Portable emergency airstairs

Abstract

The invention discloses a portable emergency airstair, and relates to the technical field of aerospace, the portable emergency airstair comprises a stair body part and a pedal part, the stair body part can be unfolded and folded in a cockpit, the stair body part can be hung at a hatch outlet of an aircraft in an unfolded state, and the stair body part can be stored in the aircraft in a folded state; the pedal part is arranged on the side wall of the ladder body part, and the pedal part can rotate to be parallel to the axis of the ladder body part or reversely rotate to be perpendicular to the axis of the ladder body part. The portable emergency airstairs provided by the invention are small in size, light in weight, convenient to operate and free of assistance of ground personnel during use.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and particularly to a portable emergency boarding ladder. Background Art

[0002] Due to the relatively high height of the out-of-cabin position of the aircraft itself, for some current aircraft, when personnel need to get off the plane, they cannot get off independently without the assistance of ground personnel. When the personnel inside the aircraft get off the plane, they must rely on the boarding ladder carried by the ground personnel to assist. However, the boarding ladder is relatively large in both volume and weight, making it inconvenient to use.

[0003] Therefore, there is an urgent need to design a technical solution with a smaller volume and weight and without the assistance of ground personnel. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable emergency boarding ladder to solve the problems existing in the above-mentioned prior art, which is small in volume, light in weight, convenient to operate, and does not require the assistance of ground personnel when in use.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The present invention provides a portable emergency boarding ladder, including: a ladder body part, which can be deployed and retracted in the cockpit, and in the deployed state, it can be suspended at the out-of-cabin opening of the aircraft, and in the retracted state, it can be stored inside the aircraft; a footrest part, which is arranged on the side wall of the ladder body part, and the footrest part can be rotated to be parallel to the axis of the ladder body part or rotated in the opposite direction to be perpendicular to the axis of the ladder body part. The portable emergency boarding ladder of the present invention is an airborne device and is placed in the cockpit of the aircraft in the retracted state. Since the internal space of the aircraft cockpit is relatively small, in order to improve the space utilization rate, the retracted state of the present invention needs to be small in volume and light in weight.

[0007] Preferably, the ladder body part includes a plurality of folding tubes hinged in sequence, and a hook is provided at the end of the folding tube at the uppermost end, and the hook can be hooked at the out-of-cabin opening; the footrest part is provided on the side wall of the folding tube.

[0008] Preferably, a support pad is provided on one side of the ladder body part, and a fitting surface is provided on the side of the support pad away from the ladder body part. The surface of the fitting surface is coated with a protective layer. The anti-slip layer can be made of rubber with a rough surface, or the outer surface of the fitting surface made of rubber material can be directly made into a rough anti-slip structure, and the fitting surface can be fitted with the outer surface of the aircraft.

[0009] Preferably, two adjacent folding tubes are rotatably connected by a pin shaft, and a self-locking mechanism is provided at the connection position. When the folding tubes are in the deployed state, the self-locking mechanism can lock the two adjacent folding tubes.

[0010] Preferably, one end of the folding tube is provided with a male buckle, and the other end is provided with a female buckle. The first side of the male buckle of the folding tube is nested on the first side of the female buckle of the adjacent folding tube and is rotationally connected through a pin shaft. The second side of the female buckle of the folding tube is provided with the self-locking mechanism. When the folding tube is in the unfolded state, the second side of the male buckle of the folding tube can be nested on the second side of the female buckle of the adjacent folding tube and is locked by the self-locking mechanism.

[0011] Preferably, the male buckle includes a strip-shaped protrusion fixedly arranged at the end of the folding tube. The two ends of the strip-shaped protrusion are respectively the first side and the second side of the male buckle. The first side of the male buckle is provided with a hinge hole, and the second side is provided with a lock hole; the female buckle includes an extension seat fixed at the end of the folding tube far from the male buckle. The extension seat is provided with a strip-shaped groove adapted to the strip-shaped protrusion of the adjacent folding tube, and the two ends of the extension seat are respectively the first side and the second side of the female buckle. The first side of the female buckle is provided with two coaxial through holes, and the second side is provided with two coaxial self-locking holes. The strip-shaped protrusion is nested in the strip-shaped groove of the adjacent folding tube, and the first side of the male buckle is hinged to the first side of the female buckle through a pin shaft; when the folding tube is in the unfolded state, the lock hole of the male buckle is coaxial with the self-locking hole of the female buckle and is locked by the self-locking mechanism.

[0012] Preferably, the self-locking mechanism includes a lock body in a cylindrical structure. The lock body is fixed outside one of the self-locking holes of the strip-shaped groove. A lock tongue is movably inserted through the lock body. The end of the lock tongue far from the lock body is inserted into the corresponding self-locking hole, and the end of the lock tongue far from the lock body is in an inclined surface structure; a pull rod is provided at the end of the lock body far from the strip-shaped groove. The pull rod is fixedly connected to the end of the lock tongue located inside the lock body; a spring is arranged inside the lock body. One end of the spring is fixedly abutted against the end of the lock tongue close to the pull rod, and the other end is fixedly abutted against the inner wall of the end of the lock body far from the self-locking hole. The spring is sleeved on the outside of the part of the pull rod close to the lock tongue and will not interfere with the reciprocating movement of the lock tongue and the pull rod. Pulling the pull rod, or the folding tube driving the male buckle to rotate, the side wall of the lock hole presses the inclined surface structure of the lock tongue, which can make the lock tongue move synchronously to the side away from the lock hole of the male buckle, and the spring is compressed during the process; when the folding tube moves in place until the lock hole is coaxial with the self-locking hole, or the pull rod is released, under the restoring force of the spring, the lock tongue automatically resets into the self-locking hole. If the lock hole is coaxial with the self-locking hole, the end of the lock tongue is inserted into the lock hole to achieve locking. The lock body is a hollow structure, and two concave wide grooves and narrow grooves are respectively opened on the two side walls of the end of the lock body far from the strip-shaped groove. Two side walls of the pull rod are respectively provided with a wide convex and a narrow convex. The wide convex is adapted to the wide groove, and the narrow convex is adapted to the narrow groove. At this time, the pull rod can be inserted into the lock body along the wide groove and the narrow groove. The inclined surface structure of the lock tongue is located on the side close to the male buckle. Rotating the folding tube and the male buckle makes the lock tongue pass through the self-locking hole and the lock hole of the male buckle to achieve locking. Since the two side walls at the outer end of the lock body are designed with wide grooves and narrow grooves, the circumferential limit of the pull rod and the lock tongue can be realized, avoiding the change of its direction due to the folding process of the folding tube.

[0013] Preferably, the footrest part includes a footrest seat fixed on the side wall of the folding rod. A foot pedal is hinged on the footrest seat. A limiting surface is provided at the bottom of the foot pedal near the hinge point, and a limiting block is provided at the footrest seat near the hinge point. When the foot pedal rotates downward to be perpendicular to the folding rod, the limiting surface fixedly abuts against the limiting block.

[0014] Preferably, two parallel hangers are hinged at the end of the folding tube at the uppermost end, and each hanger is provided with one of the hooks at the top.

[0015] Preferably, the fitting surface of the support pad is covered with a rubber layer, and a smooth inner groove is provided at the center position of the fitting surface.

[0016] The present invention has achieved the following technical effects compared with the prior art:

[0017] The ladder body part of the present invention adopts a foldable and unfoldable structure, and finally realizes the minimum volume when retracted, and can ensure the maximum length in the unfolded state, which is convenient for storage. When not in use, it is installed in the cockpit. During use, the operator can independently unfold and mount it in the cockpit, and take it down, shrink and fold it by himself after use, without any tools and the assistance of ground personnel, and can independently complete getting on and off the plane; the footrest part can also be folded and unfolded, further reducing the overall floor space during storage and facilitating the independent operation of the on-board personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a portable emergency boarding ladder in one embodiment of the present invention;

[0020] Figure 2 For Figure 1 Another perspective view;

[0021] Figure 3 It is a schematic diagram of the retracted state of a portable emergency boarding ladder in one embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the self-locking mechanism of a portable emergency boarding ladder in one embodiment of the present invention;

[0023] Figure 5Schematic diagram of the nested connection between the male buckle and the female buckle of the portable emergency boarding ladder in one embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the limiting surface and the limiting block of the portable emergency boarding ladder in one embodiment of the present invention.

[0025] In the figure: 1 - folding tube, 2 - footrest, 3 - support pad, 4 - hook, 5 - limiting surface, 6 - limiting block, 7 - self-locking mechanism, 701 - male buckle, 702 - female buckle, 703 - lock hole, 704 - self-locking hole, 705 - lock tongue, 706 - lock body, 707 - pull rod. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] The purpose of the present invention is to provide a portable emergency boarding ladder to solve the problems existing in the above-mentioned prior art, which is small in volume and weight and does not require the assistance of ground personnel during use.

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0029] For some aircraft known to the inventor, when passengers need to disembark, it is impossible to disembark independently without ground personnel. When passengers disembark, ground personnel must be present and a boarding ladder must be transported from the ground to assist. To solve this problem, the inventor designed a portable emergency boarding ladder. Considering the correlation between weight, volume, and strength, the coordination between convenient operation and safety and reliability, the installation position space of the boarding ladder should have no interference, no obstacles, be simple and convenient to operate, be stable and reliable for getting on and off the plane, and meet the needs of single-person independent getting on and off the plane. The inventor uniquely designed a folding scheme and installed it in the cockpit. During use, the operator can independently unfold, mount, remove, contract, and fold it in the cockpit without using any tools and without the assistance of ground personnel, and can independently complete getting on and off the plane. Refer to Figures 1 to 6As shown in the figure, a portable emergency boarding ladder according to an embodiment of the present invention includes a ladder body part and a footrest part. The ladder body part can be folded and unfolded, and in the unfolded state, it can be suspended at the exit of the aircraft, and in the retracted state, it can be stored inside the aircraft; the footrest part is arranged on the side wall of the ladder body part, and the footrest part can be rotated to be parallel to the axis of the ladder body part or reversely rotated to be perpendicular to the axis of the ladder body part. Moreover, a conventional storage box can be provided, and the portable emergency boarding ladder can be smoothly and quickly stored in or taken out of the storage box. The portable emergency boarding ladder is usually installed in the storage box on a daily basis. The inner surface of the storage box is attached with vibration isolation materials and is fixed on the instrument fixing bracket on the right side of the aircraft seat by quick-release screws. When in use, it can be quickly taken out by untying the strap with one hand.

[0030] For the stability during use, in one embodiment, the ladder body part includes a plurality of folding tubes 1 hinged in sequence. A hook 4 is provided at the end of the folding tube 1 at the uppermost end. A support pad 3 is provided on one side of the ladder body part. A fitting surface is provided on the side of the support pad 3 away from the ladder body part, and an anti-slip layer is coated on the fitting surface. The fitting surface can be attached to the outer surface of the aircraft. The ladder body part is hung on the aircraft through two hooks 4 on the left and right above the ladder body part, and the support pad 3 is completely attached to the edge of the aircraft, realizing reliable fixation of the ladder body to the surface. At the same time, the fitting surface is entirely wrapped with rubber, playing a role in anti-slip and protection, and a smooth inner groove is provided at the center position of the fitting surface, which can adsorb on the side wall of the aircraft, further improving the stability of the overall device. The step distance for the operator to get on and off the aircraft is designed to be 300mm ≤ H ≤ 428mm. The footrest part of this embodiment is designed with left and right staggering. During the process of the operator getting off the aircraft, the hanging position of the ladder body part is on the left side of the cockpit, and the front and rear positions are at the seat.

[0031] In order to prevent the present invention from shaking during use and reduce potential safety hazards, a folding latch mechanism is developed, which enables the folding tube 1 to be quickly and automatically locked, reducing the operation steps and shortening the unfolding and folding time; the folding tube 1 is folded in a "Z" shape along the rotating shaft, and automatic positioning is achieved at the joints during use, and it can be freely folded in the reverse direction when retracted. Specifically, a male buckle 701 is provided at one end of the folding tube 1, and a female buckle 702 is provided at the other end. The first side of the male buckle 701 of the folding tube 1 is nested in the first side of the female buckle 702 of the adjacent folding tube 1 and is rotationally connected through a pin shaft. A self-locking mechanism 7 is provided on the second side of the female buckle 702 of the folding tube 1. When the folding tube 1 is in the unfolded state, the second side of the male buckle 701 of the folding tube 1 can be nested in the second side of the female buckle 702 of the adjacent folding tube 1 and is locked by the self-locking mechanism 7.

[0032] In a preferred embodiment, the male buckle 701 includes a strip-shaped protrusion fixedly provided at the end of the folding tube 1. The two ends of the strip-shaped protrusion are respectively the first side and the second side of the male buckle 701. The first side of the male buckle 701 is provided with a hinge hole, and the second side is provided with a locking hole 703; the female buckle 702 includes an extension seat fixed to the end of the folding tube 1 away from the male buckle 701. The extension seat is provided with a strip-shaped groove that can be adapted to the strip-shaped protrusion of the adjacent folding tube 1, so that the two adjacent folding tubes 1 form a nested connection structure with the male buckle 701 and the female buckle 702 in cooperation. The two ends of the extension seat are respectively the first side and the second side of the female buckle 702. The first side of the female buckle 702 is provided with two coaxial through holes, and the second side is provided with two coaxial self-locking holes 704. The strip-shaped protrusion is nested in the strip-shaped groove of the adjacent folding tube 1, and the first side of the male buckle 701 is hinged to the first side of the female buckle 702 through a pin shaft; when the folding tube 1 is in the unfolded state, the locking hole 703 of the male buckle 701 is coaxial with the self-locking hole 704 of the female buckle 702. The self-locking mechanism 7 of this embodiment includes a lock body 706. The lock body 706 is fixed outside one of the self-locking holes 704 of the strip-shaped groove. A lock tongue 705 is movably inserted through the lock body 706. One end of the lock tongue 705 away from the lock body 706 is inserted into the corresponding self-locking hole 704, and one end of the lock tongue 705 away from the lock body 706 is of an inclined surface structure; a pull rod 707 is fixedly provided at one end of the lock body 706 away from the strip-shaped groove. The pull rod 707 is connected to one end of the lock tongue 705 located inside the lock body 706. A spring is provided inside the lock body. One end of the spring is fixedly abutted against one end of the lock tongue 705 close to the pull rod 707, and the other end is fixedly abutted against the inner wall of one end of the lock body 703 away from the self-locking hole 704. The spring is sleeved outside the part of the pull rod 707 close to the lock tongue 705 and will not interfere with the reciprocating movement of the lock tongue 705 and the pull rod 707. Pulling the pull rod 707, or the folding tube driving the male buckle to rotate, and the side wall of the locking hole 703 pressing the inclined surface structure of the lock tongue 705 can both make the lock tongue 705 move synchronously to the side away from the locking hole 703 of the male buckle, and the spring is compressed during the process;When the folding tube moves to the position where the locking hole 703 and the self-locking hole 704 are coaxial, or the pull rod 707 is released, the locking tongue 705 automatically returns to the self-locking hole 704 under the restoring force of the spring. If the locking hole 703 and the self-locking hole 704 are coaxial at this time, the end of the locking tongue 705 passes through the self-locking hole 704 and is inserted into the locking hole 703 to achieve locking. Pulling the pull rod 707 can achieve unlocking. When the pull rod 707 is pulled outward to unlock, the locking tongue 705 needs to be kept away from the self-locking hole. At this time, the pull rod 707 can be manually rotated 90 degrees so that the pull rod 707 The wide protrusion and narrow protrusion of 07 are respectively misaligned with the wide groove and the narrow groove, and the wide protrusion and the narrow protrusion are limited by the end of the lock body away from the self-locking hole. The pull rod 707 and the lock tongue 705 cannot return to their original positions under the restoring force of the spring and remain in the unlocked state. When the lock tongue 705 needs to be returned to the locked position, the pull rod is rotated 90 degrees in the opposite direction so that the wide protrusion corresponds to the wide groove and the narrow protrusion corresponds to the narrow groove. The wide protrusion can move axially along the wide groove and the narrow protrusion can move axially along the narrow groove. At this time, under the restoring force of the spring, the pull rod 707 and the lock tongue 705 move axially toward one end close to the self-locking hole to achieve return. The lock body 706 is a hollow structure, and the two side walls of the lock body 706 away from the end of the strip groove are respectively provided with a concave wide groove and a narrow groove, and the two side walls of the pull rod 707 are respectively provided with a wide convexity and a narrow convexity, the wide convexity is adapted to the wide groove, and the narrow convexity is adapted to the narrow groove. At this time, the pull rod 707 can be inserted into the lock body along the wide groove and the narrow groove, and the inclined structure of the lock tongue 705 is located on the side close to the male buckle. The folding tube and the male buckle are rotated so that the lock tongue 705 passes through the self-locking hole 704 and the lock hole 703 of the male buckle to achieve locking. Since the two side walls of the outer end of the lock body 706 are designed with a wide groove and a narrow groove, the pull rod 707 and the lock tongue 705 can be limited in the circumferential direction to prevent them from being folded due to excessive folding of the folding tube. When the stacked tube is in the unfolded state, the locking hole 703 of the male buckle 701 is coaxial with the self-locking hole 704 of the female buckle 702. During the process, the side wall of the locking hole 703 of the male buckle 701 squeezes the side of the locking tongue 705, so that the locking tongue 705 retracts. When the locking hole 703 of the male buckle 701 is coaxial with the self-locking hole 704 of the female buckle 702, the locking tongue 705 pops up again under the elastic force of the spring, and is sequentially inserted into the self-locking hole 704 and the locking hole 703 to achieve self-locking. When it is necessary to fold, the pull rod 707 is manually pulled to retract the locking tongue 705 and release the self-locking state. At this time, the folding tube 1 can be rotated in the opposite direction to make the folding tube 1 present a folded state. ;

[0033] Furthermore, in order to enable the foot pedal 2 to withstand the pedaling force during operation, the foot pedal portion of this embodiment includes a foot pedal seat fixed on the side wall of the folding rod, the foot pedal 2 is hinged on the foot pedal seat, a limiting surface 5 is provided at the bottom of the foot pedal 2 near the hinge point, and a limiting block 6 is provided at the foot pedal seat near the hinge point. When the foot pedal 2 rotates from top to bottom to be perpendicular to the folding rod, the limiting surface 5 is fixedly abutted against the limiting block 6. After unfolding, the foot pedal 2 is limited by physical limiting, and no extra parts are required. The positioning of the force direction is achieved through the limiting design. The advantages of this positioning method are that no extra quick latches are required, the operation is simple, and the efficiency is high. Taking the attached figure as an example, this embodiment uses one end with a hook 4 as the upper end, which is closer to the aircraft when used, and the other end as the lower end, which is closer to the ground when used; by limiting the foot pedal 2 along the force direction when stepping on, the folding rotation direction of the foot pedal 2 is determined, so that the operator can automatically limit the position during the unfolding and folding process, reducing the manual limiting steps.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A portable emergency boarding ladder, characterized in that: include: A ladder body portion, which can be deployed and retracted in the cockpit, and can be hung at the hatch of the aircraft in the deployed state, and can be stored in the aircraft in the retracted state; The footrest is arranged on the side wall of the ladder body, and the footrest can be rotated to be parallel to the axis of the ladder body, or rotated in the opposite direction to be perpendicular to the axis of the ladder body.

2. The portable emergency boarding ladder according to claim 1, characterized in that: The ladder body comprises a plurality of folding tubes hinged in sequence, the end of the folding tube at the uppermost end is provided with a hook, and the hook can be hung at the hatch opening; the footrest is provided on the side wall of the folding tube.

3. The portable emergency boarding ladder according to claim 1, characterized in that: A support pad is provided on one side of the ladder body, and a fitting surface is provided on the side of the support pad away from the ladder body. The surface of the fitting surface is coated with an anti-slip layer, and the fitting surface can fit with the outer surface of the aircraft.

4. The portable emergency boarding ladder according to claim 2, characterized in that: Two adjacent folding tubes are rotatably connected via a pin shaft, and a self-locking mechanism is provided at the connection position. When the folding tubes are in an unfolded state, the self-locking mechanism can lock the two adjacent folding tubes.

5. The portable emergency boarding ladder according to claim 4, characterized in that: A male buckle is provided at one end of the folding tube, and a female buckle is provided at the other end. The first side of the male buckle of the folding tube is nested in the first side of the female buckle of the adjacent folding tube and are rotatably connected through a pin shaft. The second side of the female buckle of the folding tube is provided with the self-locking mechanism. When the folding tube is in an unfolded state, the second side of the male buckle of the folding tube can be nested in the second side of the female buckle of the adjacent folding tube and be locked by the self-locking mechanism.

6. The portable emergency boarding ladder according to claim 5, characterized in that: The male buckle includes a strip protrusion fixedly arranged at the end of the folding tube, and the two ends of the strip protrusion are respectively the first side and the second side of the male buckle, the first side of the male buckle is provided with a hinge hole, and the second side is provided with a locking hole; the female buckle includes an extension seat fixed to the end of the folding tube away from the male buckle, the extension seat is provided with a strip groove that can be adapted to the strip protrusion of an adjacent folding tube, and the two ends of the extension seat are respectively the first side and the second side of the female buckle, the first side of the female buckle is provided with two coaxial through holes, and the second side is provided with two coaxial self-locking holes, the strip protrusion is nested in the strip groove of the adjacent folding tube, and the first side of the male buckle is hinged to the first side of the female buckle through a pin shaft; when the folding tube is in an unfolded state, the locking hole of the male buckle is coaxial with the self-locking hole of the female buckle, and is locked by the self-locking mechanism.

7. The portable emergency boarding ladder according to claim 6, characterized in that: The self-locking mechanism includes a lock body, which is fixed to the outside of one of the self-locking holes in the strip groove, and a lock tongue is movably inserted in the lock body, and the end of the lock tongue away from the lock body is inserted in the corresponding self-locking hole, and the end of the lock tongue away from the lock body is an inclined structure; a pull rod is provided at the end of the lock body away from the strip groove, and the pull rod is fixedly connected to the end of the lock tongue located in the lock body; a spring is provided in the lock body, one end of the spring is fixedly abutted against the end of the lock tongue close to the pull rod, and the other end is fixedly abutted against the inner wall of the end of the lock body away from the self-locking hole, and the spring is sleeved on the outside of the pull rod close to the lock tongue.

8. The portable emergency boarding ladder according to claim 2, characterized in that: The footrest portion includes a footrest seat fixed on the side wall of the folding rod, a foot pedal is hinged on the footrest seat, a limiting surface is provided at the bottom of the foot pedal near the hinge point, and a limiting block is provided at the footrest seat near the hinge point. When the foot pedal rotates from top to bottom to be perpendicular to the folding rod, the limiting surface is fixedly abutted against the limiting block.

9. The portable emergency boarding ladder according to claim 2, characterized in that: The end of the folding tube at the uppermost end is hinged with two hanging racks arranged in parallel, and each hanging rack is provided with a hook at the top.

10. The portable emergency boarding ladder according to claim 3, characterized in that: The fitting surface of the support pad is covered with a rubber layer, and a smooth inner groove is provided at the center of the fitting surface.

Images