A prefabricated stair

Abstract

The utility model relates to prefabricated stair technology field, concretely is a kind of prefabricated stair, including ladder section board, and several steps are prefabricated on its upper end face;Stair support is respectively set in the lower end of the both sides of ladder section board, and the butt joint mechanism is set between ladder section board and stair support.The utility model is used in cooperation with the slope one of the slope two on trapezoidal block and the both ends of rectangular groove, realizes the automatic guidance and alignment of horizontal position between ladder section board and stair support in hoisting process, effectively solve the defect that " wrong platform " or " shift " is easily produced when traditional prefabricated stair is installed due to no accurate guiding structure.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated staircase technology, specifically a prefabricated staircase. Background Technology

[0002] With the rapid development of industrialized construction, prefabricated buildings have been widely used in residential and public buildings due to their advantages such as fast construction speed, controllable quality, and environmental friendliness. As a key vertical transportation component in prefabricated buildings, the convenience, precision, and reliability of the design, production, and on-site installation of prefabricated stairs directly affect the overall construction efficiency and final quality of the project.

[0003] In traditional prefabricated staircase installation, the connection between the stair slab and the pre-embedded stair supports is usually a simple flat-end lap joint with grouting or welding. Because there is no effective guiding and positioning structure between the stair slab and the support at the lap joint that can automatically function during installation, the alignment mainly relies on the visual inspection and experience of the operators. During hoisting and positioning, visual deviations or slight shaking can easily cause horizontal misalignment between the stair slab and the support, resulting in "misalignment" or "displacement" after installation. Utility Model Content

[0004] The purpose of this invention is to provide a prefabricated staircase to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A prefabricated staircase, including

[0007] The upper surface of the stepped slab has several steps pre-formed.

[0008] Stair supports are respectively installed at the lower ends of both sides of the stair tread, and a docking mechanism is provided between the stair tread and the stair supports.

[0009] Preferably, the docking mechanism includes connecting bosses pre-formed at both ends of the stair slab and docking grooves opened at the top of the side of the stair support near the stair slab. The stair support has a rectangular groove opened downward in the middle of the docking groove. Both ends of the rectangular groove and the docking groove are formed with inclined surfaces, and the two inclined surfaces form a "V" shape.

[0010] Preferably, the docking mechanism further includes a trapezoidal block preformed on the lower end face of the connecting boss, and a rectangular block preformed on the lower end face of the trapezoidal block. Both sides of the trapezoidal block are formed with a second inclined surface that matches the first inclined surface, and the rectangular block matches the rectangular groove.

[0011] Preferably, the stair support has a bottom groove in the middle of the bottom end on the side near the stair tread, and the stair support has several through holes between the bottom groove and the rectangular groove. The bottom end of the rectangular block has several threaded holes, and the stair support and the rectangular block are detachably connected by bolts.

[0012] Preferably, after the stair slab is connected to the stair support, the lower vertical sides of both sides of the stair slab are correspondingly arranged and adjacent to the opposite vertical sides of the two stair supports.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This type of prefabricated staircase, through the cooperation of the second inclined surface on the trapezoidal block and the first inclined surface at both ends of the rectangular groove, achieves automatic guidance and alignment of the horizontal position between the stair slab and the stair support during hoisting, effectively solving the defects of "misalignment" or "displacement" that are easily generated during the installation of traditional prefabricated staircases due to the lack of a precise guiding structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the trapezoidal block installation structure of this utility model;

[0017] Figure 3 For the present utility model Figure 1 Enlarged diagram of point A in the middle.

[0018] In the diagram: 1. Stair tread; 2. Step; 3. Stair support; 4. Connecting boss; 5. Rectangular groove; 6. Inclined surface one; 7. Trapezoidal block; 8. Rectangular block; 9. Inclined surface two; 10. Bottom groove; 11. Threaded hole; 12. Bolt; 13. Butt joint groove. Detailed Implementation

[0019] 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.

[0020] like Figure 1-3 As shown, this utility model provides a technical solution:

[0021] A prefabricated staircase includes a stair slab 1 with several steps 2 prefabricated on its upper surface, and stair supports 3 respectively disposed on the lower ends of both sides of the stair slab 1. A docking mechanism is provided between the stair slab 1 and the stair supports 3. The docking mechanism includes connecting bosses 4 prefabricated at both ends of the stair slab 1 and docking grooves 13 formed at the top of the side of the stair supports 3 near the stair slab 1. A rectangular groove 5 is formed downward in the middle of the docking groove 13 on the stair supports 3. Both ends of the rectangular groove 5 and the docking groove 13 are formed with inclined surfaces 6, which are V-shaped. The docking mechanism also includes a trapezoidal block 7 prefabricated on the lower surface of the connecting bosses 4. And a rectangular block 8 prefabricated on the lower end face of the trapezoidal block 7. Both sides of the trapezoidal block 7 are formed with inclined surfaces 9 that match the inclined surfaces 6. The rectangular block 8 matches the rectangular groove 5. The bottom center of the bottom end of the stair support 3 near the stair plate 1 is provided with a bottom groove 10. The stair support 3 is provided with several through holes between the bottom groove 10 and the rectangular groove 5. The bottom end of the rectangular block 8 is provided with several threaded holes 11. The stair support 3 and the rectangular block 8 are detachably connected by bolts 12. When the stair plate 1 and the stair support 3 are connected, the vertical sides of the lower part of both sides of the stair plate 1 are correspondingly set and adjacent to the vertical sides of the two stair supports 3.

[0022] In this embodiment, by using the inclined surface 9 on the trapezoidal block 7 in conjunction with the inclined surface 6 at both ends of the rectangular groove 5, the horizontal position between the stair section 1 and the stair support 3 is automatically guided and aligned during the hoisting process, effectively solving the defects of "misalignment" or "displacement" that are easily generated during the installation of traditional prefabricated stairs due to the lack of a precise guiding structure.

[0023] Working principle: During installation, the two stair supports 3 are first fixed to the building structure. Then, the stair plate 1 is hoisted and its connecting bosses 4 at both ends are aligned with the docking grooves 13 on both sides and lowered. Even if there is a deviation in the initial position, causing the rectangular block 8 to not align with the rectangular groove 5, after the connecting bosses 4 enter the docking groove 13, as the stair plate 1 continues to fall, the inclined surfaces 9 on both sides of the trapezoidal block 7 will contact and slide along the inclined surfaces 6 at both ends of the rectangular groove 5. The guiding effect of these mutually cooperating inclined surfaces will automatically push the rectangular block 8 to move horizontally until it is precisely aligned and completely falls into the rectangular groove 5. At the same time, the vertical sides of the lower part of both sides of the stair plate 1 will automatically align with the vertical sides of the two stair supports 3 and become adjacent to each other, achieving initial positioning and limiting. Then, the bolts 12 are passed through the through holes on the stair supports 3 through the bottom groove 10 and screwed into the threaded holes 11 at the bottom of the rectangular block 8. After tightening, the firm and detachable connection between the stair plate 1 and the stair support 3 is completed.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A prefabricated staircase, characterized in that: include The upper end face of the stepped slab (1) has several steps (2) pre-formed. Stair support (3) is provided on both sides of the lower end of the stair slab (1), and a docking mechanism is provided between the stair slab (1) and the stair support (3); The docking mechanism includes connecting bosses (4) pre-formed at both ends of the stair slab (1) and docking groove (13) opened at the top of the side of the stair support (3) near the stair slab (1). The stair support (3) is provided with a rectangular groove (5) in the middle of the docking groove (13). Both ends of the rectangular groove (5) and the docking groove (13) are formed with inclined surfaces (6), and the two inclined surfaces (6) are in the shape of "V". The docking mechanism also includes a trapezoidal block (7) preformed on the lower end face of the connecting boss (4) and a rectangular block (8) preformed on the lower end face of the trapezoidal block (7). Both sides of the trapezoidal block (7) are formed with a second inclined surface (9) that matches the first inclined surface (6). The rectangular block (8) matches the rectangular groove (5).

2. A prefabricated staircase according to claim 1, characterized in that: The stair support (3) has a bottom groove (10) in the middle of the bottom end near the stair tread (1). The stair support (3) has several through holes between the bottom groove (10) and the rectangular groove (5). The bottom end of the rectangular block (8) has several threaded holes (11). The stair support (3) and the rectangular block (8) are detachably connected by bolts (12).

3. A prefabricated staircase according to claim 2, characterized in that: When the stair plate (1) is connected to the stair support (3), the lower vertical sides of both sides of the stair plate (1) are correspondingly set and adjacent to the vertical sides of the two stair supports (3).

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