Auxiliary devices for installing steel reinforcement cages of frame beams

Abstract

This utility model discloses an auxiliary device for installing a steel reinforcement cage for a frame beam, relating to the field of building construction. The device includes multiple gantry frames spaced apart along the beam, each frame consisting of a top crossbeam and columns. A manual lifting mechanism is connected below the top crossbeam, and multiple supporting connectors are provided on the sides of the columns, with horizontal crossbars passing through these connectors. During construction, the steel reinforcement cage is suspended by the manual lifting mechanism and stabilized by the horizontal crossbars from below. Synchronous operation of the manual lifting mechanism ensures the cage is lowered smoothly, accurately, and controllably into position. This utility model solves the technical problems of inaccurate positioning, large swaying, and high safety hazards associated with traditional hoisting methods for steel reinforcement cages, offering advantages such as safety, precision, efficiency, and strong adaptability.

Description

Technical Field

[0001] This utility model relates to an auxiliary device for installing the steel reinforcement cage of a frame beam, belonging to the field of building construction technology. Background Technology

[0002] In building construction, the installation of the reinforcing steel cage for frame beams is a crucial and complex process. Traditional installation methods typically involve using a tower crane or truck crane to lift the pre-tied reinforcing steel cage to the beam location and then directly placing it into the formwork. However, this method has several problems: Low positioning accuracy: The skeleton is prone to shaking and twisting during the lowering process, making it difficult to accurately control its final position in the formwork, which makes it difficult to guarantee indicators such as the thickness and spacing of the steel reinforcement protective layer.

[0003] Significant safety hazards: The large frame is heavy and has poor stability when suspended, posing a risk of detachment and overturning, which threatens workers below.

[0004] Low construction efficiency: It requires repeated adjustments to get it in place, which takes a long time and requires a high degree of cooperation from the crane operators.

[0005] Due to space constraints: In areas where hoisting equipment cannot fully cover or where the operating space is limited, construction is extremely difficult.

[0006] Therefore, there is an urgent need for an auxiliary installation device that can achieve stable, precise, and safe placement of the steel reinforcement cage. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an auxiliary device for the installation of steel reinforcement cages for frame beams. This device can effectively solve the problems of easy shaking, difficult positioning, and great safety hazards when hoisting and positioning large steel reinforcement cages, and realize the stable, accurate and controllable lowering of the cage.

[0008] This utility model is achieved through the following scheme: an auxiliary device for installing the steel reinforcement cage of a frame beam, comprising multiple gantry frames spaced apart along the beam position, each gantry frame including a top crossbeam and two columns, the top crossbeam being mounted on the top of the two columns; at least one manual lifting mechanism is connected below the top crossbeam; multiple supporting connectors are provided on the side of each column along its height direction, and horizontal crossbars are detachably threaded through the supporting connectors, the horizontal crossbars supporting the steel reinforcement cage, and a bottom support block is provided below the steel reinforcement cage, the bottom support block being mounted on the beam position.

[0009] The top beam is made of channel steel, the column is made of angle steel, and the manual lifting mechanism is a hand-operated hoist.

[0010] The supporting connector is a horizontally arranged sleeve, welded or fixed to the side of the angle steel by bolts; the horizontal crossbar is a steel bar or round steel.

[0011] The number of sleeves provided on the side of each angle steel column is 8-12, and they are evenly distributed along the height direction.

[0012] Multiple gantry frames are arranged at intervals of 1.2m-1.8m along the length of the beam.

[0013] The bottom of the column is connected to a base, which is a rectangular steel plate.

[0014] The beneficial effects of this utility model are as follows: 1. The weight of the steel reinforcement cage is primarily borne by the manual lifting mechanism, with the bottom crossbar serving only as an auxiliary stabilizer and temporary support. By simultaneously operating multiple manual lifting mechanisms, the cage can be lowered to the millimeter level, completely avoiding the sudden drops and swaying of traditional hoisting methods and greatly improving operational safety.

[0015] 2. The frame is under multi-point control throughout the lowering process, effectively preventing twisting and displacement. Operators can observe its relative position to the template in real time as the frame slowly sinks and make fine adjustments to ensure precise positioning on the first attempt.

[0016] 3. It eliminates the tedious process of repeated lifting and adjustment, simplifies the construction process, significantly shortens the installation time, and reduces the heavy reliance on large lifting equipment.

[0017] 4. The device has a simple structure and can be modularly assembled. It can adapt to the construction of frame beams with different spans and heights, and is especially suitable for working conditions where the lifting equipment has blind spots or the operating space is limited.

[0018] 5. The main components (channel steel, angle steel, hand chain hoist, and reinforcing steel) are all common materials or tools found on construction sites, resulting in low modification costs and easy promotion. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the auxiliary device for installing the steel reinforcement cage of the frame beam according to this utility model.

[0020] Figure 2 This is a front view structural diagram of the auxiliary device for installing the steel reinforcement cage of the frame beam according to this utility model.

[0021] In the diagram: 100-gantry, 101-top beam, 102-column, 200-manual lifting mechanism (hand chain hoist), 300-supporting connector (sleeve), 301-horizontal crossbar, 400-steel frame, 500-bottom support block, 600-base. Detailed Implementation

[0022] The following is combined with Figure 1-2 The present invention will be further described below, but the scope of protection of the present invention is not limited to the contents described herein.

[0023] Example 1 Reference Figure 1 and Figure 2 The auxiliary device for installing the steel reinforcement cage of the frame beam includes multiple gantry frames 100 spaced apart along the beam position. Each gantry frame 100 includes a top crossbeam 101 and two columns 102. The top crossbeam 101 is mounted on the top of the two columns 102. At least one manual lifting mechanism 200 is connected to the bottom of the top crossbeam 101. Multiple supporting connectors 300 are provided on the side of each column 102 along its height direction. Horizontal crossbars 301 are detachably passed through the supporting connectors 300. The horizontal crossbars 301 support the steel reinforcement cage 400. A bottom support block 500 is located below the steel reinforcement cage 400 and is mounted on the beam position.

[0024] The construction steps are as follows: 1. On-site preparation and positioning: On the work surface where the floor slab formwork has been laid, install control lines are marked on both sides of the beam according to the design position of the frame beam.

[0025] Along the length of the beam, at intervals of 1.5 meters (this value is within the preferred range in this embodiment), the installation points of each gantry 100 are precisely marked on the control line.

[0026] The pre-welded gantry 100 (composed of [16 channel steel as the top crossbeam 101 and L75×6 angle steel as the column 102]) is hoisted to each position. The rectangular steel plate base 500 at its bottom contacts the template surface. It is initially adjusted with shims to ensure that the verticality deviation of the gantry is less than 3 mm / m. It is then fixed with expansion bolts or temporarily connected to the template support system to ensure its overall stability.

[0027] 2. Installation of the lifting mechanism: On the top channel steel 101 of each gantry 100, install a 3-ton rated load hand chain hoist 200 using a special bracket or shackle. Synchronously adjust the hooks of all hand chain hoists 200 to the same preset height (usually slightly higher than the design beam top elevation) and ensure that the hooks move freely.

[0028] 3. Pre-lifting and positioning of the reinforcing steel cage: In the ground steel reinforcement processing area, the main reinforcement bars, stirrups, and web reinforcement bars of the frame beam are tied according to the drawings to form a complete steel reinforcement skeleton 400.

[0029] The entire steel frame was lifted 400mm using a tower crane and placed directly above the installation location before being slowly lowered.

[0030] Ground and scaffold workers work together to reliably connect the four (or more) pre-set main lifting points on the top of the frame 400 to the hooks of the corresponding hand-operated hoists 200 on the gantry.

[0031] After all lifting points are connected, operate the hand chain hoist 200 to slowly tighten the chain, so that the weight of the frame 400 is completely transferred to the hand chain hoist 200, and the tower crane is released and removed.

[0032] 4. Stability and fine-tuning support: Observe the stability of the frame 400 and the design requirements for the protective layer thickness, and select two rows of symmetrical sleeves 300 on the column 102, located about 5-10 cm below the bottom of the frame.

[0033] Two φ25 round steel bars, longer than the beam width (serving as horizontal crossbars 301), are passed through the selected sleeves 300 from both sides, gently supporting the bottom main reinforcement or pads of the frame 400. At this time, the crossbars 301 mainly serve as safety and anti-lateral stability, while the main load is still borne by the hand-operated hoist 200.

[0034] 5. Synchronous deployment and precise positioning: Designate a full-time commander to issue commands using a walkie-talkie.

[0035] Several operators took their positions at the various gantry locations, first pulling out the bottom support block 500, and then, upon command, releasing the hand chain hoist 200 synchronously, slowly, and with small amplitude (pulling the sprocket 1-2 teeth each time). The steel frame 400 then sank smoothly, and the crossbar 301 moved down synchronously within the sleeve 300.

[0036] During the lowering process, the commander and surveyor monitored the relative position of the 400-meter frame and the beam formwork below throughout. If a slight deviation occurred, it could be corrected in real time by adjusting the lowering speed of a single or adjacent chain hoist.

[0037] When the frame 400 descends to approximately 2-3 centimeters from the bottom of the formwork, the descent is paused for a final position check. After confirmation, the frame continues to descend synchronously until the pre-placed concrete protective layer blocks on the frame 400 fully contact the bottom of the formwork. At this point, the frame is precisely in place.

[0038] 6. Equipment dismantling and relocation: After the frame is in place and passes inspection, remove the horizontal bar 301 and completely release the hand chain hoist 200 to detach the hook from the frame.

[0039] Remove the manual chain hoist 200 and lift the entire gantry 100 away for reuse in the next construction section.

[0040] Example 2 This embodiment is a technical extension of Embodiment 1. The main difference is that the power source of the lifting mechanism is upgraded to further improve construction efficiency and control synchronization accuracy.

[0041] In this embodiment, the manual lifting mechanism 200 is replaced by an electric hoist (such as a chain electric hoist or a wire rope electric hoist). One electric hoist of the same model and specifications is installed on the top crossbeam 101 of each gantry 100. The control systems (such as remote control receivers) of all electric hoists are connected to a central synchronous control box. This control box can receive unified commands from handheld remote controls and synchronously send "up," "down," or "stop" signals to the motors of all electric hoists.

[0042] Its construction process is similar to that of Example 1, but the following optimizations are made to key steps: Step 2 (Lifting Mechanism Installation): Install the electric hoist and connect the power supply and synchronous control signal line.

[0043] Step 5 (Synchronized Lowering and Precise Positioning): The operator only needs to issue a "lower" command via a handheld remote control. All electric hoists, under the control of the synchronization box, will automatically operate at the same speed, achieving absolute synchronization, uniform speed, and smooth lowering of the steel frame. This completely eliminates the risk of swaying caused by asynchronous manual operation, making the lowering process smoother. A slow speed setting can also be set to achieve millimeter-level precise control. Furthermore, electric hoists typically have a self-locking function, further enhancing safety.

[0044] Example 3 This embodiment provides a preferred implementation scheme with specific parameterization, applicable to the construction of frame beams of common sizes.

[0045] In this embodiment, the specific parameters of the device are set as follows: Frame 100: The top crossbeam 101 is made of [10 channel steel, with a length of 1.2 meters (spanning both sides of the beam); the column 102 is made of L63×6 angle steel, with a height of 1.8 meters (adjustable according to the floor height).

[0046] Support system: On the inner side of each angle steel column 102, ten short sleeves 300 of Φ32×60mm are evenly welded along its entire length (i.e., one is installed every 160mm, starting 200mm from the top of the base 600). The horizontal crossbar 301 is made of Φ28 threaded steel bar, which has high strength and a surface texture that increases friction with the sleeves.

[0047] Spacing: The center-to-center spacing of the gantry 100 along the beam length is set to 1.5 meters (this is the median value in the range of 1.2m-1.5m). For a frame beam with a total length of 12 meters, 9 gantry frames are required (one at each end, and evenly distributed in the middle at 1.5-meter intervals).

[0048] Other components: The manual lifting mechanism 200 uses a 2-ton manual chain hoist; the base 500 is a 300mm×300mm×10mm steel plate.

[0049] The advantage of this parameter configuration is that: 10 sleeves: Provides ample support height adjustment positions, suitable for a wide range of beam heights from 400mm to 1600mm, offering strong versatility.

[0050] 1.5-meter gantry spacing: After mechanical calculation, this spacing can ensure that the deflection of the frame is controllable under suspension and support conditions for the weight of the steel skeleton of most civil building frame beams, and the overall stability of the device is good and the economy is excellent.

[0051] Threaded steel bars as crossbars are inexpensive, readily available on-site, and their threads prevent them from slipping easily in the sleeve, thus enhancing the stability of the support.

[0052] Although the technical solutions of this utility model have been described and enumerated in detail, it should be understood that modifications to the above embodiments or the adoption of equivalent alternatives are obvious to those skilled in the art. Such modifications or improvements made without departing from the spirit of this utility model are all within the scope of protection claimed by this utility model.

Claims

1. An auxiliary device for installing the steel reinforcement cage of a frame beam, characterized in that, The system includes multiple portal frames (100) spaced apart along the beam position. Each portal frame (100) includes a top crossbeam (101) and two columns (102). The top crossbeam (101) is mounted on the top of the two columns (102). At least one manual lifting mechanism (200) is connected to the bottom of the top crossbeam (101). Multiple supporting connectors (300) are provided on the side of each column (102) along its height direction. A horizontal crossbar (301) is detachably passed through the supporting connector (300). The horizontal crossbar (301) supports the steel reinforcement skeleton (400). A bottom support block (500) is located below the steel reinforcement skeleton (400) and is mounted on the beam position.

2. The auxiliary device for installing the steel reinforcement cage of a frame beam according to claim 1, characterized in that, The top beam (101) is a channel steel, the column (102) is an angle steel, and the manual lifting mechanism (200) is a hand chain hoist.

3. The auxiliary device for installing the steel reinforcement cage of a frame beam according to claim 1, characterized in that, The supporting connector (300) is a horizontally arranged sleeve, which is welded or fixed to the side of the column (102) by bolts; the horizontal crossbar (301) is a steel bar or round steel.

4. The auxiliary device for installing the steel reinforcement cage of a frame beam according to claim 1, characterized in that, The number of supporting connectors (300) provided on the side of each column (102) is 8-12, and they are evenly distributed along the height direction.

5. The auxiliary device for installing the steel reinforcement cage of a frame beam according to any one of claims 1-4, characterized in that, Multiple gantry frames (100) are arranged at intervals of 1.2m-1.8m along the beam length direction.

6. The auxiliary device for installing the steel reinforcement cage of a frame beam according to claim 1, characterized in that, The bottom of the column (102) is connected to the base (600), which is a rectangular steel plate.

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