Steel structure stair

Abstract

The application discloses a steel structure stair, and particularly relates to the technical field of building, which comprises a plurality of stair segments, the stair segments are sequentially connected together in a head-to-tail mode, each stair segment comprises two mutually parallel vertical rods, the vertical rods are rotationally connected with a plurality of mutually parallel and uniformly distributed adjustable steps, the inner cavity of the vertical rod is provided with a pressing plate with a linear sliding direction perpendicular to the rotating shaft of the adjustable step, the rotating shaft of each adjustable step is coaxially provided with two mutually meshing tooth rings at both ends, the two tooth rings at the same end of each adjustable step are fixedly connected with the pressing plate and the adjustable step respectively, the inner cavity of the vertical rod is provided with a plurality of springs for driving the pressing plate to move in a direction away from the mutually meshing tooth rings, the vertical rod is screw-connected with a plurality of extrusion bolts, and the extrusion bolts extend into the inner cavity of the vertical rod and abut against the pressing plate driven by the springs, the steel structure stair with different lengths and inclination angles can be installed according to the height difference between building platforms.

Description

Technical Field

[0001] This utility model belongs to the field of building technology, specifically relating to a steel structure staircase. Background Technology

[0002] Temporary steel-structured buildings, such as stages, are detachable structures assembled using lightweight, high-strength steel through modular design. Their advantages include quick installation, high flexibility, ability to withstand large loads, and good safety. These buildings are widely used for temporary events such as performances and exhibitions, and can be easily dismantled and reused after use, making them both economical and environmentally friendly.

[0003] After the temporary steel structure building is erected, stairs need to be installed between platforms of different heights to facilitate the movement of people up and down. However, the structure of temporary steel structures is diverse. Whether it is a single building or different buildings, stairs need to be installed between multiple platforms with different heights. Transporting and installing multiple stairs of different heights is quite inconvenient.

[0004] Therefore, a new type of steel structure staircase is needed. Utility Model Content

[0005] To address the aforementioned problems, this utility model discloses a steel structure staircase.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A steel structure staircase includes several staircase segments connected end-to-end, with adjustable connecting mechanisms at both ends. Each staircase segment includes two parallel uprights, which together rotatably connect to several parallel and evenly distributed adjustable treads. The uprights have a pressure plate whose linear sliding direction is perpendicular to the axis of rotation of the adjustable treads. Each adjustable tread has two interlocking toothed rings coaxially fitted at both ends of its axis of rotation, with evenly distributed annular interlocking teeth on the interlocking side of each ring. The two toothed rings at the same end of each adjustable tread are fixedly connected to the pressure plate and the adjustable tread, respectively. The uprights have several springs that push the pressure plate towards the separation direction of the interlocking toothed rings. The uprights are threaded with several clamping bolts that extend into the upright's inner cavity and abut against the pressure plate pushed by the springs.

[0008] As a preferred technical solution of this utility model, at any adjacent connection point of the staircase segments, one of the uprights extends into a plug rod, and the plug rod is inserted into the groove of the other upright. A fixing bolt passes through the through hole of the plug rod, and the fixing bolt is simultaneously threadedly connected to the upright.

[0009] As a preferred embodiment of this utility model, the adjustable pedal has a rounded triangular cross-section, and a counterweight bar parallel to the rotating shaft is embedded at the bottom of the adjustable pedal.

[0010] As a preferred embodiment of this utility model, the adjustable pedal has a honeycomb-shaped cavity inside.

[0011] As a preferred technical solution of this utility model, the end uprights of the steel structure staircase are equipped with an adjustable connecting mechanism. The adjustable connecting mechanism includes a fixed seat set at the end of the upright. The end of the fixed seat away from the upright is rotatably connected to a connecting plate. The connecting plate is threadedly connected with a pressing bolt that passes through the through hole of the fixed seat. The connecting plate is provided with a plurality of through holes for fixing.

[0012] As a preferred embodiment of this utility model, the fixing seat is inserted into the groove of the upright, and a fixing bolt passes through the through hole of the fixing seat inserted into the groove, and the fixing bolt is simultaneously threadedly connected to the upright.

[0013] As a preferred embodiment of this utility model, the upright extends directly from the fixing seat.

[0014] The beneficial effects of this utility model are as follows:

[0015] I. This application allows for the installation of steel structure staircases of different lengths and inclination angles according to the height difference between building platforms. The top and bottom of the steel structure staircases are equipped with adjustable connecting mechanisms to adapt to and fit fixed platforms with different angles to the steel structure staircases, thereby achieving effective fixation of the top and bottom of the steel structure staircases. This is safe, reliable, and suitable for installing steel structure staircases between platforms with different height differences.

[0016] Second, the adjustable step of this application can be rotated and adjusted according to the inclination angle of the steel structure staircase, so that the top surface of the adjustable step remains relatively horizontal after installation and fixing, which facilitates stable stepping by people when going up and down and ensures safety during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is an exploded view of the staircase sections in an embodiment of the present invention;

[0020] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged view of point B in the middle;

[0021] Figure 5 This is a sectional view of the staircase segments according to an embodiment of the present invention;

[0022] Figure 6 This is an embodiment of the present utility model. Figure 5 Enlarged view of point C in the middle;

[0023] Figure 7 This is an exploded view of the adjustable pedal, counterweight bar, and toothed ring in an embodiment of the present invention.

[0024] List of identifiers in attached diagrams:

[0025] 1. Insert rod; 2. Fixing bolt; 3. Upright pole; 4. Adjustable pedal; 5. Counterweight bar; 6. Gear ring; 7. Pressure plate; 8. Spring; 9. Press bolt; 10. Fixing seat; 11. Connecting plate; 12. Press bolt. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0027] Please see Figure 1-7 A steel structure staircase includes several staircase segments, which are sequentially connected end-to-end. Adjustable connection mechanisms are provided at both ends of the staircase. At any connection point between adjacent staircase segments, one upright 3 extends into a insert 1, which is inserted into a groove in the other upright 3. A fixing bolt 2 passes through the through hole of the insert 1 and is threadedly connected to the upright 3. The adjustable connection mechanisms are used for top and bottom fixation of the steel structure staircase during use and can be adjusted according to the inclination angle of the staircase to ensure a secure fit between the adjustable connection mechanism and the fixed position.

[0028] Each staircase segment includes two parallel uprights 3, which together rotatably connect to several parallel and evenly distributed adjustable treads 4. The inner cavity of each upright 3 contains a pressure plate 7 whose linear sliding direction is perpendicular to the rotation axis of the adjustable tread 4. Each adjustable tread 4 has two interlocking toothed rings 6 coaxially fitted at both ends of its rotation axis, with evenly distributed annular interlocking teeth on the interlocking side of each toothed ring 6. In the embodiment shown in the attached drawing, adjacent interlocking teeth in the toothed rings 6 are spaced one degree apart, ensuring that the minimum degree of adjustment for a single rotation of the adjustable tread 4 is two degrees. The two toothed rings 6 at the same end of each adjustable tread 4 are fixedly connected to the pressure plate 7 and the adjustable tread 4, respectively. The inner cavity of each upright 3 contains several springs 8 that push the pressure plate 7 towards the separation direction of the interlocking toothed rings 6. The upright 3 is threadedly connected to several clamping bolts 9, which extend into the inner cavity of the upright 3 and abut against the pressure plate 7 pushed by the springs 8. Loosening the clamping bolts 9 that press against the same pressure plate 7 causes the pressure plate 7 to move under the push of the spring 8, thus separating the several pairs of meshing toothed rings 6 between adjacent pressure plates 7. In the embodiment shown in the attached drawing, the rotating shaft of the adjustable pedal 4 passes through the pressure plate 7 (with a certain gap between them), and the pressure plate 7 does not affect the rotation of the rotating shaft of the adjustable pedal 4, nor does the rotating shaft of the adjustable pedal 4 affect the movement of the pressure plate 7. Similarly, a certain gap is provided between the toothed rings 6 fixed on the pressure plate 7 and the rotating shaft of the adjustable pedal 4.

[0029] The adjustable pedal 4 has a rounded triangular cross-section, and a counterweight 5 parallel to the pivot is embedded at the bottom of the adjustable pedal 4. The interior of the adjustable pedal 4 has a honeycomb-shaped cavity. This ensures that the center of gravity of the adjustable pedal 4 is below its own pivot. When the toothed rings 6 fixedly connected to both ends of the adjustable pedal 4 disengage from the adjacent toothed rings 6, striking the upright 3 will cause the adjustable pedal 4 to rotate automatically, keeping the top surface relatively horizontal for easy stepping.

[0030] An adjustable connecting mechanism is installed on the end post 3 of the steel structure staircase. This mechanism includes a fixed seat 10 at the end of the post 3. A connecting plate 11 is rotatably connected to the end of the fixed seat 10 away from the post 3. A press-fit bolt 12, threaded through a through hole in the fixed seat 10, is threaded onto the connecting plate 11. The connecting plate 11 has several through holes for fixing, allowing bolts to pass through and securely connect to the platform. The bolts passing through the connecting plate 11 can be either ordinary studs or expansion bolts.

[0031] In Example 1, the fixing seat 10 is inserted into the groove of the upright 3, and a fixing bolt 2 passes through the through hole of the fixing seat 10 inserted into the groove, and the fixing bolt 2 is also threadedly connected to the upright 3. In this example, the adjustable connection mechanism is detachable.

[0032] In Example 2, the upright 3 extends directly from the fixed base 10. In this example, the adjustable connection mechanism is non-removable.

[0033] Working principle:

[0034] Before use, measure the building to obtain the required length and inclination angle of the steel structure staircase. Then, tilt the individual staircase segments to the required angle. Next, completely loosen all the clamping bolts 9 of the individual staircase segments. Under the push of the spring 8, the pressure plate 7 moves, and the adjacent pressure plates 7 and several pairs of meshing toothed rings 6 separate. Then, tap the two uprights 3. The adjustable pedal 4 will rotate so that its top surface remains relatively horizontal, making it easy for people to step on. Finally, tighten the clamping bolts 9 on both sides of the individual staircase segments so that the several pairs of toothed rings 6 on both sides of the individual staircase segments re-engage, and the adjustable pedal 4 cannot rotate.

[0035] When tightening or loosening the clamping bolts 9 on one side of a single stair section, each round of operation should involve tightening all clamping bolts 9 in small increments, and multiple rounds of fine-tuning should be performed before the clamping bolts 9 can be fully tightened or loosened. During the tightening of the clamping bolts 9, the pressure plate 7 undergoes a small amount of elastic deformation.

[0036] In use, several stair sections are connected together using insert rods 1 and fixing bolts 2 to form a steel structure staircase of the required length. Then, the steel structure staircase is hoisted to a suitable inclined installation position. Next, all the clamping bolts 12 of the adjustable connection mechanism are loosened, so that the fixing seat 10 and the connecting plate 11 can rotate relative to each other, so that the connecting plate 11 fits against the platform to be fixed. Finally, bolts are used to pass through the through holes of the connecting plate 11 and fix it to the platform, so that the top and bottom of the steel structure staircase are effectively fixed.

[0037] It should be noted that the above content merely illustrates the technical concept of this utility model and cannot be used to limit the scope of protection of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. A steel structure staircase, comprising several staircase sections, characterized in that, Several staircase segments are sequentially connected end to end, and each end of the staircase is provided with an adjustable connecting mechanism; each staircase segment includes two parallel uprights (3), and the two uprights (3) are rotatably connected to several parallel and evenly distributed adjustable treads (4). The inner cavity of each upright (3) is provided with a pressure plate (7) whose linear sliding direction is perpendicular to the rotation axis of the adjustable tread (4). Each adjustable tread (4) has two interlocking toothed rings (6) coaxially fitted at both ends of its rotation axis. Each toothed ring (6) has a ring-shaped uniformly distributed biting teeth on its biting side. The two toothed rings (6) at the same end of each adjustable pedal (4) are fixedly connected to the pressure plate (7) and the adjustable pedal (4) respectively. The inner cavity of the upright (3) is provided with several springs (8) that push the pressure plate (7) to move in the direction of separation of the biting toothed rings (6). The upright (3) is threaded with several extrusion bolts (9), and the extrusion bolts (9) extend into the inner cavity of the upright (3) and abut against the pressure plate (7) pushed by the springs (8).

2. A steel structure staircase according to claim 1, characterized in that, At any adjacent connection of the staircase segments, one of the uprights (3) extends into a plug (1), and the plug (1) is inserted into the groove of the other upright (3) that is connected. A fixing bolt (2) passes through the through hole of the plug (1), and the fixing bolt (2) is simultaneously threadedly connected to the upright (3).

3. A steel structure staircase according to claim 1, characterized in that, The adjustable pedal (4) has a rounded triangle cross-section, and a counterweight (5) parallel to the pivot is embedded at the bottom of the adjustable pedal (4).

4. A steel structure staircase according to claim 3, characterized in that, The adjustable pedal (4) has a honeycomb cavity inside.

5. A steel structure staircase according to claim 1, characterized in that, The end post (3) of the steel structure staircase is equipped with an adjustable connection mechanism. The adjustable connection mechanism includes a fixed seat (10) set at the end of the post (3). The end of the fixed seat (10) away from the post (3) is rotatably connected to a connecting plate (11). The connecting plate (11) is threadedly connected to a pressing bolt (12) that passes through the through hole of the fixed seat (10). The connecting plate (11) is provided with several through holes for fixing.

6. A steel structure staircase according to claim 5, characterized in that, The fixing seat (10) is inserted into the groove of the upright (3), and a fixing bolt (2) passes through the through hole of the fixing seat (10) inserted into the groove, and the fixing bolt (2) is simultaneously threadedly connected to the upright (3).

7. A steel structure staircase according to claim 5, characterized in that, The upright (3) extends directly out of the fixing seat (10).

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