DE8324914U1 - DETACHABLE MAST FOOT ANCHORING FOR A SAIL SURF - Google Patents

Description

MS 45

Mistral Windsurfing AG, Alte Winterthurer Strasse, CH-8303 Niirensdor f-Ziirich,

Switzerland

Detachable mast foot anchorage for a sail surfer

:.

DESCRIPTION

The innovation concerns a detachable mast base anchoring for a sail surfer, with a receiving part attached to the sailboard and one formed on the end of the mast foot facing the sailboard, in a Bore of the receiving part retractable bolt, wherein

^ O a device for adjusting the release force of the Connection between the receiving part and the bolt is provided, in which, by turning the bolt, different latching surfaces come into effect.

Such mast foot constructions have the advantage over mast feet firmly attached to the sailboard that the mast base of the rig releases under heavy load in the axial direction of the mast base from the receiving part of the sailboard, causing injuries such as

^ou crushing of the toes of the surfboard user between the mast or mast foot and the surfboard are avoided. Adjusting the release force has the particular advantage that, similar to safety bindings on skis, different external conditions and the different personal requirements of the surfboard user can be taken into account.

A detachable mast base anchoring is from DE-PS 29 Ol 760 known. Here axially extending, radially resilient spring arrays are formed on the bolt, wel- ^ before locking lugs with locking surfaces, and the receiving part is designed as a sleeve which with the Has locking surfaces interacting locking lugs or locking edges, wherein by turning the bolt and / or the Sleeve the trigger torque is increased or decreased.

Such a construction has the disadvantage that a a relatively long overall length of the bolt is required, because on the one hand this must be held securely in the sleeve and thus have a certain overall length must, since on the other hand, however, this length required to hold the bolt is still the length of the Connecting struts, which is also significant,

to ensure the required elasticity. 20th

Another disadvantage of the construction according to DE-PS 29 01760 can be seen in the fact that the struts are relatively susceptible to damage and especially the There is a risk of permanent bending of the same, which would prevent proper functioning of the mast foot release.

Furthermore, there is a not inconsiderable risk of injury due to the radially outwardly protruding locking lugs.

drive for the user.

The present innovation is therefore based on the task of providing a simple, secure, detachable mast foot anchoring according to the type mentioned at the beginning create in which in particular the aforementioned disadvantages of the prior art are entirely or partially avoided.

In order to solve this task, it is provided according to the innovation, that the locking surfaces on the bolt are rigid and that in the bore of the receiving part a with | the locking surfaces cooperating spring element is provided. In contrast to the prior art, im In the case of the present innovation, the resilient elements of the detachable mast base anchoring are no longer on Bolts of the mast foot, but rather provided on the receiving part of the sailboard. They are therefore not springy Arms more required on the bolt, so that the overall length of the bolt can be reduced considerably. After the spring element is protected inside of the receiving part is arranged and the bolt is thus rigid, there is a risk of damage the detachable mast base arrangement is as good as impossible.

According to a further, particularly advantageous feature According to the innovation, the bolt has a groove extending around the axis of the bolt into which the The spring element engages, and the locking surfaces are on the end of the bolt facing the sailboard side Formed side surface of the groove. The bolt does not have any projections at all, only Wells, so that the risk of injury to the user is significantly reduced.

Preferably, the has the sailboard side at the end of the Bolt facing section of the bolt between this end and the groove at least one to the axis of the Bolt on parallel flattening whose distance from the axis of the bolt is greater than that of the bottom the groove. In this case, several flattened areas can expediently be offset in the circumferential direction of the bolt be provided whose distance from the axis of the bolt is different in each case. After yourself

such a flattening extends up to the groove, corresponds this flattening a reduced area of the adjoining side surface of the groove, which in turn represents the locking surface, the locking surface being smaller, the larger the flattened area or, in other words, the smaller the distance de? Is flat on the axis of the bolt. By providence a plurality of different flattened areas are thus generated locking surfaces of different sizes, with one each locking surface corresponds to a specific release torque.

Alternatively, the side surface of the groove facing the end of the bolt on the sailboard side can at least have a bevel inclined towards the end of the bolt on the sailboard side, and if more than one different tripping torques should be adjustable, so can be offset in the circumferential direction of the bolt, several bevels can be provided, the inclination of which is different in each case. Defined here the inclination of the respective bevel the size of the release torque. The greater the slope, the less is what is required to trigger the mast foot anchoring Force.

Of course, it is also possible for training to choose a combination of flats and bevels of the locking surfaces.

To change the release force, the one on the sailboard side can alternatively be used. End of the bolt facing, section of the bolt running parallel to the axis of the bolt between this end and the groove of a minimum center distance up to a maximum center distance which is at most equal to the center distance of the Bolt beyond the groove, change continuously. at

such a configuration of the lower portion of the bolt with a spiral cross-section is a continuous one Adjustment of the release force possible. The slope of the bevel of the Continuously changing the side surface of the groove, which also has a continuously adjustable release force would result.

, Q C according to another useful feature of the innovation it is provided that the section of the bolt facing the sailboard end of the bolt is between the bolt End and the groove has at least one to the axis of the bolt parallel flat, the

-. (■ The distance to the axis of the bolt is the same as that of the bottom: groove. This flattening is used in particular to easily remove the mast foot from the receiving part, but also allows the Bolt in the receiving part.

The spring element is advantageously according to a Another feature of the innovation is formed by a resilient leg of a leg spring, which is in the ok bore of the receiving part inserted bolt tangentially runs towards the groove and at least partially engages in the groove ft.

The bolt carrying the locking surfaces is expediently mounted on the mast base so as to be rotatable about its longitudinal axis. For this purpose, the bolt can in particular be rotationally fixed with a handle for adjusting the angular position of the bolt be connected relative to the receiving part, advantageously according to a further feature of. innovation a latching device between the handle and the receiving part is provided for locking the selected angular position. In this way, the

Individual release positions or the position in which no latching force is effective for releasing the mast foot from the sailboard can easily be set by the user.
5

According to Another feature of the innovation expediently the bolt have a through hole through which he at one end of the mast foot on the sailboard side attached pin rotatable, but mounted non-displaceably is.

Further advantageous features of the innovation can be found in the following description in which several embodiments of the innovation based on the Drawing are explained in more detail. In the drawing show:

Fiq. 1 a top view of the sailboard-side assembly

acquisition part of a first embodiment

an anchoring of the mast foot according to the innovation,

FIG. 2 shows a section through the receiving part according to FIG

along the line II-II with the mast-25 inserted

foot,

Fig. 3 is a section through the receiving part according to Fig.l along the line IH-III,

Fig. 4 is a section through the bolt of the mast foot tje-

mä3 Fig. 2,

Fig. 5 is a sectional view along the line V-V according to Fig. 2 of the lower portion of the bolt; »,

6 shows a section through a further embodiment of a mast foot anchoring according to the innovation,

7 shows a section through the mast base anchoring according to FIG. 6 in a plane related to the drawing according to FIG. 6

vertical plane,
5

8 shows a view of the lower part of the bolt according to FIG. 6,

FIG. 9 shows a section through the bolt according to FIG. 8 the line IX-IX, and

FIG. 10 shows a section through the bolt according to FIG. 8 the line X-X.

Reference is first made to the exemplary embodiment according to FIGS. 1 to 5. The mast base anchoring includes serving as a receiving part on the sailboard side receiving block 1, which in a suitable manner on the not shown sailboard is anchored. The receiving block 1 has a through hole 2, which serves to accommodate a bolt 3 on the mast base.

The mast side bolt 3 is at the lower end of a Arranged mast foot of a rig, of which only the lower part of an elastic rubber joint 4 is shown is. The elastic rubber joint 4 has an axial metal insert 5 with a central blind hole 6, which is provided with an internal thread 7.

The bolt designated as a whole by the reference number 3 is attached via this internal thread 7 to the Gupmi joint 4 and thus to the mast base. The bolt 3 is composed from a carrier pin 8 which is screwed into the internal thread 7 of the blind bore 6 via a thread 9 is until the end of the support pin facing the mast base strikes the bottom of the blind hole 6.

The carrier pin attached to the rubber joint 4 in this way 8 carries a locking bolt 10, which has an axially extending bore 11, the inner diameter of which is ge-5

is slightly larger than the outer diameter of the Carrier pin 8 so that the locking pin 10 on the Carrier pin 8 is rotatably mounted. (To prevent * the locking bolt 10 from slipping off the carrier pin 8, points

the Träqerstift 8 at its mast foot remote ** end one 10

Screw head 12, its outer diameter opposite

the diameter of the shaft of the pin 8 is slightly increased and that with a shoulder 13 inside of the locking bolt 10 cooperates, which at the end of a hole 14 enlarged compared to the hole 11 in the Locking pin 10 for receiving the screw cap 12 of the carrier pin 8 is formed. The locking pin 10 is thus rotatable, however ', fixed non-displaceably on the rubber joint 4 and thus on the mast base.

At its lower end portion of the locking bolt 10 has a circumferential groove 15 which in the Through hole 2 of the receiving block 1 used Bolt 3, with a leg 16, a leg spring 17

comes into engagement, as shown, for example, from FIG. 2 26

can be seen. The leg spring 17 is ~ an im substantially U-shaped steel spring, one leg 18 of which is anchored in the receiving block 1, and whose other, parallel legs 16 in one, in the up-

Take block 1 formed slot 19 is housed. 30th

Slot 19 and legs 16 are arranged within the receiving block 1 that the leg 16 through the The edge region of the through-hole 2 runs through it, as is shown in FIGS. 1 and 3. Of the

The slot 19 is wider than the diameter of the leg 35

16 of the steel spring 17, so that the leg 16 seen from the through hole 2 at least as far in radial direction can resiliently evade that he himself

• α · ft

located outside of the hole 2.

The locking bolt 10 has at its end remote from the inast foot a chamfer 20, which is used when inserting the bolt 3 in the through hole 2 the To press leg 16 of the leg spring 17 radially to the side and thus enable the bolt 3 to be pushed in. As soon as the bolt 3 is in its in Fig. is the desired position shown, the leg 16 of the leg spring 17 engages in the circumferential groove 15 of the locking bolt 10 and the bolt 3 is thereby rotatable, but fixed in its soil position so as to be immovable in the axial direction. 15th

The force required to pull out the bolt 3 from the receiving block 1 is required, is defined by the interaction of the lower side wall of the circumferential groove 15 with the leg 16 of the leg spring 17

ned. To vary the release force su is the lower one Section of the locking bolt 10, from the lower side wall dsr circumferential groove 15, designed as follows:

As can be seen in particular from FIG. 5 results are in total

four possible positions A, B, C and D provided. One each of these possible positions is then in the functional position when they exactly match the leg 16 of the Leg spring 17 is facing, so when they are in the

1 shows to the right. The single 30

Positions A to D close each other an angle of 90 ° measured from the axis of the Carrier pin 8, a.

At position A, the end section. 21 of the Rast-35

bolt 10 has a lateral flat 22, which extends parallel to the axis of the locking bolt 10 and runs over the entire end section 21. From the-

stood the flat 22 to the axis of the locking pin 10 is equal to the distance from the bottom 23 of the circumferential groove 15 of this axis. It can be seen that in position A there are therefore none for leg 16 of leg spring 17 effective locking surface exists, so that in this position A no locking of the bolt 3 takes place. Accordingly, this position A also primarily serves the targeted Remove the bolt 3 from the received * block 1. Furthermore, in this position, easier insertion of the bolt 3 into the through hole 2 is of course also possible after the spring force has been applied of the leg 16 of the leg spring 17 does not have to be overcome.

In the position B, the end section 21 also has

one flat 24, which also runs parallel to the axis of the locking bolt 10 and is also in the Extends substantially over the entire end section 21.

The distance between the flat area 24 and the axis of the locking bolt In the case of position B, however, 10 is greater than the distance between the bottom 23 of the circumferential groove 15 and this axis, so that in this position B there is an effective locking surface 25 for the leg 16 of the leg spring 17, which, in cooperation with the leg 16, defines a relatively low release force.

In the position C, the lower side surface of the circumferential groove 15 has a bevel 26, which as a flat Surface is formed and extends from the bottom 23 of the circumferential groove 15 obliquely downwards at an angle of extends about 40. This bevel 26 ″ also defines a leg 16 of the leg spring 17 Locking surface, and the release force is defined here by the inclination of the bevel '26 "to the axis of the locking bolt 10. In the case of the present exemplary embodiment, by-the illustrated inclination achieves a release force, which is greater than the release force according to position B.

Finally, in position D, the locking surface is through the original lower side wall 27 of the circumferential

groove 15 defined. After the complete page 5

wall of the circumferential groove with the leg 16 of the leg spring 17 cooperates, in this position D there is an extremely firm locking of the bolt 3 in the receiving block 1 given.

The person skilled in the art is therefore based on the above description

clear that by turning the locking pin 10 within the through hole 2, the release force of the mast base from the sailboard can be varied. To it the user to enable the release force by hand, ins-15

In particular, to vary even with the bolts already inserted in the receiving block 1, the locking bolt 10 is non-rotatably connected at its upper end facing the rubber joint 4 to an actuating wheel 28, the diameter of which is greater than the diameter of the rubber ^y

joint 4. The actuating wheel 28 works to the defined Setting and holding the selected position A to D together with a locking device, which in the essentially comprises a latching head 29, which at the end

a spring pin 30 fastened in the receiving block 1 25th

To ensure sufficient elastic deflection of the latching head 29 is made possible by the spring pin 30 arranged within a guide slot 31 extending into the receiving block 1, which

a movement of the spring pin 30 in the radial direction 30

with respect to the axis of the bolt 3 allows.

The locking head 29 acts optionally with one of the circular segment-shaped Recesses 32, which on the circumference of the actuating wheel 28 at an angular distance of each-o

because 90 are trained * and each one of the Positions A to D correspond together, as can be seen from FIGS. 1 and 2. The latching head 29 has a

* · Nen lower cylindrical portion 33, whose Diameter is the radius of curvature of the segment of a circle Recesses 32 of the actuating wheel 28 is adapted. In the detent position, the lower section 33 pushes the Latch head 29 resiliently in one of the recesses 32, so that in this way the actuating wheel 28 in one of the Target positions A to D is held.

Furthermore, the latching head 29 has an upper, essentially one frustoconical section 34, the lower, maximum Oruchmesser is slightly larger than the diameter of the cylindrical lower portion and whose upper, minimum diameter is slightly smaller than the diameter of the lower section 33. The The upper section 34 is used when the bolt 3 is inserted into the through-hole 2 of the receiving block 1 to force or enable an orientation of the locking bolt 10 according to one of the positions A to D, even before the end section 21 of the locking bolt 10 has reached the leg 16 of the leg spring 17. Farther The upper section 34 facilitates the setting of one of the positions A to D. Finally, the prevents enlarged lower diameter of the upper section, which is in functional position on the upper edge of the Actuating wheel 28 rests, an unintentional slipping out of the mast foot from the bracket, if as Position the position A, which does not provide a latching of the locking bolt 10, is selected.

"0 In the following, the mast base anchoring according to Referring to Figures 6-10.

On the underside of the rubber joint 104 of the rest Not shown mast base of the rig of the sailor a support pin 108 is in turn attached, the lower End in a bore 102 of a receiving body 101 that is adapted to the diameter of the carrier pin 108 is stored. De.r., T, rä, ge.rs t.i.f t, 1.08 shows a transverse

cut semicircular ring groove 106 into which a fastening pin 107 engages tangentially, which in a corresponding bore 109 (see Fig. 9) a Locking bolt 110 is held, which, as in the case of the embodiment according to FIGS. 1 to 5, thus on the carrier pin 108 is rotatable but immovable. The locking bolt is located in its lower and middle area 110 in a bore of the receiving body 101 of corresponding diameter out. At the upper end of the locking bolt 110 there is in turn an actuating element on the latter 128 non-rotatably connected, which in the case of the present embodiment as an actuating lever 128 is formed, and, as will be described further below, can be locked in different locking positions is.

The RastbolzL.n 110 has at its lower end again _at a chamfer 120 and a circumferential groove 115 located here on to which, which is resiliently mounted in a slot 119 in the receiving body 101 with a leg 116 of a leg spring, on. The mode of operation of the slot, the spring and the bevel corresponds to that of the corresponding components according to FIG

the embodiment described above, so that there is no need to go into this again in detail.

The lower end section 121 of the locking bolt 110 has four operating positions E to H. Thieves-

Drive positions E and G (see Fig. 10) have flats 122 and 124, which the flat 22 according to Fig. 5 corresponds and extends to the bottom 123 of the circumferential groove 115. The opposite positions E and G thus define positions without detent. The position F at which the full side wall 127 of the circumferential groove 115 comes into effect, corresponds to position D according to FIG. 5 and thus represents the maximum latching force

the position H a bevel 126 is formed which corresponds to the bevel 26 according to FIG. 5 and thus defines a position of medium release force. The δ angle of the bevel 126 to the horizontal is how shown in Fig. 8, 25 °.

On the underside of the actuating lever 128 facing the receiving body 101, four conical locking recesses 132 are formed, which correspond to the positions E to Iv. As can be seen from FIG. 7, a locking pin 130 which is prestressed by a helical spring 129 is formed in the receiving body 101, which protrudes upward so far that it engages in one of the locking depressions 132 _and thus a locking of the actuating lever 28 in one of the positions E to H causes.

According to a further exemplary embodiment, not shown, discrete latching positions are not provided, as in the case of the two preceding exemplary embodiments, but rather the release force is essentially continuously adjustable. For this purpose, in particular the lower end section adjoining the circumferential groove 15 or 115 can have a spiral-shaped circumference in cross-section, whereby, depending on the angular position of the locking bolt, the two with the leg 16 bi.ji. 116 of the torsion spring interacting support surface can be varied continuously.

^ O Although in the case of the exemplary embodiments, niele 1 and 2 are preferred four locking positions each at an angle of 90 ° are provided, it is clear to the person skilled in the art that more or less locking positions are readily provided could be.

1 If «· · * · · · · * t 101 receiving body 2 19th 102 bore 1 3 REFERENCE LIST 4th Receiving block 104 rubber joint 5 Through hole 106 ring groove. » 5 6th bolt 107 fixing pin 7th Rubber joint 108 carrier pin 8th Metal insert 109 bore 9 Blind hole 110 locking bolts 10 inner thread 10 11th Carrier pin 115 circumferential groove 12th thread 116 legs 13th Locking bolt 14th drilling 119 slot 15th Screw head 120 chamfer 15th 16 shoulder 121 end section 17th drilling 122 flattening 18th Circumferential groove 123 bottom of the perimeter 19th leg nut 20th Leg spring 124 flattening 20th 21 leg 126 bevel 22nd slot 127 side wall of the 23 Chamfer Circumferential groove Zk End section 128 operating lever 25th Flattening 129 coil spring 25th 26th Bottom of the circumferential groove 130 locking pin 27 Flattening 132 snap-in recesses 28 Resting area 29 bevel 30th Side wall of the circumferential groove 30th 31 Operating wheel 32 Locking head 33 Pen 34 Guide slot Recesses 35 lower section upper section

Claims (1)

■ α _ __ Graduate engineer (HUS BROSE ° " ¹ BROSE D-8023 Munich-Pullach, WieneoStr ^ Te ^ OÖgj 7 9δ 5θ 7 $ IeIw 5 fo? 14 * bros d; Cables; «Patentibus- Munich Mistral Windsurfing AG, Alte Winterth-urer Strasse, CH-8303 Nürensdorf-Zurich, Switzerland Your _{reference: MS} 45 Day: 3Q. August 1983 Your ref: Date: ³ Re-ki PROTECTION CLAIMS 1) Detachable mast foot anchoring for a sail surfer with a mounting part attached to the sailboard and a formed on the end of the mast foot facing the sailboard, in a bore in the receiving part retractable bolt, with a device for adjusting the release force of the connection between Receiving part and bolt is provided in which, by turning the bolt, optionally different Locking areas come into effect, thereby characterized in that the locking surfaces (25, 26, 27; 126, 127) on the bolt (10) are rigid are and there in the bore (2) of the receiving part (1) a cooperating with the locking surfaces, with respect to the bolt in the radial direction resilient spring element (16) is provided. 2) MastfuG anchorage according to claim 1, characterized in that that the bolt (10) has a groove (15) extending around the axis of the bolt, in which the spring element (16) engages, and that the locking surfaces (25 _r 26, 27) on which the groove (15) are formed in the sailboard end of the bolt (10) facing side surface (27). 5 3) mast base anchorage according to claim 2, characterized in that the end of the sailboard side Bolt (10) facing section (21) of the bolt between this end and the groove (15) at least one has a flat surface (24) parallel to the axis of the bolt, whose distance from the axis of the bolt is greater than that of the bottom (23) of the groove (15). 4) Mastfußuerankerung according to claim 3, characterized in, that, in the circumferential direction of the bolt (10) each offset, a plurality of flats (24) are provided, their distance from the axis of the bolt is different. 5) mast base anchoring according to one of claims 2 to 4, characterized in that the sailboard side End of the bolt (10) facing the side surface (27) of the Groove (15) has at least one bevel (26) inclined towards the end of the bolt on the sailboard side. 6) mast base anchoring according to claim 5, characterized in that that, offset in the circumferential direction of the bolt (10), a plurality of chamfering points (26) are provided whose inclination is different in each case. 30th 7) mast base anchorage according to claim 2 ,. characterized, that the end of the sailboard side Bolt (10) facing, parallel to the axis of the bolt extending portion (21) of the bolt between this end and the groove (15) from a minimum center distance to a maximum center distance, the is at most equal to the center distance of the bolt Jen- part of the groove, changes continuously. g 8) Mast foot anchoring according to one of claims 2 to 7, characterized in that the end of the bolt (10) facing the sailboard end (21) of the Bolt between this end and the groove (15) at least one flat surface parallel to the axis of the bolt .- (22), whose distance to the axis of the bolt is the same as that of the bottom (23) of the groove (15). 9) mast base anchoring according to one of claims 2 to 8, characterized in that the spring element (17) is formed by ..C a resilient leg (16) of a leg spring which, when the bolt (3) is inserted into the bore (2) of the receiving part (1), is tangential to the Groove (15) extends and at least partially engages in the groove (15). 10) mast base anchoring according to one of the preceding claims, characterized in that the bolt (10) carrying the locking surfaces (25, 26, 27) around his The longitudinal axis is rotatably mounted on the mast base (4). 11) mast base anchorage according to claim 10, characterized in that the bolt (10) rotatably with a handle (28) for adjusting the angular bearing of the bolt (10) is connected relative to the receiving part (1). 12) mast base anchoring according to claim 11, characterized in that between the handle (28) and the receiving part (1) a latching device (29] to 34) for Locking in the selected angular position is provided. 13) MastfuG anchorage according to one of claims 10 to 12, characterized in that the bolt (10) has a through hole (11) through which it is attached to an on The peg (8) attached to the end of the mast base on the sailboard side is rotatable but non-displaceably mounted.