EP0173968A2 - Bôme à longueur variable pour planche à voile - Google Patents

Bôme à longueur variable pour planche à voile Download PDF

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Publication number
EP0173968A2
EP0173968A2 EP85110894A EP85110894A EP0173968A2 EP 0173968 A2 EP0173968 A2 EP 0173968A2 EP 85110894 A EP85110894 A EP 85110894A EP 85110894 A EP85110894 A EP 85110894A EP 0173968 A2 EP0173968 A2 EP 0173968A2
Authority
EP
European Patent Office
Prior art keywords
pin
front part
boom according
recess
lever element
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Withdrawn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
EP85110894A
Other languages
German (de)
English (en)
Other versions
EP0173968A3 (fr
Inventor
Walter Dr. Knabel
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.)
AKUTEC Angewandte Kunststofftechnik GmbH
Original Assignee
AKUTEC Angewandte Kunststofftechnik GmbH
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 AKUTEC Angewandte Kunststofftechnik GmbH filed Critical AKUTEC Angewandte Kunststofftechnik GmbH
Publication of EP0173968A2 publication Critical patent/EP0173968A2/fr
Publication of EP0173968A3 publication Critical patent/EP0173968A3/fr
Withdrawn legal-status Critical Current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
    • B63H8/00—Sail or rigging arrangements specially adapted for water sports boards, e.g. for windsurfing or kitesurfing
    • B63H8/20—Rigging arrangements involving masts, e.g. for windsurfing
    • B63H8/21—Wishbones

Definitions

  • the invention relates to a length-adjustable boom for a rig of a sailing board with a front part which can be attached to the mast and has approximately V-shaped connected pipes and an end part which at least partially carries a trim and slip arrangement and has an approximately V-shaped connected pipe parts, the end sections of the End part can be inserted into the end sections of the front part, and with a connecting device for fixed but releasable connection of the respective end sections.
  • a boom for a sail board conventionally has two curved forks consisting of tubes or rods, which are connected to one another at the two ends in an approximately V-shape.
  • One end can be attached to the mast of the sail board, for example by means of a mast sleeve or by means of a mast sheet.
  • a trim and Bele g arrangement in which by means of an outhaul the sail of the sailing board is trimmed at its clew.
  • the trim sheet is attached to the boom at one end, guided over an eyelet in the clew and fixed at the other end after deflection via a slip clamp.
  • sails of different sail areas are used. So that the distance between the clew of the sail and the outer end of the boom is not too large, which is unfavorable for maneuvering, previously several booms had to be used with different distances between the two ends.
  • the two Forks of the boom are divided and each form an approximately V-shaped front part or an approximately V-shaped end part.
  • the front part can be attached to the mast on the connecting part of the two fork sections; the two tubular fork sections point in the direction of the clew.
  • the end part also has a connection point between the two remaining fork sections, essential parts of the trim and slip arrangement being provided at the connection point.
  • the end sections of the end part can be inserted into the end sections of the front part and can be fixed in the desired position.
  • the at least one slip clamp for the trim sheet can be provided both on the end part and on the front part.
  • connection between the end sections could take place, for example, via a clamp connection, but difficulties arise here, since the forces occurring during trimming and sailing are very high and the connection must be such that these forces do not cause any displacement of the end sections against one another.
  • a connection is therefore commercially available, which essentially consists in the openings being drilled in alignment with one another in the end sections, through which a pin is inserted which is secured by means of a split pin.
  • a plastic sleeve can be pushed over to protect the outside.
  • the trim sheet must at least be loosened, the pin locks removed and the pins pulled out. These can be lost very easily, especially if it is a sandy beach.
  • the preparation of the compound requires high concentration.
  • the end section of the front part carries a lever element, one lever arm of which carries at least one pin, which engages in a pivot position of the lever element in an opening or a recess in the end section of the end part and which in the other pivot position of the lever element except Engagement with the opening or the recess comes.
  • the invention is based on the knowledge that, on the one hand, a pivotable element which is fixedly provided on the boom cannot be lost and, on the other hand, allows easy handling without considerable concentration.
  • the pin engages in the first pivoting position, wherein the pin can have a recess into which an edge of the opening which the pin penetrates engages when the sail is trimmed.
  • the lever element can be designed and arranged in different ways, details are given in the subclaims.
  • Fig. 1 shows a rig 1 for a sail board 2, which has a mast 3 which is inserted into the mast pocket 4 of a sail 5.
  • the mast has a mast shoe 6, which is adjustable in height in relation to a mast foot 7.
  • the sail neck 8 of the sail 5 is connected with the aid of a luff stretcher 9 in the usual way to a trim and slip arrangement 10 on the mast shoe 6 or mast foot 7 for trimming the sail 5.
  • the mast foot 7 is fixed but detachably connected to the sail board 2 in the usual way.
  • the mast pocket 4 has mast pocket openings 11, in the area of which a boom 12 can be attached to the mast 3 with the aid of a mast mast 13 or a mast sleeve.
  • the boom 12 has a slip and trim arrangement 14, by means of which a trim sheet 15 is used the clew 16 of the sail 5 is trimmable.
  • the boom 12 is formed in two parts and has a front part 17 and an end part 18.
  • the front part 17 is attached to the mast and has two tubular end sections 19 projecting in the direction of the clew 16.
  • the front part 17 is thus essentially V-shaped.
  • the end part 18 is also V-shaped and has two end sections 20 which protrude in the direction of the mast 3.
  • the end sections 2o of the end part / can be inserted into the end sections 19 of the front part 17 and are connected there firmly but releasably by means of a connecting device 21. It should be noted that the loading le gklemme the trim and slip assembly 14 at both the end portion 19 and may be provided at the end portion 2o.
  • connection means 14 has firstly a sleeve 22 which at the end of the end portion 19 of the front part 17 is fastened.
  • the attachment can be clamped, however, as shown, the end of the end section has an indentation 23.
  • a blind rivet 24 or a countersunk rivet (not shown) firmly connects the sleeve 22 and the end section 19 to one another in the region of the shape 23.
  • the sleeve can cover the handle coating 25 as shown.
  • the sleeve 22 does not necessarily have to surround the end section 19 over its entire longitudinal extent, rather it is sufficient if the sleeve 22 in the region of the stamping 23 surrounds the end portion for connection to the end portion 19.
  • the sleeve on the section opposite the fastening has two webs 26, 27 lying parallel to a plane parallel to the axis of the end section 19 or the sleeve 22.
  • a lever element 28 is pivotally mounted via an indicated axis 29.
  • the lever element 28 has two lever arms 3o and 31. At least the lever arm 3o on the mast has corrugations on the outside to enable better actuation.
  • the other, outer lever arm 31 has near its outer end a pin 32 which also penetrates the sleeve.
  • the pin is riveted in the lever arm 31.
  • the pin 32 (cf. FIG. 2) has a neck section 33 which penetrates a corresponding opening in the lever arm 31.
  • the neck section has at least one guide surface so that the pin 32 is non-rotatably fastened in the lever arm 31 for the reasons explained below.
  • the head 34 of the pin 32 can be deformed in the usual way in the manner of a rivet (cf. FIG. 4).
  • a washer 35 can be provided between the riveted head and the lever arm 31.
  • the pin 32 has a recess 36 near its lower end.
  • the recess 36 is shaped (see FIG. 3) in such a way that its radius corresponds to the radius of the rest of the pin section, the origin of the radius being offset by a distance 1 from that of the rest of the pin.
  • the pin 32 is arranged in the lever arm 31 in such a way that the recess 36 points outwards, ie in the direction of the end section 20 of the end part 18.
  • the pin first passes through an opening 37 in the end section 19 of the front part 17 and passes through in the assembled state shown State also an opening 38 in the end section 20 of the end part 18.
  • the radius, in particular the opening 38 is dimensioned such that it essentially corresponds to the radius r of the pin 32 or its recess 36.
  • the trim sheet must first be loosened. Only then can the pin 32 be released from engagement with the edge of the opening 38 by pivoting the lever element 28 into the other (not shown) pivot position. Only then can the end part 18 be detached from the front part 17.
  • the lever element 28 is expediently under spring tension such that the lever element 28 is in the rest position in the first pivot position shown. This simplifies the assembly of the two parts 17, 18, since the pin 32 engages in the nearest opening 38 and temporarily fixes it until the final fixation when the sail 5 is trimmed is reached.
  • a disk-shaped seal 39 is provided in the area of the opening 38 within the tube of the end section 20 of the end part 18, which has a recess 4o, at least in the area of the opening 28, which is dimensioned such that the pin 32 in the first Swing position can intervene unhindered.
  • the seal 39 can also be annular. Such a seal is particularly important when a plurality of openings 38 are provided over the longitudinal extent of the end sections 20 of the end part 18 in order to to be able to reach booms 12 of different lengths with the aid of a single end part 18. This is necessary so that water does not penetrate into the interior of the boom, which is a considerable disadvantage when the rig is pulled out of the water.
  • This sealing effect can also be achieved if, instead of the openings 38, correspondingly shaped depressions in the form of impressions are provided in the end section 20. However, the locking when trimming must then be achieved in a different way.
  • the recess 36 in the pin 32 faces the end section 19 of the front part 17, i.e. the mast 3.
  • the sleeve 22 or the lever element 28 must then be designed so that it can be pushed in the direction of the end section at least over a slight distance so that the edge of the opening 37 facing the recess 50 in the end section 19 of the front part 17 in the trimmed state into the recess 36 of the pin 32 can engage and thereby lock the two sections firmly together.
  • a spring force is exerted according to arrow 41, which acts in the direction of the first pivoting position of the lever element.
  • the embodiment according to FIG. 8 also differs in that the underside 42 of the pin 32 is chamfered, and in that the depression 4o in the end section 2o of the end part 18 is designed accordingly in such a way that the edge 43 of the depression 4o facing away from the mast can come into close contact with the pin, while the mast-facing flank of the recess 4o can be pulled out along the inclined underside 42 when the end section 2o of the end part 18 is pulled out of the end section 19 of the front part 17. This allows the end part 18 from the front part 17 pulled, but not pushed in without operating the lever element.
  • Fig. 7 shows an embodiment in which no separate sleeve is required. Rather, in the exemplary embodiment according to FIG. 7, a lever element 45 is provided, which essentially consists of a half ring 46, which surrounds the end section 19 of the front part 17 and carries the pin 32 schematically indicated in dashed lines in the center. At both ends, the half ring 46 carries an arm 47, which is pivotally connected at the other, free end 48 to the end section 19 of the front part 17 via an axis 49, such as a rivet or the like.
  • the pin 32 can be designed such that, in the trimmed state, the edge of the opening 38 in the end section 20 of the end part 18 engages in the recess 36 of the pin 32.
  • the pin 32 can also be arranged displaceably in the direction of the mast 3 such that, in the trimmed state, the edge of the opening 37 in the end section 19 of the front part 17 engages in a recess in the pin 32, as explained with reference to FIG. 8 has been.
  • the sleeve 22 and the lever element 28 or the lever element 45 expediently consist of a suitable plastic, while the pin 32 is made of corrosion-resistant metal, such as VA steel.
  • the tubes of the boom 12 are usually made of aluminum.
  • the various openings 38 in the end section 20 of the end part 18 can be assigned markings which are to be assigned to the length of the boom 12 formed in each case.
  • this connecting device can also be used for other connections of tubular elements, in particular for sails boards is suitable.
  • Such a connection is possible between the mast 3 and the mast base 7 or between the mast shoe 6 of the mast 3 and the mast base 7 if it is a height-adjustable mast base.
  • the neck of the mast foot 7 corresponds to the end section 20 of the end part 18 which has at least one opening 38.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Surgical Instruments (AREA)
EP85110894A 1984-09-05 1985-08-29 Bôme à longueur variable pour planche à voile Withdrawn EP0173968A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3432667 1984-09-05
DE3432667 1984-09-05

Publications (2)

Publication Number Publication Date
EP0173968A2 true EP0173968A2 (fr) 1986-03-12
EP0173968A3 EP0173968A3 (fr) 1986-11-05

Family

ID=6244724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110894A Withdrawn EP0173968A3 (fr) 1984-09-05 1985-08-29 Bôme à longueur variable pour planche à voile

Country Status (1)

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EP (1) EP0173968A3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294839A1 (fr) * 1987-06-12 1988-12-14 Hannes Marker Wishbone de longueur réglable
EP0698549A1 (fr) * 1994-08-23 1996-02-28 Fanatic Sports GmbH Wishbone à longueur réglable pour planches à voile
ITPD20130206A1 (it) * 2013-07-24 2015-01-25 Manfrotto Lino & C Spa Dispositivo di fissaggio accoppiabile ad un supporto con attacco a codolo

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB310584A (en) * 1928-02-10 1929-05-02 Frederick Sage And Company Ltd Improvements in or relating to display stands and the like
DE3125806A1 (de) * 1981-06-30 1983-01-13 Hannes 8100 Garmisch-Partenkirchen Marker Laengenverstellbarer gabelbaum
EP0071220A1 (fr) * 1981-07-27 1983-02-09 Mistral Windsurfing AG Wishbone pour planche à voile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB310584A (en) * 1928-02-10 1929-05-02 Frederick Sage And Company Ltd Improvements in or relating to display stands and the like
DE3125806A1 (de) * 1981-06-30 1983-01-13 Hannes 8100 Garmisch-Partenkirchen Marker Laengenverstellbarer gabelbaum
EP0071220A1 (fr) * 1981-07-27 1983-02-09 Mistral Windsurfing AG Wishbone pour planche à voile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294839A1 (fr) * 1987-06-12 1988-12-14 Hannes Marker Wishbone de longueur réglable
WO1988009743A1 (fr) * 1987-06-12 1988-12-15 Hannes Marker Bome fourchue reglable en longueur
EP0698549A1 (fr) * 1994-08-23 1996-02-28 Fanatic Sports GmbH Wishbone à longueur réglable pour planches à voile
US5584259A (en) * 1994-08-23 1996-12-17 Fanatic Sports Gmbh Lengthwise adjustable forked boom for surfboards
DE19509758C2 (de) * 1994-08-23 1998-10-29 Fanatic Sa Längenverstellbarer Gabelbaum für Surfbretter
ITPD20130206A1 (it) * 2013-07-24 2015-01-25 Manfrotto Lino & C Spa Dispositivo di fissaggio accoppiabile ad un supporto con attacco a codolo

Also Published As

Publication number Publication date
EP0173968A3 (fr) 1986-11-05

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Inventor name: KNABEL, WALTER, DR.