A safety protection structure for prefabricated stairs in assembled buildings

Abstract

The present invention relates to a safety protection structure of a prefabricated staircase in an assembled building, belongs to the technical field of assembled building construction, and includes a prefabricated staircase structure and a protection frame, wherein the prefabricated staircase structure includes multiple layers of floor plates arranged in sequence from bottom to top, an intermediate layer plate is arranged between adjacent floor plates, the intermediate layer plate is connected to the floor plate located at the lower layer through a lower staircase section, the intermediate layer plate is connected to the floor plate located at the upper layer through an upper staircase section, a plurality of reserved holes are arranged on the tread surfaces of the lower staircase section and the upper staircase section, the protection frame includes guardrails respectively located on the upper staircase section and the lower staircase section, the guardrail located on the upper staircase section is connected to the reserved hole on the upper staircase section by plugging, the guardrail located on the lower staircase section is connected to the reserved hole on the lower staircase section by plugging, and a detachable protection structure is arranged between the upper and lower adjacent guardrails. The present invention will not cause damage to the prefabricated staircase when it is built.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and in particular to a safety protection structure of a prefabricated staircase in a prefabricated building. Background Art

[0002] In the construction process of prefabricated houses, prefabricated stairs are an indispensable prefabricated component. Before installing the formal stair guardrail, the construction site needs to make temporary protection on the prefabricated stairs to protect the construction workers from falling down the stairs when going up and down the stairs.

[0003] The existing temporary steel pipe stair guardrail needs to set a welding point at the bottom to fix the guardrail to prevent overturning during installation, so it is necessary to reserve steel bars on the stair treads for welding. However, as a finished staircase, prefabricated stairs are generally not equipped with reserved steel bars for welding stair guardrails in order to ensure the appearance quality of the prefabricated stairs during the production process. If you want to add welded steel bars to the stairs later, it will damage the prefabricated stairs. The prefabricated stairs used in prefabricated buildings do not allow any damage to the stair treads, so the traditional temporary steel pipe stair guardrail cannot be applied to the protection of prefabricated stairs. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a safety protection structure for prefabricated stairs in an assembled building, which will not cause damage to the prefabricated stairs during construction.

[0005] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0006] A safety protection structure for prefabricated stairs in an assembled building, comprising a prefabricated staircase structure and a protection frame, the prefabricated staircase structure comprising multiple layers of floor plates arranged in sequence from bottom to top, an intermediate layer plate arranged between adjacent floor plates, the intermediate layer plate connected to the floor plate located at the lower layer through a lower stair section, the intermediate layer plate connected to the floor plate located at the upper layer through an upper stair section, a plurality of reserved holes are arranged on the tread surfaces of the lower stair section and the upper stair section, the protection frame comprising guardrails respectively located on the upper stair section and the lower stair section, the guardrails located on the upper stair section are plug-connected to the reserved holes on the upper stair section, the guardrails located on the lower stair section are plug-connected to the reserved holes on the lower stair section, a protection structure is arranged between upper and lower adjacent guardrails, and the protection structure is detachably connected to upper and lower adjacent guardrails.

[0007] By adopting the above technical solution, by plugging the guardrail into the reserved hole on the corresponding upper staircase or lower staircase, and connecting the upper and lower adjacent guardrails together through the protective structure, when the safety protection structure is built, the structure of the prefabricated stairs will not be damaged. At the same time, when it is necessary to dismantle the protective structure located on the middle floor, the guardrail is plugged into the corresponding upper staircase or lower staircase, thereby not affecting the safety protection structure of the upper floor or lower floor.

[0008] In a preferred example, the present invention can be further configured as follows: the guardrail includes at least two fixing seats respectively inserted into different reserved holes and a railing arranged along the inclination angle of the lower stair section or the upper stair section, and the railing is detachably connected to the fixing seats.

[0009] By adopting the above technical solution, the guardrail can be disassembled, thereby making it easier for construction workers to carry it during the transportation process.

[0010] In a preferred example, the present invention can be further configured as follows: the fixing seat includes an insertion rod whose bottom end is inserted into the reserved hole and a sleeve located at the top end of the insertion rod, the railing can pass through the inner hole of the sleeve, and the angle between the sleeve and the insertion rod is set, and the angle between the sleeve and the insertion rod bracket is the same as the angle between the upper stair section and the horizontal plane or the angle between the lower stair section and the horizontal plane, the railing passes through the sleeve on the fixing seat in turn, and a locking structure is set between the sleeve and the railing to lock the relative position of the sleeve and the railing.

[0011] By adopting the above technical solution, the relative position between the fixing seat and the handrail can be adjusted according to actual conditions, so that the handrail can adapt to upper stair sections or lower stair sections of different specifications.

[0012] In a preferred example, the present invention can be further configured as follows: the locking structure includes a plurality of modular holes spaced apart along the length direction of the railing, a locking bolt penetrating through the closure of the sleeve and threadedly connected to the sleeve wall is provided on the tube wall of the sleeve, the locking bolt can be inserted into the modular hole, and when the railing moves along the axial direction of the sleeve, the modular holes on the railing can be aligned with the locking bolts one by one and enable the locking bolts to be inserted into the modular holes.

[0013] By adopting the above technical solution, the locking bolt is inserted into the corresponding modular hole, so that the relative position of the sleeve and the railing can be quickly fixed, which has the advantage of simple operation.

[0014] In a preferred example, the present invention can be further configured as follows: the angle between the sleeve and the insertion rod is adjustable.

[0015] By adopting the above technical solution, the angle between the sleeve and the insertion rod can be adjusted by using upper stair sections and lower stair sections with different inclination angles, thereby increasing the use range of the guardrail.

[0016] In a preferred example, the present invention can be further configured as follows: the sleeve is rotatably connected to the insertion rod through a rotating shaft, a plurality of positioning holes arranged along the circumferential direction of the rotating shaft are provided on the side wall of the rotating shaft, a fixing block is provided on the insertion rod, a fixing piece perpendicular to the rotating shaft is provided on the fixing block, the fixing piece is threadedly connected to the fixing block, when the rotating shaft rotates, the positioning holes on the rotating shaft are opposite to the fixing pieces one by one, and when the fixing pieces move toward the rotating shaft, the fixing pieces can be inserted into the corresponding positioning holes.

[0017] By adopting the above technical solution, the angle between the sleeve and the insertion rod can be quickly fixed, and it is only necessary to control the fixing member to be inserted into the corresponding positioning hole.

[0018] In a preferred example, the present invention can be further configured as follows: the sleeve and the insertion rod are fixedly connected by welding.

[0019] By adopting the above technical solution, when the guardrail is hit during use, the connection between the guardrail and the insertion rod is not likely to be detached.

[0020] In a preferred example, the present invention can be further configured as follows: a conical elastic sleeve is provided on the outside of the insertion rod, the small end of the elastic sleeve faces the bottom end of the insertion rod, the small end of the elastic sleeve can be inserted into the reserved hole along with the insertion rod, and the area enclosed by the outer contour of the large end of the elastic sleeve is larger than the cross-sectional area of ​​the reserved hole.

[0021] By adopting the above technical solution, the upper staircase or the lower staircase can be protected by the elastic sleeve, so that when the guardrail is hit, the insertion rod is not likely to cause damage to the upper staircase or the lower staircase.

[0022] In a preferred example, the present invention can be further configured as follows: the protective structure includes a connecting column vertically arranged between two adjacent guardrails, the two ends of the connecting column are respectively detachably connected to the two adjacent guardrails, a diagonal brace is arranged between the connecting column and the guardrail on the upper layer, the two ends of the diagonal brace are respectively detachably connected to the connecting column and the guardrail on the upper layer, and a triangular structure is enclosed between the diagonal brace, the connecting column and the guardrail on the upper layer.

[0023] By adopting the above technical solution, a triangular structure is enclosed between the diagonal braces, the connecting columns and the guardrails located on the upper layer. Due to the triangular structure, the stability of the protective structure can be ensured.

[0024] In a preferred example, the present invention can be further configured as follows: the connecting column includes a main body and a threaded rod arranged in sequence from bottom to top, the threaded rod is detachably connected to the main body, a clamping plate is slidably connected to the threaded rod, a clamping sleeve is threadedly connected to the threaded rod, and the clamping sleeve is located below the clamping rod.

[0025] By adopting the above technical solution, when dismantling the protective structure at the middle floor, the main body of the connecting column is directly dismantled, the threaded rod is retained, and the clamping plate is pushed through the clamping sleeve so that the clamping plate is pressed against the bottom end surface of the lower stair section or the upper stair section, thereby increasing the stability of the guardrail.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects:

[0027] 1. By plugging the guardrail into the reserved hole on the corresponding upper staircase or lower staircase, and connecting the upper and lower adjacent guardrails together through the protective structure, the structure of the prefabricated staircase will not be damaged when the safety protection structure is built. At the same time, when the protective structure located at the middle floor needs to be removed, the guardrail is plugged into the corresponding upper staircase or lower staircase, so as not to affect the safety protection structure of the upper floor or lower floor;

[0028] 2. When dismantling the protective structure at the middle floor, just dismantle the main body of the connecting column, retain the threaded rod, and push the clamping plate through the clamping sleeve to make the clamping plate press against the bottom end surface of the lower staircase or the upper staircase, thereby increasing the stability of the guardrail. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of Example 1;

[0030] Figure 2 It is a schematic diagram of the structure of the guardrail;

[0031] Figure 3 is a schematic structural diagram of Example 2;

[0032] Figure 4 is a schematic structural diagram of Example 3;

[0033] Figure 5 is an exploded schematic diagram of the first connecting column;

[0034] Figure 6 This is an exploded view of the second connecting column.

[0035] In the figure, 1, prefabricated staircase structure; 11, floor plate; 12, middle layer plate; 13, lower staircase; 14, upper staircase; 15, reserved hole; 2, protective frame; 21, guardrail; 211, fixing seat; 2111, plug rod; 2112, sleeve; 2113, locking bolt; 2114, elastic sleeve; 212, handrail; 2121, modular hole; 22, first connecting column; 221, first body; 2211, The first threaded hole; 222, the first threaded rod; 223, the first clamping plate; 2231, the first through hole; 224, the first clamping sleeve; 23, the diagonal support; 24, the second connecting column; 241, the second body; 2411, the second threaded hole; 242, the second threaded rod; 243, the second clamping plate; 2431, the second through hole; 244, the second clamping sleeve; 3, the rotating shaft; 31, the positioning hole; 4, the fixing block; 41, the fixing bolt. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Reference Figure 1 , which is a safety protection structure of a prefabricated staircase in an assembled building disclosed in the present invention, comprising a prefabricated staircase structure 1 and a protection frame 2.

[0038] The prefabricated staircase structure 1 includes a plurality of floor plates 11 arranged in sequence from bottom to top. Except for the floor plate 11 at the top, the other floor plates 11 are all provided with intermediate floor plates 12 obliquely above. The adjacent floor plates 11 located below the intermediate floor plates 12 are connected to the intermediate floor plates 12 through the inclined lower staircase sections 13, and the intermediate floor plates 12 are connected to the adjacent floor plates 11 located above the intermediate floor plates 12 through the inclined upper staircase sections 14. The lower staircase sections 13 and the upper staircase sections 14 are transversely offset and inclined in opposite directions.

[0039] The tread surfaces of the steps of the lower stair section 13 and the upper stair section 14 are both provided with reserved holes 15 for the finished railings, wherein the reserved holes 15 on the lower stair section 13 are located on the side of the lower stair section 13 facing the upper stair section 14, and the reserved holes 15 on the upper stair section 14 are located on the side of the upper stair section 14 facing the lower stair section 13.

[0040] The protection frame 2 includes guardrails 21 respectively mounted on the lower staircase 13 and the upper staircase 14, wherein the guardrail 21 on the lower staircase 13 is located on the side of the lower staircase 13 facing the upper staircase 14, and the guardrail 21 on the upper staircase 14 is located on the side of the upper staircase 14 facing the lower staircase 13. The guardrails 21 on the lower staircase 13 and the upper staircase 14 are plugged and connected between the lower staircase 13 and the upper staircase 14, respectively.

[0041] Reference Figure 2 The guardrail 21 includes at least two fixing seats 211 whose bottom ends can be inserted into the reserved holes 15 and a railing 212. The fixing seat 211 includes an insertion rod 2111 whose bottom end is inserted into the reserved hole 15 and a sleeve 2112 arranged at an angle with the insertion rod 2111, and the sleeve 2112 and the insertion rod 2111 are welded and fixedly connected. The angle of the sleeve 2112 is the same as the angle between the lower staircase 13 or the upper staircase 14 and the horizontal plane. The railing 212 passes through the inner hole of the sleeve 2112 in the fixing seat 211 in sequence, thereby being slidably connected with the fixing seat 211.

[0042] A plurality of modular holes 2121 are provided on the side wall of the railing 212 at intervals along the length direction of the railing 212. A locking bolt 2113 is threadedly connected to the tube wall of the sleeve 2112, and the locking bolt 2113 passes through the tube wall of the sleeve 2112 to communicate with the inner hole of the sleeve 2112. The modular hole 2121 on the railing 212 is opposite to the side wall of the sleeve 2112 with the locking bolt 2113. When the railing 212 moves along the axial direction of the sleeve 2112, the locking bolt 2113 can be coaxially opposite to the modular hole 2121 on the railing 212 in sequence. The size of the locking bolt 2113 can be such that one end of the locking bolt 2113 facing the inner hole of the sleeve 2112 is inserted into the modular hole 2121 on the railing 212. When the locking bolt 2113 is inserted into the modular hole 2121 in the railing 212, the relative positions of the sleeve 2112 and the railing 212 are locked.

[0043] A conical elastic sleeve 2114 is sleeved on the outside of the insertion rod 2111, and the elastic sleeve 2114 and the insertion rod 2111 are fixed together by glue. The small end of the elastic sleeve 2114 faces the bottom of the insertion rod 2111. The large end of the elastic sleeve 2114 faces the top of the insertion rod 2111. The small end of the elastic sleeve 2114 can be inserted into the inside of the reserved hole 15, and the area surrounded by the outer contour of the large end of the elastic sleeve 2114 is larger than the cross-sectional area of ​​the reserved hole 15.

[0044] In this embodiment, two fixing seats 211 are used, and the two fixing seats 211 are respectively inserted into the reserved holes 15 located at the bottom and top of the lower stair section 13 or the upper stair section 14 .

[0045] Reference Figure 1 A vertically arranged first connecting column 22 is arranged between the lower staircase 13 and the upper staircase 14 on the same floor. The bottom end of the first connecting column 22 is fixed to a fixing seat 211 at the bottom end of the guardrail 21 on the lower staircase 13 by bolts, and the top end of the first connecting column 22 is fixed to a fixing seat 211 at the top end of the guardrail 21 on the upper staircase 14 by bolts.

[0046] A plurality of diagonal braces 23 are arranged between the first connection column 22 and the railing 212 in the guardrail 21 on the upper staircase 14. One end of the diagonal brace 23 is fixed to the first connection column 22 by bolts, and the other end of the diagonal brace 23 is fixed to the railing 212 in the guardrail 21 on the upper staircase 14 by bolts. A triangular structure is formed between the diagonal brace 23, the first connection column 22, and the railing 212 in the guardrail 21 on the upper staircase 14.

[0047] The first connecting column 22 and the diagonal brace 23 form a protective structure between the upper staircase 14 and the lower staircase 13 .

[0048] A second vertically arranged connecting column 24 is arranged between the guardrail 21 on the upper stair section 14 located in the lower floor and the guardrail 21 on the lower stair section 13 located in the upper floor, and the bottom end of the second connecting column 24 is fixed to a fixing seat 211 at the bottom end of the guardrail 21 on the upper stair section 14 by bolts, and the top end of the second connecting column 24 is fixed to a fixing seat 211 at the top end of the guardrail 21 on the lower stair section 13 located in the upper floor by bolts.

[0049] A plurality of diagonal braces 23 are also provided between the second connection column 24 and the guardrail 21 in the guardrail 21 on the lower staircase 13 on the upper layer, and one end of the diagonal brace 23 is fixed to the second connection column 24 by bolts. The other end of the diagonal brace 23 is fixed to the railing 212 in the guardrail 21 on the lower staircase 13 on the upper layer by bolts. A triangular structure is formed between the diagonal brace 23, the second connection column 24, and the railing 212 in the guardrail 21 on the lower staircase 13 on the upper layer.

[0050] The second connecting column 24 and the diagonal brace 23 form a protective structure between the upper staircase 14 and the lower staircase 13 located on the upper level.

[0051] Embodiment 2:

[0052] Reference Figure 3 , is a safety protection structure for prefabricated stairs in an assembled building disclosed by the present invention. The difference between Example 2 and Example 1 is that: the sleeve 2112 is located on one side of the plug rod 2111 and the angle between the sleeve 2112 and the plug rod 2111 is adjustable. The sleeve 2112 is rotatably connected to the plug rod 2111 through the rotating shaft 3, wherein the rotating shaft 3 and the sleeve 2112 are welded and fixed, and the axis of the rotating shaft 3 is perpendicular to the axis of the plug rod 2111. The rotating shaft 3 passes through the plug rod 2111 and is exposed from the side of the plug rod 2111 away from the sleeve 2112.

[0053] At one end of the rotating shaft 3 away from the sleeve 2112, a plurality of positioning holes 31 are provided on the side wall of the rotating shaft 3 along the circumferential direction of the rotating shaft 3. A fixing block 4 is fixed on the side wall of the insert rod 2111 away from the sleeve 2112, and the fixing block 4 is located directly above the rotating shaft 3. A fixing bolt 41 is provided on the fixing block 4, which vertically penetrates the fixing block 4 and is threadedly connected to the fixing block 4. The fixing bolt 41 is opposite to the positioning hole 31 in the upper and lower parts, and the bottom end of the fixing bolt 41 can be inserted into the positioning hole 31.

[0054] When the rotating shaft 3 rotates, the positioning holes 31 on the rotating shaft 3 are coaxially opposite to the fixing bolts 41 in sequence, and the length of the fixing bolts 41 can be inserted into the corresponding positioning holes 31 on the rotating shaft 3 when the fixing bolts 41 move downward. When the positioning holes 31 are opposite to the fixing bolts 41, the fixing bolts 41 are rotated to insert the fixing bolts 41 into the corresponding positioning holes 31, thereby fixing the angle between the insertion rod 2111 and the sleeve 2112.

[0055] Embodiment 3:

[0056] Reference Figure 4 , is a safety protection structure of a prefabricated staircase in an assembled building disclosed by the present invention. The difference between Example 3 and Example 1 is that the first connecting column 22 includes a first body 221 and a first threaded rod 222 arranged in sequence from bottom to top. The bottom end of the first threaded rod 222 is exposed from the lower surface of the upper staircase section 14.

[0057] Reference Figure 5 The first body 221 is provided with a first threaded hole 2211 matching the first threaded rod 222 at one end thereof facing the first threaded rod 222. The first threaded rod 222 extends into the first threaded hole 2211 and is threadedly connected to the first body 221. A first clamping plate 223 is slidably connected to the first threaded rod 222. A first through hole 2231 is provided at one end of the first clamping plate 223, and the diameter of the first through hole 2231 is larger than the diameter of the first threaded rod 222. The first threaded rod 222 is passed through the first through hole 2231 of the first clamping plate 223, thereby connecting the first threaded rod 222 to the first clamping plate 223.

[0058] The first threaded rod 222 is provided with a first clamping sleeve 224 threadedly connected to the first threaded rod 222. The first clamping sleeve 224 is located below the first clamping plate 223. When the first clamping sleeve 224 moves upward, the first clamping sleeve 224 can push the first clamping plate 223 to abut against the lower surface of the upper staircase 14.

[0059] Reference Figure 6The second connecting column 24 includes a second body 241 and a second threaded rod 242 arranged in sequence from bottom to top, and the bottom end of the second threaded rod 242 is exposed from the lower surface of the lower staircase 13. The second body 241 is provided with a second threaded hole 2411 matching the second threaded rod 242 at one end thereof facing the second threaded rod 242, and the second threaded rod 242 extends into the second threaded hole 2411 to be threadedly connected with the second body 241.

[0060] A second clamping plate 243 is slidably connected to the second threaded rod 242, and a second through hole 2431 is formed at one end of the second clamping plate 243, and the diameter of the second through hole 2431 is larger than the diameter of the second threaded rod 242. The second threaded rod 242 is connected to the second clamping plate 243 by passing the second threaded rod 242 through the second through hole 2431 of the second clamping plate 243.

[0061] The second threaded rod 242 is sleeved with a second clamping sleeve 244 threadedly connected to the second threaded rod 242, and the second clamping sleeve 244 is located below the second clamping plate 243. When the second clamping sleeve 244 moves upward, the second clamping sleeve 244 can push the second clamping plate 243 to abut against the lower surface of the upper staircase 14.

[0062] Reference Figure 4 By making the first clamping plate 223 tightly against the lower surface of the upper staircase 14 and the second clamping plate 243 tightly against the lower surface of the lower staircase 13, the stability of the guardrail 21 can be increased.

[0063] When it is necessary to remove the first connecting column 22 and the second connecting column 24 between the upper stair section 14 and the lower stair section 13 in the middle floor, loosen the bolts at the bottom ends of the first connecting column 22 and the second connecting column 24, and then remove the first body 221 of the first connecting column 22 and the second body 241 of the second connecting column 24 from the first threaded rod 222 and the second threaded rod 242 respectively, and then abut the lower surface of the upper stair section 14 through the first clamping plate 223, and tighten the second clamping plate 243 against the lower surface of the lower stair section 13, thereby increasing the stability of the guardrail 21 at the disassembly location.

[0064] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety protection structure for a prefabricated staircase in an assembled building, comprising a prefabricated staircase structure (1) and a protection frame (2), wherein the prefabricated staircase structure (1) comprises a plurality of floor plates (11) arranged in sequence from bottom to top, an intermediate layer plate (12) is arranged between adjacent floor plates (11), the intermediate layer plate (12) is connected to the floor plate (11) located at the lower layer through a lower staircase section (13), the intermediate layer plate (12) is connected to the floor plate (11) located at the upper layer through an upper staircase section (14), a plurality of reserved holes (15) are arranged on the tread surfaces of the lower staircase section (13) and the upper staircase section (14), and characterized in that: The protection frame (2) comprises guardrails (21) respectively located on the upper staircase (14) and the lower staircase (13); the guardrail (21) located on the upper staircase (14) is plugged and connected to the reserved hole (15) on the upper staircase (14); the guardrail (21) located on the lower staircase (13) is plugged and connected to the reserved hole (15) on the lower staircase (13); a protection structure is provided between the upper and lower adjacent guardrails (21); the protection structure is detachably connected to the upper and lower adjacent guardrails (21); The guardrail (21) comprises at least two fixing seats (211) respectively inserted into different reserved holes (15) and a handrail (212) arranged along the inclination angle of the lower staircase (13) or the upper staircase (14), and the handrail (212) is detachably connected to the fixing seat (211); The fixing seat (211) comprises an insertion rod (2111) whose bottom end is inserted into the reserved hole (15) and a sleeve (2112) located at the top end of the insertion rod (2111); the handrail (212) can pass through the inner hole of the sleeve (2112); an angle is set between the sleeve (2112) and the insertion rod (2111); the angle between the sleeve (2112) and the insertion rod (2111) bracket is the same as the angle between the upper staircase section (14) and the horizontal plane or the angle between the lower staircase section (13) and the horizontal plane; the handrail (212) passes through the sleeve (2112) on the fixing seat (211) in sequence; and a locking structure is set between the sleeve (2112) and the handrail (212) to lock the relative position of the sleeve (2112) and the handrail (212); The protective structure comprises a connecting column vertically arranged between two upper and lower adjacent guardrails (21), the two ends of the connecting column being detachably connected to the two upper and lower adjacent guardrails (21), an oblique brace (23) being arranged between the connecting column and the guardrail (21) located on the upper layer, the two ends of the oblique brace (23) being detachably connected to the connecting column and the guardrail (21) located on the upper layer, and a triangular structure is enclosed between the oblique brace (23), the connecting column and the guardrail (21) located on the upper layer.

2. A safety protection structure for prefabricated stairs in an assembled building according to claim 1, characterized in that: The locking structure comprises a plurality of modular holes (2121) arranged at intervals along the length direction of the railing (212); a locking bolt (2113) penetrating the sleeve (2112) and threadedly connected to the sleeve (2112) wall is arranged on the sleeve wall; the locking bolt (2113) can be inserted into the modular hole (2121); when the railing (212) moves along the axial direction of the sleeve (2112), the modular holes (2121) on the railing (212) can be opposite to the locking bolts (2113) one by one and enable the locking bolts (2113) to be inserted into the modular hole (2121).

3. The safety protection structure of a prefabricated staircase in an assembled building according to claim 1, characterized in that: The angle between the sleeve (2112) and the insertion rod (2111) is adjustable.

4. The safety protection structure of a prefabricated staircase in an assembled building according to claim 3, characterized in that: The sleeve (2112) is rotatably connected to the insertion rod (2111) via the rotating shaft (3); a plurality of positioning holes (31) arranged along the circumferential direction of the rotating shaft (3) are provided on the side wall of the rotating shaft (3); a fixing block (4) is provided on the insertion rod (2111); a fixing piece perpendicular to the rotating shaft (3) is provided on the fixing block (4); the fixing piece is threadedly connected to the fixing block (4); when the rotating shaft (3) rotates, the positioning holes (31) on the rotating shaft (3) are opposite to the fixing piece one by one; when the fixing piece moves in the direction of the rotating shaft (3), the fixing piece can be inserted into the corresponding positioning hole (31).

5. The safety protection structure of a prefabricated staircase in an assembled building according to claim 1, characterized in that: The sleeve (2112) and the insertion rod (2111) are fixedly connected by welding.

6. The safety protection structure of a prefabricated staircase in an assembled building according to claim 1, characterized in that: A conical elastic sleeve (2114) is arranged on the outside of the insertion rod (2111), the small end of the elastic sleeve (2114) faces the bottom end of the insertion rod (2111), the small end of the elastic sleeve (2114) can be inserted into the inside of the reserved hole (15) along with the insertion rod (2111), and the area enclosed by the outer contour of the large end of the elastic sleeve (2114) is larger than the cross-sectional area of ​​the reserved hole (15).

7. The safety protection structure of a prefabricated staircase in an assembled building according to claim 1, characterized in that: The connecting column includes a body and a threaded rod arranged in sequence from bottom to top. The threaded rod is detachably connected to the body. A clamping plate is slidably connected to the threaded rod. A clamping sleeve is threadedly connected to the threaded rod. The clamping sleeve is located below the clamping rod.

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