Height adjusting device of prefabricated steel stair

Abstract

The utility model relates to the technical field of prefabricated steel stairs, in particular to a height adjusting device of a prefabricated steel stair, which can adjust the angle of the stair and the height of a pedal according to actual conditions and improve the practicability. Comprising two main beams and a plurality of pedal assemblies installed on the two main beams, L-shaped connecting bases are rotationally connected to the two ends of the two main beams correspondingly, transverse plates are fixedly connected between the two L-shaped connecting bases on the lower side and between the two L-shaped connecting bases on the upper side correspondingly, and T-shaped sliding blocks are fixedly arranged at the top ends of two positioning inserting plates correspondingly; the two sets of positioning inserting plates are symmetrically installed on the L-shaped pedal in a sliding mode through matching of the T-shaped sliding blocks and the T-shaped sliding grooves, the middle of the two-way threaded rod is fixedly sleeved with a screwing sleeve, the two-way threaded rod is symmetrically sleeved with two sets of threaded sleeves in a screwed mode, and the outer side ends of the two sets of threaded sleeves are fixedly connected with the inner sides of the two sets of positioning inserting plates respectively. And the L-shaped pedal is mounted on the two groups of main beams through the matching of the positioning insertion plates and the positioning notches.

Description

Technical Field

[0001] This utility model relates to the technical field of precast steel stairs, and in particular to a height adjustment device for precast steel stairs. Background Technology

[0002] With the continuous development of prefabricated buildings, precast components, as a new type of building material, are receiving increasing attention and favor. Among precast components, precast steel staircases, as a high-quality product with stable structure, convenient construction, and long service life, are widely used in various prefabricated buildings. The application of precast steel staircases can not only improve construction efficiency and reduce costs, but also meet the design requirements of different buildings, providing people with more comfortable, beautiful, and safe spaces.

[0003] Existing precast steel stair treads are all fixedly connected and have a relatively simple structure. However, this has certain drawbacks in use, as the angle of the stairs and the height of the treads cannot be adjusted according to actual conditions, resulting in insufficient practicality. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a height adjustment device for prefabricated steel stairs that can adjust the angle of the stairs and the height of the treads according to the actual situation, thereby improving the practicality.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a height adjustment device for a precast steel staircase, comprising two main beams and multiple tread assemblies mounted on the two main beams. Both ends of the two main beams are rotatably connected to L-shaped connecting seats. Horizontal plates are fixedly connected between the two lower sets of L-shaped connecting seats and between the two upper sets of L-shaped connecting seats. Multiple positioning slots are equidistantly provided on both main beams. Multiple tread assemblies are installed between the two main beams through the cooperation of the positioning slots. Each tread assembly includes L-shaped treads and double... The L-shaped pedal has two sets of T-shaped grooves symmetrically opened on the top of the inner side of the threaded rod and two sets of positioning plates. T-shaped sliders are fixedly installed on the top of the two sets of positioning plates. The two sets of positioning plates are symmetrically slidably installed on the L-shaped pedal through the cooperation of the T-shaped sliders and T-shaped grooves. A screw sleeve is fixedly sleeved in the middle of the double-threaded rod. Two sets of threaded sleeves are symmetrically screwed on the double-threaded rod. The outer ends of the two sets of threaded sleeves are fixedly connected to the inner side of the two sets of positioning plates respectively. The L-shaped pedal is installed on the two sets of main beams through the cooperation of the positioning plates and positioning grooves.

[0007] Preferably, two sets of screw plates are symmetrically fixed on the outer wall of the screw sleeve.

[0008] Preferably, each of the multiple sets of positioning inserts has a limiting plate integrally fixed on the inner side of its bottom end.

[0009] Preferably, anti-slip rubber strips are fixedly connected to the outer corners of the multiple sets of L-shaped pedals.

[0010] Preferably, all four sets of L-shaped connectors are fixedly connected to a fastening rubber pad on their outer side.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: During installation, the overall installation angle can be adjusted by rotating the L-shaped connecting seats at both ends of the main beam according to the actual distance between the two ends of the installation position. The L-shaped connecting seats are then fixed in place by bolts. When the installation distance is large, the tilt angle of the main beam can be reduced; when the distance is small, the tilt angle of the main beam can be increased. Then, the height of the L-shaped pedal can be adjusted as needed. During adjustment, the double-threaded rod is rotated counterclockwise by tightening the sleeve, causing the double-threaded rod to pull the positioning plate along the threaded sleeve. Slide the T-shaped slide inward to pull the positioning plate out of the positioning slot. Then, remove the L-shaped tread. After removing the L-shaped tread, move it to the appropriate height and align the positioning plate with the corresponding positioning slot. Then, rotate the double-threaded rod clockwise through the screw sleeve to push the positioning plate outward along the T-shaped slide, inserting it into the corresponding positioning slot. This allows the L-shaped tread to be installed at the appropriate height, thus enabling adjustment of the staircase angle and tread height according to actual conditions, improving practicality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0013] Figure 2 This is a partial isometric view of the bottom structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the bottom isometric structure of the pedal assembly in this utility model;

[0015] Figure 4 This is a partial isometric structural diagram of the pedal assembly in this utility model;

[0016] Figure 5 This is a schematic diagram of the bottom isometric structure of the L-shaped pedal in this utility model;

[0017] The following are labels in the attached diagram: 1. Main beam; 2. L-shaped connecting seat; 3. Horizontal plate; 4. Positioning groove; 5. L-shaped pedal; 6. T-shaped slide; 7. Positioning insert plate; 8. T-shaped slider; 9. Threaded sleeve; 10. Two-way threaded rod; 11. Tightening sleeve; 12. Tightening plate; 13. Limiting plate; 14. Anti-slip rubber strip; 15. Fastening rubber pad. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] Example

[0020] Please see Figures 1-5 This utility model discloses a height adjustment device for a precast steel staircase, comprising two main beams 1. Both ends of the two main beams 1 are rotatably connected to L-shaped connecting seats 2. Horizontal plates 3 are fixedly connected between the two lower sets of L-shaped connecting seats 2 and between the two upper sets of L-shaped connecting seats 2. Multiple positioning slots 4 are equidistantly provided on both main beams 1. Multiple tread assemblies are installed between the two main beams 1 through the cooperation of the positioning slots 4. Each tread assembly includes an L-shaped tread 5, a bidirectional threaded rod 10, and two sets of positioning inserts 7. Two sets of symmetrically arranged plates are provided on the inner top of the L-shaped tread 5. The T-shaped slide 6 has two sets of positioning plates 7, each with a T-shaped slider 8 fixed at its top. The two sets of positioning plates 7 are symmetrically slidably mounted on the L-shaped pedal 5 through the cooperation of the T-shaped slider 8 and the T-shaped slide 6. A screw sleeve 11 is fixedly fitted in the middle of the double-threaded rod 10. Two sets of threaded sleeves 9 are symmetrically screwed onto the double-threaded rod 10. The outer ends of the two sets of threaded sleeves 9 are fixedly connected to the inner sides of the two sets of positioning plates 7, respectively. The L-shaped pedal 5 is mounted on the two sets of main beams 1 through the cooperation of the positioning plates 7 and the positioning slots 4. During use and installation, the distance between the two ends of the installation position can be adjusted according to the actual distance between the two ends. In practice, the overall installation angle is adjusted by rotating the L-shaped connecting seats 2 at both ends of the main beam 1. The L-shaped connecting seats 2 are then fixed in place using bolts. When the installation distance is large, the tilt angle of the main beam 1 can be reduced; when the distance is small, the tilt angle of the main beam 1 can be increased. Then, the height of the L-shaped pedal 5 is adjusted as needed. During adjustment, the double-threaded rod 10 is rotated counterclockwise by the screw sleeve 11, causing the double-threaded rod 10 to pull the positioning insert 7 along the T-shaped slide groove 6 inward through the threaded sleeve 9, so that the positioning insert 7 moves out of the positioning groove. Pull out 4, and then remove the L-shaped tread 5. After removing the L-shaped tread 5, move it to an appropriate height and align the positioning plate 7 with the corresponding positioning slot 4. Then, rotate the double-threaded rod 10 clockwise through the screw sleeve 11, so that the double-threaded rod 10 pushes the positioning plate 7 outward along the T-shaped slide groove 6 through the threaded sleeve 9, so that the positioning plate 7 is inserted into the corresponding positioning slot 4, and the L-shaped tread 5 is installed at an appropriate height. This allows the angle of the stairs and the height of the treads to be adjusted according to the actual situation, improving practicality.

[0021] Two sets of screw plates 12 are symmetrically fixed on the outer wall of the screw sleeve 11; by setting the screw plates 12, it is more labor-saving and convenient to rotate the bidirectional threaded rod 10 through the screw sleeve 11.

[0022] Each of the multiple positioning inserts 7 has a limiting plate 13 integrally fixed on the inner side of its bottom end. By setting the limiting plate 13, when the positioning insert 7 is inserted into the positioning slot 4, the limiting plate 13 is exactly against the inner side of the main beam 1. The limiting plate 13 limits the positioning insert 7 and prevents the positioning insert 7 from disengaging from the L-shaped pedal 5 when it slides outward.

[0023] Anti-slip strips 14 are fixedly connected to the outer corners of the multiple sets of L-shaped treads 5; by setting anti-slip strips 14, the slipping of the feet is effectively prevented when going up and down the stairs by using L-shaped treads 5.

[0024] All four sets of L-shaped connectors 2 are fixedly connected to the outer side with fastening pads 15; by setting fastening pads 15, the L-shaped connectors 2 can be installed more tightly and securely.

[0025] This utility model discloses a height adjustment device for a precast steel staircase. During installation, the overall installation angle is adjusted by rotating the L-shaped connecting seats 2 at both ends of the main beam 1, based on the actual distance between the two ends of the installation location. The L-shaped connecting seats 2 are then fixed in place using bolts. When the installation distance is large, the tilt angle of the main beam 1 can be reduced; when the distance is small, the tilt angle can be increased. Then, the height of the L-shaped tread 5 is adjusted as needed. During adjustment, the bidirectional threaded rod 10 is rotated counterclockwise by the screw sleeve 11, causing the bidirectional thread... Rod 10 pulls the positioning plate 7 along the T-shaped slide groove 6 inward through the threaded sleeve 9, so that the positioning plate 7 is pulled out from the positioning slot 4. Then the L-shaped pedal 5 can be removed. After the L-shaped pedal 5 is removed, it is moved to an appropriate height and the positioning plate 7 is aligned with the positioning slot 4 at the corresponding position. Then, the double-threaded rod 10 is rotated clockwise through the screw sleeve 11, so that the double-threaded rod 10 pushes the positioning plate 7 along the T-shaped slide groove 6 outward through the threaded sleeve 9, so that the positioning plate 7 is inserted into the positioning slot 4 at the corresponding position, and the L-shaped pedal 5 is installed at the appropriate height.

[0026] The height adjustment device for a prefabricated steel staircase of this utility model can be installed, connected or set in a common mechanical way, and can be implemented as long as it can achieve its beneficial effect.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A height adjustment device for a prefabricated steel staircase, characterized in that, It includes two main beams (1) and multiple pedal assemblies mounted on the two main beams (1); Two main beams (1), both ends of the two main beams (1) are rotatably connected with L-shaped connecting seats (2), and cross plates (3) are fixedly connected between the two sets of L-shaped connecting seats (2) on the lower side and between the two sets of L-shaped connecting seats (2) on the upper side. Multiple positioning slots (4) are equally spaced on the two main beams (1), and multiple pedal assemblies are installed between the two main beams (1) through the cooperation of the positioning slots (4). The pedal assembly includes an L-shaped pedal (5), a bidirectional threaded rod (10), and two sets of positioning plates (7). The L-shaped pedal (5) has two sets of T-shaped grooves (6) symmetrically opened on the top of its inner side. The top of each of the two sets of positioning plates (7) is fixedly provided with a T-shaped slider (8). The two sets of positioning plates (7) are symmetrically slidably installed on the L-shaped pedal (5) through the cooperation of the T-shaped slider (8) and the T-shaped groove (6). The bidirectional threaded rod (10) is fixedly fitted with a screw sleeve (11) in the middle. The bidirectional threaded rod (10) is symmetrically screwed with two sets of threaded sleeves (9). The outer ends of the two sets of threaded sleeves (9) are respectively fixedly connected to the inner side of the two sets of positioning plates (7). The L-shaped pedal (5) is installed on the two sets of main beams (1) through the cooperation of the positioning plates (7) and the positioning slots (4).

2. The height adjustment device for a precast steel staircase as described in claim 1, characterized in that, Two sets of screw plates (12) are symmetrically fixed on the outer wall of the screw sleeve (11).

3. The height adjustment device for a precast steel staircase as described in claim 2, characterized in that, Each of the multiple positioning plates (7) has a fixed limiting plate (13) integrally fixed on the inner side of its bottom end.

4. The height adjustment device for a precast steel staircase as described in claim 3, characterized in that, Anti-slip rubber strips (14) are fixedly connected to the outer corners of the multiple sets of L-shaped pedals (5).

5. The height adjustment device for a precast steel staircase as described in claim 4, characterized in that, All four sets of L-shaped connectors (2) have fastening pads (15) fixedly connected to their outer sides.

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