EP0435974A1

EP0435974A1 - Device for releasably fastening a fin shaft

Info

Publication number: EP0435974A1
Application number: EP90908519A
Authority: EP
Inventors: Wolf-Dietrich Zander
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-05-09
Filing date: 1990-05-07
Publication date: 1991-07-10
Also published as: WO1990013472A1

Abstract

Dispositif pour fixer de manière amovible la tige (4) de la dérive dans la cavité prévue à cet effet (5) dans le logement de dérive agencé dans la partie inférieure d'une planche à voile. On met en prise la dérive (2) et sa tige (4), qui pivotent vers l'arrière, avec l'élément de fixation (6), qui est agencé dans la cavité (5), dans la partie antérieure du logement de dérive, et qui pivote vers l'avant. Lorsque l'on appuie sur son arête avant, la dérive, retenue par un câble d'arrêt (21), sort de la cavité.Device for removably fixing the rod (4) of the fin in the cavity provided for this purpose (5) in the fin housing arranged in the lower part of a windsurfing board. The fin (2) and its rod (4), which pivot backwards, are engaged with the fixing element (6), which is arranged in the cavity (5), in the front part of the housing. drifts, and swings forward. When you press on its front edge, the fin, retained by a stop cable (21), leaves the cavity.

Description

DEVICE FOR DETACHABLE FASTENING OF A FINLAND

DESCRIPTION

The invention relates to a device according to the preamble of claim 1, such a device is known from DE-PS 33 07 412.

Finned systems are predominantly used in sailing boards, in which the fin shaft is held in the receptacle of a fin box with vertical side walls running parallel to one another. It stands for. B. a transverse pin, which is located at the rear end of the fin shaft, as seen in the direction of travel of the sail board, engages with horizontally running grooves in the side walls of the receptacle. The front end of the fin shaft is fastened with a vertically extending locking screw which engages in the threaded bore of a metal plate within the horizontally running grooves. This type of fastening has the advantage that the fin inside the fin box in

Longitudinal direction can be positioned in different positions. However, open cavities in front of and / or behind the fin shaft inevitably arise within the receptacle, which have an unfavorable effect on the flow behavior of the sailing board.

A further deterioration in driving behavior occurs if the fin shakes or vibrates sideways while driving. If, in order to avoid such vibrations, the fin is held free of play in the receptacle, it can only be inserted into the fin box with greater force due to the parallel side walls of the receptacle. This problem is further exacerbated by sand contamination. Another disadvantage of rigidly attached fins is that the fin and / or the fin box can be damaged in the event of sudden loads on the front fin edge which occur when hitting an obstacle or when touching the ground. The same

REPLACEMENT LEAF Disadvantage adheres firmly to laminated fins, which are vibration-free and aerodynamically connected to the sail board. Furthermore, such fins cannot be changed.

In a fin attachment known from EP-OS 0 034 990, resilient webs are attached to the front and rear end walls of the fin box and are lockable with semi-cylindrical projections in corresponding recesses in the front and rear end faces of the fin shaft . With this type of attachment, the fin can deflect resiliently forwards and backwards relative to the sail board, which impairs the sailing properties of the sail board. In addition, the side walls of the receptacle here also run parallel to one another, which leads to the difficulties already described with the play-free fin seat.

From DE-OS 30 43 496 it is known to connect the rear end of a fin shaft engaged at the rear of the fin box with a fishing line in order to prevent the fin from completely detaching from the sailboard if it hits during a collision its front edge is separated from the sail board.

A fin box is known from DE-OS 34 40 553, the housing of which is anchored from the underwater ship in the sailing board through the board body to the deck.

From DE-PS 33 07 412 it is also known to hold the fin shaft between an elastic coupling block attached to the rear end of the receptacle and a rigid coupling member at the front end of the receptacle, with the fin following its front edge in the event of an impact at the rear releases from the front clutch, tilts from the receptacle and is completely released. In this fastening device too, the fin box has parallel side walls, so that the problem of simple, play-free fastening also arises here.

REPLACEMENT LEAF - 3 -

The object of the invention is to secure a fin in the receptacle of the type mentioned at the outset using simple means in a safe, aerodynamic and play-free manner, with a reliable release of the fin from the receptacle in the event of an impact load on its front edge and a rapid one Assembly or disassembly is guaranteed without great effort.

This object is achieved according to the invention by the characterizing features of claim 1.

Advantageous further developments and refinements of the device according to the invention result from the subclaims.

The invention is explained in more detail below using exemplary embodiments in the drawings. It shows:

1 shows a view of a sailing board with fin and fin box;

2 shows a section in the longitudinal direction through the fin box with the fin fixed;

3 shows a section transverse to the longitudinal direction through the fin box with the fin fixed;

4 shows a section in the longitudinal direction through the fin box with the fin pivoted out;

5 shows a detail section through a fastening element in its engagement with the fin shaft, which is secured by an additional screw connection;

6 shows a section in the longitudinal direction through the fin box with the fin pivoted out, the fastening member being pivotally mounted on the front fin shaft;

REPLACEMENT LEAF - 4 -

7 shows a section in the longitudinal direction through the fin box with the fin fixed;

8 shows a section in the longitudinal direction through a fin box of conventional design, but with a receptacle designed according to the invention, the thin line depicting a built-in fin;

9 shows a section transverse to the longitudinal direction of FIG. 8;

10 shows a section in the longitudinal direction through the fiππenkasten with fixed fin with a prefinished fastener and lockable safety rope fastening to the fiπnschaft;

11 shows a section transverse to the longitudinal direction, through the fin box / fin shaft with safety rope fastening;

12 shows a section in the longitudinal direction through the fin box when the fin is fixed with a catch rope fastening which can be hooked onto the fin shaft;

13 shows a section transversely to the longitudinal direction through the fin box / fin shaft with safety rope fastening;

14 shows a section in the longitudinal direction through a fin box when the fin is fixed, but with a snap member sprung in the horizontal direction at the front fin box area seen in the direction of travel;

15 shows a section transverse to the longitudinal direction through the fin box in the region of the snap member;

16 shows a section in the longitudinal direction through a fin box when the fin is inserted, but with a horizontal one

REPLACEMENT LEAF Direction of the spring-loaded snap member on the rear fin box area as seen in the direction of travel, a rigid latching member being located on the front fin box area thereof;

17 shows a section transverse to the longitudinal direction through the fin box in the region of the snap member;

18 shows a section in the longitudinal direction through the fin box when the fin is fixed, the rear pivot point, viewed in the direction of travel, being flexibly attached to the fin box;

19 shows a section transverse to the longitudinal direction through the fin box without fin;

20 shows a detail longitudinal section through a fiππenkasten with a fin releasably hooked onto a safety rope;

21 shows a section transverse to the longitudinal direction through the fin boxes;

22 shows a detailed longitudinal section through a resilient locking member in the front region of the fin box;

Fig. 23 shows a longitudinal section through a fin box without additional

Arretieruπgshil f e;

24 shows a detailed longitudinal section through a fin box with a semi-flexible fastening element;

25 shows a section transverse to the longitudinal direction through a fin box without a fin;

Fig. 26 shows a section in the longitudinal direction through a fin box with variable fastening member, which in the sail board from

REPLACEMENT LEAF Underwater ship is anchored through the board body to the deck;

27 shows a detailed longitudinal section through a fin box with a variable fastening element;

28 shows a detailed longitudinal section through a fin box, the fin and the fastening member being wedged together:

29 shows a section transverse to the longitudinal direction through FIG. 28;

30 shows a detailed longitudinal section through a fin box with the fin fixed, the rear pivot point being resiliently mounted;

Fig. 31 is a bottom view of Fig. 30;

32 shows a section in the longitudinal direction through a fin box with the fin pivoted out and a variable fastening member;

Fig. 33 is a view of the variable fastener; and

34 shows a section in the longitudinal direction through a fin box with a fixed fin and a fastener pivotably mounted to the rear.

As can be seen from FIG. 3, in the device according to the invention the cross section of the fin shaft 4 and the receptacle 5 of the fin box 3 is trapezoidal. The fin 2 can thus be easily inserted into the receptacle 5 and wedged into it with a jerk. It is advantageous if the cross section or the wedge angle oC of the fin shaft 4 and the receptacle 5 are exactly identical. By installing the fin box 3 in the sailboard 1 (Fig. 1), the cross section

REPLACEMENT LEAF the receptacle 5 slightly compressed, so that a larger surface pressure between the fin shaft 4 and the side surfaces 9 of the receptacle 5 is generated when locking. The fin 2 is thus free from play in the receptacle 5 and can be easily removed from the receptacle 5 by a jerky movement. Vertical, oblique or circular webs 7, 31 or 56 on the side walls 9 of the receptacle 5 or partially cylindrical webs 20 on the bottom 8 of the receptacle 5 reduce the contact surface of the fin shaft 4 to the required minimum, so that possible impairments of the fin seat in the fin box are largely excluded by dirt.

As an additional attachment, the fin 2, as shown in FIGS. 2 and 4, can be secured in the receptacle 5 with a snap joint 11. For this purpose, a fastening member 6, which is pivotably mounted around a cylindrical pin 13 and has a partially cylindrical projection 14 which is at the rear, rotatably engages in a corresponding recess 15 in the front fin shaft 4. The fastening member 6 is expediently clipped detachably onto the cylindrical pin 14 with a clip lug 18 (FIG. 2). The rear end face of the fin shaft 4 engages with a partially cylindrical recess 16 pivotable about a pivot point 12 in a corresponding projection 17 of the rear wall of the receptacle 5. When the fin 2 is pressed vertically, the fin shaft 4 swings up together with the fastening member 6 . The fin shaft 4 is pressed against the fulcrum 12 and the fastening member 6 against the fulcrum 10 of the snap joint 11, the fastening member 6 (in particular Fig. 27 or 32) or the elastic buffer 46 (Fig. 18) being small be plumped together.

Upon further movement of the fin 2 upwards, the fin shaft 4 is automatically pressed upwards into the receptacle 5 by the fastening member 6. The fin 2 is now firmly seated, but it can be loosened in the same manner, but only in a declining order, when the front edge is hit, so that the fin 2 or the fin box 3 when it hits an obstacle or touches the ground not be damaged.

REPLACEMENT LEAF As shown in FIG. 34, the fastening member 6 can also be pivoted backwards at the rear end of the fin box in the direction of travel. In this arrangement, however, the fin 2 does not detach from its receptacle 5 as a result of impact-like loading on its front edge.

The end of a safety line 21 is detachably or rigidly fastened to the shaft 4 in the area of its rear fulcrum 12 (FIGS. 2, in particular FIGS. 10-13 and 20 and 21) or (FIGS. 26, 30 and 32), which runs over the apex of the fin shaft 4 along the bottom 8 of the receptacle 5 and is attached to the front pivot point 10 (cylinder pin 13). The tether 21 prevents the fin 2 from being completely detached from the sailboard 1.

There are various possibilities for releasably attaching the fishing line 21 to the fin shaft 4.

10 u. 11, the rear end 32 of the safety line 21 is fastened to the fin shaft 4 with a latch 33 in a simple manner.

Figures 12. u. 13 or 20 u. 21 show further fastening options. Here, the hook 34 is hooked approximately 180 ° against the position shown in FIGS. 12 and 21 on the cross pin 35 and rotated into the position shown. In the same way, the front end of the fishing line according to FIGS. 26, 28 and. 32 with the hook 68 at the pivot point 10, the cylinder pin 13 attached. The fishing line 21 is arranged in the fin box 3 so that the fin 2 cannot be used without first fastening the hook 34/68.

As FIG. 5 shows, the fastening member 6 can additionally be secured with a locking screw 27 which is screwed into a pull-out plug 28 which is inserted in a corresponding hole in the bottom 8 of the receptacle 5.

The release force of the fastener 6 is, as in Fig. 26 u. 27 shown, adjusted by means of wedge 57 via the screw 58 or adjusted with a rotatably mounted cylinder 68, FIGS. 32 and 33, flattened on both sides.

REPLACEMENT LEAF To pivot the fin into the fin box, the wedge 57 is expediently loosened, so that gaps 59 are formed between its flanks and the keyway of the fastening member, as a result of which the fastening member between the articulation point 11 and the pivot point 10 becomes flexible. The fin can now be easily swung in or out.

Likewise, the fastening member becomes rigid or flexible as required by a 90 ° rotation of the flattened cylinder 68.

As an alternative to the previously described exemplary embodiment, the fin 2 according to FIG. 7 can also be fixed with a preferably trapezoidal wedge, which forms the rear part of the pivotable fastening member 29 in the direction of travel, and by means of a screw 27. The fin 2 with the fin shaft 4 is pressed into the receptacle 5 by hand. The partially cylindrical webs 20 located in the bottom 8 of the receptacle 5 engage in corresponding recesses 25 in the fin shaft 4, so that a rear nose 23 of the fin shaft 4 slides against a corresponding recess 24 in the rear side wall of the receptacle 5.

The partially cylindrical recesses 25 on the fin shaft 4 are expediently somewhat wider than the partially cylindrical webs 20, as a result of which

Tolerance wedge gaps 26 result. Subsequently, the fastening member 29 is inserted and pulled by means of the screw 27 with one flank against the corresponding front end face of the fin shaft 4 and with the other flank against the front end face of the receptacle 5, the fin shaft 4 to the rear against the recess 24 in the the rear boundary surface of the receptacle 5 is pressed and is firmly seated.

Since the screw 27 engages in a pull-out dowel 28 (FIGS. 7 and 8), the fin 2 can also slide backwards out of the receptacle 5 in this type of fastening when it hits an obstacle, the fastening member 29 with screw 27 and pivot dowels 28 downwards.

As shown in FIG. 28, the fin shaft 4 can also be wedged with a fastening member 60, which has only one wedge surface 67. The rear part of the fin shaft 4 can, according to FIG. 26 or 30

REPLACEMENT LEAF be designed. A depth stop 61 on the receiving base 8 prevents the fin shaft 4 from being sunk too deeply in the receptacle 5.

A further exemplary embodiment of a snap joint 11 is shown in FIG. 6. The fastening member 30 is pivotally attached to the front of the fin shaft 4, the front end face of the fastening member 30 in the direction of travel as well as the rear contour 16 of the fin shaft 4 being loosely pivotably mounted.

14/15, a horizontally resilient snap member 36 with its contour 37 snaps into the corresponding fin shaft contour at the front area of the fin box 3. The snap member 36 is expediently supported by a block 38 made of elastomeric material or by other suitable measures in order to ensure a permanently sufficient contact pressure.

16/17 shows a fastening option in which, in contrast to FIG. 14/15, the rear pivot point 40 is designed as a horizontally resilient snap member 39, a buffer 42 made of elastomeric material or other suitable measures also ensuring permanent contact pressure here. Afford. The locking member 41 on the front fin box end wall is rigid.

FIGS. 14 and 16 can also be combined with one another so that the rear pivot point 40, as a horizontally resilient snap member 39, engages with the front contour 37 of the horizontally resilient snap member 36.

A further locking possibility is shown in FIG. 22. The fin shank 4 engages with its front end face in a compression spring bolt 49/59. The holding force could also be varied using an adjusting screw (not shown).

23 shows a fin box with a trapezoidal receiving cross-section, the receiving cross-section also preferably being trapezoidal in the longitudinal direction. The fin 2 is here by the surface pressure

REPLACEMENT LEAF held in the receptacle 5 between the webs 7 and the fin areas 9 (FIG. 3).

24, the fastening member 6 is additionally equipped with an elastic buffer 51, which enables a softer engagement or release of the fin.

FIGS. 18, 30 and 31 show, among other things, pivot points 12 which are flexibly or resiliently mounted to the rear, the contours 17/44 of which yield slightly resiliently to the rear in the event of an impact on the front edge of the fin and thus ensure reliable release by the fastening member 6, the fin 2 guarantee. 30 and 31, the restoring force (F) can be varied via a compression spring 65 by means of an eccentric tensioner 66 or other suitable measures.

Of course, other types of fastening can also be provided in connection with the described, trapezoidal profiled receptacle 5, as shown using a known screw connection according to FIGS. 8 and 9.

In this case, however, the fin 2 cannot come out of the receptacle 5 without damage when it hits an obstacle. On the other hand, the described types of attachment according to FIGS. 2, 4-7, 10-14, 16, 18, 20-22, 24, 26, 28, 30, 32 and. 34 can also be used in known recordings with vertical side walls running parallel to one another.

However, the disadvantages described above with regard to a play-free seat would not then be eliminated.

REPLACEMENT LEAF

Claims

DEVICE FOR DETACHABLE FASTENING OF A FINNISH ENTITY

1. Device for releasably fastening a fin shaft in the

Receiving a fin box embedded in the underside of a sail board with a fastening member which is arranged in the receptacle at the front end of the fin box and can be clamped to an adjacent end face of the fin shaft, a rear face of the fin shaft facing one in the direction of travel adjacent rear end face of the receptacle is pressed, characterized in that the fastening member (6, 29, 60) is pivotally mounted forward in the direction of travel.

2. Device according to claim 1, ¬ dadurchgekenn lines, ^'that the receptacle (5) in a sectional plane transverse to the direction of travel has a trapezoidal cross-section, the Ein¬-opening (22) is wider than the bottom (8) of the receptacle (5) , and that the cross section of the fin shaft (4) corresponds in its fastening area to the trapezoidal cross section of the receptacle (5).

3. Device according to claim 1 or 2, so that the side faces (9) of the receptacle (5) are provided with webs (7, 31, 56).

REPLACEMENT LEAF - 13 -

4. The device according to claim 3, so that the webs (7, 31) run vertically or obliquely in accordance with the direction of insertion of the fin shaft (4) into the receptacle (5).

5. Device according to one of claims 1 to 4, so that the bottom (8) of the receptacle (5) is equipped with one or more, preferably part-cylindrical transverse webs (20; Fig. 7) or (61; Fig. 28).

6. Device according to one of claims 1 to 4, characterized in that the fastening member (6) at its rear end viewed in the direction of travel has a preferably partially cylindrical projection (14) which in a corresponding recess (15) on the front end of Interfaces (4) engages.

7. Device according to one of claims 1 to 6, characterized in that the rear end face of the fin shaft (4) has a preferably partially cylindrical recess (16) which in a corresponding, preferably partially cylindrical projection (17) seen in the direction of travel engages rear end of the receptacle (5).

8. Device according to one of claims 1 to 6, characterized in that the fastening member (6, 29, 60) at its front region seen in the direction of travel, a rotary bearing (10) transversely to the direction of travel in both side walls (9) of the receptacle (5) ge ¬ is stored.

9. The device according to claim 8, d a d u r c h g e k e n n ¬ z e i c h n e t that the fastening member (6, 29, 60) has a Klipp¬ nose (18) for detachable clipping on the cylinder pin (13).

10. Device according to one of claims 1 to 9, that the cross-section of the fastening member (6, 29, 30) corresponds to the trapezoidal cross-section of the receptacle (5).

REPLACEMENT LEAF

11. The device according to one of claims 1 to 10, characterized in that on the fin shaft (4) in the region of its rear pivot point (12) the end of a safety line (21) is fastened, which is between the apex of the fin shaft (4) and the The bottom (8) of the receptacle (5) runs to the front pivot point (10) of the fastening member (6) and is fastened there.

12. The device according to one of claims 1 to 11, that the fastening member (6, 29, 60) can be locked in its pivoted-in position by means of a locking screw (27, 62).

13. The device according to one of claims 4 to 12, that the fin shaft (4) has recesses (25) on its apex which engage in the partially cylindrical webs on the bottom (8) of the receptacle (5).

14. Device according to one of claims 12 or 13, characterized in that the locking screw (27) for the fastening member (6, 29, 60) is screwed into a pull-out plug (28) which in a corresponding hole in the bottom (8) of the receptacle (5) is inserted.

15. The device according to one of claims 1 to 14, that the fastening member (6) is designed in the form of a prefinel (43).

16. Device according to one of the preceding claims, that the catch line (21) is releasably attached to the fin shaft with a bolt (33), hook (34) or other suitable means.

17. Device according to one of the preceding claims, since ¬ characterized in that the rear pivot point seen in the direction of travel (12; Fig. 18 or 40; Fig. 16) in the fin πenkasten flexible (46) or resilient (Fig. 30 and 31) is stored.

REPLACEMENT LEAF - 15 -

18. Device according to one of the preceding claims, characterized in that the fastening member (29) at the rear end viewed in the direction of travel has a trapezoidal wedge which, when the screw (27) is tightened, against the corresponding wedge surface of the fin shaft (4) and the front face of the fin box (3) is pressed.

19. Device according to one of the preceding claims, that the fastening member (6; FIG. 4) is provided with a bore (47) for easier disassembly.

20. Device according to one of the preceding claims, that the front snap member (36; FIG. 14) is flexibly or resiliently mounted with the contour (37) when viewed in the direction of travel.

21. Device according to one of the preceding claims, characterized in that on the side walls (9) of the Finnenkasteπs (3) with a trapezoidal cross-section (Fig. 8 and 9) horizontally arranged grooves (48), each with an opening (49 ) downwards, for fixing the fin in a conventional way.

22. Device according to one of the preceding claims, that the fastening member (30; FIG. 6) is detachably connected to the fin shaft (4) at the articulation point (11).

23. Device according to one of the preceding claims, that the safety line (21) is releasably connected to the fin box (3) by a hook or other suitable means.

24. Device according to one of the preceding claims, d a - d u r c h g e k e n n z e i c h n e t that the fin shaft (4)

REPLACEMENT LEAF can be locked between a front flexible or resilient snap member (36, 37; FIG. 14) and a rear flexible or resilient snap member (39) / pivot point (40; FIG. 16).

25. Device according to one of the preceding claims, that the fin shaft (4) can be locked on its front end face with a compression spring bolt (49; FIG. 22).

26. Device according to one of the preceding claims, that the fastening member (6) between the joint point (11) and its pivot point (10) is provided with an elastic buffer (51; Fig. 24).

27. The device according to one of the preceding claims, that the side surfaces (9) of the receptacle (4) are smooth or are equipped with horizontal webs (52).

28. Device according to one of the preceding claims, since ¬ characterized in that the webs (56) run circularly on the side walls (9) of the receptacle (5), with the rear and the front pivot point (12) / (10) as the center.

29. Device according to one of the preceding claims, since ¬ characterized in that the fastening member on its side directed into the fin box between the articulation point (11) and its pivot point (10) is provided with a wedge (57) and its position with a screw (58) or other suitable means is adjustable.

30. Device according to one of the preceding claims, d a ¬ d u r c h g e k e n n z e i c h n e t that the restoring force of the rear spring-mounted pivot point (12) seen in the direction of travel by means of an adjustable compression spring (6) via a screw, one

Exenterspanner (66) or other suitable means can be varied.

REPLACEMENT LEAF

31. Device according to one of the preceding claims, that the fin box case (3) is anchored in the sailing board (1) from the underwater ship (54) through the board body (53) to the deck (55).

32. Device according to one of the preceding claims, since ¬ characterized in that the fastening member (60) at the rear end viewed in the direction of travel has a wedge surface (67) which, when the screw (62) is tightened against the corresponding wedge surface of the fin shaft ( 4) is pressed.

33. Device according to one of the preceding claims, since ¬ characterized in that the fastening member on its side directed into the fin box between the hinge point (11) and its pivot point (10) with a flattened on one or both sides, rotatably mounted Cylinder (69) is provided.

34. Device for the releasable fastening of a fin shaft in the receptacle of a fin box let in on the underside of a sailing board with a fastening member which is arranged in the receptacle at the rear end of the fin box and can be brought into a clamping connection with an adjacent end face of the fin shaft, one in As seen in the direction of travel, the front end face of the fin shaft is pressed against an adjacent front end face of the receptacle, characterized by the fact that the fastening member (6, 29, 60) is pivoted rearward against the direction of travel.

REPLACEMENT LEAF