EP0765806A1 - Rollbaum-Reffer für Grosssegel - Google Patents

Rollbaum-Reffer für Grosssegel Download PDF

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Publication number
EP0765806A1
EP0765806A1 EP96402000A EP96402000A EP0765806A1 EP 0765806 A1 EP0765806 A1 EP 0765806A1 EP 96402000 A EP96402000 A EP 96402000A EP 96402000 A EP96402000 A EP 96402000A EP 0765806 A1 EP0765806 A1 EP 0765806A1
Authority
EP
European Patent Office
Prior art keywords
mast
profiled element
boom
fixed
groove
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.)
Granted
Application number
EP96402000A
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English (en)
French (fr)
Other versions
EP0765806B1 (de
Inventor
Pierre Clausin
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.)
Proengin SA
Original Assignee
Proengin SA
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
Priority claimed from FR9511589A external-priority patent/FR2739350B1/fr
Priority claimed from FR9608986A external-priority patent/FR2751295B1/fr
Application filed by Proengin SA filed Critical Proengin SA
Publication of EP0765806A1 publication Critical patent/EP0765806A1/de
Application granted granted Critical
Publication of EP0765806B1 publication Critical patent/EP0765806B1/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
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/08—Connections of sails to masts, spars, or the like
    • B63H9/10—Running rigging, e.g. reefing equipment
    • B63H9/1021—Reefing
    • B63H9/1042—Reefing by furling around or inside the boom

Definitions

  • the present invention relates to a winder-reducing sail for mainsail mounted in or on the boom, used in sailing boats.
  • the winding-reducing canopies mounted on the boom comprise a tubular element extending parallel to the boom, and rotatably mounted so as to allow the winding or unwinding of the mainsail, the latter being fixed to the mast by means of a rope which slides in the groove of a profile extending all along the mast.
  • the boom has a tubular structure housing the furling tube, this structure being open in its upper part by a longitudinal slot, to allow passage of the sail.
  • the drive device generally consists of a coaxial drum and integral with the winding tube, around which comes to wind the operating cord of the reel, this drum, of a certain thickness, being installed at one end of the boom. If the drum is mounted on the side of the end of the boom fixed to the mast, the part of the sail located near the boom, and therefore the corresponding part of the rope, must be separated from the mast by a distance corresponding to the thickness of the drum, which causes a deformation of the sail which increases when the latter is wound and which makes the folds inevitable at the end of the winding.
  • the headline exerts a force on the lips of the lower opening of the throat, making the unfolding of the sail more difficult, or even impossible if the headline gets stuck between the lips.
  • Another solution consists in using a notched pulley of small thickness compared to the drum, also coaxial and integral with the winding tube, which is placed at the end of the boom fixed to the mast.
  • two pulleys are used which bring the rope against the toothed pulley, and two pulleys which orient the two strands of the maneuvering rope towards another toothed pulley actuated by means of 'a crank.
  • the rope must also be kept taut, which is difficult to ensure in particular because of the variations in the length of the rope depending on whether it is dry or wet. This results in high friction forces inherent in the toothed pulleys, and due to the large number of pulleys used, and poor reliability due to the risks of slippage of the rope which therefore wears out quickly.
  • the groove holding the rope is not located directly above the rope winding zone around the winding tube.
  • the headline therefore exerts friction forces on the lips of the lower end of the throat and tends to get caught between them if the rope is subjected to a high tension.
  • the sail is subjected to the action of the wind, there is also exerted significant friction forces between the luff of the sail and the throat, which makes it difficult to slide the luff in the throat.
  • the action of the wind on the sail tends to draw the lips away from the throat.
  • this groove is made of an insufficiently rigid material, the headline will tend to come out of the throat by spreading the lips and to be wedged between the latter.
  • the sail is not in the axis of the throat, it also rubs on a lip of the throat, which further slows down, or even prevents, the sliding of the headline in the throat.
  • winders of this kind involve the use of sails with few hollows to avoid deformation and the appearance of folds when reducing the airfoil. It turns out that such sails have lower bearing performance than conventional sails forming a larger hollow. These performances are further degraded when the headline of the sail is not parallel to the mast because of the reel drive device.
  • the object of the present invention is in particular to reduce the frictional forces generated during the winding and unwinding operations of the sail and to avoid the degradation of the performance of the sail due to the use of a winder-reducer.
  • mainsail winder-reducer comprising a winder tube mounted to rotate parallel to the boom and a means for driving the winder tube in rotation, mounted coaxially at the end of the latter located on the side of the end of the boom fixed to the mast, the mainsail being slidably mounted on the mast by means of a rope connected to the sail sliding in a groove extending all along the mast.
  • this reel is characterized in that the groove is made in a profiled element fixed parallel and at a distance from the mast so as to form a slot between said profiled element and the mast, and so that the groove is located at directly above the headline winding area around the take-up tube.
  • the forces exerted by the rope on the throat during the maneuvers of the reel have been reduced considerably. If the reel drive means consists of a drum around which a maneuvering cord is wound, a single pulley is necessary to bring the maneuvering cord towards the cockpit of the boat. Thus, the friction forces which oppose the maneuvers of the reel have been significantly reduced.
  • the profiled element is pivotally mounted on supports fixed to the mast and is fixed to the boom so that the opening of the groove is maintained in the axis of the boom whatever the orientation of it.
  • the sail is substantially always centered between the two lips of the throat whatever the orientation of the boom.
  • the friction forces of the sail on the lips of the throat are therefore practically eliminated, which makes it even easier to maneuver, in particular, to wind the sail, regardless of the direction of the wind relative to to the boat.
  • the device comprises two pulleys secured to the profiled element, placed at the top of the mast, the groove of the first pulley being placed tangentially to the axis of rotation of the profiled element, while the second pulley is placed so as to bring the halyard in line with the eyelet for fixing the halyard to the mainsail.
  • the profiled element is provided of a rope guide placed at the entrance to the groove and comprising two rollers mounted to rotate about a common axis perpendicular to the plane of the sail, arranged on either side of the sail so as to guide the rope in the axis of the throat opening.
  • the canopy winder-reducer according to the invention is mounted inside the boom 1 which consists of a tubular element 13 closed at each of its ends by tubular covers 4, 5 fixed to the tubular element 13, for example by means of pop rivets.
  • a slot 3 extending all along the upper part of the tubular element 13 allows the passage of the mainsail 10.
  • the tubular element 13 closes the winder-reducer proper comprising a winder tube 2 or mandrel substantially coaxial with the tubular element 13 around which the mainsail is wound, the roller tube 2 being mounted to rotate along its longitudinal axis by means of two bearings 6,7 arranged at its two ends.
  • the tubular element 13 also comprises a coaxial drum 8 allowing it to be driven in rotation by means of an operating cord 9 of the reel, this drum 8 being fixed to the end of the reel tube 2 situated on the side of the mast 11. From this so only a pulley 35 is necessary to bring the maneuvering line 9 towards the rear of the boat where the cockpit is located. This significantly limits the friction forces opposing the winding or unwinding operations of the mainsail.
  • the headline 34 is threaded into the longitudinal groove 17,18 of a profiled element 20 which is fixed to the mast 11 by means of support pieces 23,24 so as to leave a slot 12 between the mast 11 and the profiled element 20.
  • the profiled element 20 is kept at a distance from the mast 11 so that the line part 34 of the part of the deployed sail is always in line with the portion of rope around the take-up tube 2.
  • the profiled element 20 is pivotally fixed to the support pieces 23, 24 by means of connecting pieces 33, while being subject to the movements of the boom 1 in a plane perpendicular to the mast 11.
  • the slot 16 for opening the groove 17, 18 of the profiled element 20 always remains oriented along the longitudinal axis of boom 1, regardless of the angle formed between boom 1 and the longitudinal axis of the boat. This eliminates the friction forces exerted between the groove and the sail when the latter is not exactly in the axis of the groove slot.
  • the mainsail 10 is sent by means of a halyard 25 maneuvered from the cockpit, the halyard being brought to the headrest 32 of the mainsail by means of a first pulley 36 which guides the halyard towards the inside of the mast 11, and a second pulley 28 located at the head of the mast which brings the halyard from the inside of the mast directly above the fixing eyelet provided in the headrest 32.
  • the halyard 25 is no longer in line with the eyelet for fixing the headrest 32.
  • a set of two pulleys 30, 31 is used, for example mounted in a housing 29, the groove of the first pulley 31 being placed tangentially to the axis of rotation 37 of the profiled element 20 so as to orient the halyard 25 from the pulley 28, in a direction parallel to that of the boom 1, and the second pulley 30 orienting the halyard from the pulley 31 in the direction of the fixing eye of the headrest 32.
  • the profiled element 20 has for example an external shape of elliptical section comprising two flattened lateral flanks 43, 44 ending on one side, with a solid edge (leading edge 15) and on the other side, by a longitudinal slot 16 giving access to two internal longitudinal grooves 17,18, each serving to receive the headline 34 of the mainsail 10.
  • transverse partition 21 which divides the interior volume of the profiled element into two compartments 52, 53 one of which opens out through the slot 16, and by a radial partition 14 which stretches from the central part of the partition 21, in the direction of the slot 16, delimiting the two grooves 17,18.
  • the internal wall of the profiled element 20 comprises two internal ribs 26, 27 which are symmetrical with respect to a longitudinal median plane of symmetry of the profiled element 20, in the vicinity of the leading edge 15.
  • a longitudinal rib 58 of trapezoidal section extends over the entire length of the central part of the transverse partition 21, projecting into the compartment 52.
  • the wall of the profiled element 20 is reinforced so as to form, on the inside, a longitudinal flat 19.
  • the profiled element 20 is in fact made up of several sections assembled at the level of the connection pieces 33 pivotally mounted on the support pieces 23, 24.
  • the connecting pieces 33 have an elliptical cross section substantially identical to that of the profile element 20, apart from the fact that their leading edge has an extension provided with a longitudinal through hole in which engages a axis of attachment to the support piece 24.
  • the connecting piece 33 can pivot in a plane perpendicular to the mast 11, and comprises a groove ensuring continuity between the respective grooves 17,18 of two sections of the profiled element 20 connected to it.
  • a splint 41 of tubular shape whose external shape corresponds, to within a clearance, to the shape of the compartment 52 and whose internal shape 22 is for example cylindrical.
  • the splint 41 therefore has a convex shape 68 which corresponds to the internal shape of the leading edge 15.
  • a protuberance 63 is provided substantially in the central region of the flat part 68 to axially position the splint 41 in the lower section of the profiled element 20.
  • the splint 41 is engaged first of all in the compartment 52 of the lower section until the protuberance 63 comes to engage in a notch (not shown on the figures) provided for this purpose in the upper edge of the lower section, thereby ensuring an axial locking of the splint 41. In this position, less than half of the splint 41 is engaged in the lower section, the other part protruding axially.
  • tapped holes 72,73 suitably provided in the sections of the profiled element 20
  • screws 74,75 are screwed ensuring the locking of the splint in the sections of the profiled element 20.
  • the boom 1 is suspended from the support part (mullet gear) 23 so as to be able to pivot both in a plane perpendicular to the mast and in the direction of the mast.
  • the upper part of the cover 5 constituting the fixed end of the boom 1 includes a boss 48 provided with two flat faces parallel to the plane located in the axis of the boom and of the mast 11.
  • a yoke 45 comprising on a face two cheeks coming to engage on either side of the two parallel faces of the boss 48, is pivotally mounted by means of an axis 50 engaged in a hole passing successively through one of the two cheeks, the boss 48 of one of the two faces parallel to each other, then the second cheek of the yoke 45.
  • This yoke comprises two axes 42, 49 extending perpendicular to its other face in the direction of the top of the mast 11.
  • the first axis 42 engages in a bore parallel to the mast 11 of the support piece 23 and comprises a threaded upper end intended to receive a nut 47.
  • the boom 1 is pivotally suspended from the support piece 23, and the yoke 45 follows the rotational movements of the boom 1 in the plane perpendicular to the mast 11.
  • the second axis 49 spaced from the first axis 42 towards the free end of the boom 1, engages in the cylindrical cavity 22 of a splint 41 'of identical shape to the splint 41, which comes to its turn engage and fix in the cavity 52 of a section of the profiled element 20 supporting the retaining groove of the rope 34 of the mainsail 10.
  • the profiled element 20 is slaved to the movements of the boom 1 in a plane perpendicular to the mast, so that the sail passage slot 16 is maintained in the axis of the boom.
  • Figures 6A and 6B show the shape of the air streams around the profiles of the mast 11 and the mainsail 10,10 '. If we compare the shape of the air streams on these two figures, it can be seen that the turbulent zones, responsible for the drag and therefore the poor performance of the mainsail (represented by air streams in the form of ellipses) are much more reduced in the presence of the slot 12 (FIG. 6B) than in the absence of a slot ( Figure 6A). Furthermore, the air streams are more flat against the upper surface of the sail and closer to the mast in FIG. 6B than in FIG. 6A. Thus, thanks to the slot 12, the mast behaves like a leading edge flap on an aircraft wing.
  • FIG. 7 shows the curves C1, C2 of the lift Cz as a function of the drag Cx, for angles between the axes of boom 1 and of the boat varying from 0 to 12 degrees. These curves were obtained by using a sail area and a slit equal to the sail area without a slit.
  • the rope guide 80 comprises a substantially U-shaped part which follows the external shape of the profile 20 to which it is fixed, for example, by four rivets 88.
  • the rope guide 80 comprises two bearings 82, 83 coaxial supported respectively by the branches of the U-shaped piece 81, and two cylindrical rollers 84, 85 kept freely rotatable about a common axis, between the branches of the piece 81 by the bearings 82, 83, the parallel faces and opposite the two rollers being separated by a space e allowing the free movement of the sail 10, the headline 34 adjoining the sail coming to bear on the cylindrical periphery of the rollers of diameter D, and causing the latter to rotate.
  • the bearings 82, 83 of cylindrical shape are for example provided with an external thread which cooperates with a tapping provided in the branches of the U-shaped part, so as to allow precise positioning of the bearings 82, 83, and consequently , rollers 84, 85, so that the slot between them in which passes the sail 10 is located in the axis of the slot 16 of the groove 17, and so that the spacing e between them is adjusted to the thickness of the sail 10 used.
  • Such a rope guide eliminates any wear, braking or risk of jamming the rope.
  • any other embodiment of the rope guide is included in the invention, insofar as it involves two coaxial and rotary rollers, between which the sail passes, and driven in rotation by contact of the rope around their periphery. .

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Jib Cranes (AREA)
  • Wind Motors (AREA)
EP96402000A 1995-09-29 1996-09-19 Rollbaum-Reffer für Grosssegel Expired - Lifetime EP0765806B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9511589A FR2739350B1 (fr) 1995-09-29 1995-09-29 Enrouleur-reducteur de voilure pour grand-voile
FR9511589 1995-09-29
FR9608986A FR2751295B1 (fr) 1996-07-16 1996-07-16 Perfectionnement apporte aux guides ralingues
FR9608986 1996-07-16

Publications (2)

Publication Number Publication Date
EP0765806A1 true EP0765806A1 (de) 1997-04-02
EP0765806B1 EP0765806B1 (de) 2000-04-05

Family

ID=26232240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402000A Expired - Lifetime EP0765806B1 (de) 1995-09-29 1996-09-19 Rollbaum-Reffer für Grosssegel

Country Status (6)

Country Link
US (1) US5697314A (de)
EP (1) EP0765806B1 (de)
AU (1) AU714322B2 (de)
DE (1) DE69607550T2 (de)
DK (1) DK0765806T3 (de)
NZ (1) NZ299451A (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPO275096A0 (en) * 1996-07-25 1996-10-31 Brookes, Thomas Joseph Furling boom
US6371037B1 (en) 2000-12-26 2002-04-16 Fred C. Cook Sail furling system
US7396207B2 (en) * 2004-09-14 2008-07-08 Delong Dee James Wind turbine
US7918175B2 (en) * 2007-09-20 2011-04-05 Steven Daniel Orlebeke Mast track extension and pre-feeder for mainsail furling
AT505951B1 (de) * 2007-10-16 2009-08-15 Kurt Waldhauser An- und abkoppelungsverfahren zwischen dem vorliek eines segels und mastführungswägen
US8091496B2 (en) * 2009-05-07 2012-01-10 Schaefer Marine, Inc. Mast track with external headboard car
US8001916B2 (en) * 2009-05-07 2011-08-23 Schaefer Marine, Inc. Mega yacht mast tracking system with articulating sail feeder
US8091497B2 (en) * 2009-05-07 2012-01-10 Schaefer Marine, Inc. Sectionalized mast track
GB0922067D0 (en) * 2009-12-17 2010-02-03 Tradewind Turbines Ltd Improvements in vertical axis wind turbines
US8973512B2 (en) 2012-01-24 2015-03-10 Gilbert D. Dunn Wind gust dampening system for sailing vessel
WO2014197912A1 (en) * 2013-06-07 2014-12-11 3 Phase Energy Systems, Inc Wind generator with lightweight adjustable blades
US10422317B2 (en) * 2013-06-07 2019-09-24 Peter Agtuca Advertising horizontal axis wind generator
JP6373156B2 (ja) * 2014-10-14 2018-08-15 株式会社大内海洋コンサルタント コンテナ船の舷側風防装置及び舷側風防方法
US9783276B2 (en) 2015-09-10 2017-10-10 Stephen Colgan Clement Sailing furler and method
US20190176947A1 (en) * 2017-12-07 2019-06-13 Guy Charlton Headsail roller-furling boom
CN113071645B (zh) * 2021-04-12 2022-05-27 重庆交通大学 一种基于仿生蝙蝠理念的可伸缩桅杆风帆

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132620A (en) * 1960-01-11 1964-05-12 Andrew T Court Sailboat
DE2815264A1 (de) * 1978-04-08 1979-10-18 Hoecker Stahlbau Kg Karl Vorrichtung zum einfuehren des keders eines segels in die kedernut eines segelmastes
GB2091190A (en) * 1980-12-17 1982-07-28 Francis Bertram Frederick Securing device
US4679520A (en) * 1985-06-10 1987-07-14 Harken Olaf T Mainsail reefing and furling device and method
FR2609273A1 (fr) * 1987-01-05 1988-07-08 Monti Michel Enrouleur de grand'voile
WO1990004539A1 (en) * 1987-08-28 1990-05-03 Rutgerson Marin Ab Arrangement for sails

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2586997B1 (fr) * 1985-09-11 1990-10-19 Plastimo Dispositif d'enroulement d'une voile d'un navire sur une bome

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132620A (en) * 1960-01-11 1964-05-12 Andrew T Court Sailboat
DE2815264A1 (de) * 1978-04-08 1979-10-18 Hoecker Stahlbau Kg Karl Vorrichtung zum einfuehren des keders eines segels in die kedernut eines segelmastes
GB2091190A (en) * 1980-12-17 1982-07-28 Francis Bertram Frederick Securing device
US4679520A (en) * 1985-06-10 1987-07-14 Harken Olaf T Mainsail reefing and furling device and method
FR2609273A1 (fr) * 1987-01-05 1988-07-08 Monti Michel Enrouleur de grand'voile
WO1990004539A1 (en) * 1987-08-28 1990-05-03 Rutgerson Marin Ab Arrangement for sails

Also Published As

Publication number Publication date
DE69607550T2 (de) 2000-09-21
DK0765806T3 (da) 2000-10-23
AU714322B2 (en) 2000-01-06
EP0765806B1 (de) 2000-04-05
AU6575796A (en) 1997-04-10
DE69607550D1 (de) 2000-05-11
US5697314A (en) 1997-12-16
NZ299451A (en) 1998-02-26

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