A reverse pull-out wire hook

Abstract

This invention belongs to the field of engineering construction technology, specifically relating to a reverse-pull-out type wire tying hook, comprising a sleeve with a matching pipe diameter and a hook body. The hook body is located inside the sleeve, and its outer surface has spiral grooves arranged along its length. A positioning screw is installed on the wall of the sleeve, the length of the screw's threaded portion being equal to the sleeve's wall thickness. The end of the screw's threaded portion is a concave hemispherical shape, and a steel ball is placed between the end of the threaded portion and the spiral groove. A push rod is fixedly connected to the outside of the sleeve, the axis of the push rod being parallel to the sleeve, and the end of the push rod extending forward a certain distance after passing the head of the wire tying hook. This invention allows the wire tying head to be formed inside the reinforcing steel skeleton, conforming to construction specifications.

Description

Technical Field

[0001] The invention relates to a reverse pull-out wire hook, which belongs to the field of engineering construction technology. Background Technology

[0002] Reinforcing bars are commonly placed inside the concrete of structures to enhance structural strength. These reinforcing bars are generally arranged in the form of a skeleton, with individual bars forming a whole through welding, binding, or other methods. Binding is usually done using binding wire.

[0003] The current "Technical Specification for Construction of Highway Bridges and Culverts" JTG / T 3650—2020" has the following requirements for rebar tying: Regarding the tying method, "tying should be done in an '8' shape with the direction of the wire changed point by point"; Regarding the treatment of wire ends, "the wire ends of the rebar should not enter the concrete cover".

[0004] The commonly used tool for tying reinforcing bars is the wire tying hook. However, the wire tying hooks currently in use cannot reach into the inside of the reinforcing bar structure for tying. The tying of the concrete reinforcing bar skeleton close to the outer surface of the concrete is usually done by a person standing on the outside. This results in the wire end protruding on the outside of the reinforcing bar skeleton, which actually violates the requirements of relevant technical specifications. Traditional wire tying hooks are difficult to place the wire end on the inside.

[0005] Furthermore, the length of binding wire used varies in different construction situations, while the number of loops in a traditional binding hook is fixed; that is, the number of rotations the hook makes after being pulled out of the sleeve is also fixed. When the binding wire is short and the number of loops is large, the wire is easily broken, resulting in a loss of binding effectiveness and requiring rework. Summary of the Invention

[0006] Based on the shortcomings of the existing technology, the technical problem to be solved by the invention is to provide a new type of wire tying hook that can be extended into the steel structure in the opposite direction for tying, and the number of tying turns is adjustable, which is convenient to use, has high tying efficiency, and can be widely used as a steel bar tying tool in reinforced concrete engineering.

[0007] The reverse pull-out wire tying hook of the invention includes a sleeve and a hook body with a matching pipe diameter. The hook body is located inside the sleeve, and the outer surface of the hook body is provided with a spiral groove arranged along its length. A positioning screw is installed on the wall of the sleeve. The length of the screw rod is equal to the wall thickness of the sleeve. The end of the screw rod is a concave hemispherical shape, and a steel ball is provided between the end of the screw rod and the spiral groove. A push rod is fixedly connected to the outside of the sleeve. The axis of the push rod is parallel to the sleeve, and the end of the push rod extends forward a certain distance after passing the head end of the wire tying hook.

[0008] The method of using this invention is as follows: First, position the reinforcing bars that need to be tied together. Hold the tie wire with your left hand and pass it through the intersection of the reinforcing bars. Hold the push rod of the tie wire hook with your right hand and hook the bend of the tie wire. Use both hands to connect the tie wires. Push the push rod into the inside of the reinforcing bar cage. The push rod and the sleeve move together, and the tie wire hook rotates to tie the tie wire, so that the tie wire head is formed inside the reinforcing bar cage, which meets the construction specifications.

[0009] Preferably, the push rod has a handle at its end for easy operation.

[0010] Furthermore, within the sleeve, the tail of the hook is rotatably connected to the sliding column. A sleeve limiting groove is formed on the sleeve wall along the length of the sleeve, and a sliding column limiting groove, matching the sleeve limiting groove, is formed within the sliding column along its length. A limiting screw with a nut enters from one side of the sleeve limiting groove, passes through the sliding column limiting groove, and exits from the other side of the sleeve limiting groove. The position of the limiting screw is adjustable. Adjusting the position of the limiting screw changes the movement distance of the hook and the sliding column. This serves two purposes: first, it prevents the hook from detaching from the sleeve; second, it allows for changing the number of rotations of the hook (since the number of rotations is related to the distance it travels).

[0011] Furthermore, an end cap is screwed onto the tail end of the sleeve, and a tension spring is provided between the sliding post and the end cap. The two ends of the tension spring are respectively fixed to the sliding post and the end cap. After the binding wire is completed, the tension spring can return the slid-out hook to its initial position without manual reset.

[0012] Specifically, the hook body has a mounting hole at its tail end, and a connecting screw is screwed onto the head end of the sliding column. The screw head is located inside the mounting hole, and thrust bearings are provided on both the front and rear sides of the screw head. A screw cap is installed at the opening of the mounting hole to seal the screw head and thrust bearings inside the mounting hole, which allows for smoother relative rotation between the hook body and the sliding column.

[0013] Preferably, the screw cap has a hole on its end face to facilitate assembly and disassembly using tools, thus simplifying assembly.

[0014] The beneficial effects of the invention compared to the prior art are:

[0015] 1. Social benefits:

[0016] In the engineering construction industry, the reverse pull-out wire hook proposed in this invention ensures that the wire end is located inside the rebar cage, preventing it from entering the concrete cover. This avoids the problem of water seepage channels forming due to the low wire cover, which can cause rebar corrosion. It plays a crucial role in improving the quality of the rebar cage binding and preventing the durability of concrete from being reduced due to rebar corrosion.

[0017] 2. Economic benefits:

[0018] Because rust expands in volume, it causes the concrete cover to crack, thus accelerating the re-corrosion of the reinforcing steel. This cycle repeats, gradually reducing the cross-sectional dimensions of the reinforcing steel and ultimately leading to a loss of load-bearing capacity. The structural concrete will eventually lose its function, resulting in high maintenance costs. Therefore, it is crucial to avoid the impact of exposed rebar wire ends on the structural integrity and its lifespan, which could lead to corrosion. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0020] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 This is the front view of the present invention;

[0022] Figure 4 This is the front view of the present invention;

[0023] Figure 5 This is a cross-sectional view of the present invention;

[0024] Figure 6 yes Figure 5 A magnified view of part A in the middle;

[0025] Figure 7 yes Figure 5 A magnified view of part B in the middle;

[0026] Figure 8 This is an exploded view of the present invention;

[0027] Figure 9 yes Figure 8 A magnified view of part C in the middle;

[0028] Figure 10 This is a schematic diagram of the sliding column.

[0029] In the diagram: 1. Sleeve; 2. Push rod; 3. Handle; 4. Hook body; 4.1. Spiral groove; 5. Positioning screw; 6. Sleeve limiting groove; 7. Limiting screw; 8. End cap; 9. Sliding column; 9.1. Sliding column limiting groove; 10. Tension spring; 11. Steel ball; 12. Thrust bearing; 13. Connecting screw; 14. Screw cap; 14.1. Hole. Detailed Implementation

[0030] The invention will be further described below with reference to specific embodiments.

[0031] However, the description of the invention is merely an example of a structural or even functional description, and the scope of the invention is not limited by the examples described herein.

[0032] For example, multiple embodiments may have various modifications and forms, and it should be understood that the scope of the invention includes equivalents that can realize the technical idea.

[0033] like Figures 1-10 As shown, this embodiment is achieved through the following technical solution: It includes a sleeve 1 with a pipe diameter matching and a hook body 4. The hook body 4 is located inside the sleeve 1, and its outer surface has a spiral groove 4.1 arranged along its length. A positioning screw 5 is installed on the wall of the sleeve 1. The length of the lead screw portion of the positioning screw 5 is equal to the wall thickness of the sleeve 1, and the end of the lead screw 5 is a concave hemispherical shape. A steel ball 11 is provided between the end of the lead screw and the spiral groove 4.1. This embodiment has two sets of steel ball devices, which allow for smoother relative movement between the sleeve 1 and the hook body 4.

[0034] A push rod 2 is fixedly connected to the outside of the sleeve 1. The axis of the push rod 2 is parallel to that of the sleeve 1. The end of the push rod 2 extends forward a certain distance after passing the head of the wire hook. A handle 3 is provided at the end of the push rod 2. In this embodiment, the push rod 2 can be designed as a telescopic sleeve, so that its length can be adjusted.

[0035] Inside the sleeve 1, the tail of the hook 4 is rotatably connected to the sliding column 9. A sleeve limiting groove 6 is formed on the wall of the sleeve 1 along its length. A sliding column limiting groove 9.1, matching the sleeve limiting groove 6, is formed inside the sliding column 9 along its length. A limiting screw 7 with a nut enters from one side of the sleeve limiting groove 6, passes through the sliding column limiting groove 9.1, and exits from the other side of the sleeve limiting groove 6. The position of the limiting screw 7 is adjustable. Adjusting the position of the limiting screw 7 changes the movement distance of the hook 4 and the sliding column 9. This serves two purposes: first, it prevents the hook 4 from detaching from the sleeve 1; second, it changes the number of rotations of the hook 4 (because the number of rotations of the hook 4 is related to the distance it moves).

[0036] An end cap 8 is screwed onto the tail end of the sleeve 1. A tension spring 10 is provided between the slide pin 9 and the end cap 8, with both ends of the tension spring 10 fixed to the slide pin 9 and the end cap 8, respectively. After the binding wire is completed, the tension spring 10 can pull the slid-out hook 4 back to its initial position without requiring manual reset.

[0037] The hook body 4 has a mounting hole at its tail end, and the sliding column 9 has a connecting screw 13 screwed into its head end. The screw head of the connecting screw 13 is located in the mounting hole. Thrust bearings 12 are provided on both the front and rear sides of the screw head. The opening of the mounting hole is fitted with a screw cap 14 that can seal the screw head and the thrust bearing 12 in the mounting hole. The end face of the screw cap 14 has a hole 14.1, which facilitates assembly and disassembly using tools.

[0038] In use, first position the reinforcing bars that need to be tied together. Hold the binding wire in your left hand and thread it through the intersection of the reinforcing bars. Hold the push rod 2 of the binding hook in your right hand, hooking the hook head onto the bend of the binding wire. Use both hands to connect the binding wires. Push the push rod 2 towards the inside of the reinforcing bar cage. The push rod 2, along with the sleeve 1, moves together, causing the hook body 4 to rotate and tie the binding wire, ensuring the binding wire head is inside the reinforcing bar cage, conforming to construction specifications. Adjusting the position of the limit screw 7 changes the movement distance of the hook body 4 and the sliding column 9, thus changing the number of rotations of the hook body 4 and preventing excessive rotation from breaking the binding wire.

[0039] In this embodiment, the hook of the reverse pull-out wire tying hook faces the operator's side, which can achieve reverse binding. The length of the handle can be made according to the actual space on site. The end of the handle is close to the head of the hook, so the hand holding the handle can also position the wire.

[0040] Of course, the above description is merely a preferred embodiment of the invention and should not be considered as limiting the scope of the invention. The invention is not limited to the examples described above, and all equivalent changes and improvements made by those skilled in the art within the scope of the invention should fall within the patent coverage of the invention.

Claims

1. A reverse-pull wire hook, characterized in that, Includes a sleeve (1) and a hook (4) with a pipe diameter matching. The hook (4) is located inside the sleeve (1), and the outer surface of the hook (4) is provided with a spiral groove (4.1) arranged along its length. A positioning screw (5) is installed on the wall of the sleeve (1). The length of the screw rod of the positioning screw (5) is equal to the wall thickness of the sleeve (1). The end of the screw rod of the positioning screw (5) is a concave hemispherical shape. A steel ball (11) is provided between the end of the screw rod and the spiral groove (4.1). A push rod (2) is fixedly connected to the outside of the sleeve (1). The axis of the push rod (2) is parallel to the sleeve (1). The end of the push rod (2) extends forward a distance after passing the head of the wire hook. Inside the sleeve (1), the tail of the hook (4) is rotatably connected to the slide column (9). A sleeve limiting groove (6) is provided on the wall of the sleeve (1) along the length direction of the sleeve (1). A slide column limiting groove (9.1) that matches the sleeve limiting groove (6) is provided inside the slide column (9). The slide column limiting groove (9.1) is provided along the length direction of the slide column (9). A limiting screw (7) with a nut enters from the sleeve limiting groove (6) on one side, passes through the slide column limiting groove (9.1), and exits from the sleeve limiting groove (6) on the other side. The position of the limiting screw (7) is adjustable.

2. The reverse pull-out wire hook according to claim 1, characterized in that, The push rod (2) is provided with a handle (3) at its end.

3. The reverse pull-out wire hook according to claim 1, characterized in that, The sleeve (1) is screwed with an end cap (8) at the tail end. A tension spring (10) is provided between the slide (9) and the end cap (8). The two ends of the tension spring (10) are fixed on the slide (9) and the end cap (8) respectively.

4. The reverse pull-out wire hook according to claim 1 or 3, characterized in that, The hook body (4) has an installation hole at its tail end, and a connecting screw (13) is screwed onto the head end of the sliding column (9). The screw head of the connecting screw (13) is located in the installation hole. Thrust bearings (12) are provided on both the front and rear sides of the screw head. The opening of the installation hole is fitted with a screw cap (14) that can seal the screw head and the thrust bearing (12) in the installation hole.

5. The reverse pull-out wire hook according to claim 4, characterized in that, The screw cap (14) has a hole (14.1) on its end face.

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