Device for adjusting the assembly of a first aircraft part onto a second aircraft part, aircraft cabin and associated method

Abstract

Adjustment device for mounting a first aircraft part onto a second aircraft part, aircraft cabin, and associated method. The device (22) comprises a base body (30) and an external adjustment member (32), configured to be mounted on the base body (30) at an external angular position selected from a plurality of predefined external angular positions. The device (22) includes an internal adjustment member (34), configured to be mounted on the external adjustment member (32) at an internal angular position selected from a plurality of predefined internal angular positions around an internal position adjustment axis (B-B'), offset from the external position adjustment axis (A-A').For each predefined internal angular position, the internal adjustment member (34) is configured to be placed in an elevation position chosen from a plurality of predefined elevation positions relative to the base body (30) along the internal position adjustment axis (B-B'). Figure for the abbreviation: Figure 4.

Description

Title of the invention: Device for adjusting the mounting of a first aircraft part onto a second aircraft part, aircraft cabin and associated method

[0001] The present invention relates to a device for adjusting the mounting of a first aircraft part onto a second aircraft part, comprising:

[0002] - a basic body, intended to be fixed onto the first part;

[0003] - an external adjustment member, configured to be mounted on the base body in an external angular position chosen from a plurality of predefined external angular positions around an external position adjustment axis;

[0004] - an internal adjustment member, configured to be mounted on the member external adjustment in an internal angular position chosen from a plurality of predefined internal angular positions around an internal position adjustment axis, the internal position adjustment axis being off-center with respect to the external position adjustment axis, the second part being intended to be fixed on the internal adjustment member.

[0005] Such a device is intended in particular to connect the first part and the second part by compensating for manufacturing and positioning clearances, for example within an aircraft cabin.

[0006] The first part is in particular a first interior cabin trim piece, especially a side cabin trim piece. The second part is advantageously a second interior cabin trim piece, especially a window panel, and / or is a structural fuselage part, such as a longeron and / or a rib.

[0007] The assembly of an aircraft cabin structure and the interior fitting of this structure are generally carried out respecting manufacturing and assembly tolerances which allow a certain flexibility, taking into account the complexity of the parts involved and the strong mechanical stresses applied in particular to the aircraft structure.

[0008] However, for functional and aesthetic reasons, it is necessary to position certain trim pieces, such as side cabin trims, precisely in relation to other pieces, such as porthole panels.

[0009] In this context, it is sometimes necessary to compensate for the gaps resulting from the manufacturing tolerances of the parts and / or the assembly tolerances between the parts in order to allow a more precise adjustment of one part on another.

[0010] To achieve this, it is known to use an adjustment device of the aforementioned type, in which the operator fixes the body of the device onto the first part. The operator then adjusts the angular position of an external disk relative to the body around the external adjustment axis, and the angular position of an internal disk relative to the external adjustment member around the internal adjustment axis. The second part is then mounted onto the internal adjustment member.

[0011] Since the adjustment axes are off-center, it is possible to adjust the position of the first part relative to the second part in a plane perpendicular to the adjustment axes by modifying the angular position of the internal and external disks.

[0012] Such an adjustment device is not entirely satisfactory. Indeed, play between the first and second parts can also exist outside the adjustment plane provided by the aforementioned adjustment device. The operator must often perform combined actions both within the adjustment plane and along the axis perpendicular to the adjustment plane.

[0013] In this case, the operator sometimes has to perform a series of adjustment and disassembly steps before achieving a functionally and aesthetically satisfactory setting. This is tedious and slows down the assembly of the casing.

[0014] One object of the invention is to provide an adjustment device that is simple to use and that easily and accurately compensates for play between the first part and the second part, along three axes.

[0015] For this purpose the invention relates to an adjustment device as defined above, characterized in that, for each predefined internal angular position, the internal adjustment member is configured to be placed in an elevation position chosen from among a plurality of predefined elevation positions relative to the base body along the internal position adjustment axis.

[0016] The adjustment device according to the invention may comprise one or more of the following features, taken individually or in any technically possible combination:

[0017] - the external adjustment member is mounted in the base body via a linkage helical along the external position adjustment axis and / or in which the internal adjustment member is mounted in the external adjustment member via a helical link along the internal position adjustment axis;

[0018] - the external adjustment member comprises a peripheral surface provided of a thread, the base body comprising a housing for receiving the external adjusting member provided with a complementary thread configured to cooperate with the thread on the external adjusting member and form the helical connection between the external adjusting member and the base body, and / or in which the member The internal adjustment member comprises a peripheral surface provided with a thread, the external adjustment member comprising an insertion hole for the internal adjustment member provided with a complementary thread configured to cooperate with the thread on the internal adjustment member and form the helical connection between the internal adjustment member and the external adjustment member;

[0019] - the device includes a reversible locking mechanism for the organ external adjustment configured to lock the external adjustment member and the internal adjustment member in the chosen elevation position;

[0020] - the reversible locking mechanism of the external adjustment member includes splines extending from the external adjustment member, the splines projecting radially from the internal position adjustment axis by defining intermediate spaces, the reversible locking mechanism comprising at least one locking rod mounted in the base body and received in an intermediate space between two splines, advantageously at least two locking rods mounted in a removable manner in the base body and received in a respective intermediate space between two splines;

[0021] - it includes a reversible locking mechanism for the internal adjustment member relative to the external adjustment unit in the chosen angular position;

[0022] - the reversible locking mechanism of the internal adjustment member with respect to to the external adjusting member includes a first indexing ring of the internal adjusting member relative to the external adjusting member extending around the internal position adjustment axis on one of the internal adjusting member and the external adjusting member, and at least one cooperation member with the first indexing ring, projecting towards the first indexing ring from the other of the internal adjusting member and the external adjusting member;

[0023] - the reversible locking mechanism of the internal adjustment member with respect to to the external adjusting member includes a second indexing ring extending around the internal position adjustment axis on the other of the internal adjusting member and the external adjusting member, the second indexing ring comprising a plurality of cooperating members with the first indexing ring projecting towards the second indexing ring;

[0024] - it includes a system for fixing the second part onto the adjustment member internally, the fastening system of the second part on the internal adjustment member being off-center with respect to the internal position adjustment axis;

[0025] - the system for fixing the second part onto the internal adjustment member includes a fixing housing provided in the internal adjustment member away from the internal position adjustment axis, and a reversible fixing member of the second part, configured to be reversibly fixed in the fixing housing;

[0026] - the base body includes a plate, the mounting adjustment device featuring a reversible fixing system for the plate on the first piece.

[0027] The invention also relates to an aircraft cabin comprising a first part, a second part, and a device as defined above, connecting the first part to the second part.

[0028] The aircraft cabin according to the invention may comprise one or more of the following features, taken individually or in any technically possible combination:

[0029] - the first part is a first aircraft cabin lining part, in in particular a side trim of the aircraft cabin, the second piece being a second piece of aircraft cabin trim, in particular a window panel.

[0030] The invention also relates to a method for fitting a first part onto a second part in an aircraft cabin, the method comprising the following steps:

[0031] - supply of an adjustment device for the assembly as defined above;

[0032] - fixing the base body onto the first part;

[0033] - mounting the external adjustment member on the base body in a position external angular position chosen from a plurality of predefined external angular positions around the external position adjustment axis;

[0034] - mounting the internal adjusting member onto the external adjusting member in one internal angular position selected from a plurality of predefined internal angular mounting positions around the internal position adjustment axis; characterized by the placement of the internal adjustment member in an elevation position selected from a plurality of predefined elevation positions relative to the base body along the internal position adjustment axis.

[0035] The adjustment method according to the invention may comprise one or more of the following features, taken individually or in any technically possible combination:

[0036] - the external adjusting member is mounted in the base body via a linkage helical along the external position adjustment axis, the placement of the internal adjustment member in the chosen elevation position relative to the base body, including the rotational drive of the external adjustment member relative to the base body around the external position adjustment axis via the helical linkage, and / or in which the internal adjustment member is mounted in the external adjustment member via a helical linkage along the internal position adjustment axis, the placement of the internal adjustment member in the elevation position chosen in relation to the base body including the rotational drive of the internal adjustment member relative to the external adjustment member around the internal position adjustment axis via the helical linkage.

[0037] The invention will be better understood upon reading the following description, given solely by way of example, and made with reference to the accompanying drawings, in which:

[0038] - [Fig. 1] Fig. 1 is a partial cross-sectional view of a detail of an aircraft cabin comprising a first part assembled on a second part and a first adjustment device for assembly according to the invention, connecting the first part to the second part;

[0039] - [Fig.2] [Fig.2] is a view analogous to [Fig.1], taken in section along a plane axial median of the mounting adjustment device;

[0040] - [Fig.3] [Fig.3] is a perspective view of the various components of the device adjustment to the assembly in a pre-assembled configuration; and

[0041] - [Fig.4] [Fig.4] is a view analogous to [Fig.3], in a configuration disassembled.

[0042] A detail of an aircraft cabin 10 according to the invention is illustrated in [Fig. 1]. The aircraft cabin 10 is delimited within a fuselage 12 of the aircraft shown schematically in [Fig. 1].

[0043] The aircraft cabin 10 delimits a central interior space 14 in which the aircraft crew and passengers move about.

[0044] The interior space 14 of the cabin 10 extends along a longitudinal axis X of the aircraft, visible in [Fig. 1]. In the cabin 10, the interior space 14 is delimited laterally and vertically by the fuselage 12 along an axis Y transverse to the longitudinal axis X and along a vertical axis Z perpendicular to the longitudinal axis X.

[0045] The aircraft cabin 10 is provided with an internal lining 16 which extends along the fuselage 12. In this example, the internal lining 16 comprises at least a first part 18 and a second part 20, the first part 18 being assembled on the second part 20.

[0046] The aircraft cabin 10 further includes a device 22 for adjusting the assembly according to the invention, interposed between the first part 18 and the second part 20.

[0047] The first part 18 is, for example, a side trim panel of the aircraft, extending longitudinally along the fuselage 12 from a cabin floor. In a known manner, the side trim panel includes, for example, supports and / or housings for at least one table, housings for receiving objects and / or at least one storage compartment for objects.

[0048] The first part 18 comprises at least one outer wall 24 intended to be assembled onto the second part 20. In this example, the outer wall 24 generally extends along a vertical plane, parallel to the plane defined by the longitudinal axis X and the vertical axis Z.

[0049] The outer wall 24 defines at least one housing 25 for receiving the mounting adjustment device 22 (visible in [Fig.2]).

[0050] The second part 20 is, for example, a window panel that is fixed to the fuselage 12 of the aircraft. The window panel includes, in particular, a support wall 26 that extends parallel to the outer wall 24 of the first part 18.

[0051] The support wall 26 is here formed of two profiles assembled one on top of the other. It defines at least one opening 28 for the assembly of the adjustment device for mounting on the second part 20 (visible in [Fig.2]).

[0052] As illustrated by Figures 1 and 2, the assembly adjustment device 22 connects the first part 18 to the second part 20. It compensates for positioning and manufacturing clearances between the first part 18 and the second part 20 in the plane formed by the X and Z axes, and also, according to the invention, along an elevation axis which is here parallel to the transverse axis Y.

[0053] As illustrated by Figures 3 and 4, the mounting adjustment device 22 comprises a base body 30 fixed to the second part 20 by being partially inserted into the housing 25, an external adjustment member 32 configured to be mounted on the base body 30 in an external angular position selected from a plurality of external angular mounting positions around an external position adjustment axis AA'.

[0054] The mounting adjustment device 22 further comprises an internal adjustment member 34, configured to be mounted on the external adjustment member 32 in an internal angular position chosen from a plurality of predefined internal angular mounting positions around an internal position adjustment axis BB'.

[0055] The mounting adjustment device 22 also includes a mechanism 36 for locking the external adjustment member 32 relative to the base body 30 in the selected external angular position, and in the selected elevation position, and a mechanism 38 for locking the internal adjustment member 34 relative to the external adjustment member 32 in the selected internal angular position (visible in [Fig.4]).

[0056] It includes a system 40 for fixing the second part 20 on the internal adjustment member 34 and a system 42 for fixing the base body 30 on the first part 18.

[0057] As will be seen below, the external adjustment member 32, and also the internal adjustment member 34, are configured to be placed in an elevation position chosen from among a plurality of predefined elevation positions relative to the body along the external position adjustment axis A-A' and the internal position adjustment axis B-B'.

[0058] As illustrated by [Fig.4], the base body 30 comprises a mounting plate 50 on the first part 18, a central skirt 52 projecting from the mounting plate 50, defining a through housing 54 for receiving the external adjusting member 32 and at least one socket 56 for receiving a fixing member for the locking mechanism 36 of the external adjusting member 32 in the chosen angular position.

[0059] The plate 50 protrudes laterally from the central skirt 52 and the sockets 56.

[0060] The central skirt 52 and the sockets 56 define a relief of complementary shape to the receiving housing 25 provided in the outer wall 24 of the first part 18. Thus, the central skirt 52 and the sockets 56 are configured to fit into the housing 25, the plate 50 pressing against the outer wall 24 at the periphery of the housing 25.

[0061] As can be seen in [Fig.4], the central skirt 52 has a peripheral internal surface 60 delimiting the receiving housing 54.

[0062] The peripheral internal surface 60 is here provided with a thread 62 intended to cooperate with the external adjustment member 32.

[0063] The receiving housing 54 thus has a circular cross-section, and a central axis which forms the A-A' axis for external position adjustment of the external adjustment member 32.

[0064] The bushings 56 extend here in the continuation of the central skirt 52, projecting radially from the central skirt 52.

[0065] In the example shown in [Fig.4], the base body 30 has two sockets 56 diametrically opposed with respect to the external position adjustment axis A-A'.

[0066] The external adjusting member 32 comprises a cylindrical shaft 70, configured to fit into the receiving housing 54, an internal sleeve 72 visible in particular on [Fig.2], disposed in the shaft 70 being offset from the shaft 70, the internal sleeve 72 defining an insertion hole 74 of the internal adjusting member 34.

[0067] The external adjustment member 32 further comprises a transverse wall 76 substantially perpendicular to the external position adjustment axis A-A' and connecting an edge of the barrel 70 to an edge of the internal sleeve 72.

[0068] The barrel 70 is cylindrical with an axis corresponding to the external position adjustment axis A-A'.

[0069] The barrel 70 externally delimits a thread 77 intended to cooperate with the thread 62 delimited on the peripheral internal surface 60 of the receiving housing 54.

[0070] Thus, by the cooperation between the threads 62, 77, the external adjusting member 32 is mounted in the base body 30 following a helical connection of axis AA' corresponding to the external position adjustment axis, which allows an adjustment of its external angular mounting position relative to the base body 30, and also of its elevation position relative to the base body 30, along the external position adjustment axis A-A'.

[0071] The internal sleeve 72 is also cylindrical, and is offset with respect to the external position adjustment axis AA' along an axis corresponding to the internal position adjustment axis B-B'.

[0072] The external position adjustment axis A-A' and the internal position adjustment axis B-B' are thus parallel to each other, being offset from each other. They extend here perpendicularly to the plane formed by the X and Z axes.

[0073] The insertion hole 74 is here through-hole. It also has a cylindrical shape with an axis corresponding to the internal position adjustment axis B-B'. The insertion hole 74 opens through the transverse wall 76.

[0074] The transverse wall 76 extends radially beyond the shaft 70, defining a collar 78. The transverse wall 76 closes the intermediate space 80 between the inner sleeve 72 and the insertion hole 74.

[0075] The internal adjustment member 34 comprises a cylinder 90 inserted into the insertion hole 74 and a head 92, projecting out of the insertion hole 74 to bear against the transverse wall 76.

[0076] The cylinder 90 is movable in translation along the axis BB' of the insertion hole 74. The cylinder 90 is also movable in rotation around the internal position adjustment axis BB' when the head 92 is located away from the transverse wall 76.

[0077] The head 92 protrudes radially beyond the cylinder 90, at one end of the cylinder 90.

[0078] In this example, it has a projecting peripheral edge 94 which delimits a cup 96, opening away from the insertion hole 74.

[0079] The locking mechanism 36 of the external adjustment member 32 relative to the base body 30 is configured to lock the external adjustment member 32 relative to the body in the chosen external angular position, and in the chosen elevation position.

[0080] In this example, the same locking mechanism 36 simultaneously locks the external adjustment member 32 relative to the base body 30 in rotation around the external position adjustment axis AA' and in translation along this axis A-A'.

[0081] In this example, it comprises, for each socket 56, a tapped hole 100 formed in the socket 56, and grooves 102 arranged along the peripheral edge of the collar 78, the grooves 102 delimiting between each other two by two intermediate spaces 104.

[0082] The locking mechanism 36 further comprises, for each tapped hole 100, a locking member 106 comprising a rod 108 intended to be inserted into the tapped hole, and to be indexed in an intermediate space 104 between two grooves 102.

[0083] Each intermediate space 104 between two splines 102 defines a predefined external annular mounting position around the external position adjustment axis A-A'. Each intermediate space 104 defines a distinct angular orientation of the insertion hole 74 of the internal adjustment member 34 around the axis A-A'.

[0084] The locking mechanism 38 of the internal adjusting member 34 on the external adjusting member 32 comprises in this example a first toothed ring 110, carried by the external adjusting member 32, at the level of the transverse wall 76 and a second toothed ring 112 carried by the internal adjusting member 34 under the head 92 opposite the cup 96.

[0085] The respective teeth of the first toothed ring 110 and the second toothed ring 112 define a plurality of predefined internal angular mounting positions around the internal position adjustment axis B-B'.

[0086] Thus, the internal adjusting member 34 can be pivoted relative to the external adjusting member 32 by disengaging the first toothed ring 110 from the second toothed ring 112 and can be locked in the chosen internal angular position by re-engaging the first toothed ring 110 in the second toothed ring 112.

[0087] The fastening system 40 of the second part 20 on the internal adjustment member 34 includes an offset fastening housing 120 provided in the internal adjustment member 34, and a fastening member 122 intended to be inserted through the fastening housing 120 to engage in the assembly opening 28 on the second part 20.

[0088] The fixing housing 120 extends parallel to the internal position adjustment axis BB' which constitutes the central axis of cylinder 90.

[0089] It opens into the head 92 and opposite, at the free end of the cylinder 90. The angular orientation of the fixing housing 120 around the internal position adjustment axis B-B' can be adjusted by choosing an angular position selected from the plurality of predefined internal angular mounting positions.

[0090] Thus, by choosing an external angular position selected from the plurality of external angular mounting positions around the axis AA' and by choosing an internal angular position selected from a plurality of internal angular positions With predefined mounting around the B-B' axis, it is possible to move the 120 fixing housing in a plane perpendicular to the A-A' and B-B' axes.

[0091] It is thus possible to adjust the relative position of the mounting housing 120 with respect to the assembly opening 28 in a simple manner. Furthermore, the rotation of the external adjusting member 32 with respect to the base body 30 in the housing 54 by cooperation between the threads 62, 77 makes it possible to adjust the elevation position of the external adjusting member 32 and the internal adjusting member 34 along the internal position adjustment axis B-B' to apply the free edge of the internal adjusting member 34 against the support wall 26.

[0092] The fixing system 42 of the base body 30 on the first part 18 comprises a plurality of through holes 130 provided in the plate 50, a plurality of tapped holes (not shown), provided in the outer wall 24 coinciding with the through holes 130, and fixing members (not shown) mounted through the holes 130 and housed in the tapped holes.

[0093] A method for mounting the first aircraft part 18 onto the second aircraft part 20 will now be described.

[0094] Initially, the first aircraft part 18 is supplied, the second aircraft part 20 having been previously mounted on the fuselage 12 of the aircraft.

[0095] The mounting adjustment device 22 is then mounted on the first part 18. The central skirt 52 and each bushing 56 of the base body 30 is inserted into the housing 25 provided in the outer wall 24. The fasteners of the fastening system 42 are inserted through the through holes 130 and are screwed into the corresponding tapped holes provided in the support wall 26.

[0096] The plate 50 is then held fixedly against the outer wall 24, the external adjusting member 32 is inserted into the receiving housing 54 and the internal adjusting member 34 is inserted into the external adjusting member 32.

[0097] Then, the first piece 18 is brought into the vicinity of the second piece 20 and is positioned relative to the second piece 20.

[0098] Taking into account manufacturing and assembly clearances, the fixing housing 120 provided in the internal adjustment member 34 is not necessarily aligned with the assembly opening 28 provided in the support wall 26.

[0099] Furthermore, the internal adjustment member 34 is not necessarily arranged in support without constraint on the support wall 26 of the second part 20, around the assembly opening 28.

[0100] The operator therefore performs the adjustment during assembly. He rotates the external adjustment member 32 relative to the base body 30 around the axis A-A', until the internal adjustment member 34 is positioned at a chosen elevation relative to the base body 30 along the internal position adjustment axis BB ', in which advantageously the internal adjusting member 34 is placed in support without constraint on the support wall 26 of the second part 20, around the assembly opening 28

[0101] Furthermore, to place the fixing housing 120 in coincidence with the assembly opening 28, the operator rotates the external adjusting member 32 around the axis A-A' by an angular displacement of less than 360° to a predefined external angular mounting position chosen around the axis A-A' and / or rotates the internal adjusting member 34 relative to the external adjusting member 32 around the axis B-B', to a predefined internal angular mounting position chosen around the axis B-B'.

[0102] Having done this, the operator activates the locking mechanism 38 of the internal adjustment member 34 relative to the external adjustment member 32 by cooperation between the first toothed ring 110 and the second toothed ring 112.

[0103] Then, it inserts a locking member 106 through an intermediate space 104 between two grooves 102 aligned with the tapped hole 100 provided in each sleeve 56. This locks the external adjusting member 32 in rotation and translation relative to the base body 30 along the axis A-A', thus activating the locking mechanism 36.

[0104] The mounting adjustment device 22 which connects the first part 18 to the second part 20 thus compensates for any positioning and / or manufacturing play between the first part 18 and the second part 20. This compensation of play exists both in a plane perpendicular to the fixing axis of the first part 18 with respect to the second part 20, and also along the fixing axis of the first part 18 with respect to the second part 20, in order to achieve an unconstrained contact between the first part 18 and the second part 20.

[0105] The adjustment is made along three axes, which simplifies the mounting of the first part 18 on the second part 20. The assembly is simple, and requires only one action, instead of two combined actions.

[0106] Alternatively, the internal adjustment member 34 is connected to the external adjustment member 32 by a helical linkage allowing translational and rotational movement of the internal adjustment member 34 relative to the external adjustment member 32 along the internal position adjustment axis B-B'. The linkage between the external adjustment member 32 and the base body 30 is then not necessarily a helical linkage.

Claims

Demands

1. Fitting device (22) for fitting a first aircraft part (18) onto a second aircraft part (20), comprising: - a base body (30), intended to be fixed onto the first part (18), - an external fitting member (32), configured to be mounted on the base body (30) in an external angular position selected from a plurality of predefined external angular positions around an external position fitting axis (A-A');- an internal adjustment member (34), configured to be mounted on the external adjustment member (32) in an internal angular position chosen from a plurality of predefined internal angular positions around an internal position adjustment axis (B-B'), the internal position adjustment axis (B-B') being offset with respect to the external position adjustment axis (A-A'), the second part (20) being intended to be fixed on the internal adjustment member (34), characterized in that, for each predefined internal angular position, the internal adjustment member (34) is configured to be placed in an elevation position chosen from a plurality of predefined elevation positions with respect to the base body (30) along the internal position adjustment axis (B-B').

2. Fitting adjustment device (22) according to claim 1, wherein the external fitting member (32) is mounted in the base body (30) via a helical linkage along the external position adjustment axis (A-A') and / or wherein the internal fitting member (34) is mounted in the external fitting member (32) via a helical linkage along the internal position adjustment axis (B-B').

3. A mounting adjustment device (22) according to claim 2, wherein the external adjusting member (32) comprises a peripheral surface provided with a thread (77), the base body (30) comprising a housing (54) for receiving the external adjusting member (32) provided with a complementary thread (62) configured to cooperate with the thread (77) on the external adjusting member (32) and form the helical connection between the external adjusting member (32) and the base body (30), and / or wherein the internal adjusting member (34) comprises a peripheral surface provided of a thread, the external adjusting member (32) comprising an insertion hole (74) of the internal adjusting member (34) provided with a complementary thread configured to cooperate with the thread on the internal adjusting member (34) and form the helical link between the internal adjusting member (34) and the external adjusting member (32).

4. Mounting adjustment device (22) according to any one of claims 1 to 3, comprising a reversible locking mechanism (36) for the external adjusting member (32) configured to lock the external adjusting member (32) and the internal adjusting member (34) in the selected elevation position.

5. Fitting adjustment device (22) according to claim 4, wherein the reversible locking mechanism (36) of the external adjusting member (32) comprises splines (102) extending from the external adjusting member (32), the splines (102) projecting radially from the internal position adjustment axis (B-B') by defining intermediate spaces (104), the reversible locking mechanism (36) comprising at least one locking rod (108) mounted in the base body (30) and received in an intermediate space (104) between two splines (102), advantageously at least two locking rods (108) mounted in a detachable manner in the base body (30) and received in a respective intermediate space (104) between two splines (102).

6. Fitting adjustment device (22) according to any one of claims 4 to 5, comprising a reversible locking mechanism (38) of the internal adjusting member (34) relative to the external adjusting member (32) in the chosen angular position.

7. Device (22) according to claim 6, wherein the reversible locking mechanism (38) of the internal adjusting member (34) with respect to the external adjusting member (32) comprises a first indexing ring (110) of the internal adjusting member (34) with respect to the external adjusting member (32) extending around the internal position adjustment axis (B-B') on one of the internal adjusting member (34) and the external adjusting member (32), and at least one cooperation member with the first indexing ring (110), projecting towards the first indexing ring (110) from the other of the internal adjusting member (34) and the external adjusting member (32).

8. Fitting adjustment device (22) according to claim 7, wherein the reversible locking mechanism of the internal adjusting member (34) with respect to the external adjusting member (32) comprises a second indexing ring (112) extending around the internal position adjustment axis (B-B') on the other of the internal adjusting member (34) and the external adjusting member (32), the second indexing ring (112) comprising a plurality of cooperating members with the first indexing ring (110) projecting towards the second indexing ring (112).

9. Fitting adjustment device (22) according to any one of the preceding claims, comprising a system (40) for fixing the second part (20) on the internal adjustment member (34), the system (40) for fixing the second part (20) on the internal adjustment member (34) being offset with respect to the internal position adjustment axis (B-B').

10. Fitting adjustment device (22) according to claim 9, wherein the system (40) for fixing the second part (20) to the internal adjustment member (34) comprises a fixing housing (120) provided in the internal adjustment member (34) away from the internal position adjustment axis (B-B'), and a reversible fixing member (122) for the second part (20), configured to be reversibly fixed in the fixing housing (120).

11. Fitting adjustment device (22) according to any one of the preceding claims, wherein the base body (30) comprises a plate (50), the fitting adjustment device (22) comprising a reversible fixing system for the plate (50) on the first part (18).

12. Aircraft cabin (10), comprising a first part (18), a second part (20), and a device (22) according to any one of the preceding claims, connecting the first part (18) to the second part (20).

13. Aircraft cabin (10) according to claim 12, wherein the first part (18) is a first trim piece for the aircraft cabin (10), in particular a side trim piece for the aircraft cabin (10), the second part (20) being a second trim piece (20) for the aircraft cabin (10), in particular a window panel.

14. A method for mounting a first part (18) onto a second part (20) in an aircraft cabin (10), the method comprising the following steps: - supplying a mounting adjustment device (22) according to any one of the preceding claims, - fixing the base body (30) on the first part (18), - mounting the external adjusting member (32) on the base body (30) in an external angular position chosen from a plurality of predefined external angular positions around the external position adjustment axis (A-A'), - mounting the internal adjusting member (34) on the external adjusting member (32) in an internal angular position chosen from a plurality of predefined internal mounting angular positions around the internal position adjustment axis (B-B'), characterized by the placement of the internal adjusting member (34) in an elevation position chosen from a plurality of predefined elevation positions relative to the base body (30) along the internal position adjustment axis (B-B').

15. A method according to claim 14, wherein the external adjusting member (32) is mounted in the base body (30) via a helical linkage along the external position adjustment axis (A-A'), the placement of the internal adjusting member (34) in the chosen elevation position relative to the base body (30) comprising the rotational drive of the external adjusting member (32) relative to the base body (30) around the external position adjustment axis (A-A') via the helical linkage and / or wherein the internal adjusting member (34) is mounted in the external adjusting member (32) via a helical linkage along the internal position adjustment axis (B-B'),the placement of the internal adjustment member (34) in the chosen elevation position relative to the base body (30) including the rotational drive of the internal adjustment member (34) relative to the external adjustment member (32) around the internal position adjustment axis (B-B') via the helical linkage.

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