Prefabricated stainless steel stair
The prefabricated design of the threaded connection and plug-in structure solves the problem of inconvenient maintenance caused by traditional stainless steel staircase welding, realizing a stainless steel staircase that is easy to install and safe to use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU XINQIBU STAIRCASE MFG CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-16
AI Technical Summary
Traditional stainless steel staircases are welded together as a single unit, making maintenance and replacement inconvenient.
The design adopts a modular approach, using threaded connections and plug-in structures to achieve detachable connections between the pedals and support frames. Combined with the hinged safety mechanism of the railing, it enables convenient maintenance and safe use.
It enables convenient installation and maintenance of stainless steel stairs, improves maintenance efficiency, and provides a safe environment for going up and down stairs.
Smart Images

Figure CN224363569U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stainless steel staircase technology, specifically to a prefabricated stainless steel staircase. Background Technology
[0002] Staircases are components in buildings that serve as vertical transportation links between floors, especially when there are significant differences in elevation. Even in multi-story and high-rise buildings where elevators or escalators are the primary means of vertical transportation, staircases must still be provided for escape in case of fire, despite the use of elevators as the main vertical transportation tool in high-rise buildings. Staircases consist of continuous flights of steps (also known as stair runs), landings (resting platforms), and balustrades.
[0003] Traditional stainless steel staircases are mostly installed by welding, making the staircase a whole. However, when one part is damaged, it is inconvenient to repair or replace it. Therefore, we urgently need a prefabricated stainless steel staircase. Utility Model Content
[0004] The purpose of this utility model is to provide a prefabricated stainless steel staircase to solve the problem mentioned in the background art that traditional stainless steel staircases are mostly installed by welding, making the staircase a whole, but when one part is damaged, it is inconvenient to repair or replace it.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a prefabricated stainless steel staircase, including treads, an installation mechanism is provided on the outside of the treads, and a protective mechanism is provided on the top of the treads;
[0006] The installation mechanism includes a first support frame and a second support frame. One end of the first support frame has a threaded groove, and a threaded rod is threadedly connected to the inner side of the threaded groove. One end of the threaded rod is fixedly connected to a support plate, and one end of the support plate is fixedly connected to a plug-in block. The bottom of both the first and second support frames is threadedly connected to support legs. One end of the second support frame has a groove, and a support block is engaged inside the groove. One end of both the support block and the second support frame has a fixing hole, and one end of the plug-in block is provided with a wedge-shaped block.
[0007] Preferably, multiple pedals are provided, and each of the multiple pedals has a locking groove in the middle, through which the pedal is engaged with the support plate.
[0008] Preferably, there are multiple threaded rods, and the multiple threaded rods are arranged in a linear array.
[0009] Preferably, one end of the support block is provided with a through groove, the position of which corresponds to the threaded groove.
[0010] Preferably, the protective mechanism includes a railing, with a mounting base fixedly connected to the bottom of the railing and a connecting rod hinged to the top of the railing.
[0011] Preferably, multiple railings are provided, and one end of the mounting base is threadedly connected to one end of the pedal.
[0012] Preferably, multiple connecting rods are provided, and each of the multiple connecting rods has a snap-fit block fixedly connected to its bottom.
[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0014] First, this utility model completes the installation of the first support frame by threading the support leg to the first support frame and then fixing the support leg to the ground with bolts. Next, the threaded rod at one end of the support plate is aligned with the threaded groove at one end of the first support frame, allowing the threaded rod to spiral into the groove, thus fixing the support plate to the first support frame. The above steps are then repeated for the other support plates, connecting them to the first support frame. Then, the engaging grooves in the middle of multiple pedals are aligned with the multiple support plates and inserted, causing the multiple pedals to engage with the multiple support plates, thus initially completing the installation of the pedals. Personnel can then use the pedals to go upstairs. Finally, the support block is inserted into the groove of the second support frame, and bolts are passed through the fixing holes on the outside of the support block and the second support frame to... The support block is fixed in the groove of the second support frame, and then the remaining support legs are threaded to the second support frame, so that the second support frame and the first support frame are at the same height. Then, the through groove on the outside of the support block is aligned with the plug-in block at one end of the support plate, so that the plug-in block is inserted into the inside of the support block. One end of the second support frame is fitted with one end of the tread. Then, the wedge block is inserted into the plug-in block, thus completing the installation of the stainless steel staircase. When a certain part needs to be replaced, simply remove the wedge block, then unscrew the bolt between the support block and the second support frame to release the support block from its fixation, and the part can be replaced as needed. This completes the assembly connection and installation of the various parts of the stainless steel staircase, thereby facilitating the maintenance of the stainless steel staircase.
[0015] Secondly, this utility model connects the mounting bases at the bottom of multiple railings with the top of the steps using threaded connections, so that two railings are installed on the top of each step. Then, starting from the top railing, the hinged connecting rod is flipped so that the snap-fit block at the bottom of the connecting rod snaps into the connecting groove at the top of the railing of the next layer, thus completing the connection between the two railings and forming a handrail. This makes it safer for people to go up and down the stainless steel stairs, thereby achieving a protective effect. Attached Figure Description
[0016] Figure 1 This is a perspective view of the entire utility model;
[0017] Figure 2 This is a three-dimensional disassembled view of the installation mechanism of this utility model;
[0018] Figure 3 This is a sectional view of the installation mechanism of this utility model;
[0019] Figure 4 This is a cross-sectional view of the protective mechanism of this utility model.
[0020] The components are: 1. Pedal; 2. Mounting mechanism; 3. Protective mechanism; 21. First support frame; 22. Threaded rod; 23. Support plate; 24. Insertion block; 25. Second support frame; 26. Support leg; 27. Support block; 28. Wedge block; 31. Railing; 32. Mounting seat; 33. Connecting rod; 34. Snap-fit block. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] This utility model provides the following technical solution:
[0023] Example 1
[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 A prefabricated stainless steel staircase includes a tread 1, an installation mechanism 2 on the outside of the tread 1, and a protective mechanism 3 on the top of the tread 1.
[0025] The mounting mechanism 2 includes a first support frame 21 and a second support frame 25. One end of the first support frame 21 has a threaded groove, and a threaded rod 22 is threadedly connected to the inside of the threaded groove. One end of the threaded rod 22 is fixedly connected to a support plate 23, and one end of the support plate 23 is fixedly connected to a plug-in block 24. The bottom of both the first support frame 21 and the second support frame 25 is threadedly connected to a support leg 26. One end of the second support frame 25 has a groove, and a support block 27 is engaged inside the groove. One end of both the support block 27 and the second support frame 25 has a fixing hole. One end of the plug-in block 24 is provided with a wedge block 28.
[0026] Multiple pedals 1 are provided, and each pedal 1 has a locking groove in the middle, through which the pedal 1 is engaged with the support plate 23.
[0027] Multiple threaded rods 22 are provided, and the multiple threaded rods 22 are arranged in a linear array.
[0028] One end of the support block 27 has a through groove, the position of which corresponds to the threaded groove.
[0029] Through the above technical solution, the support leg 26 is threadedly connected to the first support frame 21, and then the support leg 26 is fixed to the ground with bolts to complete the installation of the first support frame 21. Then, the threaded rod 22 at one end of the support plate 23 is aligned with the threaded groove at one end of the first support frame 21, so that the threaded rod 22 spirals into the inside of the threaded groove, thereby fixing the support plate 23 to the first support frame 21. Then, the above steps are repeated for the other support plates 23 to connect with the first support frame 21. Then, the engaging grooves in the middle of the multiple pedals 1 are aligned with the multiple support plates 23 and inserted into them, so that the multiple pedals 1 and the multiple support plates 23 engage, and the installation of the pedals 1 is initially completed. People can step on the pedals 1 to go upstairs. Then, the support block 27 is inserted into the groove of the second support frame 25, and then fixed by bolts passing through the support block 27 and the outside of the second support frame 25. The support block 27 is fixed in the groove of the second support frame 25 by drilling holes. Then, the remaining support leg 26 is threaded to the second support frame 25 so that the second support frame 25 and the first support frame 21 are at the same height. Then, the through groove on the outside of the support block 27 is aligned with the plug block 24 at one end of the support plate 23 so that the plug block 24 is inserted into the inside of the support block 27. One end of the second support frame 25 is attached to one end of the tread 1. Then, the wedge block 28 is inserted into the plug block 24, thus completing the installation of the stainless steel staircase. When a certain part needs to be replaced, simply remove the wedge block 28, then unscrew the bolt between the support block 27 and the second support frame 25 to release the fixation of the support block 27. The part can then be replaced as needed, thus completing the assembly connection and installation of various parts of the stainless steel staircase, achieving the effect of facilitating the maintenance of the stainless steel staircase.
[0030] Example 2
[0031] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 Furthermore, based on Embodiment 1, the protective mechanism 3 includes a railing 31, with a mounting base 32 fixedly connected to the bottom of the railing 31 and a connecting rod 33 hinged to the top of the railing 31.
[0032] Multiple railings 31 are provided, and one end of the mounting base 32 is threadedly connected to one end of the pedal 1.
[0033] Multiple connecting rods 33 are provided, and each connecting rod 33 has a snap-fit block 34 fixedly connected to its bottom.
[0034] Through the above technical solution, by connecting the mounting base 32 at the bottom of multiple railings 31 to the top of the step 1 with threads, two railings 31 are installed on the top of each step 1. Then, starting from the top railing 31, the hinged connecting rod 33 is flipped so that the snap-fit block 34 at the bottom of the connecting rod 33 snaps into the connecting groove at the top of the railing 31 of the next layer, completing the connection between the two railings 31 and forming a handrail. This makes it safe for people to go up and down the stainless steel stairs, thereby achieving the effect of protection.
[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A prefabricated stainless steel staircase, comprising treads (1), characterized in that: The pedal (1) is provided with an installation mechanism (2) on its exterior and a protective mechanism (3) on its top. The installation mechanism (2) includes a first support frame (21) and a second support frame (25). One end of the first support frame (21) is provided with a threaded groove, and a threaded rod (22) is threadedly connected to the inner side of the threaded groove. One end of the threaded rod (22) is fixedly connected to a support plate (23), and one end of the support plate (23) is fixedly connected to a plug-in block (24). The bottom of the first support frame (21) and the second support frame (25) are both threadedly connected to support legs (26). One end of the second support frame (25) is provided with a groove, and a support block (27) is engaged inside the groove. One end of the support block (27) and the second support frame (25) is provided with a fixing hole, and one end of the plug-in block (24) is provided with a wedge block (28).
2. The prefabricated stainless steel staircase according to claim 1, characterized in that: Multiple pedals (1) are provided, and each of the multiple pedals (1) has a locking groove in the middle, and the pedals (1) are engaged with the support plate (23) through the locking groove.
3. The prefabricated stainless steel staircase according to claim 1, characterized in that: Multiple threaded rods (22) are provided, and the multiple threaded rods (22) are arranged in a linear array.
4. A prefabricated stainless steel staircase according to claim 1, characterized in that: One end of the support block (27) is provided with a through groove, the position of which corresponds to the threaded groove.
5. A prefabricated stainless steel staircase according to claim 1, characterized in that: The protective mechanism (3) includes a railing (31), with a mounting base (32) fixedly connected to the bottom of the railing (31) and a connecting rod (33) hinged to the top of the railing (31).
6. A prefabricated stainless steel staircase according to claim 5, characterized in that: The railing (31) is provided in multiple ways, and one end of the mounting base (32) is threadedly connected to one end of the pedal (1).
7. A prefabricated stainless steel staircase according to claim 5, characterized in that: Multiple connecting rods (33) are provided, and each of the multiple connecting rods (33) has a snap-fit block (34) fixedly connected to its bottom.