Pre-embedded positioning device for pre-embedded bolts of prefabricated stairs

Abstract

The utility model belongs to the technical field of building construction auxiliary devices, and discloses a pre-embedded positioning device for pre-embedded bolts of a prefabricated stair. Comprising a fixing base, a connecting rod and a temporary fixing screw. Temporary fixing screws are symmetrically connected to the two ends of the connecting rod, the bottoms of the temporary fixing screws are connected with a fixing base, and the bottom of the fixing base is connected with a beam bottom formwork. The heights of the two temporary fixing screw rods are equal; the connecting rod is provided with a long slotted hole for mounting the pre-embedded screw rod; a graduated scale is slidably connected to the long slotted hole; the two pre-embedded screws penetrate through the long slotted holes and are fixedly connected with the connecting rod, and the two pre-embedded screws are perpendicular to the connecting rod; according to the utility model, the embedded bolt can be kept at an accurate position in the concrete pouring process and is not influenced by concrete impact, so that the reliability of connection between the prefabricated stair and the stair beam and the stability of the whole structure are better ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to building construction auxiliary device technical field, specifically is a prefabricated stair embedded bolt embedded positioning device. BACKGROUND

[0002] In prefabricated building, prefabricated stairs and cast-in-place ladder section plate are generally connected through the bolt embedded in the ladder beam. The accuracy of the embedded position of the connecting bolt of the prefabricated stairs and the main structure is crucial. If the embedded position of the bolt is deviated or the embedded bolt is skewed in the concrete pouring process, the installation difficulty of the prefabricated stairs will be greatly increased, and the success rate of the installation of the prefabricated stairs will be affected. The traditional embedding method often relies on manual measurement and positioning, and the error is large, and the bolt is easy to shift in the concrete pouring process, which affects the installation precision and structural stability of the prefabricated stairs. CONTENT OF THE UTILITY MODEL

[0003] The utility model overcomes the defects of the prior art and provides a prefabricated stair embedded bolt embedded positioning device, which can avoid the shifting and skewing of the embedded bolt and reduce the installation difficulty of the prefabricated stairs.

[0004] In order to achieve the above purpose, the utility model is implemented by the following technical scheme:

[0005] A prefabricated stair embedded bolt embedded positioning device, comprising a fixed base, a connecting rod and a temporary fixing screw rod, the connecting rod is symmetrically connected with the temporary fixing screw rod at both ends, the bottom of the temporary fixing screw rod is connected with the fixed base, and the bottom of the fixed base is connected with the beam bottom template, the heights of the two temporary fixing screw rods are equal.

[0006] A long slot hole for installing the embedded screw rod is arranged on the connecting rod, a scale is slidably connected on the long slot hole, the two embedded screw rods pass through the long slot hole and are fixedly connected with the connecting rod, and the two embedded screw rods are perpendicular to the connecting rod.

[0007] Further, a first lower positioning nut is arranged on the temporary fixing screw rod, the first lower positioning nuts on the two temporary fixing screw rods are at the same height, and the connecting rod is located above the first lower positioning nut.

[0008] Further, the connecting rod is fixed with the temporary fixing screw rod through a first upper fastening nut.

[0009] Further, the fixed base is in the shape of a horse stool and comprises a top surface and two side legs, screw holes are arranged on the top surface, and the temporary fixing screw rod is connected with the screw holes.

[0010] Further, a limiting ring protruding from the lower end of the temporary fixing screw rod is arranged, the temporary fixing screw rod is installed in the screw hole, and the limiting ring abuts against the upper side of the screw hole.

[0011] Further, a second upper fastening nut is arranged on each of the two embedded screw rods, and the second upper fastening nuts on the two embedded screw rods are located at the same positions of the two embedded screw rods; the two embedded screw rods are fixed with the connecting rod through the second lower positioning nut.

[0012] Further, the connecting rod is provided with mounting holes at both ends, and the mounting holes of the connecting rod are sleeved on the temporary fixing screw rod.

[0013] Further, the scale is provided with a rotating shaft, the scale is rotationally connected with the rotating shaft, and the bottom of the rotating shaft is slidingly connected in the long slot hole.

[0014] The beneficial effects of the utility model relative to the prior art are:

[0015] (1) improve positioning accuracy

[0016] The traditional method such as iron wire binding or reinforcing steel bar welding fixed embedded bolt is prone to bolt deviation due to artificial difference and reinforcing steel bar displacement, and the positioning device can accurately position and fix the bolt through specific fixing device and limiting device, effectively avoids the displacement and inclination of the bolt in the installation and concrete pouring process, and ensures the connection accuracy of the prefabricated stair installation.

[0017] (2) enhance stability

[0018] Part of the fixing mode in the prior art is not stable enough, and the positioning device of the utility model is closely connected with the ladder beam formwork, provides more stable support and fixation for the connecting bolt, can keep the accurate position in the concrete pouring process, is not affected by the impact of concrete, and thus better guarantees the reliability of the prefabricated stair and the stability of the overall structure.

[0019] (3) improve construction efficiency

[0020] Compared with the traditional complex and time-consuming fixing method, the positioning device is simple in structure and convenient to operate, can quickly complete the pre-buried positioning of the connecting bolt, reduces the construction time and labor cost, speeds up the installation progress of the prefabricated stair, and improves the overall construction efficiency.

[0021] (4) can be recycled

[0022] The fixing device in part of the prior art cannot be recycled or the recycling cost is high, the novel positioning device is designed to be detachable and recyclable, can be conveniently detached after the concrete pouring is completed, and can be repeatedly used, thereby reducing the construction cost, improving the resource utilization rate, meeting the requirements of environmental protection and resource saving.

[0023] (5) guarantee construction quality

[0024] Through accurate positioning and firm fixing, the connection between the prefabricated stair and the stair beam is more close and accurate, the quality problems such as stair shaking and stair deviation caused by insecure connection or position deviation are reduced, the installation quality of the prefabricated stair and the quality and safety performance of the whole building are improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A side sectional view of the prefabricated stair embedded bolt embedded positioning device is provided for the utility model;

[0026] Figure 2 A top view of the connecting rod is provided for the utility model.

[0027] In the drawings:

[0028] 1, fixed base; 2, connecting rod; 3, temporary fixing screw; 4, first lower positioning nut; 5, mounting hole; 6, first upper fastening nut; 7, embedded screw; 8, long slot hole; 9, second upper fastening nut; 10, scale; 11, beam bottom formwork; 12, second lower positioning nut; 13, concrete; 14, rotating shaft. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer and more apparent, the utility model is further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model. The technical solutions of the utility model are described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0030] Referring to Figure 1 and Figure 2 , the embodiment provides a prefabricated stair embedded bolt embedded positioning device; the device comprises two fixed bases 1 and a connecting rod 2, each of the fixed bases 1 is provided with a temporary fixing screw 3, the fixed base 1 is a horse stool type structure, comprising a top surface and two side legs, the top surface is provided with a threaded hole, the lower end of the temporary fixing screw 3 is provided with a limiting ring protruding outward, the temporary fixing screw 3 is installed in the threaded hole, and the limiting ring abuts against the upper side of the threaded hole.

[0031] The temporary fixing screw 3 is provided with a first lower positioning nut 4, and the first lower positioning nuts 4 on the two temporary fixing screws 3 are at the same height; the connecting rod 2 is horizontally arranged, the connecting rod 2 is provided with mounting holes 5 at both ends, the mounting holes 5 of the connecting rod 2 are sleeved on the temporary fixing screws 3, the connecting rod 2 is located above the first lower positioning nuts 4, and the connecting rod 2 is fixed with the temporary fixing screws 3 through first upper fastening nuts 6.

[0032] The connecting rod 2 is provided with a long slot hole 8 for installing a pre-buried screw rod 7. The long slot hole 8 on the connecting rod 2 is an elongated structure, and two mounting holes 5 are located at both ends of the long slot hole 8. A scale ruler 10 is slidably connected to the long slot hole 8, and the scale ruler 10 is provided with a rotating shaft 14. The scale ruler 10 is rotatably connected to the rotating shaft 14, and the bottom of the rotating shaft 14 is slidably connected in the long slot hole 8.

[0033] Second upper fastening nuts 9 are installed on the two pre-buried screw rods 7 respectively, and the second upper fastening nuts 9 on the two pre-buried screw rods 7 are located at the same position of the two pre-buried screw rods 7. The two pre-buried screw rods 7 pass through the long slot hole 8 of the connecting rod 2, and the second lower positioning nuts 12 are screwed on the pre-buried screw rods 7, thereby fixing the two pre-buried screw rods 7 with the connecting rod 2 through the second lower positioning nuts 12.

[0034] First, fix the first pre-buried screw rod 7, adjust the position of the second pre-buried screw rod 7 through the scale ruler 10, and then fix the second pre-buried screw rod 7 after the distance between the two pre-buried screw rods 7 reaches the set value, so that the two pre-buried screw rods 7 are fixed on the connecting rod 2 and perpendicular to each other. After the rest platform formwork is completed and the bottom reinforcement is well tied, the two fixed bases 1 are fixed on the beam bottom formwork 11 according to the preset position.

[0035] A prefabricated stair connecting bolt pre-buried positioning device, the use method comprising the following steps:

[0036] 1) Second upper fastening nuts 9 are screwed on the two pre-buried screw rods 7 respectively, and the second upper fastening nuts 9 on the two pre-buried screw rods 7 are located at the same position of the two pre-buried screw rods 7;

[0037] 2) The two pre-buried screw rods 7 pass through the long slot hole 8 of the connecting rod 2, and the second lower positioning nuts 12 are screwed on the pre-buried screw rods 7. First, fix the first pre-buried screw rod 7, adjust the position of the second pre-buried screw rod 7 through the scale ruler 10, and then fix the second pre-buried screw rod 7 in the same way after the distance between the two pre-buried screw rods 7 reaches the set value, so that the two pre-buried screw rods 7 are fixed on the connecting rod 2 and perpendicular to each other;

[0038] 3) After the rest platform formwork is completed and the bottom reinforcement is well tied, the two fixed bases 1 are fixed on the beam bottom formwork 11 according to the preset position.

[0039] 4) The temporary fixing screw rod 3 is installed into the screw hole of the fixed base 1;

[0040] 5) The first lower positioning nut 4 is screwed on the temporary fixing screw rod 3, and the height is adjusted so that the first lower positioning nuts 4 on the two temporary fixing screw rods 3 are at the same height;

[0041] 6) The connecting rod 2 is sleeved on the temporary fixing screw rod 3 at both ends, and the first upper fastening nut 6 is screwed in to fix the connecting rod 2 above the first upper fastening nut 6, and the connecting rod 2 is flush at both ends;

[0042] 7) Pouring concrete 13;

[0043] 8) After pouring is completed and the concrete 13 is initially cured, the connecting rod 2 and the temporary fixing screw rod 3 are removed, and the lower end of the embedded screw rod 7 is placed in the concrete 13;

[0044] 9) Repairing the hole left after the temporary fixing screw rod 3 is removed;

[0045] 10) Starting to hoist the prefabricated stair section.

[0046] The device installs two embedded screw rods 7 on the same connecting rod 2, adjusts the positions of the two embedded screw rods 7 in advance through the self-provided adjustable scale 10, so that the spacing of the two embedded screw rods 7 reaches a set value, facilitates subsequent installation of the prefabricated stair, and the connecting rod 2 is limited by the first lower positioning nut 4 at both ends to be flush at both ends, so that the connecting rod 2 is kept in a horizontal state, the two embedded screw rods 7 are kept on the same horizontal line, and the two embedded screw rods 7 are perpendicular to the connecting rod 2, so that the two embedded screw rods 7 are not inclined during pouring of the concrete 13, the installation difficulty of the prefabricated stair is greatly reduced, and the success rate of installation of the prefabricated stair is improved.

[0047] After the prefabricated stair connecting bolt embedded positioning device is adopted, the following problems are solved:

[0048] The prefabricated stair connecting bolt embedded positioning device can effectively improve the positioning precision and stability of the prefabricated stair connecting bolt embedded positioning device, reduce construction errors, improve the installation quality and construction efficiency of the prefabricated stair, and has a broad application prospect and remarkable economic benefits and social benefits in the field of prefabricated assembly buildings.

[0049] The above content is a further detailed description of the utility model made in combination with the specific preferred embodiments, and cannot be regarded as limiting the specific embodiments of the utility model to this, and for ordinary skilled persons in the technical field to which the utility model belongs, a number of simple deductions or substitutions can be made without departing from the utility model, and all should be regarded as belonging to the utility model, and the scope of patent protection is determined by the submitted claims.

Claims

1. A prefabricated staircase embedded bolt embedded positioning device, characterized in that: It comprises a fixed base (1), a connecting rod (2) and a temporary fixing screw (3); the temporary fixing screws (3) are symmetrically connected to both ends of the connecting rod (2); the bottom of the temporary fixing screw (3) is connected to the fixed base (1), and the bottom of the fixed base (1) is connected to the beam bottom template (11); the heights of the two temporary fixing screws (3) are equal; The connecting rod (2) is provided with a long slotted hole (8) for installing the embedded screw rod (7); a scale (10) is slidably connected to the long slotted hole (8); two embedded screw rods (7) pass through the long slotted hole (8) and are fixedly connected to the connecting rod (2), and the two embedded screw rods (7) are perpendicular to the connecting rod (2).

2. A prefabricated staircase embedded bolt embedded positioning device according to claim 1, characterized in that: A first lower positioning nut (4) is provided on the temporary fixing screw rod (3), and the first lower positioning nuts (4) on the two temporary fixing screw rods (3) are at the same height; the connecting rod (2) is located above the first lower positioning nut (4).

3. The embedded bolt positioning device for prefabricated stairs according to claim 1, characterized in that: The connecting rod (2) is fixed to the temporary fixing screw rod (3) via a first upper fastening nut (6).

4. The embedded bolt positioning device for prefabricated stairs according to claim 1, characterized in that: The fixed base (1) is a horse stool-type structure, comprising a top surface and supporting legs on both sides, with screw holes provided on the top surface, and temporary fixing screw rods (3) connected to the screw holes.

5. The embedded bolt positioning device for prefabricated stairs according to claim 4, characterized in that: A protruding limiting ring is provided at the lower end of the temporary fixing screw (3). The temporary fixing screw (3) is installed in the screw hole, and the limiting ring is placed above the screw hole.

6. The embedded bolt positioning device for prefabricated stairs according to claim 1, characterized in that: A second upper fastening nut (9) is respectively installed on the two embedded screw rods (7), and the second upper fastening nuts (9) on the two embedded screw rods (7) are located at the same position of the two embedded screw rods (7); the two embedded screw rods (7) are fixed to the connecting rod (2) by a second lower positioning nut (12).

7. The embedded bolt positioning device for prefabricated stairs according to claim 1, characterized in that: Both ends of the connecting rod (2) are provided with mounting holes (5), and the mounting holes (5) of the connecting rod (2) are sleeved on the temporary fixing screw rod (3).

8. The embedded bolt positioning device for prefabricated stairs according to claim 1, characterized in that: A rotating shaft (14) is provided on the scale (10), the scale (10) is rotatably connected to the rotating shaft (14), and the bottom of the rotating shaft (14) is slidably connected in the long slot hole (8).

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