DE2356908A1 - Ski safety fixing with limited retaining force - releases automatically under excess load to minimise danger to skier - Google Patents

Abstract

The ski fixing attachment housing is fastened by a hinge to an underlying plate which is screwed to the ski. Two jaws pivoting on two pins have end contours to match the toe of the ski boot. The other ends of the two jaws have rollers which press against the stop which is held by the spring against the fixed pins. A nose piece forming part of the stop fits under a fixed stop. Under normal ski-ring conditions the force exerted by the spring keeps the ski and boot firmly together but any excess twisting or axial load pushes the stop backwards and releases the jaws.

Description

DIPL-ING. GRÄMKOW DR. MÜLLER-BORE DIPL.-PHYS. DR. MANITZ DIPL-CH-IV. DR.DEUREL CIPL - '. NG. DARK FOREST

Munich, the M / go - G 2333 ^J

United building hardware factories Gretsch & Co. GmbH,

Leonberg

Safety ski binding

The invention relates to a safety ski binding, in particular a toe piece, with two shoe soles at least partially laterally encompassing side jaws, which are each pivotable about a vertical axis on one of the Ski attached base plate and fixed by a spring-loaded yoke acting on them in a normal position are held, due to a locking member-locking curve connection between the side jaws and yoke a lateral evasion of the side jaws from a predetermined side force while pushing away the yoke against the spring force and exceeding a dead center is possible.

Such safety ski bindings, which are used in particular as toe pieces, allow in the event of a Torsional stress on the foot a lateral pivoting of the side jaws, so that the shoe is released, before the leg has broken (DT-OS 1 946 461).

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The aim of the present invention is to provide a safety ski binding of the type mentioned at the beginning create, which with a simple manufacturing method and compact structure a wide range of options for the selection suitable triggering characteristics guaranteed. In particular, the safety ski binding should be able to be able to absorb harmless short-term side impacts without triggering immediately.

To achieve this object, the invention provides that the yoke can be pushed away from the shoe sole against the force of the spring is and the locking member, the locking curve in the normal position touches the outside and when the side is released, it runs inwards on the locking curve relative to the associated side jaw. There the spring generally acts centrally on the yoke, the beginning of the locking curve can be relative to dead center be steep and long, without the side jaws already having a large one up to reaching the dead point Must have performed swivel movement. After the dead center has been exceeded, there is still a sufficient range of motion for the side jaws for safe triggering and releasing of the shoe. Also enables it the construction according to the invention, the yoke and possibly also the spring at least partially between to accommodate the side jaws, which leads to a space-saving and compact design.

It is particularly useful if the yoke is laterally up to essentially the height of the vertical axes of rotation the side jaw extends. This allows a substantial part of the area of a ski half for the Accommodation of the locking curve are exploited. So it stands for the accommodation and training of the locking curve

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considerable space available. This in particular facilitates the production and processing of the critical locking curves simplified.

The vertical axes of rotation are preferably arranged near the associated side edge.

The yoke is expediently symmetrical to the longitudinal center axis. A helical spring supported on the base plate preferably engages the central axis from the front on the yoke. The space-saving and compact structure is further promoted by the fact that the spring is in a recess of the yoke engages.

According to a first advantageous embodiment, the side jaws point on their lever arm facing away from the sole each a locking member, preferably designed as a roller on, which cooperates with a locking cam on the yoke that is resiliently pressed against it. To ensure a The yoke should have sufficient stability in the normal position when the side jaws are in the normal position, except for the latching members also rest on two vertically directed stop rods arranged symmetrically to the longitudinal center axis. The stop rods are expediently encompassed by the yoke so far that when they are pivoted out one side jaw, the stop rod lying on the other side of the central axis as a swivel joint for the yoke works. The stop bars are preferably on the side facing away from the shoe sole and outside of the Arranged locking members.

In order to achieve a clear alignment of the side jaws in the normal position, these advantageously hit in

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the normal position with the lever arm facing away from the sole on the outside of the housing.

The release force can preferably be changed by that the bias of the coil spring acting on the yoke is adjustable.

The yoke is expediently between the base plate and the top of the housing slidably guided.

According to a particularly preferred embodiment, the yoke thereby becomes a further advantageous use supplied that the base plate can be swiveled up about a transverse axis at the front and by one in the vertical direction effective locking connection, of which one element is provided on the yoke and the other is ski-proof, below one predetermined vertical force is held in the lower normal position. Because of this training, this ensures Yoke at the same time also the height release of the binding.

A practical embodiment provides that on the side of the yoke facing away from the attack side of the spring a latch is provided which cooperates with a counter-latch fixed to the housing. The counter-rest extends expediently through an opening in the base plate.

In order to be able to adjust the height release, the counter-detent preferably has an adjustable incline Locking edge on which the locking lug slides away.

Another particularly preferred embodiment is characterized in that the locking curve on the side

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bake and the locking members are provided on the yoke. Included . the side cheeks are preferably on the one facing away from the shoe Articulated side of the yoke, the side jaws expediently have recesses for receiving the Yoke arms on, wherein the recesses are limited on the side facing the shoe by the locking curve. the Locking members expediently rest in the normal position in depressions at the outer end of the locking curves.

The embodiment described above enables a particularly space-saving and compact design by removing the yoke and at least a substantial part of the Helical compression spring are arranged completely in the space between the side jaws.

It is particularly punctiform when the counter-detent of the height release by a separate spring, which is weaker than the yoke spring, pressed against the latch on the yoke is. In this way, a three-point support of the yoke on three locking cams is avoided and one at the same time independent adjustment of the height release guaranteed by the separate spring, for example by means of a Adjusting screw is made changeable in its bias.

In order to ensure that the side jaws swivel away to the side in the event of a side release, According to a further embodiment, these can be connected to a handlebar via a vertical pivot axis be, which extends away from the shoe and is attached to the base plate so that it can pivot about a further vertical axis is, with the side jaws up to "exceed the Dead center of the locking curve are guided in such a way that up to

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then pivoting takes place essentially only about the vertical axis facing away from the shoe. In this way the side jaw folds down around the first-mentioned vertical pivot axis after the dead center has been exceeded outside, so that the shoe is suddenly released.

In a further particularly advantageous embodiment it is provided that the sole in the axial direction is only held by the side jaws attacking it at an angle and has so much leeway forwards that at a violent axial movement of the shoe sole forwards at least one side jaw to over the dead center is swiveled out. Because of this training, which only makes sense with a toe piece, the Binding is also lost in the event of a so-called sliding fall, in which an axially forward-facing fall on the ski boot Force is exerted. The safety ski binding according to the invention thus enables the side release as a whole to both sides, the height release and the release with an axially forward excessive load. The sliding lintel release force can, among other things, by choosing a suitable inclination of the Side jaws are chosen with respect to the shoe sole.

The hold-down device is expediently an angle, one leg of which overlaps the sole and the other of which Legs possibly at a distance of the clearance from the sole on a firmly connected to the base plate Housing is preferably attached adjustable in height.

According to a further embodiment, the hold-down device is a role that engages over the shoe sole and around a

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vertical axis is rotatably mounted on the housing and / or the base plate, with between, the shoe sole and the axis, if any, the clearance is located. The role expediently has one the axle seated part with a reduced diameter, between which and the sole is the clearance .

The compact structure is promoted by the fact that the areas of the hold-down device located at the level of the sole between the side jaws are arranged.

In a further embodiment, the hold-down is an arm screwed to the top of the housing, the pivotable about a transverse axis by the screw and by means of a cylindrical tooth connection with the housing connected is.

The hold-down devices can also be attached to the side jaws so that they can be adjusted in height, but care must be taken is .that between the hold-downs and the shoe upper leather there is sufficient leeway if it should also be possible to trigger it in the event of a sliding fall.

The invention is described below, for example, with reference to the drawing; in this shows:

Fig. 1 is a partially sectioned plan view of the toe piece according to the invention,

Fig. 2 is a section along line H-II in Fig. 1,

Fig. 3 is a partial plan view of a further embodiment a toe piece according to the invention and

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2356903.

Fig. 4 is a section along line IV-IV in Fig. 3,

5 shows a partially sectioned plan view of a further embodiment,

6 shows a section along line VI-VI in FIG. 5,

7 shows a partially vertical longitudinal section of another advantageous embodiment,

FIG. 8 is a partially sectioned top view of a further preferred embodiment and FIG

9 shows a vertical longitudinal section of a further advantageous embodiment of one according to the invention Safety ski binding.

According to FIGS. 1 and 2, a base plate 33 is screwed to a ski 14, which has a transverse axis located at the front 29 is articulated to a base plate 17. A housing 20 is attached to the base plate 17, which on its side facing the shoe sole 11, height-adjustable, carries a sole hold-down device 18 in such a way that A clearance 19 still remains between the housing 20 and the vertical part of the hold-down device 18.

The side brackets can be pivoted about vertical axes 15, 16 12, 13 are hinged to the housing 20 and the base plate 17, respectively. It is useful here that the edges 34 of the side jaws 12, 13 engaging the shoe sole 11 run obliquely, in such a way that when the shoe sole 11 is pushed forward, there is also a transverse force on the side cheeks 12, 13 is produced.

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The side jaws 12, 13 protrude forward over the pivot axes 15, 16 and carry on these lever arms as latching members acting rollers 22, which cooperate with locking cams 23 of a yoke 24, which is relative to the longitudinal center axis 25 of the front jaw is symmetrical. At its front end, the yoke 24 has a substantially frustoconical recess 28 which receives a helical spring 27.

The locking cams 23 run at their lateral front ends in Teilzylxndrischen joint recesses 35, in which housing-fixed stop rods 26 engage. the Helical spring 27, which is supported at the front on an adjusting screw 36 that can be screwed into the housing 20, presses this Yoke 24 against the stop rod 26 and the locking roller 22.

As can be seen particularly clearly from FIG. 2, is the yoke 24 also has a latching connection 30 with the bottom plate 33 in connection. The locking connection 30 consists of a locking lug 31 at the rear end of the yoke 24 and from a ski-fixed counter-catch 32, which has a front inclined edge 37, which with the Latch 31 is engaged. When the hold-down device 18 is moved up, the housing plate 17 pivots about the transverse axis 29, the locking lug 31 sliding up on the locking edge 37 while the helical spring 27 is compressed.

The embodiment of FIGS. 3 and 4 is largely similar to that of FIGS. 1 and 2 with the exception that the Hold-down device 18 'is formed by a roller, which is rotatable about an axis 21. This makes the side release easier. By means of a screw 40, one the roller 18 'encompassing threaded bracket 38 and a fixed to the housing Stop 39 can free on the axis 21

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about a vertical axis rotatable roller 18 'in height adjusted and adapted to the shoe sole thickness.

In addition, according to FIG. 4, the counter-detent 32 is around = a transverse axis 41 adjustable so that the inclination of the locking edge 37 can be changed. This means that the release force of the Front jaw adjustable in the vertical direction independently of the compression of the spring 27.

5 and 6 show a further Auslihrungsform, at however, the locking cam 23 on the side jaws 12, 13 and the locking member 22 on the yoke 24 are provided. to for this purpose the yoke 24 is shaped in the manner shown and extends with its arms in recesses 44, 45 inside the side jaws 12, 13, which in this Trap at 42, 43 are hinged to the base plate 17. The articulation points 42, 43 are therefore present in this case the locking curve and the yoke. In the normal position shown, the latching members 22 each rest in a depression 46.

7 shows an embodiment in which not only the height release can be adjusted independently of the side release is, but also the critical three-point support of the 'yoke 24 on three locking curves is avoided. For this purpose, a helical compression spring 47 is connected between the adjusting screw 53 and the counter-detent 32, which is weaker than the yoke spring 27. In this way, the latching members 22 are in a safe contact on the locking cams 23, since the spring 47 may be compressed somewhat by the yoke spring 27 can be. The height release can then be independent of the side release by adjusting the adjusting screw 53 can be made.

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In the embodiment according to FIG. 8, the side jaws are 12, 13 initially via a vertical pivot axis 48 with a handlebar extending axially away from the shoe connected, which in turn is mounted pivotably about a vertical axis 50 on the housing. The side jaws 12, 13 are also guided in a manner not shown in the lateral direction that in the first area the triggering movement a pivoting of the side jaws 12, 13 takes place around the vertical axis 50 and only after the dead center of the locking cam 23 is exceeded, a pivoting takes place about the vertical axis 48 is possible. This enables the shoe to be released extremely quickly in the event of a side release guaranteed.

Fig. 9 shows an embodiment with a very simple and advantageous design of a height-adjustable Sole hold-down device 18 ". The hold-down device 18" has a cylindrical end at its end remote from the shoe or spherical ring gear, which has a tooth connection with a correspondingly designed ring gear on the housing 20 51 forms which fix the hold-down device 18 ″ in various angular positions about a transverse axis enables. The hold-down device 18 ″ is detachably screwed to the housing by means of a screw 52. A sector-shaped one Opening 54 in the hold-down device 18 ″ enables unhindered pivoting when the screw 52 is loosened of the hold-down device 18 "about the said transverse axis.

The function of the safety ski binding according to the invention as a toe piece is as follows:

When stepping into the binding, the shoe sole is under the hold-down device 18, which is suitably adjusted in height,

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18 ', 18 "are pushed in until the shoe sole 11 hits the side jaws 12, 13. Then the heel binding shown closed in the usual way.

In the event of excessive torsional stress, the relevant side jaw 12 or 13 is pressed outwards, with the locking roller 22 runs on the locking cam 23 while pushing back the yoke 24 against the force of the spring 27. The yoke 24 pivots about the stop rod 26 located on the other side of the central axis 25.

As soon as the locking roller 22 has passed the dead center of the locking cam 23 has, the relevant side jaw 12 or 13 snaps into the open position and the foot is released.

By pressing in the disengaged side jaw, the binding can then be brought back into its operational position the front lever arm of the relevant side jaw 12 or 13 comes to a stop on the housing 20.

In the event of an excessive axial load on the ski boot sole 11, both side jaws are due to the inclined Trailing edges 34 pressed outwards, with both locking rollers 22 running on the associated locking cams 23 and the Spring 27 is compressed. The clearance 19 must now be dimensioned so large that both side jaws 12, 13 the Have exceeded the dead center of the locking curves 23 before the toe of the shoe comes to rest on parts fixed to the housing. Because of this design, both side jaws 12, 13 snap outward, with the height release at the same time is released.

In the event of an excessive load on the hold-down device 18, 18 'in the vertical direction, the locking lug 31 slides afterwards

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Figs. 2, 4, 7 and 9 on the locking edge 37 upwards, wherein the yoke 24 is under compression of the spring 27 also moves forward or the counter-detent 32 moves backwards with compression of the spring 47 (FIG. 7). In the process, the side jaws 12, 13 may also loosen. As soon as the locking lug 31 reaches the foremost point the counter-detent has exceeded 32, the binding snaps in the vertical direction.

The yoke 24 thus enables the front jaw to be triggered in the event of excessive torsional, axial and vertical loads.

The east members 22 can be used as rollers or as sliding elements be trained. In Fig. 5, the two possibilities are illustrated on the left and right of the central axis. Of course, in practice the design must be the same on both sides.

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Claims (32)

Claims 1 .J safety ski bindings, especially toe pieces, with two side jaws which at least partially encompass the side of the shoe sole, each around a vertical axis pivotally attached to a base plate attached to the ski and by an engaging on them spring-loaded yoke are held in a Wormallage, due to a locking member-locking curve connection between the side jaws and the yoke a lateral deflection of the side jaws from a predetermined side force by pushing away the yoke against the spring force and exceeding a dead center is possible, thereby characterized in that the yoke (24) against the force of the spring (27) from the shoe sole (11) can be pushed away and the latching member (22) touches the latching cam (23) on the outside in the normal position and when triggered from the side relative to the associated side jaw on the locking curve (23) runs inward. 2. Safety ski binding according to claim 1, characterized in that the yoke (24) is laterally up to essentially the height of the vertical axes of rotation (15, 16; 42, 43) of the side jaws (12, 13) extends. 3. Safety ski binding according to claim 1 or 2, characterized in that the vertical axes of rotation (15, 16; 42, 43) near the associated ski side edge are arranged. 4. Safety ski binding according to one of the preceding claims, characterized in that -15-509820 / 0645 that the yoke (24) is symmetrical to the longitudinal center axis (25). 5. Safety ski binding according to one of the preceding claims, characterized in that that a helical spring (27) supported on the base plate (17) from the front on the central axis (25) on the yoke (24) attacks. 6. Safety ski binding according to claim 5, characterized in that the spring (27) in a recess (28) of the yoke (24) engages. 7. Safety ski binding according to one of the preceding claims, characterized in that that the side jaws (12, 13) on their lever arm facing away from the sole (11) each one, preferably as a roller have formed locking member (22), which is pressed with a locking cam (23) on the resiliently against it Yoke (24) cooperates. 8. Safety ski binding according to claim 7, characterized in that the yoke (24) at in Normal position located side jaws (12, 13) except on the latching members (22) also on two vertically aligned symmetrically to the longitudinal center axis (25) Stop rods (26). 9. Safety ski binding according to claim 8, characterized in that the stop rods (26) are so far from the yoke (24) that when pivoting a side jaw (12, 13) on the other side of the central axis (25) lying stop rod (26) as a swivel joint for the yoke (24) works. 509820/0645 -16- 10. Safety ski binding according to claim 8 or 9, characterized in that the stop rods (26) arranged on the side facing away from the shoe sole (11) and outside the latching members (22) are. 11. Safety ski binding according to one of claims 7 to 10, characterized in that the side jaws (12, 13) in the normal position with that of Strike the lever arm facing away from the sole on the outside of the housing (20). 12. Safety ski binding according to one of claims 5 to 11, characterized in that the The preload of the helical spring (27) is adjustable. 13. Safety ski binding according to one of the preceding claims, characterized in that that the yoke (24) is slidably guided between the base plate (17) and the top of the housing (20). 14. Safety ski binding according to one of the preceding claims, characterized in that that the base plate (17) can be pivoted up about a transverse axis (29) at the front and through a vertical axis Direction of effective locking connection (30), one of which is provided on the yoke (24) and the other is ski-proof, is kept below a predetermined vertical force in the lower normal position. 15. Safety ski binding according to claim 14, characterized in that the attack On the side of the yoke (24) facing away from the spring (27) a latching lug (31) is provided which cooperates with a counter-catch (32) fixed to the housing. 509820/0645 - ¹ ? - 16. Safety ski binding according to claim 15, characterized in that the counter-detent (32) through an opening in the bottom plate (17). 17. Safety ski binding according to claim 15 or 16, characterized in that the counter-detent (32) has a locking edge (33) which is adjustable in inclination and on which the locking lug (31) slides. 18. Safety ski binding according to one of claims 1 to 6 and 12 to 17, characterized in that the locking curve (23) on the side jaws (12, 13) and the latching members (22) are provided on the yoke (24). 19. Safety ski binding according to claim 18, characterized in that the side jaws (12, 13) hinged on the side of the yoke (24) facing away from the shoe (42, 43) are. 20. Safety ski binding according to claim 19, characterized in that the side jaws (12, 13) Have recesses (44, 45) for receiving the yoke arms. 21. Safety ski binding according to claim 20, characterized in that the recesses (44, 45) are limited on the side facing the shoe by the locking curve (23). 22. Safety ski binding according to one of claims 18 to 21, characterized in that the Latching members (22) rest in their normal position in depressions (46) at the outer end of the latching cams (23). -18-509820 / 0 645 23. Safety ski binding according to one of claims 18 to 22, characterized in that the yoke (24) and at least a substantial part of the Helical compression spring (27) are arranged completely in the space between the side jaws (12, 13). 24. Safety ski binding according to one of claims 15 to 23, characterized in that the counter-catch (32) of the height release by a separate Spring (47), which is weaker than the yoke spring (27), is pressed against the latching lug (32) on the yoke (24). 25. Safety ski binding according to one of the preceding claims, characterized in that the side jaws (12, 13) are connected via a vertical pivot axis (48) to a link (49) which extends away from the shoe and by another on the base plate Vertical axis (50) is pivotally attached, the side jaws (12, 13) being guided until the dead center of the locking cam (23) is exceeded that until then pivoting essentially only takes place around the vertical axis (50) facing away from the shoe (Fig . 8th). 26. Safety ski binding according to one of the preceding claims for use as a toe piece, characterized characterized in that the sole (11) in the axial direction only from the obliquely attacking it Side jaws (12, 13) is held and forward so much leeway (19) that with a violent axial movement of the shoe sole (11) forwards at least a side jaw (12, 13) is swung out past dead center. -19-509820 / 06 4 5 27. Safety ski binding according to one of the preceding Claims, characterized in that the hold-down is an angle (18), one leg of which engages over the sole (11) and the other of which Legs possibly at a distance of the clearance (19) from the sole (11) on one with the base plate (17) fixedly connected housing (20) is preferably attached in a height-adjustable manner. 28. Safety ski binding according to claim 26, characterized in that the hold-down device has a Roller (18) which engages over the shoe sole (11) and is rotatable about a vertical axis (21) on the housing (20) and / or the base plate (17) is attached, being between the shoe sole (11) and the axis (21) where applicable, the clearance (19) is located. 29. Safety ski binding according to claim 28, characterized in that the roller (18 ¹ ) has a part with a reduced diameter which is seated on the axis (21) and the clearance (19) is located between which and the sole (11). 30. Safety ski binding according to one of claims 27 to 29, characterized in that the areas of the hold-down device located at the level of the sole (11) (18, 18 ·) are arranged between the side jaws (12, 13). 31. Safety ski binding according to one of claims 1 to 26, characterized in that the hold-down device is a on the top of the housing (20) -20- .509820AO6AB is bolted arm (18 "), which is through the screw (52) and by means of a cylindrical tooth connection (51) is pivotably connected to the housing about a transverse axis. 32. Safety ski binding according to one of claims 1 to 26, characterized in that the Height-adjustable hold-down clamps on the side jaws (12, 13) are attached. 509820/0645 Blank page