WO2006032754A1 - Device for protecting a closing panel of a manhole embodied in the partition wall of an aircraft wheel train - Google Patents

Device for protecting a closing panel of a manhole embodied in the partition wall of an aircraft wheel train Download PDF

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Publication number
WO2006032754A1
WO2006032754A1 PCT/FR2005/002265 FR2005002265W WO2006032754A1 WO 2006032754 A1 WO2006032754 A1 WO 2006032754A1 FR 2005002265 W FR2005002265 W FR 2005002265W WO 2006032754 A1 WO2006032754 A1 WO 2006032754A1
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WO
WIPO (PCT)
Prior art keywords
panel
arms
partition
face
shutter panel
Prior art date
Application number
PCT/FR2005/002265
Other languages
French (fr)
Inventor
Olivier Legathe
Original Assignee
Airbus France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airbus France filed Critical Airbus France
Publication of WO2006032754A1 publication Critical patent/WO2006032754A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
    • B64C1/1407—Doors; surrounding frames
    • B64C1/1446—Inspection hatches

Definitions

  • the present invention relates to a device intended to protect, in an aircraft, the shutter panel of a manhole made in a bogie partition, in particular in that separating said bale box from the wing box.
  • many aircraft comprise a box of voi ⁇ lure, arranged inside the fuselage, at the crossing thereof and wings forming the wing and for fixing said wings.
  • a wing box is generally used to house equipment, such as air conditioning units, engines and control transmission boxes of the leading edge slats, ducts. hydraulic control, electrical cables and, optionally, a fuel reserve.
  • equipment such as air conditioning units, engines and control transmission boxes of the leading edge slats, ducts. hydraulic control, electrical cables and, optionally, a fuel reserve.
  • it is essential to provide at least one access opening, of the manhole type, inside said wing box, this opening being closable, generally from my ⁇ sealed, by a shutter panel.
  • a protective shield formed of a metal plate mounted on a peripheral stiffening frame, the shield covering all of said shutter panel of the opening.
  • the object of the present invention is to overcome the aforementioned drawbacks, by providing a protection device, which is lightweight while providing effective protection against the risk of projecting tire flaps.
  • the device for the protection in an aircraft, of the shutter panel of a manhole made in a partition of a train compartment, is remarkable in that it comprises a chord comprising arms,
  • said protective device when said protective device is put in place on the said shutter panel, its arms block access to the latter by stopping any tire flaps projected towards said shutter panel.
  • the present invention is based on observations and tests of the applicant showing that, in the event of bursting of the tires of the wheels of an aircraft train, the resulting flaps have di ⁇ mensions comparable to those of said hole d or at least a large part of the area of the latter, so that it is not necessary to protect the entire surface of the shutter panel, but contrary, that it suffices to protect a part of it. Indeed, given the relative dimensions of the shutter panel and tire flaps, at least a portion of the frame according to the present invention will be able to stop said flaps before they reach said panel .
  • said end zones of the arms project from the face of the frame intended to be directed towards said member. sign.
  • the number of arms of the frame according to the present invention depends on the size of the manhole. However, experience has shown that for a manhole of usual dimensions (for example of the order of 1/4 m 2 ), it was sufficient that the frame according to the invention is provided with four arms forming a cross of St. Andrew to be totally effective.
  • each arm may be constituted by an elongate blade, carrying at least one projecting stiffening rib on its face intended to be directed to the opposite said shutter panel.
  • each arm comprises two longitudinal projecting ribs adjacent to its longitudinal edges and at least one transverse projecting rib connecting said longitudinal protruding ribs. Said longitudinal and transverse protruding ribs can thus form stiffening boxes communicating with each arm a high rigidity, although mainly constituted by a blade.
  • the transverse ribs may further form a caisson déli ⁇ mitant said common central area.
  • said frame To further increase the stiffness of the frame, without increasing the weight, it is advantageous for said frame to have webs integral with said arms and at least partially closing off the sectors delimited by the pairs of adjacent arms. It will be noted that, in addition, such sails can serve as a stop for tire flaps projected towards said shutter panel.
  • said closure panel prefferably has a protruding peripheral edge capable of being applied, at the periphery of said manhole, on the face of said partition opposite to said landing block and of holes distributed at the periphery of said panel and for fixing the latter to said partition, for example by means of clamps for clamping the edge of said manhole between themselves and said peripheral edge protruding.
  • said arms have fixing holes, arranged longitudinally recessed from said end zones of the arms and adapted to corres ⁇ pondance with some of the fixing holes of said shutter panel.
  • said chord may be attached to said partition together with said shutter panel by using some of the fixing holes of said shutter panel, said partition being then clamped between said end plates of the arms and said protruding peripheral edge of said shutter pan ⁇ .
  • said protection device according to the invention is constituted by a monolithic piece of a light alloy, for example obte ⁇ bare by casting or molding.
  • Figure 1 is a perspective view of the underside of an aircraft, illustrating the relative arrangement of the wing box and the main landing gear box.
  • FIG. 2 is a front view, from the landing gear compartment, of the partition separating the wing box from the landing gear compartment and in which two manholes are arranged, each of them being equipped with a shutter panel and an exemplary embodiment of the pro ⁇ protection device according to the invention.
  • Figure 3 is a front view of a shutter panel in place in the corresponding manhole with a perspective view of said embodiment of the protection device according to the invention.
  • Figure 4 is a plan view of the face of said device of in ⁇ vention intended to be disposed opposite said closure panel.
  • Figure 5 is a front view of the exemplary embodiment of Figures 2, 3 and 4 mounted on the corresponding access panel.
  • Figure 6 is a sectional view along the line VI-VI of Figure 5.
  • the aircraft shown in FIG. 1 comprises a fuselage 1, two wings 2 symmetrical with respect to said fuselage, a wing box 3 disposed in the fuselage 1 and for fixing the two wings 2 and a main landing gear 4, located immediately to the rear of the wing box 3, for housing the wheels 5 of the main landing gear.
  • the wing box 3 has a structure comprising lateral spars, on which are attached the two wings 2, and transverse spars that connect the structure of a wing to that of the opposite wing.
  • the wing box 3 is separated from the main landing gear compartment 4 by the rear transverse beam forming a partition 6, as illustrated in FIG. 2, having opposed faces 6.3 and 6.4 respectively directed towards the wing box 3 and towards 4.
  • the manholes 7 are arranged in the partition 6 for convenient access, from the landing gear compartment 4, to the interior of the wing box 3 and to the materials contained therein. As shown on a larger scale in FIGS. 3 and 5, each manhole 7 has a rounded bay geometry, the dimensions of which are of the order of several decimetres or at most of the order of magnitude. Be.
  • a shutter panel 8 whose shape corresponds to that of the manhole 7 corresponding, can be embedded on the side of the wing box 3.
  • the shutter panel 8 is for example formed by a pla ⁇ metallic (aluminum) provided at its periphery with a network of ner ⁇ vures 9 for strengthening and handling.
  • the shutter panel 8 of the manhole 7, embedded therein by the face 6.3 of the partition directed towards the wing box 3, is provided with a device protec ⁇ tion, mounted on the face 6.4 of the partition 6 facing the box train 4.
  • this protective device consists of a part, for example a light alloy, a chord 10 in the form of a cross of Saint-André comprising four arms 12 radiating around a central zone 1 1 common to said arms 12.
  • This frame 10 comprises a face 10.8 intended to be directed towards the corresponding shutter panel 8 and a face 10.4 intended to be directed towards the landing block 4.
  • each arm 12 is provided, at its free end, with an end strip 13, projecting from the rest of said face 10, 8 for example it has one or more shoulders 15.
  • the common central area 1 1 of the frame is arranged facing the central portion
  • Each arm 12 is constituted by an elongate blade 14, bearing, on the side of the face 10.4, longitudinal stiffening ribs 1 6 and 17 and transverse stiffening ribs 18 and 19.
  • the longitudinal ribs 16 and 17 are close to the longitudinal edges arm 12 and transverse ribs 18 and 19 connect said longitudinal ribs 16 and 17 together to form stiffening boxes. It is advantageous for such transverse ribs 18 to form a box delimiting the common central zone 11.
  • the frame 10 comprises stiffening webs 20 soli ⁇ daires said arm and at least partially closing said sectors.
  • the shutter panel 8 comprises, in known manner, through-holes 21 distributed around its periphery and serving
  • said arms 12 also comprise fixing holes 22, arranged longitudinally recessed from the projecting end plates 13 and able to come into coincidence with some of the peripheral fastening holes. 21 of the shutter panel 8 (see Figure 3).
  • the shutter panel 8 further comprises, also in a known manner, a projecting peripheral rim 23 adapted to be applied against the face 6.3 of the partition 6, with wide-head clamping flanges 24 being pre ⁇ seen, in a known manner , to cooperate with the holes 21 of the panel 8 to bear on the face 6.4 of the partition 6 and to press the projecting edge 23 against said face 6.3, with possible interposition of a seal 25.
  • fastening means 26 are provided, able to cooperate with the pairs of holes 21 and 22 opposite to fix the frame 10 to the partition 6, together with said shutter panel 8. The partition 6 is then more pinch between the end areas 13 of the arms 12 and the projecting peripheral edge 23 of the closure panel 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

The inventive device is provided with a cross-shaped flange (10) comprising arms (12) which radially extend away from a common central area (11) and have the free ends applied against said partition wall (6).

Description

Dispositif pour la protection du panneau d'obturation d'un trou d'homme pratiqué dans une cloison de case de train d'aéronef.Device for protecting the shutter panel of a manhole made in an aircraft landing-block partition.
La présente invention concerne un dispositif destiné à protéger, dans un aéronef, le panneau d'obturation d'un trou d'homme pratiqué dans une cloison de case de train, notamment dans celle séparant ladite case de train du caisson de voilure. On sait que de nombreux aéronefs comportent un caisson de voi¬ lure, aménagé à l'intérieur du fuselage, à la croisée de celui-ci et des ailes formant la voilure et destiné à la fixation desdites ailes.The present invention relates to a device intended to protect, in an aircraft, the shutter panel of a manhole made in a bogie partition, in particular in that separating said bale box from the wing box. It is known that many aircraft comprise a box of voi¬ lure, arranged inside the fuselage, at the crossing thereof and wings forming the wing and for fixing said wings.
On sait de plus qu'un tel caisson de voilure est généralement uti¬ lisé pour y loger des matériels, tels que des groupes de conditionnement d'air, des moteurs et boîtiers de transmission de commande des becs de bord d'attaque, des conduits de commande hydraulique, des câbles élec¬ triques et, éventuellement, une réserve de carburant. Bien entendu, pour des raisons d'installation et de maintenance, il est indispensable de prévoir au moins une ouverture d'accès, du type trou d'homme, à l'intérieur dudit caisson de voilure, cette ouverture étant obturable, généralement de ma¬ nière étanche, par un panneau d'obturation.It is further known that such a wing box is generally used to house equipment, such as air conditioning units, engines and control transmission boxes of the leading edge slats, ducts. hydraulic control, electrical cables and, optionally, a fuel reserve. Of course, for reasons of installation and maintenance, it is essential to provide at least one access opening, of the manhole type, inside said wing box, this opening being closable, generally from my ¬ sealed, by a shutter panel.
Or, pour des raisons pratiques d'accès, il est avantageux que cette ouverture d'accès débouche dans la case de train principal de l'aéronef, case qui est située immédiatement à l'arrière dudit caisson de voilure et dans laquelle le train d'atterrissage principal est logé quand il est replié.However, for practical reasons of access, it is advantageous for this access opening to open into the main landing gear bay of the aircraft, a box which is located immediately behind the said wing box and in which the landing gear main landing is lodged when it is folded.
Il peut donc arriver, en cas d'éclatement de pneumatiques des roues dudit train, que des lambeaux de ces pneumatiques soient projetés en direction dudit panneau d'obturation.It can therefore happen, in the event of tire bursting of the wheels of said train, that flaps of these tires are projected towards said shutter panel.
Afin d'éviter que de tels lambeaux de pneumatiques défoncent Ie- dit panneau d'obturation et pénètrent dans le caisson en endommageant les matériels qu'il contient, il est déjà connu de protéger un tel panneau par un bouclier de protection, formé d'une plaque métallique montée sur un cadre de rigidification périphérique, Ie bouclier recouvrant la totalité dudit panneau d'obturation de l'ouverture.In order to prevent such tire flaps from smashing the said shutter panel and penetrating into the casing by damaging the materials it contains, it is already known to protect such a panel. by a protective shield, formed of a metal plate mounted on a peripheral stiffening frame, the shield covering all of said shutter panel of the opening.
Du fait de leur étendue et de leur rigidification, les boucliers de protection de type connu ont l'inconvénient de représenter une masse importante.Because of their extent and their stiffening, the shields of known type have the disadvantage of representing a large mass.
Or, tout surcroît de masse va à rencontre de la volonté des avion- neurs de diminuer la masse des éléments constitutifs d'un aéronef, sans dégrader leur fonction, afin d'augmenter la charge marchande (passagers, fret) pouvant être transportée par l'aéronef.However, any additional mass goes against the willingness of aircraft to reduce the weight of the constituent elements of an aircraft, without degrading their function, in order to increase the commercial load (passengers, freight) that can be transported by the aircraft. 'aircraft.
L'objet de la présente invention est de remédier aux inconvénients précités, en réalisant un dispositif de protection, qui est léger tout en of¬ frant une protection efficace contre les risques de projection de lambeaux de pneumatiques. A cette fin, selon l'invention, le dispositif pour la protection, dans un aéronef, du panneau d'obturation d'un trou d'homme pratiqué dans une cloison d'une case de train, est remarquable en ce qu'il comporte une membrure comprenant des bras,The object of the present invention is to overcome the aforementioned drawbacks, by providing a protection device, which is lightweight while providing effective protection against the risk of projecting tire flaps. To this end, according to the invention, the device for the protection, in an aircraft, of the shutter panel of a manhole made in a partition of a train compartment, is remarkable in that it comprises a chord comprising arms,
- qui s'étendent radialement depuis une zone centrale commune, destinée à être positionnée en regard de la partie centrale dudit panneau d'obtu¬ ration, et- Which extend radially from a common central zone, intended to be positioned opposite the central portion of said obtu¬ ration panel, and
- qui sont pourvus, à leurs extrémités libres opposées à ladite zone cen¬ trale commune, de plages aptes à s'appliquer contre ladite cloison, à la périphérie dudit trou d'homme, lorsque ladite zone centrale commune est en regard de ladite partie centrale dudit panneau.- Which are provided, at their free ends opposite to said central cen¬ tral area, beaches capable of being applied against said partition, at the periphery of said manhole, when said central common area is opposite said central portion said panel.
Ainsi, lorsque ledit dispositif de protection est mis en place sur le¬ dit panneau d'obturation, ses bras barrent l'accès à ce dernier en arrêtant les éventuels lambeaux de pneumatiques projetés en direction dudit pan¬ neau d'obturation. La présente invention est basée sur des observations et des essais de la demanderesse montrant que, en cas d'éclatement des pneumatiques des roues d'un train d'aéronef, les lambeaux qui en résultent ont des di¬ mensions comparables à celles dudit trou d'homme ou, à tout le moins, à une grande partie de l'aire de ce dernier, de sorte qu'il n'est pas néces¬ saire de protéger l'intégralité de la surface du panneau d'obturation, mais, au contraire, qu'il suffit d'en protéger une partie. En effet, étant donné les dimensions relatives du panneau d'obturation et des lambeaux de pneuma¬ tiques, au moins une partie de la membrure conforme à la présente inven- tion sera apte à arrêter lesdits lambeaux avant qu'ils n'atteignent ledit panneau.Thus, when said protective device is put in place on the said shutter panel, its arms block access to the latter by stopping any tire flaps projected towards said shutter panel. The present invention is based on observations and tests of the applicant showing that, in the event of bursting of the tires of the wheels of an aircraft train, the resulting flaps have di¬ mensions comparable to those of said hole d or at least a large part of the area of the latter, so that it is not necessary to protect the entire surface of the shutter panel, but contrary, that it suffices to protect a part of it. Indeed, given the relative dimensions of the shutter panel and tire flaps, at least a portion of the frame according to the present invention will be able to stop said flaps before they reach said panel .
De préférence, afin d'éviter que ladite membrure, percutée par des lambeaux de pneumatiques, ne frappe le panneau devant être protégé, lesdites plages d'extrémité des bras sont en saillie par rapport à la face de la membrure destinée à être dirigée vers ledit panneau. Ainsi, on ménage une distance de sécurité entre la membrure et ledit panneau.Preferably, in order to prevent said frame, struck by tire flaps, from striking the panel to be protected, said end zones of the arms project from the face of the frame intended to be directed towards said member. sign. Thus, there is a safety distance between the frame and said panel.
On remarquera que l'énergie de percussion des lambeaux de pneumatiques sur la membrure est transmise à la totalité de ladite cloison de case de train par lesdites plages d'extrémité des bras, de sorte que la dissipation de cette énergie de percussion ne soulève aucune difficulté.It will be noted that the percussion energy of the tire flaps on the chord is transmitted to the whole of said landing gear partition by said end zones of the arms, so that the dissipation of this impact energy does not raise any difficulty. .
Bien entendu, le nombre des bras de la membrure conforme à la présente invention dépend de la grandeur du trou d'homme. Toutefois, l'expérience a montré que, pour un trou d'homme de dimensions usuelles (par exemple de l'ordre de 1 /4 m2), il suffisait que la membrure conforme à l'invention soit pourvue de quatre bras formant une croix de Saint-André pour être totalement efficace.Of course, the number of arms of the frame according to the present invention depends on the size of the manhole. However, experience has shown that for a manhole of usual dimensions (for example of the order of 1/4 m 2 ), it was sufficient that the frame according to the invention is provided with four arms forming a cross of St. Andrew to be totally effective.
Ainsi, grâce à la présente invention, on obtient un dispositif de protection léger, puisque n'ayant pas à couvrir la totalité dudit panneau d'obturation. De plus, afin d'augmenter encore la légèreté de la membrure du dispositif de protection conforme à la présente invention, chaque bras peut être constitué par une lame allongée, portant au moins une nervure saillante de raidissement sur sa face destinée à être dirigée à l'opposé du- dit panneau d'obturation. De préférence, chaque bras comporte deux ner¬ vures saillantes longitudinales voisines de ses bords longitudinaux et au moins une nervure saillante transversale reliant lesdites nervures saillantes longitudinales. Lesdites nervures saillantes longitudinales et transversales peuvent ainsi former des caissons de raidissement communiquant à cha- que bras une grande rigidité, bien que principalement constitués par une lame. Les nervures transversales peuvent de plus former un caisson déli¬ mitant ladite zone centrale commune.Thus, thanks to the present invention, a light protection device is obtained, since it does not have to cover the whole of said shutter panel. In addition, in order to further increase the lightness of the frame of the protection device according to the present invention, each arm may be constituted by an elongate blade, carrying at least one projecting stiffening rib on its face intended to be directed to the opposite said shutter panel. Preferably, each arm comprises two longitudinal projecting ribs adjacent to its longitudinal edges and at least one transverse projecting rib connecting said longitudinal protruding ribs. Said longitudinal and transverse protruding ribs can thus form stiffening boxes communicating with each arm a high rigidity, although mainly constituted by a blade. The transverse ribs may further form a caisson déli¬ mitant said common central area.
Pour augmenter encore Ia rigidité de la membrure, sans en aug¬ menter beaucoup le poids, il est avantageux que ladite membrure comporte des voiles solidaires desdits bras et obturant au moins partielle¬ ment les secteurs délimités par les paires de bras adjacents. On remar¬ quera que, en plus, de tels voiles peuvent servir d'arrêt à des lambeaux de pneumatiques projetés en direction dudit panneau d'obturation.To further increase the stiffness of the frame, without increasing the weight, it is advantageous for said frame to have webs integral with said arms and at least partially closing off the sectors delimited by the pairs of adjacent arms. It will be noted that, in addition, such sails can serve as a stop for tire flaps projected towards said shutter panel.
Par ailleurs, il est usuel que ledit panneau d'obturation comporte une bordure périphérique saillante apte à s'appliquer, à la périphérie dudit trou d'homme, sur la face de ladite cloison opposée à ladite case de train et des trous répartis à la périphérie dudit panneau et servant à la fixation de ce dernier à ladite cloison, par exemple au moyen de brides de serrage permettant de pincer le bord dudit trou d'homme entre elles-mêmes et Ia- dite bordure périphérique saillante. Dans ce cas, il est avantageux que les- dits bras comportent des trous de fixation, disposés longitudinalement en retrait desdites plages d'extrémité des bras et aptes à venir en corres¬ pondance avec certains des trous de fixation dudit panneau d'obturation. Ainsi, ladite membrure peut être fixée à ladite cloison conjointement avec ledit panneau d'obturation en utilisant certains des trous de fixation dudit panneau d'obturation, ladite cloison étant alors pincée entre lesdites pla¬ ges d'extrémité des bras et ladite bordure périphérique saillante dudit pan¬ neau d'obturation. De préférence, ledit dispositif de protection selon l'invention est constitué par une pièce monolithique d'un alliage léger, par exemple obte¬ nue par fonderie ou moulage.Furthermore, it is customary for said closure panel to have a protruding peripheral edge capable of being applied, at the periphery of said manhole, on the face of said partition opposite to said landing block and of holes distributed at the periphery of said panel and for fixing the latter to said partition, for example by means of clamps for clamping the edge of said manhole between themselves and said peripheral edge protruding. In this case, it is advantageous that said arms have fixing holes, arranged longitudinally recessed from said end zones of the arms and adapted to corres¬ pondance with some of the fixing holes of said shutter panel. Thus, said chord may be attached to said partition together with said shutter panel by using some of the fixing holes of said shutter panel, said partition being then clamped between said end plates of the arms and said protruding peripheral edge of said shutter pan¬. Preferably, said protection device according to the invention is constituted by a monolithic piece of a light alloy, for example obte¬ bare by casting or molding.
Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.The figures of the appended drawing will make it clear how the invention can be realized. In these figures, identical references designate similar elements.
La figure 1 est une vue en perspective du dessous d'un aéronef, illustrant la disposition relative du caisson de voilure et de la case de train principal.Figure 1 is a perspective view of the underside of an aircraft, illustrating the relative arrangement of the wing box and the main landing gear box.
La figure 2 est une vue de face, depuis la case de train, de la cloi- son qui sépare le caisson de voilure de la case de train et dans laquelle sont aménagés deux trous d'homme, chacun d'entre eux étant muni d'un panneau d'obturation et d'un exemple de réalisation du dispositif de pro¬ tection selon l'invention.FIG. 2 is a front view, from the landing gear compartment, of the partition separating the wing box from the landing gear compartment and in which two manholes are arranged, each of them being equipped with a shutter panel and an exemplary embodiment of the pro¬ protection device according to the invention.
La figure 3 est une vue de face d'un panneau d'obturation en place dans le trou d'homme correspondant avec une vue en perspective dudit exemple de réalisation du dispositif de protection selon l'invention.Figure 3 is a front view of a shutter panel in place in the corresponding manhole with a perspective view of said embodiment of the protection device according to the invention.
La figure 4 est une vue en plan de la face dudit dispositif de l'in¬ vention destinée à être disposée en regard dudit panneau d'obturation.Figure 4 is a plan view of the face of said device of in¬ vention intended to be disposed opposite said closure panel.
La figure 5 est une vue de face de l'exemple de réalisation des fi- gures 2, 3 et 4 monté sur le panneau d'accès correspondant.Figure 5 is a front view of the exemplary embodiment of Figures 2, 3 and 4 mounted on the corresponding access panel.
La figure 6 est une vue en coupe suivant la ligne VI-VI de la figure 5.Figure 6 is a sectional view along the line VI-VI of Figure 5.
L'avion représenté sur la figure 1 comprend un fuselage 1 , deux ailes 2 symétriques par rapport audit fuselage, un caisson de voilure 3 disposé dans le fuselage 1 et destiné à fixer les deux ailes 2 et une case de train principal 4, située immédiatement à l'arrière du caisson de voilure 3, pour loger les trains de roues 5 du train d'atterrissage principal.The aircraft shown in FIG. 1 comprises a fuselage 1, two wings 2 symmetrical with respect to said fuselage, a wing box 3 disposed in the fuselage 1 and for fixing the two wings 2 and a main landing gear 4, located immediately to the rear of the wing box 3, for housing the wheels 5 of the main landing gear.
De façon usuelle, le caisson de voilure 3 présente une structure comprenant des longerons latéraux, sur lesquels sont attachées les deux ailes 2, et des longerons transversaux qui relient la structure d'une aile à celle de l'aile opposée.In the usual way, the wing box 3 has a structure comprising lateral spars, on which are attached the two wings 2, and transverse spars that connect the structure of a wing to that of the opposite wing.
Le caisson de voilure 3 est séparé de la case de train principal 4 par le longeron transversal arrière formant une cloison 6, telle qu'illustrée sur la figure 2, comportant des faces opposées 6.3 et 6.4 respectivement dirigées vers le caisson de voilure 3 et vers la case de train 4. Des trous d'homme 7 sont aménagés dans la cloison 6 pour accéder commodément, depuis la case de train 4, à l'intérieur du caisson de voilure 3 et aux maté¬ riels contenus dans ce dernier. Comme le montrent à plus grande échelle les figures 3 et 5, cha¬ que trou d'homme 7 a une géométrie de baie arrondie, dont les dimen¬ sions sont de l'ordre de plusieurs décimètres ou au plus de l'ordre du mè¬ tre.The wing box 3 is separated from the main landing gear compartment 4 by the rear transverse beam forming a partition 6, as illustrated in FIG. 2, having opposed faces 6.3 and 6.4 respectively directed towards the wing box 3 and towards 4. The manholes 7 are arranged in the partition 6 for convenient access, from the landing gear compartment 4, to the interior of the wing box 3 and to the materials contained therein. As shown on a larger scale in FIGS. 3 and 5, each manhole 7 has a rounded bay geometry, the dimensions of which are of the order of several decimetres or at most of the order of magnitude. Be.
Un panneau d'obturation 8, dont la forme correspond à celle du trou d'homme 7 correspondant, peut s'y encastrer du côté du caisson de voilure 3. Le panneau d'obturation 8 est par exemple formé par une pla¬ que métallique (aluminium) pourvue à sa périphérie d'un réseau de ner¬ vures 9 servant à le renforcer et à le manier.A shutter panel 8, whose shape corresponds to that of the manhole 7 corresponding, can be embedded on the side of the wing box 3. The shutter panel 8 is for example formed by a pla¬ metallic (aluminum) provided at its periphery with a network of ner¬ vures 9 for strengthening and handling.
Comme illustré par les figures 2 et 3 à 5, le panneau d'obturation 8 du trou d'homme 7, encastré dans celui-ci par la face 6.3 de Ia cloison dirigée vers le caisson de voilure 3, est pourvu d'un dispositif de protec¬ tion, monté sur la face 6.4 de la cloison 6 dirigée vers la case de train 4.As illustrated in FIGS. 2 and 3 to 5, the shutter panel 8 of the manhole 7, embedded therein by the face 6.3 of the partition directed towards the wing box 3, is provided with a device protec¬ tion, mounted on the face 6.4 of the partition 6 facing the box train 4.
Dans le mode de réalisation représenté sur les figures, ce dispositif de protection est constitué d'une pièce, par exemple en alliage léger, for- mant une membrure 10 en forme de croix de Saint-André comprenant quatre bras 12 rayonnant autour d'une zone centrale 1 1 commune auxdits bras 12.In the embodiment shown in the figures, this protective device consists of a part, for example a light alloy, a chord 10 in the form of a cross of Saint-André comprising four arms 12 radiating around a central zone 1 1 common to said arms 12.
Cette membrure 10, conforme à la présente invention, comporte une face 10.8 destinée à être dirigée vers le panneau d'obturation 8 correspondant et une face 10.4 destinée à être dirigée vers la case de train 4.This frame 10, according to the present invention, comprises a face 10.8 intended to be directed towards the corresponding shutter panel 8 and a face 10.4 intended to be directed towards the landing block 4.
Comme le montrent les figures 4 et 6, du côté de la face 10.8, chaque bras 12 est pourvu, à son extrémité libre, d'une plage d'extrémité 13, en saillie par rapport au reste de ladite face 10.8, par exemple du fait que celle-ci comporte un ou plusieurs épaulements 15.As shown in FIGS. 4 and 6, on the side of the face 10.8, each arm 12 is provided, at its free end, with an end strip 13, projecting from the rest of said face 10, 8 for example it has one or more shoulders 15.
Pour protéger le panneau d'obturation 8, la zone centrale commune 1 1 de la membrure est disposée en regard de la partie centraleTo protect the shutter panel 8, the common central area 1 1 of the frame is arranged facing the central portion
8C du panneau d'obturation 8 et les plages d'extrémité saillantes sont ap- pliquées contre la face 6.4 de la cloison 6, à la périphérie du trou d'homme 7 (voir les figures 3 et 5).8C of the shutter panel 8 and the projecting end pads are applied against the face 6.4 of the partition 6, at the periphery of the manhole 7 (see Figures 3 and 5).
Chaque bras 12 est constitué par une lame allongée 14, portant, du côté de la face 10.4, des nervures de raidissement longitudinales 1 6 et 17 et des nervures de raidissement transversales 18 et 19. Les nervures longitudinales 16 et 17 sont voisines des bords longitudinaux du bras 12 et les nervures transversales 18 et 1 9 relient entre elles lesdites nervures longitudinales 16 et 17 pour former des caissons de raidissement. Il est avantageux que de telles nervures transversales 18 forment un caisson délimitant la zone centrale commune 1 1 . Par ailleurs, dans les secteurs délimités par des paires de bras 12 adjacents, la membrure 10 comporte des voiles de raidissement 20 soli¬ daires desdits bras et obturant au moins partiellement lesdits secteurs.Each arm 12 is constituted by an elongate blade 14, bearing, on the side of the face 10.4, longitudinal stiffening ribs 1 6 and 17 and transverse stiffening ribs 18 and 19. The longitudinal ribs 16 and 17 are close to the longitudinal edges arm 12 and transverse ribs 18 and 19 connect said longitudinal ribs 16 and 17 together to form stiffening boxes. It is advantageous for such transverse ribs 18 to form a box delimiting the common central zone 11. Furthermore, in the sectors delimited by pairs of arms 12 adjacent, the frame 10 comprises stiffening webs 20 soli¬ daires said arm and at least partially closing said sectors.
Comme Ie montre Ia figure 3, le panneau d'obturation 8 comporte, de façon connue, des trous traversants 21 , répartis à sa périphérie et ser- vant à sa fixation à la cloison 6. Aussi, lesdits bras 12 comportent égale¬ ment des trous de fixation 22, disposés longitudinalement en retrait des plages d'extrémité saillantes 13 et aptes à venir en coïncidence avec cer¬ tains des trous de fixation périphériques 21 du panneau d'obturation 8 (voir Ia figure 3).As shown in FIG. 3, the shutter panel 8 comprises, in known manner, through-holes 21 distributed around its periphery and serving In addition, said arms 12 also comprise fixing holes 22, arranged longitudinally recessed from the projecting end plates 13 and able to come into coincidence with some of the peripheral fastening holes. 21 of the shutter panel 8 (see Figure 3).
Le panneau d'obturation 8 comporte de plus, également de façon connue, une bordure périphérique saillante 23 apte à s'appliquer contre la face 6.3 de la cloison 6, des brides de serrage 24 à large tête étant pré¬ vues, de façon connue, pour coopérer avec les trous 21 du panneau 8 pour prendre appui sur la face 6.4 de la cloison 6 et plaquer la bordure saillante 23 contre ladite face 6.3, avec éventuelle interposition d'un joint 25.The shutter panel 8 further comprises, also in a known manner, a projecting peripheral rim 23 adapted to be applied against the face 6.3 of the partition 6, with wide-head clamping flanges 24 being pre¬ seen, in a known manner , to cooperate with the holes 21 of the panel 8 to bear on the face 6.4 of the partition 6 and to press the projecting edge 23 against said face 6.3, with possible interposition of a seal 25.
Dans ce cas, on prévoit des moyens de fixation 26, aptes à coopé¬ rer avec les paires de trous 21 et 22 en regard pour fixer la membrure 10 à la cloison 6, conjointement avec ledit panneau d'obturation 8. La cloison 6 est alors de plus pincée entre les plages d'extrémité 13 des bras 12 et la bordure périphérique saillante 23 du panneau d'obturation 8. In this case, fastening means 26 are provided, able to cooperate with the pairs of holes 21 and 22 opposite to fix the frame 10 to the partition 6, together with said shutter panel 8. The partition 6 is then more pinch between the end areas 13 of the arms 12 and the projecting peripheral edge 23 of the closure panel 8.

Claims

REVENDICATIONS
1 . Dispositif pour la protection, dans un aéronef, du panneau d'ob¬ turation (8) d'un trou d'homme (7) pratiqué dans une cloison (6) d'une case de train (4), caractérisé en ce qu'il est constitué par une membrure (10) comportant une face (10.8) destinée à être dirigée vers ledit panneau d'obturation (8) et une face (10.4) destinée à être dirigée vers ladite case de train (4) et comprenant des bras (12),1. Device for the protection, in an aircraft, of the ob¬ turing panel (8) of a manhole (7) made in a partition (6) of a landing gear compartment (4), characterized in that it is constituted by a chord (10) having a face (10.8) intended to be directed towards said shutter panel (8) and a face (10.4) intended to be directed towards said landing block (4) and comprising arm (12),
- qui s'étendent radialement depuis une zone centrale commune (1 1 ), destinée à être positionnée en regard de la partie centrale (8C) dudit panneau d'obturation (8), et- Which extend radially from a common central area (1 1), intended to be positioned facing the central portion (8C) of said shutter panel (8), and
- qui sont pourvus, à leurs extrémités libres opposées à ladite zone cen¬ trale commune (1 1 ), de plages (13) aptes à s'appliquer contre ladite cloison (6), à la périphérie dudit trou d'homme (7), lorsque ladite zone centrale commune (1 1 ) est en regard de ladite partie centrale (8C) dudit panneau (8).- Which are provided, at their free ends opposite to said common cen¬ tral area (1 1), beaches (13) adapted to be applied against said partition (6), at the periphery of said manhole (7) when said common central zone (1 1) is opposite said central portion (8C) of said panel (8).
2. Dispositif de protection selon la revendication 1 , caractérisé en ce que lesdites plages d'extrémité (13) des bras (12) sont en saillie par rapport à la face (10.8) de la membrure (10) destinée à être dirigée vers ledit panneau d'obturation (8).2. Protection device according to claim 1, characterized in that said end lands (13) of the arms (12) project from the face (10.8) of the chord (10) intended to be directed towards said shutter panel (8).
3. Dispositif de protection selon l'une des revendications 1 ou 2, caractérisé en ce que ladite membrure (10) comporte quatre bras disposés en croix de Saint-André.3. Protection device according to one of claims 1 or 2, characterized in that said frame (10) comprises four arms arranged in a cross of St. Andrew.
4. Dispositif de protection selon l'une des revendications 1 à 3, caractérisé en ce que chaque bras (12) est constitué par une lame allon¬ gée, portant au moins une nervure saillante de renfort (16 à 19) sur sa face (10.4) destinée à être dirigée à l'opposé dudit panneau d'obturation (8) 4. Protective device according to one of claims 1 to 3, characterized in that each arm (12) is constituted by an allon¬ gated blade, carrying at least one protruding rib of reinforcement (16 to 19) on its face ( 10.4) intended to be directed away from said shutter panel (8)
5. Dispositif de protection selon la revendication 4, caractérisé en ce que chaque bras (12) comporte deux nervures saillantes longitudinales (16, 17) voisines de ses bords longitudinaux.5. Protection device according to claim 4, characterized in that each arm (12) has two longitudinal protruding ribs (16, 17) adjacent to its longitudinal edges.
6. Dispositif de protection selon la revendication 5, caractérisé en ce que chaque bras (12) comporte au moins une nervure saillante transversale (18, 19) reliant lesdites nervures saillantes longitudi¬ nales (1 6, 17).6. Protection device according to claim 5, characterized in that each arm (12) comprises at least one transverse projecting rib (18, 19) connecting said longitudinal protruding ribs (1 6, 17).
7. Dispositif de protection selon la revendication 6, caractérisé en ce que chaque bras (12) comporte plusieurs nervures sail- lantes transversales (18, 19) formant des caissons de raidissement avec lesdites nervures saillantes longitudinales (16, 17).7. Protective device according to claim 6, characterized in that each arm (12) comprises a plurality of transverse ribs (18, 19) forming stiffening caissons with said longitudinal protruding ribs (16, 17).
8. Dispositif de protection selon la revendication 7, caractérisé en ce que des nervures transversales (18) desdits bras (12) formant un caisson délimitant ladite zone centrale commune (1 1 ). 8. Protection device according to claim 7, characterized in that transverse ribs (18) of said arms (12) forming a box defining said common central area (1 1).
9. Dispositif de protection selon l'une des revendications 1 à 8, caractérisé en ce que ladite membrure (10) comporte des voiles (20) soli¬ daires desdits bras (12) et obturant au moins partiellement les secteurs délimités par les paires de bras (12) adjacents.9. Protective device according to one of claims 1 to 8, characterized in that said frame (10) comprises webs (20) soli¬ daires said arms (12) and closing at least partially the sectors delimited by the pairs of arms (12) adjacent.
10. Dispositif de protection selon l'une des revendications 1 à 9, pour un panneau d'obturation (8) comportant des trous (21 ) à sa périphé¬ rie, servant à sa fixation à ladite cloison (6), caractérisé en ce que lesdits bras (12) comportent des trous de fixation (22), disposés longitudinalement en retrait desdites plages d'extrémité (13) des bras (12) et aptes à venir en correspondance avec certains des trous de fixation (21 ) dudit panneau d'obturation (8).10. Protective device according to one of claims 1 to 9, for a closure panel (8) having holes (21) at its peripheré¬ rie, for its attachment to said partition (6), characterized in that said arms (12) comprise fixing holes (22), arranged longitudinally recessed from said end lands (13) of the arms (12) and able to come into correspondence with some of the fixing holes (21) of said panel of said shutter (8).
1 1 . Dispositif de protection selon la revendication 10, pour un panneau d'obturation (8) comportant une bordure périphérique saillante (23) apte à s'appliquer sur la face (6.3) de ladite cloison (6) opposée audit dispositif de protection. caractérisé en ce que ladite membrure (10) est apte à être fixée à ladite cloison (6) conjointement avec ledit panneau d'obturation (8) en utilisant certains desdits trous (21 ) prévus à la périphérie de ce dernier, ladite cloi¬ son (6) étant alors pincée entre lesdites plages d'extrémité (13) des bras (12) et ladite bordure périphérique saillante (23) dudit panneau d'obtura¬ tion (8). 1 1. Protective device according to claim 10, for a shutter panel (8) having a protruding peripheral edge (23) adapted to be applied on the face (6.3) of said partition (6) opposite to said protective device. characterized in that said chord (10) is adapted to be fixed to said partition (6) together with said shutter panel (8) by using some of said holes (21) provided at the periphery thereof, said cloi¬ sound (6) being then clamped between said end lands (13) of the arms (12) and said protruding peripheral edge (23) of said obtura¬ tion panel (8).
PCT/FR2005/002265 2004-09-20 2005-09-13 Device for protecting a closing panel of a manhole embodied in the partition wall of an aircraft wheel train WO2006032754A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0409905A FR2875476B1 (en) 2004-09-20 2004-09-20 DEVICE FOR PROTECTING THE SHUTTER PANEL OF A MANUAL HOLE IN A CASE OF AIRCRAFT TRAIN BOX
FR0409905 2004-09-20

Publications (1)

Publication Number Publication Date
WO2006032754A1 true WO2006032754A1 (en) 2006-03-30

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ID=34949010

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Application Number Title Priority Date Filing Date
PCT/FR2005/002265 WO2006032754A1 (en) 2004-09-20 2005-09-13 Device for protecting a closing panel of a manhole embodied in the partition wall of an aircraft wheel train

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Country Link
FR (1) FR2875476B1 (en)
WO (1) WO2006032754A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3023263B1 (en) * 2014-07-03 2016-07-01 Airbus GATEWAY SUITABLE FOR ACCESSING AN AIRCRAFT COMPARTMENT VIA A MAN'S HOLE

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE715004C (en) * 1938-08-16 1941-12-12 Henschel Flugzeugwerke Ag Cover plate with diagonal or radial stiffeners for openings in sheet metal walls, especially on aircraft

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE715004C (en) * 1938-08-16 1941-12-12 Henschel Flugzeugwerke Ag Cover plate with diagonal or radial stiffeners for openings in sheet metal walls, especially on aircraft

Also Published As

Publication number Publication date
FR2875476B1 (en) 2007-04-13
FR2875476A1 (en) 2006-03-24

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