RU2117607C1 - Barrier for aircraft cargo compartments - Google Patents

Abstract

FIELD: aeronautical engineering. SUBSTANCE: load-bearing flexible rod of barrier keeps net with edge former; it has reserve length to form pocket-like member which has section which is broken at displacement of cargo, thus equalizing length of load-bearing rods and smoothly distributing effort. Net is additionally kept with suspended rods. EFFECT: enhanced reliability. 9 dwg

Description

 The invention relates to the equipment of aircraft, and in particular to devices for securing cargo, pallets and containers in an airplane, and serves to eliminate the dangerous movement of goods, mainly in the longitudinal direction in any flight and landing conditions, including emergency.

 At present, a mooring net for an aircraft cargo pallet is known (see ed. Certificate 1003486 class B 64 D 9/00), top and side diagonal ribbons and sidewall connection elements made in the form of bonded ends of the respective ribbons.

 However, such nets do not work when securing long loads or packages, especially when loading forward.

 A safety net for the cargo compartments of the aircraft is also known (see US patent CL 244-118P, B 64 D 9/00 N 3897919, claimed 13.02.74, published 05.08.75.), Which consists of a main part mounted vertically and serving as a direct barrier to the load, and the upper part, which is horizontally above the load and designed to prevent the load from being thrown over the main part of the safety net. The main part of the safety net is attached from below to the fastening nodes in the cargo floor of the aircraft, and at the top to two longitudinal guides on the ceiling with the help of nodes located at the upper nodes of the main part of the safety net and providing an easy change of the position of the safety net along the cargo compartment.

 To fasten the side flaps of the main and upper part of the safety net to the floor, slings with quick-disconnect connecting nodes are also attached to the existing fittings in the cargo floor.

 In addition, a barrier device is known - a mesh partition of the cargo compartment (see US patent N 3486723 class 244 - 188), installed across the cargo compartment of the aircraft to prevent the longitudinal displacement of the disconnected cargo at high overload (up to 9), contains tapes fastened together and with a fringing element with the formation of a mesh web, while the fringing element is connected to flexible power rods attached to power nodes located on the ceiling, sides and floor of the fuselage.

 Radial and concentric tapes are stretched in one plane in the form of a web. The inner ends of the radial tapes are attached to the central rigid ring, and the outer ends are to fittings on the wall and on the fuselage floor. The outer end is a power flexible element made integrally to the central part of the grid. For passage of crew members through a stretched mesh partition, the latter is radially stretched in its upper half, which ensures the presence of connectors in the central ring and in concentric mesh tapes.

 The central ring consists of two tubular segments filled with solid urethane foam with a rigid axial fiberglass force element. The ring segments at the ends have detachable forked bolted connections, and the concentric mesh tapes are disconnected with buckles.

 However, the known devices do not provide sufficiently uniform tension of the tapes and loading of the fittings, which can lead to an increase in weight and a decrease in reliability.

 The objective of the invention is the creation of the design of the barrier device, providing uniform tension of the tapes and improving the operational properties of the device.

 The technical effect is to increase the reliability of the structure and increase the safety of an emergency landing. This is achieved by the fact that in a barrier device containing tapes fastened together and with a fringing element to form a web-cloth, the fringing element is connected to flexible power rods attached to power units placed on the ceiling, sides and floor of the fuselage, according to the invention, power rods made with a reserve length with the formation of at least one pocket-shaped element having a bougie section at the entrance, in addition, the device is equipped with suspended flexible rods connected at one end with an eye tovochnym web element, the other - with a ceiling mounted suspension units, wherein the suspension of suspended flexible rods and the plane offset power assemblies nodes plane relative to each other, and the latter is displaced against the flight.

The invention is illustrated by drawings, where:
- in FIG. 1 shows a longitudinal section of a cargo compartment with a barrier device in the absence of exposure to cargo;
- in FIG. 2 shows a longitudinal section of a cargo compartment with a barrier device with elongated pocket-shaped elements (when exposed to cargo during an emergency landing);
- in FIG. Figure 3 shows a barrier device in the anti-flight position (in the absence of cargo impact. Shown with combined half-projections, the left of which shows a grid with flexible power rods and their attachment points on the beams of the fuselage frame, flexible suspended rods are not conditionally shown); the right half-projection shows a mesh web with hanging rods,
- in FIG. 4 is a longitudinal section of FIG. 1;
- in FIG. 5 is a cross-sectional view of bolt assembly IV in FIG. 3;
- in FIG. 6 is a cross-sectional view against flight of the pin assembly of FIG. 3;
- in FIG. 7 shows the assembly II in FIG. 1 attachment of flexible tie rods to the fuselage floor beams;
- in FIG. 8 is a sectional view of assembly III in FIG. 1 with flexible wall suspension to the ceiling beams;
- in FIG. 9 shows horizontal and vertical ribbons, when exposed to cargo, the dashed line shows the deformation of the vertical ribbon without taking into account the work of pocket-shaped elements.

 The barrier device for the cargo compartments (see Figs. 1 - 9) is installed in the cargo compartment on the upper deck 1 in front of the fuselage 2 in front of the placed loads 3, contains vertical 4 and horizontal 5 tapes fastened together by firmware and located perpendicular to each other.

 Around the entire perimeter of the tape are connected by a fringing element 6, forming in the plane of the cross section a grid - web - 7.

 Flexible power, which, unlike the prototype, is not a direct continuation of the web tapes, rods 8 have a reserve length of 2 Δl forming a pocket-shaped element 9 (Fig. 1) and are fixed at one end to the power nodes (10 and 11 on the ceiling and sides, as well as on the floor, respectively, and the other end - to the bordering element 6. Flexible power rods 8 on board the fuselage 2 are made with the possibility of quick disconnection by means of a stud 12 (Fig. 3, 6) from the power nodes 10 in the lower side of the fuselage 2 for passage of crew members to cargo 3 (Fig. 3). Length of forces of flexible rods is determined depending on their location along the perimeter of the web and on the transverse dimension b (Fig. 9) and vertical h (size b is larger than size h) (Fig. 9), and accordingly the Δ l value of the pocket-shaped element 9.

 Flexible power rods 8 are attached to the ceiling units 10 and floor units 11 by means of a bolt lock 13. Power flexible rods 8 at the junction with the bolt lock 13 and the pin 12 have bougie sections 14. The blade 7 is suspended by means of flexible hanging rods 15 fastened with adjusting buckles 16 to the suspension assembly 17 located on the ceiling of the fuselage 2.

 Suspended flexible rods 15 are connected at one end to the edging element 6, and at the other end are connected to the suspension assemblies 17. The edging element 6 of the web 7 is connected to the flexible suspension rods 15 fastened to the adjusting buckles 16, which in turn are connected to the suspension assemblies 17 located on the ceiling. In this case, the plane of the power nodes 10, 11 of the suspension rods 8 and the plane of the nodes of the suspension 17 are offset from each other, the latter being shifted along the flight (towards cargo 3).

 After that, the bougieuilted sections 14 of the flexible power rods 8 are destroyed, and pocket-shaped elements 9 are moved along the bolt lock 13 and the pin 12 to the stop.

 The difference in size of the pocket-shaped elements ensures uniform loading of the flexible power rods 8, as well as vertical and horizontal ribbons of the mesh web 7.

 For flexible power elements suitable for horizontal ribbons located in the middle of the mesh web, the length of the pocket-shaped elements can be 0.

 In case of emergency landing, pallets (containers) with cargo 3 after exceeding certain standardized overloads break from the locks and move around the cabin, resting against the barrier device. The front pallets abut against the web-cloth 7, the subsequent ones - against each other, while the web-cloth begins to stretch in the form of cargo 3, flexible suspension rods 15 come into operation, they break away from the nodes of their suspension 17, destroying them. Simultaneously with the suspension rods, flexible power rods 8 begin to work, which are loaded from the fringing element 6 of the web of the web 7 and transmit the force to the power units 10, 11. At the same time, the bougie sections 14 of the pocket-shaped elements 9 of the flexible power rods 8 are destroyed, the pocket-shaped elements 9 dissolve increasing length rods, aligning the lengths of the longitudinal and transverse dimensions of the mesh tapes and leveling the forces on the rods 9.

Claims (1)

 A barrier device for the cargo compartments of the aircraft, comprising tapes fastened together and with a fringing element to form a web-cloth, a fringing element connected to flexible power rods attached to power units located on the ceiling, sides and floor of the fuselage, characterized in that power rods are made with a reserve length with the formation of at least one pocket-shaped element having a bougie portion at the entrance, in addition, the device is equipped with suspended flexible rods connected by one end ohm with a finishing element webs, grids, other - mounted with ceiling suspension units, wherein the suspension assemblies flexible suspension rods and power units are offset relative to each other.

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