Triple-folding ramp ladder

Abstract

The utility model discloses a triple folding ramp ladder, which comprises a left ladder part, a middle ladder part and a right ladder part, the left ladder part, the middle ladder part and the right ladder part respectively comprise two cross beams and a plurality of cross arms fixedly connected between the two cross beams, and the cross arms are uniformly arranged at intervals; the tail end of the top of the cross beam is bent downwards to be provided with a lapping hook which is used for being lapped on a cargo bucket of a truck. Meanwhile, a left bed board is fixedly mounted at the top of the left side of the left ladder part, and a right bed board is fixedly mounted at the top of the right side of the right ladder part; the device is simple in structure and convenient to operate; when the ladder is used, the left ladder part, the middle ladder part and the right ladder part can be unfolded, and then fixing bolts are mounted in the fixing holes, so that the ladder is convenient to use; when the folding ladder is stored, the left ladder part, the middle ladder part and the right ladder part are folded, so that the folding ladder is convenient to carry and store.

Description

Technical Field

[0001] The utility model relates to the field of ramp ladders, in particular to a three-folding ramp ladder. Background Art

[0002] If there is no established loading and unloading platform at the logistics site, as a remedial measure, trucks, trailers, etc. are usually equipped with ramps at the rear of the vehicle.

[0003] For example, the patent with authorization announcement number CN213442244U discloses a high-load-bearing, multifunctional, heavy-duty ramp ladder, which belongs to the field of vehicle auxiliary equipment. It includes a ramp ladder body, and its structural features are: it also includes anti-slip ribs, a fixed card plate, and a clamping mechanism. The anti-slip ribs are arranged on the upper surface of the ramp ladder body, the fixed card plate is arranged at the upper end of the ramp ladder body, and the clamping mechanism is mounted on the fixed card plate. The fixed card plate is arranged in an L-shaped structure. The fixed card plate includes a horizontal card plate and a vertical card plate. The horizontal card plate is arranged at the upper end of the ramp ladder body, and the vertical card plate is connected to the horizontal card plate.

[0004] The above patent fixes the fixed plate through a clamping mechanism to prevent the ramp ladder body from shifting when loading and unloading goods or towing; however, the disadvantage of the above patent is that generally speaking, at least two ramp ladders are required behind the vehicle to meet the usage requirements, and these two ramp ladders need to be taken and stored separately, which is more inconvenient.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the present utility model is to provide a three-fold ramp ladder to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A three-fold ramp ladder comprises a left ladder component, a middle ladder component and a right ladder component, wherein the left ladder component, the middle ladder component and the right ladder component each comprise two cross beams and a plurality of cross arms fixedly connected between the two cross beams, and the plurality of cross arms are evenly spaced; the top ends of the cross beams are bent downwardly and provided with hooks, which are used to overlap on the cargo box of a truck; at the same time, a left floor board is fixedly installed on the left top of the left ladder component, and a right floor board is fixedly installed on the right top of the right ladder component; the tops of the left ladder component and the middle ladder component are rotatably connected by at least three evenly spaced first hinges, and the bottoms of the middle ladder component and the right ladder component are rotatably connected by at least three evenly spaced second hinges; the left ladder component, the middle ladder component and the right ladder component are on the upper A storage locking structure is also provided; the storage locking structure includes a locking hook and a locking screw, wherein one end of the locking hook is rotatably connected to the outer side of the beam by a fixing screw, and the other end of the locking hook is integrally formed with a hook portion, and a toggle piece is also provided on one side of the hook portion; the locking screw is fixedly connected to the other beam, and a gap is left between the head of the locking screw and the surface of the beam; fixing holes are opened at corresponding positions on the beams adjacent to the left ladder component and the middle ladder component, and similarly, fixing holes are opened at corresponding positions on the beams adjacent to the middle ladder component and the right ladder component. When the folding ramp ladder is unfolded, fixing bolts are installed in the fixing holes on the beams adjacent to the left ladder component and the middle ladder component; fixing bolts are installed in the fixing holes on the beams adjacent to the middle ladder component and the right ladder component.

[0009] Furthermore, the crossbeam, crossarm and hook are all made of aluminum alloy.

[0010] Furthermore, a plastic sheath is fixedly provided on the hook.

[0011] Furthermore, a storage locking structure is provided between the left ladder component and the middle ladder component. The locking hook of the storage locking structure is located on the left side of the left ladder component, and the locking screw of the storage locking structure is located on the right side of the middle ladder component.

[0012] Furthermore, a storage locking structure is provided between the middle ladder component and the right ladder component, the locking hook of the storage locking structure is located on the right side of the right ladder component, and the locking screw of the storage locking structure is located on the left side of the middle ladder component.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Simple structure and easy operation;

[0015] When in use, the left ladder component, the middle ladder component and the right ladder component can be unfolded, and then the fixing bolts are installed in the fixing holes. At this time, the left ladder component, the middle ladder component and the right ladder component are unfolded and cannot be folded, so there is no delay in use;

[0016] When the utility model is stored, the left ladder component, the middle ladder component and the right ladder component are folded for easy transportation and storage; then the left ladder component, the middle ladder component and the right ladder component are fixed by the storage locking structure to prevent them from unfolding, so as to prevent the three-fold ramp ladder from unfolding during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a structural diagram of a three-fold ramp ladder.

[0018] Figure 2 A side view of a three-fold ramp ladder.

[0019] Figure 3 A side view of a three-fold ramp ladder.

[0020] Figure 4 A side view of a three-fold ramp ladder.

[0021] Figure 5 This is a schematic structural diagram of a three-fold ramp ladder from another angle.

[0022] Figure 6 The figure is a schematic diagram of the structure of a three-fold ramp ladder when it is stored.

[0023] Figure 7 This is a schematic diagram of the structure of a three-fold ramp ladder when it is stored from another angle.

[0024] Figure 8 for Figure 1 A partial enlarged view of point A in the middle.

[0025] Figure 9 for Figure 6 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-9A three-fold ramp ladder comprises a left ladder component 1, a middle ladder component 2 and a right ladder component 3.

[0028] The left ladder component 1, the middle ladder component 2 and the right ladder component 3 each include two crossbeams 401 and a plurality of crossarms 402 fixedly connected between the two crossbeams 401, and the crossarms 402 are evenly spaced; the top end of the crossbeam 401 is bent downward to provide a hook 403, which is used to connect to the cargo box of the truck; the crossbeam 401, the crossarm 402 and the hook 403 are all made of aluminum alloy

[0029] At the same time, in this solution, a plastic sheath 404 is fixedly provided on the hook 403, and the plastic sheath 404 is used to increase the friction of the hook 403, and to enhance the friction of the ramp ladder when placed on the cargo bucket;

[0030] At the same time, a left deck 101 is fixedly installed on the left top of the left ladder component 1, and a right deck 301 is fixedly installed on the right top of the right ladder component 3; wherein the left deck 101 and the right deck 301 are used for the wheels on both sides of the cart to move;

[0031] In this embodiment, the tops of the left ladder component 1 and the middle ladder component 2 are rotatably connected by at least three evenly spaced first hinges 501, and the bottoms of the middle ladder component 2 and the right ladder component 3 are rotatably connected by at least three evenly spaced second hinges 502.

[0032] When the present solution is folded, the left ladder component 1 and the middle ladder component 2 are folded around the first hinge 501, at which time the left ladder component 1 is located above the middle ladder component 2; the middle ladder component 2 and the right ladder component 3 are folded around the second hinge 502, at which time the right ladder component 3 is located below the middle ladder component 2. At this time, the left ladder component 1, the middle ladder component 2 and the right ladder component 3 are folded and stored for easy access and storage.

[0033] At the same time, in order to prevent the left ladder component 1, the middle ladder component 2 and the right ladder component 3 from being loosened when stored; a storage locking structure 6 is also provided between the left ladder component 1 and the middle ladder component 2, and a storage locking structure 6 is also provided between the middle ladder component 2 and the right ladder component 3;

[0034] The storage locking structure 6 includes a locking hook 601 and a locking screw 602. One end of the locking hook 601 is rotatably connected to the outer side of the beam 401 via a fixing screw 603. The other end of the locking hook 601 is integrally formed with a hook portion 603, and a toggle piece 604 is also provided on one side of the hook portion 603. The locking screw 602 is fixedly connected to the other beam 401, and a gap is left between the head of the locking screw 602 and the surface of the beam 401.

[0035] When the present solution is folded, the toggle plate 604 is toggled to rotate the locking hook 601, and then the hook portion 603 is stuck in the gap between the locking screw 602 and the surface of the crossbeam 401; at this time, the adjacent left ladder component 1 and the middle ladder component 2 or the adjacent middle ladder component 2 and the right ladder component 3 cannot be opened;

[0036] Specifically, in this embodiment, the locking hook 601 of the storage locking structure 6 between the left ladder component 1 and the middle ladder component 2 is located on the left side of the left ladder component 1, and the locking screw 602 of the storage locking structure 6 is located on the right side of the middle ladder component.

[0037] For the storage locking structure 6 between the middle ladder component 2 and the right ladder component 3, the locking hook 601 of the storage locking structure 6 is located on the right side of the right ladder component 3, and the locking screw 602 of the storage locking structure 6 is located on the left side of the middle ladder component;

[0038] At the same time, in order to prevent, when the three-fold ramp ladder is unfolded, the ladder parts rotate around the hinges;

[0039] The left ladder component 1 and the middle ladder component 2 have corresponding fixing holes 7 on the adjacent crossbeams 401. Similarly, the middle ladder component 2 and the right ladder component 3 have corresponding fixing holes 7 on the adjacent crossbeams 401. When the folding ramp ladder is unfolded, fixing bolts 701 are installed in the fixing holes 7 on the adjacent crossbeams 401 on the left ladder component 1 and the middle ladder component 2; and fixing bolts 701 are installed in the fixing holes 7 on the adjacent crossbeams 401 on the middle ladder component 2 and the right ladder component.

[0040] When the utility model is used, the left ladder component 1, the middle ladder component 2 and the right ladder component 3 are unfolded, and then the fixing bolts 701 are installed in the fixing holes 7. At this time, the left ladder component 1, the middle ladder component 2 and the right ladder component 3 are unfolded and cannot be folded, so the use will not be delayed;

[0041] When the utility model is stored, the left ladder component 1, the middle ladder component 2 and the right ladder component 3 are folded, and then the left ladder component 1, the middle ladder component 2 and the right ladder component 3 are fixed by the storage locking structure 6 to prevent them from unfolding, so as to prevent the three-fold ramp ladder from unfolding during transportation.

[0042] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "left," "right," and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use, or the positions or locations commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A three-fold ramp ladder, characterized in that: The ladder comprises a left ladder component, a middle ladder component and a right ladder component, wherein the left ladder component, the middle ladder component and the right ladder component all comprise two cross beams and a plurality of cross arms fixedly connected between the two cross beams, and the cross arms are evenly spaced; the top ends of the cross beams are bent downwards and provided with a hook, which is used to overlap the cargo box of the truck; at the same time, a left floor board is fixedly installed on the left top of the left ladder component, and a right floor board is fixedly installed on the right top of the right ladder component; the tops of the left ladder component and the middle ladder component are rotatably connected by at least three evenly spaced first hinges, and the bottoms of the middle ladder component and the right ladder component are rotatably connected by at least three evenly spaced second hinges; the left ladder component, the middle ladder component and the right ladder component are also provided with storage hinges Locking structure; the storage locking structure includes a locking hook and a locking screw, wherein one end of the locking hook is rotatably connected to the outer side of the beam by a fixing screw, and the other end of the locking hook is integrally formed with a hook portion, and a toggle piece is also provided on one side of the hook portion; the locking screw is fixedly connected to the other beam, and a gap is left between the head of the locking screw and the surface of the beam; fixing holes are opened at corresponding positions on the beams adjacent to the left ladder component and the middle ladder component, and similarly, fixing holes are opened at corresponding positions on the beams adjacent to the middle ladder component and the right ladder component. When the folding ramp ladder is unfolded, fixing bolts are installed in the fixing holes on the beams adjacent to the left ladder component and the middle ladder component; fixing bolts are installed in the fixing holes on the beams adjacent to the middle ladder component and the right ladder component.

2. A three-fold ramp ladder according to claim 1, characterized in that: The crossbeam, crossarm and hook are all made of aluminum alloy.

3. The three-fold ramp ladder according to claim 1, characterized in that: The hook is also fixedly provided with a plastic sheath.

4. The three-fold ramp ladder according to claim 1, characterized in that: A storage locking structure is provided between the left ladder component and the middle ladder component. The locking hook of the storage locking structure is located on the left side of the left ladder component, and the locking screw of the storage locking structure is located on the right side of the middle ladder component.

5. The three-fold ramp ladder according to claim 1, characterized in that: A storage locking structure is provided between the middle ladder component and the right ladder component. The locking hook of the storage locking structure is located on the right side of the right ladder component, and the locking screw of the storage locking structure is located on the left side of the middle ladder component.

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