WO1980002853A1 - A device for coupling together two bodies in any position with respect to each other,which bodies are mounted for a linear movement with respect to each other - Google Patents

A device for coupling together two bodies in any position with respect to each other,which bodies are mounted for a linear movement with respect to each other Download PDF

Info

Publication number
WO1980002853A1
WO1980002853A1 PCT/NL1980/000022 NL8000022W WO8002853A1 WO 1980002853 A1 WO1980002853 A1 WO 1980002853A1 NL 8000022 W NL8000022 W NL 8000022W WO 8002853 A1 WO8002853 A1 WO 8002853A1
Authority
WO
WIPO (PCT)
Prior art keywords
pawl means
bodies
pawl
respect
pivotal movement
Prior art date
Application number
PCT/NL1980/000022
Other languages
French (fr)
Inventor
B Boon
Original Assignee
Rsv Gusto Eng Bv
B Boon
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 Rsv Gusto Eng Bv, B Boon filed Critical Rsv Gusto Eng Bv
Priority to DE8080901227T priority Critical patent/DE3068014D1/en
Publication of WO1980002853A1 publication Critical patent/WO1980002853A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/06—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for immobilising, e.g. using wedges or clamping rings

Definitions

  • the invention relates to a device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear movement with respect to each other, in particular, in a self-raising platform structure, for coupling to each other the platform and a leg thereof.
  • the object of the invention is to provide a device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear displacement with respect to each other, said device being particularly suited for use in a self-raising platform structure so that it will be possible to lower the legs freely to the aqueous bottom and to engage the displacement system without the occurrence of impacts.
  • the device according to the inven tion comprises at least one set of pawl means, each pawl of which is pivotely connected to one of said bodies and is provided with a part capable of contacting the other one of said bodies, which pawl means are arranged at least on both sides of said other body and the pivot points of said pawl means are disposed in a plane extending transversely to the direction of displacement, while said pawl means are mounted for a pivotal movement and the contact parts thereof are shaped in such a manner that upon a pivotal movement of the pawl means towards each other in the direction of said one direction of relative linear displacement, corresponding points of the contact parts approach each other so that the relative movement between the bodies in this direction will be inhibited, while being allowed in the other direction, means being provided for making said pawl means to pivot towards and/or apart from each other as well as clamping means on the one body, said clamping means being operable to be brought into clamping engagement with said other body so that the relative displacement of the bodies with respect
  • said clamping means are formed by at least a second set of pawl means having the same construction as said first set of pawl means, and being spaced apart from sais first set of pawl means but which are mounted for a pivotal movement in such a manner that upon a pivotal movement thereof towards each other in the direction of the other direction of relative linear displacement, corresponding points of the contact parts of the pawl means will approach each other.
  • the displacement system can be disengaged from this leg, whereupon by releasing said clamping means or said set of pawl means from engagement with the leg this leg can be freely lowered to for instance the sea bottom, whereupon by bringing said first set of pawl means into engagement the platform is permitted to move freely upward though not downward along the leg resting on the bottom due to the wave-action.
  • each pawl means is formed by a circumferential part of said pawl means varying in accordance with a change in the angular position of said pawl means, while upon a pivotal movement of said pawl means in the direction of the relative displacement to be inhibited, the distance between said circumferential part and the pivot point of said means increase.
  • each one of said sets of pawl means may comprise two pawl means mounted on opposite sides of a strip shaped element fastened to said other body.
  • the means for moving towards and/or apart from each other may be formed of a piston-cylinder assembly the cylinder of which being connected to the one and the piston of which being connected to the other pawl means at points near said contact parts.
  • Fig. 1 shows a front elevation of a device according to the invention as applied in a self-raising platform structure.
  • Fig. 2 shows the device according to Fig. 1 in side elevation, and
  • Fig. 3 shows said device in plan view.
  • a strip 1 As shown in the figures there is fastened a strip 1 to a leg 2 of a self-raising platform structure, said strip being parallel to the direction of relative displacement.
  • a first set of pawl means 4 and a second set of pawl means 3 are mounted for a pivotal movement to a yoke, said yoke 5 being mounted on the platform 6 of the structure.
  • the pawl means 3, 4 are in the shape of an ellipse of which a circumferential part close to the one focus is capable to engage the strip 1 so that when the pawl means 3 pivot towards each other in the direction of the one direction of relative displacement and when the pawl means 4 pivot towards each other in the other direction of relative displacement corresponding points of the contact parts of said pawl means approach each other.
  • the pawl means 3 are connected to each other by means of a pistoncylinder assembly 7, while the pawl means A- are connected to each other by means of a piston-cylinder-assembly 8.
  • the self-raising platform structure is moved to its destination in floating condition in which the legs 2 are kept in the retracted condition by means of the hydraulic displacement system.
  • the legs When arrived at its destination the legs may optionally first be lowered over a predetermined distance by means of the displacement system whereupon the pawl means 3 are brought into engagement with the strip 1 so that the displacement system can be disengaged from said leg.
  • the piston-cylinderassembly 7 By means of the piston-cylinderassembly 7 the pawl means 3 can be disengaged from the strip 1 whereupon the leg 2 drops freely to for instance the sea bottom so that the platform 6 remains in floating condition.
  • the pawl means 4 are brought Into engagement with the strip 1 by means of the pistoncylinder-assembly 8 so that the platform 6 due to the action of the waves may move freely upward along the leg 2 while it is prevented from moving downwardly when the platform 6 has reached its highest level in due course, said level being dependent on the highest wave movement, the displacement piston may be re-engaged for raising the platform to a still higher level. In this way it is excluded that there will occur any impact between the legs of the platform structure and the bottom due to the wave-action.

Abstract

A device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear displacement with respect to each other, in particular in a self-raising platform structure for coupling together the platform and a leg of said structure, said device comprising at least one set of first pawl means (3), each pawl of which is connected to one of said bodies for a pivotal movement and the contact parts thereof are shaped so that upon a pivotal movement of the pawl means towards each other in the direction of the one direction of relative linear displacement corresponding points of the contact parts approach each other, so that the relative movement between the bodies will be inhibited in this direction while being admitted in the other direction, at least one set of second pawl means (4) having the same construction as said set of first pawl means, and spaced apart from said set of first pawl means being provided, which are mounted for a pivotal movement in such a manner that upon a pivotal movement thereof towards each other in the direction of the other direction of relative linear displacement corresponding points of the contact parts of the pawl means will approach each other.

Description

A device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear movement with respect to each other.
The invention relates to a device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear movement with respect to each other, in particular, in a self-raising platform structure, for coupling to each other the platform and a leg thereof.
In case of two bodies mounted for a linear displacement with respect to each other, like for instance a dredging vessel and a spud pole, it is often desired that said bodies can be coupled in any position with respect to each other. In case of two bodies mounted for a linear movement with respect of each other by means of a stepwise operating, for instance hydraulic system, there is furthermore the problem that upon disengaging the system followed by a movement of the bodies re-engaging the system will only be possible at certain points of the path of movement. This problem is particularly acute in self-raising platform structures, wherein it will consequently not be well feasible to lower the legs of the platform freely into engagement with the aqueous bottom and then to re-engage the displacement system for raising the deck of the platform structure. In such a platform structure up til now the legs are therefore lowered by means of a stepwise operated displacement system in which, however, the problem arises that in passing from the floating condition to the supported condition of the platform the legs can come free from the bottom due to the action of the waves, whereupon the legs will again engage the bottom accompanied by an impact.
The object of the invention is to provide a device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear displacement with respect to each other, said device being particularly suited for use in a self-raising platform structure so that it will be possible to lower the legs freely to the aqueous bottom and to engage the displacement system without the occurrence of impacts.
This object is attained in that the device according to the inven tion comprises at least one set of pawl means, each pawl of which is pivotely connected to one of said bodies and is provided with a part capable of contacting the other one of said bodies, which pawl means are arranged at least on both sides of said other body and the pivot points of said pawl means are disposed in a plane extending transversely to the direction of displacement, while said pawl means are mounted for a pivotal movement and the contact parts thereof are shaped in such a manner that upon a pivotal movement of the pawl means towards each other in the direction of said one direction of relative linear displacement, corresponding points of the contact parts approach each other so that the relative movement between the bodies in this direction will be inhibited, while being allowed in the other direction, means being provided for making said pawl means to pivot towards and/or apart from each other as well as clamping means on the one body, said clamping means being operable to be brought into clamping engagement with said other body so that the relative displacement of the bodies with respect to each other is inhibited in at least the other direction.
Preferably said clamping means are formed by at least a second set of pawl means having the same construction as said first set of pawl means, and being spaced apart from sais first set of pawl means but which are mounted for a pivotal movement in such a manner that upon a pivotal movement thereof towards each other in the direction of the other direction of relative linear displacement, corresponding points of the contact parts of the pawl means will approach each other. When applying the device according to the invention in a selfraising platform structure in which the one body is formed by the plat form and the other body by a leg and when the clamping means or said second set of pawl means are brought into engagement with said leg, the displacement system can be disengaged from this leg, whereupon by releasing said clamping means or said set of pawl means from engagement with the leg this leg can be freely lowered to for instance the sea bottom, whereupon by bringing said first set of pawl means into engagement the platform is permitted to move freely upward though not downward along the leg resting on the bottom due to the wave-action. Advantageously the contact part of each pawl means is formed by a circumferential part of said pawl means varying in accordance with a change in the angular position of said pawl means, while upon a pivotal movement of said pawl means in the direction of the relative displacement to be inhibited, the distance between said circumferential part and the pivot point of said means increase.
In a simple embodiment each one of said sets of pawl means may comprise two pawl means mounted on opposite sides of a strip shaped element fastened to said other body. In that case the means for moving towards and/or apart from each other may be formed of a piston-cylinder assembly the cylinder of which being connected to the one and the piston of which being connected to the other pawl means at points near said contact parts.
The invention will now be elucidated further with reference to the drawings in which:
Fig. 1 shows a front elevation of a device according to the invention as applied in a self-raising platform structure. Fig. 2 shows the device according to Fig. 1 in side elevation, and Fig. 3 shows said device in plan view.
As shown in the figures there is fastened a strip 1 to a leg 2 of a self-raising platform structure, said strip being parallel to the direction of relative displacement. A first set of pawl means 4 and a second set of pawl means 3 are mounted for a pivotal movement to a yoke, said yoke 5 being mounted on the platform 6 of the structure. In the shown embodiment the pawl means 3, 4 are in the shape of an ellipse of which a circumferential part close to the one focus is capable to engage the strip 1 so that when the pawl means 3 pivot towards each other in the direction of the one direction of relative displacement and when the pawl means 4 pivot towards each other in the other direction of relative displacement corresponding points of the contact parts of said pawl means approach each other. The pawl means 3 are connected to each other by means of a pistoncylinder assembly 7, while the pawl means A- are connected to each other by means of a piston-cylinder-assembly 8.
The self-raising platform structure is moved to its destination in floating condition in which the legs 2 are kept in the retracted condition by means of the hydraulic displacement system. When arrived at its destination the legs may optionally first be lowered over a predetermined distance by means of the displacement system whereupon the pawl means 3 are brought into engagement with the strip 1 so that the displacement system can be disengaged from said leg. By means of the piston-cylinderassembly 7 the pawl means 3 can be disengaged from the strip 1 whereupon the leg 2 drops freely to for instance the sea bottom so that the platform 6 remains in floating condition. Thereupon the pawl means 4 are brought Into engagement with the strip 1 by means of the pistoncylinder-assembly 8 so that the platform 6 due to the action of the waves may move freely upward along the leg 2 while it is prevented from moving downwardly when the platform 6 has reached its highest level in due course, said level being dependent on the highest wave movement, the displacement piston may be re-engaged for raising the platform to a still higher level. In this way it is excluded that there will occur any impact between the legs of the platform structure and the bottom due to the wave-action.

Claims

C L A I M S
1. A device for coupling together two bodies in any position with respect to each other, which bodies are mounted for a linear displacement with respect to each other, in particular in a self-raising platform structure for coupling together the platform and a leg of said structure, said device comprising at least one set of pawl means, each pawl of which is pivotally connected to one of said bodies, which pawl means are arranged at least on both sides of said other body and the pivot points of which pawl means are disposed in a plane extending transversely to the direction of displacement, while said pawls means are mounted for a pivotal movement and the contact parts thereof are shaped in such a manner that upon a pivotal movement of the pawl means towards each other in the direction of said one direction of relative linear displacement corresponding points of the contact parts approach each other, so that the relative movement between the bodies will be inhibited in this direction while being admitted in the other direction, means being provided for making said pawl means to pivot towards and/or apart from each other as well as clamping means on the one body, said clamping means being operable to be brought into clamping engagement with said other body, so that the relative displacement of the bodies with respect to each other is inhibed in at least the other direction, c h a r a c t e r i z e d in that said clamping means are formed by at least a second set of pawl means having the same construction as said first set of pawl means, and being spaced apart from said first set of pawl means but which are mounted for a pivotal movement in such a manner that upon a pivotal movement thereof towards each other in the direction of the other direction of relative linear displacement corresponding points of the contact parts of the pawl means will approach each other.
2. A device according to claim, c h a r a c t e r i z ed in that the contact part of each pawl means is formed by a circumferential part of said pawl means varying with a change in the angular position of said means while upon a pivotal movement of the pawl means in the direction of the relative displacement to be inhibited the distance between said circumferential part and the pivot point of said means increases.
3. The device according to claim 1 or 2, c h a r a c t e r i z e d in that each set of pawl means comprises two pawl means located at opposite sides of a strip-shaped element connected to said other body.
4. The device according to claim 3, c h a r a c t e r i z e d in that said means for pivoting the pawl means towards and apart from each other are formed by a piston-cylinder-assembly, the cylinder of which is connected to the first pawl means and the piston of which is connected to said other pawl means at locations near to said contact parts.
PCT/NL1980/000022 1979-06-18 1980-06-17 A device for coupling together two bodies in any position with respect to each other,which bodies are mounted for a linear movement with respect to each other WO1980002853A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8080901227T DE3068014D1 (en) 1979-06-18 1980-06-17 A self-raising platform structure with a device for coupling together the platform and leg in any position with respect to each other

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7904738 1979-06-18
NL7904738A NL7904738A (en) 1979-06-18 1979-06-18 APPARATUS FOR COUPLING TWO LINEAR WITH EACH OTHER POSITION OF MOVABLE BODIES.

Publications (1)

Publication Number Publication Date
WO1980002853A1 true WO1980002853A1 (en) 1980-12-24

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ID=19833371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1980/000022 WO1980002853A1 (en) 1979-06-18 1980-06-17 A device for coupling together two bodies in any position with respect to each other,which bodies are mounted for a linear movement with respect to each other

Country Status (5)

Country Link
EP (1) EP0030540B1 (en)
DE (1) DE3068014D1 (en)
NL (1) NL7904738A (en)
NO (1) NO151836C (en)
WO (1) WO1980002853A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2868805A1 (en) 2013-10-30 2015-05-06 Overdick GmbH & Co. KG Lifting device with form-stable clamping element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU70057A1 (en) * 1974-01-31 1974-10-01
US3986368A (en) * 1975-05-27 1976-10-19 Levingston Shipbuilding Company Load equalizing and shock absorber system for off-shore drilling rigs
US4002038A (en) * 1975-10-06 1977-01-11 Raymond International Inc. Method and apparatus for rapid erection of offshore towers
FR2327188A1 (en) * 1975-10-07 1977-05-06 Anderson Ind Ab Paul PROCESS FOR SUPPORTING AN ARTICULATED ELEMENT INTENDED TO TRANSMIT SIGNIFICANT STRENGTHS AND BEARING FOR LEDIT ARTICULATED ELEMENT

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU70057A1 (en) * 1974-01-31 1974-10-01
US3986368A (en) * 1975-05-27 1976-10-19 Levingston Shipbuilding Company Load equalizing and shock absorber system for off-shore drilling rigs
US4002038A (en) * 1975-10-06 1977-01-11 Raymond International Inc. Method and apparatus for rapid erection of offshore towers
FR2327188A1 (en) * 1975-10-07 1977-05-06 Anderson Ind Ab Paul PROCESS FOR SUPPORTING AN ARTICULATED ELEMENT INTENDED TO TRANSMIT SIGNIFICANT STRENGTHS AND BEARING FOR LEDIT ARTICULATED ELEMENT

Also Published As

Publication number Publication date
EP0030540A1 (en) 1981-06-24
NO810536L (en) 1981-02-17
NO151836C (en) 1985-06-12
EP0030540B1 (en) 1984-05-30
DE3068014D1 (en) 1984-07-05
NO151836B (en) 1985-03-04
NL7904738A (en) 1980-12-22

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