FR2598928A1 - Safety binding for a boot on a ski - Google Patents

Abstract

The invention relates to a safety binding for a boot on a ski 2. …<??>It comprises a jaw 3 capable of retaining one end of the boot against the ski 2, the said jaw being articulated about an axis 6 which is transverse relative to a body 5 connected to the ski 2. It also comprises energising means and, in particular, an energised pressure member 9 and a ramp 10 of the jaw. …<??>It is characterised in that the body 5 is carried by two lateral arms 11, 12 which are themselves articulated relative to the ski 2 about a transverse pin 13 at their lower end, and in that the lever 22 is articulated at its lower end relative to the ski 2 about a transverse pin 23 and is interposed in its upper part between the ramp 10 of the jaw 3 and the pressure member 9, 40 of the energising means. … …

Description

The invention relates to a safety binding of a boot on a ski.

More precisely, the invention relates to a binding intended to retain one end of the boot.

on the top surface of a ski.

Fasteners of this type are known and generally have a jaw capable of retaining one end of the

shoe, especially the rear end. The jaw is articulated around a horizontal axis and transverse to the longitudinal direction defined by the ski with respect to a body 10 connected to the ski.

In addition, energizing means exert an action on the jaw, which, when skiing, tends to remind the jaw towards the ski or, on the contrary, to tilt it towards the ski.

high, depending on the intensity of the stress exerted by the shoe sole on the jaw.

Usually energizing means include a

spring housed in the body, the initial compression of which is adjustable. The spring pushes against a ramp of the jaw a pressure member which, depending on the case, may be a sliding piston or an articulated rocker.

The ramp of the jaw usually has an elastic travel zone in contact with which the pressure member resiliently urges the jaw towards the ski, and a release zone in contact with which the pressure member pushes the jaw upwards. . The limit between

two zones define the triggering threshold of the binding.

Such fasteners are known in particular from the

French patents FR 2,338,060 and FR 2,494,591.

The drawback of these devices is that the user must provide a significant effort to manually release the binding, because in fact, he must provide an energy equivalent to the release energy that the shoe transmits to the boot.

the jaw for triggering when skiing.

Also, these bindings require a spring for the release and one or more other springs to provide elastic recoil of the binding, especially in order to follow.

the flexing movements of the ski.

Also, the initial compression of the recoil springs is generally not adjustable, and in particular does not adjust after the compression of the spring of the energizing means. However, there are fixings where the recoil springs can be adjusted in compression, but by means of

independent regulation of energizing means.

One of the aims of the invention is to provide a binding 10 for which the triggering energy to be supplied for a

manual release is less than that for a release when skiing.

Another object of the invention is to provide a binding which has common energy reserve means and common adjustment means to ensure both the elastic return and the elastic recoil of the binding and their adjustment. Advantageously, this object is achieved by the invention by using, in a particular embodiment, the spring 20 energizing means to further ensure the elastic recoil. Other objects and advantages of the invention will appear from

during the description which follows.

The safety binding according to the invention is characterized by the fact that: - the body is carried by two lateral arms which are themselves articulated with respect to the ski at their lower end around a transverse axis, - a lever is articulated to its lower end relative to the ski around a transverse axis and is interposed in its upper part between the ramp of the jaw and the pressure member of the energizing means, such that the thrust exerted by the pressure member on the ramp of the jaw is transmitted to said ramp by - 3 the intermediary of the lever, and varies according to the position of the arms

and the body in relation to the ski.

The invention will be better understood by referring to the description below, given as an indication, as well as to

drawings in annex which form an integral part thereof. Figure 1 shows a side view and in partial section of a binding, in a non-limiting mode of implementation.

work of the invention.

Figure 2 is a perspective view of the binding of Figure 1.

FIG. 3 illustrates the operation of the binding of FIG. I during a vertical stress exerted on the body. FIG. 4 illustrates the operation of the binding of FIG. 1 during a vertical stress exerted on the jaw. Figure 5 illustrates the operation of the

FIG. 1 during a horizontal recoil stress.

FIG. 6 shows the binding of FIG. 1 in a raised position.

Figures 7 to 12 illustrate different variants of

realization of the invention.

The binding shown in the figures is of the type suitable

to retain the heel of a shoe.

However, the invention also applies to a binding intended to retain the front of a shoe.

There is shown in Figure 1 a safety binding 1 which is integrally connected to the upper surface of a

ski 2.

The binding 1 shown comprises a jaw 3 capable of

retain the sole of the shoe at the level of a sole clamp 31 which is intended to retain the heel of the sole.

In known manner, the jaw 3 preferably comprises in

its lower part a tongue 32 on which the sole of the shoe comes to rest when putting on the boot.

- 4 The binding 1 also comprises a body 5 connected to the ski 2 with respect to which the jaw 3 is articulated about a horizontal axis 6 and transverse to the longitudinal direction

defined by skiing.

Energizing means also connect the body 5 and the jaw 3. These means are represented in FIG. 1 in the form of an energy spring, in particular a compression spring 7 housed in the body, the initial compression of which is

is adjustable by a cap 8 screwed on the rear part of the body 10 5.

This is not limiting and the spring 7 can be replaced by any suitable elastic means of energy reserve, for example a cylinder filled with pressurized gas or fluid.

The energizing means also comprise a pressure member shown in Figure 1 in the form of a piston 9 slidably mounted relative to the body 5 in the longitudinal direction 4 of the body, which the spring 7 pushes back towards the jaw, and a ramp 10 of the jaw oriented

to the pressure member 9, which will be described in more detail later.

Figure i shows the binding 1 in the closed or paved position, and from this position under the effect of a vertical bias upward from the sole of the jaw the energizing means define for the binding 1 25 a running zone elastic o the jaw 3 is elastically returned in the direction of the ski then an opening zone o they allow tilting upward of the jaw 3. The border between the elastic travel zone and the opening zone corresponds to the trigger threshold , which can be adjusted by the initial compression of the spring 7 by means

of the stopper 8. This is known to those skilled in the art.

According to the invention, the body 5 of the binding is carried

by two lateral arms 11 and 12 which are integrally assembled to said body, and which connect it to the ski 2.

The side arms 11 and 12 are arranged substantially symmetrically to the longitudinal and vertical plane of symmetry of the ski 2, and they are articulated with respect to the ski 2 in their

lower part around a transverse axis 13.

In the embodiment shown, the transverse axis 13 is mounted on a base 14 secured to the ski 2 directly or by means of length adjustment means, and it is movable longitudinally in a transverse slot 15.

of the base 14 extending longitudinally.

Thus, as shown in Figure 3, the body 5 and the side arms II and 12 are movable in rotation about the axis 13, and as shown in Figure 5 they are also movable longitudinally by sliding the l 'axis 13 in the

light 15.

Preferably, the two arms 11 and 12 are bent and present from the axis 13 a first portion

16, 17 oriented substantially parallel to the upper surface of the ski 2, followed by a second portion which rises towards the body 5, only the second portion 18 of the arm 11 is visible in the figures.

Figures 1 to 6, 8 and 9 show the first portions 16 and 17 of the arms 11 and 12 parallel to each other and

oriented towards the rear of the ski, starting from axis 13.

In addition, advantageously in this case, the base 14 provides an upper surface 19 on which the shoe sole rests in the ground position, and the base 14 can also serve as a base plate for a braking device.

not shown.

Preferably, the spacing between the two arms 11 and 12, 30 at their respective first portion, is less than the width of the base 14 and that of the shoe sole, and the base has two portions of grooves 20 and 21

extending from the lumen 15 and opening towards the rear, in which the first portions 16 and 17 of the arms 11 and 12 are housed over at least part of their length.

-6 The groove portions 20, 21 provide lateral guidance to the arms 11 and 12 and allow retraction of their

first portion under the sole of the shoe.

The arms 11 and 12 have any suitable shape of cross section, for example an elongated, rectangular, ovoid, L-shaped section with a reinforcing rib, the large dimension of which is oriented in a vertical plane. The binding 1 also comprises a lever 22 which is articulated in its lower part relative to the ski 2 about a transverse and horizontal axis 23. In particular, the axis 23 is carried by a bearing 24 integral with the ski, which extends towards

the back of the base 14.

In its upper part, the lever 22 is interposed between the pressure member, the piston 9 in FIG. 1, and

the ramp 10 of the jaw 3.

Thus, the head of the lever 22 transmits on the ramp 10 of

the jaw 3 the thrust generated by the piston 9 and the spring 7.

The axis 23 of the lever 22 and the bearing 24 are preferably located approximately in line with the head of the lever 22.

In addition, referring to Figure 1, the axis 23 of articulation of the lever 22 is located behind

the axis 13 of articulation of the arms 11 and 12.

The head of the lever 22 has, on the side of the piston 9, a ramp 25 on which the pressure nose 26 of the piston 9 rests. In addition, on the side of the jaw 3, the head of the lever 22

has a pressure nose 27 which rests on the ramp 30 10 of the jaw.

The ramp 10 has an elastic stroke ramp 28 in contact with which the pressure nose 27 recalls the jaw 3 in the direction of the ski and an opening ramp 29 in contact with which the pressure nose 27 tends to open the jaw 35 towards the top. These two ramps 28 and 29 are separated by a peak 30 which corresponds to the triggering threshold of the binding. In a known manner, the elastic stroke ramp 28 is compressive and the opening ramp 29 is substantially decompressive. The ramp 25 of the lever 22 is compressive, that is to say that when the pressure nose 26 of the piston 9 travels upwards, the piston 9 is pushed backwards and the spring

is compressed. Conversely, the piston 9 returns to the front 10 when the pressure nose 26 describes the ramp 25 downwards.

Advantageously, a projecting rim 34 is located at the upper end of the ramp 25 of the lever 22, and limits the upward movement of the pressure nose 26 and therefore

the tilting movement of the body around the axis 13.

Preferably, the contact zone between the pressure nose 26 of the piston 9 and the ramp 25 is higher than the contact zone between the pressure nose 27 of the lever 22 and the ramp 10 of the jaw. This will be described in more detail later. The binding 1 also comprises a manual release means. Any known means of appropriate manual release is suitable, for example of the type described in patent FR 2,338,060, and for reasons of clarity, only a lever 33

has been shown schematically in the various figures. Preferably, the release lever is of the type which is actuated by a thrust exerted by the user, a component of which is oriented in the direction of the ski.

Figures 3, 4 and 5 illustrate the operation of the binding under the effect of stresses respectively verti30 wedge upwards exerted on the body 5, vertical upwards exerted on the jaw 3, horizontal towards the rear on

body 5.

-8 These different stress components have been intentionally isolated to better show the operation of the binding, but obviously, these components combine during skiing and therefore in the same way the relative movements of the body 5, the jaw 3 and the base 14, in response to these stress components, combine with one another. Figure 3 shows the binding 1, the body 5 of which is

requested by a vertical force directed upwards and shown diagrammatically by the arrow Fl.

Under the effect of such a stress, the body 5 and the arms 11 and 12 pivot upwards around the transverse axis 13. The jaw 3, for its part, follows the pivoting but

has no relative movement with respect to the body 5.

The lever 22 acts on the energizing means as follows. On the one hand, its pressure nose 27 runs through the

part 28 of the ramp 10 of the jaw, and on the other hand, its ramp 25 is traversed by the pressure nose 26 of the piston 9.

As has been described previously, the ramps 28 and 20 26 are compressive for the piston 9 and the spring 7, and the compressions of the spring 7 which they respectively generate are added together. The flange 34 which the ramp 25 of the lever 22 has in its upper part, retains the pressure nose 26 and through this the body 5, preferably before the nose 27

of the rocker 22 does not cross the trigger threshold 30.

In this way, a release of the binding, from its paved position, cannot be achieved only

by pushing the body upwards.

When the stress according to F1 ceases, the body 5 and the arms 11 and 12 are resiliently biased downwards by

the spring 7 which decompresses and by their own weight.

The pressure noses 27 and 26 run through the ramps 28 and in the opposite direction and the binding returns itself substantially to the position of FIG. 1. Thus in the present case, the compression of the spring is produced at the same time. times by the ramp 10 of the jaw 3, more precisely its part 28 and

by ramp 25 of lever 22.

Figure 4 shows the binding 1 whose jaw is biased by an upward vertical force F2, which is,

for example, exerted on the sole clamp 31.

In this figure, it is assumed that body 5 remains in

low position.

Under the effect of the stress F2, the jaw 3 pivots 10 relative to the body 5 around the transverse axis 6 carried by

the body.

During this pivoting, the pressure nose 27 of the lever 22 traverses the elastic travel ramp 28 of the jaw 3, then if the stress F2 has sufficient intensity, the pressure nose 27 crosses the trigger threshold 30 and travels through the opening ramp 29.

The ramp 28 being compressive, it pushes the head of the lever 22 towards the spring, which in turn pushes the piston back

9, which piston compresses the spring 7.

It should be noted that the pressure nose 26 of the piston 9

remains substantially stationary on the ramp 25 of the lever 22. A reduced movement is however due to the tilting of the lever 22 when its nose 27 traverses the ramp 28, but this movement is negligible compared to that described in relation to FIG. 3.

Thus, in this case, we can consider that the compression

of the spring is produced only by the ramp 10 of the jaw 3.

When the stress F2 ceases, if the pressure nose 27 is in contact with the elastic stroke ramp, the jaw 3 is resiliently returned towards the ski and the spring 7 is decompressed. If, moreover, the pressure nose 27 is in contact with the opening ramp 29, then the jaw 3 tends to

open up.

- 10 Figure 5 illustrates the binding 1 under the effect of a bias F3 directed horizontally towards the rear and

exerted on the body 5.

Under the action of this stress F3, the body 5, the arms 11, 12 and the jaw 3 move back and the axis 13 of articulation of the arms 11 and 12 passes through the slot 15 of the base 14.

This backward movement of the body 5 causes the lever 22 to tilt rearwardly around the transverse axis 23.

The ramp 28 of the jaw 3 and the pressure nose 27 of the lever on the one hand, the ramp 25 of the lever 22 and the pressure nose 26 of the piston 9 on the other hand, are arranged in such a way that, during the tilting the lever 22 backwards, the distance between the pressure noses 26 and 27 increases appreciably. In addition, advantageously, the pressure nose 26 is above the pressure nose 27, more precisely their zone of

contact with the respective ramps 25 and 28.

Thus, the rearward tilting of the lever 22 causes substantial compression of the spring 7 which, due to the relative vertical position of the pressure noses 26 and 27, tends to bring the body 5 forward as soon as the bias F3 cease. An elastic recoil effect is thus obtained on the one hand which is generated by the spring 7 of the energizing means and on the other hand, the intensity of which is directly dependent on the initial compression of the spring 7 and in particular on the adjustment of

its cap 8.

FIG. 6 represents the binding 1 in the disengaged position. This position is reached after manual release using lever 33 or after release of the binding.

and ejection of the boot when skiing.

In this position, the pressure nose 27 of the lever 22 is in contact with the opening ramp 29. On the other hand, the body 5 is in the low position and the pressure nose

26 of the piston is at the bottom of the ramp 25.

- 11 If from this position the body 5 is urged upwards, the pressure nose 26, while traversing the ramp 25, causes compression of the spring 7, which gives rise to a

elastic return to the lower body 5.

From this figure, it can be understood that the energy to be supplied for manual triggering is less than that necessary for triggering in practice of the ski. A release of the binding during the practice of the ski combines a vertical stressing of the jaw according to

F2 and a vertical stress on the body along Fl.

Thus, when triggering, it is the two ramps 28 of the jaw and 25 of the lever which come into play causing

thus the cumulative compression of the spring.

The intensity of the triggering threshold when skiing

is directly dependent on the spring compression caused by the two ramps.

On the other hand, in manual triggering, the intervention of

the user on the lever 33 tends to press the body 5 and 20, the arms 11 and 12 against the ski.

Therefore, only the ramp 28 of the jaw 3 enters

clearance, which means that the intensity of the triggering threshold is lower than the previous case, because the compression generated by the ramp 25 is substantially zero. Therefore the energy to be supplied for manual release is less than the energy required for the release in practice of the ski.

Likewise, the movement of the shoe, when putting on

tends to press body 5 and arms 11 and 12 against the ski.

Therefore, only the ramp 29 of the jaw comes into play 30 and the ramp 25 does not act on the compression of the spring.

The energy to be supplied for the boot is therefore lower than in the prior art.

In other words, the intensity of the triggering threshold for manual taking off is substantially equal to the intensity of the threshold to be crossed for putting on the footwear. Indeed, - 12

the pressure nose 27 must cross the same threshold 30, with, moreover, the pressure nose 26 at the bottom of its ramp 25.

On the other hand, when skiing, the intensity of the trigger threshold increases because, under the effect of the stresses, the pressure nose 26 travels along the ramp 25, the spring 7 is therefore further compressed when the threshold is crossed. trigger 30 only if the ramp 28 of the jaw caused

only the compression of the spring.

The relative inclinations of the release ramp 10 28 and of the ramp 25 make it possible to distribute the stress exerted by the boot on the jaw at the level of the two

ramps 28 and 25.

Added to this is the ratio between the distance of the ramp

28 to axis 6 and the distance from ramp 25 to axis 13.

In particular, we can choose these different parameters of

such that during a vertical stress, the pressure nose 26 comes into contact with the rim 34 when the pressure nose 27 reaches the height of the trigger threshold 30.

This is within the reach of those skilled in the art.

Likewise, the various parameters which make it possible to measure the intensity of the elastic recoil with respect to the compression of the spring 7 are within the reach of those skilled in the art.

It may also be noted that the binding is connected to the ski by a base 14 located in front of the jaw 3 and of the body 5, due to the orientation of the arms 11 and 12. This construction advantageously makes it possible to bring one of the arms closer together. the other, the assembly areas of the front and rear bindings of the ski and thus reduce the length of the ski on which the

ski flexion is disturbed by the bindings.

FIG. 7 represents an alternative embodiment of the binding 1 in which the first portions 16 and 17 of the

arms 11 and 12 are oriented forwards starting from the axis 13 and the axis 13 of articulation of the arms 11 and 12 as well as its support bearing 36 are located behind the axis 23 35 of lever articulation 22.

- 13 The slot 15 in which the axis 13 slides to ensure the elastic threshold is located in a rear bearing 36. Furthermore, the jaw 3, the body 5 and the rocker 22 are unchanged from the previous case. In the variant of FIG. 8, the piston 9 is replaced by a rocker 37 articulated around a transverse axis 38 relative to the body 5. In this variant, the transverse axis 38 is located in the lower part of the rocker 37. 10 This rocker 37 has in its upper part a nose

pressure 26 similar to that of the piston 9 oriented towards the head of the rocker 22 and the jaw. On the other side, the rocker has any suitable means and in particular a housing on which the end of the spring 7 rests, or a lug 15 on which it rests.

FIG. 9 represents, in a variant of FIG. 1, a binding in which the ramp 25 and the pressure nose 26 are interchanged. Thus, the rocker 22 has at its head and on the side of the spring 7 a pressure nose 39 which is in contact with a ramp 40 located on the piston 9. In the lower part of the ramp 40, there is a flange 41 which, like flange 34, is intended to limit the pivoting of the

body 5 on axis 13.

Figure 10 illustrates a combination of the previous two variants. The ramp 40 is not carried by a piston 9,

but by the rocker 37 articulated on the axis 38.

FIG. 11 represents an alternative embodiment according to which the base 14 moves with the articulation axis 13, the arms 11 and 12 and the body 5 during a recoil bias. In this case, the slot 15 is replaced by a cylindrical bore 45 of revolution for the axis 13 and the base 14 is slidably mounted in a longitudinal direction, on a slide 46 integral with the ski, directly or by means of length adjustment. The bearing 24 35 which carries the axis 23 of the lever 22 is integrally connected to the - 14

ski, which ensures the elastic return of the binding after a retreat.

The binding described in the various figures may also comprise known devices such as a manual release means, shown diagrammatically by the lever 33, a braking means actuated by the shoe sole or a

body of the fixation.

Also, the binding preferably comprises a known means of longitudinal adjustment, for example a slide in which slides the base 14 longitudinally with notches.

lock or other suitable means.

Of course, this description is only given

indicative and we could implement other

variants of the invention without thereby departing from the scope thereof.

In particular, the means of return of the binding for the elastic recoil could comprise, in addition to the offset of the pressure noses at the level of the rocker 22, independent and traditional means, such as a return spring acting for example on the axis 13 of articulation of the arms 11 and 12 or other suitable means. In this case, the actions

of these independent means and of the spring 7 are cumulative.

Of course, such independent return means for the elastic recoil could also be used alone, and in this case the spring 7 only exerts an action on the return.

elastic jaw 3 and body 5 towards the ski.

By way of illustration, FIG. 12 represents a variant of the embodiment of FIG. 11, according to which the bearing 23 is integral with the base 14 in its longitudinal sliding movement. In this case, the elastic return after a recoil is provided by traditional means not shown. Finally, the binding of the invention could be used

in the same way for retaining the front of a shoe.

- 15

Claims (13)

1. Safety binding of a boot on a ski (2) intended to retain one end of the boot, comprising - a jaw (3) capable of retaining said end of the boot against the ski (2), said jaw (3) ) being articu5 lée around a transverse axis (6) relative to a body (5) connected to the ski (2), - energizing means for elastic return of the jaw (3) comprising elastic means for energy reserve , a pressure member cooperating with a ramp of the jaw (3) on which it exerts a thrust, characterized in that - the body (5) is carried by two lateral arms (11, 12) which are themselves articulated relative to the ski (2) around a transverse axis (13) at their lower end, - a lever (22) is articulated at its lower end relative to the ski (2) around a transverse axis (23) and is interposed in its upper part between the ramp (10) of the jaw (3) and the pressure member (9, 37) energizing means of such fa So that the thrust exerted by the pressure member on the ramp of the jaw is transmitted to said ramp by means of the lever and varies according to the position of the arms and body in relation to the ski. 2. Binding according to claim 1, characterized in that the transverse axis of articulation (13) of the arms (11, 25 12) relative to the ski (2) is located in front of the axis. transverse articulation (23) of the lever (22) to the ski (2). 3. Binding according to claim 1, characterized in that the transverse articulation axis (13) of the arms (11, 12) relative to the ski (2) is located behind the axis 30 of transverse articulation (23) of the lever (22) to the ski (2). - 16 4. Binding according to claim 1, characterized in that the connection between the lever (22) and the pressure member (9, 37) of the energizing means comprises a pressure nose (26, 39) resting on a ramp (25, 40) and that said 5 ramp (25, 40) is compressive for the energizing means when lifting the arms (11, 12) and the body (5). 5. Binding according to claim 1, characterized in that the pressure nose (26) is carried by the member of pressure (9, 37) and the ramp (25, 40) is located on lever 10 (22). 6. Binding according to claim 1, characterized by the that the pressure nose (39) is carried by the lever (22) and the ramp (40) is located on the pressure member (9, 37). 7. Binding according to claim 4, characterized in that said ramp (25,40) has a flange (34,41) to limit the stroke of the pressure nose (26,39) and thereby the lifting movement of the arms (11,12) and body (5). 8. Binding according to claim 4, characterized in that the contact zone between the lever (22) and the pressure member 20 (9.37) is higher than the contact zone between the pressure nose ( 27) of the lever (22) and the ramp (10) of the jaw. 9. Binding according to claim 1, characterized in that the transverse articulation axis (13) of the arms (11, 25 12) is carried at the level of a transverse orifice (15, 45), by a base (14) connected to the ski. 10. Binding according to claim 9, characterized in that the spacing of the arms is less than the width of the base (14), that said base has two portions of rai30 nures (20, 21) opening towards the rear in which the first portions are at least partially lodged (17, 18) arms (11, 12) in the lower position of the body (5). 11. Binding according to claim 9, characterized in that the base (14) is integrally connected to the ski and that said transverse orifice for the articulation axis (13) - 17 is a transverse slot (15) s' extending longitudinally, along which the axis (13) of the arms (11, 12) slides. 12. Binding according to claim 9, characterized in that the base (14) is slidably mounted in a longitudinal direction along a slide (46) integrally connected to the ski (2), that said orifice is a bore (45 ) cylindrical of revolution, and that the bearing (24) for the axis articulation (23) of the lever (22) is integrally connected to the ski (2). 13. Binding according to claim 9, characterized in that the base (14) is slidably mounted in a longitudinal direction along a slide (46) integrally connected to the ski (2), that said orifice is a bore (45 ) 15 cylindrical of revolution, and that the bearing (24) for the articulation axis (23) of the lever (22) is integral with the base (14) in its sliding movement.