CN220705602U

CN220705602U - Working ladder for aircraft cargo door

Info

Publication number: CN220705602U
Application number: CN202322182574.2U
Authority: CN
Inventors: 刘全苓; 王力; 王泽辉; 毕金倾
Original assignee: Shanghai Zhimei Aviation Equipment Co ltd
Current assignee: Shanghai Zhimei Aviation Equipment Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-04-02
Anticipated expiration: 2033-08-14

Abstract

A work ladder for an aircraft cargo door, comprising: support frame, backup pad, ladder, connecting piece, palm support, directional wheel and universal wheel, the support frame top is equipped with the backup pad, and the support frame bottom is equipped with directional wheel, and the top and the backup pad front end of ladder are connected, and the bottom of ladder is connected with the support frame front end through the connecting piece, and the palm support is connected with the connecting piece, and the both sides of ladder are located to palm support symmetry, and the bottom of ladder is located to the universal wheel. Compared with the prior art, the caster is added, so that the caster is convenient to move; meanwhile, aiming at the safety requirements of casters and a working ladder, a foldable hand plate support is added, and stability of the working ladder in a working state is improved.

Description

Working ladder for aircraft cargo door

Technical Field

The utility model relates to a working ladder, in particular to a working ladder for a cargo door of an aircraft.

Background

The existing aircraft cargo holds are provided with special working ladders, which can meet the actual requirements of airports and are convenient to discharge from the cargo holds. However, the prior working ladder needs to be manually moved to the front of each cargo hold when in use, and a lot of manpower is wasted; on the other hand, the front end of the traditional working ladder uses a ground stop block, so that falling and losing are easy to occur, the table top is not large enough, and certain potential safety hazards exist. The reason for the insufficient size of the table is because of the difficulty in transportation, and the inability to mount the pulleys is the inability to provide a secure grip when secured.

To solve the above problems, we have made a series of improvements.

Disclosure of Invention

The object of the present utility model is to provide a working ladder for a cargo door of an aircraft which overcomes the above-mentioned drawbacks and disadvantages of the prior art.

A work ladder for an aircraft cargo door, comprising: the support frame is arranged at the top of the support frame, the directional wheels are arranged at the bottom of the support frame, the top end of the ladder is connected with the front end of the support plate, the bottom end of the ladder is connected with the front end of the support frame through the connecting piece, the palm support is connected with the connecting piece, the palm support is symmetrically arranged on two sides of the ladder, and the universal wheels are arranged at the bottom of the ladder;

wherein, the palm support includes: the hand-held turnover handle is connected with one end of the joint device, the other end of the joint device is connected with the supporting foot, the supporting foot is connected with one end of the unlocking spring, the other end of the unlocking spring is connected with the joint device, one side of the safety device is connected with the connecting piece during working, and the other side of the safety device is connected with the joint device.

Further, anti-collision rubber is arranged around the supporting plate.

Further, a fixed support is arranged on the inner side of the bottom of the support frame.

Further, the joint device includes: the first joint, the second joint and the third joint are sequentially connected in an axial mode from top to bottom, and the first joint is connected with the safety insurance.

Further, the safety insurance includes: the connecting device comprises a connecting groove, a mounting plate, a shaft connecting hole and a fixing bolt, wherein the connecting groove is formed in the mounting plate, the connecting groove is fixedly connected with a connecting piece, the mounting plate is provided with the shaft connecting hole, the shaft connecting hole is connected with a connecting shaft of a first joint, and the fixing bolt is fixedly connected with the connecting shaft of the first joint in a plug-in mode.

Further, the unlocking spring comprises a sleeve and a spring, wherein the sleeve is fixed on the mounting plate, one end of the spring is connected with the sleeve, and the other end of the spring is connected with the supporting leg

Further, the orientation wheel includes: wheel, triangle support piece, rubber pad, fixed chain and handle, the wheel is fixed in the support frame bottom, locate the wheel bottom when triangle support piece is fixed, locate in the fixed bolster when triangle support piece removes, triangle support piece symmetry is located on the rubber pad, the support frame bottom is located to the handle, be connected with the handle when triangle support piece is placed, fixed chain one end is connected with the handle, the fixed chain other end is connected with the support frame.

The utility model has the beneficial effects that:

compared with the prior art, the caster is added, so that the caster is convenient to move; meanwhile, aiming at the safety requirements of casters and a working ladder, a foldable hand plate support is added, and stability of the working ladder in a working state is improved.

Description of the drawings:

fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of the safety device of the present utility model.

Reference numerals:

the support frame 100, the fixing bracket 110, the support plate 200, the crash rubber 210, the ladder 300, and the connection 400.

A palm rest 500, a hand-held flip grip 510, a articulation device 520, a first articulation 521, a second articulation 522, and a third articulation 523.

The safety device 530, the connection groove 531, the mounting plate 532, the shaft connection hole 533, and the fixing bolt 534.

Support leg 540, unlocking spring 550, sleeve 551, and spring 552.

Directional wheel 600, wheel 610, delta support 620, rubber pad 630, fixed chain 640, handle 650, and universal wheel 700.

Detailed Description

The utility model will now be further described with reference to specific examples. It should be understood that the following examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model.

Example 1

Fig. 1 is a schematic structural view of the present utility model. Fig. 2 is a schematic structural view of the safety device of the present utility model.

As shown in fig. 1-2, a working ladder for a cargo door of an aircraft, comprising: the support frame 100, the support plate 200, the ladder 300, the connecting piece 400, the palm support 500, the orientation wheels 600 and the universal wheels 700 are arranged at the top of the support frame 100, the orientation wheels 600 are arranged at the bottom of the support frame 100, the top end of the ladder 300 is connected with the front end of the support plate 200, the bottom end of the ladder 300 is connected with the front end of the support frame 100 through the connecting piece 400, the palm support 500 is connected with the connecting piece 400, the palm support 500 is symmetrically arranged at two sides of the ladder 300, and the universal wheels 700 are arranged at the bottom of the ladder 300;

wherein, the palm rest 500 includes: the hand-held turnover handle 510, the joint device 520, the safety insurance 530, the supporting leg 540 and the unlocking spring 550, wherein the hand-held turnover handle 510 is connected with one end of the joint device 520, the other end of the joint device 520 is connected with the supporting leg 540, the supporting leg 540 is connected with one end of the unlocking spring 550, the other end of the unlocking spring 550 is connected with the joint device 520, one side of the safety insurance 530 is connected with the connecting piece 400 during operation, and the other side of the safety insurance 530 is connected with the joint device 520.

An anti-collision rubber 210 is provided around the support plate 200.

The bottom inside of the supporting frame 100 is provided with a fixing bracket 110.

The articulation device 520 includes: the first joint 521, the second joint 522, and the third joint 523 are pivotally connected in this order from top to bottom, and the first joint 521 is connected to the safety device 530.

The safety insurance 530 includes: the connecting groove 531 is formed in the mounting plate 532, the connecting groove 531 is fixedly connected with the connecting piece 400, the mounting plate 532 is provided with the shaft connecting hole 533, the shaft connecting hole 533 is connected with the connecting shaft of the first joint 521, and the fixing bolt 534 is fixedly connected with the connecting shaft of the first joint 521 in a plug-in manner.

The unlocking spring 550 includes: sleeve 551 and spring 552, sleeve 551 being fixed to mounting plate 532, one end of spring 552 being connected to sleeve 551, the other end of spring 552 being connected to support leg 540

The orientation wheel 600 includes: the wheel 610, the triangular support 620, the rubber pad 630, the fixed chain 640 and the handle 650, the wheel 610 is fixed at the bottom of the support frame 100, the triangular support 620 is fixed and arranged at the bottom of the wheel 610, the triangular support 620 is arranged in the fixed support 110 when moving, the triangular support 620 is symmetrically arranged on the rubber pad 630, the handle 650 is arranged at the bottom of the support frame 100, the triangular support 620 is connected with the handle 650 when being placed, one end of the fixed chain 640 is connected with the handle 650, and the other end of the fixed chain 640 is connected with the support frame 100.

The utility model adopts the structure of the directional wheel 600 and the universal wheel 700, and can be conveniently moved to the front of each cargo hold during use. On the other hand, the support plate 200 of the work ladder of the present utility model can be increased in area by 2 times as compared to the conventional one. Because of the universal wheel 700, even if the table top becomes large, its transportation is not difficult. The utility model aims to avoid potential safety hazards such as sliding when the wheels are fixed on the working ladder, and the problem to be solved is the most needed.

First, the present utility model contemplates a palm rest 500 that serves to assist in supporting the wheel when it is desired to be secured in place, preventing the wheel from slipping. The principle is as follows: the support feet 540 may provide friction from points as a fulcrum to prevent wheel slippage when the three joints of the joint arrangement 520 are vertical. The principle itself is very simple but there is a problem to achieve, namely how it can be taken up when moving, so this problem becomes the turning of taking up the wheels into taking up the palm rest 500. The method for folding the palm rest 500 is that the first joint 521 of the joint device 520 is driven by holding the turning handle 510, and then the first joint 521 bends the second joint 522 again to form a bending angle. The third joint 523 is not bent, but the distance between the first joint 521 and the second joint 522 is shortened, so that the third joint 523 is driven to be pulled up into the sleeve 551, and the supporting leg 540 is driven to leave the ground. And the spring is compressed in the process. Then, the fixing pins 534 of the safety device 530 are inserted into the connecting grooves 531 of the mounting plate 532 and the connecting portions of the first joint 521 and the second joint 522, respectively, and are fixed. The principle is that the movable joint device is locked by utilizing the characteristics of the bolt structure. When needed to fix, the securing latch 534 is released and the spring 552 is reset and the support foot 540 is again in contact with the ground.

On the other hand, the friction force of the directional wheel 600 is increased, the directional wheel is fixed through the triangular support 620, a large rubber pad 630 is arranged below the triangular support 620, the wheel 610 is fixed more stably, and when the directional wheel needs to be moved, the triangular support 620 is lifted through the fixing chain 640 to be placed into the handle 650 for fixing, so that the wheel 610 can be released.

The present utility model has been described in detail with reference to the embodiments, but the present utility model is not limited thereto, and various modifications may be made without departing from the spirit of the present utility model.

Claims

1. A working ladder for a cargo door of an aircraft, comprising: support frame (100), backup pad (200), ladder (300), connecting piece (400), palm support (500), directional wheel (600) and universal wheel (700), support frame (100) top is equipped with backup pad (200), support frame (100) bottom is equipped with directional wheel (600), the top and the backup pad (200) front end of ladder (300) are connected, the bottom of ladder (300) is connected with support frame (100) front end through connecting piece (400), palm support (500) are connected with connecting piece (400), both sides of ladder (300) are located to palm support (500) symmetry, the bottom of ladder (300) is located to universal wheel (700).

Wherein the palm rest (500) comprises: hand-held overturning handle (510), joint device (520), safety insurance (530), supporting legs (540) and unlocking spring (550), hand-held overturning handle (510) is connected with one end of joint device (520), the other end of joint device (520) is connected with supporting legs (540), supporting legs (540) are connected with one end of unlocking spring (550), the other end of unlocking spring (550) is connected with joint device (520), one side of safety insurance (530) during operation is connected with connecting piece (400), the opposite side of safety insurance (530) is connected with joint device (520).

2. A working ladder for an aircraft cargo door according to claim 1, characterized in that: anti-collision rubber (210) is arranged around the supporting plate (200).

3. A working ladder for an aircraft cargo door according to claim 1, characterized in that: the inner side of the bottom of the supporting frame (100) is provided with a fixed bracket (110).

4. A working ladder for an aircraft cargo door according to claim 1, characterized in that: the joint device (520) includes: a first joint (521), a second joint (522) and a third joint (523) which are sequentially connected from top to bottom, wherein the first joint (521) is connected with a safety guard (530).

5. A working ladder for an aircraft cargo door according to claim 4, characterized in that: the safety insurance (530) includes: the connecting groove (531) is formed in the mounting plate (532), the connecting groove (531) is fixedly connected with the connecting piece (400), the mounting plate (532) is provided with the shaft connecting hole (533), the shaft connecting hole (533) is connected with a connecting shaft of the first joint (521), and the fixing bolt (534) is fixedly connected with the connecting shaft of the first joint (521) in a plug-in mode.

6. A working ladder for an aircraft cargo door according to claim 5, characterized in that: the unlocking spring (550) includes: the spring comprises a sleeve (551) and a spring (552), wherein the sleeve (551) is fixed on a mounting plate (532), one end of the spring (552) is connected with the sleeve (551), and the other end of the spring (552) is connected with a supporting foot (540).

7. A working ladder for an aircraft cargo door according to claim 3, characterized in that: the orientation wheel (600) comprises: wheel (610), triangle support piece (620), rubber pad (630), fixed chain (640) and handle (650), wheel (610) are fixed in support frame (100) bottom, locate wheel (610) bottom when triangle support piece (620) are fixed, locate in fixed bolster (110) when triangle support piece (620) remove, triangle support piece (620) symmetry is located on rubber pad (630), support frame (100) bottom is located to handle (650), triangle support piece (620) are connected with handle (650) when placing, fixed chain (640) one end is connected with handle (650), fixed chain (640) other end is connected with support frame (100).