Hoisting tool for hanging bars of reinforcement cage

Abstract

The utility model relates to the field of constructional engineering, in particular to a hoisting tool for hanging bars of a reinforcement cage. The hoisting tool is used for connecting a hanging bar and a positioning frame lifting hook and comprises a fixing plate and a hanging part, and a fixing hole is formed in the middle of the fixing plate and used for allowing the hanging bar to penetrate through and be fixed; the hanging part comprises a lifting point plate, and a lifting hole for the positioning frame lifting hook to pass through is formed in the middle of the lifting point plate; and the fixing part is vertically connected with the hanging part. According to the utility model, the traditional welding hanging bar head is replaced by a movable connection structure, and the concave part of the fixing hole is matched with the rib part on the surface of the hanging bar, so that the hanging bar head can be firmly connected and is easy to disassemble and assemble. In addition, the hanging bars penetrate through the fixing holes and can continue to go deep, and the hanging parts reserve deep spaces for the hanging bars, so that the height of the hanging bars can be adjusted in the hoisting tool provided by the embodiment, and the positioning of the reinforcement cage is more accurate. Due to the fact that the procedure of hanging bar welding is omitted, the hoisting tool improves construction efficiency, meanwhile, the portion of the hanging bar head can be recycled, and economic benefits are improved.

Description

Technical Field

[0001] This embodiment relates to the field of construction engineering, and particularly to a hoisting tool for the lifting bars of a steel reinforcement cage. Background Art

[0002] For bored cast-in-place piles, pile holes need to be formed in the foundation soil at the construction site by means of mechanical drilling, steel pipe soil extrusion or manual excavation, etc., and a steel reinforcement cage is placed therein and then concrete is poured to form the pile foundation of large bridge buildings. During construction, the lifting bars are welded to the main bars of the steel reinforcement cage, and the other end of the lifting bars is welded to the lifting bar head. The lifting equipment lifts the lifting bar head, and then the lifting bars and the steel reinforcement cage are placed into the steel casing together. The lifting bar head refers to the part where the lifting bar is connected to other structural members, and it plays a role in fixing the lifting bar to the structure to ensure that the lifting bar can stably bear the load. In order to ensure that the steel reinforcement cage does not tilt left and right or float and sink with the poured concrete slurry after being placed in the steel casing, a guiding frame needs to be set at the mouth of the steel casing. Hooks are installed on the guiding frame, which can hook the lifting bar head, so that the lifting bars and the steel reinforcement cage are also kept at the predetermined positions, ensuring the stable position of the steel reinforcement cage.

[0003] In the existing construction process, the lifting bars need to be welded to the lifting bar head to ensure stable connection. The lifting bar head and the lifting bars carry the steel reinforcement cage into the steel casing. During the concrete pouring, the lifting bars are inside the casing. After the pouring is completed, due to the firm welding with the lifting bars, the lifting bar head cannot be easily recovered, or the strength and integrity after recovery cannot meet the standards. Utility Model Content

[0004] This embodiment of the specification provides a hoisting tool for the lifting bars of a steel reinforcement cage, which is used to connect the lifting bars and the hook of the positioning frame, and includes a fixing plate and a hanging part. A fixing hole is opened in the middle of the fixing plate for the lifting bars to pass through and be fixed; the hanging part includes a hanging point plate, and a hanging hole for the hook of the positioning frame to pass through is provided in the middle of the hanging point plate; the fixing part is vertically connected to the hanging part.

[0005] This embodiment of the specification replaces the traditional welded lifting bar head with a structure that can be movably connected. The concave part of the fixing hole matches the rib on the surface of the lifting bar, which can not only be firmly connected but also be easily disassembled and assembled. In addition, the lifting bar can continue to penetrate through the fixing hole, and the hanging part reserves a space for the lifting bar to penetrate, so that the lifting bar can finely adjust the height within the hoisting tool of this embodiment, making the positioning of the steel reinforcement cage more accurate. Since the process of welding the lifting bars is omitted, the hoisting tool of this embodiment improves the construction efficiency and enables the lifting bar head to be recycled, improving the economic benefits.

[0006] Further as a preferred solution, the fixing hole includes a concave part that matches the transverse rib on the surface of the lifting bar.

[0007] Further as an optimal solution, the diameter of the fixing hole matches the cross-sectional diameter of the suspension bar.

[0008] Further as an optimal solution, the concave portion includes a spiral groove, such that the suspension bar can be spirally connected to the fixing hole (11).

[0009] Further as an optimal solution, the hanging portion further includes a pair of hanging rods symmetrically arranged on both sides of the hanging point plate, the pair of hanging rods are parallel to each other and vertically penetrate through the fixing plate.

[0010] Further as an optimal solution, a pair of connection holes are symmetrically provided on both sides of the fixing hole; the connection holes match the hanging rods, such that the hanging rods can be correspondingly inserted into the connection holes.

[0011] Further as an optimal solution, a plurality of support portions are provided between the lower part of the fixing plate and the hanging rods, and the support portions form a bracket structure.

[0012] Further as an optimal solution, the length of the hanging rod is not less than ten times the diameter of the fixing hole.

[0013] Further as an optimal solution, the pair of hanging rods and the fixing plate are fixedly welded through the support portions.

[0014] The main beneficial effects of the above technical solutions are as follows:

[0015] By making the concave portion of the fixing hole match the rib portion on the surface of the suspension bar, the suspension bar and the lifting tool can be disassembled, and the lifting tool can be removed and recycled after pouring, reducing the cost. In addition, after the suspension bar passes through the lifting tool, fine adjustment can be performed in the height direction, thereby improving the positioning accuracy of the steel casing. The process of welding the suspension bar and the suspension bar head is omitted, improving the construction efficiency.

[0016] Further or more detailed beneficial effects will be described in combination with specific embodiments in the specific implementation manners. Description of the Drawings

[0017] The following further describes the present invention with reference to the drawings:

[0018] Figure 1 It is a structural diagram of the lifting tool of this embodiment.

[0019] As shown in the figure: fixing plate 1, fixing hole 11, connection hole 12, hanging portion 2, hanging point plate 21, hanging hole 22, hanging rod 23, support portion 3. Specific Implementation Manners

[0020] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the specific embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] A hoisting tool for the hoisting stirrup of a steel reinforcement cage, as Figure 1 shown, includes a fixing plate 1. A fixing hole 11 is formed in the middle of the fixing plate 1 for the hoisting stirrup to pass through and be fixed. The fixing hole 11 includes a concave portion that matches the transverse rib on the surface of the hoisting stirrup, so that the hoisting stirrup can be fixed to the fixing hole 11.

[0022] Specifically, the fixing plate 1 is a flat plate with a certain thickness, and a fixing hole 11 is formed at its center position. The diameter of the fixing hole 11 matches the cross-sectional diameter of the hoisting stirrup. One end of the hoisting stirrup is welded to the main reinforcement of the steel reinforcement cage, and the other end can just pass through the fixing hole 11 and be connected and fixed to the fixing plate 1. Since the hoisting stirrup is a solid straight rod-shaped steel bar with spiral ribs (i.e., threads) on its surface, which can provide better tensile performance, the inner wall of the fixing hole 11 is provided with a concave portion that can match the ribs. The two are engaged with each other to make the fixation tight and have connection strength. In this embodiment, the concave portion on the inner wall of the fixing hole 11 is set as a straight groove spiral groove, and the diameter and pitch of the groove match the cross-sectional diameter and pitch of the hoisting stirrup, so that the straight rod hoisting stirrup with threads on its surface can penetrate into the fixing hole 11 and be spirally connected with the concave portion. This connection can be tightened or loosened by rotating and penetrating, so as to realize the installation and disassembly of the hoisting tool and the hoisting stirrup.

[0023] The hoisting tool in the embodiment of this specification further includes a hanging portion 2, which is perpendicularly connected to the fixing plate 1. After the hoisting stirrup is fixed on the fixing plate 1, it needs to be connected to the guiding frame through the hanging portion 2. The hanging portion 2 is divided into a hanging point plate 21 and a pair of hanging rods 23 on both sides of the hanging point plate 21. As Figure 1 shown, the width of the hanging point plate 21 is the same as the width of the hanging rod 23. The hanging rod 23 is vertically arranged on the side of the hanging point plate 21. The two hanging rods 23 are parallel to each other, and the three together form a downward-opening planar structure and are perpendicular to the fixing plate 1. A hanging hole 22 is formed in the center of the hanging point plate 21, and the hanging hole 22 can be hung on the guiding frame, so as to connect the hoisting tool with the guiding frame.

[0024] In this embodiment, the mounting rod 23 vertically passes through the fixing plate 1 and is fixedly welded thereto, so that the mounting part 2 and the fixing plate 1 form an integral body, becoming a stable hoisting tool. Specifically, on the fixing plate 1, a pair of connecting holes 12 are symmetrically arranged on both sides of the fixing hole 11. The diameter of the connecting hole 12 matches the diameter of the mounting rod 23, and the distance between the two connecting holes 12 is the same as the distance between the mounting rods 23, so that the two mounting rods 23 can just be correspondingly inserted and pass through the two connecting holes 12, thereby completing the insertion connection between the mounting rod 23 and the fixing plate 1. In this embodiment, after the mounting rod 23 passes through the connecting hole 12, a rod length not less than the thickness of the fixing plate 1 is left below the fixing plate 1. That is, if the fixing plate is a steel plate with a thickness of 3 cm, the mounting rod 23 leaves a length of 5 cm below the fixing plate 1, making the connection stable and not easy to fall off. In addition, in some embodiments, the connection between the mounting rod 23 and the fixing plate 1, that is, the upper and lower orifices of the connecting hole 12, can be welded. On the premise that there is sufficient friction between the two when they are inserted into each other, the connection strength is further enhanced, improving the stability of the lifting tool.

[0025] In addition, the length of the mounting rod 23 is not less than ten times the diameter of the fixing hole 11, that is to say, the height of the mounting rod 23 left above the fixing plate 1 far exceeds the diameter of the suspension bar entering the fixing hole 11. After the suspension bar spirally enters the fixing hole 11, it can continue to be screwed inward, pass through the fixing hole 11 and extend upward in the height space of the mounting rod 23, so as to adjust the horizontal height of the suspension bar, and further accurately position the steel reinforcement cage.

[0026] In this embodiment, the above-mentioned mounting rod 23 and the connecting hole 12 are both symmetrically arranged, and the positions of the hanging holes 22 and the fixing holes 11 also correspond to each other. The setting of this embodiment makes the overall structure of the lifting tool balanced. After connecting the suspension bars, the gravity of the steel reinforcement cage below can be evenly distributed to the left and right horizontal directions, making the lifting tool evenly stressed, and thus maintaining the stable state of the suspension bars and the steel reinforcement cage.

[0027] Furthermore, a plurality of support parts 3 are provided between the fixing plate 1 and the mounting rod 23 below the fixing plate 1. The support part 3 uses an inclined plane to support the mutually perpendicular fixing plate 1 and the mounting rod 23, forming a corbel structure. The shape of the corbel structure is an inverted trapezoid with an upper plane and a lower inclined plane, and its contact surfaces with the fixing plate 1 and the mounting rod 23 are all fixedly welded, so that in addition to supporting each other between the fixing plate 1 and the mounting rod 23, they are also tightly connected. After the suspension bar enters the fixing hole 11, the gravity of the suspension bar and the steel reinforcement cage acts on the fixing plate 1, applying a downward pulling force to the fixing plate 1, while the corbel structure has an upward supporting force on the fixing plate 1, making the fixing plate 1 have better supporting strength and not easy to break, ensuring the safety and stability of the structure.

[0028] In practical applications, at least 4 hoisting tools according to the embodiments of this specification are required to withstand the tensile force of the weight of the steel reinforcement cage. The suspension bars are respectively located at four evenly divided points of the steel reinforcement cage, and then fixed to the hooks of the upper guide frame through this hoisting tool.

[0029] The beneficial effects that can be produced by this embodiment include:

[0030] 1. By using the concave part of the positioning hole to match the rib part on the surface of the suspension bar, it is easy to install and disassemble between the suspension bar and the hoisting tool. After the pouring is completed, the hoisting tool can be removed and recycled, reducing the construction cost.

[0031] 2. After the suspension bar passes through the hoisting tool, it can finely adjust the steel reinforcement cage in the height direction, rather than adjusting the height of the entire guide frame. It is simple and fast, improving the positioning accuracy of the steel casing.

[0032] 3. The process of welding the suspension bar and the suspension bar head is omitted. The hoisting tool has a simple structure, common materials, and is easy to process. When the worker operates, the suspension bar can be directly screwed in to be installed in place, improving the construction efficiency.

[0033] The above is only the preferred embodiment of the present invention, and does not limit the scope of the present invention. In addition, the terms "vertical", "horizontal", "front", "rear", etc. mentioned in the embodiments of the present invention indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. It should be further noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. in the description should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lifting device for a steel cage lifting rod, used to connect the lifting rod and the positioning frame hook, comprising a fixing plate (1) and a mounting part (2), characterized in that: The fixing plate (1) has a fixing hole (11) in the middle thereof for the suspension rod to pass through and be fixed; The mounting portion (2) comprises a hanging point plate (21), and a hanging hole (22) for the positioning frame hook to pass through is provided in the middle of the hanging point plate (21); The fixing plate (1) is vertically connected to the mounting portion (2).

2. The lifting device for steel cage lifting bars according to claim 1 is characterized by: The fixing hole (11) comprises an inner recess that matches the ribs on the surface of the suspension rod.

3. A lifting device for steel cage slings according to claim 2, characterized in that: The diameter of the fixing hole (11) matches the cross-sectional diameter of the suspension rod.

4. The lifting device for steel cage sling according to claim 2 is characterized in that: The inner recess comprises a spiral groove, so that the suspension rod can be spirally connected to the fixing hole (11).

5. The lifting device for steel cage lifting bars according to claim 1 is characterized in that: The mounting portion (2) further comprises a pair of mounting rods (23) symmetrically arranged on both sides of the hanging point plate (21); The pair of mounting rods (23) are parallel to each other and vertically pass through the fixing plate (1).

6. A lifting device for steel cage slings according to claim 5, characterized in that: A pair of connection holes (12) are symmetrically provided on both sides of the fixing hole (11); The connection hole (12) matches the mounting rod (23), so that the mounting rod (23) can be correspondingly inserted into the connection hole (12).

7. The lifting device for steel cage lifting bars according to claim 5, characterized in that: A plurality of support portions (3) are provided between the lower portion of the fixing plate (1) and the mounting rod (23), and the support portions (3) form a corbel structure.

8. The lifting device for steel cage lifting bars according to claim 5, characterized in that: The length of the mounting rod (23) is not less than ten times the diameter of the fixing hole (11).

9. The lifting device for steel cage lifting bars according to claim 7, characterized in that: The pair of mounting rods (23) and the fixing plate (1) are fixed by welding via the supporting portion.

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