EP0414321B1 - Bossoir basculant pour canots à chute libre - Google Patents
Bossoir basculant pour canots à chute libre Download PDFInfo
- Publication number
- EP0414321B1 EP0414321B1 EP19900202237 EP90202237A EP0414321B1 EP 0414321 B1 EP0414321 B1 EP 0414321B1 EP 19900202237 EP19900202237 EP 19900202237 EP 90202237 A EP90202237 A EP 90202237A EP 0414321 B1 EP0414321 B1 EP 0414321B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cradle
- boat
- arm
- davit
- hoisting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- B63B23/28—Devices for projecting or releasing boats for free fall
Definitions
- This invention relates to launching apparatus for a free-fall boat as defined in the preamble of claim 1 and disclosed in DE-A-35 34 257.
- a disadvantage is that this form of launching cannot always take place, for example, in case ice and flotsam are floating in the water, on which the boat may be smashed.
- a veering and hoisting tackle is needed both for lowering the boat onto the water in a controlled manner and for hoisting it and placing it on the cradle.
- the boat For the free-fall launching of a boat, there is no difference with prior equipment. If, however, it is desired for the boat to be lowered in a controlled manner, it is attached to the davit, the cradle is tilted away from under the boat, and the boat is lowered by the davit.
- the boat When the option is for the controlled launching of a boat locked on the cradle, the boat is fastened to a winch rope or cable passed over the head of the hoisting/veering arm.
- the davit is tilted to the forward position, in which the cradle extends vertically downwards along the side. During this tilting movement, the boat's weight is taken over by the hoisting rope or cable, and after the cradle has been tilted away from under the boat, the boat can be launched by veering.
- the apparatus comprises a winch whose rope or cable is passed to the head of the hoisting/veering arm, and which winch is so adjustable, in conjunction with the positive torque acting on the davit due to the location of the centre of gravity relative to the hinge, that both with and without a boat being placed on the cradle, the davit tilts to its outboard end position under the control of the brake of the winch when the cradle is unlocked.
- a suspension block of such a weight that the block only, without any load being carried by it, is capable of veering the winch rope or cable.
- the winch rope or cable will be paid out further under the influence of the weight of the suspension block, and the tension in the hoisting cable or rope will be released, so that the block can be readily detached from the boat.
- Another advantage of this feature is that, for example in boat drills, when a boat is water-born, it is possible, without driving the winch in a veering sense, to lower the suspension block for grappling the boat and hoisting it.
- a stop for said block may be provided near the head of the hoisting arm, so that, in addition to the controlled outboard tilting of the assembly of cradle and hoisting/veering arm, the winch can also be used for tilting the assembly of cradle and hoisting/veering arm from the outward end position back to the inward end position.
- the hoisting rope or cable is lowered and fastened to the boat.
- the winch is driven in a winding sense so that the boat is hoisted out of the water.
- This hoisting operation is maintained until the suspension block touches the stop near the head of the hoisting/veering arm. From this moment, pulling with the winch will cause the davit to tilt inwardly, while the boat remains at the same distance from the head of the arm.
- the boat is pulled inwards until it reaches a position over the cradle at the moment the cradle reaches its stand-by, sloping starting position.
- the cradle can now be locked and the boat can be lowered onto it.
- the suspension block can be detached from the boat and the boat is ready for a free-fall launch.
- the free-fall boat For the controlled launching of the free-fall boat, it is fastened to the hoisting block, uncoupled from the cradle, and during the outward tilting movement the boat is automatically lifted off its cradle.
- the resultant of the rope forces acting on the hoisting arm may be such relative to the hinge that the davit is kept in the inward tilted position, and the cradle bars the boat from being lowered further.
- the boat By providing the hoisting arm with a catch, in accordance with the present invention, which catch is operative to support the block through a limited tilting angle of the arm, the boat can be temporarily suspended from the catch, until the assembly of davit and the boat hanging above the cradle tilts to the outboard position.
- the catch which may take the form of a hook projecting from the arm, may be so dimensioned that, after a tilting movement of the davit assembly which moves the cradle outside the launching path of the boat, the hoisting block is no longer supported by the hook, and the boat can be veered.
- the tilting davit can also be used for correcting the cradle slope at various list positions.
- a davit 3 essentially composed of a cradle 4 and a hoisting/veering arm 6 connected to the cradle at a fixed angle by a frame 5.
- Davit 3 is shown in Fig. 1 in an inwardly tilted position, in which the cradle slopes outwardly in a stand-by position for the free-fall launch of a life-saving sloop 7 placed on it.
- the sloop 7, which rests upon and between rollers 8, is lockable relative to cradle 4 from the sloop.
- the sloop is attached through so-called bridles 11 to the eyelet 12 of a hoisting block 13, which through a stop 14 is fastened to a cable 16 of a winch 17, passed over rollers 15.
- a hook-shaped catch 19 extends a small distance outwardly from hoisting/veering arm 6.
- the hoisting/veering arm 6 In the inwardly tilted position of davit 3 (see Fig. 1 and Fig. 3A), the hoisting/veering arm 6 is directed virtually vertically, and block 13 rests upon catch 19.
- the weight of the (manned) sloop 7 is transmitted through block 13 to catch 19.
- This position of the hoisting and veering arm 6 corresponds to such a distribution of forces in the cable that, even without being supported on catch 19, the assembly of cradle 4, hoisting/veering arm 6, and sloop 7 tilts on into the outward end position, in which frame 5 is in contact with a stop 20, which corresponds to a virtually vertical position of the cradle next to, and outside of, the launching path of sloop 7.
- Block 13 is sufficiently heavy for cable 16 to be veered even without carrying the sloop. This is of importance in connection with the possibility of practicing with the tiltable gravity davit and a free-fall boat, which requires the sloop to be repeatedly hauled out of the water and re-installed on the cradle.
- the davit After a free-fall launch, the davit is in the position shown in Fig. 1. Hoisting the sloop requires the davit to be first moved into the position shown in Fig. 2. This is effected during boat drills by unlocking cradle 4 at 9, and releasing the winch brake. Under the influence of the outboard location of the centre of gravity, davit 3 tilts automatically into its outboard position, and block 13, which has meanwhile been released by catch 19 is lowered, while winch cable 16 is being veered, to the water surface, where the sloop can be grappled. By driving the winch, the sloop is hoisted until block 13 touches stop 14.
- the winch 17 then pulls davit 3 inwards, and sloop 7 comes to hang a short distance above the cradle 4, which has returned into its stand-by position.
- cradle 4 has again been locked (at 9)
- the sloop can be lowered onto the cradle and locked relative to cradle 4.
- guide rollers 15 The location of guide rollers 15 has been so selected that during the hoisting of the sloop, it is just the sloop which moves upwards, without davit 3 being tilted back.
- the davit When a sloop has been lowered in a controlled fashion and has to be hoisted up, the davit is already in the outboard position shown in Fig. 2 and the block can be directly coupled to the water-born sloop.
Landscapes
- 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)
- Bridges Or Land Bridges (AREA)
Claims (6)
- Appareil de lancement pour canot à chute libre (7) avec berceau de lancement incliné (4) situé sur une planche ou un côté d'un bateau ou d'une structure pétrolière marine (1), sur lequel un canot de sauvetage (7) peut être verrouillé de façon amovible, dans lequel ledit berceau (4) est connecté selon un angle fixé à un bras de levage/tournage (6), constituant ensemble une partie d'un montage de bossoir (3), ledit montage (3) étant monté pour un mouvement basculant sur une charnière (2) s'étendant le long de la planche ou du côté d'un bateau ou d'une structure pétrolière marine (1) entre une position basculée vers l'intérieur, dans laquelle le berceau (4) occupe une position d'attente, incliné hors de la planche ou du côté d'un bateau ou d'une structure pétrolière marine (1) et une position basculée vers l'extérieur dans laquelle le montage de bossoir (3) peut fonctionner en élevant ou en abaissant un canot à chute libre (7), caractérisé en ce que, dans la position basculée vers l'intérieur, le centre de gravité du montage de bossoir (3) est situé à l'extérieur de la charnière (2) et le montage (3) étant dans la position basculée vers l'intérieur, est verrouillé de façon amovible par un verrou (9), ledit berceau (4) dans la position basculée vers l'extérieur s'étendant sensiblement vers le bas le long du côté extérieur du bateau ou de la structure pétrolière marine (1) et ledit bras de levage/tournage (6) s'étendant depuis ladite charnière (2), sa tête (12) étant située au-delà du berceau (4).
- Appareil selon la revendication 1, caractérisé en ce qu'il comporte également un treuil (17) dont la corde ou le câble passe par la tête (12) du bras de levage/tournage (6), lequel treuil (17) étant ainsi réglable, conjointement avec le couple positif qui agit sur le bossoir (3) en raison de l'emplacement du centre de gravité par rapport à la charnière (2), qu'à la fois avec et sans canot (7) placé sur le berceau (4), le bossoir (3) s'incline dans sa position d'extrémité vers l'extérieur sous le contrôle du frein du treuil, lorsque le berceau est déverrouillé.
- Appareil selon la revendication 2, caractérisé en ce qu'il est fait usage d'un bloc de suspension (13) dont le poids est tel que le bloc (13) seul, sans qu'il ne porte aucune charge, est capable de faire filer la corde ou le câble du treuil.
- Appareil selon la revendication 3, caractérisé par une butée (14) destinée audit bloc (13), prévue près de la tête (18) dudit bras (6).
- Appareil selon la revendication 3 ou 4, caractérisé en ce que le bras (6) comporte un cliquet (19) fonctionnant en soutenant le bloc (13) selon un angle d'inclinaison limité du bras (6).
- Appareil selon la revendication 5, caractérisé en ce que le cliquet a la forme d'un crochet se projetant depuis le bras (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8902103 | 1989-08-21 | ||
NL8902103A NL8902103A (nl) | 1989-08-21 | 1989-08-21 | Kantelbare zwaartekrachtdavit voor vrije-valboot. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0414321A1 EP0414321A1 (fr) | 1991-02-27 |
EP0414321B1 true EP0414321B1 (fr) | 1993-11-24 |
Family
ID=19855188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900202237 Expired - Lifetime EP0414321B1 (fr) | 1989-08-21 | 1990-08-20 | Bossoir basculant pour canots à chute libre |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0414321B1 (fr) |
DE (1) | DE69004762T2 (fr) |
ES (1) | ES2046676T3 (fr) |
FI (1) | FI904145A0 (fr) |
NL (1) | NL8902103A (fr) |
NO (1) | NO173223C (fr) |
WO (1) | WO1992015480A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8902103A (nl) * | 1989-08-21 | 1991-03-18 | Schat Davit Bv | Kantelbare zwaartekrachtdavit voor vrije-valboot. |
KR101620917B1 (ko) * | 2014-05-28 | 2016-05-13 | 대우조선해양 주식회사 | 자유낙하 구명정의 제동장치 |
CN105620669A (zh) * | 2014-10-31 | 2016-06-01 | 无锡晟欧船舶设备有限公司 | 一种自由降落式救生艇降放装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3515544A1 (de) * | 1985-04-30 | 1986-10-30 | Neuenfelder Maschinenfabrik, 2101 Hamburg | Vorrichtung zum aussetzen eines bootes vom heck eines schiffes, insbesondere eines freifallbootes |
DE3534257C2 (de) * | 1985-09-26 | 1996-10-31 | Robert Hatecke | Schwenkbar angeordnete Ablaufbahn für Freifallboote auf Schiffen |
NL8902103A (nl) * | 1989-08-21 | 1991-03-18 | Schat Davit Bv | Kantelbare zwaartekrachtdavit voor vrije-valboot. |
-
1989
- 1989-08-21 NL NL8902103A patent/NL8902103A/nl not_active Application Discontinuation
-
1990
- 1990-08-20 EP EP19900202237 patent/EP0414321B1/fr not_active Expired - Lifetime
- 1990-08-20 ES ES90202237T patent/ES2046676T3/es not_active Expired - Lifetime
- 1990-08-20 DE DE1990604762 patent/DE69004762T2/de not_active Expired - Fee Related
- 1990-08-21 NO NO903671A patent/NO173223C/no unknown
- 1990-08-21 FI FI904145A patent/FI904145A0/fi not_active Application Discontinuation
-
1991
- 1991-02-27 WO PCT/NL1991/000032 patent/WO1992015480A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
NO173223B (no) | 1993-08-09 |
DE69004762T2 (de) | 1994-04-14 |
NO903671L (no) | 1991-02-22 |
NO903671D0 (no) | 1990-08-21 |
NO173223C (no) | 1993-11-17 |
FI904145A0 (fi) | 1990-08-21 |
EP0414321A1 (fr) | 1991-02-27 |
WO1992015480A1 (fr) | 1992-09-17 |
NL8902103A (nl) | 1991-03-18 |
DE69004762D1 (de) | 1994-01-05 |
ES2046676T3 (es) | 1994-02-01 |
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