Multifunctional ladder

Abstract

The utility model aims to develop a multifunctional ladder which can be widely applied to a plurality of fields, including building and electrical industries, rain gutter maintenance, lamp replacement, safe lifeline installation, panel installation, painting, gypsum board and ceiling installation, and cleaning of outer walls of buildings, driving cabins of trucks, passenger cars and trailers and top areas of the trucks, the passenger cars and the trailers. Besides, in the field of logistics, the ladder is designed to provide various configurations, can be used for improving ergonomic conditions and working efficiency, is particularly suitable for granary unloading operation and truck compartment covering and uncovering operation, and is fixed on a compartment structure through a chain or a binding belt with a ratchet wheel so as to conveniently enter a compartment. A multi-functional ladder includes a lower base with tires and raised steps, a fixed ladder, a locking system of an operating lever, a top platform with side panels and doors, and a parallel movable ladder driven by the operating lever and provided with a step locking system. The designed height range of the ladder is 2-10 meters, and the ladder has multiple remarkable advantages.

Description

[0001] This application claims priority to the patent application with application number 202024002547-0, entitled "Innovative Structural Design of a Multifunctional Ladder", filed on February 7, 2024, in Brazil. Technical Field

[0002] This specification relates to a utility model patent application for a multi-functional ladder, primarily used in the field of safe work equipment, particularly providing a safe and economical way to access the interior of truck beds. The product design is highly practical and efficient, and therefore meets all the requirements for patent protection.

[0003] Innovative Structural Design of a Multifunctional Ladder: This product aims to introduce an innovative solution through improved technology and innovative processes. Made of metal, it can be applied in various fields, such as the construction and electrical industries, including gutter maintenance, light fixture replacement, lifeline installation, panel installation, painting, drywall and ceiling installation, cleaning building exteriors, and cleaning the cabs and tops of trucks, buses, and trailers. Furthermore, in the logistics industry, the ladder is designed with various configurations to improve ergonomics and work efficiency, particularly in grain unloading operations, truck bed covering and uncovering operations, or by securing it to the truck bed structure with chains or ratchet straps for easy access. The multifunctional ladder (E) mainly comprises: wheels (2) at the bottom, a locking mechanism, and manually and / or automatically operated guide ropes to adjust to the desired height. Designed for heights ranging from 2 to 10 meters, it offers numerous significant advantages, including providing a safe and ergonomic solution for working at heights and facilitating transportation. This is an evolutionary solution, and its practical results have significantly improved ease of use and effectiveness. Background Technology

[0004] To ensure the authenticity of this preface, the applicant will briefly but thoroughly describe the problems and deficiencies of existing multi-functional ladder technologies in the following paragraphs. These descriptions will enable those skilled in the art to identify the shortcomings of the prior art and further clarify the novelty of this invention, which is one of the necessary conditions for a patent application under the Industrial Property Act.

[0005] Working at heights is a real need in many industries, making this activity a frequent occurrence in the workplace. However, working at heights is also a highly dangerous form of work, and frequent exposure to such environments often leads to workplace injuries.

[0006] Contrary to common perceptions of the risks of working at heights, such work is not limited to tasks involving extremely high altitudes, such as high-rise building construction or large-scale projects related to large events (such as stadium construction).

[0007] According to the NR 35 standard, any activity performed at a height of more than 2 meters above the lower reference plane is classified as working at height. Therefore, all work performed at a height of more than 2 meters must comply with the NR 35 guidelines, including implementing safe operating procedures and using appropriate personal protective equipment (PPE) or collective protective equipment (CPE).

[0008] A key factor that needs special attention in working at heights is complacency. When workers become accustomed to their work environment and feel comfortable with the status quo, they often reduce their awareness of potential hazards or risks in the work environment.

[0009] In the logistics industry, for example, ladders are typically used to assist drivers and workers in accessing the interior of truck beds for loading and unloading operations. However, current technology indicates that common ladders are not designed for effective anchoring to the truck bed structure, nor are they equipped with extensions to allow access to the interior. Therefore, in many cases, workers rely on the truck bed's own structure to climb out of the cabin.

[0010] Based on the aforementioned technical background, and with the passage of time and the accumulation of experience, it has been demonstrated that the design of multifunctional ladders is developing towards innovation and improvement. This utility model provides a multifunctional ladder with several significant advantages, and its design is extremely practical and efficient. Its unique structural design eliminates known defects in existing technologies, which are reflected in this patent. Utility Model Content

[0011] To address the aforementioned problems, the inventors have filed a utility model patent application entitled "Multifunctional Ladder." The core objective of this patent is to develop an innovative multifunctional ladder with high mobility, equipped with a locking device and manual / automatic operating guide ropes. This product stands out in the consumer market due to its unique design and usage features, offering advantages such as low cost, high strength, and high efficiency.

[0012] With years of experience and a commitment to innovation and practical solutions that make their products stand out from the competition, the inventors developed this simple yet efficient product that overcomes all the limitations and shortcomings mentioned in existing technologies with extremely high security.

[0013] A multi-functional ladder includes a base equipped with four tires, a small protruding rung at the front end, and two support rods at the rear end, with casters at the bottom of the support rods;

[0014] A fixed ladder is fixedly installed at the front end of the base near the small protruding step; a first shaft is installed on each side of the base, and the end of a manual operating lever is fixed on the first shaft. The operating lever consists of two arms connected by a horizontal bar; a small vertical bar is installed at the lower end of the operating lever near the first shaft.

[0015] The fixed ladder has two retractable handrails in the middle, and the top of the retractable handrails is connected to a top platform. The top platform is equipped with side railings and an entrance door, and is fixedly connected to a parallel movable ladder located at the rear of the fixed ladder.

[0016] Each arm of the manually operated lever is equipped with a connecting rod in the middle that is connected to the front end of the articulated arm. The middle of the articulated arm is fixed to the top of the fixed ladder via a second axis. The other end of the articulated arm is connected to a short free arm that extends downward via a third axis. The bottom of the free arm is provided with a lower support.

[0017] The movable ladder is equipped with a step locking system, which includes a shaft rod installed on the penultimate step of the movable ladder. A movable arm with a spring extends from the bottom of the shaft rod. The front end of the movable arm is provided with a small front support, and the rear end is connected to the last step of the movable ladder through a rear hinge.

[0018] The ladder is also equipped with a locking system for the operating lever, which consists of two movable rods and cutouts thereon, mounted on a vertical structure extending from the base to the middle area of ​​the fixed ladder.

[0019] The top platform is equipped with height-adjustable lateral hinge rods and a set of rear support rods secured by lateral support rods to reinforce and stabilize the top platform.

[0020] According to this utility model, the product consists of a multi-functional ladder with wheels at the bottom, a locking device, and a guide rope for manual and / or automatic operation, for adjusting the required height, with a design height range of 2 to 10 meters.

[0021] This ladder features a safe working platform at the top for work at heights. It is also equipped with safety devices, including handrails, to meet the requirements of NR 12 regulations.

[0022] One of the key advantages of this product is its ability to provide safe and ergonomic working solutions for various applications. These applications include: construction and electrical industries, gutter maintenance, light fixture replacement, safety lifeline installation, panel installation, painting, drywall and ceiling installation, building exterior cleaning, and cleaning the cabs and roofs of trucks, buses, and trailers.

[0023] In the logistics field, the ladder's structural design offers multiple configurations to improve ergonomic conditions and the working environment during grain silo unloading operations, while optimizing the operation of covering and opening the truck bed. Furthermore, the ladder can be secured to the truck bed structure via chains or ratchet straps, making it easier for personnel to enter the truck bed.

[0024] In addition to being easy to transport, the ladder is designed to accommodate different height requirements, greatly improving its flexibility of use.

[0025] It should be clarified that the description of this utility model patent is merely exemplary and does not limit the details, dimensions, functions, and operating steps described. The design of this patent can be implemented in various forms and operated in various ways. As long as it does not deviate from the core innovative points of the utility model, its scope of protection is included within the patent rights applied for. Attached Figure Description

[0026] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0027] Figure 1 This is a perspective view of the ladder;

[0028] Figure 2 This is a perspective view of the ladder in operation.

[0029] Figure 3 This is another perspective view of the ladder during operation;

[0030] Figure 4 This is a perspective view of the ladder; in this view, you can see the locking mechanism between the rungs.

[0031] Figure 5 A perspective detail of the ladder;

[0032] Figure 6 This is a perspective detail of the ladder; in this view, you can observe that as the lever is operated, the moving ladder slides upwards, while the moving arm with a return spring slides from behind the rungs of the fixed ladder.

[0033] Figure 7 This is a perspective detail of the ladder; in this view, the movable arm with the spring-loaded mechanism and its small front support almost pass through the rungs.

[0034] Figure 8 This is a perspective detail of the ladder; in this view, the movable arm with the spring-loaded mechanism and its small front support have completely passed through the rungs of the fixed ladder.

[0035] Figure 9This is a perspective detail of the ladder; it also shows the movable arm with the spring-loaded mechanism and its small front support completely passing through the fixed ladder rungs.

[0036] Figure 10 A perspective detail of the lever locking device;

[0037] Figure 11 This is a perspective detail of the lever locking device; in this view, you can see that the notched rod is embedded in the lever.

[0038] Figure 12 A perspective detail of the tire locking mechanism;

[0039] Figure 13 This is a perspective view of the ladder; in this view, you can see that the side and rear bars of the ladder have been extended to reinforce the platform's support.

[0040] Figure 14 This is a perspective view of the ladder; in this view, the platform and its open door can be observed.

[0041] Figure 15 This is a perspective view of the ladder;

[0042] Figure 16 A perspective view of the lever;

[0043] Figure 17 Perspective view of the base with four tires;

[0044] Figure 18 For the past Figure 17 Corresponding side view;

[0045] Figure 19 Perspective view of a fixed ladder;

[0046] Figure 20 Perspective view of the moving ladder;

[0047] Figure 21 Perspective view of a fixed ladder with levers;

[0048] Figure 22 For the past Figure 21 Corresponding side view;

[0049] Figure 23 For the past Figure 21 The corresponding front view;

[0050] Figure 24 A perspective view of the platform;

[0051] Figure 25 This is a front view of the lateral hinge rod;

[0052] Figure 26A perspective view for locking the system;

[0053] Figure 27 For the past Figure 26 The corresponding side view.

[0054] Figure label:

[0055] 1-Base; 2-Tire; 3-Protruding step; 4-Support rod; 5-Cast; 6-Fixed ladder; 7-First axle; 8-Arm; 9-Horizontal bar; 10-Vertical bar; 11-Telescopic handrail; 12-Top platform; 13-Side railing; 14-Entrance door; 15-Moving ladder; 16-Connecting rod; 17-Hinged arm; 18-Second axle; 19-Third axle; 20-Free arm; 21-Lower support; 22-Staff member; 23-Pintosh step; 24-Rebound spring; 25-Front support member; 26-Rear hinge member; 27-Last step; 28-Moving rod; 29-Slit; 30-Vertical structure; 31-Side hinge rod; 32-Rear support rod; 33-Horizontal support rod;

[0056] A - Operating lever; E - Ladder. Detailed Implementation

[0057] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0058] A specific embodiment of this utility model is as follows: Figure 1 , Figure 6 and Figure 17 As shown, a multi-functional ladder is disclosed, including a ladder E, which includes a base 1 equipped with four tires 2, and a small protruding rung 3 at the front end of the base 1. Two support rods 4 with casters 5 are designed at the rear end of the base 1.

[0059] like Figure 1 , Figure 15 and Figure 19 As shown, a fixed ladder 6 is installed at the front of the base 1, near the protruding step 3; as Figure 2 and Figure 15 As shown, a first shaft 7 is provided on both sides of the base 1, and the first shaft 7 fixes the end of the manual operation lever A. Combined with... Figure 2 , Figure 5 , Figure 15 and Figure 16 As shown, the manual operating lever A includes two arms 8, which are connected at their other ends by a crossbar 9. A small vertical bar 10 is also provided at the lower end of the operating lever A near the first shaft 7.

[0060] Combination Figure 3 , Figure 13 , Figure 14 , Figure 15 and Figure 24 As shown, two retractable handrails 11 are installed in the center of the fixed ladder 6, with their tops connected to a top platform 12. The top platform 12 is equipped with side railings 13 and an entrance door 14, and is fixed to a movable ladder 15. The movable ladder 15 is arranged parallel to the fixed ladder 6 and is located behind it.

[0061] Combination Figure 4 , Figure 16 , Figure 20 , Figure 21 , Figure 22 and Figure 23 As shown, a connecting rod 16 is fixed in the middle of each arm 8 of the manually operated lever A, and the upper end of these connecting rods 16 is connected to the front end of the hinged arm 17. The center position of the hinged arm 17 is fixed to a second shaft 18, which is located at the end of the top of the fixed ladder 6. The other end of the hinged arm 17 is connected via a third shaft 19 to a small, downwardly extending free arm 20, the bottom of which is equipped with a lower support 21.

[0062] Combination Figure 7 , Figure 8 , Figure 9 , Figure 12 , Figure 26 and Figure 27 As shown, the movable ladder 15 is also equipped with a locking system between the steps, which includes a rod 22 with an axle fixed to the penultimate step 23 of the movable ladder 15. The rod 22 extends downward to connect to a movable arm with a return spring 24. The movable arm is equipped with a small front support 25 and is fixedly connected at its end to the last step 27 of the movable ladder 15 via a small rear hinge 26.

[0063] like Figure 10 and Figure 11 As shown, ladder E is also equipped with a locking system for securing the operating lever A, which consists of two small movable rods 28 with notches 29. These movable rods 28 are mounted on a vertical structure 30, which extends from the base 1 to the middle of the fixed ladder 6.

[0064] Combination Figure 1 , Figure 15 , Figure 17 , Figure 18 and Figure 25As shown, the top platform 12 is equipped with a lateral hinge rod 31 that can be individually adjusted in height, as well as a reinforcement structure consisting of multiple rear rods 32 and a transverse support rod 33, to enhance the stability and support capacity of the top platform 12.

[0065] The ladder E is operated by operating lever A from a vertical position downwards. This operation causes the connecting rod 16, connected to the hinged arm 17, to drive the small free arm 20, embedding its lower support 21 into the bottom area of ​​the steps of the movable ladder 15, thereby pushing the movable ladder upwards. Simultaneously, the top platform 12 is raised synchronously via the telescopic handrail 11. During this upward movement, the movable arm 24 with a return spring gradually supports the surface of the steps of the fixed ladder 6 through its small front support 25, thereby completing the locking between the steps.

[0066] When the ladder reaches the desired height, the operating lever A returns to the vertical position and is locked by two small movable rods 28 with notches 29. At the same time, the vertical rod 10 at the bottom of the lever contacts the front tire 2, thereby locking it as well.

[0067] For safety reasons, the top platform 12 is also additionally supported and locked by height-adjustable lateral hinge rods 31, as well as rear support rods 32 and lateral support rods 33.

[0068] Although one form of the present invention has been shown and described, other forms will be apparent to those skilled in the art. Therefore, it is understood that the embodiments shown in the accompanying drawings and described above are for illustrative purposes only and are not intended to limit the scope of protection of this invention, which is defined by the claims.

Claims

1. A multifunctional ladder, characterized in that: The ladder (E) includes a base (1) equipped with four tires (2), a small protruding step (3) at the front end, and two support rods (4) at the rear end, with casters (5) at the bottom of the support rods (4). A fixed ladder (6) is fixedly installed at the front end of the base (1) near the small protruding step (3); a first shaft (7) is installed on each side of the base (1), and the end of a manual operating lever (A) is fixed on the first shaft (7). The operating lever (A) consists of two arms (8), which are connected by a crossbar (9); a small vertical bar (10) is installed near the first shaft (7) at the lower end of the operating lever (A). The fixed ladder (6) has two retractable handrails (11) in the middle. The top of the retractable handrails (11) is connected to a top platform (12). The top platform (12) is equipped with side rails (13) and an entrance door (14), and is fixedly connected to a parallel movable ladder (15) located behind the fixed ladder (6). Each arm (8) of the manual operating lever (A) is equipped with a connecting rod (16) connected to the front end of the hinge arm (17) in the middle. The middle of the hinge arm (17) is fixed to the top of the fixed ladder (6) via a second shaft (18). The other end of the hinge arm (17) is connected to a short free arm (20) extending downward via a third shaft (19). The bottom of the free arm (20) is provided with a lower support (21). The movable ladder (15) is equipped with a step locking system, which includes a shaft rod (22) mounted on the penultimate step (23) of the movable ladder (15), and a movable arm with a spring-loaded spring (24) extending from the lower part of the shaft rod (22). The movable arm has a small front support (25) at the front end and is connected to the last step (27) of the movable ladder (15) at the rear end via a rear hinge (26). The ladder (E) is also equipped with a locking system for the operating lever (A), which consists of two movable rods (28) and cutouts (29) thereon, mounted on a vertical structure (30) extending from the base (1) to the middle area of ​​the fixed ladder (6); The top platform (12) is equipped with a height-adjustable lateral hinge rod (31) and a set of rear support rods (32) fixed by a transverse support rod (33) to reinforce and stabilize the top platform (12).

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