WO1992015480A1 - Portemanteau basculant par gravite pour un bateau a chute libre - Google Patents

Portemanteau basculant par gravite pour un bateau a chute libre Download PDF

Info

Publication number
WO1992015480A1
WO1992015480A1 PCT/NL1991/000032 NL9100032W WO9215480A1 WO 1992015480 A1 WO1992015480 A1 WO 1992015480A1 NL 9100032 W NL9100032 W NL 9100032W WO 9215480 A1 WO9215480 A1 WO 9215480A1
Authority
WO
WIPO (PCT)
Prior art keywords
cradle
arm
davit
boat
hoisting
Prior art date
Application number
PCT/NL1991/000032
Other languages
English (en)
Inventor
Jacobus Van Drunen
Original Assignee
Schat-Davit Company B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schat-Davit Company B.V. filed Critical Schat-Davit Company B.V.
Publication of WO1992015480A1 publication Critical patent/WO1992015480A1/fr

Links

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 with a sloping launching cradle at a board or side of a ship or offshore structure, on which a lifeboat can be releasibly locked.
  • 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.
  • said cradle is mounted for tilting movement and when its lock has been released can be tilted between an inwardly tilted position, in which the cradle occupies a stand-by position sloping away from the board or side of a ship or offshore structure and an outwardly tilted position in which said cradle extends substantially downwardly along the outboard side, said
  • tiltable cradle constituting part of a davit which, in the outwardly tilted position of the cradle, can be operative to raise or lower a free-fall boat, said cradle being connected at a fixed angle to a hoisting/veering arm and the davit assembly constituted by said cradle and said arm being
  • the davit being tiltable between an inward end position, in which the cradle is in a lockable, sloping stand-by position, and an outward end position, in which the cradle extends substantially vertically downwardly along the side and the hoisting/veering arm extends outboard with the head of the arm beyond 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
  • the hoisting rope or cable is lowered and fastened to the boat. Subsequently, 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 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
  • 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
  • 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.
  • Fig. 1 is a side-elevational view of the davit in the inward tilted position, suitable for launching a life-boat in free fall;
  • Fig. 2 shows the davit illustrated in Fig. 1 in the position in which the boat can be lowered by the davit in a controlled fashion
  • Figs. 3A and 3B are enlarged details, showing the head of the hoisting/veering arm in two different tilted positions.
  • a davit 3 essentially composed of a cradle 4 and a
  • 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. When circumstances do not permit sloop 7 to be launched in free fall, it can be lowered in a controlled fashion by means of davit 3.
  • 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.
  • 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.
  • the cradle has been
  • 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 reinstalled 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 sloopishoisted 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.

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)

Abstract

Appareil de mise à l'eau d'un bateau à chute libre doté d'un berceau incliné (4), situé à bord ou sur le côté d'un bateau ou d'une structure en mer (1), sur lequel un bateau de sauvetage peut être immobilisé de manière détachable. Ledit berceau (4) est monté de façon à pouvoir effectuer un mouvement de bascule et lorsque son système de blocage (9) est débloqué, il peut être basculé entre une position d'inclinaison vers l'intérieur dans laquelle le berceau (4) occupe une position d'attente inclinée qui l'éloigne du bord ou du côté d'un bateau ou d'une structure en mer (1) et une position d'inclinaison vers l'extérieur dans laquelle ledit berceau (4) s'étend pratiquement vers le bas le long du bord externe du bateau. Ledit berceau basculant (4) constitue une partie d'un portemanteau (3) qui, dans la position inclinée vers l'extérieur du berceau, peut fonctionner afin d'élever ou d'abaisser un bateau à chute libre. Le berceau est relié à un angle fixe à un bras de levage/détachage (6) et l'ensemble portemanteau (30) constitué par ledit berceau (4) et ledit bras (6) est monté par charnière (2) sur le bord ou le côté d'un bateau ou d'une structure en mer (1), le centre de gravité dudit ensemble étant situé sur le côté de la charnière (2) situé à l'extérieur du bateau, le portemanteau (3) étant basculant entre une position interne extrême dans laquelle le berceau (4) se trouve dans une position d'attente, inclinée, et de blocage (9) et une position externe extrême dans laquelle le berceau (4) s'étend pratiquement verticalement le long du bord et le bras de levage/détachage (6) s'étend vers l'extérieur du bateau, la tête dudit bras étant située au-delà du berceau (4).
PCT/NL1991/000032 1989-08-21 1991-02-27 Portemanteau basculant par gravite pour un bateau a chute libre WO1992015480A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8902103A NL8902103A (nl) 1989-08-21 1989-08-21 Kantelbare zwaartekrachtdavit voor vrije-valboot.

Publications (1)

Publication Number Publication Date
WO1992015480A1 true WO1992015480A1 (fr) 1992-09-17

Family

ID=19855188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1991/000032 WO1992015480A1 (fr) 1989-08-21 1991-02-27 Portemanteau basculant par gravite pour un bateau a 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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

Citations (3)

* Cited by examiner, † Cited by third party
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
DE3534257A1 (de) * 1985-09-26 1987-04-02 Robert Hatecke Schiff mit einer schwenkbar angeordneten ablaufbahn fuer freifallboote
NO903671L (no) * 1989-08-21 1991-02-22 Schat Davit Bv Vippende gravitasjonsdavit for frittfallbaat.

Patent Citations (3)

* Cited by examiner, † Cited by third party
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
DE3534257A1 (de) * 1985-09-26 1987-04-02 Robert Hatecke Schiff mit einer schwenkbar angeordneten ablaufbahn fuer freifallboote
NO903671L (no) * 1989-08-21 1991-02-22 Schat Davit Bv Vippende gravitasjonsdavit for frittfallbaat.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
NO173223C (no) 1993-11-17
NL8902103A (nl) 1991-03-18
EP0414321B1 (fr) 1993-11-24
NO173223B (no) 1993-08-09
DE69004762D1 (de) 1994-01-05
ES2046676T3 (es) 1994-02-01
EP0414321A1 (fr) 1991-02-27
DE69004762T2 (de) 1994-04-14
NO903671D0 (no) 1990-08-21
FI904145A0 (fi) 1990-08-21
NO903671L (no) 1991-02-22

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