A portable folding boarding stair

Abstract

The utility model relates to the technical field of aircraft auxiliary equipment, disclose a portable folding boarding ladder, include: the ladder body includes a plurality of ladder sections and a plurality of joint lock catch, a plurality of ladder sections are linear arrangement, a plurality of joint lock catch are connected between the main beam of two adjacent ladder sections respectively, two suspension hooks are arranged on the main beam of end ladder section respectively, each suspension hook includes the connecting plate of setting ladder section main beam, support plate and connecting hook, support plate is rotatably connected on the connecting plate, support plate is equipped with the locking piece of being connected with the connecting plate, and the connecting hook is set in the end of support plate, the folding boarding ladder can realize the state conversion of " straight ladder " " corner ladder " etc. Quickly, flexible avoidance of the outstanding object such as canard, air intake, antenna, suitable for a variety of models multiple scene rescue requirements. When using, adjust the suspension hook and boarding ladder length in advance, connect the suspension hook with the aircraft, ensure that the lap is stable, the rescuer boards the aircraft, and implements rescue.

Description

Technical Field

[0001] This utility model relates to the field of aircraft auxiliary equipment technology, and in particular to a portable folding boarding ladder. Background Technology

[0002] Aircraft boarding stairs are devices used to facilitate the boarding or evacuation of aircraft and for aircraft relocation, and are one of the important pieces of equipment for aircraft ground support. Traditional aircraft boarding stairs are mainly external fixed boarding stairs, which usually cannot be folded and stored, resulting in large size and inconvenience in carrying.

[0003] To address this, existing technologies have developed some foldable boarding ladders. While these boarding ladders can extend to fit the aircraft cabin and connect to it when in use, and fold up for easy storage and transport when not in use, their extended state is mostly fixed, making it difficult to connect to different aircraft models. In particular, when an aircraft makes an emergency landing at the airport due to an accident, the foldable boarding ladder may fail to connect effectively to the aircraft due to interference from protrusions such as canards, air intakes, and antennas caused by cabin deformation or malfunctioning hatches, potentially preventing the pilot from escaping the aircraft in time.

[0004] Therefore, there is an urgent need to develop portable boarding ladders that are lightweight, sturdy, have high load-bearing capacity, can be quickly deployed, and can be adapted to rescue scenarios involving multiple aircraft models for use by medical personnel. Utility Model Content

[0005] This utility model proposes a portable folding boarding ladder to overcome the shortcomings of the prior art. The portable folding boarding ladder can quickly switch between "straight ladder" and "corner ladder" modes, flexibly avoid protrusions such as canards, air intakes, and antennas, and is suitable for rescue requirements of various aircraft models and scenarios.

[0006] The technical solution of this utility model is: a portable folding boarding ladder, comprising:

[0007] The ladder body includes multiple ladder segments and multiple joint locks. The multiple ladder segments are arranged linearly, and the multiple joint locks are respectively connected between the main beams of two adjacent ladder segments. The joint locks are used to lock the rotational position of the two ladder segments and to allow the multiple ladder segments to fold around the joint locks.

[0008] Two suspension hooks are respectively installed on the two main beams of the end stair section. Each suspension hook includes a connecting plate, a support plate and a connecting hook for the main beam of the stair section. The support plate is rotatably connected to the connecting plate. The support plate is provided with a locking member connected to the connecting plate. The locking member is used to lock the position of the connecting plate and the support plate. The connecting hook is located at the end of the support plate.

[0009] In at least one embodiment of the present invention, the joint latch includes a latch plate and a connecting pin. The latch plate has longitudinal through grooves on both sides. Multiple locking holes are arranged in an arc shape in both through grooves. The main beams of two adjacent stair sections are respectively hinged in the two through grooves. The main beams of the stair section are provided with connecting holes corresponding to the locking holes. A connecting pin passes through one of the locking holes and the connecting hole.

[0010] In at least one embodiment of the present invention, both the connecting plate and the support plate are provided with a plurality of corresponding first insertion holes in an arc shape. A pin is inserted into one of the first insertion holes on the connecting plate and the support plate. The end of the support plate away from the connecting plate is provided with a strip tooth. The connecting hook includes a rack that meshes with the strip tooth and an L-shaped angle piece that is bolted to the bottom end of the rack. The rack is bolted to the support plate.

[0011] In at least one embodiment of this utility model, two handrails are provided opposite to each other on the two main beams of the upper stair section. Two connecting seats are provided on each main beam of the stair section. Each handrail includes two handrail support beams with their ends respectively hinged to the two connecting seats and a handrail rod hinged to the end of the two handrail support beams away from the connecting seats. Both the connecting seats and the handrail support beams are provided with corresponding second insertion holes, and pins are inserted into the two second insertion holes.

[0012] In at least one embodiment of this utility model, the lengths of the plurality of stair sections are equal, and the length of the handrail is greater than the length of the stair section.

[0013] In at least one embodiment of this utility model, all of the multiple ladder sections are made of lightweight, high-strength aerospace materials.

[0014] In at least one embodiment of this utility model, omnidirectional wheels are provided on both main beams of the lowest stair section, and anti-slip blocks are provided at the ends of the main beams of the lowest stair section.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model proposes a portable folding boarding ladder. Multiple ladder sections are connected using joint locks that can be rotated and locked in position. Suspension hooks, consisting of connecting plates, support plates, and connecting hooks, are installed at the ends of each ladder section. When performing rescue missions, the folding boarding ladder is pushed to the rescue location. Depending on the aircraft model and the emergency landing situation, the bending state of each ladder section can be quickly converted to "straight ladder" or "corner ladder" using the joint locks, flexibly avoiding protrusions such as canards, air intakes, and antennas. Subsequently, depending on the aircraft cockpit situation, the state of the hooks is adjusted using locking components to ensure the suspension hooks are securely connected to the aircraft's internal beams. Rescuers can then board the aircraft to carry out the rescue. Compared with existing technologies, this folding boarding ladder is small in size, easy to carry, and can quickly convert between "straight ladder" and "corner ladder" states, flexibly avoiding protrusions such as canards, air intakes, and antennas, achieving a secure connection with the aircraft. It is suitable for various aircraft models and rescue scenarios, enabling pilots to evacuate the aircraft in a timely manner during emergency landings.

[0017] 2. This utility model features a folding handrail on the ladder section. When rescuers are about to board the aircraft and need to operate the ladder, the handrail can be raised to protect them. When not in use, the handrail can be folded up. In addition to saving space and improving portability, since the length of the handrail is greater than the length of the ladder section, the handrail can also be used as a handle to pull the boarding ladder in the folded state, which is beneficial for quickly reaching the rescue location when there are few operators. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the joint locking structure of this utility model;

[0020] Figure 3 This is a schematic diagram showing the detailed structure of the suspension hook of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the handrail part of this utility model;

[0022] Figure 5 This is a schematic diagram showing the detailed structure of the connecting seat and handrail support beam of this utility model;

[0023] Figure 6 This is a schematic diagram of the installation structure of the anti-slip block and universal wheel of this utility model in the ladder section;

[0024] Figure 7 This is a schematic diagram of the overall structure of the present invention in its folded state.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Ladder body; 11. Ladder flight; 111. Connecting seat; 112. Anti-slip block; 113. Caster wheel; 12. Joint lock; 121. Locking plate; 122. Connecting pin; 123. Through groove; 2. Suspension hook; 21. Connecting plate; 211. First insertion hole; 22. Support plate; 23. Connecting hook; 231. Rack; 232. L-shaped angle bracket; 3. Handrail; 31. Handrail support beam; 311. Second insertion hole; 32. Handrail bar. Detailed Implementation

[0027] The accompanying drawings in this invention are not strictly drawn to scale, and the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," "lower," "far," "near," "front," and "rear" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Aircraft often rely on external boarding ladders, which are usually fixed structures that cannot be folded and stored, resulting in large size and inconvenience in carrying. Furthermore, special ladders are required for different aircraft models, increasing the burden on ground crew.

[0031] In addition, when on temporary missions or when parking at airports without supporting facilities, the lack of suitable boarding stairs can affect the efficiency of flight crew members entering and exiting. Some aircraft models have tried to bring their own boarding stairs, but it is necessary to balance portability, storage space and structural strength.

[0032] In addition, among all Class I flight accidents, approximately 28.6% involve pilots who are unable to exit the aircraft in time and die after an emergency landing at the airport due to reasons such as cockpit deformation, canopy malfunction, pilot unconsciousness, or incapacitation. In such cases, the primary issue for medical rescue personnel is to quickly board the aircraft to provide rescue and assist the pilot in exiting the cockpit.

[0033] In view of this, this utility model proposes a portable folding boarding ladder. This folding boarding ladder can quickly switch between "straight ladder" and "corner ladder" modes, flexibly avoiding protrusions such as canards, air intakes, and antennas, and is suitable for rescue requirements of various aircraft models and scenarios. In use, the length of the suspension hook and boarding ladder should be adjusted in advance, and the suspension hook should be connected to the aircraft. After ensuring a secure connection, rescue personnel can board the aircraft to carry out the rescue.

[0034] Combination Figures 1 to 7 As shown, a portable folding boarding ladder includes:

[0035] The ladder body 1 includes multiple ladder segments 11 and multiple joint locks 12. The multiple ladder segments 11 are arranged linearly, and the multiple joint locks 12 are respectively connected between the main beams of two adjacent ladder segments 11. The joint locks 12 are used to lock the rotation position of the two ladder segments 11 and to fold the multiple ladder segments 11 around the joint locks 12.

[0036] Two suspension hooks 2 are respectively installed on the two main beams of the end stair section 11. Each suspension hook 2 includes a connecting plate 21, a support plate 22 and a connecting hook 23, which are installed on the main beam of the stair section 11. The support plate 22 is rotatably connected to the connecting plate 21. The support plate 22 is provided with a locking member connected to the connecting plate 21. The locking member is used to lock the position of the connecting plate 21 and the support plate 22. The connecting hook 23 is located at the end of the support plate 22. The connecting hook 23 is connected to the main beam inside the aircraft cabin. The contact surfaces of the boarding ladder are all covered with rubber pads that can completely fit the contact points and also play a role in preventing slippage.

[0037] When in use, adjust the length of the suspension hook and boarding ladder in advance according to the aircraft model. The rescuers quickly push the folded boarding ladder to the rescue position, open the boarding ladder, connect the suspension hook to the aircraft, and ensure that the connection is secure before the rescuers board the aircraft to carry out the rescue.

[0038] As an alternative embodiment, the joint latch 12 includes a latch plate 121 and a connecting pin 122. The latch plate 121 has longitudinal through slots 123 on both sides. Multiple locking holes are arranged in an arc shape in both through slots 123. The main beams of two adjacent ladder sections 11 are respectively hinged in the two through slots 123. The main beams of the ladder section 11 have connecting holes corresponding to the locking holes. A connecting pin 122 passes through one of the locking holes and the connecting hole. The joint latch 12 can be used to achieve the required angle and can quickly realize the conversion between "straight ladder" and "corner ladder" states. It can flexibly avoid protrusions such as canards, air intakes, and antennas, and is suitable for rescue requirements of various aircraft models and scenarios.

[0039] As an alternative embodiment, both the connecting plate 21 and the support plate 22 are provided with multiple corresponding first insertion holes 211 in an arc shape. A pin is inserted into one of the first insertion holes 211 on the connecting plate 21 and the support plate 22. The end of the support plate 22 away from the connecting plate 21 is provided with a strip tooth. The connecting hook 23 includes a rack 231 that meshes with the strip tooth and an L-shaped angle 232 that is bolted to the bottom end of the rack 231. The rack 231 is bolted to the support plate 22. Different widths can be adjusted by the L-shaped angle 232, the rack 231, and the support plate 22 with strip teeth, which is suitable for different types of aircraft.

[0040] As an alternative embodiment, two handrails 3 are provided opposite to each other on the two main beams of the upper stair section 11. Two connecting seats 111 are provided on the main beams of each stair section 11. Each handrail 3 includes two handrail support beams 31 with their ends respectively hinged to the two connecting seats 111 and a handrail rod 32 hinged to the end of the two handrail support beams 31 away from the connecting seats 111. Both the connecting seats 111 and the handrail support beams 31 are provided with corresponding second insertion holes 311, and pins are inserted into the two second insertion holes 311. The design of the handrails 3 can save space when folded and protect rescuers when they are about to board the aircraft and need to operate them. When not in use, folding them not only saves space and improves portability, but also facilitates rapid arrival at the rescue site when there are few operators.

[0041] As an alternative embodiment, multiple stair sections 11 are of equal length, with an unfolded length of 2000mm~5500mm and a folded length of 600mm~1200mm, offering versatility. The handrail 32 is longer than the stair section 11. This invention cleverly achieves flexible height adjustment through a multi-section boarding ladder frame structure. This design allows the boarding ladder to reach a very wide length range after unfolding, between 2000mm and 5500mm. This design not only adapts to various aircraft models but also provides a stable boarding method in various emergency landing situations; such as... Figure 7As shown, in the folded state, the handrail 32 can also be used as a handle to pull the boarding ladder.

[0042] As an alternative embodiment, multiple ladder sections 11 are made of lightweight, high-strength aerospace materials, with a maximum load capacity of ≥120kg at the maximum extension length, combining high strength with lightweight design.

[0043] As an alternative embodiment, both main beams of the lowest stair section 11 are equipped with casters 113. After folding, this utility model can be moved quickly by the casters 113 at the bottom, improving rescue efficiency. The ends of the main beams of the lowest stair section 11 are equipped with anti-slip blocks 112. The design of the anti-slip blocks 112 reduces the occurrence of accidents when the ground is slippery, provides good support for the boarding ladder, and ensures that the ladder has sufficient stability when rescuers climb the ladder.

[0044] The working principle and usage method of this embodiment:

[0045] During rescue missions, rescuers would fold up the boarding ladders as follows: Figure 7 As shown, use the 113 casters to quickly push the aircraft to the rescue location. Upon arrival, unfold the casters and quickly adjust the height, angle, and suspension hooks according to the aircraft model and the emergency landing situation. Once the handrails are raised, it will appear as shown. Figure 1 As shown, after connecting the suspension hook 2 to the aircraft and ensuring a secure connection, the rescuers boarded the aircraft to carry out the rescue.

[0046] On equipment with protruding components such as canards, air intakes, and antennas, a specific angle can be achieved using the articulated latch 12, thereby enabling a quick conversion function. This conversion function includes, but is not limited to, changing the equipment from a "straight ladder" state to a "corner ladder" state, as well as various other possible configurations to adapt to different usage environments and needs.

[0047] When rescuers are about to board the aircraft and need to perform manual operations, the height above the ground increases the danger. Handrail 3 can ensure the safety of the rescuers.

[0048] The above embodiments are merely specific implementations of this utility model patent, used to illustrate the technical solution of this utility model patent, and not to limit it. The protection scope of this utility model patent is not limited thereto. Although this utility model patent has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope disclosed in this utility model. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions implemented by this utility model patent, and should all be covered within the protection scope of this utility model.

Claims

1. A portable folding boarding ladder, characterized in that, include: The ladder body (1) includes multiple ladder segments (11) and multiple joint locks (12). The multiple ladder segments (11) are arranged linearly, and the multiple joint locks (12) are respectively connected between the main beams of two adjacent ladder segments (11). The joint locks (12) are used to lock the rotational position of the two ladder segments (11) and to fold the multiple ladder segments (11) around the joint locks. Two suspension hooks (2) are respectively set on the two main beams of the end ladder section (11). Each suspension hook (2) includes a connecting plate (21), a support plate (22) and a connecting hook (23) set on the main beam of the ladder section (11). The support plate (22) is rotatably connected to the connecting plate (21). The support plate (22) is provided with a locking member connected to the connecting plate (21). The locking member is used to lock the position of the connecting plate (21) and the support plate (22). The connecting hook (23) is set at the end of the support plate (22).

2. The portable folding boarding ladder as described in claim 1, characterized in that, The joint latch (12) includes a latch plate (121) and a connecting pin (122). The latch plate (121) has longitudinal through slots (123) on both sides. Multiple locking holes are arranged in an arc shape in both through slots (123). The main beams of two adjacent ladder sections (11) are respectively hinged in the two through slots (123). The main beams of the ladder section (11) have connecting holes corresponding to the locking holes. A connecting pin (122) passes through one of the locking holes and the connecting hole.

3. A portable folding boarding ladder as described in claim 1, characterized in that, Both the connecting plate (21) and the support plate (22) are provided with a plurality of corresponding first insertion holes (211) in an arc shape. A pin is inserted into one of the first insertion holes (211) on the connecting plate (21) and the support plate (22). The end of the support plate (22) away from the connecting plate (21) is provided with a strip tooth. The connecting hook (23) includes a rack (231) that meshes with the rack tooth and an L-shaped angle (232) that is bolted to the bottom end of the rack (231). The rack (231) is bolted to the support plate (22).

4. A portable folding boarding ladder as described in claim 1, characterized in that, Two handrails (3) are provided opposite to each other on the two main beams of the upper stair section (11). Two connecting seats (111) are provided on the main beams of each stair section (11). Each handrail (3) includes two handrail support beams (31) with their ends respectively hinged to the two connecting seats (111) and a handrail rod (32) hinged to the end of the two handrail support beams (31) away from the connecting seats (111). The connecting seats (111) and the handrail support beams (31) are each provided with corresponding second insertion holes (311). Pins are inserted into the two second insertion holes (311).

5. A portable folding boarding ladder as described in claim 4, characterized in that, The lengths of the multiple stair sections (11) are equal, and the length of the handrail (32) is greater than the length of the stair section (11).

6. A portable folding boarding ladder as described in claim 1, characterized in that, All of the aforementioned ladder sections (11) are made of lightweight, high-strength aerospace materials.

7. A portable folding boarding ladder as described in claim 1, characterized in that, Both main beams of the lowest stair section (11) are equipped with casters (113), and the ends of the main beams of the lowest stair section (11) are equipped with anti-slip blocks (112).

Images