Detachable lifting point for building prefabricated components

Abstract

The detachable lifting point for building prefabricated components is composed of a lifting box, a plastic protective cover and a lifting hook. The lifting box is installed at the predetermined position of the prefabricated component through the steel bars and is embedded in the concrete. After being transported to the construction site, the plastic protective cover is removed, the lifting hook is installed on the steel bar, the lifting hook is pressed down to separate from the steel bar after being lifted to the designated position, and then the lifting hook is rotated to be detached and recycled. The overall structure is modularized, easy to install and small in size. The lifting hook part can be recycled and reused, and the transportation and storage will not affect each other. The device can be stored and transported more safely, which not only improves the damage, safety hazards and over-thickness of cast-in-place layer of the lifting part on the building prefabricated components, but also greatly improves the utilization rate of resources.

Description

Technical Field

[0001] This utility model relates to a detachable lifting point for prefabricated building components, specifically a detachable lifting point for prefabricated building components. Background Technology

[0002] In current construction, the lifting components of precast building parts often protrude above the components. When multiple layers of components are transported and stacked together, the protruding metal hooks of the lifting components can easily damage the bottom concrete of the upper components, causing concrete cracking and compromising structural stability. The upward protrusion of the metal hooks also necessitates a thicker cast-in-place protective layer during on-site construction, increasing building costs. Summary of the Invention

[0003] The purpose of this utility model is to provide a detachable lifting point for prefabricated building components. The detachable lifting point for prefabricated building components is formed by setting a lifting box, a plastic protective cover, and a lifting hook. During the multi-layer storage and transportation of the components, the metal hook is hidden inside the components. After the prefabricated building components are lifted to the installation position, the metal hook can be removed, which solves the problem of the existing technology where the lifting parts protrude from the prefabricated building components.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a detachable lifting point for prefabricated building components includes a lifting box, which is rectangular in shape with an opening at one end. A matching plastic protective cover is installed on the lifting box, which can close the opening of the lifting box. Two sets of through holes are opened on two opposite sides of the lifting box, and the two sets of through holes on each side are corresponding in position and at the same horizontal height. A lifting hook is installed inside the lifting box. One end of the lifting hook is an inverted U-shaped metal rod, and the straight metal rods on both sides of the inverted U-shaped metal rod are parallel to each other. The ends of the straight metal rods at both ends are provided with U-shaped hooks that bend outwards. Hanging rings are installed on the outer wall of the lifting box and near each through hole. Several protrusions are provided on the two side walls of the lifting box without through holes, and the protrusions on the two side walls are symmetrically arranged. A hook is installed on the inside of the plastic protective cover, and the hook can hold the inverted U-shaped metal rod of the lifting hook.

[0005] The positive effects of this utility model are as follows: The detachable lifting point for precast building components described in this utility model consists of a lifting box, a plastic protective cover, and a hook. The lifting box is installed at predetermined positions on the precast component via reinforcing bars and is embedded inside the concrete. After transportation to the construction site, the plastic protective cover is removed, the hook is installed on the reinforcing bars, and after lifting to the designated position, the hook is pressed down to separate it from the reinforcing bars. Then, the hook is rotated to disassemble and recycle it. The overall structure is modular, easy to install, and small in size. The hook part can also be recycled and reused, and there is no mutual interference during transportation and storage. Using this device allows for safer storage and transportation, not only improving the damage to precast building components caused by lifting components, reducing safety hazards, and addressing the issue of excessively thick cast-in-place layers, but also greatly improving resource utilization. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 yes Figure 2 Middle left view; Figure 4 yes Figure 2 Mid-top view; Figure 5 yes Figure 2 Enlarged view of the sectional view along the AA direction; Figure 6 yes Figure 5 A schematic diagram showing the state of the structure after the steel reinforcement has been installed. Figure 7 This is a diagram showing the state after the plastic protective cover has been removed; Figure 8 yes Figure 7 Enlarged view of the sectional view along the BB direction; Figure 9 This is a schematic diagram showing the state of the hook being installed on the reinforcing bar; Figure 10 This is a sectional view of the internal structure of the hook being installed on the reinforcing steel. Figure 11 This is a cross-sectional view of the internal structure of the hook detached from the reinforcing steel. Figure 12 This is a schematic diagram showing the state of the hook rotating between the reinforcing bars; Figure 13 This is a schematic diagram showing the state of the present invention installed on a prefabricated component; Figure 14 This is a schematic diagram showing the state of the prefabricated component during hoisting of this utility model. Detailed Implementation

[0007] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these examples. Any improvements made without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

[0008] like Figure 1 As shown, a detachable lifting point for precast building components includes a lifting box 1, which is rectangular in shape with an opening at one end. A matching plastic protective cover 2 is installed on the lifting box 1, which can close the opening of the lifting box 1 and effectively reduce the thickness of the cast-in-place layer. Two sets of through holes 3 are provided on two opposite sides of the lifting box 1, and the two sets of through holes 3 on each side are correspondingly positioned and at the same horizontal height. The lifting box 1 is installed on the reinforcing steel through the through holes 3, and a lifting hook 4 is installed inside the lifting box 1.

[0009] One end of the hook 4 is an inverted U-shaped metal rod 5, which can be connected to a tower crane hook or other lifting equipment. The straight metal rods on both sides of the inverted U-shaped metal rod (5) are parallel to each other, and each of the straight metal rods at both ends is provided with an outwardly bent U-shaped hook 6. The U-shaped hook 6 can hook the steel bar during use to ensure the overall stability of the hook 4. When disassembling, press down the inverted U-shaped metal rod 5 to disengage its U-shaped hook 6 from the steel bar, and then rotate the hook 4 ninety degrees to rotate the U-shaped hook 6 at both ends of the inverted U-shaped metal rod 5 into the gap between the two steel bars, so that the hook 4 can be moved upward as a whole, thereby detaching from the lifting box 1.

[0010] Furthermore, hanging rings 7 are installed on the outer wall of the hoisting box 1 and near each through hole (3). After passing a wire through each hanging ring 7, the two ends of the wire are rotated and tightened above the reinforcing bar, fixing the two ends of the hoisting box 1 to the reinforcing bar, thus limiting the movement of the hoisting box 1. During concrete pouring, the hoisting box 1 can be kept in the predetermined position and the pouring can be completed.

[0011] Furthermore, the two side walls of the hoisting box 1 without through holes 3 may be provided with several protrusions 8, which are symmetrically arranged on both side walls. During concrete pouring, this prevents the hoisting box 1 from floating in the concrete, and at the same time ensures that after pouring, the protrusions 8 increase the contact area between the hoisting box 1 and the concrete, making the hoisting box 1 more stable as a whole.

[0012] Furthermore, a hook 9 can be installed on the inner side of the plastic protective cover 2, which can hold the inverted U-shaped metal rod (5) of the hook 4. While removing the plastic protective cover 2, the hook 4 can be moved upward by the hook 9, so that the hook 4 can be installed on the steel bar. By removing the plastic protective cover 2, the hook 4 can be installed quickly, reducing the installation steps and increasing the installation speed.

[0013] Before pouring the precast components, the lifting box 1 is installed onto the reinforcing steel through the through hole 3 and adjusted to the predetermined position. The hook 4 is then installed on the hook 9 at the bottom of the plastic protective cover 2. The plastic protective cover 2 is then installed at the opening at the top of the lifting box 1, ensuring that the top surface of the plastic protective cover 2 is level with the top surface of the lifting box 1 and is flat. This prevents uneven concrete filling caused by handles or grooves, allowing for better leveling. The hanging rings 7, fixed at both ends of the lifting box 1, are secured to the reinforcing steel with wire to ensure the stability of the lifting box 1 during pouring. After pouring, the precast components can be moved by lifting them from the bottom using a forklift during storage. After loading and transporting to the hoisting location, the plastic protective cover 2 is opened or pried open while the hook 4 is moved upward, so that the U-shaped hook 6 engages with the steel bar, and the hook 4 is fixed to the steel bar to complete the installation. Then, a tower crane or lifting equipment is used to transport the prefabricated component to the designated position. The lifting equipment is then disengaged and the hook 4 is pressed down to separate the U-shaped hook 6 from the steel bar. After rotating the hook 4 ninety degrees upward, the hook 4 can be removed. Then, concrete is poured into the hoisting box 1 to complete the installation.

[0014] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A detachable lifting point for prefabricated building components, characterized in that: The device includes a lifting box (1), which is rectangular in shape and has an opening at one end. A matching plastic protective cover (2) is installed on the lifting box (1), which can close the opening of the lifting box (1). Two sets of through holes (3) are provided on two opposite sides of the lifting box (1). The two sets of through holes (3) on each side are in the same position and are at the same horizontal height. A hook (4) is installed inside the lifting box (1). One end of the hook (4) is an inverted U-shaped metal rod (5). The straight metal rods on both sides of the inverted U-shaped metal rod (5) are parallel to each other, and the ends of the straight metal rods at both ends are provided with U-shaped hooks (6) that bend outward.

2. The detachable lifting point for prefabricated building components according to claim 1, characterized in that: Hanging rings (7) are installed on the outer wall of the hoisting box (1) and near each through hole (3).

3. The detachable lifting point for prefabricated building components according to claim 1, characterized in that: The hoisting box (1) has several protrusions (8) on its two side walls without through holes (3), and the protrusions (8) on the two side walls are arranged symmetrically to each other.

4. A detachable lifting point for prefabricated building components according to claim 1, characterized in that: The plastic protective cover (2) has a hook (9) installed on the inside, which can hold the inverted U-shaped metal rod (5) of the hook (4).

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