Handling Apparatus and Method

Abstract

A handling apparatus (10) for supporting and deploying an object (12), such as a marine craft, comprises a support frame (18) and a cradle (20) upon which the object (12) to be deployed is disposed. A retaining flap (24) forms a first portion of the cradle (20) and is coupled to a deployment ramp (26) which forms a second portion of the cradle (20), the retaining flap (24) being movable between a first position which retains the object (12) on the cradle (20) and a second position in which the object (12) is released for movement relative to the cradle (20). The handling apparatus (10) is movable from a first, storage, position to a second, deployment, position in which the object (12) can be deployed.

Claims

1. A handling apparatus for supporting and deploying an object, the handling apparatus operable between a first, storage, position and a second, deployment, position for deploying the object, the handling apparatus comprising: a cradle for supporting the object to be deployed thereon, the cradle comprising a first cradle portion coupled to a second cradle portion, the first cradle portion movable from a first, extended, position relative to the second cradle portion in which the object is retained on the cradle by the first cradle portion to a second, retracted, position in which the object is released for movement relative to the cradle; and a release arrangement operable to release the object for movement relative to the cradle, the release arrangement configured to move or permit movement of the first cradle portion to the second, retracted, position, wherein the handling apparatus releasably retains the object and is configured, to move from the first, storage, position to the second, deployment, position to facilitate deployment of the object when the first cradle portion moves to the second, retracted, position.

2. The handling apparatus of claim 1, wherein the handling apparatus comprises a davit.

3. The handling apparatus of claim 1, wherein the handling apparatus is configured to move from the first, storage, position to the second, deployment, position as a result of movement of the object to be deployed.

4. The handling apparatus of claim 1, wherein the first cradle portion is pivotably coupled to the second cradle portion and the first cradle portion is pivotable from the first, extended, position to the second, retracted, position.

5. The handling apparatus of claim 1, wherein the first cradle portion comprises a retaining flap.

6. The handling apparatus of claim 1, wherein the second cradle portion comprises a deployment ramp.

7. The handling apparatus of claim 1, wherein the handling apparatus comprises a support arrangement, the support arrangement comprising a support frame.

8. The handling apparatus of claim 7, wherein the support frame is pivotably coupled to a mounting surface, the handling apparatus movable from the first, storage, position to the second, deployment, position by pivoting the support frame.

9. The handling apparatus of claim 7, wherein the cradle is disposed on the support frame of the support arrangement.

10. The handling apparatus of claim 7, wherein the cradle is integrally formed with the support frame.

11. The handling apparatus of claim 7, wherein the support frame is at least partially constructed from a composite material.

12. The handling apparatus of claim 1, wherein the release arrangement is manually operable.

13. The handling apparatus of claim 1, wherein the release arrangement in a first configuration is configured to prevent movement of the first cradle portion relative to the second cradle portion and wherein the release arrangement in a second configuration is configured to permit movement of the first cradle portion relative to the second cradle portion.

14. The handling apparatus of claim 1, wherein the release arrangement comprises a sleeve configured for movement from a first position in which movement of the first cradle portion is prevented to a second position in which the first cradle portion is released for movement relative to the second cradle portion.

15. The handling apparatus of claim 1, wherein the handling apparatus comprises, or is operated associated with, a deployment arrangement.

16. The handling apparatus of claim 15, wherein the deployment arrangement comprises a winch arrangement.

17. The handling apparatus of claim 1, comprising an actuator arrangement.

18. A method comprising: providing a handling apparatus comprising: a cradle for supporting an object to be deployed thereon, the cradle comprising a first cradle portion coupled to a second cradle portion; and a release arrangement operable to release the object for movement relative to the cradle; operating the release arrangement by moving the first cradle portion from a first, extended, position relative to the second cradle portion to a second, retracted, position relative to the second cradle portion, in which second position the object is released for movement relative to the cradle; and moving the handling apparatus between a first, storage, position and a second, deployment, position suitable for deploying the object.

19. The method of claim 18, comprising deploying the object.

20. The method of claim 18, comprising operating a deployment arrangement to move the object.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0063] These and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0064] FIG. 1 shows a perspective view of a handling apparatus according to an embodiment of the present invention, showing the apparatus supporting an object;

[0065] FIG. 2 shows a perspective view of the handling apparatus shown in FIG. 1, with the object omitted for clarity;

[0066] FIG. 3 shows an enlarged perspective view of part of the handling apparatus shown in FIGS. 1 and 2, showing the release arrangement in a first position;

[0067] FIG. 4 shows an enlarged perspective view of part of the handling apparatus shown in FIGS. 1 and 2, with the release arrangement in the second position;

[0068] FIG. 5 shows an embodiment of the release arrangement shown in FIGS. 3 and 4;

[0069] FIG. 6 shows a cross-sectional view of the release arrangement shown in FIG. 5;

[0070] FIG. 7 shows an another cross-sectional view of the release arrangement shown in FIGS. 5 and 6;

[0071] FIG. 8 shows a perspective view of the handling apparatus shown in FIGS. 1 to 7, in a first, storage, position;

[0072] FIG. 9 shows an enlarged perspective view of part of the handling apparatus shown in FIG. 8, with the cradle in the first position;

[0073] FIG. 10 shows a perspective view of the handling apparatus shown in FIGS. 1 to 9 in a second, deployment, position;

[0074] FIG. 11 shows an enlarged perspective view of part of the handling apparatus shown in FIG. 10, with the cradle in the second position;

[0075] FIG. 12 shows a perspective view of a handling apparatus according to an alternative embodiment of the present invention;

[0076] FIG. 13 shows an enlarged view of part of the handling apparatus shown in FIG. 12, showing the release arrangement;

[0077] FIG. 14 shows a release arrangement according to another embodiment of the present invention, with the release arrangement in a first position; and

[0078] FIG. 15 shows the release arrangement shown in FIG. 14, with the release arrangement in a second position.

DETAILED DESCRIPTION

[0079] Referring first to FIGS. 1 and 2 of the accompanying drawings, there is shown a handling apparatus in the form of a davit 10 according to an embodiment of the present invention. In FIG. 1, an object 12 in the form of a lifeboat is shown, while in FIG. 2 the object 12 is omitted for clarity. In use, the davit 10 supports the object 12 and is movable from a first, storage, position in which the object 12 is stowed on the davit 10 to a second, deployment, position in which the object 12 can be deployed.

[0080] As will be described further below, the davit 10 releasably retains the object 12 and is configured so that, once released, the davit 10 moves from the first, storage, position to the second, deployment, position to facilitate deployment of the object 12.

[0081] In the illustrated embodiment, the davit 10 is mounted to the deck 14 of a marine craft 16 and the object 12 to be deployed is a daughter craft, such as a lifeboat, rigid inflatable boat (RIB) or the like. A davit 10 according to embodiments of the present invention is particularly beneficial for use in safety critical systems, such as deployment of lifeboats However, it will be recognised that the davit 10 may be mounted on any structure, including for example but not exclusively a floating platform, a dock or other land-based structure or the like and the object 12 may comprise any object suitable for deployment.

[0082] As shown in FIG. 2, the davit 10 comprises a support frame 18 and a cradle 20 upon which the object 12 to be deployed is disposed. In use, the support frame 18 supports the cradle 20 and defines a loading arm for a winch arrangement 22 used to deploy the object 12 from the davit 10 when in the deployment position, the winch arrangement 22 forming a deployment arrangement of the davit 10.

[0083] A retaining flap 24 forms a first portion of the cradle 20 and is pivotably coupled to a deployment ramp 26 which forms a second portion of the cradle 20. In the illustrated embodiment, the deployment ramp 26 does not form a continuous planar ramp surface but rather comprises a rectangular framework. Beneficially, the framework reduces the mass of the structure.

[0084] As shown more clearly in later Figures, the retaining flap 24 is pivotably coupled to the deployment ramp 26 via an axle 28 and, in use, the retaining flap 24 is pivotable between a first position which retains the object 12 on the cradle 20 (as shown in FIG. 2) and a second position in which the object 12 is released for movement relative to the cradle 20 (as shown in FIG. 3).

[0085] In the illustrated embodiment, the retaining flap 24 comprises a rectangular plate. However, in other embodiments the retaining flap 24 may take other forms, such a framework.

[0086] The deployment ramp 26 of the cradle 20 is mounted to the support frame 18 via legs 30. As shown, the legs 30 have varying length, the lengths of the legs 30 progressively increasing from a first, proximal, end of the cradle 20 to a second, distal, end of the cradle 20. The deployment ramp 26 thus defines a ramp angle A with respect to the support frame 18.

[0087] As shown in FIG. 2, the support frame 18 is secured to the deck 14 via anchor plates 32, the support frame 18 being pivotable about axle 34 to move the davit 10 from the first, storage, position to the second, deployed, position.

[0088] Two linear actuators 36 are disposed between the support frame 18 and the deck 14. In the illustrated embodiment, the actuators 36 comprise hydraulic actuators. However, the actuators 36 may alternatively comprise electric actuators, pneumatic actuators, mechanical actuators such as a screw jacks or the like.

[0089] In use, and in conditions where power is available to the actuators 36, the winch arrangement 22 is utilised to lift the object 12 from the cradle 20 and the actuators 36 are operable to move the davit 10 from the first, storage, position to the second, deployment, position to facilitate deployment of the object 12. However, in conditions where power is not available to the actuators 36, the davit 10 remains operational between the first and second positions, since the davit 10 can move between the first and second positions, where required, by pivoting the retaining flap 24 between its first, retaining, position and its second position in which the object 12 is released for movement relative to the cradle 20. In either scenario, the actuators 36 may also provide the additional functions of controlling the rate of deployment of the davit 10 between the first and second positions and thus acting as a damper, and/or limiting the extent of travel of the davit 10.

[0090] As shown in FIG. 2, the support frame 18 is modular in construction and comprises a number of beams 38 and nodes 40. A pulley wheel 42 is also provided for guiding the winch arrangement 22. The support frame 18 may be constructed from any suitable material. In the illustrated embodiment the beams 38 are constructed from a GRP composite material and the nodes 40 are constructed from stainless steel. Beneficially, providing the beams 38 from a composite material reduces weight of the davit 10 while providing the required strength to support and manipulate the load forces exerted on the support frame 18 in use.

[0091] As described above, and referring now also to FIGS. 3 to 7 of the accompanying drawings, the davit 10 releasably retains the object 12 and is configured so that, once released, the davit 10 moves from the first, storage, position to the second, deployment, position to facilitate deployment of the object 12.

[0092] FIGS. 3 and 4 show a release arrangement 44 for use in the davit 10 shown in FIGS. 1 and 2. FIG. 3 shows the release arrangement 44 in a first configuration in which the retaining flap 24 is locked in the first, extended, position to retain the object 12 relative to the cradle 12. FIG. 4 shows the release arrangement 44 in a second configuration in which the retaining flap 24 defines the second, retracted, position relative to the deployment ramp 26, such that the object 12 is permitted to move relative to the deployment ramp 26.

[0093] The release arrangement 44 is secured to the support frame 18 via an L-shaped bracket 46. In the illustrated embodiment, the release arrangement 44 comprises a hollow mandrel 48, a first end portion 50 of the mandrel 48 defining a flange 52 for securing the release arrangement 44 to the bracket 46 and a second end portion 54 of the mandrel 48 comprising a number of circumferentially spaced bores 56 for receiving locking dogs 58which in the illustrated embodiment take the form of balls. As shown in FIG. 12, the locking dogs 58 extend through the bores 56 and into pockets 60 formed in an end portion 62 of the axle 28. A sleeve 64 is disposed around the mandrel 48, an inner surface 66 of the sleeve 64 defining recesses 68. The sleeve 64 is initially biased towards an extended position (relative to the flange 52) by a spring 70. In this position, the locking dogs 58 are disposed in the pockets 60 and so are retained in a radially retracted configuration by the sleeve 64. In use, axial movement of the sleeve 64 towards a retracted position (towards the flange 52) aligns the recesses 68 with the dogs 58, permitting the dogs 58 to move radially outwards from the pockets 60, thereby releasing the axle 28 and the retaining flap 24 for rotational movement.

[0094] As described above, in conditions where power is available to the actuators 36, the winch arrangement 22 is utilised to lift the object 12 from the cradle 20 and the actuators 36 are operable to move the davit 10 from the first, storage, position to the second, deployment, position to facilitate deployment of the object 12. However, in conditions where power is not available the davit 10 remains operational since the release arrangement 44 can be initiated manually by pushing sleeve 64 towards flange 52. In some embodiments, a handle or lever (not shown) may be provided to effect movement of the sleeve 64. However, in the illustrated embodiment, a handle or lever is not required.

[0095] Operation of the davit 10 will now be described with reference in particular to FIGS. 8 to 11. The davit 10 initially defines the first, storage, position shown in FIG. 8. In this position, the support frame 18 is oriented in its first position and the retaining flap 24 is positioned in its first, extended, position relative to the deployment ramp 26. During normal operational conditions, the davit 10 is operable in a first mode which uses the marine craft's power and control systems to lift the object 12 from the cradle 20 using the winch arrangement 22 and to move the davit 10 from the first, storage, position to the second, deployment, position using the actuators 36. In the event of loss of power, the davit 10 is operable in a second mode. In this second mode, manual initiation of the release arrangement 44 moves the retaining flap 24 from the first, extended, position to the second, retracted, position. The winch arrangement 22 then manually lowers the object 12 a small distance, which alters the loading on the frame support 18 and causes it to pivot to the deployment position. The winch arrangement 22 is then operable manually to deploy the object 12.

[0096] It should be understood that the embodiment described herein is merely exemplary and that various modifications may be made thereto without departing from the scope of the invention.

[0097] For example, FIGS. 12 and 13 show a release arrangement 44 according to an alternative embodiment of the present invention. In this embodiment, the release arrangement 44 comprises a first, drive, gear 72 coupled to a handle 74 and a second, driven, gear 76 coupled to the axle 28.

[0098] Another alternative release arrangement 44 is shown in FIGS. 14 and 15. In this embodiment, a pinned bar 78 is coupled to the axle 28. The pinned bar 78 is initially retained by a release member 80. However, movement of the release member 80 releases the pinned bar 78 for rotation.