according to the specific dimensions of the assembled staircase 1.

[0043] Reference Figure 5 When installing the two-part prefabricated staircase 1, after installing one half of the prefabricated staircase 1, the first connecting rod 2 is first installed on the two positioning blocks 4, so that the first positioning rod 21 is located below the prefabricated staircase 1. The first positioning rod 21 can guide the other half of the prefabricated staircase 1 that is about to be installed. In order to better keep the first positioning rod 21 horizontal, the first connecting rod 2 is connected to the first positioning rod 21 with an auxiliary rod 5. The length direction of the auxiliary rod 5 is the same as that of the first connecting rod 2. Both the positioning block 4 and the conversion platform 6 are provided with clearance slots 42 for the auxiliary rod 5 to enter the connecting slot 41. The auxiliary rod 5 and the first connecting rod 2 are respectively located in the two connecting slots 41. When the auxiliary rod 5 and the first connecting rod 2 are both installed in the positioning block 4, the first positioning rod 21 can keep the other half of the prefabricated staircase 1 horizontal and position it, so that the other half of the prefabricated staircase 1 can be accurately installed between the two conversion platforms 6.

[0044] When the second link 3 is installed in the positioning block 4, the second link 3 and the auxiliary rod 5 are located in the same connecting groove 41. In order for the first positioning rod 21 to be inserted into the second link 3, and the second positioning rod 31 to be inserted into the first link 2, the first link 2 and the second link 3 need to be close to each other.

[0045] Reference Figure 6 and Figure 7 When the first connecting rod 2 and the auxiliary rod 5 are fully inserted into the two connecting slots 41, to prevent the first connecting rod 2 from sliding out of the opening of the connecting slot 41, a positioning block 4 is slidably mounted on the conversion platform 6. A fixing block 7 is mounted on the conversion platform 6, and a slot 71 for the positioning block 4 to be inserted is provided on the side wall of the fixing block 7. When the positioning block 4 is slidable, the positions of the first connecting rod 2 and the auxiliary rod 5 remain unchanged. When the positioning block 4 is inserted into the slot 71, the conversion platform 6 closes the opening of the connecting slot 41 where the first connecting rod 2 is installed, and the positioning block 4 and the clearance slot 42 of the conversion platform 6 are misaligned, thereby confining the first connecting rod 2 within the connecting slot 41.

[0046] When the second connecting rod 3 is installed in the connecting groove 41 from top to bottom, the auxiliary rod 5 and the first connecting rod 2 remain stationary, and the second connecting rod 3 is pushed to move towards the auxiliary rod 5 so that the first positioning rod 21 can be inserted into the second connecting rod 3 and the second positioning rod 31 can be inserted into the first connecting rod 2.

[0047] Reference Figure 8 and Figure 9To reduce the space occupied by the second connecting rod 3 and the auxiliary rod 5, the auxiliary rod 5 has a semi-circular cross-section. The auxiliary rod 5 has a receiving groove 51 for accommodating the second connecting rod 3, and a notch for the second connecting rod 3 to slide into the receiving groove 51. To allow the second connecting rod 3 to slide horizontally into the auxiliary rod 5 along the bottom wall of the connecting groove 41, a sliding part 33 is connected to the second connecting rod 3. The sliding part 33 has a semi-circular annular structure. The sliding part 33 is coaxial with the second connecting rod 3, and the outer diameter of the sliding part 33 is the same as the outer diameter of the auxiliary rod 5. When the second connecting rod 3 slides in the connecting groove 41 through the sliding part 33, the second positioning rod 31 slides on the upper surface of the pedal 11, thus allowing the second connecting rod 3 to smoothly approach the auxiliary rod 5.

[0048] Reference Figure 9 The second connecting rod 3 has a first through groove 34 that extends along the length of the second connecting rod 3. The first through groove 34 is connected to the second insertion hole 32. When the second connecting rod 3 is installed in the auxiliary rod 5, glue is filled into the first through groove 34. The glue overflows into the auxiliary rod 5 through the second insertion hole 32, thus fixing the second connecting rod 3 and the first positioning rod 21 together. The second connecting rod 3 can also be fixedly connected to the auxiliary rod 5 at the same time.

[0049] Reference Figure 9 The first connecting rod 2 has a second through groove 23, which extends along the length of the first connecting rod 2 and communicates with the first insertion hole 22. Glue is filled into the second through groove 23, which securely connects the second positioning rod 31 and the first connecting rod 2 together. When the second positioning rod 31 and the first connecting rod 2 are fixedly connected, and the second connecting rod 3 and the first positioning rod 21 are fixedly connected, the two positioning blocks 4 are also connected to the first connecting rod 2 and the second connecting rod 3 to form a single unit.

[0050] The implementation principle of an auxiliary device for a prefabricated staircase according to an embodiment of this application is as follows:

[0051] When installing the two-part prefabricated staircase 1, after installing one half of the prefabricated staircase 1, firstly install the first connecting rod 2 and the auxiliary rod 5 on the two positioning blocks 4, so that the first positioning rod 21 is located below the prefabricated staircase 1. The first positioning rod 21 can guide the other half of the prefabricated staircase 1 that is about to be installed. When the second connecting rod 3 is installed in the positioning block 4, the second connecting rod 3 and the auxiliary rod 5 are located in the same connecting groove 41. Push the second connecting rod 3 to move towards the auxiliary rod 5. When the second connecting rod 3 and the auxiliary rod 5 are coaxial, the first positioning rod 21 can be inserted into the second connecting rod 3, and the second positioning rod 31 can be inserted into the first connecting rod 2. At this time, it is possible to basically determine whether the two prefabricated staircases 1 are aligned without visual inspection. If it is necessary to fix the first connecting rod and the second connecting rod together, then fill the first through groove 34 and the second through groove 23 with glue to fix the first positioning rod 21 and the second positioning rod 31 on the prefabricated staircase 1. The fixing method is simple and quick.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary device for assembled stairs, applied to two pairs of half-spliced assembled stairs (1), characterized in that: The assembled stair (1) comprises a tread (11) and a connecting plate (12) connected with the tread (11), the auxiliary device comprises a first connecting rod (2) and a plurality of first positioning rods (21) vertically installed on the first connecting rod (2), the first positioning rods (21) are arranged along the length direction of the first connecting rod (2), the auxiliary device further comprises a second connecting rod (3) and a plurality of second positioning rods (31) vertically installed on the second connecting rod (3), the second positioning rods (31) are arranged along the length direction of the second connecting rod (3), and the auxiliary device further comprises a positioning block (4) installed on a conversion platform (6) for supporting the upper end of the assembled stair (1), the positioning block (4) is provided with two connecting grooves (41) on the positioning block (4), the connecting grooves (41) have openings for the upper end of the first connecting rod (2) or the second connecting rod (3) to enter, the openings of the two connecting grooves (41) are opposite to each other, when the upper end of the first connecting rod (2) is installed in the positioning block (4), the lower end of the first connecting rod (2) abuts against another conversion platform (6), and when the upper end of the second connecting rod (3) is installed in the positioning block (4), the lower end of the second connecting rod (3) abuts against another conversion platform (6); When the first connecting rod (2) and the second connecting rod (3) are installed on the positioning block (4), two pairs of half assembled stairs (1) are located between the first connecting rod (2) and the second connecting rod (3), the first positioning rods (21) are located below the assembled stair (1) and at the included angle between the tread (11) and the connecting plate (12), the second positioning rods (31) are located above the assembled stair (1) and at the included angle between the tread (11) and the connecting plate (12), the first connecting rod (2) is provided with a first insertion hole (22) for inserting the second positioning rod (31), the second connecting rod (3) is provided with a second insertion hole (32) for inserting the first positioning rod (21), when the first positioning rod (21) can be inserted into the first insertion hole (22) and the second positioning rod (31) can be inserted into the second insertion hole (32), the first positioning rod (21) and the second positioning rod (31) are located on the same horizontal plane; The first connecting rod (2) is connected with an auxiliary rod (5) through the first positioning rod (21), the length directions of the auxiliary rod (5) and the first connecting rod (2) are the same, the auxiliary rod (5) is provided with a through hole for inserting the first positioning rod (21), the positioning block (4) and the conversion platform (6) are both provided with a gap slot (42) for sliding the auxiliary rod (5) into the connecting groove (41), and when the first connecting rod (2) is installed on the positioning block (4), the first connecting rod (2) and the auxiliary rod (5) are located in the two connecting grooves (41) respectively; The auxiliary rod (5) is provided with an accommodating groove (51) for accommodating the second connecting rod (3) and a gap for sliding the second connecting rod (3) into the accommodating groove (51).

2. An assembly aid for a fabricated stair according to claim 1, wherein: The second connecting rod (3) is connected with a sliding part (33), the sliding part (33) is a semicircular ring, the sliding part (33) and the second connecting rod (3) are coaxial, and the outer diameter of the sliding part (33) is the same as the outer diameter of the auxiliary rod (5).

3. An assembly aid for a fabricated stair according to claim 2, wherein: A first through slot (34) is formed in the second connecting rod (3), and the first through slot (34) extends along the length direction of the second connecting rod (3), and the first through slot (34) is communicated with the second insertion hole (32).

4. The assembly aid for a fabricated stair according to claim 1, wherein: A second through slot (23) is formed in the first connecting rod (2), and the second through slot (23) extends along the length direction of the first connecting rod (2), and the second through slot (23) is communicated with the first insertion hole (22).

5. The assembly aid for a pre-fabricated stairway according to claim 1, characterized in that: The positioning block (4) is slidingly installed on the conversion platform (6), and the conversion platform (6) is fixedly connected with a fixed block (7), and the side wall of the fixed block (7) is provided with an insertion slot (71) for inserting the positioning block (4), and when the positioning block (4) is inserted into the insertion slot (71), the conversion platform (6) closes the opening of the connecting slot (41) of the first connecting rod (2).

6. An assembly aid for a fabricated stair according to claim 1, wherein: The first positioning rod (21) is slidingly installed on the first connecting rod (2), and the second positioning rod (31) is slidingly installed on the second connecting rod (3).

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