A ladder frame tool facilitating precast steel beam bolt installation and dismounting

Abstract

The utility model belongs to the technical field of building engineering, concretely relates to a ladder frame tool convenient for prefabricated steel beam bolt installation and dismounting, aims at solving the problem of limited high-altitude operation surface and difficult access to the lower part bolt of steel beam. The tool includes ladder frame main part and hook support: the ladder frame main part is composed of rectangular platform, straight ladder and guardrail, provides standing operation surface and protection; the hook support is connected on the flange of steel beam through the first hook of the rectangle, and the ladder frame main part is hung through the second hook with anti -drop structure. When installing, first fix the support, then install the ladder frame, the worker climbs to the rectangular platform through the straight ladder, and operates safely with the help of guardrail. The utility model provides stable operation surface for the worker, solves the problem of difficult access to the bolt, guarantees safety through the anti -skid and anti -drop structure, is simple in structure and easy to dismount, is suitable for various steel beam sizes, and improves construction quality and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, specifically relating to a ladder frame tooling that facilitates the installation and disassembly of prefabricated steel beam bolts. Background Technology

[0002] Steel structure buildings are widely used in modern construction due to their advantages such as light weight, high strength, short construction period, and reusability of steel. Among them, the connection between steel beams and steel columns is a key link in steel structure construction, and currently, the common method is to use end plates and flange bolts for fixing.

[0003] However, existing steel structure construction processes suffer from significant technical defects: in high-altitude operations, workers' working surfaces are limited, making it difficult to safely and conveniently reach the bolt positions at the bottom of the steel beams. This leads to difficulties in bolt installation and removal, affecting not only construction quality (such as insufficient bolt tightening torque) but also significantly reducing construction efficiency. Furthermore, in existing connection processes, welding connections are complex and of inconsistent quality on-site, while bolt connections require repeated manual correction of component positions, elevations, and verticality, demanding high precision and presenting significant technical challenges. In addition, if tightening is inadequate, large-span steel beams are prone to deflection deformation after long-term use, causing additional tension on the columns at the beam ends, creating gaps at the connections, and ultimately leading to bolt loosening, severely impacting structural stability.

[0004] Therefore, there is an urgent need to design an auxiliary device that facilitates high-altitude operations, provides workers with a sufficient working surface through a reliable fixing method, solves the problem of the difficulty in accessing the bolts at the bottom of the steel beam, and at the same time takes into account the ease of installation and structural safety of the device, so as to improve the quality and efficiency of steel structure construction. Utility Model Content

[0005] This utility model aims to overcome the shortcomings of existing technologies, such as limited high-altitude working surfaces and difficulty in accessing the bolts at the bottom of steel beams. It provides a ladder frame tooling that facilitates the installation and disassembly of prefabricated steel beam bolts, thereby achieving the goals of providing workers with a stable working surface, simplifying the installation process, ensuring construction safety, and ultimately improving the quality and efficiency of steel structure construction.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A ladder frame fixture that facilitates the bolt installation and disassembly of prefabricated steel beams is characterized by comprising a ladder frame body and a bracket with hooks;

[0008] The main body of the ladder frame includes a rectangular platform, a straight ladder is connected to the upper side of one side of the rectangular platform, guardrails are connected to both sides of the straight ladder, and the bottom of the guardrails is fixed to the rectangular platform. The straight ladder is provided with multiple horizontal bars at intervals along the height direction.

[0009] The hook-supported bracket includes a bracket body. One end of the bracket body is fixed with a first hook that is adapted to the upper flange of the precast steel beam, and the other end is fixed with a second hook that is adapted to the plurality of crossbars. The hook-supported bracket is hung on one side of the upper flange of the precast steel beam through the first hook, and the ladder frame body is hung on the second hook through the crossbars.

[0010] The first hook has a U-shaped structure, which is adapted to engage with the upper flange of the precast steel beam, and the opening of the U-shaped structure faces the web of the precast steel beam. The upper end of the U-shaped structure is fixedly connected to the support body. The second hook includes a horizontal plate, a C-shaped hook, a movable locking plate, and a spring. The horizontal plate is fixedly connected to the support body. The C-shaped hook is fixed above the end of the horizontal plate. One end of the movable locking plate is rotatably connected to the horizontal plate. A spring is connected between the lower surface of the movable locking plate and the middle of the horizontal plate, and the spring is in its natural state. The end of the movable locking plate is engaged inside the opening of the C-shaped hook.

[0011] In some embodiments, two first hooks are provided, and both first hooks and the bracket body are integrally formed.

[0012] In some embodiments, multiple second hooks are arranged side by side.

[0013] In some embodiments, the horizontal plate and the C-shaped hook of the second hook are integrally formed.

[0014] In some embodiments, the inner wall of the first hook that contacts the upper flange of the precast steel beam is provided with anti-slip serrations.

[0015] In some embodiments, the end of the guardrail away from the ladder is arc-shaped, and the arc curves upward toward the ladder.

[0016] Compared with the prior art, the present invention has at least one of the following advantages or beneficial effects:

[0017] I. Solving the problem of limited working space: The combination structure of hook bracket and ladder frame provides workers with a stable standing working surface, making the bolts under the steel beams easily accessible and avoiding bolt tightening quality problems caused by insufficient operating space. Moreover, by changing the position of the hook bracket, the bolts under the steel beams in different positions can be installed and removed, thereby improving construction efficiency.

[0018] II. Ensuring structural stability and safety: The anti-slip serrations of the first hook prevent the support from sliding, and the movable plate and spring of the second hook prevent the main body of the ladder from falling off. Multiple protections ensure safety for high-altitude operations.

[0019] 3. Easy installation and strong versatility: The overall structure of the tooling is simple and adopts a hook-type connection, which eliminates the need for on-site welding or complex assembly and can be quickly installed and disassembled; the first hook is compatible with the upper flange size of conventional precast steel beams and is suitable for various steel structure construction scenarios. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the ladder frame body in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the hook-supported bracket in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the second hook in the spring's natural state in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the second hook in the compressed state of the spring in this embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the assembly of the ladder frame fixture for facilitating the installation and disassembly of prefabricated steel beam bolts in an embodiment of this utility model.

[0025] Figure 6 This is a schematic diagram illustrating the application of the ladder frame tooling for facilitating the installation and disassembly of prefabricated steel beam bolts in this embodiment of the present invention.

[0026] Among them, 1. Ladder frame body; 11. Rectangular platform; 12. Straight ladder; 13. Guardrail; 2. Support with hooks; 21. Support body; 22. First hook; 23. Second hook; 231. Horizontal plate; 232. C-shaped hook; 233. Movable plate; 234. Spring; 3. Precast steel beam. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0028] At the construction site, it was found that when steel structure workers were installing and removing bolts from steel beams and columns, they encountered situations where the bolts at the bottom of the steel beams could not be reached or there was not enough operating space. Based on this on-site requirement, a ladder-like auxiliary tool was designed to facilitate the tightening of steel beam bolts, which can provide construction workers with sufficient working space and thus improve efficiency.

[0029] like Figures 1-6 As shown, this utility model discloses a ladder frame fixture that facilitates the installation and disassembly of bolts on precast steel beams. It mainly consists of a ladder frame body 1 and a bracket with hooks 2, and the specific structure is as follows:

[0030] The main body of the ladder frame 1 includes a rectangular platform 11, a straight ladder 12, and a guardrail 13. The rectangular platform 11 provides a standing working surface for workers, and a straight ladder 12 is vertically fixed above one side for workers to climb up and down. The straight ladder 12 is provided with multiple crossbars at intervals along the height direction to facilitate climbing, and some crossbars can be hung on the second hook 23 as needed. Guardrails 13 are welded to both sides of the straight ladder 12, and the bottom of the guardrails 13 is fixed to the two side edges of the rectangular platform 11. The end of the guardrail 13 away from the straight ladder 12 is arc-shaped and bends away from the straight ladder 12 to avoid workers bumping into it and to make it easy for workers to hold on.

[0031] Hook-mounted bracket 2: includes bracket body 21, first hook 22, and second hook 23; the bracket body 21 is a steel structure, one end of which is fixed with the first hook 22 adapted to the upper flange of the precast steel beam 3, and the other end is fixed with the second hook 23 adapted to the crossbar of the straight ladder 12; in use, the hook-mounted bracket 2 is hung on one side of the upper flange of the precast steel beam 3 via the first hook 22, and the ladder frame body 1 is hung on the second hook 23 via the crossbar; the first hook 22 has a U-shaped structure, and the U-shaped structure is engaged with the upper flange of the precast steel beam 3. The U-shaped structure has its opening facing the web of the precast steel beam 3. The upper end of the U-shaped structure is fixedly connected to the support body 21. The inner wall of the first hook 22 in contact with the precast steel beam 3 is provided with anti-slip serrations to increase friction and prevent the support from sliding along the precast steel beam 3. Two first hooks 22 are provided, and both are integrally formed with the support body 21 to improve structural strength. Multiple second hooks 23 are arranged side-by-side along the length of the support body 21. Each second hook 23 includes a horizontal plate 231 and a C-shaped plate. The system includes a C-shaped hook 232, a movable retaining plate 233, and a spring 234. One end of the horizontal plate 231 is fixedly connected to the support body 21, and the other end is welded with a C-shaped hook 232. The C-shaped hook 232 is fixed above the end of the horizontal plate 231. One end of the movable retaining plate 233 is rotatably connected to the horizontal plate 231. A spring 234 is connected between the lower surface of the movable retaining plate 233 and the middle part of the horizontal plate 231. The spring 234 is in its natural state. The end of the movable retaining plate 233 is engaged with the upper inner side of the opening of the C-shaped hook to form an anti-detachment structure, preventing the ladder frame body from falling off the second hook 23. The horizontal plate 231 and the C-shaped hook 232 are integrally formed to improve the load-bearing capacity of the hook.

[0032] When the second hook 23 is in use, the crossbar of the ladder frame body 1 is placed into the second hook 23. Under the downward pressure of the crossbar, the movable plate 233 moves downward and the spring 234 is in a compressed state. After the crossbar is hung in the hook, the spring 234 automatically resets, forming a closed limit, which effectively prevents the ladder frame from slipping due to shaking during operation, thereby improving the safety and reliability of the tooling.

[0033] Installation and usage process:

[0034] During construction, the hook bracket 2 is first secured to one side of the upper flange of the precast steel beam 3 via the first hook 22 (the anti-slip serrations are in close contact with the steel beam 3 to ensure reliable fixation); then the crossbar of the straight ladder 12 is placed into the second hook 23 to complete the connection between the ladder frame and the hook bracket 2; workers climb the straight ladder 12 to the rectangular platform 11, stand on the rectangular platform 11, and with the help of the guardrail 13, safely pass through the gap between the crossbars of the straight ladder 12 to install and disassemble the bolts at the bottom of the steel beam 3.

[0035] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A ladder frame fixture for facilitating the bolt installation and disassembly of precast steel beams, characterized in that, Includes the main body of the ladder frame and the bracket with hooks; The main body of the ladder frame includes a rectangular platform, a straight ladder is connected to the upper side of one side of the rectangular platform, guardrails are connected to both sides of the straight ladder, and the bottom of the guardrails is fixed to the rectangular platform. The straight ladder is provided with multiple horizontal bars at intervals along the height direction. The hook-supported bracket includes a bracket body. One end of the bracket body is fixed with a first hook that is adapted to the upper flange of the precast steel beam, and the other end is fixed with a second hook that is adapted to the plurality of crossbars. The hook-supported bracket is hung on one side of the upper flange of the precast steel beam through the first hook, and the ladder frame body is hung on the second hook through the crossbars. The first hook has a U-shaped structure, which is adapted to engage with the upper flange of the precast steel beam, and the opening of the U-shaped structure faces the web of the precast steel beam. The upper end of the U-shaped structure is fixedly connected to the support body. The second hook includes a horizontal plate, a C-shaped hook, a movable locking plate, and a spring. The horizontal plate is fixedly connected to the support body. The C-shaped hook is fixed above the end of the horizontal plate. One end of the movable locking plate is rotatably connected to the horizontal plate. A spring is connected between the lower surface of the movable locking plate and the middle of the horizontal plate, and the spring is in its natural state. The end of the movable locking plate is engaged inside the opening of the C-shaped hook.

2. The ladder frame fixture for facilitating the bolt installation and disassembly of precast steel beams as described in claim 1, characterized in that, There are two first hooks, and both first hooks and the bracket body are integrally formed.

3. The ladder frame fixture for facilitating the bolt installation and disassembly of precast steel beams as described in claim 1, characterized in that, The second hook has multiple hooks arranged side by side.

4. The ladder frame fixture for facilitating the bolt installation and disassembly of precast steel beams as described in claim 1, characterized in that, The horizontal plate and C-shaped hook of the second hook are integrally formed.

5. The ladder frame fixture for facilitating the bolt installation and disassembly of precast steel beams as described in claim 1, characterized in that, The inner wall of the first hook that contacts the upper flange of the precast steel beam is provided with anti-slip serrations.

6. The ladder frame fixture for facilitating the bolt installation and disassembly of precast steel beams as described in claim 1, characterized in that, The end of the guardrail away from the straight ladder is arc-shaped, and the arc curves from bottom to top toward the straight ladder.

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