Multifunctional step ladder for circuit breaker maintenance and use method

Abstract

The invention discloses a multifunctional step ladder for circuit breaker maintenance and a use method. The step ladder comprises a box ladder main body, a foldable foot stool is hinged to one side of the step ladder main body, a foldable guardrail is hinged to the upper end of the step ladder main body, and a horizontal tool table is hinged to the top of the guardrail. The step ladder has a folded state and an unfolded state. When the step ladder is folded, all the components enclose a regular box body, so that the step ladder is convenient to carry and store; when the box ladder is unfolded, the foot stools and the top of the box ladder body form a two-stage climbing ladder, the guardrails form a safety fence, and the tool table provides an operation plane. The universal wheels and the adjustable foot cups are arranged at the bottom of the box body so that moving and leveling can be facilitated, the storage bin is integrated in the box body so that tools can be stored conveniently, and self-locking after folding is achieved through mutual limiting of the transverse supports, the clamping lock structures and components. The device integrates the functions of climbing, protection, tool storage and an operation platform, and the efficiency, safety and convenience of maintenance work are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of power maintenance equipment technology, specifically to a multi-functional staircase for circuit breaker maintenance and its usage method. Background Technology

[0002] A staircase, also known as a ladder or climbing ladder, is a specialized piece of equipment that provides a platform for workers to perform tasks at heights. It is widely used in various fields such as power maintenance, equipment upkeep, warehousing and logistics, and daily life. In the power industry, circuit breakers, as important electrical equipment, require regular inspection and maintenance, and staircases are an indispensable auxiliary tool for maintenance personnel when performing tasks at heights.

[0003] However, traditional staircases are functionally limited and inconvenient in several ways: First, their fixed structure and bulky size require significant space for movement and storage, especially in confined spaces like substations or distribution rooms. Second, traditional staircases typically lack storage, requiring maintenance personnel to carry additional tool bags or boxes, making tool retrieval and storage difficult during work at heights, impacting efficiency and posing a risk of tools falling. Third, most simple staircases lack effective safety railings, creating safety hazards for workers operating at heights. Finally, traditional staircases lack integrated work surfaces, forcing maintenance personnel to handle tools or parts by hand for delicate operations, which is extremely inconvenient. Therefore, there is an urgent need for a multifunctional staircase that integrates access, protection, tool storage, and an operating platform, while also being easy to move and store, to solve these problems. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-functional staircase for circuit breaker maintenance and its usage method. It integrates climbing, protection, tool storage, and operation platform, and is easy to move and store. It solves the problems of traditional staircases, such as single function, fixed structure, inconvenience in moving and storing, lack of storage function leading to difficulty in retrieving and storing tools and the risk of falling, lack of safety railings posing safety hazards, and lack of integrated work surface leading to inconvenience in fine operation.

[0005] (II) Technical Solution To achieve the aforementioned goal of integrating a platform for climbing, protection, tool storage, and operation into one unit, facilitating movement and storage, the technical solution adopted in this application includes: This application provides a multi-functional staircase for circuit breaker maintenance, including a box-type ladder body. One side of the box-type ladder body is hinged with a footstool that can be flipped outward to an upright state or folded inward to fit against the side of the box-type ladder body. The upper end of the box-type ladder body is hinged with a guardrail that can be flipped upward to an upright state or folded downward to the outer contour of the box-type ladder body. The top of the guardrail is hinged to a horizontal tool table that can be flipped and unfolded. The staircase has a first state and a second state: In the first state, the footstool is folded up, the guardrail is folded up, and the tool table is folded up, with all the components together forming a neat box that is easy to transport. In the second state, the top of the footstool serves as the first step, and the top of the main body of the box ladder serves as the second step, together forming a stepped climbing structure; the guardrail unfolds to form a work protection fence; and the tool table unfolds to form an operating platform.

[0006] The guardrail includes an L-shaped frame and handrails installed on both sides of the L-shaped frame. A cross brace is connected to the two handrails, and a locking block is provided on one of the handrails and a fixing bolt is used. One end of the cross brace is rotatably connected to a handrail, and the other end can be mounted on a locking block of another handrail and locked by fixing bolts.

[0007] The upper part of the side of the elevator body has a pivot shaft, and the guardrail is hinged to the elevator body through the pivot shaft. The guardrail is equipped with a locking structure for locking with the elevator body in the second state. In the first state, the cross brace and the tool table are located on both sides of the elevator body and work together to lock the folded guardrail on the outer contour of the elevator body.

[0008] The ladder body has a pivot shaft on one side, and the foot stool is hinged to the ladder body via the pivot shaft. In the first state, the tool table is folded up and abuts against the foot stool in the folded state, thus achieving auxiliary locking of the foot stool.

[0009] The main body of the elevator box has two universal wheels with brakes on one side and two height-adjustable footrests on the other side; the foot stool has four height-adjustable footrests on the bottom, and the footrests on the bottom of the main body of the elevator box are located on the side near the foot stool.

[0010] The outer surface of the main body of the ladder away from the footstool is rotatably connected to a telescopic support column and a fixed elastic retaining ring. The end of the telescopic support column that supports the ground is provided with an anti-slip pad. The telescopic support column can be fixed by rotating and engaging with the elastic retaining ring.

[0011] The tool table and the guardrail are connected by a folding hinge.

[0012] The main body of the elevator box has a storage compartment inside, which is equipped with a cabinet door.

[0013] The main body of the box ladder has a retractable handle on the top of the side away from the footstool, and a disassembly handle on the side.

[0014] This application embodiment also provides a method for using the aforementioned multi-functional staircase for circuit breaker maintenance, including the following steps: Move the ladder in its first state to the work point; sequentially flip and unfold the guardrail, the footstool, and the tool table; perform the inspection and maintenance work by climbing the first and second steps; after the work is completed, operate in the reverse order to restore the ladder to its first state.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a multi-functional staircase for circuit breaker maintenance and a method of use, which has the following advantages: This multi-functional step ladder for circuit breaker maintenance integrates climbing, safety, tool storage, and an operating platform. The footstool and the main ladder form a stepped climbing structure, while guardrails provide safety protection. A tool table facilitates precise operation, and internal storage compartments solve the problem of tool access and storage. In terms of usage, the ladder can be folded into a neat box shape for easy movement and storage, saving space and greatly improving the efficiency and safety of circuit breaker maintenance work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first orientation structure of the present invention in its unfolded state; Figure 2 This is a schematic diagram of the second-direction structure of the present invention in its unfolded state; Figure 3 This is a schematic diagram of the overall structure of the present invention in its folded state.

[0017] In the diagram: 1. Main body of the ladder; 2. Foot stool; 3. Guardrail; 4. Tool table; 5. Cross brace; 6. Locking block; 7. Fixing bolt; 8. Locking structure; 9. Casters; 10. Foot cup; 11. Telescopic support column; 12. Elastic retaining ring; 13. Anti-slip foot pad; 14. Folding hinge; 15. Storage compartment; 16. Cabinet door; 17. Pull rod handle; 18. Removal handle; 101. Rotating shaft one; 102. Rotating shaft two; 301. L-shaped frame; 302. Handrail. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] In the SF6 gas detection phase of circuit breaker (combined electrical appliance) maintenance, some SF6 density relays are installed at high positions, requiring maintenance personnel to work at heights. However, current on-site solutions have significant shortcomings: firstly, there are no readily available insulated ladders on-site; they are stored in safety tool rooms or high-voltage rooms, and borrowing them is cumbersome and time-consuming, affecting the work progress; secondly, using toolboxes (instrument cases) as temporary ladders is non-standard, unstable, and lacks insulation protection, posing risks of falls and electric shock. Existing climbing tools are limited in function, and their portability, safety, and functionality fail to meet the requirements, necessitating the urgent need for specialized integrated equipment.

[0020] Therefore, the multifunctional step ladder designed in this invention integrates climbing, protection, tool storage, and an operating platform. The footstool and the main body of the ladder form a stepped climbing structure, the guardrail provides safety protection, the tool table facilitates precise operation, and the internal storage compartment solves the problem of tool retrieval and storage. In terms of usage, the step ladder can be folded into a neat box shape, facilitating movement and storage, saving space, and greatly improving the efficiency and safety of circuit breaker maintenance work.

[0021] Example 1 Please see Figure 1-3 A multi-functional ladder for circuit breaker maintenance includes a box ladder body 1, a footstool 2 hinged to one side of the box ladder body 1 that can be flipped outward to an upright state or folded inward to fit against the side of the box ladder body 1; a guardrail 3 hinged to the upper end of the box ladder body 1 that can be flipped upward to an upright state or folded downward to the outer contour of the box ladder body 1; and a horizontal tool table 4 hinged to the top of the guardrail 3 that can be flipped and unfolded. It should be noted that the main body 1 of the box ladder consists of a box frame and a sealing plate. The sealing plate is made of fiberglass and riveted to the box frame to ensure firmness, reliability and insulation. The guardrail 3 is made of rigid nylon, while the tool table 4 is made of plastic to further improve insulation. The footstool 2 is also made of fiberglass on the step surface.

[0022] The ladder has a first state and a second state: In the first state, the foot stool 2 is folded up, the guardrail 3 is folded up, and the tool table 4 is folded up, and the components together form a regular box that is easy to move; In the second state, the top of the foot stool 2 serves as the first step, and the top of the main body of the ladder 1 serves as the second step, and the two together form a step climbing structure; the guardrail 3 is unfolded to form a work protection fence; and the tool table 4 is unfolded to form an operating platform.

[0023] It should be noted that, furthermore, the outer contours of the main body 1, footstool 2, guardrail 3, and tool table 4 are flush when folded, forming an integral box structure, which facilitates transportation using pull rods and casters 9, and also makes it easy to store in vehicles or tool rooms, greatly improving the portability and storage efficiency of the equipment.

[0024] In this embodiment, the guardrail 3 includes an L-shaped frame 301 and handrails 302 installed on both sides of the L-shaped frame 301. The handrails 302 facilitate climbing for workers. A cross brace 5 is connected to the two handrails 302. One handrail 302 is provided with a locking block 6 and a fixing bolt 7. One end of the cross brace 5 is rotatably connected to one handrail 302, and the other end can be placed on the locking block 6 of the other handrail 302 and locked by the fixing bolt 7.

[0025] It should be noted that the horizontal brace 5 provides additional lateral support when deployed, enhancing the overall rigidity and stability of the guardrail 3, preventing swaying when workers lean against it, and improving the level of safety protection.

[0026] When the device switches between the first and second states, the cross brace 5 needs to be rotated. In the second state, when the cross brace 5 cooperates with the locking block 6, it can further protect the workers and make the device safer to use. In addition, when the device is in the first state, the cross brace 5 can be used to fix the device in the first state, so that no additional fixing device is needed, which saves materials and improves the performance of the components.

[0027] In this embodiment, a pivot 101 is provided in the middle of the upper side of the main body 1 of the elevator box. The guardrail 3 is hinged to the main body 1 of the elevator box through the pivot 101. The guardrail 3 is provided with a locking structure 8 for locking with the main body 1 of the elevator box in the second state. In the first state, the cross brace 5 and the tool table 4 are located on both sides of the main body 1 of the elevator box and work together to lock the guardrail 3 in the folded state on the outer contour of the main body 1 of the elevator box.

[0028] It should be noted that the locking structure 8 is preferably a spring pin type, which is easy to operate and reliable in locking, preventing the guardrail 3 from being accidentally deployed during handling or vibration, and ensuring transportation safety.

[0029] It should be further explained that the pivot 101 is designed in the middle of the upper side of the main body 1 of the elevator box, so that the guardrail 3 can perfectly fit the outer contour of the main body 1 of the elevator box after rotation, thereby improving the fit between the guardrail 3 and the main body 1 of the elevator box.

[0030] In this embodiment, a pivot 102 is provided on one side of the main body 1 of the elevator box. The foot stool 2 is hinged to the main body 1 of the elevator box through the pivot 102. In the first state, the tool table 4 is folded and then abutted against one side of the foot stool 2 in the folded state, thereby achieving auxiliary locking of the foot stool 2.

[0031] It should be noted that this design achieves its self-locking function through the mutual constraints between components, eliminating the need for additional locks. The structure is simple and highly reliable, meeting the needs of rapid deployment and storage on site.

[0032] In this embodiment, the bottom of the main body 1 of the elevator box is provided with two universal wheels 9 with braking function on one side and two height-adjustable foot cups 10 on the other side; the bottom of the foot stool 2 is provided with four height-adjustable foot cups 10, and the foot cups 10 at the bottom of the main body 1 of the elevator box are located on the side close to the foot stool 2.

[0033] It should be noted that the foot cup 10 adopts a threaded adjustment structure, which can be finely adjusted according to the flatness of the ground to ensure that the ladder remains level and stable during use, avoiding shaking or tilting due to uneven ground, and further improving the safety of operation.

[0034] It should be further explained that after the footstool 2 is flipped and unfolded, the foot cup 10 should be rotated first to level the footstool 2. The two casters 9 with brakes and the two foot cups 10 are installed at the bottom of the elevator body 1. This is specifically designed for working environments with a certain slope, so that the device can work under certain slope conditions without affecting transportation. Specifically, in a high slope working environment, the elevator body 1 is first supported by the two casters 9 and transported to the designated location. Then, the brakes are stepped on to lock the casters 9, and the height of the foot cups 10 is rotated to support and fix the foot cups 10 on the ground, so that it can work under slope conditions.

[0035] In this embodiment, a telescopic support column 11 and an elastic retaining ring 12 are rotatably connected to the outer surface of the side of the main body 1 away from the foot stool 2. An anti-slip pad 13 is provided at the end of the telescopic support column 11 that supports the ground to increase the friction between the telescopic support column 11 and the ground, making the support more stable and safe. The telescopic support column 11 can be fixed by rotating and engaging with the elastic retaining ring 12, thereby improving the flexibility and retractability of the telescopic support column 11.

[0036] It should be noted that the telescopic support column 11 provides additional support when deployed, enhancing the overall structure's resistance to overturning, and is particularly suitable for soft ground or working environments requiring additional stability; when stored, it is secured by the elastic retaining ring 12 to prevent shaking.

[0037] In addition, the telescopic support column 11 can be fixed by threaded telescopic, elastic buckle telescopic, or bolt locking telescopic.

[0038] In some embodiments, the tool table 4 and the guardrail 3 are connected by a folding hinge 14. The folding hinge 14 is a commonly available 90-degree folding hinge, which allows the tool table 4 to be fixed at both 0-degree and 90-degree angles with the guardrail 3, improving the practicality of the device and making it more convenient to use. The main body 1 of the box ladder has a storage compartment 15 inside, equipped with a cabinet door 16. A retractable pull handle 17 is provided on the top of the side of the main body 1 away from the footstool 2. The pull handle 17 is similar to the design of a suitcase handle, making it easy for workers to transport the device using the universal wheels 9 designed at the bottom. A disassembly handle 18 is also provided on the side for use when transporting and unloading the device.

[0039] It should be noted that the storage compartment 15 can be divided into multiple functional areas for easy classification and storage of tools and instruments; the cabinet door 16 is equipped with a combination lock or mechanical lock to prevent tools from being lost or unauthorized access, thereby improving on-site management efficiency.

[0040] It should be further explained that the storage compartment 15 is enclosed by a fiberglass panel and the box frame. The panel material is the same as that of the main body of the elevator 1, which is convenient for design and manufacturing.

[0041] Example 2 Please see Figure 2 and 3 The diagrams show the device in its second and first states, respectively. A method for using a multi-functional staircase for circuit breaker maintenance includes the following steps: Move the ladder in its first state to the work point; sequentially flip and unfold the guardrail 3, footstool 2, and tool table 4; perform the inspection work by climbing the first and second steps; after the work is completed, operate in the reverse order to restore the ladder to its first state.

[0042] Furthermore, during the deployment process, the guardrail 3 should be deployed and locked first, then the footstool 2 should be deployed and the telescopic support column 11 should be adjusted, and finally the tool table 4 should be deployed. Ensure that each step is in a stable state before proceeding to the next step to ensure work safety.

[0043] The above are merely embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A multi-functional staircase for circuit breaker maintenance, comprising a box-type ladder body (1), characterized in that: The main body (1) of the box ladder is hinged to one side with a foot stool (2) that can be flipped outward to stand upright or folded inward to fit against the side of the main body (1); the upper end of the main body (1) of the box ladder is hinged to a guardrail (3) that can be flipped upward to stand upright or folded downward to the outer contour of the main body (1). The top of the guardrail (3) is hinged to a horizontal tool table (4) that can be flipped and unfolded. The staircase has a first state and a second state: In the first state, the footstool (2) is folded up, the guardrail (3) is folded up, and the tool table (4) is folded up, and the components together form a regular box that is easy to transport; In the second state, the top of the foot stool (2) serves as the first step, and the top of the main body of the box ladder (1) serves as the second step, together forming a stair climbing structure; the guardrail (3) unfolds to form a work protection fence; the tool table (4) unfolds to form an operating platform.

2. The multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: The guardrail (3) includes an L-shaped frame (301) and handrails (302) installed on both sides of the L-shaped frame (301). A cross brace (5) is connected to the two handrails (302). A locking block (6) is provided on one of the handrails (302) and a fixing bolt (7) is used. One end of the cross brace (5) is rotatably connected to a handrail (302), and the other end can be placed on a locking block (6) of another handrail (302) and locked by fixing bolts (7).

3. A multi-functional staircase for circuit breaker maintenance according to claim 2, characterized in that: A pivot (101) is provided at the middle of the upper side of the main body of the elevator box (1). The guardrail (3) is hinged to the main body of the elevator box (1) through the pivot (101). The guardrail (3) is provided with a locking structure (8) for locking with the main body of the elevator box (1) in the second state. In the first state, the cross brace (5) and the tool table (4) are located on both sides of the main body of the elevator box (1) and work together to lock the guardrail (3) in the folded state on the outer contour of the main body of the elevator box (1).

4. A multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: A pivot 2 (102) is provided on one side of the main body (1) of the box ladder. The foot stool (2) is hinged to the main body (1) of the box ladder through the pivot 2 (102). In the first state, the tool table (4) is folded and then limited to abutting against one side of the foot stool (2) in the folded state, thereby achieving auxiliary locking of the foot stool (2).

5. A multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: The bottom of the main body of the elevator box (1) is provided with two universal wheels (9) with brake function on one side and two height-adjustable foot cups (10) on the other side; the bottom of the foot stool (2) is provided with four height-adjustable foot cups (10), and the foot cups (10) at the bottom of the main body of the elevator box are located on the side close to the foot stool (2).

6. A multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: The outer surface of the main body (1) of the box ladder away from the footstool (2) is rotatably connected to a telescopic support column (11) and a fixed elastic retaining ring (12). The telescopic support column (11) is provided with an anti-slip foot pad (13) at one end supporting the ground. The telescopic support column (11) can be fixed by rotating and engaging with the elastic retaining ring (12).

7. A multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: The tool table (4) and the guardrail (3) are connected by a folding hinge (14).

8. A multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: The main body (1) of the elevator box has a storage compartment (15) inside and is equipped with a cabinet door (16).

9. A multi-functional staircase for circuit breaker maintenance according to claim 1, characterized in that: The main body of the box ladder (1) is provided with a retractable handle (17) on the top of the side away from the footstool (2), and a disassembly handle (18) is also provided on the side.

10. A method for using a multifunctional staircase as described in any one of claims 1-9, characterized in that, Includes the following steps: Move the ladder in the first state to the work point; flip and unfold the guardrail (3), the footstool (2), and the tool table (4) in sequence; carry out the high-altitude maintenance work through the first and second steps; after the work is completed, operate in the reverse order to restore the ladder to the first state.

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