Lightweight integrally-welded folding ladder

Abstract

The utility model discloses a light-weight integrally-welded folding ladder and belongs to the field of ladders. A light-weight integrally-welded folding ladder comprises a plurality of steps, mounting seats located on the two sides of the steps and handrails located on the upper sides of the mounting seats on the outer sides. Main bodies of the steps, the mounting seats and the handrails are formed by welding and fixing a plurality of hollow profiles; the mounting seat positioned on the inner side is fixed on a wall; the steps are rotationally connected with the mounting seats, and the handrails are rotationally connected with the mounting seats, so that the folding ladder is connected into a whole. The hollow section bar is adopted, so that the overall weight of the folding ladder can be greatly reduced on the premise of ensuring the bearing strength; meanwhile, welding connection is adopted, so that the number of parts is reduced, and the assembly burden of a user is relieved.

Description

Technical Field

[0001] The utility model belongs to the field of ladders, and more specifically relates to a lightweight integrated welded folding ladder. Background Art

[0002] A folding ladder is a ladder that has one side fixed to the wall and the ladder body can be folded and placed against the wall for storage.

[0003] In order to ensure the load-bearing capacity, the existing folding ladder is made of solid steel plates and assembled by bolt connection.

[0004] However, since these folding ladders are made entirely of solid steel plates, they are very heavy, generally weighing over 90 kilograms. Lowering the ladder for use requires two or more people to operate, making it inconvenient. Furthermore, since the plates need to be joined together with bolts, these ladders require a large number of bolts to complete the entire ladder, placing a significant burden on the ladder installer. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lightweight integrated welded folding ladder, which can achieve the purpose of lightweighting the ladder body and maintaining the bearing strength.

[0006] This utility model discloses a lightweight, integrated welded folding ladder, comprising a plurality of steps, mounting blocks on either side of the steps, and a handrail located above the outer mounting blocks. The steps, mounting blocks, and handrails are all welded together from a plurality of hollow profiles. The inner mounting block is fixed to the wall. The steps and mounting blocks are pivotally connected, and the handrails and mounting blocks are pivotally connected to form the folding ladder as a whole. The use of hollow profiles significantly reduces the overall weight of the folding ladder while ensuring compressive strength. Furthermore, the use of welded connections reduces the number of components, alleviating the user's assembly burden.

[0007] As a further improvement of the present invention, the step and the mounting base are both rotatably connected via a central shaft, which is embedded in the hollow profiles of the step and the mounting base. By using non-standard parts, a larger central shaft can be selected to increase the load-bearing strength.

[0008] As a further improvement of the present invention, the step includes a step body made of a hollow profile and a central axis seat located inside and outside the step body; the central axis seat is made of a hollow profile and is directly or indirectly welded and fixedly connected to the side of the step body; the bottom end of the mounting seat is welded and fixedly connected with a connecting seat corresponding to the central axis seat, and the connecting seat is made of a hollow profile; the connecting seat and the central axis seat are connected by a central rotating shaft.

[0009] As a further improvement of the present invention, the handrail is made of a hollow profile and is connected to the upper end of the outer mounting seat through a rotating rod made of the hollow profile to serve as protection.

[0010] As a further improvement of the present invention, a non-retractable and non-foldable guardrail is fixedly provided on the upper end of the mounting seat corresponding to the uppermost step.

[0011] As a further improvement of the present invention, it also includes several telescopic support rods located on the inner mounting seat and the lower side of the step; one end of the telescopic support rod is fixedly connected to the middle part of the lower end surface of the step, and the other end is fixedly connected to the outer side of the inner mounting seat; the telescopic support rod itself has the ability to telescope to adapt to the flipping state and storage state of the folding ladder.

[0012] As a further improvement of the present invention, a frame is fixedly provided on the wall; the frame matches the uppermost step, and when the folding ladder is in the flipped state, the uppermost step is placed on the upper end of the frame.

[0013] As a further improvement of the present invention, the step includes a step body and a load-bearing seat made of a hollow profile; the load-bearing seat is nested at the inner and outer ends of the step body; the load-bearing seat is in contact with the lower end surface of the step body to provide support; the load-bearing seat is fixed to the surface of the step body by welding.

[0014] As a further improvement of the present invention, the load-bearing seat is a U-shaped seat, which is nested at both ends of the step body, is easy to assemble, and can improve the load-bearing effect.

[0015] As a further improvement to the present invention, the weld area between the load-bearing base and the lower end surface of the mounting base is larger than the weld area between the load-bearing base and the upper end surface or side surface of the mounting base. The weld points on the lower side are more susceptible to deformation and cracking, so increasing the weld area on the lower side can ensure weld strength and pressure-bearing strength.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The folding ladder is made of hollow aluminum parts, which are light in weight and convenient for one person to use. In addition, the hollow aluminum parts are profiles, which are fixed by welding. Due to the particularity of the profiles themselves and the large welding area, the connection strength is guaranteed. The folding ladder is fixed as a whole after being welded throughout the body. When the seller ships the ladder, it can be folded as a whole and shipped. The user does not need to install or splice it, making it easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the folding ladder of the utility model in the unfolded state;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the folding ladder of the present invention in the storage state;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the step and the mounting seat of the present invention;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the load-bearing seat of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the telescopic support rod of the present invention.

[0023] Description of the numbers in the figure:

[0024] Step 1, step body 11, load-bearing seat 12, central axis seat 13, mounting seat 2, connecting seat 21, handrail 3, telescopic support rod 4. DETAILED DESCRIPTION

[0025] Specific embodiment 1: Please refer to Figure 1-Figure 5 A lightweight integrated welded folding ladder comprises a plurality of steps 1, mounting seats 2 on both sides of the steps 1, a handrail 3 on the upper side of the outer mounting seats 2, and a plurality of telescopic support rods 4 on the lower side of the inner mounting seats 2 and the steps 1.

[0026] The mounting bases 2 are all made of a skeleton of several hollow steel profiles; among them, the mounting base 2 located on the inner side is fixedly connected to the inner side of the step 1 through a welding process and is equipped with screws for easy installation on the wall; while the mounting base 2 located on the outer side is fixedly connected to the outer side of the step 1 through a welding process.

[0027] Step 1 includes a step body 11 made of a hollow steel profile and a central axis seat 13 located inside and outside the step body 11. The central axis seat 13 is also made of a hollow steel profile and is directly or indirectly fixed to the side of the step body 11 through a welding process. Correspondingly, the bottom end of the mounting seat 2 is fixedly connected to a connecting seat 21 corresponding to the central axis seat 13 through a welding process. The connecting seat 21 and the central axis seat 13 are connected by a rotating shaft to ensure the rotational connection between the step 1 and the mounting seat 2. The connecting seat 21 and the central axis seat 13 are both made of hollow steel profiles. Compared with the hinged rotation connection of existing folding ladders, the advantage is that the hinge, as a standard component, has a smaller rotating shaft diameter within a specified installation area, while the inner diameter of the hollow profile can be selected to be larger, making the central axis diameter thicker and improving the strength of the rotating part.

[0028] The armrest 3 is made of a hollow steel profile and is connected to the upper end of the outer mounting seat 2 through a rotating rod also made of a hollow steel profile, ensuring that the user can flip up the armrest 3 as a protective member when in use.

[0029] One end of the telescopic support rod 4 is fixedly connected to the middle portion of the lower end surface of the step 1, while the other end is fixedly connected to the outer side of the inner mounting seat 2. The telescopic support rod 4 is capable of extension and contraction to accommodate the folding ladder's reversing and stowing positions. It also serves as a support member, providing a certain amount of support when the folding ladder is in the reversing position. The telescopic support rod 4 itself is a conventional technical means and will not be described in detail here.

[0030] Specific embodiment 2: Based on the specific embodiment 1, a non-retractable and non-foldable guardrail is fixedly provided on the upper end of the mounting seat 2 corresponding to the uppermost step 1.

[0031] Specific embodiment 3: Based on specific embodiment 1 or 2, a frame is further fixedly installed on the wall. The frame matches the uppermost step 1. When the folding ladder is in the flipped state, the uppermost step 1 rests on the upper end of the frame to ensure that the entire folding ladder is more firmly supported.

[0032] Specific embodiment 4: Based on any one of specific embodiments 1 to 3, the step 1 further includes a load-bearing seat 12; the load-bearing seat 12 is nested between the inner and outer ends of the step body 11, and the load-bearing seat 12 abuts against the lower end surface of the step body 11 to provide support. Preferably, the load-bearing seat 12 is a U-shaped prefabricated component to facilitate nesting at both ends of the step body 11. The step body 11 itself is a hollow profile, so the load-bearing seats 12 are placed on both sides to enhance its load-bearing capacity and prevent deformation. The load-bearing seat 12 is fixedly connected to the step body 11 through a welding process, while the central axis seat 13 in this embodiment is fixedly connected to the outer end of the load-bearing seat 12 through a welding process. Preferably, the number of welds between the upper side of the load-bearing seat 12 and the step body 11 is less than the number of welds between the lower side of the load-bearing seat 12 and the step body 11. This is done to ensure welding strength and load-bearing strength while saving solder. Because the welds on the lower side are more susceptible to deformation and cracking, the weld area is larger.

[0033] The folding ladder of the present application is used as follows: when the ladder is not in use, the steps 1 are flipped inwardly toward the wall, the handrails 3 are flipped toward the mounting base 2, and the telescopic support rods 4 are extended. In this state, the ladder is in a stowed position, with the steps 1 attached to the wall surface, and the ladder does not take up space. When the ladder is needed, the steps 1 are flipped outwardly until they are parallel to the ground, and the handrails 3 are flipped to provide protection. At this point, the ladder is in a normal state, allowing people to go up and down.

Claims

1. A lightweight integrated welded folding ladder, characterized by: The folding ladder comprises a plurality of steps (1), mounting seats (2) located on both sides of the steps (1), and a handrail (3) located on the upper side of the outer mounting seat (2); the main bodies of the steps (1), the mounting seat (2), and the handrail (3) are all made of a plurality of hollow profiles welded and fixed; the mounting seat (2) located on the inner side is fixed on the wall; the steps (1) and the mounting seat (2) are rotatably connected, and the handrail (3) and the mounting seat (2) are rotatably connected, so that the folding ladder is connected as a whole.

2. A lightweight integrated welded folding ladder according to claim 1, characterized in that: The step (1) and the mounting seat (2) are both rotatably connected via a rotating shaft; the rotating shaft is embedded in the hollow profiles of the step (1) and the mounting seat (2).

3. The lightweight integrated welded folding ladder according to claim 2, characterized in that: The step (1) comprises a step body (11) made of a hollow profile and a center axis seat (13) located inside and outside the step body (11); the center axis seat (13) is made of a hollow profile and is directly or indirectly welded and fixedly connected to the side of the step body (11); the bottom end of the mounting seat (2) is welded and fixedly connected to a connecting seat (21) corresponding to the center axis seat (13), and the connecting seat (21) is made of a hollow profile; the connecting seat (21) and the center axis seat (13) are connected via a rotating shaft.

4. The lightweight integrated welded folding ladder according to claim 1, characterized in that: The handrail (3) is made of a hollow profile and is connected to the upper end of the outer mounting seat (2) via a rotating rod made of the hollow profile to serve as a protective member.

5. The lightweight integrated welded folding ladder according to claim 1, characterized in that: A non-retractable and non-foldable guardrail is fixedly provided on the upper end of the mounting seat (2) corresponding to the uppermost step (1).

6. The lightweight integrated welded folding ladder according to claim 1, characterized in that: The folding ladder further comprises a plurality of telescopic support rods (4) located between the inner mounting seat (2) and the lower side of the step (1); one end of the telescopic support rod (4) is fixedly connected to the middle portion of the lower end surface of the step (1), while the other end thereof is fixedly connected to the outer side of the inner mounting seat (2); the telescopic support rod (4) itself has telescopic capability to adapt to the flipping state and the storage state of the folding ladder.

7. The lightweight integrated welded folding ladder according to claim 1, characterized in that: A frame is also fixedly provided on the wall; the frame matches the uppermost step (1), and when the folding ladder is in the flipped state, the uppermost step (1) rests on the upper end of the frame.

8. The lightweight integrated welded folding ladder according to claim 1, characterized in that: The step (1) comprises a step body (11) made of a hollow profile and a load-bearing seat (12); the load-bearing seat (12) is nested at the inner and outer ends of the step body (11); the load-bearing seat (12) is fitted and abutted against the lower end surface of the step body (11) to provide support; the load-bearing seat (12) is fixedly connected to the surface of the step body (11) by welding.

9. The lightweight integrated welded folding ladder according to claim 8, characterized in that: The load-bearing seat (12) is a U-shaped seat, which is nested at both ends of the step body (11).

10. The lightweight integrated welded folding ladder according to claim 8, characterized in that: The welding area between the load-bearing seat (12) and the lower end surface of the mounting seat (2) is larger than the welding area between the load-bearing seat (12) and the upper end surface or side surface of the mounting seat (2).

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