EP0145689A2 - Dispositif bossoir - Google Patents

Dispositif bossoir Download PDF

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Publication number
EP0145689A2
EP0145689A2 EP84850392A EP84850392A EP0145689A2 EP 0145689 A2 EP0145689 A2 EP 0145689A2 EP 84850392 A EP84850392 A EP 84850392A EP 84850392 A EP84850392 A EP 84850392A EP 0145689 A2 EP0145689 A2 EP 0145689A2
Authority
EP
European Patent Office
Prior art keywords
davit
wire
pivoting
arm
pulley
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.)
Withdrawn
Application number
EP84850392A
Other languages
German (de)
English (en)
Other versions
EP0145689A3 (fr
Inventor
Per Nilsson
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.)
Welin AB
Original Assignee
Welin AB
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 Welin AB filed Critical Welin AB
Publication of EP0145689A2 publication Critical patent/EP0145689A2/fr
Publication of EP0145689A3 publication Critical patent/EP0145689A3/fr
Withdrawn legal-status Critical Current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 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts

Definitions

  • the present invention relates to a device for pivoting an accommodation ladder from a stowing position on a ship's deck to a position outside the ship's side by means of at least a wire or the like, which is connected to the ladder by at least a pulley firmly mounted above the davit.
  • the ladder When pivoting an accommodation ladder from a stowing position on the ship's deck to a position outside the ship's side, for example 180 degrees, the ladder must pass the dead centre level of the davit, i.e. a vertical line through the pivot axle of the davit device, in order to be lowered.
  • the operation of the accommodation ladder is performed by means of a wire, which is laid over a pulley suspended in a block at some distance above the davit.
  • the pulley at the block In order to pass the dead centre the pulley at the block is in a previously known construction moveably mounted in guides and displaceable by means of a suitable driving device, for example a pneumatic linear motor, through which the point of suspension of the accommodation ladder can be displaced.
  • the pulley at the block is mounted in one arm of two-armed link, which is pivotable between two end position, at which the pivoting is provided by a pulling force caused by the weight of the ladder.
  • This construction operates per se perfectly, but implies that there is enough space for the displaceable two-armed link, which is not always the case if the available height is limited by e.g. an upper work. It is further a desire to concentrate the whole mechanism to the davit of the accommodation ladder, which in that way can be trimmed in the workshop, while the previously known device is divided on at least two different places, which means that it must be
  • the object of the present invention is to provide a davit device which without any external facilities can be automatically brought to pivot past the dead centre at a pivoting of 160 degrees, as well as at the lowering and the raising of the ladder.
  • Another object of the invention is to provide a simple and reliable and at the same time cheap construction, which consists of a few moveable parts.
  • the davit device consists of one or several davit arms 11, one end of which is pivotably mounted about an axle 12, and an accommodation ladder 13 supported by the davit arms, which during out- and inwards rotation by means of a wire system 14 is held in close contact against the davit arm 11.
  • a wire guiding device 15 is rotatably mounted, alternatively if double wires are used, as in the case shown in the embodimet, a wire guiding device 15 according to fig. 3 is arranged on each side of the davit arm.
  • a block 17 At the side of the davit arm 11 on the ship's deck there is fixed a block 17, the block head of which is located above the stowing place of the accommodation ladder and which supports a undisplaceably mounted pulley 19. In stead of the block 17 the pulley 19 can be mounted at an arbitrary constructive element, which is available for the purpose.
  • a wsinsch 22 for the wires 14a and 14b and which is provided with double cable drums 21.
  • the wire guiding device of the davit arm consists of a two-armed link 23, the first link arm 24 of which is provided with a first pulley 25 and which at the rotation axle 26 between the arms 24, 28 is provided with a second pulley 27. At the free end of the other link arm 28 there is arranged a sleeve 29 extending over the davit arm, and which on the side the davit arm is connected with another similar wire guiding device 15.
  • a locking means 30 comprising a connecting member rotatable about a shaft pivot 31, e.g. a hook 32, which is provided with a counterweight 33, the object of which s to hold the hook in engagement with the sleeve as long as the davit and by that also the accommodation ladder 13 have passed the dead centre level 35 of the davit arm.
  • the davit device operates in the following way.
  • the wires 14 are hoisted home, at which the davit arms 11 with the accommodation ladder will pivot about the axle 12.
  • the wire guiding device 15 is locked to the davit by means of the locking means 30, so that the first arm 24 of the two-armed link 23 takes an outward pivoted position, in which the first pulley 25 is located outside the davit arm.
  • the davit arm with the accommodation ladder 13 connected thereto has passed the dead centre level 35, which means that the centre of gravity 36 of the accommodation ladder has passed a vertical line through the pivot axle 12 of the davit arm, so that when slackening the wire 14 the davit arm 11 completes its 180 degrees pivoting movement, so that the arm will be located outside the ship's side, as is shown in fig. 2.
  • the counterweight 33 at the hook 32 will make a limited rotating movement counter-clockwise about the shaft pivot 31, at which the wire guiding member 15 is released, so that it can rotate about the axle 26 a countinued lowering of the davit arm to outwards rotated position.
  • the wire 14 will during this rotating movement leave the first pulley 25, which then becomes inactive, while the pulley 26 takes over the function as the last pulley towards the fixed pulley 19.
  • the davit arm By rotating the davit arm inwards from lowered position, as is shown in fig. 2 with dash dotted lines, the davit arm will be rotated inwards as much as permitted by the wire 14, in a position in which the centre of gravity 36 of the accommodation ladder has reached the other side of the dead centre level 35, at which the davit arm by slackening of the wire is rotated downwards in the direction towards the deck.
  • the sleeve 29 at the other arm 28 of the link 23 will be brought to close contact with a fixed guiding surface 34, which forces the link 23 to rotate back to its initial position, in which the wire guiding device is reblocked by the locking means 30.
  • the rotation of the davit device past the dead centre level 35 can also be supported by means of a pressure member 37 either in combination with the wire guiding member 15 shown in figs. 1-3 or just by means of the pressure member as is shown in the figs. 4-7.
  • the pressure member 37 comprises an arm 39 actuated by a pressure spring 38 which in one end cooperates with the davit 11, while its other end is displaceablly mounted in a bracket 41 which is rotatable about a shaft pivot. Between the bracket and an attachment 42 fixedly arranged on the arm 29 said pressure spring 38 is fixed, which thus presses the arm against the davit 11.
  • the bearing shaft 40 is arranged eccentrically with respect to the pivot axle 12 of the davit and is preferably located on a vertical line through and above the pivot axle 12.
  • the end 43 of the arm 39 cooperating with the davit 11 is displaceably mounted in a guide rail 44 between two distinct end positions, said guide rail is fixedly connected to the davit.
  • Two brackets 46 and 47, which delimit the pivoting movement of the arm 39 to 180 degrees, are also arranged at the stand 45 supporting the pivot axle 12 of the davit.
  • the embodiment according to figs. 8 and 9 differs from the one disclosed in figs. 1-3 by the fact that the connection member, i.e. the hook 32 mounted at the davit 11, has been replaced by a rod 48, which is pivotally mounted at one arm 28 of the two-armed link 23 about a pivot 49.
  • the rod 48 cooperates and passes through a yoke 50 fixedly attached to the davit 11.
  • the rod 48 is provided with a recess 51, which is so placed that it in one end position of the wire guiding device 15, i.e. the stowing position according to fig. 8, overlaps the yoke 50 so that the wire guiding device 15 is blocked from being pivoted about the shaft pivot 26.
  • the yoke 50 has such a free height that the rod 48 freely can pass under the yoke, which is done when the davit 11 with the ladder 13 connected thereto has passed the dead centre level 35.
  • the weight of the rod it will thus be disengaged from the yoke 50, as is shown in fig. 9, which means that when the davit is pivoted back from its lowered position, the farthest out point of action of the wire 14 at the davit 11 will no longer be the pulley 25 but instead the pulley 27, which is located further in towards the davit, which means that when the wire 14 is retracted as far as possible, the common centre of gravity 36 of the davit and ladder has passed the dead centre level 35.
  • a fixed guide member 52 is aranged on the ship's deck 16, said guide member cooperates with a lever arm 53 at the two- armed link 23.
  • the lever arm 53 will abut the guide member 52, so that the two-armed link 23 is pivoted clockwise to the position shown in fig. 8 with continuous lines.
  • the invention is not limited to the embodiments shown but a plurality of modifications are possible within the scope of the claims.
  • the locking effect of the locking member 30 can be ceased e.g. by cooperation with an appropriate cam disk of the like instead of by means of a counterweight.
  • the wire 14 also serves as a lowering member for lowering and raising the accommodation ladder, but it would of course also be possible to have separate wires for these two functions. Further it is possible and in certain cases also recommandable to combine certain structural parts according to some of the shown embodiments with each other.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Ladders (AREA)
  • Jib Cranes (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Glass Compositions (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Surgical Instruments (AREA)
EP84850392A 1983-12-15 1984-12-17 Dispositif bossoir Withdrawn EP0145689A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8306943A SE8306943L (sv) 1983-12-15 1983-12-15 Devertanordning
SE8306943 1983-12-15

Publications (2)

Publication Number Publication Date
EP0145689A2 true EP0145689A2 (fr) 1985-06-19
EP0145689A3 EP0145689A3 (fr) 1987-10-21

Family

ID=20353748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84850392A Withdrawn EP0145689A3 (fr) 1983-12-15 1984-12-17 Dispositif bossoir

Country Status (6)

Country Link
EP (1) EP0145689A3 (fr)
JP (1) JPS60169394A (fr)
KR (1) KR850004218A (fr)
FI (1) FI844972L (fr)
NO (1) NO845066L (fr)
SE (1) SE8306943L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102514567A (zh) * 2011-11-30 2012-06-27 深圳市五洲龙汽车有限公司 汽车气压制动系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152454A (en) * 1966-05-25 1969-05-21 Cantieri Navali Italiani Andsa A Ship's Accommodation Ladder
GB1339850A (en) * 1970-02-09 1973-12-05 Welin Ab Accomodation ladders
DE2433847A1 (de) * 1974-07-15 1976-01-29 Ver Deutsche Metallwerke Ag Fallreep - schwenkvorrichtung
EP0064482A2 (fr) * 1981-04-13 1982-11-10 Ab Welin Méthode et dispositif pour le pivotement d'une échelle de coupée

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152454A (en) * 1966-05-25 1969-05-21 Cantieri Navali Italiani Andsa A Ship's Accommodation Ladder
GB1339850A (en) * 1970-02-09 1973-12-05 Welin Ab Accomodation ladders
DE2433847A1 (de) * 1974-07-15 1976-01-29 Ver Deutsche Metallwerke Ag Fallreep - schwenkvorrichtung
EP0064482A2 (fr) * 1981-04-13 1982-11-10 Ab Welin Méthode et dispositif pour le pivotement d'une échelle de coupée

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102514567A (zh) * 2011-11-30 2012-06-27 深圳市五洲龙汽车有限公司 汽车气压制动系统

Also Published As

Publication number Publication date
FI844972L (fi) 1985-06-16
SE8306943L (sv) 1985-06-16
EP0145689A3 (fr) 1987-10-21
SE8306943D0 (sv) 1983-12-15
JPS60169394A (ja) 1985-09-02
KR850004218A (ko) 1985-07-11
FI844972A0 (fi) 1984-12-17
NO845066L (no) 1985-06-17

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Inventor name: NILSSON, PER