EP0414321B1 - Kippdavit für Freifall-Rettungsboote - Google Patents

Kippdavit für Freifall-Rettungsboote Download PDF

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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
Application number
EP19900202237
Other languages
English (en)
French (fr)
Other versions
EP0414321A1 (de
Inventor
Jacobus Van Drunen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHAT-DAVIT Co BV
Original Assignee
SCHAT-DAVIT Co BV
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 Co BV filed Critical SCHAT-DAVIT Co BV
Publication of EP0414321A1 publication Critical patent/EP0414321A1/de
Application granted granted Critical
Publication of EP0414321B1 publication Critical patent/EP0414321B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)

  1. Stapellauf-Vorrichtung für ein freifallendes Boot (7) mit einem schräg abwärts gerichteten Stapellauf-Schlitten (4) an Deck oder an der Seite eines Schiffes oder einer Offshore-Struktur (1), an der ein Rettungsboot (7) lösbar arretiert werden kann, wobei dieser Schlitten (4) unter einem festen Winkel mit einem Arm zum Aufholen/Wegfieren (6) verbunden ist und mit ihm zusammen einen Teil eines Davit-Aufbaus (3) bildet, und wobei dieser Aufbau (3), der für die Kippbewegung auf ein Drehgelenk (2) montiert ist, sich an Deck oder an der Seite eines Schiffes oder einer Offshore-Struktur (1) zwischen einer einwärts geneigten Position, in der der Schlitten (4) eine Standby-Position einnimmt, die von Deck oder der Seite eines Schiffes oder einer Offshore-Struktur (1) schräg nach außen geneigt ist, und einer auswärts geneigten Position, in der der Davit-Aufbau (3) betriebsbereit zum Heben oder Absenken eines Freifall-Bootes (7) ist, erstreckt,
    dadurch gekennzeichnet,
    daß in der einwärts geneigten Position der Schwerpunkt des Davit-Aufbaus (3) außenbords des Drehgelenks (2) gelegen ist und der Aufbau (3) in der einwärts geneigten Position lösbar durch eine Verriegelung (9) arretierbar ist, wobei der Schlitten (4) in der auswärts geneigten Position sich im wesentlichen abwärts entlang der Außenbordseite des Schiffs oder der Offshore-Struktur (1) erstreckt und der Arm zum Aufholen/Wegfieren (6) sich von dem Drehgelenk (2) mit seinem Kopf (12) über den Schlitten (4) hinaus erstreckt.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß sie eine Winde (17) umfaßt, deren Tau oder Trosse zu dem Kopf (12) des Arms zum Aufholen/Wegfieren (6) geführt wird, wobei diese Winde (17) in Verbindung mit dem positiven Drehmoment, das auf den Davit (3) aufgrund der Lage des Schwerpunkts bezüglich des Drehgelenks (2) wirkt, so einstellbar ist, daß sowohl mit, als auch ohne ein Boot (7), das auf dem Schlitten (4) liegt, der Davit (3) unter der Kontrolle der Windenbremse in seine Außenbord-Endposition kippt, wenn der Schlitten entriegelt ist.
  3. Vorrichtung nach Anspruch 2,
    gekennzeichnet durch
    die Verwendung eines Aufhängeblocks (13) von einem solchen Gewicht, daß der Block (13) allein, ohne daß irgendeine Last von ihm getragen wird, dazu in der Lage ist, das Windentau oder die Windentrosse abzufieren.
  4. Vorrichtung nach Anspruch 3,
    gekennzeichnet durch
    einen Anschlag (14) für diesen Block (13), der nahe dem Kopf (18) des Armes (6) vorgesehen ist.
  5. Vorrichtung nach Anspruch 3 oder 4,
    dadurch gekennzeichnet,
    daß der Arm (6) mit einem Greifhaken (19) versehen ist, der wirksam ist, um den Block (13) während eines begrenzten Kippwinkels des Arms (6) zu halten.
  6. Vorrichtung nach Anspruch 5,
    dadurch gekennzeichnet,
    daß der Greifhaken die Form eines Hakens hat, der aus dem Arm (6) vorragt.
EP19900202237 1989-08-21 1990-08-20 Kippdavit für Freifall-Rettungsboote Expired - Lifetime EP0414321B1 (de)

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 (de) 1991-02-27
EP0414321B1 true EP0414321B1 (de) 1993-11-24

Family

ID=19855188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900202237 Expired - Lifetime EP0414321B1 (de) 1989-08-21 1990-08-20 Kippdavit für Freifall-Rettungsboote

Country Status (7)

Country Link
EP (1) EP0414321B1 (de)
DE (1) DE69004762T2 (de)
ES (1) ES2046676T3 (de)
FI (1) FI904145A0 (de)
NL (1) NL8902103A (de)
NO (1) NO173223C (de)
WO (1) WO1992015480A1 (de)

Families Citing this family (3)

* 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
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)

* 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
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.

Also Published As

Publication number Publication date
WO1992015480A1 (en) 1992-09-17
NO903671L (no) 1991-02-22
NO173223B (no) 1993-08-09
NO173223C (no) 1993-11-17
FI904145A0 (fi) 1990-08-21
ES2046676T3 (es) 1994-02-01
DE69004762D1 (de) 1994-01-05
NL8902103A (nl) 1991-03-18
DE69004762T2 (de) 1994-04-14
NO903671D0 (no) 1990-08-21
EP0414321A1 (de) 1991-02-27

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