MECHANISM FOR POSITIONING A MOVABLE PART RELATIVE TO A SUPPORT, BETWEEN A DEPLOYED POSITION WHERE THE MOVABLE PART IS AT A DISTANCE FROM THE SUPPORT AND A RETRACTED CONFIGURATION WHERE THE MOVABLE PART IS LOCATED FLUSH WITH THE SUPPORT, AND SEAFARING VEHICLE INCLUDING SUCH A MECHANISM

Abstract

A mechanism positions a movable part relative to a support, between deployed and retracted configurations, with the movable part distant from the support and flush with the support, respectively. A base is attached to the support and has a central hole. A first positioning device has a first body in the central hole and a first off-centered hole relative to the central hole and a first notched wheel mechanically attached to the first body. A second positioning device has a second body in the first off-centered hole and a second off-centered hole and with a second notched wheel attached to the second body rotating when the second notched wheel is actuated. The two positioning devices are mounted fixed in translation relative to the base and position, along the two directions, an interface member of the movable part mounted in the second off-centered hole and attached to the positioning mechanism.

Description

Mechanism for positioning a movable part relative to a support, between a deployed position where the movable part is at a distance from the support and a retracted configuration where the movable part is located flush with the support, and seafaring vehicle including such a mechanism

TECHNICAL FIELD OF THE INVENTION

The invention relates to the adjustment in position, along several directions, of a movable part with respect to a support.

In particular, the invention relates to a mechanism for positioning a movable part relative to a support, between a deployed position where the movable part is at a distance from the support and a retracted configuration where the movable part is located flush with the support.

The invention also relates to a seafaring vehicle, such as a vessel, including such a positioning mechanism

It may consist for example of a bulwark that is movable with respect to a hull of the seafaring vehicle.

Seafaring vehicle is understood here to mean a boat or a vessel which allows the maritime transport of materials and/or people. It may consist of any type of boat, particularly a pleasure, fishing, commercial boat, etc., whether it is a motor and/or sail boat.

PRIOR ART

In the maritime field, some vessels include a hull and a bulwark which can be movable relative to the hull, between a deployed configuration wherein the bulwark is at a distance from the hull and a retracted configuration wherein the bulwark is flush with the hull.

For example, the European patent EP 3 290 326 B1 discloses a movable bulwark coupled by a mechanical hinge system to the hull of a boat.

Such a mechanical hinge system can take on play in use, especially given that a bulwark is a relatively heavy part. This mechanical hinge system, which requires an adjustment at the assembly thereof, must generally be disassembled then replaced or re-adjusted by a maintenance operation.

DISCLOSURE OF THE INVENTION

The invention relates to a mechanism for positioning a movable part relative to a support, which is particularly reliable and convenient to use.

The invention thus relates, in a first aspect, to a mechanism for positioning a movable part relative to a support, between a deployed position where the movable part is at a distance from the support and a retracted configuration where the movable part is located flush with the support, including:

• • a base mechanically attached in a fixed manner to the support and having a central hole;
  • a first positioning device provided with a first body mounted in the central hole of the base and having a first off-centered hole relative to the central hole, and with a first notched wheel mechanically attached to the first body and configured to rotate the first body relative to the base when the first notched wheel is actuated;
  • a second positioning device provided with a second body mounted in the first off-centered hole of the first positioning device and having a second off-centered hole relative to the central hole and non-concentric with the first off-centered hole, and with a second notched wheel mechanically attached to the second body and configured to rotate the second body when the second notched wheel is actuated;
  • with the first positioning device and the second positioning device which are mounted fixed in translation relative to the base and which are configured to position, along a first direction and along a second direction different from the first direction, an interface member of the movable part which is mounted in the second off-centered hole of the second body of the second positioning device and which is mechanically attached to the positioning mechanism.

In the mechanism according to the invention, the first positioning device and the second positioning device are each of the so-called eccentric type.

The mechanism according to the invention thus offers the option of adjusting along two separate directions the movable part in position relative to the support, so as to make it possible, in the retracted configuration, to place the movable part flush with the support and, in the deployed configuration, to place the movable part at a distance from the support.

The mechanism according to the invention has the advantage of enabling an easier adjustment by merely actuating the first notched wheel and/or the second notched wheel, so as to position the first positioning device and along the second direction via the second positioning device.

Preferred, simple, convenient and economical features of the bearing according to the invention are described hereinafter.

The first positioning device is provided with recesses arranged in the first body and with clamping jaws movably mounted in the recesses.

The clamping jaws are configured to lock the second body of the second positioning device in position.

The first positioning device is provided with a clamping collar mounted around the jaws and the first body and configured to hold the jaws in the respective recesses.

The mechanism includes a cover which has a central orifice and which is mechanically attached to the base, with the central orifice which is located facing the central hole of the base, the first body of the first positioning device is rotatably mounted between the cover and the first body whereas the cover is at least partially sandwiched between the first notched wheel and the first body.

The second body of the second positioning device passes through the central orifice of the cover and the first notched wheel of the first positioning device is located between the cover and the second notched wheel of the second positioning device.

The base includes a main body which is provided with a curved elastic member arranged in the central hole, a radially through orifice of the main body, and a locking member at least partially inserted into the through orifice and configured to stress the curved elastic member.

The curved elastic member is configured to lock the first body of the first positioning device in position.

The curved elastic member is formed by a lug integral with the main body.

The base includes a sole plate mechanically attached to the support and the main body is mechanically attached to the sole plate.

The base is formed from one piece.

The mechanism includes a first operating key configured to allow the rotation of the first notched wheel of the first positioning device and a second operating key configured to allow the rotation of the second notched wheel of the second positioning device.

The invention also relates, in a second aspect, to a seafaring vehicle, including a positioning mechanism as described above and which is configured to adjust a movable part of the seafaring vehicle in position relative to a support of the seafaring vehicle, between a deployed position where the movable part is at a distance from the support and a retracted configuration where the movable part is located flush with the support.

Seafaring vehicle is understood here to mean a boat or a vessel which allows the maritime transport of materials and/or people. It may consist of any type of boat, particularly a pleasure, fishing, commercial boat, etc., whether it is a motor or sail boat.

In particular, the movable part can be a movable bulwark of the seafaring vehicle and the support can be a hull of the seafaring vehicle.

Such an application makes it possible to create, in an open position of the bulwark, an additional surface for a user of the seafaring vehicle, while in a closed position of the bulwark, the latter is stored flush with the hull.

The mechanism according to the invention makes it possible to position the bulwark perfectly flush with the hull in the closed position thereof, and adjustment is easier.

Between the retracted position and the deployed position, or respectively the open position and the closed position of the bulwark, the latter is coupled around an interface member of the bulwark mounted in the second off-centered hole of the second body of the second positioning device.

The mechanism is mechanically attached by the base to the hull of the boat and the bulwark is provided with a hinge axis about which it pivots, said hinge axis being inserted into the interface member.

The interface member includes a support flange mounted on the mechanism and a ball joint attached to the support flange and which receives the hinge axis.

BRIEF DESCRIPTION OF THE FIGURES

The disclosure of the invention will now continue with the description of an exemplary embodiment, given hereinafter as an illustration and that is not limiting, with reference to the appended drawings.

FIG. 1 is a perspective view of a seafaring vehicle, such as a vessel or boat, which includes a hull and a bulwark in a closed position, in the retracted configuration and flush with the hull.

FIG. 2 is a similar view to that of FIG. 1 showing the bulwark in an open position, in the deployed configuration.

FIG. 3 is a similar view to that of FIG. 1 but representing very schematically the seafaring vehicle having a mechanism for positioning the bulwark, here in the closed position.

FIG. 4 is a similar view to that of FIG. 3 showing the bulwark in the open position thereof.

FIG. 5 is a plane view of a sole plate of a base of the mechanism for positioning the bulwark.

FIG. 6 is a plane view of a main body of the base of the positioning mechanism.

FIG. 7 is a center cross-sectional view of the base formed of the sole plate thereof and the main body thereof.

FIG. 8 is a plane view of a first body of a first positioning device of the positioning mechanism.

FIG. 9 is a center cross-sectional view of the first body of the first positioning device.

FIG. 10 is a plane view of the first positioning device with clamping jaws and a collar mounted on the first body of the first positioning device.

FIG. 11 is a plane view of the assembly of FIG. 10 mounted on the base seen in FIG. 7.

FIG. 12 is a plane view of a cover of the positioning mechanism.

FIG. 13 is a center cross-sectional view of the assembly of FIG. 11 assembled with the cover of FIG. 12.

FIG. 14 is a plane view of a first notched wheel of the first positioning device, with a first operating key.

FIG. 15 is a similar view to that of FIG. 13, with in addition the first notched wheel mounted facing the lid.

FIG. 16 is a plane view of a second body of a second positioning device of the positioning mechanism.

FIG. 17 is a center cross-sectional view of the second body of the second positioning device.

FIG. 18 is a center cross-sectional view showing the second body of the second positioning device inserted in the assembly of FIG. 15.

FIG. 19 is a plane view of a second notched wheel of the second positioning device, with a second operating key.

FIG. 20 is a similar view to that of FIG. 18, with in addition the second notched wheel mounted on the second body of the second positioning device.

FIG. 21 is a similar view to that of FIG. 20, with in addition an interface member configured to support the bulwark and which is mounted on the positioning mechanism.

FIG. 22 is a partial plane view of the positioning mechanism showing it in a so-called neutral position.

FIG. 23 is a similar view to that of FIG. 22, with the first notched wheel and the second notched wheel which are rotated along a first predetermined angle.

FIG. 24 is a similar view to that of FIG. 23, with only the second notched wheel which is rotated along a second predetermined angle.

DETAILED DESCRIPTION

FIGS. 1 and 2 illustrate a seafaring vehicle 1, such as a vessel or boat, which includes a hull 2 and a bulwark 3 that is movable relative to the hull 2.

Seafaring vehicle is understood here to mean a boat or a vessel which allows the maritime transport of materials and/or people. It may consist of any type of boat, particularly a pleasure, fishing, commercial boat, etc., whether it is a motor and/or sail boat.

In FIG. 1, the bulwark 3 is in a closed position, in the retracted configuration and flush with the hull, whereas in FIG. 2, the bulwark 3 is in an open position, in the deployed configuration at a distance from the hull 2.

In the open position, the bulwark 3 forms an additional usable surface for the user of the seafaring vehicle 1.

In the closed position, the bulwark 3 must be perfectly flush with the hull 2 at least to ensure correct closure of the hull and thus protect the user, and also so that the hull lines are continuous.

The bulwark 3 is a relatively heavy movable part which requires a fine adjustment of the position thereof with respect to the hull 2, which forms a support.

FIGS. 3 and 4 schematically show the seafaring vehicle 1 with its bulwark 3 which is movable relative to the hull 2 about a hinge system 4.

The seafaring vehicle 1 is here furthermore provided with a positioning mechanism 5 of the bulwark 3 relative to the hull 2.

In these figures, the positioning mechanism 5 can be seen on only one side of the bulwark 3 but it can be disposed on either side of the bulwark.

The positioning mechanism 5 is of the double eccentric type and offers the possibility of adjusting in position along two separate directions the position of the bulwark 3 relative to the hull 2, in a particularly reliable and convenient manner.

The positioning mechanism 5 is described with reference successively to FIGS. 5 to 20.

In particular, with reference to FIGS. 5 to 7, the mechanism 5 includes a base 6 having here a sole plate 7 configured to be mechanically attached in a fixed manner to the hull 2 of the seafaring vehicle 1.

The sole plate 7 is of annular shape, has an outer diameter De1 and an inner diameter Di1 delimiting a first central hole 9, and includes several fastening orifices 10a and 10b opening through the sole plate 7.

The base 6 furthermore includes a main body 8 which is here configured to be mounted in direct contact and mechanically attached to the sole plate 7.

The main body 8 has here a semi-annular shape with an outer diameter De2 similar to that of the sole plate 7 and an inner diameter Di2 delimiting at least partially a second central hole 12 and which is greater than the inner diameter Di1 of the sole plate 7.

The main body 8 includes several fastening orifices 11a and 11b opening through the main body 8.

The main body 8 furthermore includes a curved elastic member 13 arranged on the side of the inner diameter Di2 and which extends into the central hole 12, a radially through orifice 14 of the main body 8, and a locking member 15 at least partially inserted into the through orifice 14 and configured to stress the curved elastic member 13.

When the locking member 15, for example formed by a screw, is moved against the curved elastic member 13, for example formed by a lug integral with the main body 8, this lug is deformed in the second central hole 12.

In the example illustrated, the main body 8 has a greater thickness than the sole plate 7.

Assembled, the sole plate 7 and the main body 8 form the base 6, with at least the fastening orifices 10a and 11a and certain fastening orifices 10b and 11b which are located facing one another.

The sole plate 7 and the main body 8 can be assembled for example by screw type fastening members 18 (seen in FIG. 11), passing through certain respective fastening orifices 10b and 11b.

With reference to FIGS. 8 to 15, the mechanism 5 includes a first positioning device 20 of the bulwark 3, along a first direction.

The first positioning device 20 is provided with a first body 21 having a first off-centered hole 22, with a first predetermined eccentricity value Ce1.

The first body 21 has an overall annular shape, with an outer diameter De3 and an inner diameter Di3 delimiting the first off-centered hole 22.

The first body 21 has a plurality of assembly orifices 23.

The first body 21 is configured to be mounted in the central hole of the base 6 formed by the first central hole 9 of the sole plate 7 and by the second central hole 12 of the main body 8.

In particular, the first body 21 has an overall cylindrical lateral wall 24 whereon protrusions 25 which form shoulders 26 resting on the sole plate 7 are arranged.

The first body 21 furthermore has an overall cylindrical inner wall 33 and an inner shoulder 34 at one end of this inner wall 33.

The first positioning device 20 is provided with recesses 27 arranged in the first body 21, between the assembly orifices 23, and with clamping jaws 28 freely, or even movably, mounted in the recesses 27.

The first positioning device 20 is provided with a clamping collar 29 mounted around the jaws 28 and the first body 21 and configured to hold the jaws 28 in the respective recesses 27.

For this purpose, the clamping collar 29 includes here two clamping tabs 30 facing one another and each having a through hole which receives a fastening member 31, such as a screw or bolt.

It will be noted that the outer diameter De3 plus the thickness of the clamping collar 29 is substantially equivalent to the inner diameter Di2 of the main body 8 of the base 6.

The mechanism 5, or the first positioning device 20 thereof, includes a cover 35 of overall annular shape which has an outer diameter De4 and an inner diameter Di4 delimiting a central orifice 36.

The outer diameter De4 and the inner diameter Di4 are respectively substantially equal to the outer and inner diameters De1 and Di1 of the sole plate 7.

The cover 35 is provided with centering orifices 37a and fastening orifices 37b.

The cover 35 is mechanically attached to the base 6, with the central orifice 36 which is located facing the central hole of the base 6 formed by the first central hole 9 of the sole plate 7 and the second central hole 12 of the main body 8.

The mechanism 5 can include fastening members, not shown, which pass through the centering orifices 37a and other fastening orifices 11b of the main body 8 of the sole plate 7, so as to center the cover 35 with respect to the base 7 and about the first body 21 of the first positioning device 20.

Furthermore, the mechanism 5 can include other fastening members 38, for example screw type, which pass through the fastening orifices 37b of the fastening orifices 10a and 11a respectively of the sole plate 7 and the main body 8 of the base 6, and which engage on the hull 2.

The first body 21 of the first positioning device 20 is thus rotatably mounted between the cover 35 and the base 6.

The first positioning device 20 is furthermore provided with a first notched wheel 40 mechanically attached to the first body 21 and configured to rotate the first body 21 relative to the base 6 when the first notched wheel is actuated.

The first notched wheel 40 is arranged such that the cover 35 is at least partially sandwiched between the first notched wheel 40 and the first body 21.

The first notched wheel 40 is of annular shape with a first off-centered orifice 41 of the same eccentricity value as the first off-centered hole 22 of the first body 21, assembly orifices 42 passing through the first notched wheel 40, an assembly notch 45 and a plurality of teeth 44 distributed on the outer perimeter thereof.

The first notched wheel 40 is mechanically attached, for example by screwing, to the first body 21, via fastening members passing through the respective assembly orifices 23 and 42.

The assembly notch 45 allows for its part access to the fastening members 38.

The mechanism 5 includes a first operating key 46 equipped with a gripping portion 47 and an actuation portion 48 which is here curved and which is configured to allow the rotation of the first notched wheel 40 of the first positioning device 20, thanks for example to a spigot 49 at the end of the actuation portion 48 which engages between two teeth of the first notched wheel 40.

In the mechanism thus assembled, it will be noted that the curved elastic member 13 of the main body 8 of the base 6 is configured to lock the first body 21 of the first positioning device 20 in position when the locking member 15 is actuated.

With reference to FIGS. 16 to 20, the mechanism 5 also includes a second positioning device 50 of the bulwark 3, along a second direction separate from the first direction.

The second positioning device 50 is provided with a second body 51 having a second off-centered hole 52, with a second predetermined eccentricity value Ce2 equal to or different from the first off-centered hole 22 of the first body 21 of the first positioning device 20.

The second body 51 has an overall cylindrical shape, with an outer diameter De5 and an inner diameter Di5 delimiting the second off-centered hole 52.

The second off-centered hole 52 has a bottom wall 54 wherein the through hole 53 which also opens outside the second body 51 opens.

The second body 51 here has two assembly orifices 55.

The second body 51 is configured to be mounted in the first off-centered hole 22 of the first body 21 of the first positioning device 20, with the second off-centered hole 52 which is non-concentric with the first off-centered hole 22, and in the

The second body 51 has a plurality of cylindrical lateral walls 56 to 59, of distinct diameters so as to form a plurality of shoulders 60 to 62, of which a first shoulder 60 formed between a first lateral wall 56 and a second lateral wall 57, a second shoulder 61 formed between the second lateral wall 57 and a third lateral wall 58, and a third shoulder 62 formed between the third lateral wall 58 and a fourth lateral wall 59, with the latter which is located opposite the first lateral wall 56.

The first lateral wall 56 is located on the side of the second body 51 where the through hole 53 opens whereas the fourth lateral wall 59 is located on the site of the second body 51 where the second off-centered hole 52 opens.

The second body 51 of the second positioning device 50 passes through the central orifice 36 of the cover 35 and the first off-centered orifice 41 of the first notched wheel 40.

In particular, in the example illustrated, the first lateral wall 56 and the second lateral wall 57 of the second body 51 come against the inner wall 33 of the first body 21, with the first shoulder 60 of the second body 51 which comes against the inner shoulder 34 of the first body 21.

The second lateral wall 57 of the second body 51 extends through the central orifice 36 of the cover 35 and the second shoulder 61 faces the first notched wheel 40.

The third lateral wall 58 extends through the first off-centered orifice 41 of the first notched wheel 40.

The second positioning device 50 is also provided with a second notched wheel 65 mechanically attached to the second body 51 and configured to rotate the second body 51 when the second notched wheel 65 is actuated.

The mechanism 5 is configured such that the first notched wheel 40 of the first positioning device 20 is located between the cover 35 and the second notched wheel 65 of the second positioning device 50.

In particular, the second notched wheel 65 is of annular shape with a second off-centered orifice 66 of the same eccentricity value as the second off-centered hole 52 of the second body 51, assembly orifices 67 passing through the second notched wheel 65 and a plurality of teeth 68 distributed on the outer perimeter thereof.

The second notched wheel 65 is mechanically attached, for example by screwing, to the second body 51, via fastening members passing through the respective assembly orifices 55 and 67.

In particular, the third shoulder 62 of the second body 51 faces the second notched wheel 65 and the fourth lateral wall 59 passes through the second off-centered orifice 66.

The second notched wheel 65 is therefore located overall facing the first notched wheel 40, which are readily accessible.

The mechanism 5 includes a second operating key 69 equipped with a gripping portion 70 and an actuation portion 71 which is here curved and which is configured to allow the rotation of the second notched wheel 65 of the second positioning device 50, thanks for example to a spigot 72 at the end of the actuation portion 71 which engages between two teeth of the second notched wheel 65.

In the mechanism 5 thus assembled, the first positioning device 20 and the second positioning device 50 are mounted fixed in translation relative to the base 6 and are configured to position, along the first direction and the second direction (see hereinafter), the bulwark 3 in a particularly fine manner.

It will be noted that the clamping jaws 28 are configured to lock the second body 51 of the second positioning device 50 in position.

With reference to FIG. 21, the hinge system 4 of the bulwark 3 is provided with an interface member 80 which is configured to be mounted in the second off-centered hole 52 of the second body 51 of the second positioning device 50 and is mechanically attached to the positioning mechanism 5.

In particular, the interface member 80 includes a support flange 81 inserted at least partially into the second off-centered hole 52 and having a fastening orifice 83 wherein a screw type fastening member 82 is inserted.

The fastening member 83 is inserted on the side of the base 6 of the mechanism whereas the support flange 81 projects at least partially from the side of the second notched wheel 65.

The interface member 80 furthermore includes a ball joint 84 engaged in the support flange 81 and which receives a hinge axis 85 of the bulwark 3 around which the latter can pivot.

In other words, the first positioning device 20 and the second positioning device 50 are configured to position the support flange 81 and hence the hinge axis 85 of the bulwark 3.

FIGS. 22 to 24 show an example of adjustment of this hinge axis 85 via the mechanism 5 and along the first and second adjustment directions.

The adjustment is performed preferably in the closed position of the bulwark 3, to place it perfectly flush with the hull 2.

FIG. 22 shows the mechanism 5 in a so-called “neutral dead center” position, where the first adjustment direction D1 and the second adjustment direction D2, an adjustment zone which corresponds here to the area of the second off-centered orifice 66 of the second notched wheel 65 of the second positioning device 50, and also adjustment marks R1, R2 and R3 respectively formed on the base 6, the first positioning device 20 and the second positioning device 50, with these marks R1-R3 which are aligned, are represented. The point P1 represents the nominal position of the second off-centered hole 52 of the second positioning device 50.

Relative to a desired position of the hinge axis 85 of the bulwark 3, in accordance with a predetermined scale, the first notched wheel 40 and/or the second notched wheel 65 must be rotated relative to the so-called “neutral dead center” position, using the first operating key 46 and/or the second operating key 69, respectively.

The rotation of the first notched wheel 40 and/or the second notched wheel 65 may have to be performed in the clockwise or anticlockwise direction.

In FIG. 23, the first notched wheel 40 and the second notched wheel 65 are rotated in the anticlockwise direction along a first determined angle α1. The marks R2 and R3 are moved whereas the mark R1 does not move.

In FIG. 24, only the second notched wheel 65 is rotated in the anticlockwise direction along a second determined angle α2. Only the mark R3 is therefore moved.

The rotation of the first notched wheel 40 and the second notched wheel 65 along the first determined angle α1 in the anticlockwise direction, followed by the rotation of only the second notched wheel 65 along the second determined angle α2 in the clockwise direction, makes it possible to offset the second off-centered hole 52 of the second positioning device 50 from the nominal position thereof to the desired position P2 of the hinge axis of the bulwark.

Obviously, according to the desired position P2, the values of the angles of rotation and/or the direction of rotation and/or the notched wheel to be rotated can change.

Once the mechanism 5 is in the desired position P2, the mechanism 5 is locked in position first by clamping the clamping collar 29 around the clamping jaws 28 to lock the second body 52 of the second positioning device 50 in position, then the locking member 15 is actuated against the curved elastic member 13 of the main body 8 of the base 6, which is deformed and which locks the first body 21 of the first positioning device 20 in position.

In the mechanism 5 described, the first positioning device 20 and the second positioning device 50 are each of the so-called eccentric type.

The mechanism 5 thus offers the option of adjusting along two separate directions the bulwark 3 in position relative to the hull 2 and more generally a movable part relative to a support, so as to make it possible, in the retracted configuration, to place the movable part flush with the support and, in the deployed configuration, to place the movable part at a distance from the support.

The mechanism 5 has the advantage of enabling an easier adjustment by merely actuating the first notched wheel 40 and/or the second notched wheel 65, so as to position the first positioning device 20 and along the second direction via the second positioning device 50.

Alternatives that are not illustrated are described hereinafter.

The thicknesses of the main body and the sole plate are identical or conversely the sole plate is thicker.

The base is formed from one piece rather than with a separate sole plate and main body.

The main body has an annular shape.

The first positioning device can include more or less recesses in the first body thereof and associated jaws.

The different elements of the mechanism include more or less assembly, centering and/or fastening orifices.

The different elements of the mechanism can be made of metal or plastic or of composite material.

More generally, the invention is not limited to the examples described and shown.

Claims

1. Mechanism for positioning a movable part relative to a support, between a deployed position where the movable part is at a distance from the support and a retracted configuration where the movable part is located flush with the support, including: a base mechanically attached in a fixed manner to the support and having a central hole;a first positioning device, provided with a first body mounted in the central hole of the base and having a first off-centered hole relative to the central hole, and with a first notched wheel mechanically attached to the first body and configured to rotate the first body relative to the base when the first notched wheel is actuated;a second positioning device, provided with a second body mounted in the first off centered hole of the first positioning device and having a second off-centered hole relative to the central hole and non-concentric with the first off-centered hole, and with a second notched wheel mechanically attached to the second body and configured to rotate the second body when the second notched wheel is actuated;with the first positioning device and the second positioning device which are mounted fixed in translation relative to the base and which are configured to position, along a first direction and along a second direction different from the first direction, an interface member of the movable part which is mounted in the second off-centered hole of the second body of the second positioning device and which is mechanically attached to the positioning mechanism.

2. The mechanism according to claim 1, wherein the first positioning device is provided with recesses arranged in the first body and with clamping jaws movably mounted in the recesses.

3. The mechanism according to claim 2, wherein the clamping jaws are configured to lock the second body of the second positioning device in position.

4. The mechanism according to claim 2, wherein the first positioning device is provided with a clamping collar mounted around the jaws and the first body and configured to hold the clamping jaws in the respective recesses.

5. The mechanism according to claim 1, wherein the mechanism includes a cover which has a central orifice and which is mechanically attached to the base, with the central orifice which is located facing the central hole of the base, the first body of the first positioning device is rotatably mounted between the cover and the first body whereas the cover is at least partially sandwiched between the first notched wheel and the first body.

6. The mechanism according to claim 5, wherein the second body of the second positioning device passes through the central orifice of the cover and the first notched wheel of the first positioning device is located between the cover and the second notched wheel of the second positioning device.

7. The mechanism according to claim 1, wherein the base includes a main body which is provided with a curved elastic member arranged in the central hole, a radially through orifice of the main body, and a locking member at least partially inserted into the through orifice and configured to stress the curved elastic member.

8. The mechanism according to claim 7, wherein the curved elastic member is configured to lock the first body of the first positioning device in position.

9. The mechanism according to claim 7, wherein the curved elastic member is formed by a lug integral with the main body.

10. The mechanism according to claim 7, wherein the base includes a sole plate mechanically attached to the support and the main body is mechanically attached to the sole plate.

11. The mechanism according to claim 7, wherein the base of formed from one piece.

12. The mechanism according to claim 1, wherein the mechanism includes a first operating key configured to allow the rotation of the first notched wheel of the first positioning device and a second operating key configured to allow the rotation of the second notched wheel of the second positioning device.

13. Seafaring vehicle, including a positioning mechanism according to claim 1 and which is configured to adjust a movable part of the seafaring vehicle in position relative to a support of the seafaring vehicle, between a deployed position where the movable part is at a distance from the support and a retracted configuration where the movable part is located flush with the support.

14. The vehicle according to claim 13, wherein the movable part is a movable bulwark of the seafaring vehicle and the support is a hull of the seafaring vehicle.

15. The vehicle according to claim 14, wherein between the retracted position and the deployed position, or respectively the open position and the closed position of the bulwark, the bulwark is coupled around an interface member of the bulwark mounted in the second off-centered hole of the second body of the second positioning device.

16. The vehicle according to claim 14, wherein the mechanism is mechanically attached by the base to the hull of the seafaring vehicle and the bulwark is provided with a hinge axis about which the bulwark pivots, said hinge axis being inserted into the interface member.

17. The vehicle according to claim 16, wherein the interface member includes a support flange mounted on the mechanism and a ball joint attached to the support flange and which receives the hinge axis.

18. The mechanism according to claim 2, wherein the mechanism includes a cover which has a central orifice and which is mechanically attached to the base, with the central orifice which is located facing the central hole of the base, the first body of the first positioning device is rotatably mounted between the cover and the first body whereas the cover is at least partially sandwiched between the first notched wheel and the first body.

19. The mechanism according to claim 18, wherein the second body of the second positioning device passes through the central orifice of the cover and the first notched wheel of the first positioning device is located between the cover and the second notched wheel of the second positioning device.

20. The mechanism according to claim 19, wherein the base includes a main body which is provided with a curved elastic member arranged in the central hole, a radially through orifice of the main body, and a locking member at least partially inserted into the through orifice and configured to stress the curved elastic member.