A reinforced concrete staircase structure and construction method thereof

Abstract

The present invention provides a reinforced concrete staircase structure and a construction method thereof, which relate to the field of building stairs, and include: a fixing part; an adjusting part arranged above the fixing part; a positioning part arranged above the adjusting part; and a laying part arranged at the side of the positioning part, and the relative position of the flip block can be adjusted by rotating the flip block, so that after the flip block angle is adjusted, the flip block can be plugged in to maintain stability, so that it is convenient to use, and the laying of the laying board can be conveniently performed by splicing the docking rod with the flip block, so that the staircase structure can be shaped in cooperation with the tightening plate, so that the staircase can be laid, and the problem that the current concrete staircase structure needs to be fixedly connected by manpower before laying, so as to facilitate the shaping of the staircase structure, which makes it inconvenient to use during the laying process.

Description

Technical Field

[0001] The invention relates to the technical field of building stairs, and in particular to a reinforced concrete staircase structure and a construction method thereof. Background Art

[0002] Stairs are composed of continuous steps, platforms and enclosing components; the horizontal projection distance between the lowest and highest steps of the stairs is the stair length, and the total height of the steps is the stair height. In order to facilitate the construction of reinforced concrete stairs, a stair structure is required.

[0003] However, with regard to the current concrete staircase structure, before laying it, it is necessary to fix the wooden boards manually to facilitate the shaping of the staircase structure, which makes it inconvenient to use during the laying process. At the same time, before the concrete staircase structure is used, the position of its stair platform mostly needs to be determined in advance, and the position of the stair platform usually needs to be laid at a higher position, which makes it inconvenient to fix and use. Summary of the invention

[0004] In view of this, the present invention provides a reinforced concrete staircase structure and a construction method thereof, which has a positioning part and a laying part. By starting a control motor, it is convenient to drive the control block to rotate, so that the driving block is controlled to rotate under the action of the latch teeth, so that it is convenient to lift and lower the adjusting rod through the thread control during the rotation, so that it is convenient to adjust the relative position of the platform plate, so that it is convenient to preset the platform position of the stairs, so that it is convenient to use, and by rotating the flip block, it is convenient to adjust the relative position of the flip block, so that after the angle of the flip block is adjusted, it is convenient to maintain the stability of the flip block by plugging the plug rod, so that it is convenient to use, and by splicing the docking rod and the flip block, it is convenient to lay the laying plate, so that it is convenient to cooperate with the tightening plate to shape the staircase structure, so as to facilitate the laying of the stairs.

[0005] The present invention provides a reinforced concrete staircase structure and a construction method thereof, specifically comprising: a fixing part, an adjusting part, a positioning part, and a laying part; the fixing part comprises: a mounting plate; the mounting plate is a square plate-shaped structure, the top of the mounting plate is provided with a cylindrical protrusion, the cylindrical protrusion of the mounting plate is provided with a disc-shaped protrusion, and the bottom of the mounting plate is provided with a control motor; the adjusting part is arranged above the fixing part, the driving block of the adjusting part is rotatably connected in the adjusting groove of the fixing part, and the driving block is connected to the control block of the fixing part through a latch; the positioning part is arranged above the adjusting part, and the platform plate of the positioning part is fixed on the adjusting groove At the top of the adjusting rod of the node, the positioning part includes: a flip block; the flip block is a rectangular block structure, a rectangular groove is provided on the flip block, a trapezoidal connecting groove is provided on the flip block, a cylindrical protrusion is provided on the flip block, a hexagonal columnar through hole is provided on the flip block, and the flip block is rotatably connected in the slot of the positioning part; the laying part is arranged on the side of the positioning part, and the docking rod of the laying part is inserted on the flip block, and the laying part includes: a laying plate; the laying plate is a U-shaped plate structure, a square plate-like protrusion is provided on the outer wall of the laying plate, a circular plug hole is provided on the square plate-like protrusion of the laying plate, and the laying plate is slidably connected to the docking rod.

[0006] Optionally, the adjustment groove is a cylindrical groove, the adjustment groove is connected to a circular through hole, the inner wall of the adjustment groove is connected to a cylindrical groove, the cylindrical groove of the adjustment groove is connected to a circular through hole, and the adjustment groove is arranged inside the mounting plate.

[0007] Optionally, the fixing part also includes: a support frame; the control block is a columnar gear structure, a cylindrical protrusion is provided on the control block, the control block is rotatably connected in the adjustment groove, and the control block is connected to the control motor of the mounting plate; the support frame is a cylindrical rod structure, a disc-shaped protrusion is provided on the support frame, and there are four groups of support frames in total, and the four groups of support frames are respectively fixed to the bottom of the mounting plate by screws.

[0008] Optionally, the driving block is a columnar gear structure, a cylindrical protrusion is provided on the driving block, a threaded through hole is provided on the driving block, and there are four groups of driving blocks in total; the adjusting rod is a threaded rod structure, and cylindrical protrusions are respectively provided on the two bottom surfaces of the adjusting rod, and there are four groups of adjusting rods in total, and the four groups of adjusting rods are respectively threadedly connected to the driving block.

[0009] Optionally, the platform plate is a square plate-shaped structure, and a square plate-shaped groove is provided at the bottom of the platform plate; the slot is a rectangular groove, the slot is connected to a cylindrical groove, the cylindrical groove of the slot is connected to a hexagonal through hole, and the slot is arranged on the outer wall of the platform plate.

[0010] Optionally, the positioning part further includes: an insertion rod; the insertion rod is a hexagonal prism rod-shaped structure, a cylindrical protrusion is provided on the insertion rod, the insertion rod is inserted into the slot, and the insertion rod is inserted into the hexagonal prism-shaped through hole of the flip block.

[0011] Optionally, the laying part also includes: a steel bar groove; the docking rod is a rectangular structure, the docking rod is provided with a T-shaped protrusion, the docking rod is provided with a T-shaped groove, and the docking rod is provided with a rectangular slide groove; the steel bar groove is a circular through hole, the inner wall of the steel bar groove is connected with a rectangular through hole, and the steel bar groove is arranged on the outer wall of the laying board.

[0012] Optionally, the laying part also includes: a tightening plate; the tightening plate is a rectangular block structure, an L-shaped groove is provided on the tightening plate, a rectangular protrusion is provided on the tightening plate, a cylindrical protrusion is provided on the rectangular protrusion of the tightening plate, a rectangular protrusion is provided on the outer wall of the tightening plate, and the tightening plate is plugged into the laying plate.

[0013] Optionally, the construction method comprises the following steps:

[0014] 1. By starting the control motor, the control block is driven to rotate, and the driving block is controlled to rotate under the action of the latch teeth, so that the adjusting rod is controlled to rise and fall through the thread during the rotation, so as to adjust the relative position of the platform board, so that the platform position of the stairs can be preset, making it easy to use;

[0015] 2. By rotating the flip block, it is easy to adjust the relative position of the flip block, so that after the angle of the flip block is adjusted, it is easy to maintain the stability of the flip block by plugging in the plug rod, making it easy to use. By splicing the docking rod with the flip block, it is easy to lay the laying board, so that it is easy to shape the stair structure in conjunction with the tightening plate, so that it is easy to lay the stairs.

[0016] Beneficial Effects

[0017] According to the concrete staircase structure of each embodiment of the present invention, a fixing portion is provided. A cylindrical protrusion is provided on the top of the mounting plate so that when the device is retracted, the platform plate is supported by the cylindrical protrusion, so that it is easy to maintain stability. By providing an adjustment groove on the mounting plate, it is convenient to install the control block and the driving block, so that it is convenient to adjust. The mounting plate is kept stable by the support frame, so as to maintain the stability of the device as a whole.

[0018] In addition, the adjusting part is arranged above the fixed part, and by starting the control motor, it is convenient to drive the control block to rotate, so that it controls the driving block to rotate under the action of the latch teeth, so that it is convenient to control the raising and lowering of the adjusting rod through the thread during the rotation process, so as to facilitate the adjustment of the relative position of the platform plate.

[0019] In addition, the positioning part is arranged above the adjusting part, and the relative position of the flip block can be adjusted by rotating the flip block, so that after the angle of the flip block is adjusted, the flip block can be kept stable by inserting the plug rod, making it easy to use.

[0020] In addition, the laying part is arranged on the side of the positioning part, and the docking rod and the flip block are spliced ​​to preset the position of the stair step by superimposing the docking rod, and the laying plate is slidably connected in the docking rod, so that it is convenient to lay the stairs while maintaining stability, and then the steel bars are stuck in the steel bar groove, and the top tightening plate is inserted into the laying plate, so that it is convenient to cover the top of the laying plate, so as to facilitate the shaping of the stair structure in cooperation with the laying plate, and then by pouring concrete in the gap between the top tightening plate and the laying plate, it is convenient to construct the stair structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0022] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0023] In the attached picture:

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the three-dimensional bottom-up structure of an embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the decomposed structure of an embodiment of the present invention.

[0027] Figure 4 The embodiment of the present invention is Figure 3 Schematic diagram of the enlarged structure of part A.

[0028] Figure 5 It is a schematic diagram of the exploded bottom view structure of an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the partial cross-section structure of an embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of the assembly structure of the fixing part of an embodiment of the present invention.

[0031] Figure 8 It is a schematic diagram of the assembly structure of the adjustment part of an embodiment of the present invention.

[0032] Fig. 9 It is a schematic diagram of the assembly structure of the positioning part of an embodiment of the present invention.

[0033] Fig.10 The embodiment of the present invention is Fig. 9 Schematic diagram of the enlarged structure of part B.

[0034] Fig.11 It is a schematic diagram of the assembly structure of the laying part of an embodiment of the present invention.

[0035] Reference numerals list

[0036] 1. Fixing part; 101. Mounting plate; 102. Adjusting slot; 103. Control block; 104. Support frame; 2. Adjusting part; 201. Driving block; 202. Adjusting rod; 3. Positioning part; 301. Platform plate; 302. Slot; 303. Flipping block; 304. Inserting rod; 4. Laying part; 401. Docking rod; 402. Laying plate; 403. Steel bar slot; 404. Tightening plate. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0038] Example: Please refer to Figures 1 to 11 As shown:

[0039] The present invention provides a reinforced concrete staircase structure and a construction method thereof, comprising: a fixing part 1, an adjusting part 2, a positioning part 3, and a laying part 4; the fixing part 1 comprises: a mounting plate 101; the mounting plate 101 is a square plate-shaped structure, a cylindrical protrusion is provided on the top of the mounting plate 101, a disc-shaped protrusion is provided on the cylindrical protrusion of the mounting plate 101, and a control motor is provided at the bottom of the mounting plate 101; the mounting plate 101 is used to assist in the installation of other structures of the fixing part 1, so that it can drive the control block 103 to rotate by the control motor while maintaining stability, so as to facilitate the adjustment of the device; the adjusting part 2 is arranged above the fixing part 1, and the driving block 201 of the adjusting part 2 is rotatably connected in the adjusting groove 102 of the fixing part 1, and the driving block 201 is connected to the control block 103 of the fixing part 1 through a latch; the positioning part 3 is arranged above the adjusting part 2, and the platform plate 301 of the positioning part 3 is fixed on the top of the adjusting rod 202 of the adjusting part 2, and the positioning part 3 comprises: a flip block 303; the flip block 303 is a rectangular block structure, a rectangular groove is provided on the flip block 303, a trapezoidal connecting groove is provided on the flip block 303, a cylindrical protrusion is provided on the flip block 303, a hexagonal columnar through hole is provided on the flip block 303, and the flip block 303 is rotatably connected to the slot 302 of the positioning part 3; the flip block 303 is used to adjust the laying angle of the laying part 4 by rotation, so that it is convenient to lay the concrete stairs, thereby facilitating its use; the laying part 4 is provided Placed on the side of the positioning part 3, the docking rod 401 of the laying part 4 is inserted into the flip block 303, and the laying part 4 includes: a laying plate 402; the laying plate 402 is a U-shaped plate structure, and a square plate-like protrusion is provided on the outer wall of the laying plate 402, and a circular plug hole is provided on the square plate-like protrusion of the laying plate 402, and the laying plate 402 is slidably connected to the docking rod 401; the laying plate 402 is used to cooperate with the tightening plate 404 to shape the stair structure, so as to facilitate its use.

[0040] like Figure 7As shown, the adjusting groove 102 is a cylindrical groove, the adjusting groove 102 is connected with a circular through hole, the inner wall of the adjusting groove 102 is connected with a cylindrical groove, the cylindrical groove of the adjusting groove 102 is connected with a circular through hole, and the adjusting groove 102 is arranged inside the mounting plate 101; the adjusting groove 102 is used to assist in the installation of the control block 103 and the driving block 201, so that it is easy to adjust while maintaining stability, thereby facilitating its use; the fixing part 1 also includes: a support frame 104; the control block 103 is a columnar gear structure, the control block 103 is provided with a cylindrical protrusion, and the control block 103 is rotatably connected to the adjusting groove 10 2, the control block 103 is connected to the control motor of the mounting plate 101; the control block 103 is used to rotate under the action of the control motor, so that it is convenient to control the driving block 201 to rotate through the latch gear, so that it is convenient to control the adjustment rod 202 for adjustment, so that it is convenient to use; the support frame 104 is a cylindrical rod-shaped structure, and a disc-shaped protrusion is provided on the support frame 104. There are four groups of support frames 104, and the four groups of support frames 104 are respectively fixed to the bottom of the mounting plate 101 by screws; the support frame 104 is used to auxiliary support the mounting plate 101, so that the overall device can be kept stable and convenient to use.

[0041] like Figure 8 As shown, the driving block 201 is a columnar gear structure, a cylindrical protrusion is provided on the driving block 201, a threaded through hole is provided on the driving block 201, and there are four groups of driving blocks 201; the driving block 201 is used to rotate under the action of the control block 103, and the adjusting rod 202 is raised and lowered by controlling the thread during the rotation, so that it is convenient to adjust the relative position of the platform plate 301, thereby facilitating the preset of the platform position of the stairs, so as to facilitate its use; the adjusting rod 202 is a threaded rod structure, and cylindrical protrusions are respectively provided on the two bottom surfaces of the adjusting rod 202, and there are four groups of adjusting rods 202, and the four groups of adjusting rods 202 are respectively threadedly connected to the driving block 201; the adjusting rod 202 is used to adjust the position under the action of the driving block 201, so as to facilitate the adjustment of the relative position of the platform plate 301, so that it is convenient to preset the stairs, so as to facilitate its use.

[0042] like Figures 9 and 10As shown, the platform plate 301 is a square plate structure, and a square plate groove is provided at the bottom of the platform plate 301; the platform plate 301 is used to assist in laying the platform position of the stairs, so as to facilitate the laying of the stairs and make it easy to use; the slot 302 is a rectangular groove, the slot 302 is connected to a cylindrical groove, the cylindrical groove of the slot 302 is connected to a hexagonal prism-shaped through hole, and the slot 302 is set on the outer wall of the platform plate 301; the slot 302 is used to assist in installing the flip block 303, so that it is easy to The angle is adjusted, and the flip block 303 is fixed with the insertion rod 304, so as to facilitate its use; the positioning part 3 also includes: the insertion rod 304; the insertion rod 304 is a hexagonal rod-shaped structure, and the insertion rod 304 is provided with a cylindrical protrusion. The insertion rod 304 is inserted into the slot 302, and the insertion rod 304 is inserted into the hexagonal through hole of the flip block 303; the insertion rod 304 is used to fix the flip block 303, so as to facilitate maintaining the angle of the flip block 303, so that it is convenient to perform preset processing, so as to facilitate paving the stairs.

[0043] like Fig.11 As shown, the laying part 4 also includes: a steel bar groove 403; the docking rod 401 is a rectangular parallelepiped structure, the docking rod 401 is provided with a T-shaped protrusion, the docking rod 401 is provided with a T-shaped groove, and the docking rod 401 is provided with a rectangular slide; the docking rod 401 is used to install and fix other structures of the laying part 4, so as to facilitate its use and make it convenient to lay stairs; the steel bar groove 403 is a circular through hole, and the inner wall of the steel bar groove 403 is connected with a rectangular through hole, and the steel bar groove 403 is arranged on the outer wall of the laying plate 402; the steel bar groove 403 is used to fix the required stairs The steel bar structure is convenient for laying the stairs and making it easy to use; the laying part 4 also includes: a tightening plate 404; the tightening plate 404 is a rectangular block structure, an L-shaped groove is provided on the tightening plate 404, a rectangular protrusion is provided on the tightening plate 404, a cylindrical protrusion is provided on the rectangular protrusion of the tightening plate 404, a rectangular protrusion is provided on the outer wall of the tightening plate 404, and the tightening plate 404 is plugged into the laying plate 402; the tightening plate 404 is used to shape the staircase structure, so as to facilitate the laying of the stairs and to facilitate the pouring of concrete.

[0044] The invention discloses a construction method of a reinforced concrete staircase structure, comprising the following steps:

[0045] 1. By starting the control motor, the control block 103 is driven to rotate, so that the driving block 201 is controlled to rotate under the action of the latch teeth, so that the adjusting rod 202 is controlled to rise and fall through the thread during the rotation, so as to adjust the relative position of the platform plate 301, so that the platform position of the stairs can be preset, so that it is convenient to use;

[0046] 2. By rotating the flip block 303, it is easy to adjust the relative position of the flip block 303, so that after the angle of the flip block 303 is adjusted, by plugging the plug rod 304, it is easy to maintain the stability of the flip block 303, so that it is easy to use, and by splicing the docking rod 401 with the flip block 303, it is easy to lay the laying board 402, so that it is easy to cooperate with the tightening plate 404 to shape the stair structure, so as to facilitate the laying of the stairs.

[0047] Specific usage and function of this embodiment: In the present invention, before use, the device needs to be moved to the specified position by manpower, and the mounting plate 101 is kept stable by the support frame 104, so as to facilitate the stability of the device. When in use, the control motor is started to drive the control block 103 to rotate, so that it controls the driving block 201 to rotate under the action of the latch teeth, so that it is convenient to control the adjustment rod 202 to rise and fall during the rotation process, so as to facilitate the adjustment of the platform plate 301. The relative position of the platform plate 301 is adjusted, so that it is convenient to preset the platform position of the stairs, so that it is convenient to use, and then by rotating the flip block 303, it is convenient to adjust the relative position of the flip block 303, so that after the angle of the flip block 303 is adjusted, the plug rod 304 is plugged in, so as to facilitate the stability of the flip block 303. It is convenient to use, and by splicing the docking rod 401 with the flip block 303, the position of the stair step is preset by superimposing the docking rod 401, and by sliding the laying plate 402 in the docking rod 401, it is convenient to lay the stairs while maintaining stability, and then the steel bars are stuck in the steel bar groove 403, and the top tightening plate 404 is inserted on the laying plate 402, so that it is convenient to cover the top of the laying plate 402, so as to facilitate the shaping of the stair structure in conjunction with the laying plate 402, and then by pouring concrete in the gap between the top tightening plate 404 and the laying plate 402, it is convenient to construct the stair structure, and then after the concrete solidifies, by removing the top tightening plate 404 and the laying plate 402, it is convenient to recycle the equipment and make it convenient to use.

Claims

1. A reinforced concrete staircase structure, characterized in that: include: A fixing part (1), an adjusting part (2), a positioning part (3), and a laying part (4); The fixing portion (1) comprises: a mounting plate (101), an adjusting groove (102) and a support frame (104); the mounting plate (101) is a square plate-shaped structure, a cylindrical protrusion is provided on the top of the mounting plate (101), a disc-shaped protrusion is provided on the cylindrical protrusion of the mounting plate (101), and a control motor is provided on the bottom of the mounting plate (101); the adjusting groove (102) is a cylindrical groove, the adjusting groove (102) is connected to a circular through hole, the inner wall of the adjusting groove (102) is connected to a cylindrical groove, the cylindrical groove of the adjusting groove (102) is connected to a circular through hole, and the adjusting groove (102) is arranged inside the mounting plate (101); the support frame (104) is a cylindrical rod-shaped structure, and the support frame ( The adjusting portion (2) is provided with a disc-shaped protrusion on the adjusting portion (104), and the supporting frame (104) is provided with four groups, and the four groups of supporting frames (104) are respectively fixed to the bottom of the mounting plate (101) by screws; the adjusting portion (2) is arranged above the fixing portion (1), and the driving block (201) of the adjusting portion (2) is rotatably connected in the adjusting groove (102), and the driving block (201) is connected to the control block (103) of the fixing portion (1) by means of latching teeth; the positioning portion (3) is arranged above the adjusting portion (2), and the platform plate (301) of the positioning portion (3) is fixed to the top of the adjusting rod (202) of the adjusting portion (2), and the positioning portion (3) comprises: a flip block (303) and an insert rod (304); the flip block (303) is a rectangular block The flip block (303) has a rectangular groove, a trapezoidal connecting groove, a cylindrical protrusion, a hexagonal prism-shaped through hole, and the flip block (303) is rotatably connected to the slot (302) of the positioning portion (3); the insertion rod (304) is a hexagonal prism-shaped structure, the insertion rod (304) is provided with a cylindrical protrusion, the insertion rod (304) is inserted into the slot (302), and the insertion rod (304) is inserted into the hexagonal prism-shaped through hole of the flip block (303); the laying portion (4) is arranged on the side of the positioning portion (3), the docking rod (401) of the laying portion (4) is inserted into the flip block (303), and the laying portion (4) includes : a laying plate (402), a steel bar groove (403), and a tightening plate (404); the laying plate (402) is a U-shaped plate structure, a square plate-shaped protrusion is provided on the outer wall of the laying plate (402), a circular plug hole is provided on the square plate-shaped protrusion of the laying plate (402), and the laying plate (402) is slidably connected to the docking rod (401); the docking rod (401) is a rectangular parallelepiped structure, a T-shaped protrusion is provided on the docking rod (401), a T-shaped groove is provided on the docking rod (401), and a rectangular sliding groove is provided on the docking rod (401); the steel bar groove (403) is a circular through hole, a rectangular through hole is connected on the inner wall of the steel bar groove (403), and the steel bar groove (403) is arranged on the outer wall of the laying plate (402);The top tightening plate (404) is a rectangular block structure, an L-shaped groove is provided on the top tightening plate (404), a rectangular protrusion is provided on the top tightening plate (404), a cylindrical protrusion is provided on the rectangular protrusion of the top tightening plate (404), a rectangular protrusion is provided on the outer wall of the top tightening plate (404), and the top tightening plate (404) is plugged into the laying plate (402).

2. A reinforced concrete staircase structure as claimed in claim 1, characterized in that: The control block (103) is a columnar gear structure. A cylindrical protrusion is provided on the control block (103). The control block (103) is rotatably connected in the adjustment groove (102). The control block (103) is connected to a control motor of the mounting plate (101).

3. A reinforced concrete staircase structure as claimed in claim 1, characterized in that: The driving block (201) is a columnar gear structure, the driving block (201) is provided with a cylindrical protrusion, the driving block (201) is provided with a threaded through hole, and the driving block (201) is provided with four groups; the adjusting rod (202) is a threaded rod structure, the two bottom surfaces of the adjusting rod (202) are respectively provided with cylindrical protrusions, and the adjusting rod (202) is provided with four groups, and the four groups of adjusting rods (202) are respectively threadedly connected to the driving block (201).

4. A reinforced concrete staircase structure as claimed in claim 1, characterized in that: The platform plate (301) is a square plate-shaped structure, and a square plate-shaped groove is provided at the bottom of the platform plate (301); the slot (302) is a rectangular groove, the slot (302) is connected to a cylindrical groove, the cylindrical groove of the slot (302) is connected to a hexagonal prism-shaped through hole, and the slot (302) is arranged on the outer wall of the platform plate (301).

5. A method for constructing a reinforced concrete staircase structure according to any one of claims 1 to 4, characterized in that: The following steps are involved: 1) By starting the control motor, the control block (103) is driven to rotate, so that the driving block (201) is controlled to rotate under the action of the latching teeth, so that the adjusting rod (202) is controlled to rise and fall during the rotation process, so as to adjust the relative position of the platform plate (301), so that the platform position of the staircase can be preset, so that it is easy to use; 2) By rotating the flip block (303), it is convenient to adjust the relative position of the flip block (303), so that after the angle of the flip block (303) is adjusted, the plug rod (304) is plugged in, so that the flip block (303) is stable and easy to use. By splicing the docking rod (401) and the flip block (303), it is convenient to lay the laying plate (402), so that it is convenient to cooperate with the top tightening plate (404) to shape the staircase structure, so as to facilitate the laying of the stairs.

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