EP0153248B1 - Ship's davit for launching and supporting an object, e.g. a lifeboat - Google Patents

Ship's davit for launching and supporting an object, e.g. a lifeboat Download PDF

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Publication number
EP0153248B1
EP0153248B1 EP85400274A EP85400274A EP0153248B1 EP 0153248 B1 EP0153248 B1 EP 0153248B1 EP 85400274 A EP85400274 A EP 85400274A EP 85400274 A EP85400274 A EP 85400274A EP 0153248 B1 EP0153248 B1 EP 0153248B1
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EP
European Patent Office
Prior art keywords
platform
ship
pivoting
arms
hinged
Prior art date
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Expired
Application number
EP85400274A
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German (de)
French (fr)
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EP0153248A1 (en
Inventor
Alain Zoonens
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/30—Devices for guiding boats to water surface
    • B63B23/32—Rigid guides, e.g. having arms pivoted near waterline

Definitions

  • the invention relates to a davit device for boats, in particular for launching and maintaining an object such as a lifeboat or annex, of the type described in the preamble to the main claim.
  • This known device has two major drawbacks.
  • the control system of the support arm must be relatively complex in that it must not only ensure the horizontal maintenance of the platform, but must also ensure a displacement of the platform in an inclined position, which also involves an appropriate conformation of the upper wall of the rear part of the boat.
  • the prior art is content with a general remark according to which the displacement of the platform could be effected hydraulically, without however describing the means necessary for this purpose.
  • the other major drawback lies in the fact that the platform in its storage position occupies a rear part of the deck of the boat, which is as much useful space lost. Of course, by keeping the platform in its elevated position of rest on the deck of the boat, it can be kept fixed on the boat and thus meet any safety requirement.
  • the present invention aims to provide a davit device which does not have the drawbacks which have just been stated of the known device.
  • Figure 1 is a side view of a davit device according to the invention, showing this device in its two extreme positions.
  • Figure 2 is a view in the direction of arrow 11 in Figure 1, of the davit device according to the invention.
  • Figure 3 is a view towards arrow 111 of Figure 2, partially broken away.
  • a davit device 1 is mounted on the rear part of a boat 2.
  • the davit device 1 essentially comprises a platform 3 and two pivoting arms 4 for supporting the platform, control means 5 of the pivoting movement of the arms 4 and means 6 adapted to ensure the horizontal orientation of the platform 1, independently of the angular position of the support arms 4.
  • the arms 4 each pivot in a vertical plane.
  • Each support arm 4 of the platform 1 is articulated at 7 to the exterior lower part of the boat 2, above its waterline, preferably at the transom 8 of the latter.
  • the free upper end of each arm 4 is articulated at 10 to the lower structure of the platform 1.
  • the articulation points 10 of the arms 4 to the platform 1 are located substantially in the middle of the platform, symmetrically with respect to the longitudinal axis of the boat.
  • the davit device is adapted so that the platform 1 is movable in translation between an extreme high position a above the water level 11 and an extreme low position b below level 11, while being kept in a horizontal position.
  • the support arms 4 are bent appropriately so that their upper parts articulated at 10 to the platform extend vertically and horizontally along that the platform is respectively in its raised position a or its lower position b.
  • the control means 5 for pivoting the arms 4 can be made in any suitable manner, but are advantageously formed by a hydraulic cylinder articulated at one end at 12 to the transom 8 of the boat and by its other end, at 13, to a bar transverse 14 forming a spacer and extending between the two arms 4.
  • the means 6 for holding the platform 1 in a horizontal position are formed by a servo-motor such as for example a hydraulic jack articulated by its body at 15 to the lower structure of the platform and by the end of its piston rod, at 16, to a transverse bar 17 connecting the two arms 4.
  • the hydraulic cylinder 5 for controlling the pivoting of the arms 4 and the hydraulic cylinder 6 for maintaining the horizontal position of the platform 1 are preferably automatically coordinated so as to constantly ensure the horizontal position of the platform.
  • the platform 1 has a shape and a size suitable for receiving a cradle 18 adaptable to any type of annex object, such as a lifeboat 20 illustrated in the figure, schematically in phantom lines.
  • the shape and size of the pivoting arms 4 are such that, in its extreme low position b, the platform is submerged to a depth sufficient to allow the launching and floating of the boat 20 as well as the setting on the cradle 18 of a floating boat 20.
  • the platform 1 In its extreme high position a, the platform 1 is located at a level higher than the level of the freeboard of the boat.
  • Two safety fastening devices 21, on either side of the longitudinal axis of the boat 2 can be provided to make the platform removably integral with the structure adjacent to the boat, when it is in its extreme position high a.
  • Each of the safety fastening devices 21 can be constituted for example by a yoke and tenon system respectively secured to the boat and the platform or vice versa and can be coupled by a locking pin.
  • the platform can be equipped with a remote control of the control means 5, 6 as well as a light signaling of its state and / or of its operation.
  • the invention has in particular the great advantage of allowing the navigation of a boat on the high seas in complete safety with regard to the annexed boat arranged in stern and also of being able to completely turn over the boat on its cradle during wintering or large crossing to prevent it from filling with rain or sea water.
  • the platform can also be used as a bathing and solarium platform as well as for other various uses, for example as a means of lifting or lifting or the like.
  • the platform can be located anywhere on a boat.
  • the support arms could be articulated to the platform, at its lateral sides and / or at its side adjacent to the boat. A single support arm could be sufficient for the support of the platform.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Jib Cranes (AREA)
  • Emergency Lowering Means (AREA)
  • Toys (AREA)
  • Ladders (AREA)

Description

L'invention concerne un dispositif bossoir pour bateaux, notamment pour la mise à l'eau et le maintien d'un objet tel qu'une embarcation de sauvetage ou annexe, du type décrit dans le préambule de la revendication principale.The invention relates to a davit device for boats, in particular for launching and maintaining an object such as a lifeboat or annex, of the type described in the preamble to the main claim.

Un dispositif de ce type est décrit dans le document «Schiff & Hafen/Kommandobrücke», vol. 35. N° 8, août 1985, pages 75, 76, Vetersen, DE; W. Stecher: «Überleben in Seenot - eine neuartige Aus- und Einsetzvorrichtung für Rettungsboote». Selon cette antériorité, dans sa position de stockage, la plate-forme se trouve sur la partie arrière du bateau. Pendant son déplacement entre sa position basse et sa position élevée de stockage, la plate-forme n'est maintenue en position horizontale que sur une partie de son parcours. En effet, la plate-forme effectue tout d'abord, lorsqu'elle amenée de sa position basse vers sa position élevée, une partie de trajet au cours duquel elle est maintenue en position horizontale. Ensuite, en prenant appui par un galet sur une partie inclinée du bord du navire, la plate-forme est inclinée pour pouvoir ensuit être amenée par son bras de support dans sa position horizontale de stockage sur la partie arrière du bateau.A device of this type is described in the document "Schiff & Hafen / Kommandobrücke", vol. 35. No. 8, August 1985, pages 75, 76, Vetersen, DE; W. Stecher: "Überleben in Seenot - eine neuartige Aus- und Einsetzvorrichtung für Rettungsboote". According to this prior art, in its storage position, the platform is on the rear part of the boat. During its movement between its low position and its high storage position, the platform is only held in the horizontal position for part of its journey. Indeed, the platform first of all, when it is brought from its low position to its high position, a part of the path during which it is kept in the horizontal position. Then, by bearing by a roller on an inclined part of the edge of the ship, the platform is inclined so that it can then be brought by its support arm into its horizontal storage position on the rear part of the boat.

Ce dispositif connu présente deux inconvénients majeurs. Le système de commande du bras de support doit être relativement complexe dans la mesure où il ne doit pas seulement assurer le maintien horizontale de la plate-forme, mais doit assurer également un déplacement de la plate-forme en position inclinée, ce qui implique aussi une conformation appropriée de la paroi supérieure de la partie arrière du bateau. Or l'antériorité se contente d'une remarque générale selon laquelle le déplacement de la plate-forme pourrait être effectuer par voie hydraulique, sans pour autant décrire les moyens nécessaires à cette fin. L'autre inconvénient majeur réside dans le fait que la plate-forme dans sa position de rangement occupe une partie arrière du pont du bateau, ce qui est autant de place utile perdue. Bien entendu en gardant la plate-forme dans sa position élevée de repos sur le pont du bateau on peut la maintenir fixe sur le bateau et satisfaire ainsi à toute exigence de sécurité.This known device has two major drawbacks. The control system of the support arm must be relatively complex in that it must not only ensure the horizontal maintenance of the platform, but must also ensure a displacement of the platform in an inclined position, which also involves an appropriate conformation of the upper wall of the rear part of the boat. However, the prior art is content with a general remark according to which the displacement of the platform could be effected hydraulically, without however describing the means necessary for this purpose. The other major drawback lies in the fact that the platform in its storage position occupies a rear part of the deck of the boat, which is as much useful space lost. Of course, by keeping the platform in its elevated position of rest on the deck of the boat, it can be kept fixed on the boat and thus meet any safety requirement.

La présente invention a pour but de proposer un dispositif bossoir qui ne présente pas les inconvénients qui viennent d'être énoncés du dispositif connu.The present invention aims to provide a davit device which does not have the drawbacks which have just been stated of the known device.

Ce but est atteint grâce aux caractéristiques qui sont énoncées dans la partie caractérisante de la revendication principale.This object is achieved thanks to the characteristics which are set out in the characterizing part of the main claim.

L'invention sera mieux comprise et d'autres buts, détails et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention, et dans lequel:The invention will be better understood and other objects, details and advantages thereof will appear more clearly during the explanatory description which follows, made with reference to the appended schematic drawings given solely by way of example illustrating an embodiment. of the invention, and in which:

La figure 1 est une vue latérale d'un dispositif bossoir selon l'invention, montrant ce dispositif dans ses deux positions extrêmes.Figure 1 is a side view of a davit device according to the invention, showing this device in its two extreme positions.

La figure 2 est une vue en direction de la flèche 11 sur la figure 1, du dispositif bossoir selon l'invention; etFigure 2 is a view in the direction of arrow 11 in Figure 1, of the davit device according to the invention; and

la figure 3 est une vue en direction de la flèche 111 de la figure 2, avec arrachement partiel.Figure 3 is a view towards arrow 111 of Figure 2, partially broken away.

Suivant les figures, un dispositif bossoir 1 est monté sur la partie arrière d'un bateau 2. Le dispositif bossoir 1 comprend essentiellement une plate-forme 3 et deux bras pivotants 4 de support de la plate-forme, des moyens de commande 5 du mouvement de pivotement des bras 4 et des moyens 6 adaptés pour assurer l'orientation horizontale de la plate-forme 1, indépendamment de la position angulaire des bras de support 4. Les bras 4 pivotent chacun dans un plan vertical.According to the figures, a davit device 1 is mounted on the rear part of a boat 2. The davit device 1 essentially comprises a platform 3 and two pivoting arms 4 for supporting the platform, control means 5 of the pivoting movement of the arms 4 and means 6 adapted to ensure the horizontal orientation of the platform 1, independently of the angular position of the support arms 4. The arms 4 each pivot in a vertical plane.

Chaque bras 4 de support de la plate-forme 1 est articulé en 7 à la partie inférieure extérieure du bateau 2, au-dessus de sa ligne de flottaison, de préférence au tableau arrière 8 de celui-ci. L'extrémité supérieure libre de chaque bras 4 est articulée en 10 à la structure inférieure de la plate-forme 1. Comme le montrent les figures 2 et 3, les points d'articulation 10 des bras 4 à la plate-forme 1 sont situés sensiblement au milieu de la plate-forme, symétriquement par rapport à l'axe longitudinal du bateau.Each support arm 4 of the platform 1 is articulated at 7 to the exterior lower part of the boat 2, above its waterline, preferably at the transom 8 of the latter. The free upper end of each arm 4 is articulated at 10 to the lower structure of the platform 1. As shown in Figures 2 and 3, the articulation points 10 of the arms 4 to the platform 1 are located substantially in the middle of the platform, symmetrically with respect to the longitudinal axis of the boat.

Comme il ressort clairement de la figure 1, le dispositif bossoir selon l'invention est adapté pour que la plate-forme 1 soit mobile en translation entre une position élevée extrême a au-dessus du niveau d'eau 11 et une position extrême basse b en dessous du niveau 11, tout en étant maintenue dans une position horizontale. Pour permettre le déplacement de la plate-forme entre les deux positions extrêmes a et b, les bras de support 4 sont coudés de façon appropriée de telle sorte que leurs parties supérieures articulées en 10 à la plate-forme s'étendent verticalement et horizontalement selon que la plate-forme se trouve respectivement dans sa position élevée a ou sa position basse b.As is clear from Figure 1, the davit device according to the invention is adapted so that the platform 1 is movable in translation between an extreme high position a above the water level 11 and an extreme low position b below level 11, while being kept in a horizontal position. To allow the movement of the platform between the two extreme positions a and b, the support arms 4 are bent appropriately so that their upper parts articulated at 10 to the platform extend vertically and horizontally along that the platform is respectively in its raised position a or its lower position b.

Les moyens de commande 5 du pivotement des bras 4 peuvent être réalisés de toute manière appropriée, mais sont formés avantageusement par un vérin hydraulique articulé à une extrémité en 12 au tableau arrière 8 du bateau et par son autre extrémité, en 13, à une barre transversale 14 formant entretoise et s'étendant entre les deux bras 4. Les moyens 6 de maintien en position horizontale de la plate-forme 1 sont formés par un servo-moteur tel que par exemple un vérin hydraulique articulé par son corps en 15 à la structure inférieure de la plate-forme et par l'extrémité de sa tige de piston, en 16, à une barre transversale 17 de liaison des deux bras 4. Le vérin hydraulique 5 de commande du pivotement des bras 4 et le vérin hydraulique 6 de maintien en position horizontale de la plate-forme 1 sont de préférence coordonnés automatiquement de façon à assurer constamment la position horizontale de la plate-forme.The control means 5 for pivoting the arms 4 can be made in any suitable manner, but are advantageously formed by a hydraulic cylinder articulated at one end at 12 to the transom 8 of the boat and by its other end, at 13, to a bar transverse 14 forming a spacer and extending between the two arms 4. The means 6 for holding the platform 1 in a horizontal position are formed by a servo-motor such as for example a hydraulic jack articulated by its body at 15 to the lower structure of the platform and by the end of its piston rod, at 16, to a transverse bar 17 connecting the two arms 4. The hydraulic cylinder 5 for controlling the pivoting of the arms 4 and the hydraulic cylinder 6 for maintaining the horizontal position of the platform 1 are preferably automatically coordinated so as to constantly ensure the horizontal position of the platform.

La plate-forme 1 a une forme et une grandeur appropriées pour recevoir un berceau 18 adaptable à tout type d'objet d'annexes, tel qu'une embarcation de sauvetage 20 illustrée sur la figure, schématiquement en lignes fantômes.The platform 1 has a shape and a size suitable for receiving a cradle 18 adaptable to any type of annex object, such as a lifeboat 20 illustrated in the figure, schematically in phantom lines.

La forme et la grandeur des bras pivotants 4 sont telles que, dans sa position extrême basse b, la plate-forme est immergée à une profondeur suffisante pour permettre la mise à l'eau et la flottaison de l'embarcation 20 ainsi que la mise sur le berceau 18 d'une embarcation flottante 20. Dans sa position extrême haute a, la plate-forme 1 est située à un niveau supérieur au niveau du franc-bord du bateau. Deux dispositifs de fixation de sécurité 21, de part et d'autre de l'axe longitudinal du bateau 2, peuvent être prévus pour rendre la plate-forme amoviblement solidaire de la structure voisine du bateau, lorsqu'elle se trouve dans sa position extrême haute a. Chacun des dispositifs de fixation de sécurité 21 peut être constitué par exemple par un système de chape et de tenon respectivement solidaire du bateau et de la plate-forme ou inversement et accouplable par une broche verrouillable.The shape and size of the pivoting arms 4 are such that, in its extreme low position b, the platform is submerged to a depth sufficient to allow the launching and floating of the boat 20 as well as the setting on the cradle 18 of a floating boat 20. In its extreme high position a, the platform 1 is located at a level higher than the level of the freeboard of the boat. Two safety fastening devices 21, on either side of the longitudinal axis of the boat 2, can be provided to make the platform removably integral with the structure adjacent to the boat, when it is in its extreme position high a. Each of the safety fastening devices 21 can be constituted for example by a yoke and tenon system respectively secured to the boat and the platform or vice versa and can be coupled by a locking pin.

La plate-forme peut être équipée d'une commande à distance des moyens de commande 5, 6 ainsi que d'une signalisation lumineuse de son état et/ou de son fonctionnement.The platform can be equipped with a remote control of the control means 5, 6 as well as a light signaling of its state and / or of its operation.

L'invention présente notamment le grand avantage de permettre la navigation d'un bateau en haute mer en toute sécurité en ce qui concerne l'embarcation annexe disposée en poupe et aussi de pouvoir retourner complètement l'embarcation sur son berceau en période d'hivernage ou de grande traversée afin d'éviter qu'elle se remplisse d'eau de pluie ou de mer. La plate-forme peut également servir de plate-forme de bain et de solarium ainsi qu'à d'autres usages divers, par exemple comme moyen ascenseur ou élévateur ou analogue.The invention has in particular the great advantage of allowing the navigation of a boat on the high seas in complete safety with regard to the annexed boat arranged in stern and also of being able to completely turn over the boat on its cradle during wintering or large crossing to prevent it from filling with rain or sea water. The platform can also be used as a bathing and solarium platform as well as for other various uses, for example as a means of lifting or lifting or the like.

Bien entendu de nombreuses modifications peuvent être apportées au mode de réalisation qui vient d'être décrit et qui est représenté aux figures, sans sortir du cadre de la présente invention. La plate-forme peut être située à tout endroit d'un bateau. Les bras de support pourraient être articulés à la plate-forme, au niveau de ses côtés latéraux et/ou à son côté adjacent au bateau. Un seul bras de support pourrait être sufisant pour le support de la plate-forme.Of course many modifications can be made to the embodiment which has just been described and which is shown in the figures, without departing from the scope of the present invention. The platform can be located anywhere on a boat. The support arms could be articulated to the platform, at its lateral sides and / or at its side adjacent to the boat. A single support arm could be sufficient for the support of the platform.

Claims (6)

1. Ship's davit device, in particular for launching and supporting an object, e.g. a lifeboat or an additional boat, comprising a platform adapted to carry on its upper surface the said object and mounted on the ship so as to be mobile in translation while being maintained in a substantially horizontal position, on at least a part of its path, between a high position over the water level and a low position, advantageously below the water level, so as to permit the floating of the said object, the platform being supported by at least one pivoting arm hinged at one end to the platform and pivotably mounted at its other end on the lower outer part of the ship, the actuating of the platform being advantageously carried out hydraulically, characterized in that the platform (3) is maintained in its high position of arrangement outboard of the ship, in that it comprises a safety attaching device (21) which permits to make the platform (3) removably solid with the structure of the ship, when the platform is in the said position of arrangement, this attaching device (21) and the pivoting arm (24) forming a support system for the platform, totally independent from the actuating means for the displacement of the platform, and in that the actuating means comprise a hydraulic jack (5) for controlling the pivoting of the pivoting arm (4), hinged by its ends to said arm (4) and advantageously to the upper outer part of the ship (2) and a hydraulic jack (6) for maintaining the platform in a horizontal position, mounted between the said arm (4) and the platform, these hydraulic jacks being adapted to co-operate so as to automatically ensure the horizontal orientation of the platform during the whole path of the platform between its low and high positions.
2. Device according to claim 1, characterized in that the free end of the pivoting arm forming means (4) is hinged to the lower structure of the platform, advantageously to the middle part of this structure.
3. Device according to one of claims 1 or 2, characterized in that the means for hinging the pivoting arms forming means (4) to the ship (2) are disposed over the floating line and in that the arms forming means are bent so as to permit the lowering of the platform under the water level.
4. Device according to one of the preceding claims, characterized in that the platform (3) is provided for at the rear part of the ship, the pivoting arms forming means (4) being advantageously hinged to the rear board (8) thereof.
5. Device according to one of the preceding claims, characterized in that the pivoting arms forming means (4) are formed by two arms.
6. Device according to claim 5, characterized in that the two pivoting arms (4) are linked through a cross-bar (14) and in that a single hydraulic jack (5) is provided for the pivoting of the two arms (4), this jack being hinged at its ends respectively to the ship (2) and to the middle part of the cross-bar (17).
EP85400274A 1984-02-17 1985-02-15 Ship's davit for launching and supporting an object, e.g. a lifeboat Expired EP0153248B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8402464 1984-02-17
FR8402464A FR2559732B1 (en) 1984-02-17 1984-02-17 BACKPACK DEVICE FOR BOATS, PARTICULARLY FOR LAUNCHING AND SUPPORTING AN OBJECT SUCH AS A RESCUE BOAT

Publications (2)

Publication Number Publication Date
EP0153248A1 EP0153248A1 (en) 1985-08-28
EP0153248B1 true EP0153248B1 (en) 1988-05-11

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EP85400274A Expired EP0153248B1 (en) 1984-02-17 1985-02-15 Ship's davit for launching and supporting an object, e.g. a lifeboat

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US (1) US4627377A (en)
EP (1) EP0153248B1 (en)
AU (1) AU3890985A (en)
CA (1) CA1222909A (en)
DE (1) DE3562596D1 (en)
ES (1) ES284713Y (en)
FR (1) FR2559732B1 (en)
GR (1) GR850421B (en)

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Publication number Publication date
ES284713Y (en) 1986-05-01
DE3562596D1 (en) 1988-06-16
EP0153248A1 (en) 1985-08-28
FR2559732A1 (en) 1985-08-23
AU3890985A (en) 1985-08-22
FR2559732B1 (en) 1988-01-22
US4627377A (en) 1986-12-09
GR850421B (en) 1985-06-18
CA1222909A (en) 1987-06-16
ES284713U (en) 1985-09-01

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