A foundation pit ladder

Abstract

A pit climbing ladder, relating to the technical field of pit climbing ladders, includes a climbing ladder body with guardrails on both sides and steps in the middle. Several vertical bars are provided on both sides of the climbing ladder body, with I-beams at the top of each bar. Adjacent I-beams are welded together with connecting plates to form a stable top support. At least three I-beams are provided, and a sliding trolley is slidably fitted onto the I-beam directly above the middle of the climbing ladder body. An electric hoist is mounted on the sliding trolley. This invention achieves convenient lifting of items by setting a stable support structure composed of I-beams at the top of the climbing ladder body and integrating a sliding trolley and an electric hoist, eliminating the need for excavating an independent lifting channel and effectively solving the problems of limited hand operation and risks associated with carrying items during climbing.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit climbing ladder technology, specifically a foundation pit climbing ladder. Background Technology

[0002] During foundation pit construction, due to the considerable depth of the pit, workers frequently need to carry various tools and small materials, such as measuring instruments, handheld devices, or spare parts, when climbing up and down. Currently, the common practice is to strap these items to the body or hold them directly in the hand. This not only restricts hand operation during climbing, significantly increasing physical exertion and difficulty in coordinating movements, but also makes it highly susceptible to falls due to swaying items or insufficient support from one hand, leading to a loss of balance and potentially causing personnel to fall or items to drop accidentally, seriously threatening construction safety.

[0003] To address this challenge, existing technologies attempt to introduce integrated lifting solutions, such as the pit climbing ladder structure described in Chinese patent CN222391090U, which achieves goods transportation by adding an embedded cargo lifting channel next to the vertical ladder. However, this design requires the excavation of an independent lifting channel, significantly increasing the amount of earthwork and construction costs, and extending the overall construction period; in addition, the vertical channel itself poses a risk of slipping, and once a fall occurs, it will directly lead to a fall from height accident, posing a significant safety hazard. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art above, and then to propose a foundation pit climbing ladder.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A foundation pit climbing ladder includes a climbing ladder body, guardrails on both sides of the climbing ladder body, steps in the middle of the climbing ladder body, several vertical bars on both sides of the climbing ladder body, I-beams at the top of the vertical bars, and a stable top support formed by welding connecting plates between adjacent I-beams. At least three I-beams are provided, and a sliding trolley is slidably fitted on the I-beam directly above the middle of the climbing ladder body. An electric hoist is hoisted on the sliding trolley.

[0006] Furthermore, the top of the I-beam is covered with a top plate.

[0007] Furthermore, the sliding trolley includes two fixed plates, which are fixedly connected by bolts and nuts. Several traveling wheels are installed on the two fixed plates, and a drive motor is provided on the fixed plates. The drive motor can drive the traveling wheels to rotate, and an I-beam is clamped between the two fixed plates.

[0008] Furthermore, the mating surface between the I-beam and the traveling wheel is provided with anti-slip teeth, and the surface of the traveling wheel is provided with meshing teeth that cooperate with the anti-slip teeth.

[0009] Furthermore, a hoisting rod is provided between the two fixed plates, and an electric hoist is installed on the hoisting rod.

[0010] Furthermore, the bottom of the I-beam is provided with a redundant anti-slip mechanism.

[0011] Furthermore, the redundant anti-slip mechanism includes a first winding wheel, a slider, a second winding wheel, a connecting plate, an end plate, a tensioning screw, a left nut, and a right nut. The bottom of the I-beam is slidably fitted with a slider, and a connecting plate is formed at the end of the slider. A tensioning screw is provided on the connecting plate. The I-beam is welded with an end plate. The tensioning screw passes through a through hole in the end plate and is locked and fixed by the left nut and the right nut. The first winding wheel and the second winding wheel are connected by a steel wire rope. A rotary motor is installed on the I-beam, and the rotary electrode can drive the first winding wheel to rotate. The steel wire rope is connected to the sliding trolley through a buckle.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model achieves convenient lifting of items by setting a stable support structure made of I-beams at the top of the ladder body and integrating a sliding trolley and an electric hoist. It eliminates the need for additional excavation of an independent lifting channel, effectively solving the problems of limited hand operation and risks of carrying items during climbing. It also solves the problem of inconvenience for construction workers to carry tools and small materials when going up and down the foundation pit, avoids the increased costs and safety hazards caused by additional excavation of lifting channels, and improves construction safety and work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a schematic diagram of the sliding trolley. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] A pit climbing ladder includes a ladder body 100, with guardrails 101 on both sides and a step 102 formed in the middle of the ladder body. The guardrails can be understood as protective structures arranged along both sides of the ladder body, their main function being to prevent lateral falls during climbing. Specifically, the guardrails can be integrated with the ladder body through welding, bolting, or snap-fit ​​fixing, for example, by using steel pipes, angle steel, or other profiles to meet strength and stability requirements. The above are all prior art and will not be explained further.

[0016] In at least one embodiment, a plurality of vertical rods 201 are provided on both sides of the ladder body. These vertical rods, as part of the support structure, primarily function to support the weight of the top I-beam and its related components. In practical applications, the vertical rods can be fixed to both sides of the ladder body by welding or bolting. Their material can be metal tubing, structural steel, or other materials with sufficient strength. For example, the vertical rods can be reinforced with transverse tie rods to improve the overall structural stability.

[0017] Multiple vertical bars are topped with I-beams 202. These I-beams, as the core component of the top support, primarily provide the track foundation for the sliding trolley. In practical applications, the I-beams can be fixed to the top of the vertical bars by welding, bolting, or other methods, and their number can be adjusted according to load requirements. Adjacent I-beams are welded together with connecting plates to form a stable top support. The top of the I-beams is covered with a top plate 5, which is a protective structure covering the I-beams and can be made of metal sheet, composite material, or high-strength plastic sheet.

[0018] This solution creates a complete protective system by installing a top plate on top of the I-beam. The top plate is tightly connected to the I-beam using fasteners, ensuring its stability under various environmental conditions. The top plate effectively blocks the contact path between moisture and the I-beam surface, preventing slippage of the sliding trolley wheels due to wetness, thus ensuring the reliability of equipment operation. Furthermore, the full coverage of the top plate prevents dust and debris from falling into the I-beam track, preventing track blockage or wear, thereby extending the equipment's service life.

[0019] Furthermore, at least three I-beams are provided, with a sliding trolley slidably fitted on the I-beam directly above the center of the ladder body. An electric hoist 304 is mounted on the sliding trolley. The hook of the electric hoist can be used to suspend heavy objects and tools, enabling the hoisting and lowering of items with the help of automated equipment.

[0020] Furthermore, the sliding trolley is designed to allow for flexible movement along the I-beam track. In practical applications, the sliding trolley can engage with the I-beam via rollers, sliders, or other sliding mechanisms. For example, the sliding components can be made of materials with a low coefficient of friction to reduce running resistance. Additionally, the sliding trolley can be powered by manual pushing and pulling, rope traction, or other drive methods to adapt to different usage requirements.

[0021] The innovation of this application lies in integrating a top track with a mobile lifting device, eliminating the need for construction workers to carry items during the climb, thereby reducing safety risks and physical exertion, while also avoiding the need for additional excavation of embedded passages. Specifically, the I-beam is placed directly above the ladder based on the height of the vertical pole, forming an elevated track without interfering with the climbing path below. This design effectively solves the problems of instability and fall risk caused by holding or binding items in the prior art.

[0022] Furthermore, the sliding trolley includes two fixed plates 301, which are fixedly connected by bolts 305 and nuts. Several traveling wheels 306 are installed on the two fixed plates. A drive motor 302 is provided on the fixed plate, which can drive the traveling wheels to rotate. An I-beam is held between the two fixed plates, and the traveling wheels can move along the I-beam.

[0023] Specifically, the fixed plate refers to the supporting component used to construct the main frame of the sliding trolley. It can be made of sheet metal or high-strength composite materials, and its purpose is to provide a stable mounting base. The combination of bolts and nuts can be understood as an adjustable fastener. In practical applications, different specifications of bolts and nuts can be selected to adapt to changes in the size of the I-beams, thereby ensuring the reliability of the connection. The traveling wheels can be roller structures with bearings, and their surfaces can be decorated with different textures or materials to enhance friction. The drive motor specifically refers to an electric motor capable of outputting stable power, which can transmit rotational motion to the traveling wheels through gear transmission or belt transmission.

[0024] Furthermore, the mating surface between the I-beam and the traveling wheel is provided with anti-slip teeth, and the surface of the traveling wheel is provided with meshing teeth that cooperate with the anti-slip teeth.

[0025] Anti-slip teeth refer to the regularly raised structures built on the surface of I-beams, which can be implemented in different forms such as straight teeth, helical teeth, or curved teeth. These tooth shapes provide a clear meshing path for the wheels, preventing random slippage caused by smooth surfaces. The meshing teeth are the concave-convex structures on the wheel surface that match the anti-slip teeth, and they can be formed through machining, casting, or injection molding. The purpose of this design is to transmit driving force through the mechanical interlocking of the teeth, ensuring improved operational stability and safety.

[0026] Furthermore, a lifting rod 303 is provided between the two fixed plates, and an electric hoist is installed on the lifting rod. The lifting rod is a rigid support component used to support and install the electric hoist, and it can be made of high-strength steel in the form of a cylindrical or rectangular cross-section rod.

[0027] To prevent rapid slippage during lifting by the electric hoist, the bottom of the I-beam is equipped with a redundant anti-slip mechanism. This redundant anti-slip mechanism is a mechanical structure that provides additional safety when the main anti-slip system fails. It can be implemented using various independently operating friction locking or physical blocking methods. Its purpose is to immediately intervene and suppress unintended movement of the sliding trolley when the main anti-slip mechanism malfunctions.

[0028] The redundant anti-slip mechanism includes a first winding wheel 401, a slider 402, a second winding wheel 403, a connecting plate 404, an end plate 405, a tensioning screw 406, a left nut 407, and a right nut 408. The bottom of the I-beam is slidably fitted with a slider, and the end of the slider is formed with a connecting plate 404. A tensioning screw 406 is provided on the connecting plate. The end plate 405 is welded to the I-beam in cooperation with the tensioning screw. The tensioning screw passes through a through hole in the end plate and is locked and fixed by the left nut 407 and the right nut 408. The first winding wheel and the second winding wheel are connected by a steel wire rope. A rotary motor is installed on the I-beam, and the rotary electrode can drive the first winding wheel to rotate. The steel wire rope is connected to the sliding trolley through a locking buckle.

Claims

1. A pit climbing ladder, comprising a ladder body, wherein guardrails are provided on both sides of the ladder body, and steps are formed in the middle of the ladder body, characterized in that, The ladder body has several vertical bars on both sides, and each vertical bar has an I-beam at the top. Adjacent I-beams are welded together by connecting plates to form a stable top support. There are at least three I-beams. A sliding trolley is slidably fitted on the I-beam directly above the middle of the ladder body. An electric hoist is hoisted on the sliding trolley.

2. The pit ladder according to claim 1, characterized in that, The top of the I-beam is covered with a top plate.

3. The pit ladder according to claim 1, characterized in that, The sliding trolley includes two fixed plates, which are fixedly connected by bolts and nuts. Several traveling wheels are installed on the two fixed plates. A drive motor is provided on the fixed plates, which can drive the traveling wheels to rotate. An I-beam is clamped between the two fixed plates.

4. The pit ladder according to claim 3, characterized in that, The mating surface between the I-beam and the traveling wheel is provided with anti-slip teeth, and the surface of the traveling wheel is provided with meshing teeth that cooperate with the anti-slip teeth.

5. The pit ladder according to claim 3 or 4, characterized in that, A hoisting rod is provided between the two fixed plates, and an electric hoist is installed on the hoisting rod.

6. The pit ladder according to claim 5, characterized in that, The bottom of the I-beam is equipped with a redundant anti-slip mechanism.

7. The pit ladder according to claim 6, characterized in that, The redundant anti-slip mechanism includes a first winding wheel, a slider, a second winding wheel, a connecting plate, an end plate, a tensioning screw, a left nut, and a right nut. The bottom of the I-beam is slidably fitted with a slider, and the end of the slider forms a connecting plate. A tensioning screw is provided on the connecting plate. The I-beam is welded with an end plate. The tensioning screw passes through a through hole in the end plate and is locked and fixed by the left nut and the right nut. The first winding wheel and the second winding wheel are connected by a wire rope. A rotary motor is installed on the I-beam, which can drive the first winding wheel to rotate. The wire rope is connected to the sliding trolley through a buckle.

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