FR2536666A1 - Ski safety binding. - Google Patents

Abstract

The present invention relates to a ski safety binding comprising a support piece 1 fixed on the ski 2, a holding member 3 intended to hold one of the ends of a ski boot 6 and comprising two flanges 4, 5 for lateral retention of the boot, an elastic system 7, an intermediate piece 8 for taking up play and an energisation piece 9 which ensures the link with the holding member 3. This binding is characterised in that the two lateral retention flanges 4, 5 of the holding member 3 are each mounted so as to pivot and interact with the energisation piece 9 so as to be permanently stressed by this energisation piece 9 in the direction of the longitudinal plane of symmetry xy of the binding, through the action of the elastic system 7.

Description

 The present invention relates to a ski safety binding intended to hold, on the ski, one of the ends of a ski boot.

 () n already knows ski safety bindings which comprise a member for holding the end of the boot, which is constituted by a fastening jaw comprising two lateral retaining wings of the boot.

A security binding of this kind which is described in French patent NO 78 37119 of the applicant, comprises a support piece fixed on the ski and a caté of which is disposed the holding member comprising the two wings of lateral retention of the shoe, this body I being held in the direction of the support piece by an elastic system which is arranged on the other side of the support piece and which rests on the latter. moreover, an intermediate play take-up piece disposed between the holding member and the support piece, the holding member and the intermediate piece thus being integral in displacement in order to pivot relative to the support piece, against the action of the elastic system, and to thereby allow the release of the shoe. Furthermore, the elastic system is supported on an energizing part which extends to the shoe retaining member which is linked to this energizing part.

 In such a known safety binding, the fixing jaw constituting the holding member is in one piece, that is to say that it consists of a single piece comprising the two lateral wings for retaining the boot and a central and frontal part connecting these two wings. Due to such a one-piece structure, the fastening jaw ensures contact with the shoe at three points, that is to say two lateral support points and a front support point, only for a ski boot having well-defined dimensions and shape. To allow the safety binding to adapt perfectly to boots of different shapes and dimensions, it is necessary to be able to vary the relative position of the three points of 'support so that, whatever the shoe, the latter is in good contact at three points with the holding member and that it can thus be retained under optimal conditions.

 A device for adjusting the front support point has already been proposed in French patent application 80.26011 which solves the problem posed but requires relatively expensive mechanics and a manual operation which is not always well done.

 The object of the present invention is to remedy the aforementioned drawbacks and to ensure this three-point contact by particularly simple automatic means and this thanks to a particular adaptation of the holding member and of its connection with the other parts constituting the fixing. of security.

 To this end, this ski safety binding comprising a support piece fixed on the ski, a holding member intended to hold one of the ends of a ski boot and comprising two wings for lateral retention of the boot, this retaining member being located on one side of the support piece and biased towards the latter by an elastic system disposed on the other side of the support piece and bearing on the latter, an intermediate play take-up piece disposed between the holding member and the support piece and defining, with the support piece, two lateral support lines around each of which can tilt the holding member, the holding member and the intermediate piece being integral in movement to pivot relative to the support piece against the action of the elastic system, to allow the release of the shoe, and a energizing piece on which the elastic system acts and which provides the connection with the organ of my internal, is characterized in that the two lateral retaining wings of the retaining member are each pivotally mounted parallel to the plane of the ski and cooperating with the energizing part so as to be stressed peraanence by this piece of energization, towards the longitudinal plane of symmetry of the binding, under the action of the elastic system.

 your safety binding according to the invention thus offers the advantage that the holding member automatically adapts, as a result of more or less accentuated pivoting of the lateral retaining wings towards the outside, to the various shapes and dimensions of the ski boots intended to be maintained by the binding.

Various embodiments of the present invention will be described below, by way of non-limiting examples, with reference to the appended drawing in which
Figure 1 is a schematic horizontal sectional view of a safety binding according to the invention, in the rest position, with a ski boot of small width held by the binding.

 Figure 2 is a similar horizontal sectional view in the tilted position.

 Figure 3 is a schematic horizontal sectional view similar to Figure 1, in the case of maintaining a shoe of greater width.

 FIG. 4 is a view in horizontal section, taken along the line IV-IV of FIG. 5, detailed of the safety attachment illustrated schematically in FIGS. 1 to 3.

 FIG. 5 is a vertical and long sectional view in the longitudinal plane of symmetry of the binding.

 Figure 6 is a plan view of the housing constituting the energizing part.

 Figure 7 is a vertical sectional view taken along the line VII-VII of Figure 6.

 Figure 8 is a cross-sectional view taken along line VIII-VIII of Figure 6.

 Figure 9 is a bottom view of the housing constituting the energizing part.

 Figure 10 is a view of the rear of the housing.

 Figure 11 is a front view of the housing.

 Figure 12 is a vertical and longitudinal sectional view of the intermediate play take-up piece, in the longitudinal plane of symmetry.

 Figure 13 is a horizontal sectional view taken along line XIII-XIII of Figure 12.

 Figure 4 is a cross-sectional view taken along line XIV-XIV of Figure 13.

 Figure 15 is a bottom view of the intermediate play take-up piece.

 Figure 16 is a front view of the intermediate play take-up piece.

 Figure 17 is a rear view of the intermediate play take-up piece.

 Figure 18 is an elevational view of a side retaining wing.

 Figure 19 is a plan view of a side retaining wing.

 Figure 20 is a side view of a lateral retaining wing, taken from the front.

 Figure 21 is an elevational view of the support piece.

 Figure 22 is a partial plan view of the support piece.

 Figure 23 is a front view of the support piece.

 Figures 24, 25 and 26 are schematic horizontal sectional views of an alternative embodiment of the safety binding, respectively in the rest position, in the holding position of a shoe of large width, and in the tilted position .

 Figure 27 is a detailed horizontal sectional view of the fastener illustrated schematically in Figures 24 to 26, in the rest position.

 Figure 28 is a horizontal sectional view similar to that of Figure 27, the attachment being shown in the tilted position.

 We will first describe a first embodiment of the ski safety binding according to the invention which is shown diagrammatically in Figures 1 to 3, in detail in Figures 4 and 5 and whose main components are illustrated in Figures 6 to 23.

This safety binding constitutes a front stop for holding the front part of a ski boot. It essentially comprises a support piece 1 fixed to a ski 2, substantially perpendicular to the latter, a holding member 3 disposed on the rear side of the support piece 1 and comprising two lateral retaining wings 4, 5 of a ski boot 6, an elastic system 7 disposed on the anterior side of the support piece 1, an intermediate play take-up piece 8 disposed between the holding member 3 and the support piece 1, and a piece d energization 9, in the form of a box, to which the member 3 for holding the boot is linked and on which the elastic system 7 is supported to push it forward and thus press the holding member 3 as well as the intermediate piece 8 for taking up play on the rear face of the support piece 1. A fastening of this kind is described in French patent NO 78 37119 of the applicant.

 According to the invention the two wings 4, 5 for lateral retention of the boot which constitute the holding member 3, are each pivotally mounted in a substantially horizontal plane, and they cooperate with the energizing part 9 so as to be permanently requested upon closing in the direction of the longitudinal plane of symmetry xy of the safety fastener. More particularly, in this first nonlimiting embodiment of the invention, the two wings 4, 5 for lateral retention of the boot are independent of one another, arranged symmetrically with respect to the longitudinal plane of symmetry xy and articulated on the intermediate piece 8 respectively around vertical axes 11, 12, that is to say perpendicular to the ski 2. These axes 11, 12 have a tubular shape and they extend, in the rest position of the binding, above holes 13 (Figures 22 and 23) formed in a horizontal base secured to the piece di3ppui 1 and through which pass screws ensuring the retention of the binding on the ski 2. These tubular axes 11, 12 , are located under holes 9F of the housing 9 constituting the energization part and it is thus possible, by passing a screwdriver through the holes vf and the tubular axes 11, 12, to screw or unscrew the engaged blocking screws in the holes 13 of the base la.

 The pivot axes 11, 12 of the lateral wings 4, 5 extend through holes 14 formed in horizontal tabs 15 of the intermediate play take-up piece 8. These tabs 15 are located in the part of the piece 8 located behind the support piece I and they extend outwards above the lateral parts of the base where the holes 13 are formed, two legs 15 being superimposed, projecting outwards , on each side of the part 8. The part 8 which is made of a molded material, furthermore comprises a central cavity 16 in which the support part 1 is engaged vertically.

In the internal rear face limiting this central cavity 16 are formed two support ribs 17, 18, projecting towards the front and which can be either parallel and vertical or converging towards a point located above the ski, in the plane of longitudinal symmetry xy. These ribs 17, 18 are pressed into corresponding grooves 19, 21 provided in the rear face of the support piece 1, so as to define two support lines preferably converging upwards, so that the fixing can tilt in its assembly around one or other of these support lines, as described in French patent application NO 78.37119.

 The intermediate play take-up piece 8 is extended forward, beyond the support piece 1, by a sleeve 22 - horizontal and longitudinal, the axis of this sleeve being located in the longitudinal plane of symmetry xy in the rest position of the binding. This sleeve 2 opens into the internal front face delimiting the central cavity 16 and in this sleeve is mounted with axial sliding a movable support member 23 such as a piston in the form of a socket. This piston is pressed against the front face of the support piece 1 under the action of a spring 24 housed in the piston 23 and bearing, at its front end, on a plug 25. This plug 25 is extended towards the rear by a cylindrical skirt on the external surface of which a thread 26 is provided. This thread cooperates with a corresponding thread 27 (FIGS. 6 and 7) which extends axially in the front anterior part 9a of the housing 9 constituting the part d energization. This front part extends forwardly beyond the support piece 1 and it forms a body with a rear part 9b-, the two front parts 9a and rear 9b being molded in one piece.

The housing 9 covers the whole of the intermediate play take-up piece 8 which is applied to the support piece 1, along the two converging support lines defined by the two grooves 19, 21, as has been seen previously, and also, at its upper part, on a screw 28 which is screwed into the support piece 1, perpendicular to the upper horizontal face thereof. This support screw has a groove 29 which extends through a slot 31 provided in the upper horizontal wall 32 of the intermediate play take-up part a, which extends horizontally above the support part. 1. This light 31 is advantageously constituted by an orifice 31a in an arc of a circle, of a diameter greater than that of the threaded rod of the screw 28, this orifice 31a being extended towards the rear by a longitudinal slot 31b more small width which corresponds substantially to the diameter of the groove 29 of the screw 28. -When the attachment is mounted, as shown in Figure 5, the groove 29 of the screw 28 is housed in this slot 31b and the bottom of this Slot is in abutment against the screw 28.

 The upper support screw 28 has a head 32 of larger diameter provided with a diametrical slot for per me-ttre to rotate it. This head 32 is housed in an oblong opening 33 provided in the upper wall of the housing 9. By more or less screwing the upper support screw 28, it is possible to vary, relative to the support place 1, the height of the tilting assembly constituted by the intermediate play take-up piece 8 and the energization piece 9, with a view to adapting the binding, to the thickness of the sole of the immobilized ski boot.

 The wings 4, 5 pivotally mounted about the axes 11, 12 constitute levers with two arms. They each have a substantially triangular shape and they respectively comprise rear arms 4a, 5a, for retaining the boot, which extend backwards and outwards, front arms 4b, 5b and transverse arms 4c, 5c, extending in the direction of the longitu dinal plane of symmetry xy. These transverse arms 4c, 5c are in abutment against the internal face of the rear part 9b of the housing 9 and preferably in hollows 9c thereof -. The lower and rear part 9c of the housing 9 which extends transversely under the hollows 9c, has, in its rear front face, a recess 9e constituting a front support for the front end of the ski boot 6.

As can be seen in FIG. 4, the vertical face of each of the pivoting wings 4, 5 which extends between the front arm 4b, 5b and the transverse arm 4c, 5c is inclined relative to the longitudinal plane of symmetry xy and it is slightly spaced from the external facing faces 34 of the intermediate play take-up piece 8,
faces which are inclined from front to back in the direction of the longitudinal plane of symmetry xy. In this way the two lateral retaining wings 4, 5 are authorized to pivot by a limited angle around their respective axes 11, 12, the faces 34 of the part 8 constituting stops limiting this pivoting.

 Figure 4 illustrates how the safety binding according to the invention adapts to shoes 6 having different dimensions. In the upper half of Figure 4 is shown a ski boot 6 whose front has a relatively small width while in the lower half of this figure is shown a boot 6 having a greater width at the front. In the resting position of the attachment, the two lateral retaining wings 4, 5 are permanently biased, around their respective pivot axes 11, 12, so that their rear arms 4a, 5a are pressed in the direction of the longitudinal plane of symmetry xy.This stress is exerted by the housing 9 constituting the energizing part and which is pushed forward by the spring 24 bearing on the plug 5 screwed into the thread 27 of the boot 9. As a result the rear part 9b of the housing 9 which is biased cited forwards exerts, by the ceeux 9c, a pressure on the transverse arms 4c, 5c of the wings 4, 5, thus tending to rotate them around their axes 11, 12 to stress the arms posterior 4a, 5a in the direction of the longitudinal plane of symmetry xy. When a shoe 6 of wider width is e-ngage in the binding, this shoe pushes the wings 4, 5 outwards, as it is glossy in FIG. 3 and in the lower part of FIG. 4. The two wings 4, 5 then pivot in a direction such that the rear arms 4a, 5a are pushed outwards and that the transverse arms 4c, 5c are pushed backwards, carrying with them the sliding housing 9, against the action of the spring 24.

 The angular movement of the lateral retaining wings 4, 5 is limited, as we have seen previously, by the adjacent external faces 34 of the intermediate play take-up piece 8. As can be seen more particularly in FIG. 15, each of these external faces 34 advantageously comprises two parts 34a, 34b, slightly inclined with respect to one another so as to form an obtuse angle of large opening, open in the direction of the front and of the longitudinal plane of symmetry xy . The part 34b of the external face 34 which is closest to the xy plane thus constitutes a stop for the neighboring lateral wing by limiting the closing of the wings, while the other part 34a constitutes a stop for the wing lateral retainer next to it, to limit the opening of the wings. It goes without saying that the stop 34a must be such that the two wings can open enough to allow the fitting of the widest shoes that can be found in trade. I1 also goes without saying that the stop 34b must be such that the closure of the wings is sufficient to allow the fitting of the narrowest shoes on the market.

 From the above description, it can be seen that the safety binding according to the invention adapts very easily to ski boots of different width. Furthermore, this binding plays its usual groan by ensuring the release of the boot 6 in the event of excessive stress acting on the skier's foot. FIG. 2 illustrates the release position of the binding in which the assembly formed by the intermediate play take-up piece 8, the energizing piece 9 and the lateral retaining wings 4, 5 has tilted around the piece of support 1, to release the shoe.

 We will now describe with reference to Figures 24.

at 28, an alternative embodiment of the safety fastener according to the invention. This binding comprises, as in the previous case, a support piece 1 fixed to the ski and on the rear face of which is applied, by means of a play take-up piece 35, the member 3 for holding the shoe 6. In this embodiment of the invention the member 3 for holding the shoe 6 consists of two lateral retaining wings 36, 37 which are articulated around a single axis 38 perpendicular to the ski and integral with the rear part of the energizing part 39, in the longitudinal plane of symmetry xy
This articulation axis 38 is housed in a rear cavity 35b of the intermediate part 35. The wings 36, 37 constitute levers with two arms, one of which, namely the rear arm 36a, 37a, is inclined backwards. and outwards, while the other arm 36b, 37b surrounds the axis of articulation 38.

 This energization part 39 is produced in the form of a housing extending essentially in front of the support part 1 and which is biased forward by the spring 24 pressing the piston 23 against the Face front of the support piece 1. The housing 39 has, in its rear part, a cavity 41 in which the support piece 1 is engaged and which is delimited by a peripheral wall 42 surrounding the intermediate play take-up piece 35 The rear end of the peripheral wall 42 is located at a certain distance from the front and transverse faces 36c, 37c delimiting the lateral retaining wings 36, 37 towards the front. These faces 36a, 37 are themselves pressed against the rear lips and transverse 35a opposite the intermediate play take-up part 35, lips extending outwards and forming pivots for the wings 36, 37.

 In the rest position the housing 39 is biased forward by the spring 24 and it is the same with the vertical axis 38 which is integral therewith. Because the two lateral retaining wings 36, 37 are pressed, by their front and transverse faces 36c, 37c against the intermediate play take-up part 35, which is in turn applied under pressure against the rear face of the part d 'Support 1, it follows that the two rear arms 36a, 37a of the lateral retaining wings 36, 37 forming levers are biased towards the longitudinal plane of symmetry xy. They are however immobilized in the rest position (fig. 27) because their internal and longitudinal faces 36d, 37d are n abutted one on the other.

 When engaging the front of a ski boot 6 in the holding member 3 consisting of pivoting wings 36, 37-, this boot pushes more or less outward, along its width, the wings 36 and 37 This is made possible by the fact that the wings 36, 37 form levers bearing on the lips 35a of the play take-up piece, which in fact constitute pivoting pivots of the wings 36, 37. The common vertical axis 38 is thus pulled slightly backwards, which causes the housing 39 to slide towards the rear and a slight additional compression of the spring 24.

 L again when the fastening is released, the assembly which is formed by the wings 36, 37, the intermediate play take-up piece 35 and the energization box 39, switches laterally, on the support piece 1, as it is illustrated in Figures 26 and 28, to ensure the release of the shoe.

 According to the first embodiment, the two axes 11 and 12 are arranged vertically and parallel to each other, but it could be otherwise.

Indeed, these could be converging upwards or even downwards.

Claims (16)

 1.- Ski safety binding comprising a support piece (1) fixed on the ski (2), a holding member (3) intended to hold one of the ends of a ski boot (6) and comprising two wings (4, 5) for lateral retention of the boot, this holding member (3) being located on one side of the support piece (1) and biased towards the latter by an elastic system (7) arranged on the other side of the support piece (1) and bearing on the latter, an intermediate play take-up piece (8) disposed between the holding member (3) and the support piece (1) and defining, with the support piece, two lateral support lines around each of which can tilt the holding member, the holding member (3) and the intermediate piece (8) being integral in displacement in order to pivot by relative to the support piece (1) against the action of the elastic system (7), to allow the release of the boot, and an energization piece (9) on which the system acts me elastic (7) and which provides the connection with the holding member (3), is characterized in that the two lateral retaining wings (4, 5; 36, 37) of the retaining member (3) are each pivotally mounted and cooperating with the energizing part (9, 39) so as to be permanently stressed by this energizing part (9, 39) , in the direction of the longitudinal plane of symmetry (xy) of the binding, under the action of the elastic system (7).  2.- ski binding according to claim 1 characterized in that each wing (4, 5; 36, 37) constitutes a lever with two arms including a first arm (4a, 5a; 36a, 37a), extending backwards and outwards, comes into contact with the lateral edge of the sole of the shoe (6) and the second arm (4c, 5c; 36b, 37b) is biased forward by the part energization (9, 39), under the action of the elastic system (7).  3.- ski binding according to any one of claims 1 and 2, characterized in that the energizing part (9, 39) is constituted by a casing enveloping the intermediate play take-up part (8 , 35) and the support piece (1), extending in front and behind the support piece (1), urged forward by the elastic system (7) and mounted with longitudinal sliding relative to to the backlash intermediate piece (cJ, 35)  4. A ski binding according to any one of claims 1 to 3, characterized in that it comprises a front support for the front end of the sole of the boot (6).  5. A ski binding according to claim 4, characterized in that the front support (9e) is formed in a lower part (9d), extending transversely, of the housing (9) constituting the energizing part. .  6. A ski binding according to claim 4, characterized in that the front support is formed of stops provided in the lower and central part of each of the articulated wings (36, 37).  7. A ski binding according to any one of the preceding claims, characterized in that the wings (4, 5) are articulated on the intermediate play take-up piece (8).  8.- ski binding according to claim 7, characterized in that the wings (4, 5) are articulated around two axes (11, 12) carried by the intermediate play take-up piece (8) and arranged symmetrically with respect to the longitudinal plane of symmetry (xy).  9. A ski binding according to any one of claims 7 and 8 characterized in that the second arm (4c, 5c) of each of the wings (4, 5) is supported in a hollow part (9c) formed in the rear part (9b) of the housing (9) constituting the energization part.  10.- ski binding according to any one of claims 8 and 9 characterized in that each axis (11, 12) of articulation of the wings (4, 5) is engaged in holes (14) provided d- years of the lugs (15) of the intermediate play take-up piece (8), these lugs (15) being arranged in pairs of superimposed lugs, on each side of the intermediate play take-up piece (8).  11. A ski binding according to claim 10 characterized in that the articulation axes (11, 12) of the wings (4, 5) are tubular and open, at their upper ends, under holes (9f) formed in the housing (9) constituting the energizing part, the pins (11, 12) being located, in the rest position, above the locking screw of the bearing part (1) on the ski ( 2).  12. A ski binding according to any one of claims 7 to 11 characterized in that the intermediate play take-up piece (8) is extended gated forward by a longitudinal sleeve (22) in which is engaged sliding a piston (23) forming part of the elastic system (7) and which is pressed against the front face of the support piece (1), and it is pierced, in its substantially horizontal upper part, with a light ( 31) in which is engaged a groove (29) of an upper support screw screwed into the support piece (1) and whose head (32), of larger diameter, is housed in an oblong opening (33 ) of the housing (9) constituting the energizing part.  13.- ski binding according to any one of claims 7 to 12 characterized in that the intermediate play take-up piece (8) has lateral faces (34) inclined relative to the longitudinal axis and which constitute stops limiting the angular deflection of the wings (4, 5).  14. A ski binding according to claim 13 characterized in that each of the wings (4, 5) comprises a third arm (4b) extending forward and abutting against one of the side faces (34) of la- intermediate play take-up piece (8) during the pivoting of the corresponding wing outwards, after a certain angular movement.  15.- ski binding according to any one of claims 1 9 7 characterized in that the two wings (36, 37) are articulated on the housing (39) constituting the energizing part.  16. Safety binding for ski according to claim 15 characterized in that the two wings (36, 37) are articulated around a single central axis (38) disposed in the longitudinal plane of symmetry (xy) and they are supported by transverse front faces (36c, 37c) on corresponding transverse faces (35a) of the intermediate play take-up piece (35), the axis (38) of articulation of the wings (36, 37) being housed in a rear cavity (35b) of the intermediate play take-up piece (35).