DE3321620A1 - Mast-adjusting arrangement on a surfboard - Google Patents

Abstract

The invention relates to a mast-adjusting arrangement on a surfboard with a guide rail (15) which is attached to the surfboard (1) in the longitudinal direction and on which a slide (20) is arranged in a displaceable manner. The mast foot (122) can be inserted into the slide (20). The slide (20) is held in a desired position by a locking means (126, 125, 135). To adjust the mast (6), a pull is exerted on a rope tackle (135) which is connected to a spring-loaded latch pin (126). The latch pin (126) is thereby disengaged from the tooth system of the guide rail (15), as a result of which the slide (20) and thus the mast foot (122) can be displaced. The rope tackle (135) and its end eye (143) are connected to operating ropes which are in turn fastened on both sides of a sail to the wishbone of the surfboard (2). A hand actuating arrangement is thereby obtained which is attached to the rig and thus, contrary to the prior art, is not operated with the foot but is easily operated with the hand within favourable reach of a surfer. <IMAGE>

Description

PATENT AGENT;. "'; *'.";

Dl PL-PHYS "HANS-J. NEUBAUER 3 3 21 6 2

EUROPEAN PATENTATTORNEY

Fauststrasse 30 HEKO Kunststoff- D-8070 Ingolstadt

Teilevertriebs GmbH.

Telephone (08 41) 7 24 Schloßgut Hart No. 6 Telegram neupat Ingolstadt

8091 Rainerberg Telex 5 5809 nepa d

P 31HE 83/3

Mast adjustment device on a surfboard

The invention relates to a mast adjustment device on a surfboard according to the preamble of claim 1.

To improve the properties of a surfboard, in particular to achieve more speed, greater safety in strong winds and an increase in maneuverability, it is known to change the mast base point on the surfboard depending on the ambient conditions.

The position of the mast base point is changed in a simple embodiment that the mast in different, one behind the other recesses is plugged on the top of the surfboard. The disadvantage is that a Implementation of the mast while driving can not be carried out and intermediate adjustments between the fixed provided mast base points are not possible.

To create an improvement here, a continuous mast adjustment device is known, which also during 20th

* 5 332Ί620

the trip can be operated (windsurfing magazine Surf, May 1983 issue, page 17). The mast adjustment device shown here consists of a rack with a round cross-section, on which a slide is slidably attached is. The mast base can be inserted into the slide and thus the mast base point when the slide moves movable. The slide is held on the rack with the aid of a detent. Via a push button or a Foot lever can tilt the rack and thereby the locking connection can be released, freeing the slide is movable.

In strong winds and with a mast base far back to the stern, the bow of the surfboard comes out of the Water, as a result of which the sliding and steering properties deteriorate. When the mast base point forward to the bow is brought there, on the other hand, the bow dips further, which increases the speed and the Tax property is improved. In the case of the known device, the procedure is such that the surfer steps on the foot control lever and thereby tilts the rack. Because of the wind pressure in the sail, which caused the If the mast pushes forward towards the bow, the slide and thus the mast base point on the rack forward until the foot control lever is released.

Precisely this type of activity is cumbersome and inconvenient for a surfer. To close the foot control reach, the surfer usually has to change his optimal position and weight distribution or from the am Surfboard attached foot straps rise. This disturbs the smooth, brisk ride and the feeling of the foot control lever is cumbersome and inconvenient. Another serious disadvantage of foot actuation is that both the actuation pressure and the actuation time can only be roughly measured with the foot. This leads to,

that especially in stronger winds after loosening the locking connection the slide and thus the mast base point so quickly to the front stop that the desired, defined Intermediate positions are hardly achievable. Changes in the base of the mast to the rear, e.g. B. if one is desired Intermediate position has been accidentally overrun, however, are only possible if the wind pressure is off taken from the sail. It is not for nothing that the above-mentioned publication states from the outset that a practice time of 2 to 3 hours is required to learn how to adjust the mast. This can be done without further ado the difficulty of operation can be derived, which with increasing wind force, when a mast adjustment becomes interesting, increases.

In contrast, the object of the invention is to simplify the construction of a generic mast adjustment device and improve both function and usability.

This task is carried out with the distinctive features of the.

Claim 1 solved.

According to claim 1, a guide rail mounted in the longitudinal direction on the surfboard is proposed on which a slide is displaceable. The mast base is attached to the sledge. The guide rail is a toothed rail with upwardly directed toothing, in which a spring-loaded door engages, from the base of the mast downwardly standing locking bolt. The locking pin is connected to a cable with which it is raised against the spring load by the surfer and thus can be freaked out. The cable pull is without a large deflection angle through a hole in the rubber joint guided. The cable pull could, for example, be led laterally to the outside directly in the rubber joint or first further up through a side opening in the mast or in an adapter part.

Claim 2 reproduces an embodiment which is simple in terms of production engineering and has proven itself in trials. Contains here the rubber joint has a vertical, central recess through which the cable pull, starting from the locking bolt, follows is performed above. The cable is opened through a side exit opening on the mast or on an adapter part that the mast is put on, out. If the surfer pulls the cable, it is advantageous here to almost exerted tensile force acting in the tensioning direction of the spring.

According to claim 3, the cable should be attached to the boom within reach of the surfer. This allows the mast adjustment device without having to change position of the surfer and in particular without having to step out of the foot straps will.

In an expedient embodiment according to claim 4, the cable is in the lower part or until shortly after the side Outlet opening from a steel wire rope. This has the advantage that it is flexible, but still relative is stable, so that, for example, it does not slip back into the outlet opening and in the event of frictional contact does not wear out. At the upper end of the wire rope a loop is expediently attached to which two ropes are attached, which in turn are tied on both sides of the sail on the boom within easy reach of the surfer. These two ropes should be made of a non-slip material such as braided plastic. With this arrangement, the surfer can comfortably use the mast adjustment device from both sides of the boom serve. This manual operation has the advantage that the surfer his position and position during practically do not change when moving the mast got to. Another major advantage is that manual operation is much more sensitive is to be carried out than the foot control contained in the prior art, whereby the release or release time for

the locking device can be dosed more precisely. This enables a more precise setting of intermediate values can be reached along the guide rail, d. H. the mast base can be moved slowly and in a controlled manner.

Manual actuation is much more convenient and convenient to perform than foot actuation.

According to claim 5 in. A spiral spring vulcanized into the rubber joint through which the cable is passed.

As a result, the cable guide is always kept open, since the rubber of the rubber joint is without the spiral spring insert would buckle so far that the hole would kink and no longer be continuous. With the spring insert on the other hand, safe and easy passage of the cable pull is guaranteed even with steep inclines of the mast.

With the features of claim 6, an extremely useful and preferred embodiment is achieved. The outlet opening for the rope pull or for the end of the wire rope should only be a little above the rubber joint, i.e. H. far be arranged at the bottom of the mast base. With the mast adjustment devices from the prior art, only the mast adjustment device can be unlocked and the mast with the help of the wind pressure forwards in the direction of the bug will be traversed. Because of the loose connection between the boom and the sail, it is when there is wind pressure In the sail it is practically impossible to pull back on the base of the mast. The mast can therefore can only be reset here so that the wind pressure is removed from the sail and usually a foot on the lower Mast part hooked and this is withdrawn. With the arrangement of the outlet opening according to the invention for the cable pull on the lower part of the mast, near the rubber joint, on the other hand, becomes a point of attack for the Withdrawal of the mast foot created. To reset the mast, the surfer only has to use the one on the boom

Pull the attached rope, whereby with a slight pull the Locking device is unlocked. If the slight pull is maintained, the base of the mast is caused by the wind pressure moved forward in the sail towards the bow. If, on the other hand, the pull on the rope is increased, the base of the mast can follow can be pulled back without the surfer changing his position significantly or stepping out of the foot straps must, and without the wind pressure having to be significantly reduced from the sail. The mast can thus during the fast travel can be adjusted advantageously in both directions, with which the surfer the mast position of the can adapt to the respective situation without loss of speed. This is especially important in strong winds, because then the surfer cannot change his position and weight distribution at will without risking a fall or step out of the foot straps.

The lower part of the mast foot is usually rotatably mounted in the surfboard. This rotatable bearing should also be carried out as a connection to the mobile slide. According to claim 7, however, the mast or an adapter part should also be used , onto which the mast is attached, can be rotatably held at the top of the rubber joint. This means that in In any case, it is ensured that the control cable or the two operating cables do not get mixed up.

According to claim 8, the flanks pointing to the bow should the toothing run out flat, the bevel angle should preferably be chosen between 10 and 15 °. The ones pointing to the stern Flanks, on the other hand, are steep or dropping vertically. This has the effect that when triggering or lifting the Locking bolt the wind pressure in the sail moves the carriage and thus the locking bolt in the direction of the bow and at only a slight yield on the hand lever, the locking bolt hits the vertical flanks. This creates a exact locking and adjustment achieved, which can be precisely adjusted by hand. There is therefore no risk of that when the hand lever is operated, the slide and thus

the mast base point for the actuation device too quickly all intermediate positions up to the front stop run over.

According to claim 9, the locking bolt should be made round and rest in semi-cylindrical, vertical recesses on the vertical flanks of the toothing. Because of the wind pressure, the locking bolt rests in the semi-cylindrical recess, which enables good rotatability and IQ guidance between the mast and the board.

The flanks of the rack, in particular the vertical flanks, against the locking bolts when the mast is adjusted drives are mechanically heavily loaded. It would be now

! 5 conceivable, the tooth splint as a whole made of solid material, for example steel. However, since the surfboard is made of plastic, one has to run along its length be connected to the guide rail made of a similarly flexible material, since the board itself vibrates and attaches itself a rigid rail can destroy. Therefore, it is proposed in claim 10, the guide rail itself Manufacture plastic material and the tooth flanks, in particular the vertical flanks to be provided with steel inserts or steel bushings that match the tooth contour are. This means that the stop points are largely free of wear made.

So that the surfboard retains a largely smooth surface, it is useful to attach the guide rail in a longitudinal recess on the top of the surfboard. In this case, as shown in claim 11, it is expedient to place the guide rail on the longitudinal sides bevel so that no dust or sand adheres to it and the slide guide remains smooth-running.

According to claim 12, the longitudinal recess in which the Guide rail runs, a connection with the sword

have box. This ensures that dust and sand that may get into the longitudinal recess through the sword case is simply washed away.

An exemplary embodiment of the invention with further details, features and advantages is shown on the basis of a drawing explained in more detail.

Show it

1 shows a surfboard with a mast adjustment device

in use with the arrangement of a cable pull and operating ropes,

5 Fig. 2 shows a section through a guide rail and a slide of the mast adjustment device,

3 shows a section through a mast base with a rubber joint, Adapter part, locking device and cable pull,

4 shows a cross section through the carriage,

5 shows a cross section through a toothed splint with insert bushings,

FIG. 6 shows a plan view of a toothed splint (A-A corresponds to the sectional direction for FIG. 5; B-B corresponds to FIG Cutting direction for Fig »7),

7 shows a longitudinal section through the toothed splint.

In Fig. 1, a surfboard 1 is shown in use. The surfboard 1 consists essentially of the floating body 2 and the rig 3 attached to it. Foot straps 4 are located on the float 2 in the rear area attached, the straps of which protrude from the surface of the float. Approximately in the middle area of the swimming

body 2, a longitudinal recess 5 is attached, in which a guide rail is attached, on which a mast 6 of the rig 3 is slidable. A sail 8 is held on the mast 6 and a boom 7. The sail 8 contains a Window 9 through which the rear bracket of the boom 7 can also be seen. A surfer 10 braces himself against the wind pressure in the sail 8 and holds the boom 7 firmly.

The mast 6 is along its adjustment path in the longitudinal recess 5 held by a locking device shown in more detail below. To operate the locking device are attached to the front end of the boom 7, two control cables 11, 12, which are loosely within reach of the surfer 10 hanging down. The lower ends of the operating cables 11, 12 are connected to a wire cable 13 attached, which emerges from the side of the mast 6 and, as shown below, connected to a locking bolt is.

When the mast 6, e.g. B. in strong winds, forward in the direction is to be moved to the bow, the surfer 10 only needs to pull on one of the operating ropes, whereby the locking device is released. The mast 6 with its mast base is then due to the wind pressure in the sail 8 moved forward until the control cable 11, 12 is released and the locking device again clicks into place. If the mast 6 is to be moved back again, the operating rope 11, 12 is gripped as far down as possible and by pulling only the locking device unlocked and then the mast 6 as a whole withdrawn.

In Fig. 2 a cross section through the floating body 2 in the area of the longitudinal recess 5 is shown. In the longitudinal recess 5. A toothed rail 15 with upwardly facing teeth (see also Fig. 6 and Fig. 7) is attached. The lateral guide strips 16, 17 are beveled and are slidable by recesses 18, 19

Slide 20 encompassed.

At the top, the carriage 20 contains a cylindrical bore 21 into which a mast foot 122 can be inserted. The cylindrical lower part 123 of the mast base 122 has a circumferential groove 124 into which one in the bore 21 of the The spring 25 held by the slide 20 engages so that the mast 6 is secured against being pulled out of the slide 20 is, but remains rotatable in the carriage 20.

A locking bolt 126 arranged vertically in the mast foot 122 is used for locking into the toothing of the toothed rail 15. The locking bolt 126 is movable in the vertical direction in the cylindrical lower part 123 and is clamped in by a Return spring 125 loaded. The locking bolt 126 is supported downward by a Seger ring 127. The cylindrical Part 123 is screwed into a lower receiving part 128 which is vulcanized onto a waisted rubber element 129. A stop nut is screwed onto an upper receiving part 130 of the rubber element 129, under which a collar 131 is one cylindrical adapter part 132 engages. As a result, the adapter part 132 is rotatably mounted on the rubber joint 129. in the Rubber element 129 is contained an axial bore which is formed by a coil spring 133. The adapter part 132 carries a circumferential collar 134 on which the The lower part of the mast 6 is supported.

The end thickening 144 of a steel wire rope hoist 135 is received in a lower bore of the locking bolt 126. The steel wire cable 135 extends upward through the locking bolt 126, the return spring 125, a stop plate 136, the spiral spring 133 and through a lateral outlet opening 142 in the adapter part 132. The cable 135 ends in an eyelet 143 to which the operating cables 11, 12 shown in FIG. 1 are to be attached.

, In Fig. 4 is a section through the carriage 20 is shown, from which it can be seen that the slide can simply be pushed onto the toothed rail 15 shown below in FIG is and on this as long as the mast 6 is not

is inserted, slides freely.
5

In the plan view according to FIG. 6, the inclined guide strips 16, 17 can be seen and the upward from the Toothing protruding from the drawing plane, which consists of vertically sloping flanks 37 and inclined surfaces 38. In the vertically sloping flanks have semi-cylindrical recesses 39 (in the direction of the bow), which correspond to the locking pin 26 in terms of their diameter.

c In Fig. 7 is a longitudinal section along the cutting line B-B shown, from which the semi-cylindrical recesses with the vertical .aballenden flanks 37 and the inclined surfaces 38 can be found.

Another preferred embodiment is at the intersection line A-A the dental splint 15 shown. The semi-cylindrical recesses are to protect against overload formed from steel bushings 40. As can be seen from FIGS. 5 and 7, the steel bushings are in the exemplary embodiment shown pressed into the bores of the rack 15. Inside the rack material are the steel bushings 40 cylindrical and cut out only on its upper side in the area of the toothing, so that the semi-cylindrical Form emerges.

The arrangement shown has the following function:

While surfing, the wind pressure is in the sail, which pushes the mast base 122 and thus the locking bolt 126 forward one of the semi-cylindrical recesses 39 urges. To 3g a mast adjustment or a shift of the mast base 122 in the direction of travel is pulled by the surfer 10 on the operating cable 12, for example. This will counter

the force of the return spring 125 of the locking pin 126 is raised over the toothing of the rack 15. The sled then drives towards the bow because of the wind pressure. It should be emphasized here again that the The carriage itself does not have a latching device and also not directly with the cable 135 or the operating ropes 11, 12 is connected. As a result, the mast 6 with its adjustment device can easily be removed from the surfboard be solved. If the mast foot 122 is to be moved backwards against the wind direction, the operating cable 12 pulled harder, moving the mast backwards.

When the pull on the operating cable 12 slackens, the locking bolt becomes 126 is immediately pushed down again by the return spring 12 5 and comes back into the area of the toothing. In doing so, it slides down on the inclined surface 38 just below and catches on the next one vertical flank 37. This enables precise adjustment and longitudinal displacement, i. H. the mast base 22 can be moved from one tooth of the toothing to the other until the optimum position is reached is. When the surfer 10 changes to the other side of the sail, the locking device is through the other operating rope 11 easy and convenient to use.

In summary, it is stated that with the invention a simple and precisely manageable mast adjustment device is made available »30

Claims (12)

Expectations Mast adjustment device on a surfboard with a rig consisting of a mast and a boom and a sail, with a guide rail attached lengthways to the surfboard, with a slide movably connected to the guide rail and displaceable on this slide, on which a mast foot with a rubber joint is detachably attached, with a locking device for the slide and an actuating device for releasing the locking device,
characterized, that the guide rail is a toothed rail (15) with teeth pointing upwards, that the locking device is a spring-loaded locking bolt (126) that protrudes from the base of the mast (122) downwards is, which engages in the toothing that the locking bolt (126) is connected to a cable (135) with which he is against the spring load (12 5) 20 can be raised, that the rubber joint (129) contains a hole through which the cable (135) is guided. 2. Mast adjustment device according to claim 1, characterized in that indicates that the rubber joint (129) contains a vertical, central hole and that with the rubber joint connected, hollow mast (6) or an adapter part (132) contains a lateral outlet opening (142) and the Cable pull (135) through the hole, the hollow mast (6) or the adapter part (132) and the side outlet opening (142) is performed. 3. Mast adjustment device according to claim 1 or 2, characterized in that characterized in that the cable (135) is attached to the boom (7) within reach of a surfer (10) is. 4. Mast adjustment device according to one of claims 1 to 3, characterized in that the cable pull (135) in the lower part consists of steel wire, at the steel wire end (143) zv / egg ropes (11, 12) of grippy, braided Plastic material are attached and these two ropes (11, 12) on both sides of the sail (8) are attached to the boom (7) within easy reach of the surfer (10). 5. Mast adjustment device according to one of claims 1 to 4, characterized in that the bore in the rubber joint (129) is formed by a vulcanized spiral spring (133) is formed. 6. Mast adjustment device according to one of claims 2 to 5, characterized in that the lateral outlet opening (142) is only slightly above the rubber joint (129) is arranged. 7. Mast adjustment device according to one of claims 1 to 6, characterized in that the mast (6) or the The adapter part (132) is rotatably mounted on the top of the rubber joint (129) » 8. Mast adjustment device according to one of the preceding claims, characterized in that in the direction of travel or flanks (38) of the toothing pointing towards the bow taper off flat, while those pointing towards the stern Flanks (37) drop steeply or vertically. 9. Mast adjustment device according to one of the preceding claims, characterized in that in the steep or vertical flanks (37) semi-cylindrical, vertical recesses (39) are attached, in the the locking pin (126) engages. 10. mast adjustment device according to claim 8 or 9, characterized characterized in that the toothed rail (15) is made of plastic and that the flanks (37, 38) or the cylindrical recesses (39) made of steel inserts or steel bushings (4o) are made » 11 »Mast adjustment device according to one of claims 1 to 10, characterized in that that the guide rail (15) on its long sides (16, 17) is beveled, is spanned by the slide (20), and in a longitudinal recess (5) in the surfboard body (2) is attached » 12. Mast adjustment device according to claim 11, characterized in that that the longitudinal recess (5) has a connection with the sword case =