EP0008580A1

EP0008580A1 - Safety ski binding

Info

Publication number: EP0008580A1
Application number: EP79900197A
Authority: EP
Inventors: Hans Schmidt
Original assignee: Individual
Current assignee: Individual
Priority date: 1978-02-06
Filing date: 1979-08-28
Publication date: 1980-03-05
Also published as: FR2472940A1; CH641055A5; US4336955A; WO1979000591A1; DE2804986C2; DE2804986A1; FR2472940B1

Abstract

Sur la surface superieure d'un ski, a l'endroit du talon du soulier de ski est disposee perpendiculairement a l'axe du ski, une plaque-semelle (2) pivotable qui fait partie de la fixation de securite et qui ne peut s'en echapper. Cette plaque possede a son extremite avant une butee-avant (3) et a son extremite arriere une talonniere automatique (5) mise sous tension par l'action d'un ressort de facon a ce qu'une force frontale superieure a la resistance du ressort provoque la liberation du soulier de ski. Pour que lors d'une force excessive de rotation le soulier puisse malgre tout etre completement libere de la plaque-semelle (2) et par consequent du ski et pour qu'apres la liberation du soulier la plaque-semelle puisse revenir a sa position normale, cette derniere possede a l'endroit du gros-orteil et du talon du soulier de ski une glissiere (15, 16, 17, 18) qui assure son deplacement tandis que la talonniere automatique (5) possede un deuxieme degre de liberte. La liberation du soulier de ski a donc lieu apres un depassement de la resistance d'un ressort separe (36).On the upper surface of a ski, at the location of the heel of the ski boot is arranged perpendicular to the axis of the ski, a pivotable sole plate (2) which is part of the safety binding and which cannot be 'escape. This plate has at its end before a front stop (3) and at its rear end an automatic heel (5) tensioned by the action of a spring so that a frontal force greater than the resistance of the spring causes the release of the ski boot. So that during an excessive force of rotation the shoe can still be completely released from the soleplate (2) and consequently from the ski and so that after the release of the shoe the soleplate can return to its normal position , the latter has at the place of the big toe and the heel of the ski boot a slide (15, 16, 17, 18) which ensures its displacement while the automatic heel (5) has a second degree of freedom. The release of the ski boot therefore takes place after the resistance of a separate spring (36) has been exceeded.

Description

Safety ski binding

The invention relates to a safety ski binding with a sole plate rotatably mounted on the ski surface on the ski surface on a vertical axis and secured against lifting, which has a tip holder at its front end and a spring-loaded automatic heel unit for the ski shoe at its rear end that opens when the frontal load exceeds the spring resistance to release the ski boot.

In such a safety ski binding known from CH-PS 460 610, the toe holder attached to the sole plate has no safety function, but only serves as an abutment for the ski boot. The safety function when the skier is subjected to a sudden fall is taken over by a spring-loaded locking element attached to the ski, which at the same time secures the sole plate in its normal position parallel to the ski.

A major disadvantage of this safety ski binding is that the ski boot and thus the skier are connected to the ski in the event of a triggering of a swivel and thus a certain risk of injury remains. In addition, there is a risk that in one violent secondary impact of the ski on the ground due to the leverage of the ski boot, which is rotated, for example, transversely to the longitudinal direction of the ski and which is only torn away from the sole plate that is still connected to the ski via the pivot bearing.

In addition, reaching readiness for driving after such a swinging out of the sole plate is extremely cumbersome and tedious, because the skier generally has to open the automatic heel unit for the release of the ski boot first, for example with the ski pole, then the sole plate by hand and against the spring resistance of the locking element in the Swivel normal position, after which it is finally possible to re-enter the binding.

The object of the present invention is therefore to provide a safety ski binding of the type mentioned, in which the ski boot is released completely from the soleplate and thus also from the ski in the event of excessive lintel loading and when the soleplate is released again automatically after the ski boot has been released their normal position is pivoted parallel to the ski.

Starting from a safety ski binding according to the preamble of claim 1, this is achieved according to the invention in that the sole plate has a sliding guide that secures the lifting of the sole plate both in the toe and in the heel area and that the automatic heel unit for releasing the ski shoe in the event of excessive lintel load has a second degree of freedom and the release takes place after the resistance of a separate spring is exceeded. This also avoids the disadvantage of a constant relationship between the triggering resistance for frontal and lintel loading, which many plate bindings have, but which separate from the ski with the ski boot.

In a simple manner, a separate degree of freedom for the automatic heel unit for releasing the ski boot in the event of excessive lintel loading is achieved in that the automatic heel unit is articulated on a housing and the housing is arranged on the sole plate to be displaceable in the longitudinal direction of the ski.

It has proven to be useful that a lock controlled depending on the angle of rotation of the soleplate is provided between the housing and the soleplate.

A particularly rapid release of the automatic heel when the excessive turning load is reached is provided in that a helical compression spring is provided which is supported on the soleplate and acts on the housing of the automatic heel in the opening direction.

In a constructive embodiment of the invention, the automatic heel unit has a relief lever which is provided with a nose which forms the counter-stop of a stop on the sole plate which limits the displacement path of the housing. In the event of a turning camber, when the heel hold-down device is opened to re-enter the binding, it is automatically moved together with its housing on the ski to the entry position. In order in particular to be able to remove the safety ski binding according to the invention on the one hand during transport of the skis and on the other hand also to use it for second or third-party skis, the sole plate is arranged on the ski in an arbitrarily removable manner. This can be achieved, for example, by means of a bayonet lock.

In order to effectively protect the release mechanism against any ingress of snow, water, dirt or the like without impairing its safety function, it is provided according to a special proposal of the invention that the automatic heel unit is enclosed in a preferably flexible plastic jacket except for its sole hold-down device, which lies at least sealingly against the ski surface or a carrier element of the binding.

An exemplary embodiment of the subject matter of the invention is described in detail below with reference to the accompanying drawings. Show it:

FIG. 1 shows the front part of the safety ski binding in a longitudinal section with the ski boot sole indicated by dash-dotted lines,

FIG. 2 shows the same part as FIG. 1 in a view from above,

FIG. 3 shows the rear part of the safety ski binding as a continuation of FIG. 1,

Figure 4 shows the same part as Figure 3 as a continuation of Figure 2,

5 shows a partial cross section through the locking mechanism of the safety ski binding along the lines V-V of Figure 4 and

Figure 6 is a top view of part of the locking mechanism of the safety ski binding.

The safety ski binding according to the present invention shown in the drawings essentially comprises a sole plate 2 which is rotatably mounted on a ski 1 and which, with reference to FIGS. 1 and 2, has a tip holder 3 at its left end and at its left in FIGS. 3 and 4 shown right end carries a locking mechanism 4 and above it a conventional heel mechanism 5 which opens when the skier is subjected to excessive frontal loading.

The mounting of the sole plate 2 (see FIGS. 1 and 2) consists of an axle journal 8 fastened to a base plate 7 and a bearing bore 9 of a bayonet lock 11 secured in the sole plate by a leaf spring 10. The base plate 7 is together with one each with respect to the Figures 1 and 3 Z-shaped angles 12, 13 attached to the ski 1 by means of screws 14. The Z-shaped angles 12, 13 secure with their free ends 15, 16 facing the tip holder 3, the sole plate 2 by means of a riveted to the sole plate, also with respect to Figures 1 and 3 Z-shaped angle 17, 18 against lifting. To arbitrarily remove the soleplate 2, press a button 19 fastened to the leaf spring 10 and projecting through a bore in the soleplate, so that the free leaf spring end 20, which blocks the bayonet lock 11 from rotating automatically, releases it. Now the bayonet catch can be turned by 60 and then removed from the journal 8. By moving the sole plate 2 by a few millimeters in the direction of the ski tip, the Z-shaped angles 17, 18 are released from the ends 15, 16 of the angles 12, 13 and the sole plate can be removed from the ski. The soleplate is placed in the reverse order, and when the bayonet catch is inserted, it presses the free leaf spring end 20 downward, so that there is no need to press the button 19 here.

The tip holder 3 is rigidly connected to a support part 21 which laterally overlaps the sole plate 2 and which is arranged so as to be displaceable to adapt the safety ski binding to different shoe sizes. The adjustment takes place in stages via a toothed strip 22 provided on the sole plate 2, into which a toothed counterpart 23 can be inserted from below, which receives the head of a screw 24, which has a detachable connection between the tip holder 3 and the via a threaded bore 25 in the support part 21 Sole plate 2 guaranteed. In order to double the adjustment range for different shoe sizes, the support part 21 of the tip holder 3 is provided with a second threaded bore 26.

The Z-shaped bracket 13 fastened to the ski 1 in the heel area of the ski boot has at its right end with respect to FIG. 3 an axle journal 27 which carries a sliding roller at its upper end, which in a Guide groove 28 protrudes in a cam plate 29 shown in Figure 6 in the view from above. The cam disc is connected in an articulated manner by a pin 30 to a pull rod 31 which, in relation to FIG. 3, extends to the right through a supporting wall 32 of the soleplate 2 and ends with a thread 33 onto which a bolt 34 provided with an internal thread is screwed . This has a collar 35, on which one end of a compression spring 36, which is guided partly by the pull rod 31 and partly by the bolt 34, is supported and the other end of which rests on the support wall 32 of the soleplate 2. The bolt 34 projects with its free end through a wall 37 that closes the soleplate 2 and has a slot 38 there, so that the pretension of the compression spring 36 can be changed with the aid of a screwdriver.

An angle piece, only partially visible in FIGS. 3 and 4, is used to indicate the spring preload, one end of which is designed as an annular disk 39 guided on the bolt 34 and held between the compression spring 36 and the collar 35 and the other end of which forms a pointer 40, that appears in a window 41 of the soleplate 2 (see FIG. 4).

Symmetrical to the longitudinal axis of the soleplate 2, two sliding bolts 42, 43 and 44, 45 are fastened to the underside of each, which are supported on the outer contour of the cam plate 29 or rest against it when it is pivoted (see FIG. 6). The sliding bolts 42, 43 serve as abutments for the cam plate 29, which is under the load of the prestressed compression spring 36 via the pull rod 31, while the sliding bolts 44, 45 additionally guide the cam plate 29 when it is pivoted about one of the sliding bolts 42, 43 are provided. In the pull rod 31, a driver pin 46 is fastened, which with a corresponding longitudinal displacement of the pull rod in relation to FIGS. 3 and 4 strikes to the left on a locking lever 47 which is pivotably mounted in the sole plate 2 at 48 (see FIGS. 4 and 5) . As can be seen from FIG. 5, the locking lever is angled upward twice in a Z-shape and protrudes through a guide plate 50 which is provided with recesses for the locking mechanism and accommodates a housing 49 of the automatic heel unit 5 and which is secured to the by means of rivets 51 (FIGS Sole plate 2 is attached.

The free end of the locking lever 47 has a recess 52 (see FIG. 4), which secures a position of the support lever 54 pivotally mounted in the sole plate 2 in the sole plate 2 in its position according to FIGS. 3 and 4. The support lever is supported by a slide roller 55 mounted on its free end and a cross member 56 arranged in the housing 49 under the load of a compression spring 57 which is supported on the one hand on the support wall 32 of the soleplate 2 and on the other hand on the housing 49 (see Figure 4) arranged traverse is acted upon by a leaf spring 58 and is not fixed on the load side, so that this provides a certain longitudinal elasticity of the housing and thus the automatic heel unit 5 with respect to the tip holder 3 rigidly attached to the soleplate.

When the torsion load on the sole plate 2 exceeds the pretensioning of the compression spring 36, the sole plate 2 swivels in accordance with the direction of rotation about the ski-fixed axle pin 8. The sliding bolts 42, 43 attached to the underside of the sole plate take the cam plate 29 with them and the support wall 32 or the wall 37, the pull rod 31 and the bolt 34 connected to it. However, the cam plate 29 cannot follow the sole plate 2, but is forced by the ski-fixed axle journal 27 to pivot the sliding bolt 42 or 43 lying in the direction of movement of the sole plate, as long as the The sliding roller of the journal 27 is located in the part of the guide groove 28 which extends to the ski tip. Since the pull rod 31 is articulated on the cam, there is always a longitudinal displacement of the pull rod against the force of the compression spring 36 each time the sole plate is pivoted out, which increases its tension.

With an increase in the torsional force acting on the soleplate 2 until the triggering force is reached, the cam plate 29 is pivoted so much that the part of the guide groove 28 which extends towards the ski tip is released from the sliding roller of the axle pin 27 and this now lies from the one lying behind in the direction of movement End of the guide groove extending substantially approximately transversely to the longitudinal extent of the sole plate is received. These ends of the guide groove are designed so that the force of the compression spring 36 remains constant despite the further pivoting of the soleplate.

The trigger point is reached when the driver pin 46 swings out the locking lever 47 due to the longitudinal displacement of the pull rod 31 towards the ski tip, as a result of which the support for the support lever 54 and thus the automatic heel unit 5 is abruptly canceled. Due to the relaxing compression spring 57, the housing 49 and with it the entire automatic heel unit 5, consisting of sole hold-down 59, release lever 60 and a release mechanism (not shown) for frontal fall loading, in the guide plate 50 towards the end of the ski push so that the skier's shoe is released from the binding. The cross member 56 takes the support lever 54 in the housing 49 and pivots it counterclockwise with respect to FIG. 4 and counter to the force of a spiral spring 61 wound around the upper end of the journal 53. The movement of the automatic heel unit 5 towards the end of the ski is complete two stops 62 attached to the guide plate 50 on both sides (see FIG. 4) and two lugs 63 serving as counter stops on the relief lever 60 (see FIG. 3).

When the ski boot is released from the binding, the torsional load on the sole plate 2 acting on the compression spring 36 is abruptly ended, so that the sole plate is automatically pivoted back into its illustrated starting position by the relaxing compression spring 36.

To re-enter the safety ski binding after a turnstile release, the sole hold-down device 59 is opened by pivoting the relief lever 60 upwards, as is also the case with most conventional step-in bindings. The two support each other during this movement of the release lever

Lugs 63 on the stops 62 and roll like a pinion on a rack, whereby the automatic heel mechanism 5 is shifted towards the ski tip again. The support lever 54 is relieved and pivots back under the force of the spiral spiral spring 61, taking the locking lever 47, which is likewise under the influence of a somewhat weaker spiral spring 64, initially a little and then engages in the recess 52 of the locking lever after it has reached its end position . Then the safety ski binding is ready to start.

Claims

Claims:

1.Safety ski binding with a sole plate rotatably mounted on the ski surface in the heel area of the ski shoe on the ski surface and secured against lifting off, which has a tip holder at its front end and a spring-loaded heel mechanism for the ski shoe at its rear end, which is in the event of a frontal fall load exceeding the spring resistance for releasing the ski shoe, characterized in that the sole plate (2) provides a sliding guide (15,) in the toe area and in the heel area of the ski shoe to ensure that the sole plate (2) is lifted off.

17, 16, 18) and that the automatic heel unit (5) has a second degree of freedom for releasing the ski boot in the event of excessive lintel loading and the release takes place after the resistance has been exceeded by a separate spring (36).

2. Safety ski binding according to claim 1, characterized in that the automatic heel unit (5) has a housing (49) which is arranged on the sole plate (2) so as to be displaceable in the longitudinal direction of the ski.

3. Safety ski binding according to claim 1 and 2, characterized in that between the housing (49) and the sole plate (2) a depending on the angle of rotation of the sole plate controlled locking (4) is provided.

4. Safety ski binding according to claim 1 and 2, characterized in that a on the sole plate (2) is supported and the housing (49) of the automatic heel unit (5) is provided with a helical compression spring (57) acting in the opening direction.

5. Safety ski binding according to claim 1, characterized in that the automatic heel unit (5) has a relief lever (60) which is provided with a nose (63) which stops the counter-stop of the displacement path of the housing (49) (62 ) on the soleplate (2).

6. Safety ski binding, especially according to claim

1, characterized in that the sole plate (2) is arranged arbitrarily removable on the ski (1).

7. Safety ski binding according to claim 6, characterized in that the sole plate (2) is fastened to the ski (1) by means of a bayonet catch (11).

8. Safety ski binding according to one of the preceding claims, characterized in that the automatic heel unit (5) is enclosed up to its sole hold-down device by a preferably flexible plastic jacket which at least sealingly abuts the ski surface or a carrier element of the binding.