CN103615188A - Multi-purpose working ladder - Google Patents

Abstract

The invention belongs to the working ladder technology, and relates to a multipurpose working ladder capable of realizing the conversion between a herringbone ladder and a straight ladder. The multipurpose working ladder includes a front ladder frame (1), a supporting ladder frame (2) and a working platform (3) arranged between them, wherein the front ladder frame (1) and the supporting ladder frame (2) pass through The folding of the working platform (3) realizes the conversion of the ladder ladder and the ladder ladder. The bottom of the working platform rests on the upper surface of the stopper (4) when using a ladder, and there are positioning pins (5) on the side of the working platform (3). In the arc chute, the arc direction is consistent with the turning track of the working platform. The multipurpose working ladder of the present invention has the advantages of simple structure, convenient operation and strong applicability. By folding and stretching, it can meet the needs of maintenance work in various occasions and effectively reduce the types and quantities of random working ladders.

Description

A kind of multi-purpose working ladder

technical field

The invention belongs to the working ladder technology, and relates to a multipurpose working ladder capable of realizing the conversion between a herringbone ladder and a straight ladder.

Background technique

First of all, the aircraft needs to be equipped with a variety of ladders for maintenance and use. For example, the working ladder in the cargo compartment of a large aircraft needs a ladder, the working ladder for the maintenance of the top of the cargo compartment of a large aircraft, the working ladder for the vertical tail passage, and a ladder for external maintenance of the aircraft. These working ladders are often used when they need to be maintained at other airports, and they need to be carried with them, occupying the space of the aircraft, increasing the weight of the equipment for the aircraft, and bringing inconvenience to the transfer and management of the aircraft.

Contents of the invention

The technical problem to be solved by the present invention is to provide a multi-purpose working ladder with simple results, convenient operation and strong applicability, which can meet the needs of maintenance work in various occasions.

The technical solution of the present invention is: a multi-purpose working ladder, which includes a front ladder frame 1, a supporting ladder frame 2 and a working platform 3 arranged between them, wherein the front ladder frame 1 and the supporting ladder frame 2 are rotated , fixing and turning over and leaning on the working platform 3 to realize the conversion of the ladder and the ladder.

The bottom of the working platform rests on the upper surface of the stopper 4 during a herringbone ladder, and there are positioning pins 5 on the side of the working platform 3. The positioning pins are stuck in the arc-shaped slots of the frame stopper 4 on the supporting ladder, and the arc direction is in line with the working platform. The flip trajectory is consistent.

There is a handrail 6 that can be pulled out and received in the pillar on one side of the front ladder frame, and the handrail is pulled out and fixed by the guide sleeve 7.

Retractable struts 8 are arranged in the support ladder frame pillar, and some connection holes are arranged on the struts, stretch out different lengths and connect and fix in the guide post 12 with pins (9) as required.

Beneficial effects of the present invention: when the multi-purpose working ladder of the present invention is a herringbone ladder, the positioning pins fixed on the side of the working platform are stuck in the slots of the supporting ladder frame stoppers, and the bottom of the working platform rests on the upper part of the stoppers, realizing double Safety, so the ladder does not need to be provided with a safety pull bar in order to prevent the separation of the front ladder frame and the supporting ladder frame. In addition, the hidden telescopic handrails are used, which can be pulled out and fixed according to the needs. The whole ladder has a simple appearance without exposed parts, and the length of the ladder can be adjusted by folding and retractable struts to meet the needs of different maintenance occasions of the aircraft, and has great practical application value. .

Description of drawings

Fig. 1 is a schematic diagram of the state of the ladder ladder of the multi-purpose working ladder of the present invention, and the supporting ladder frame is the shortest state;

Fig. 2 is a partially enlarged view of the fixed part of the handle in Fig. 1;

Fig. 3 is the structural representation of block;

Fig. 4 is a schematic diagram of the state of the multi-purpose working ladder of the present invention;

Among them, 1-front ladder frame 2-support ladder frame 3-working platform 4-block 5-locating pin 6-handrail 7-guide sleeve 8-extensible support rod 9-pin 10-movable support block 11-pedal 12 - Guide posts.

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1, the technical scheme of the present invention is: a kind of working ladder, a kind of multi-purpose aircraft cargo hold working ladder, mainly is made of aluminum alloy material, comprises front ladder frame 1, supporting ladder frame 2, working platform 3; There are two There are two kinds of use states, herringbone ladder and one-word ladder, which can be folded and placed after use.

A pedal is arranged between the front ladder frame pillars, and a retractable handrail 6 is arranged in one side pillar, and bayonet pins are arranged at the end of the handrail to rotate and fix in the ring groove on the guide sleeve 7. The armrest can be stored in the pillar when not in use, and can be pulled out and rotated 90° when in use. Ordinary ladders do not have handrails, and when the working platform is higher than the ground, there is a danger of people falling without the protection of handrails. The handrail is hidden in the pillar and pulled out when needed to ensure the safety of personnel;

There are pedals on the upper part between the 2 pillars of the supporting ladder frame, and the telescopic struts 8 on the lower part. The pedals on the upper half can make the ladder reach a higher working height in the state of a ladder, and the telescopic struts can realize the slope of the ground at different angles. use. Every telescopic strut is connected and fixed with the guide post 12 in the pillar by two pins (9). The random fixation of the telescopic strut solves the problem of needing to ride on the plane to reach different heights when used on the ground.

Movable support block (10) is equipped with at the bottom of telescopic strut, and rubber pad is arranged at the bottom. The inside of the movable support block is a ball head structure, which realizes 360° rotation, and can support the movable support block on any slope ground and uneven wall to keep the working platform level.

When using a herringbone ladder, the positioning pin 5 on the side of the working platform 3 is stuck in the arc-shaped slot supporting the ladder frame stopper 4, and the bottom of the working platform rests on the upper part of the stopper 4, which realizes double insurance and eliminates the need to prevent the front ladder The frame and the supporting ladder frame are easy to separate and insurance mechanisms such as connecting rods are set here, so that there are no redundant parts outside the ladder.

The invention is simple in structure and easy to operate: put the handrails in the pillars, pull them out and fix them as needed, and solve the problem of potential safety hazards caused by the lack of handrails and people stepping on the working platform in general herringbone and double-purpose ladders; Maintenance required on top of rear cargo axle. The fixing of the miter ladder depends on the positioning pin on the side of the working platform being stuck in the round socket of the block supporting the ladder frame, and the bottom of the working platform rests on the upper part of the block.

The working ladder is multi-purpose and can be carried at random. In the case of few field facilities, it solves the problem of different ladder-type equipment for maintenance needs inside and outside the cargo compartment after the temporary landing of a large transport aircraft. It realizes multiple functions of one elevator and realizes the requirement of comprehensive support equipment.

The height of the working platform from the ground can reach 3 meters, and the height of the ladder can reach 5 meters, meeting the height requirements of the cargo compartment. The handrails ensure the stability of the personnel standing; the rubber pad at the bottom of the ladder increases the stability of the ladder. When used as a ladder, the connection is simple and firm, and the rubber pad at the backing plate will not damage the external structure of the resting part. The working ladder solves the problem that there is no suitable working ladder for the aircraft to perform temporary tasks and land at other airports. It is used for maintenance of electrical systems, air conditioning systems and other pipelines and equipment in the aircraft cargo compartment, especially at the rear cargo bridge with a slope. It provides great convenience when approaching the vertical tail maintenance channel and performing maintenance on the engine or the middle and high parts of the fuselage.

Claims (6)

1. a multipurpose working stand, it is characterized by: comprise front ladder (1), support ladder (2) and be arranged on the working platform (3) between the two, wherein, front ladder (1) and support ladder (2) are by the folding conversion that realizes double ladder and yi shaped ladder of upset and working platform (3).

2. multipurpose working stand according to claim 1, it is characterized in that: during double ladder, working platform bottom rides against block (4) upper surface, there is alignment pin (5) working platform (3) side, during double ladder, alignment pin is stuck in the arc-shaped slot of the frame block (1) on supporting ladder, and arcuate directions is consistent with working platform overturning track.

3. multipurpose working stand according to claim 2, is characterized in that: in the pillar of described front ladder one side, have the handrail (6) that can pull out, take in, handrail is fixing by guide pin bushing (7) after pulling out.

4. multipurpose working stand according to claim 3, is characterized in that: in supporting ladder post setting, have telescopic pole (8), have some connecting holes on strut, stretch out as required pin for different length (9) and be connected and fixed by guide pillar (12).

5. multipurpose working stand according to claim 4, is characterized in that: the movable piece (10) of bulb type is equipped with in telescopic pole (8) bottom.

6. multipurpose working stand according to claim 5, is characterized in that: movable piece (10) bottom surface of bulb type is provided with rubber pad.

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