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EP0198261B1 - Wishbone - Google Patents

Wishbone Download PDF

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Publication number
EP0198261B1
EP0198261B1 EP86103785A EP86103785A EP0198261B1 EP 0198261 B1 EP0198261 B1 EP 0198261B1 EP 86103785 A EP86103785 A EP 86103785A EP 86103785 A EP86103785 A EP 86103785A EP 0198261 B1 EP0198261 B1 EP 0198261B1
Authority
EP
European Patent Office
Prior art keywords
boom
mast
clamp
wishbone
head
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
Application number
EP86103785A
Other languages
German (de)
English (en)
Other versions
EP0198261A1 (fr
Inventor
Christian Greiff
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86103785T priority Critical patent/ATE39892T1/de
Publication of EP0198261A1 publication Critical patent/EP0198261A1/fr
Application granted granted Critical
Publication of EP0198261B1 publication Critical patent/EP0198261B1/fr
Expired 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
    • B63H8/22—Rigging arrangements involving masts, e.g. for windsurfing for connecting wishbones to the mast

Definitions

  • the invention relates to a boom for a sailing vehicle of the type specified in the preamble of claim 1.
  • the fork boom with its outwardly bent forks is usually attached to the mast of the sail or windsurfer with the help of a so-called mast mast, which is tied around the mast and the boom head.
  • the free end of the mast tamping is fixed in a so-called slip clamp on one of the forks after securing the boom and secured by a knot.
  • a reliable and permanent connection of the boom to the mast with the help of a tamp requires a high degree of skill, material knowledge and strength. Especially inexperienced windsurfers rarely succeed in creating a permanent, firm connection with the help of a tampon. Either the connection is too loose from the start, or a connection that is initially quite firm loosens during the course of surfing because the rope gives in under the load and the fork boom loosens, even if the rope has been watered beforehand. Because the boom connection loosens during the course of surfing, the belly in the sail is enlarged and the sail needs to be trimmed. As a result of the loosening of the connection, the vertical play of the forks also increases and the boom gains play about its longitudinal axis, which makes exact sailing difficult.
  • the mast is heavily stressed by the tilting play of the boom and is permanently damaged.
  • the inadequate connection of the boom to the mast will be loosened to such an extent that the boom will slide along the mast when catching up on the sail and a new connection of the tamping and a new trimming of the sail will be necessary.
  • a plastic sleeve is slid onto the mast and secured at the level of the boom to be connected with the aid of a tool.
  • a hook is attached to this sleeve, in which the boom is hung with its head.
  • a boom which consists of forks connected to each other at both end sides, which have a boom head, which is essentially designed as an axially divided, clamp-like component that encompasses the mast in this is essentially frictionally clamped.
  • the two halves of the front boom fitting are in their, in the direction of travel of the windsurfers, located in front of the mast articulated with each other by a hinge pin, so that by opening the lock located on the rear boom fitting the front boom fitting spread and thus led around the mast and on this can be moved. By closing the lock, the two halves of the front boom fitting are pressed against the mast.
  • a disadvantage of this known boom is, however, that, as shown above, even with a slight adjustment of the boom height, as is necessary to adapt to other sailing or wind conditions, the rear lock must be opened. However, this is in a rigged state, i.e. H. when the sail is tensioned, not possible because the trim sheet for tensioning the sail is attached to the rear boom fitting, which is formed here by the locking mechanism. Therefore, the trim sheet for moving the boom must at least be loosened. Tensioning the sail again is very tedious and time-consuming, especially on the water in strong winds and waves.
  • the strength of the mast-boom connection is also dependent on the diameter of the mast used, i.e. that is, lower holding forces occur with a thinner mast than with a thicker mast. This should also be taken into account when adjusting the height of the boom on the mast, since conical masts are generally used.
  • a disadvantage of the mast-boom connection described above is that the positive connection is only effective when the sail tension is very strong.
  • the boom is expanded by the weight of the surfer, i.e. H. the distance boom head - rear boom fitting is shortened or a lower sail tension is used in light wind, the pulling force of the sail on the mast-boom connection is reduced, so that a safe coupling is no longer guaranteed.
  • the clamp connection of the boom to the sailing vehicle according to the invention ensures a permanent and absolutely secure fit of the boom on the mast, which does not loosen even during prolonged surfing. Since this connection does not require a great deal of effort or special skill, it can also be handled safely by everyone.
  • the clamp connection has the advantage that the mast is protected because the boom is absolutely tilt-proof on the mast. This significantly reduces the risk of the mast breaking.
  • the firm and at the same time gentle contact of the boom head to the mast can be further increased by lining the inner surface of the clamp with an adhesive coating, especially with adhesive rubber.
  • a particularly advantageous embodiment of the boom according to the invention provides for the use of a quick-action lock for the boom head designed as a clamp.
  • This quick release fastener is designed so that with its help the two clamp halves can be connected to the mast without using a tool.
  • the two clamp halves can be completely separated from one another when the quick-action lock is released, so that the boom can be removed from or attached to the mast in a simple manner.
  • the boom is to be opened completely on the mast side
  • the boom is opened and closed at the rear connecting piece.
  • the two clamp halves of the boom head via a swivel connection, for. B. a hinge, articulated and the eighth, separable fork connection fitting is equipped with a quick release.
  • the aft quick-release fastener is connected, the boom head is clamped to the mast at the same time.
  • the great advantage of the aft quick-release fastener is the leverage effect of the two relatively long forks on the two clamp halves to be closed on the mast.
  • the inner clamp surface can, for example, have a square cross-section, as a result of which these clamp surfaces are coupled tangentially to the mast.
  • the inner surface of the clamp is circular-cylindrical in such a way that the diameter of the inner surface of the clamp essentially corresponds to the outer diameter of the mast.
  • the circular cylindrical design of the inner surface of the clamp results in the best and most gentle coupling of the boom to the mast by means of the clamp-shaped boom head.
  • the boom head according to the invention is also ideal for converting conventional booms with rope or hook connection to the mast. For this purpose, only the original boom head has to be removed and the two forks have to be inserted and fastened in mounting holes of the clamp boom head or in corresponding adapter tubes that are attached to the head.
  • FIG. 1 shows a complete boom for a sailing or windsurfer, which consists of two forks 20 and 21 which are characteristic of this type of sailing vehicle. Aft, the fork ends 24 and 25 are connected to one another by a connecting fitting 50, while the front fork ends 22 and 23 are each fastened in a clamp half 13 and 14 of the boom head designed as a clamp.
  • the boom head 10 is shown in detail.
  • This designed as a clamp boom head 10 consists of a tensile and compressive plastic material or a metal alloy, in particular aluminum alloy and has 13 and 14 holes in each clamp half, which run essentially in the -clamp plane and into which the two fork ends 22 and 23 are inserted.
  • the fork ends 22 and 23 are clamped in the boom head 10 by screws, not shown.
  • the two clamp halves 13 and 14 expanded to accommodate the fork ends 22 and 23 are moved apart from one another by bending the elastic fork tubes 20 and 21 to such an extent that the split fork head 10 can be plugged onto the mast 30.
  • the eighth connecting fitting 50 can, however, also be designed in a split manner, the two fitting parts being guided together by a hinge, the pivot axis of which runs essentially perpendicular to the fork plane. By this measure, the two-part boom head 10 can be opened without any effort and hinged to the mast.
  • the axially split boom head clamp has an inner surface 12 which is essentially circular-cylindrical and the diameter of which essentially corresponds to the outer diameter of the mast 30.
  • the inner surface 12 of the clamp is additionally lined with an adhesive covering 15, which consists for example of an adhesive rubber. This adhesive rubber is used for the gentle coupling of the inner clamp surface 12 to the mast 30.
  • the clamp 30, which surrounds the mast 30 with its two halves 13 and 14, is provided with a quick-release fastener 40, with which the two clamp halves 13 and 14 can be immovably coupled to the mast 30, and which is inserted in the clamp so that it can be removed from the mast 30 when the quick-action fastener 40 is open.
  • the quick-action lock 40 can be designed in a known manner as a bayonet or as a locking pin lock.
  • the quick-action fastener consists of a simple screw connection, which is provided in the two halves of the clamp opposite the fork connection.
  • a hole for a wing head screw 41 is made, which is substantially perpendicular to the clamp separating surface and is extended towards the outer edge of the clamp. This widening or recess 19 in the clamp half 13 serves to completely accommodate the head of the wing screw 41 and to make the wing head screw accessible for easy handling.
  • a corresponding threaded bore 42 is made, into which the wing screw 41 can be screwed to clamp the clamp to the mast 30.
  • a bore 18 is made in the clamp half 14 for a starting sheet.
  • a groove-like or rebate-like undercut 16, 17 is provided for better guidance of the clamp halves when connecting to the mast 30 or for stabilizing the clamp clamp half connection thereby achieved.
  • the two clamp halves 13 and 14 of the boom head 10 can be pivoted together and the boom can be opened at the rear end by a two-part fork connection fitting 50.
  • This aft separable boom is placed with the forks 20 and 21 pivoted around the mast 30 and the clamp 40 is clamped to the mast 30 in that the aft fork connection fitting 50 is closed and locked.
  • the eighth fork connection fitting 50 is provided with a quick release lock.
  • the advantage of this embodiment is obvious and is that the two fork arms 20 and 21 serve as lever arms, which favorably clamps the boom head clamp 40 on the mast, so that this boom can be easily connected to the mast by anyone.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Shovels (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (6)

1. Wishbone pour véhicules à voile, notamment pour une planche à voile, constitué par deux montants reliés l'un à l'autre à une extrémité, par une tête de wishbone (10) qui entoure un mât (30) pour l'enserrer, par deux moitiés de mâchoire (13, 14) fixées aux extrémités des montants qui se correspondent et par un dispositif de fermeture (40), caractérisé en ce que les deux moitiés de mâchoire (13, 14) sont complètement séparées l'une de l'autre sur toute leur longueur dans le sens de l'axe médian du wishbone et en ce que le rapprochement des deux moitiés de mâchoire (13, 14) par le dispositif de fermeture (40) provoque le serrage de la tête de wishbone (10) sur le mât (30).
2. Wishbone selon la revendication 1, caractérisé par des moulures (16, 17) en forme de rainures ou de fentes qui sont ménagées sur les deux moitiés de mâchoire (13, 14) dans la zone de la surface de séparation des mâchoires.
3. Wishbone selon l'une des revendications 1 ou 2, caractérisé par un revêtement (15) assurant l'adhérence, notamment en caoutchouc adhérent, recouvrant la surface intérieure (12) des mâchoires.
4. Wishbone selon l'une des revendications 1 à 3, caractérisé en ce que la surface intérieure (12) des mâchoires a essentiellement la forme d'un cylindre de section circulaire et un diamètre correspondant sensiblement au diamètre extérieur du mât (30).
5. Tête de wishbone selon l'une des revendications 1 à 4, caractérisée en ce que les deux moitiés de mâchoire (13, 14) comportent des alésages de réception ou des raccords tubulaires pour l'assemblage avec les montants d'un wishbone classique.
6. Tête de wishbone selon la revendication 5, caractérisée en ce que le dispositif de fermeture (40) est un dispositif de mesure à serrage rapide.
EP86103785A 1985-04-19 1986-03-20 Wishbone Expired EP0198261B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103785T ATE39892T1 (de) 1985-04-19 1986-03-20 Gabelbaum.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3514265 1985-04-19
DE19853514265 DE3514265A1 (de) 1985-04-19 1985-04-19 Gabelbaum

Publications (2)

Publication Number Publication Date
EP0198261A1 EP0198261A1 (fr) 1986-10-22
EP0198261B1 true EP0198261B1 (fr) 1989-01-11

Family

ID=6268660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103785A Expired EP0198261B1 (fr) 1985-04-19 1986-03-20 Wishbone

Country Status (3)

Country Link
EP (1) EP0198261B1 (fr)
AT (1) ATE39892T1 (fr)
DE (2) DE3514265A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH670998A5 (fr) * 1986-10-09 1989-07-31 Hansruedi Naepflin
GB2232140A (en) * 1989-05-20 1990-12-05 Peter Stuart Spencer Wishbone boom mast collar for a sailboard
DE4213825A1 (de) * 1992-04-28 1993-11-04 Klaus Steinig Gabelbaumkopf fuer einen gabelbaum eines windsurfgeraetes
RU2160687C1 (ru) * 1999-12-15 2000-12-20 Волгоградский государственный технический университет Устройство для соединения гика-уишбона с мачтой

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982004425A1 (fr) * 1981-06-11 1982-12-23 Gaide Albert Dispositif de retenue de la bome pour planches a voile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1332686A (fr) * 1962-06-06 1963-07-19 Lorba Raccord pour éléments de structure tubulaire
FR1462459A (fr) * 1965-11-05 1966-04-15 Diela Soc D Expl Des Ets Dispositif d'assemblage de deux éléments de forme allongée perpendiculaires entreeux
DE2855556A1 (de) * 1978-12-22 1980-07-03 Christian Gruemann Spreizbaum fuer segelbretter
DE2912868A1 (de) * 1979-03-30 1980-10-09 Biggesee Boots Service Gmbh & Segelrigg
DE3032631A1 (de) * 1979-10-05 1982-04-08 geb. Nowak Renate 5650 Solingen Felsberg Klemme
US4448142A (en) * 1981-11-02 1984-05-15 The Coleman Company, Inc. Boom assembly for sailboard

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982004425A1 (fr) * 1981-06-11 1982-12-23 Gaide Albert Dispositif de retenue de la bome pour planches a voile

Also Published As

Publication number Publication date
EP0198261A1 (fr) 1986-10-22
DE3514265A1 (de) 1986-10-23
DE3661709D1 (en) 1989-02-16
ATE39892T1 (de) 1989-01-15

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