A sectional single-tread staircase

Abstract

The present invention discloses a sectional single-tread staircase, comprising an upper staircase, a lower staircase and a ladder beam for connecting and supporting the upper staircase and the lower staircase, wherein the upper staircase and the lower staircase both comprise a ladder plate and a plurality of steps arranged on the pedal, wherein the ladder plate comprises a first connecting portion at the upper end and a second connecting portion at the lower end, wherein a horizontally arranged supporting surface is provided on the ladder beam, wherein the second connecting portion of the upper staircase and the first connecting portion of the lower staircase are both supported on the supporting surface and butted against each other, and wherein a positioning mechanism for preventing the first connecting portion of the lower staircase from moving along the supporting surface is provided on the ladder beam. The present invention adopts horizontal segmentation, has good installation stability, is convenient for transportation and installation, reduces on-site construction risks, and improves construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of construction, in particular to a sectional single-tread staircase. Background Art

[0002] Prefabricated stairs solve the defects of traditional cast-in-place stairs, such as difficult construction, long construction period, and great safety hazards. They can be effectively used in both cast-in-place structures and prefabricated buildings. However, due to the complex structure of the stairs, prefabricated stairs are also one of the components with the heaviest self-weight in prefabricated buildings. Large-scale transportation equipment and large-tonnage lifting equipment are required, which not only increases the construction cost, but also increases the construction risk on site. In order to reduce the self-weight of the staircase structure, it is usually adopted to divide the stairs into sections. Among them, the horizontal segmentation method of setting the ladder beams and ladder columns is the most effective and reliable. However, most of the current horizontal segmentation schemes have the problem of inconsistent structures of the upper and lower stair sections after the staircase is segmented. The complex structure of the cast-in-place ladder beam is not conducive to on-site formwork and pouring, and the connection setting of the upper and lower stair sections needs to be improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a sectional single-tread staircase which adopts transverse segmentation, has good installation stability, is easy to transport and install, reduces on-site construction risks, and improves construction efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A sectional single-tread staircase comprises an upper staircase, a lower staircase and a ladder beam for connecting and supporting the upper staircase and the lower staircase, wherein the upper staircase and the lower staircase each comprise a stair tread and a plurality of steps arranged on the stair tread, the stair tread comprising a first connecting portion located at an upper end and a second connecting portion located at a lower end, a horizontally arranged supporting surface is provided on the ladder beam, the second connecting portion of the upper staircase and the first connecting portion of the lower staircase are both supported on the supporting surface and abut against each other, and a positioning mechanism is provided on the ladder beam for preventing the first connecting portion of the lower staircase from moving along the supporting surface.

[0006] As a further improvement of the above technical solution:

[0007] The positioning mechanism includes an embedded connector embedded in the ladder beam and extending upward from the supporting surface. The first connecting portion of the lower ladder section is provided with a vertically penetrating connecting hole, and the embedded connector is inserted into the connecting hole.

[0008] An annular gap is provided between the inner wall of the connection hole and the embedded connection piece, and the annular gap is filled with a first cement mortar filling layer.

[0009] A second cement mortar filling layer is filled between the first connecting portion of the lower stair section and the supporting surface.

[0010] A polystyrene filling layer is provided between the second connection part of the upper step section and the first connection part of the lower step section, and a polyethylene rod is buried in the polystyrene filling layer. One end of the polyethylene rod abuts against the second connection part of the upper step section, and the other end abuts against the first connection part of the lower step section.

[0011] The first connecting portion includes a tread panel and a riser panel arranged perpendicular to the tread panel, and the tread panel in the lower stair section is supported on the support surface and in surface contact with the support surface.

[0012] The second connecting portion includes a supporting portion arranged along the vertical direction, the supporting portion is provided with a horizontal bottom surface and a vertical surface arranged perpendicular to the horizontal bottom surface, the horizontal bottom surface in the upper stair section is supported on the supporting surface and in surface contact with the supporting surface, and the vertical surface in the upper stair section is abutted against the first connecting portion of the lower stair section.

[0013] The upper stair section and the lower stair section have the same structure and size.

[0014] The second connection part is provided with a sliding hinge support for installing the second connection part on the structural foundation, the second connection part of the upper stair section is connected to the supporting surface through the sliding hinge support, and the second connection part of the lower stair section is connected to the lower floor through the sliding hinge support.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The upper and lower steps of the sectional single-tread staircase of the present invention can be prefabricated before installation, which can reduce wet work on site, simplify the stair construction process, improve the stair construction efficiency, and solve the defects of traditional cast-in-place staircases such as difficult construction and long construction period. During the construction process, there is no need to use large-scale transportation equipment and large-scale lifting equipment, which not only reduces the construction cost but also reduces the construction risk on site, effectively improving the construction efficiency. The ladder beam is provided with a horizontally arranged supporting surface, and the structural form is simple, which is convenient for on-site formwork casting and curing and forming; the ladder beam is used to connect and support the upper and lower steps, and the upper step The upper and lower stair sections each include a first connection portion located at an upper end and a second connection portion located at a lower end, the second connection portion of the upper stair section and the first connection portion of the lower stair section are both supported on a supporting surface and abut against each other, and the ladder beam serves as a support for the upper and lower stair sections at the same time, having the advantages of simple structure and easy assembly, a positioning mechanism for preventing the first connection portion of the lower stair section from moving along the supporting surface is provided on the ladder beam, and after the first connection portion of the lower stair section is installed and positioned on the ladder beam, it can prevent the second connection portion of the upper stair section from moving along the supporting surface, so that the upper and lower stair sections meet the installation and fixing requirements of the prefabricated stairs, and have good installation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the upper section of a sectional single-tread staircase.

[0018] Figure 2 This is a schematic diagram of the overhead structure of the upper flight of a sectional single-tread staircase.

[0019] Figure 3 This is a partial main structural diagram of a sectional single-tread staircase.

[0020] Legend:

[0021] 1. Upper stair section; 2. Lower stair section; 3. Stair beam; 31. Support surface; 32. Embedded connector; 4. Stair board; 5. Step; 6. First connection part; 61. Tread panel; 62. Riser panel; 7. Second connection part; 71. Horizontal bottom surface; 72. Vertical surface; 8. Polystyrene filling layer. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 3As shown, the sectional single-tread staircase of this embodiment comprises an upper stair section 1, a lower stair section 2 and a ladder beam 3 for connecting and supporting the upper stair section 1 and the lower stair section 2. The upper stair section 1 and the lower stair section 2 both comprise a stair tread 4 and a plurality of steps 5 arranged on the stair tread 4. The stair tread 4 comprises a first connecting portion 6 located at the upper end and a second connecting portion 7 located at the lower end. A horizontally arranged supporting surface 31 is provided on the ladder beam 3. The second connecting portion 7 of the upper stair section 1 and the first connecting portion 6 of the lower stair section 2 are both supported on the supporting surface 31 and abut against each other. A positioning mechanism is provided on the ladder beam 3 for preventing the first connecting portion 6 of the lower stair section 2 from moving along the supporting surface 31. The upper stair section 1 and the lower stair section 2 of the sectional single-tread staircase can be prefabricated before installation, which can reduce wet work on site, simplify the stair construction process, improve the stair construction efficiency, and solve the defects of traditional cast-in-place staircases such as difficult construction and long construction period. During the construction process, there is no need to use large-scale transportation equipment and large-scale lifting equipment, which not only reduces the construction cost but also reduces the construction risk on site, effectively improving the construction efficiency. The ladder beam 3 is provided with a horizontally arranged supporting surface 31, and the structural form is simple, which is convenient for on-site formwork casting and curing and forming; the ladder beam 3 is used to connect and support the upper stair section 1 and the lower stair section 2, and the upper stair section 1 and the lower stair section 2 both include a support surface 31 located at The first connection part 6 at the upper end and the second connection part 7 at the lower end, the second connection part 7 of the upper stair section 1 and the first connection part 6 of the lower stair section 2 are all supported on the support surface 31 and abut against each other. The ladder beam 3 serves as a support for the upper stair section 1 and the lower stair section 2 at the same time, and has the advantages of simple structure and easy assembly. A positioning mechanism is provided on the ladder beam 3 for preventing the first connection part 6 of the lower stair section 2 from moving along the support surface 31. After the first connection part 6 of the lower stair section 2 is installed and positioned on the ladder beam 3, it can prevent the second connection part 7 of the upper stair section 1 from moving along the support surface 31, so that the upper stair section 1 and the lower stair section 2 meet the installation and fixation requirements of the prefabricated stairs, and the installation stability is good.

[0024] Preferably, the ladder beam 3 of this embodiment is a rectangular cast-in-place ladder beam.

[0025] like Figure 2As shown, preferably, the positioning mechanism includes an embedded connector 32 embedded in the ladder beam 3 and extending upward from the supporting surface 31, and the first connecting portion 6 of the lower ladder section 2 is provided with a vertically penetrating connecting hole, and the embedded connector 32 is inserted into the connecting hole. In this embodiment, the positioning mechanism adopts the form of the embedded connector 32 being inserted into the connecting hole, the embedded connector 32 is embedded in the ladder beam 3 and extends upward from the supporting surface 31, and the connecting hole is set on the first connecting portion 6 of the lower ladder section 2. In the actual construction process, a special lifting ring is used to connect the embedded hanging nails in the lower ladder section 2 firmly, and a tower crane is used for lifting, and the first connecting portion 6 of the lower ladder section 2 is lifted to the ladder beam 3. The staff uses a crowbar to fine-tune and correct so that the connecting hole is aligned with the embedded connector 32, and the lower ladder section 2 is slowly lowered into place to ensure that the embedded connector 32 is inserted into the connecting hole, and the first connecting portion 6 of the lower ladder section 2 and the ladder beam 3 are positioned and installed. The positioning mechanism has the advantages of simple structure, simple adjustment, easy assembly, good connection stability, and low manufacturing cost.

[0026] Preferably, there is an annular gap between the inner wall of the connection hole and the embedded connection piece 32, and the annular gap is filled with a first cement mortar filling layer. In this embodiment, in order to facilitate the installation of the embedded connection piece 32 and the connection hole, the diameter of the connection hole is larger than the diameter of the embedded connection piece 32. After the embedded connection piece 32 is inserted into the connection hole, an annular gap is formed between the inner wall of the connection hole and the embedded connection piece 32. The first cement mortar filling layer is filled in the annular gap. On the one hand, it can fill the gap to make the surface of the first connection part 6 of the lower stair section 2 smooth and beautiful. On the other hand, it can prevent the first connection part 6 of the lower stair section 2 from moving within the range of the connection hole, further improving the positioning effect.

[0027] Preferably, a second cement mortar filling layer is filled between the first connection portion 6 of the lower stair section 2 and the support surface 31. In this embodiment, by filling the second cement mortar filling layer between the first connection portion 6 of the lower stair section 2 and the support surface 31, the connection strength between the first connection portion 6 of the lower stair section 2 and the ladder beam 3 can be improved.

[0028] Preferably, a polystyrene filling layer 8 is provided between the second connection portion 7 of the upper stair section 1 and the first connection portion 6 of the lower stair section 2, and a polyethylene rod (not shown in the figure) is embedded in the polystyrene filling layer 8, one end of the polyethylene rod abuts against the second connection portion 7 of the upper stair section 1, and the other end abuts against the first connection portion 6 of the lower stair section 2. A good seal and elastic buffering effect are formed between the upper stair section 1 and the lower stair section 2 to avoid rigid contact between the two.

[0029] Preferably, the first connection part 6 includes a tread panel 61 and a riser panel 62 arranged perpendicular to the tread panel 61, and the tread panel 61 in the lower stair section 2 is supported on the support surface 31 and in surface contact with the support surface 31. In this embodiment, the first connection part 6 is provided with the tread panel 61 and the riser panel 62, so that the transition between the upper end of the ladder board 4 and the step 5 is smooth and the structure is simple. At the same time, the tread panel 61 in the lower stair section 2 is supported on the support surface 31 and in surface contact with the support surface 31, which facilitates the overlap connection between the first connection part 6 of the lower stair section 2 and the ladder beam 3, and has the advantages of simple structure, easy assembly, and good installation stability. In this embodiment, the step 5 includes a tread and a riser arranged perpendicular to the tread, and the riser panel 62 is arranged perpendicular to the tread.

[0030] Preferably, the second connection part 7 includes a support part arranged in the vertical direction, the support part is provided with a horizontal bottom surface 71 and a vertical surface 72 arranged perpendicular to the horizontal bottom surface 71, the horizontal bottom surface 71 in the upper stair section 1 is supported on the support surface 31 and in surface contact with the support surface 31, and the vertical surface 72 in the upper stair section 1 is butted against the first connection part 6 of the lower stair section 2. In this embodiment, the second connection part 7 includes a support column, the support column is provided with a horizontal bottom surface 71 and a vertical surface 72, after the second connection part 7 of the upper stair section 1 and the first connection part 6 of the lower stair section 2 are butted against, the vertical surface 72 and the top surface of the tread panel 61 of the lower stair section 2 form the same structural form as the step 5, so that the transition between the second connection part 7 of the upper stair section 1 and the first connection part 6 of the lower stair section 2 is smooth and the structural form is simple, with the advantages of simple structure, easy assembly, and good installation stability.

[0031] Preferably, the upper stair section 1 and the lower stair section 2 have the same structure and size. In this embodiment, the upper stair section 1 and the lower stair section 2 have the same structure and size, which not only facilitates mass production and reduces construction costs, but also enables the stairs to achieve an effective weight reduction of 50% for a single component, further improving construction efficiency.

[0032] Preferably, the second connection part 7 is provided with a sliding hinge support for installing the second connection part 7 on the structural foundation. The second connection part 7 of the upper stair section 1 is connected to the support surface 31 through the sliding hinge support, and the second connection part 7 of the lower stair section 2 is connected to the lower floor through the sliding hinge support. In this embodiment, the second connection part 7 is installed on the structural foundation through the sliding hinge support, the purpose of which is to enable the stair section to produce a certain displacement under the action of earthquake shear force, eliminate the influence of the prefabricated scissors stairs on the force and rigidity of the main structure under the action of earthquake, and improve the earthquake resistance. In this embodiment, the sliding hinge support is a sliding support of polytetrafluoroethylene plate, which has the advantages of simple structure, strong adaptability, large bearing capacity, long service life, low price, etc. In other embodiments, the sliding hinge support can also use other forms of sliding hinge supports.

[0033] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and changes obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sectional single-tread staircase, comprising an upper staircase (1), a lower staircase (2), and a ladder beam (3) for connecting and supporting the upper staircase (1) and the lower staircase (2), characterized in that: The upper stair section (1) and the lower stair section (2) both comprise a stair tread (4) and a plurality of steps (5) arranged on the stair tread (4); the stair tread (4) comprises a first connecting portion (6) located at an upper end and a second connecting portion (7) located at a lower end; a horizontally arranged supporting surface (31) is provided on the stair beam (3); the second connecting portion (7) of the upper stair section (1) and the first connecting portion (6) of the lower stair section (2) are both supported on the supporting surface (31) and butted against each other; and a positioning mechanism is provided on the stair beam (3) for preventing the first connecting portion (6) of the lower stair section (2) from moving along the supporting surface (31); The positioning mechanism comprises an embedded connecting piece (32) embedded in the ladder beam (3) and extending upward from the supporting surface (31); the first connecting portion (6) of the lower ladder section (2) is provided with a vertically penetrating connecting hole, and the embedded connecting piece (32) is inserted into the connecting hole; the upper ladder section (1) and the lower ladder section (2) have the same structure and size.

2. The sectional single-tread staircase according to claim 1, characterized in that: An annular gap is provided between the inner wall of the connection hole and the embedded connection piece (32), and the annular gap is filled with a first cement mortar filling layer.

3. The sectional single-tread staircase according to claim 1, characterized in that: A second cement mortar filling layer is filled between the first connecting portion (6) of the lower stair section (2) and the supporting surface (31).

4. The sectional single-tread staircase according to claim 1, characterized in that: A polystyrene filling layer (8) is provided between the second connection portion (7) of the upper step (1) and the first connection portion (6) of the lower step (2), and a polyethylene rod is embedded in the polystyrene filling layer (8), one end of the polyethylene rod abuts against the second connection portion (7) of the upper step (1), and the other end abuts against the first connection portion (6) of the lower step (2).

5. The sectional single-tread staircase according to claim 1, characterized in that: The first connecting portion (6) comprises a tread panel (61) and a riser panel (62) arranged perpendicular to the tread panel (61); the tread panel (61) in the lower stair section (2) is supported on the support surface (31) and is in surface contact with the support surface (31).

6. The sectional single-tread staircase according to claim 1, characterized in that: The second connecting portion (7) comprises a supporting portion arranged in a vertical direction, the supporting portion being provided with a horizontal bottom surface (71) and a vertical surface (72) arranged perpendicular to the horizontal bottom surface (71), the horizontal bottom surface (71) in the upper stair section (1) being supported on the supporting surface (31) and in surface contact with the supporting surface (31), and the vertical surface (72) in the upper stair section (1) being in abutment with the first connecting portion (6) of the lower stair section (2).

7. The sectional single-tread staircase according to any one of claims 1 to 6, characterized in that: The second connection part (7) is provided with a sliding hinge support for installing the second connection part (7) on a structural foundation, the second connection part (7) of the upper stair section (1) is connected to the supporting surface (31) via the sliding hinge support, and the second connection part (7) of the lower stair section (2) is connected to the lower floor via the sliding hinge support.

Images