Prefabricated stair facilitating auxiliary hoisting

Abstract

The utility model discloses a prefabricated staircase convenient to assist in hoisting, and relates to the technical field of prefabricated staircases, the prefabricated staircase comprises an assembly type concrete prefabricated staircase, two groups of movable grooves are symmetrically formed in the two sides of the assembly type concrete prefabricated staircase, and an embedded box is embedded in one end, located in the assembly type concrete prefabricated staircase, of each movable groove; a limiting plate is movably connected into the embedded box, a limiting cylinder is fixed to one side of the limiting plate, a threaded groove is formed in the limiting cylinder, a threaded rod is in threaded connection with the interior of the threaded groove, a connecting plate is fixed to the outer side of the threaded rod, and a hanging ring is fixed to the outer side of the connecting plate. A movable plate is connected to the outer side of the connecting plate, and a sealing plate is detachably connected to the end, located outside the assembly type concrete prefabricated stair, of the movable groove. According to the utility model, the influence of external factors on normal use of the lifting lug and certain influence on the prefabricated stair structure due to stress concentration in the lifting process can be avoided, and the lifting lug is more convenient to use and can be reused.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated staircase technology, and in particular to a prefabricated staircase that is easy to assist in hoisting. Background Technology

[0002] Currently, the most common method for hoisting prefabricated stairs is to pre-embed lifting lugs on both sides of the stairs. However, this method has several drawbacks: the lugs, directly embedded on the outside, are susceptible to corrosion and impacts due to their exposed nature, affecting their proper function. Furthermore, stress concentration during hoisting can negatively impact the staircase structure. Additionally, the lugs need to be cut after hoisting, increasing workload, making them inconvenient to use, and preventing reuse. Therefore, this invention proposes a prefabricated staircase design that addresses these issues and facilitates hoisting. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a prefabricated staircase that avoids the impact of external factors on the normal use of the lifting lugs and the impact of stress concentration on the prefabricated staircase structure during the hoisting process, and which does not require cutting the lifting lugs after hoisting on the installation site, is convenient to use, and can be reused to facilitate hoisting.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a prefabricated staircase that is easy to assist in hoisting, including a prefabricated concrete staircase. Two sets of movable slots are symmetrically opened on both sides of the prefabricated concrete staircase. An embedded box is pre-embedded at one end of the movable slot inside the prefabricated concrete staircase. A limit plate is movably connected inside the embedded box. A limit cylinder is fixed on one side of the limit plate. A threaded groove is provided inside the limit cylinder. A threaded rod is threadedly connected inside the threaded groove. A connecting plate is fixed on the outside of the threaded rod. A lifting ring is fixed on the outside of the connecting plate. A movable plate is connected to the outside of the connecting plate. A sealing plate is detachably connected to one end of the movable slot outside the prefabricated concrete staircase.

[0005] Furthermore, both ends of the precast concrete staircase are fixed with assembly plates, and both ends of the assembly plates are provided with mounting holes.

[0006] Furthermore, the cross-section of the embedded box is convex; the upper and lower ends of the embedded box are open.

[0007] Furthermore, the width of the limiting plate matches the internal width of the embedded box, and the limiting plate is rectangular.

[0008] Furthermore, the movable plate has a connecting groove inside, which connects to the connecting plate. Specifically, the connecting groove has screw holes evenly distributed on one side inside the movable plate, and the connecting plate is connected to the connecting plate via a first bolt and the screw holes.

[0009] Furthermore, the movable groove is provided with second bolts at one end of the precast concrete staircase, and the sealing plate is provided with corresponding mounting holes. The sealing plate is installed on the second bolts and fixed with nuts.

[0010] Furthermore, the sealing plate has an auxiliary hole inside, and the auxiliary hole has an L-shaped cross-section.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By incorporating movable slots, embedded boxes, limit plates, limit cylinders, threaded rods, connecting plates, lifting rings, movable plates, and sealing plates, the lifting rings are pulled out for hoisting during use and retracted for concealment when not in use. This prevents external factors from affecting the normal operation of the lifting lugs. During hoisting, the connecting plates and movable plates prevent stress concentration from impacting the prefabricated staircase structure. After hoisting on-site, the threaded rods, connecting plates, lifting lugs, and movable plates can be directly removed without cutting the lifting lugs, making them more convenient to use and allowing for reuse. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a front view structural diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a top view of an embodiment of the present utility model.

[0016] Figure 3 This is a top view cross-sectional structural diagram of the interior of the movable groove in an embodiment of the present utility model;

[0017] Figure 4 This is a top view cross-sectional structural diagram of the interior of the movable groove during use in an embodiment of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the limiting plate, limiting cylinder, and movable plate according to an embodiment of the present utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the threaded rod and connecting plate according to an embodiment of the present invention.

[0020] Explanation of the reference numerals in the figure:

[0021] 1. Precast concrete staircase; 2. Assembly panel; 3. Sealing plate; 4. Mounting hole; 5. Threaded rod; 6. Auxiliary hole; 7. Nut; 8. Second bolt; 9. Movable groove; 10. Lifting ring; 11. Movable plate; 12. Connecting groove; 13. Connecting plate; 14. Screw hole; 15. First bolt; 16. Embedded box; 17. Limiting plate; 18. Limiting cylinder; 19. Threaded groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] See Figures 1 to 6 This utility model provides a prefabricated staircase that facilitates hoisting, including a prefabricated concrete staircase 1. Two sets of movable grooves 9 are symmetrically arranged on both sides of the prefabricated concrete staircase 1. An embedded box 16 is pre-embedded at one end of the movable groove 9 inside the prefabricated concrete staircase 1. A limiting plate 17 is movably connected inside the embedded box 16. A limiting cylinder 18 is fixed to one side of the limiting plate 17. A threaded groove 19 is provided inside the limiting cylinder 18. A threaded rod 5 is threadedly connected inside the threaded groove 19. A connecting plate 13 is fixed to the outside of the threaded rod 5. A lifting ring 10 is fixed to the outside of the connecting plate 13. A movable plate 11 is connected to the outside of the connecting plate 13. A sealing plate 3 is detachably connected to one end of the movable groove 9 outside the prefabricated concrete staircase 1.

[0024] In this embodiment, both ends of the precast concrete staircase 1 are fixed with assembly plates 2, and both ends of the assembly plates 2 are provided with mounting holes 4. In use, the mounting holes 4 facilitate the assembly and connection of the assembly plates 2 with the corner of the staircase end.

[0025] In this embodiment, the cross-section of the embedded box 16 is convex; the upper and lower ends of the embedded box 16 are open to install the limiting plate 17 and the limiting cylinder 18.

[0026] In this embodiment, the width of the limiting plate 17 matches the internal width of the embedded box 16. The limiting plate 17 is rectangular and can be used to limit the four corners during hoisting.

[0027] In this embodiment, the movable plate 11 has a connecting groove 12 inside, which is connected to the connecting plate 13. Specifically, the connecting groove 12 has screw holes 14 evenly arranged on one side inside the movable plate 11. The connecting plate 13 is connected to the connecting plate 13 by a first bolt 15 and the screw holes 14. In use, the connecting groove 12, the connecting plate 13, the screw holes 14 and the first bolt 15 facilitate the installation of the movable plate 11.

[0028] In this embodiment, the movable groove 9 is provided with second bolts 8 evenly distributed at one end outside the precast concrete staircase 1, and the sealing plate 3 is provided with corresponding mounting holes. The sealing plate 3 is installed on the second bolts 8 and fixed by nuts 7.

[0029] In this embodiment, the sealing plate 3 is provided with an auxiliary hole 6 inside. The cross-section of the auxiliary hole 6 is L-shaped. In use, the auxiliary hole 6 facilitates the removal of the sealing plate 3 by external tools after the sealing plate 3 is unfixed.

[0030] Working principle: When the precast concrete staircase 1 needs to be hoisted and transported, the sealing plate 3 is removed, and the lifting ring 10 is pulled outward to move the movable plate 11, the limiting cylinder 18, and the limiting plate 17 outward. When the lifting ring 10 moves to the outside, the limiting plate 17 fits against the top of the embedded box 16, so that the precast concrete staircase 1 can be hoisted with the lifting ring 10. When not in use, the lifting ring is retracted and hidden to avoid external factors affecting the normal use of the lifting lug. During the hoisting process, the setting of the connecting plate and the movable plate can avoid stress concentration from affecting the structure of the precast staircase. After hoisting at the installation site, the threaded rod, connecting plate, lifting lug, and movable plate can be directly removed without cutting the lifting lug, making it more convenient to use and reusable.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A prefabricated staircase that facilitates hoisting, characterized in that: The invention includes a precast concrete staircase, wherein two sets of movable slots are symmetrically provided on both sides of the precast concrete staircase. An embedded box is pre-embedded at one end of the movable slot inside the precast concrete staircase. A limit plate is movably connected inside the embedded box. A limit cylinder is fixed on one side of the limit plate. A threaded groove is provided inside the limit cylinder. A threaded rod is threadedly connected inside the threaded groove. A connecting plate is fixed on the outside of the threaded rod. A lifting ring is fixed on the outside of the connecting plate. A movable plate is connected to the outside of the connecting plate. A sealing plate is detachably connected to one end of the movable slot outside the precast concrete staircase.

2. The prefabricated staircase for easy hoisting as described in claim 1, characterized in that: The precast concrete staircase has assembly plates fixed at both ends, and each assembly plate has mounting holes at both ends.

3. A prefabricated staircase that facilitates auxiliary hoisting according to claim 1 or 2, characterized in that: The embedded box has a convex cross-section; the upper and lower ends of the embedded box are open.

4. A prefabricated staircase that facilitates auxiliary hoisting according to claim 1 or 2, characterized in that: The width of the limiting plate matches the internal width of the embedded box, and the limiting plate is rectangular.

5. A prefabricated staircase that facilitates auxiliary hoisting according to claim 1 or 2, characterized in that: The movable plate has a connecting groove inside, and the connecting groove is connected to the connecting plate.

6. A prefabricated staircase that facilitates auxiliary hoisting according to claim 5, characterized in that: The connecting groove is located on one side inside the movable plate, where screw holes are evenly arranged. The connecting plate is connected to the connecting plate by the first bolt and the screw holes.

7. A prefabricated staircase that facilitates auxiliary hoisting according to claim 6, characterized in that: The movable groove is located at one end of the precast concrete staircase, where second bolts are evenly distributed. The sealing plate has corresponding mounting holes, and the sealing plate is installed on the second bolts and fixed with nuts.

8. A prefabricated staircase that facilitates auxiliary hoisting according to claim 1 or 2, characterized in that: The sealing plate has an auxiliary hole inside, and the cross-section of the auxiliary hole is L-shaped.

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