EP0305674A1 - Mast für ein Segel - Google Patents

Mast für ein Segel Download PDF

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Publication number
EP0305674A1
EP0305674A1 EP88110212A EP88110212A EP0305674A1 EP 0305674 A1 EP0305674 A1 EP 0305674A1 EP 88110212 A EP88110212 A EP 88110212A EP 88110212 A EP88110212 A EP 88110212A EP 0305674 A1 EP0305674 A1 EP 0305674A1
Authority
EP
European Patent Office
Prior art keywords
mast
cross
area
section
length
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.)
Ceased
Application number
EP88110212A
Other languages
German (de)
English (en)
French (fr)
Inventor
Eckart Wagner
Konrad Fick
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.)
North Sails Windsurfing GmbH
Original Assignee
North Sails Windsurfing 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 North Sails Windsurfing GmbH filed Critical North Sails Windsurfing GmbH
Publication of EP0305674A1 publication Critical patent/EP0305674A1/de
Ceased 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
    • B63H8/25—Arrangements for connecting the sail to a mast foot, e.g. downhaul tensioners or mast foot extensions

Definitions

  • the invention relates to an unstable mast for a sailing board. Sails for such unexposed masts are usually provided with mast pockets on their luff, with which they can be pushed onto the mast.
  • Untagged masts are subject to a greater degree than legged masts to a bend, both in the direction of the subsequent sail area, hereinafter referred to as the longitudinal axis of the mast cross-section, and in the direction perpendicular thereto, that is, in the direction of the transverse axis of the mast cross-section.
  • This bend arises primarily from the pulling force of the sail, which it exerts on the mast due to the wind force acting on the sail.
  • the profile of the sail is changed by the bending of the mast, which in turn influences the propulsive force exerted by the sail on the sailing board or the sailing dinghy. Because the propulsive force exerted by the sail is not only dependent on the position of the sail against the wind direction, but also on the sail profile.
  • the invention is based on the finding that the sail profile can be influenced favorably if the mast in its upper region, that is to say in the vicinity of the mast tip, is relatively strong to Lee, that is to say in the direction of the transverse axis, but only slightly in the direction of the longitudinal axis and can bend mainly in the cross direction of the mast in the central area.
  • the invention is therefore based on the object of creating a mast of the type mentioned, which has low transverse rigidity in its upper region with a relatively large longitudinal rigidity, in order to be able to bend away relatively strongly in the transverse direction there due to the pull exerted on the mast by the sail, but which has a relatively high transverse rigidity and lower longitudinal rigidity in its central area.
  • the mast has an oval or elongate cross section in its entire upper mast area, which is at least one sixth of its entire length, with a larger longitudinal axis essentially parallel to the sail area and in its adjoining central area of at least two sixths of its entire length also has an elongated or oval cross-section with a larger, perpendicular transverse axis.
  • a mast is obtained which bends in the upper region with the mast tip mainly towards the lee and in its central region mainly towards the rear, ie in the direction of the longitudinal axis of the mast cross section. This achieves an optimal sail profile with an optimal propulsion effect.
  • the cross-sectional profile which changes greatly over the mast length according to the invention, can change continuously change.
  • the low transverse stiffness in the upper mast area can be achieved in that the mast is made of plastic and is profiled or fiber-reinforced so that it has low bending stiffness in the direction of the transverse axis and substantially higher bending stiffness perpendicular to it, i.e. in the direction of the longitudinal axis of the mast cross-section .
  • the middle length area of the mast which according to the invention has high transverse rigidity and lower longitudinal rigidity, can, like the lower mast area, consist of aluminum, but if necessary also of correspondingly reinforced plastic.
  • the mast has in its upper region, which has low bending rigidity in the direction of the transverse axis, a slot which extends to the mast tip and opens there and is aligned parallel to the longitudinal axis of the mast cross section and expediently extends over at least a quarter of the entire mast length.
  • the cross-sectional parts of the upper mast area which are adjacent to one another on both sides of the slot in the direction of the transverse axis are advantageously flexibly connected in the longitudinal direction of the mast by elastic connecting elements made of rubber, foam, plastic or the like or in the form of springs.
  • the two can Bend cross-sectional parts of the upper mast area freely and independently of one another, these two cross-sectional parts being able to move freely from one another in the longitudinal direction of the mast according to their bending.
  • Both the upper and the middle and / or the lower mast area can each consist of hollow profiles which are detachably but non-rotatably inserted into one another.
  • a stop ring can be slid on the lower or middle mast part, against which the other mast part comes to rest.
  • the formation of the mast from different parts makes it possible, as desired, to replace the upper or middle mast part with a certain flexibility with another mast part of this type with a slightly different flexibility.
  • the top e.g. made of flexible plastic mast part another top mast part are plugged, which consists of a slotted aluminum hollow profile according to the invention and has slightly different transverse and longitudinal rigidity than the plastic mast part.
  • the mast shown in the drawing consists of three parts which can be plugged into one another, namely an upper mast part 1, a middle mast part 2 and a lower mast part 3.
  • the upper mast part has a longitudinal slot 4 which extends in the direction of the longitudinal axis of the mast cross-section which is essentially parallel to the sail surface, which is indicated in Fig. 1 with arrow 5, extends and opens out at the top of the mast.
  • This slot extends in the longitudinal direction of the mast almost to the lower end of the upper mast part 1, which, like the other two mast parts 2, 3, is formed from a hollow profile.
  • Fig. 2 shows this hollow profile of the upper mast part 1 in cross section. From Fig. 1 and in particular from Fig. 2 it follows that this upper mast part 1 has a changing cross-sectional profile over its length extending downward from the mast tip.
  • This mast part has an elliptical cross-sectional shape at the mast tips, the longer ellipse axis extending in the direction (5) of the longitudinal axis of the mast cross section.
  • the upper mast part 1 goes from this elliptical cross-sectional shape to its lower end continuously into an elliptical cross-sectional shape with a longer elliptical axis in the transverse direction, as can be seen from FIG. 2 in a top view of the lower part of the upper mast part 1 located below the cutting plane. This increases the transverse rigidity of the upper part of the mast from the top of the mast downwards.
  • the longitudinal slot 4 which divides the upper mast part 1 into two cross-sectional halves 6.
  • the two cross-sectional halves are connected to one another at three different locations by elastic connecting elements 7, which consist of elastic plastic, rubber, foam or the like.
  • elastic connecting elements 7 consist of elastic plastic, rubber, foam or the like.
  • spring members can also be provided as connecting members between the two cross-sectional halves 6, which allow a mutual displacement of the cross-sectional halves 6 in the longitudinal direction of the mast, which results from an independent bending of the two cross-sectional halves in the transverse direction of the mast.
  • the fastening of the connecting elements 7 to the two cross-sectional halves 6 of the upper mast part consisting of a hollow profile takes place via holding members 8, which enclose the elastic connecting elements 7 in a clamping manner and engage with connecting elements shaped like webs or teeth.
  • These mounting members are glued to the inside of the cross-sectional parts 6.
  • the plug-like elastic connecting elements 7 made of elastic plastic, rubber or the like in the example
  • other connecting elements which flexibly connect the two cross-sectional halves 6 in the longitudinal direction and thus allow a mutual longitudinal displacement of these two cross-sectional parts during the transverse bending of the upper mast part 1 can also be used, for example in the form of spring members or the like.
  • the plug-like connecting elements 7 can also be glued to the holding members 8 in the embodiment shown in the drawing.
  • the upper mast part 7 is inserted with a nozzle 10 into the open upper end of the middle mast part 2, in the hollow profile of which water penetration plugs 11 are inserted near the ends of this mast part.
  • This mast part has approximately the same elliptical cross-sectional shape at its upper end as the upper mast part 1 at its lower end, the longer ellipse axis extending in the transverse direction of the mast.
  • this central mast part 2 Since the mast in the area of this central mast part 2 should have a high transverse rigidity, but not a particularly high longitudinal rigidity, the cross section of this central mast part increases continuously in the transverse direction towards its lower end, the transverse axis of the elliptical cross-sectional shape at the lower end of this central mast part 2 reaches the greatest length, which in the example shown is approximately one and a half times the longitudinal axis.
  • the middle mast part has a length other than that of the exemplary embodiment shown, which is more than half the total mast length.
  • the largest cross-sectional dimension in the cross-mast direction can also be given above the lower end of the central mast part 2.
  • the two open ends of the middle mast part in the area in which they are plugged onto connecting pieces of other mast parts or in which other mast parts are plugged in have a constant cross section over the entire plug length, to ensure that the nested mast parts fit securely.
  • the lower mast part 3 has an invariable or almost unchangeable cross-section in elliptical shape over its length, the elliptical axis lying in the transverse direction of the mast, as in the middle mast part 2, being longer than the elliptical axis directed in the longitudinal direction of the mast.
  • the mast foot 13 is arranged in a known manner via an articulated connection 12, with which the mast can be inserted into the mast shoe or into the mast holder of a sailing board.
  • the lower mast part 3 can be inserted into the lower end of the middle mast part 2 to different degrees.
  • the lower mast part is provided with circumferential notches or beads 14 which serve to receive a rubber ring 15.
  • This rubber ring which can be moved from notch to notch 14, serves as the seat of a stop ring 16 which is placed on the outside of the lower mast part 3 and is longitudinally displaceable against this, against which the middle mast part 2 comes to rest with its lower end. 5 that the central mast part 2 has a constant cross section at its lower end over part of the insertion length of the lower mast part 3.
  • the lower mast part 3 is provided at its upper end with a wedge-shaped slot 17, which serves to bring the cross-sectional parts of the upper end of the lower mast part 3 located on both sides of this slot into the area of the middle mast part 2 to be able to insert a changing cross-section, the two cross-sectional parts being able to be pressed somewhat resiliently against one another.
  • the lower mast part is also equipped with a sealing plug 11 which prevents the ingress of water.
  • the mast parts 1, 2 and 3 each consisting of hollow profiles, can be made of light metal, plastic, but also of conventional other materials. In addition to the variations already mentioned above, other deviations from the exemplary embodiment shown are also possible.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP88110212A 1987-08-31 1988-06-27 Mast für ein Segel Ceased EP0305674A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8711778U 1987-08-31
DE8711778U DE8711778U1 (de) 1987-08-31 1987-08-31 Mast für ein Segel

Publications (1)

Publication Number Publication Date
EP0305674A1 true EP0305674A1 (de) 1989-03-08

Family

ID=6811588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110212A Ceased EP0305674A1 (de) 1987-08-31 1988-06-27 Mast für ein Segel

Country Status (2)

Country Link
EP (1) EP0305674A1 (da)
DE (1) DE8711778U1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1588935A1 (en) * 2004-04-23 2005-10-26 TRIANA s.r.l. Improved mast, in particular for sailboards

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB990220A (en) * 1960-08-24 1965-04-28 Pierluigi Greppi Manufacture of hollow tapered metal masts
EP0094661A2 (de) * 1982-05-18 1983-11-23 Urs P. Meyer Segelmast
FR2534544A1 (fr) * 1982-10-13 1984-04-20 Rech Indles Tech Centre Mat notamment pour planche a voile
EP0191001A1 (en) * 1985-01-31 1986-08-13 Enzo Scaglia A device for removably connecting hollow cylindrical elements in masts for sailing transport means

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB665862A (en) * 1949-02-21 1952-01-30 John Everett Powell Improvements in or relating to masts
FR2509250A1 (fr) * 1981-07-10 1983-01-14 Morisseau Roger Mat demontable pour voilures legeres
DE8133697U1 (de) * 1981-11-19 1982-04-22 Felsberg, geb. Nowak, Renate, 5650 Solingen Mast fuer segelbretter
DE3214339A1 (de) * 1982-02-19 1983-09-01 Mistral Windsurfing AG, 8303 Bassersdorf Mast fuer ein segelbrett
DE3300349A1 (de) * 1983-01-07 1984-07-12 Robert Thoma GmbH Rotho Kunststoffwerke, 7800 Freiburg Segelmast sowie verfahren zum herstellen eines segelmastes
DE3410152A1 (de) * 1984-03-20 1985-10-03 Schütz-Werke GmbH & Co KG, 5418 Selters Verstellvorrichtung, insbesondere fuer gabelbaeume von surf-segelgeraeten
DE8432995U1 (de) * 1984-11-10 1986-03-13 Sander Spezialwerkzeug GmbH, 5650 Solingen Vorrichtung zum Verändern der Länge der geteilten rohrförmigen Großbäume des Gabelbaumes eines Segelbrettes oder des geteilten rohrförmigen Mastes eines Segelbrettes
DE3526647A1 (de) * 1985-07-25 1987-02-05 Thoma Robert Rotho Kunststoff Rigg fuer ein windsurfbrett

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB990220A (en) * 1960-08-24 1965-04-28 Pierluigi Greppi Manufacture of hollow tapered metal masts
EP0094661A2 (de) * 1982-05-18 1983-11-23 Urs P. Meyer Segelmast
FR2534544A1 (fr) * 1982-10-13 1984-04-20 Rech Indles Tech Centre Mat notamment pour planche a voile
EP0191001A1 (en) * 1985-01-31 1986-08-13 Enzo Scaglia A device for removably connecting hollow cylindrical elements in masts for sailing transport means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1588935A1 (en) * 2004-04-23 2005-10-26 TRIANA s.r.l. Improved mast, in particular for sailboards

Also Published As

Publication number Publication date
DE8711778U1 (de) 1988-02-11

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