Simple adjustable positioning tool for main reinforcement of reinforcement cage

Abstract

This utility model provides a simple and adjustable rebar cage main reinforcement positioning tool, including a main rod, a worm gear, and a positioning rod. A lower crossbar is provided at the lower part of the main rod, which supports the welded main reinforcement bars of the rebar cage. A limiting groove is formed on the front side of the middle of the main rod, and the positioning rod is installed in and guided by the limiting groove, supporting the main reinforcement bars to be welded in the rebar cage. The two ends of the worm gear are rotatably connected to the rear side of the middle of the main rod and are used to drive the positioning rod to move linearly along the limiting groove, thereby determining the height of the supporting surface of the positioning rod relative to the supporting surface of the lower crossbar. The worm gear and the positioning rod together constitute a cylindrical worm gear transmission system. This utility model solves the problem of positioning the spacing of main reinforcement bars in cast-in-place piles of different diameters, reduces the influence of human factors, avoids material waste caused by temporary positioning devices, and reduces construction costs.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a simple and adjustable tool for positioning the main reinforcement bars of a steel cage. Background Technology

[0002] With the rapid development of my country's economy and culture and the improvement of construction standards, bored rotary cast-in-place piles are widely used in deep foundation pit support structures and foundations of super high-rise buildings due to their numerous advantages. The reinforcement cages for pile foundations are mostly fabricated on-site or in processing areas. The earliest method for welding the main reinforcement bars involved workers manually lifting them and welding them to the evenly spaced marks on the positioning reinforcement bars. This gradually evolved into using temporary positioning devices made from on-site steel bars for welding. Manual welding easily leads to inconsistent positioning spacing of the main reinforcement bars, cumbersome operation steps, and low efficiency in processing the reinforcement cages. Temporary positioning devices greatly improve the positioning method of the main reinforcement bars, but their spacing cannot be changed, and they are only applicable to reinforcement cages of the same type and size, resulting in a limited scope of application and potential steel waste.

[0003] In the prior art, patent CN202020679649.1 discloses a simple rebar positioning device for a steel cage. The device includes: an operating handle with a support rod coaxially connected to either end; a positioning component for the main rebar to be welded and a locking component for the already welded main rebar are vertically arranged sequentially from top to bottom on either side of the support rod; a rebar clamping opening formed between the locking component for the already welded main rebar and the support rod, and a diagonal brace between the clamp and the positioning component for the main rebar to be welded, forming a triangular structure. This tool provides stable force, but it is only suitable for steel cages of the same type and size, the spacing of the main rebars cannot be changed, and the tolerance for error is low.

[0004] In the prior art, patent CN201920812111.0 discloses a portable tool for positioning and welding the main reinforcement bars of a steel cage. Its features include a main rod with a "7"-shaped upper slot at one end. The main rod also has a lower locking rod that can be adjusted along its length, in conjunction with the upper slot. Most components of this device are detachable and replaceable, but the components are complex to manufacture, the positioning distance between the main reinforcement bars is limited, and the short straight rod B1 is prone to loosening after repeated use. Utility Model Content

[0005] The purpose of this utility model is to provide a simple and adjustable tool for positioning the main reinforcement bars of a steel cage, addressing the shortcomings of existing technologies.

[0006] The specific technical solution is as follows:

[0007] A simple and adjustable tool for positioning the main reinforcement bars of a steel cage, comprising a main rod, a worm gear, and a positioning rod;

[0008] The lower part of the main rod is provided with a lower crossbar, which is used to support the welded main reinforcement bars of the steel cage; a limiting groove is opened on the front side of the middle part of the main rod, and the positioning rod is installed in the limiting groove and guided by it. The positioning rod is used to support the main reinforcement bars to be welded in the steel cage; the two ends of the worm gear are rotatably connected to the rear side of the middle part of the main rod and are used to drive the positioning rod to move linearly along the limiting groove to determine the height of the supporting surface of the positioning rod relative to the supporting surface of the lower crossbar.

[0009] The worm and the positioning rod together form a cylindrical worm gear transmission system. By rotating the input end of the worm, the operator can adjust the position of the positioning rod through the cylindrical worm gear transmission system, thereby controlling the preset distance between the main rib to be welded and the main rib that has already been welded.

[0010] Optionally, the upper outer surface of the main rod is provided with a diamond-shaped concave anti-slip texture.

[0011] Optionally, the main rod has scale markings along its length on its surface for auxiliary positioning.

[0012] Optionally, the scale marks are distributed at 30cm intervals to assist in positioning the main reinforcing bars to be welded.

[0013] Optionally, the positioning rod is used to support the end of the main reinforcement bar to be welded, and its shape is straight, so that it can be removed from the gap between the main reinforcement bars after welding is completed.

[0014] Optionally, the working surface of the worm gear is strengthened by at least one or a combination of heat treatment, precision grinding and honing processes to improve its hardness, wear resistance and transmission accuracy.

[0015] Optionally, a trapezoidal positioning block is provided at the straight end of the positioning rod, and the long side of the trapezoidal positioning block is provided with teeth that mesh with the worm gear.

[0016] Optionally, the lower crossbar has an inverted L-shaped groove at its end, and the inner wall of the groove is covered with a rubber anti-slip layer.

[0017] Optionally, a lubricant containing an anti-adhesion additive is applied to the meshing part of the worm gear and the positioning rod to improve transmission performance and durability.

[0018] Optionally, the worm gear, the positioning rod, and the lower crossbar are made of carbon steel or alloy steel to ensure sufficient structural strength and wear resistance.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This device solves the problem of positioning the spacing of the main reinforcement bars in the steel cage of cast-in-place piles with different pile diameters through the adjustability of the positioning rod, reduces the influence of human factors, avoids the material waste caused by temporary positioning devices, and reduces construction costs.

[0021] This device, with its simple and portable structure, is easy to manufacture and use. It effectively solves the problems of welding efficiency and processing quality of the main reinforcement bars of the steel cage, improves the construction efficiency of workers and the one-time forming rate of the steel cage, and can effectively save working hours, speed up the construction progress and production efficiency.

[0022] This device forms a cylindrical worm gear transmission system through a worm nut and a positioning rod. It can adjust the spacing of the main reinforcement bars and bear large loads. It solves the problem of inaccurate positioning of the main reinforcement bars due to insecure fixing during the welding process. In addition, it solves the problem of inaccurate connection of the lowered steel cage sleeve due to uneven spacing of the main reinforcement bars in the steel cage. It improves the welding stability and positioning accuracy of the main reinforcement bars in the steel cage and reduces the rework rate of the finished steel cage. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall structure of a simple and adjustable rebar cage main reinforcement positioning tool provided by this utility model;

[0024] Figure 2 A front view schematic diagram of a simple and adjustable rebar cage main reinforcement positioning tool provided by this utility model;

[0025] Figure 3 for Figure 2 A magnified structural diagram of the letter A in Chinese;

[0026] Figure 4 A schematic diagram of the structure of a simple and adjustable rebar cage main reinforcement positioning tool provided by this utility model during use.

[0027] In the diagram: 1. Diamond-shaped anti-slip texture; 2. Main rod; 3. Worm gear; 4. Positioning rod; 41. Trapezoidal positioning block; 5. Lower crossbar; 6. Positioning stirrup; 7. Welded main reinforcement; 8. Main reinforcement to be welded. Detailed Implementation

[0028] 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.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0031] This utility model provides a simple and adjustable rebar cage main reinforcement positioning tool, referring to... Figures 1-4 The system includes: a main rod 2, a worm gear 3, and a positioning rod 4; a lower crossbar 5 is provided at the lower part of the main rod 2, which is used to support the welded main reinforcement 7 of the steel cage; a limiting groove is opened on the front side of the middle part of the main rod 2, and the positioning rod 4 is installed in the limiting groove and guided by it, and the positioning rod 4 is used to support the main reinforcement 8 to be welded in the steel cage; the two ends of the worm gear 3 are rotatably installed on the rear side of the middle part of the main rod 2, and are used to drive the positioning rod 4 to move linearly along the limiting groove, so as to determine the height of the supporting surface of the positioning rod 4 relative to the supporting surface of the lower crossbar 5; wherein, the worm gear 3 and the positioning rod 4 together constitute a cylindrical worm gear 3 transmission system. By rotating the input end of the worm gear 3, the operator can adjust the position of the positioning rod 4 through the cylindrical worm gear 3 transmission system, thereby controlling the preset distance between the main reinforcement 8 to be welded and the welded main reinforcement 7.

[0032] Specifically, the main rod 2 serves as the load-bearing structure and reference component of the entire device, connecting and supporting various parts. The lower crossbar 5 is connected to the lower part of the main rod 2 through an integrated design or a robust method. A limiting groove is formed on the front side of the middle of the main rod 2 (from the operator's perspective). The limiting groove provides guidance for the positioning rod 4 and restricts its movement in the vertical direction. The rear side of the middle of the main rod 2 (from the operator's perspective) is designed with a mounting base or a specific connecting structure for securely mounting the worm gear 3. The lower crossbar 5 is used to stably support the top of the first or previous main rib that has been welded, providing a reliable reference plane for positioning the subsequent main ribs 8 to be welded. The positioning rod 4 is used to support and accurately position the next main rib to be welded. The vertical height of the positioning rod 4 (relative to the lower crossbar 5) directly determines the actual distance between two adjacent main ribs. The worm 3 is designed to be driven to rotate manually (e.g., by a handwheel or handle) or with the aid of a simple tool. The cylindrical worm 3 transmission system specifically refers to the mechanical transmission pair formed by the meshing of the externally threaded part of the worm 3 with the positioning rod 4 (or a threaded block that can move along the worm 3 connected to the positioning rod 4). As the worm 3 rotates, it generates axial movement, thereby driving the positioning rod 4 to linear displacement.

[0033] The upper outer surface of the main rod 2 is provided with diamond-shaped concave anti-slip texture 1 to enhance the friction when the operator holds and operates the tool, thereby improving stability and safety.

[0034] The main rod 2 has scale markings along its length on its surface for auxiliary positioning. These markings (e.g., in centimeters or millimeters, with a total length of 30cm or longer) provide an intuitive reference and auxiliary calibration for the operator when adjusting the spacing of the main ribs. In this embodiment, the scale markings are distributed at 30cm intervals to assist in positioning the main ribs 8 to be welded.

[0035] The positioning rod 4 is used to support the end of the main reinforcement bar 8 to be welded. It has a straight shape so that it can be removed from the gap between the main reinforcement bars after welding is completed.

[0036] In this embodiment, a trapezoidal positioning block 41 is provided at the straight end of the positioning rod 4. The long side of the trapezoidal positioning block 41 is provided with teeth that mesh with the worm gear 3, thus forming a mechanical transmission pair.

[0037] The lower crossbar 5 has an inverted L-shaped groove at its end, and the inner wall of the groove is covered with a rubber anti-slip layer.

[0038] The meshing part of the worm 3 and the positioning rod 4 is lubricated with a lubricant containing an anti-adhesion additive to reduce the resistance when the worm 3 rotates, making the adjustment operation easier and smoother, thereby improving transmission performance and durability.

[0039] The worm gear 3, positioning rod 4, and lower crossbar 5 are made of carbon steel or alloy steel to ensure that the entire device has sufficient structural strength, rigidity, and good wear resistance when subjected to operating forces, the weight of the main reinforcement, and accidental collisions that may occur on the construction site, so as to guarantee its durability and long-term reliability.

[0040] The working surface of the worm gear 3 is strengthened by at least one or a combination of heat treatment, precision grinding and honing processes to improve its hardness, wear resistance and transmission accuracy.

[0041] Implementation steps: (1) Determine the standard spacing between the main bars according to the engineering design drawings or relevant construction specifications of the steel cage; (2) The operator rotates the input end of the worm gear 3 and adjusts the vertical position of the positioning rod 4 through the transmission system of the cylindrical worm gear 3 until the vertical distance between the support surface of the positioning rod 4 and the support surface of the lower crossbar 5 is equal to the standard spacing determined in step (1). The scale marks on the main rod 2 can be used for auxiliary calibration; (3) After accurately welding the first main bar of the steel cage to the reinforcing hoop of the steel cage according to the design requirements, the lower crossbar 5 of this positioning tool is vertically and stably supported on the welded main bar. (4) Place the next main bar to be welded smoothly on the support surface of the positioning rod 4 that has been adjusted to the position. After the position is calibrated, weld it to the reinforcing hoop. (5) After the welding is completed, take out the positioning tool smoothly from the gap of the main bar. Then, roll or move the steel cage appropriately as needed. Then, support the lower horizontal bar 5 vertically on the main bar that has just been welded. After checking and confirming that the distance between the positioning rod 4 and the lower horizontal bar 5 is correct, place the next main bar to be welded. Repeat the calibration and welding operation of step (4). Repeat this process until all the main bars of the steel cage are welded according to the design requirements.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A simple and adjustable rebar cage main bar positioning tool, installed on a vehicle door interior panel, characterized in that, include: Main rod, worm gear, positioning rod; The lower part of the main rod is provided with a lower crossbar, which is used to support the welded main reinforcement bars of the steel cage; a limiting groove is opened on the front side of the middle part of the main rod, and the positioning rod is installed in the limiting groove and guided by it. The positioning rod is used to support the main reinforcement bars to be welded in the steel cage; the two ends of the worm gear are rotatably connected to the rear side of the middle part of the main rod and are used to drive the positioning rod to move linearly along the limiting groove to determine the height of the supporting surface of the positioning rod relative to the supporting surface of the lower crossbar. The worm and the positioning rod together form a cylindrical worm gear transmission system. By rotating the input end of the worm, the operator can adjust the position of the positioning rod through the cylindrical worm gear transmission system, thereby controlling the preset distance between the main rib to be welded and the main rib that has already been welded.

2. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The upper outer surface of the main rod is provided with a diamond-shaped concave anti-slip texture.

3. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The main rod has scale markings along its length on its surface for auxiliary positioning.

4. The simple adjustable rebar cage main reinforcement positioning tool according to claim 3, characterized in that, The scale markings are distributed at 30cm intervals to assist in locating the main reinforcing bars to be welded.

5. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The positioning rod is used to support the end of the main reinforcement bar to be welded. It has a straight shape so that it can be removed from the gap between the main reinforcement bars after welding is completed.

6. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The working surface of the worm gear is strengthened by at least one or a combination of heat treatment, precision grinding and honing processes to improve its hardness, wear resistance and transmission accuracy.

7. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The straight end of the positioning rod is provided with a trapezoidal positioning block, and the long side of the trapezoidal positioning block is provided with teeth that mesh with the worm gear.

8. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The lower crossbar has an inverted L-shaped groove at its end, and the inner wall of the groove is covered with a rubber anti-slip layer.

9. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The meshing part of the worm gear and the positioning rod is lubricated with a lubricant containing an anti-adhesion additive to improve transmission performance and durability.

10. The simple adjustable rebar cage main reinforcement positioning tool according to claim 1, characterized in that, The worm gear, the positioning rod, and the lower crossbar are made of carbon steel or alloy steel to ensure sufficient structural strength and wear resistance.

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