Embedded steel bar dismantling puller used for side formwork installation

Abstract

The utility model relates to the technical field of hardware tools, in particular to an embedded steel bar dismantling puller for side mold installation, which comprises a handle, a U-shaped seat fixedly connected to the end part of the handle, a rotating shaft rotationally connected between two side plates of the U-shaped seat, a connecting rod welded in the middle of the rotating shaft and extending outwards, and a bar pulling assembly welded to the end part of the connecting rod, a supporting block is fixedly connected to the bottom of the end, close to the U-shaped base, of the handle. According to the device, the difficulty of pulling out the side formwork inclined strut embedded steel bars can be greatly reduced, the pulling efficiency is improved, the embedded steel bars are protected in the pulling process, and the embedded steel bars can be recycled.

Description

Technical Field

[0001] This invention relates to the field of hardware tools technology, specifically to a rebar removal and pulling tool for side formwork installation. Background Technology

[0002] When pouring concrete structures on concrete floors or foundations, side formwork is required. The lateral support and reinforcement system typically involves reinforcing bars embedded in the concrete floor or foundation. These reinforcing bars act as diagonal braces for the side formwork, serving as load-bearing fulcrums and preventing formwork displacement. After concrete pouring is complete, the formwork must be removed, and the reinforcing bars extracted. However, manual extraction is difficult, time-consuming, and inefficient due to a lack of specialized tools. To improve work efficiency and reduce the difficulty of manual labor, a specially designed rebar nail puller has been developed. Utility Model Content

[0003] This invention provides a rebar removal tool for side formwork installation, aiming to solve the problem of quickly removing rebars used as diagonal supports in formwork. Its main features are simple structure, speed and efficiency, and reusability. It is suitable for removing rebars used as load-bearing points for diagonal supports during side formwork installation when pouring concrete on concrete floors or foundation layers. It is easy and efficient to use, saving labor and time, and will not damage the rebars. The rebars can also be reused.

[0004] To achieve the above objectives, the technical solution of this invention is as follows:

[0005] A rebar removal and pulling device for side formwork installation includes a handle, a U-shaped seat fixedly connected to the end of the handle, a rotating shaft rotatably connected between two side plates of the U-shaped seat, a connecting rod welded to the middle of the rotating shaft and extending outward, and a rebar pulling assembly welded to the end of the connecting rod. A support block is fixedly connected to the bottom of the handle near the U-shaped seat.

[0006] Preferably, the reinforcing bar assembly includes a steel ring, one end of which is welded to the end of the connecting rod.

[0007] Preferably, the tendon-pulling assembly includes a cuboid-shaped fixing block, wherein the fixing block has an elliptical hole penetrating the upper and lower end faces.

[0008] Preferably, the inner wall of the inner hole or elliptical hole of the steel ring is provided with a nitrile wear-resistant rubber layer.

[0009] Preferably, one end of the fixing block is welded to the end of the connecting rod, and the bottom end of the fixing block away from the connecting rod is also provided with a mounting plate, on which rollers are mounted.

[0010] Preferably, the sidewall of the fixing block is also connected to an auxiliary rib-pulling component that extends into the elliptical hole.

[0011] Preferably, the auxiliary rebar removal assembly includes a push plate, a slide rod, and a compression spring. The fixing block has a sliding hole that penetrates the inner wall of the elliptical hole and the outer wall of the fixing block. The sliding hole is located on the side away from the connecting rod. A slide rod is slidably fitted inside the sliding hole. The inner end of the slide rod is connected to the push plate. A compression spring is sleeved between the inner end of the slide rod and the inner wall of the elliptical hole and located on the outer side of the slide rod. The two ends of the compression spring are fixedly connected to the inner wall of the elliptical hole and the end of the slide rod, respectively. The push plate is used in conjunction with the rebar to be removed.

[0012] Preferably, the push plate is an arc-shaped plate, and the back of the arc-shaped plate is hinged to the end of the slide rod.

[0013] Preferably, a limiting block is provided at the outer end of the slide rod.

[0014] This novel rebar removal and extraction tool for side formwork installation has the following beneficial effects:

[0015] This new type of rebar can significantly reduce the difficulty of pulling out the reinforcing bars of the side formwork and diagonal bracing, improve the extraction efficiency, and provide protection for the rebar during the extraction process. The rebar can be reused. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the basic structure of this novel invention.

[0017] Figure 2 This is a partially enlarged cross-sectional view (top view) of one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram illustrating the operating principle of one embodiment of the present invention.

[0019] Figure 4 This is a top view of the structure of this novel steel ring.

[0020] Figure 5 This is a partial top view of another embodiment of the present invention.

[0021] Figure 6 This is a partial frontal structural cross-sectional view of another embodiment of the present invention.

[0022] Figure 7 This is a partial front structural cross-sectional view of a further embodiment of the present invention.

[0023] The markings in the diagram are: 1. Handle; 2. Support block; 3. U-shaped seat; 4. Rotating shaft; 5. Steel ring; 51. Nitrile wear-resistant rubber layer A; 6. Connecting rod; 7. Reinforcing bar; 8. Concrete surface (ground); 9. Handle rotation direction; 10. Fixing block; 101. Oval hole; 102. Nitrile wear-resistant rubber layer B; 103. Roller; 104. Sliding hole; 105. Sliding rod; 106. Push plate; 107. Compression spring; 108. Limiting block.

[0024] It should be noted that the above figures are all schematic diagrams and the size ratios between the various structures of this invention should not be understood based on the scale relationships shown in the figures. The actual size ratios should be set as needed. Detailed Implementation

[0025] The following is a detailed description of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this invention.

[0027] This invention relates to a rebar removal and pulling device for side formwork installation, such as... Figures 1-3 As shown, it includes a handle 1, a U-shaped seat 3 fixedly connected to the end of the handle 1, a rotating shaft 4 rotatably connected between the two side plates of the U-shaped seat 3, a connecting rod 6 welded to the middle of the rotating shaft 4 and extending outward, and a reinforcing bar assembly welded to the end of the connecting rod 6. A support block 2 is fixedly connected to the bottom of the handle 1 near the U-shaped seat 3.

[0028] In this embodiment, as Figures 1-4 As shown, the rib-pulling assembly includes a steel ring 5, one end of which is welded to the end of the connecting rod 6. Figure 3 When pulling out the reinforcing bar, simply put the steel ring 5 onto the reinforcing bar 7, make the support block abut against the ground on the inclined side of the reinforcing bar, and then press down the handle. The reinforcing bar can be loosened by prying it through the inner wall of one side of the steel ring, and then the reinforcing bar can be pulled out.

[0029] In this embodiment, as Figure 1 , 5As shown, the rebar pulling assembly includes a cuboid-shaped fixing block 10, which has an elliptical hole 101 extending through its upper and lower end faces. The elliptical hole increases the contact area with the rebar surface (theoretically, when the circular hole of the steel ring is tangent to the outer wall of the rebar 7, it is a line contact, while the contact area between the elliptical hole and the rebar surface can be significantly increased), thus avoiding localized stress concentration.

[0030] In this embodiment, as Figure 1 , 5 As shown in Figures 6 and 7, the inner wall of the inner hole of the steel ring 5 or the elliptical hole 101 is provided with a nitrile wear-resistant rubber layer (51, 102), which provides protection for the surface texture of the steel bar while pulling out the steel bar.

[0031] In this embodiment, as Figure 1 , 5 As shown in Figure 6, one end of the fixing block 10 is welded to the end of the connecting rod 6, and the bottom end of the fixing block 10 away from the connecting rod 6 is also provided with a mounting plate, on which a roller 103 is mounted. When prying the reinforcing bar, the roller 103 slides adaptively on the ground, so that both ends of the fixing block are subjected to force, and the roller becomes a fulcrum for movement. Thus, the support block 2 and the roller 103 form two fulcrums, making the force of pulling the reinforcing bar more stable and controllable.

[0032] In this embodiment, as Figure 1 , 5 As shown in Figures 6 and 7, the sidewall of the fixing block 10 is also connected to an auxiliary rib-pulling assembly that extends into the elliptical hole.

[0033] In this embodiment, as Figure 1 , 5 As shown in Figures 6 and 7, the auxiliary rebar removal assembly includes a push plate 106, a slide rod 105, and a compression spring 107. The fixing block 10 is provided with a sliding hole 104 that passes through the inner wall of the elliptical hole and the outer wall of the fixing block. The sliding hole 104 is located on the side away from the connecting rod 6. The slide rod 105 is slidably fitted inside the sliding hole 104. The inner end of the slide rod 105 is connected to the push plate 106. A compression spring 107 is sleeved between the inner end of the slide rod 105 and the inner wall of the elliptical hole and located on the outer side of the slide rod. The two ends of the compression spring 107 are fixedly connected to the inner wall of the elliptical hole and the end of the slide rod, respectively. The push plate 106 is used in conjunction with the rebar 7 to be removed.

[0034] like Figure 7 As shown, the push plate 106 is an arc-shaped plate, and the back of the arc-shaped plate is hinged to the end of the slide rod. The arc-shaped plate can play a limiting role to prevent the push plate and the reinforcing bar from being misaligned.

[0035] like Figure 7 As shown, a limiting block 108 is provided at the outer end of the slide bar 105.

[0036] In this embodiment, when the connecting rod is lifted upward by the prying of the handle, it drives one end of the elliptical hole to move upward, thereby subjecting the reinforcing bar to an upward force and achieving the effect of prying the reinforcing bar. During this process, the compression spring contracts. When the handle is lifted and the connecting rod falls, the end of the elliptical hole that is in contact with the reinforcing bar leaves the reinforcing bar. The compression spring rebounds due to its elasticity, and applies a reverse thrust to the reinforcing bar through the push plate, further assisting in loosening the concrete at the bottom of the reinforcing bar, thereby effectively accelerating the efficiency of reinforcing bar extraction.

Claims

1. A rebar removal and pulling device for side formwork installation, characterized in that: it includes a handle, a U-shaped seat fixedly connected to the end of the handle, a rotating shaft rotatably connected between two side plates of the U-shaped seat, a connecting rod welded to the middle of the rotating shaft and extending outward, and a rebar pulling assembly welded to the end of the connecting rod, wherein a support block is fixedly connected to the bottom of the handle near the U-shaped seat.

2. The rebar removal and pulling tool for side formwork installation as described in claim 1, characterized in that: The aforementioned tendon-pulling assembly includes a steel ring, one end of which is welded to the end of a connecting rod.

3. The rebar removal and pulling tool for side formwork installation as described in claim 2, characterized in that: The aforementioned tendon-pulling assembly includes a cuboid-shaped fixing block, which has an elliptical hole penetrating its upper and lower end faces.

4. The rebar removal and pulling tool for side formwork installation as described in claim 3, characterized in that: The inner wall of the steel ring's inner hole or elliptical hole is provided with a nitrile wear-resistant rubber layer.

5. A rebar removal and pulling tool for side formwork installation as described in claim 4, characterized in that: One end of the fixing block is welded to the end of the connecting rod, and the bottom of the fixing block away from the connecting rod is also provided with a mounting plate, on which rollers are mounted.

6. The rebar removal and pulling tool for side formwork installation as described in claim 5, characterized in that: The sidewall of the fixing block is also connected to an auxiliary rib-pulling assembly that extends into the elliptical hole.

7. A rebar removal and pulling tool for side formwork installation as described in claim 6, characterized in that: The auxiliary rebar removal assembly includes a push plate, a slide rod, and a compression spring. The fixing block has a sliding hole that penetrates the inner wall of the elliptical hole and the outer wall of the fixing block. The sliding hole is located on the side away from the connecting rod. A slide rod is slidably fitted inside the sliding hole. The inner end of the slide rod is connected to the push plate. A compression spring is fitted between the inner end of the slide rod and the inner wall of the elliptical hole and on the outer side of the slide rod. The two ends of the compression spring are fixedly connected to the inner wall of the elliptical hole and the end of the slide rod, respectively. The push plate is used in conjunction with the rebar to be removed.

8. A rebar removal and pulling tool for side formwork installation as described in claim 7, characterized in that: The push plate is an arc-shaped plate, and the back of the arc-shaped plate is hinged to the end of the slide rod.

9. A rebar removal and pulling tool for side formwork installation as described in claim 8, characterized in that: The outer end of the slide bar is provided with a limiting block.

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