FR2643567A1 - SECURITY SKI BINDING - Google Patents

Abstract

Binding intended for the fastening of the front of the boot or of the heel, comprising a body (13), pivoting (14) or fixed, equipped with a jaw (15) articulated on the body about a horizontal spindle (16). The body and the jaw are held in a closed position by at least one spring (18) acting by means of a piston (17) on a transmission device comprising two moving parts (21, 24) articulated on each other. One of these moving parts (21) permanently bears on the jaw and the other moving part (24) permanently bears against lateral retention means consisting, for example, of two fixed stops (10) on which bear levers (33a) acting on a transmission member (26). In particular, a lateral displacement of the body or of the boot, respectively, results in a reduction in the vertical pressure of the jaw on the boot.

Description

The present invention relates to a safety ski binding intended for

  maintain the heel or the end of the foot, comprising a body, a jaw articulated on this body about a horizontal axis, means for lateral retention of the shoe, elastic means, at least partly common, for recalling lateral and jaw retaining means in the closed position of the fastening, these return means comprising at least one spring acting by means of at least one piston on a transmission mechanism, movable in rotation or in translation, interposed between, on the one hand, the piston and, on the other hand, the jaw and

the lateral retaining means.

  In known ski bindings, consisting of a front stop and a heel piece, the body is either

  fixed, or pivoting around a vertical axis. We know

  natt front stops whose body is fixed and the jaw not articulated and in which the shoe is held laterally by two levers articulated around two vertical axes. We also know

  front stops with pivoting body and non-articulated jaw

  abutment. In both cases, the jaw height is

  adjustable, but good adjustment is difficult to achieve.

  Either there is a play, or the shoe is stuck, a stuck could also be due to the presence of dirt or ice. However, in the event of an accompanied fall

  with a twist, the foot must be able to slide sideways-

  to drive one of the levers, respectively the

  body in rotation and trigger fixation. A wedge

  or very high friction forces modify the behavior of the binding, to the point of preventing its

  trigger. As for the front stops and the heels -

  ners whose jaw rises in the event of a fall forward, vertical pressure on the heel or toe

  of the foot generally remains constant tors of a displacement-

  rotation of the body of the binding, which often makes lateral release of the foot difficult, due to the high friction forces between the

  shoe and ski sole. These frictional forces

  This also varies from one sole to another and depending on the condition of the sole and the bearing surface of the sole on the ski. The setting of the binding for its torsional release becomes

  During very difficult, even illusory.

  We also know the document DE-A-28 12 149, a pivoting body attachment in which the pressure on the heel disappears completely when the body is rotated. This fixing comprises a fixed stop constituted by a vertical flat of the pivot against which is held in abutment a lever in the form of a rocker articulated at the end of the piston. The articulated jaw is supported on the upper part of this lever by a transverse bar moving

  in a body light. According to another form of exe

  cution described in this document, a lever is articulated

  by its lower end between the piston and the res-

  comes out, the flat end of the piston coming into constant support

  be the flat of La butée. In this case also the mà-

  articulated choir is supported on the upper end of the lever by a transverse bar. In both cases,

  as soon as the body of the binding is rotated

  tion following a twist on the leg, a clearance appears between the transverse bar of the jaw

  and the lever, so that the foot floats

  ter in the binding, such a flutter can provoke

  a feeling of insecurity, especially if it is the heel, and reactions likely to cause

  fall, while the simple twist would not have

dragged the fall.

2643567 3

  The object of the present invention is to ensure that

  dependence of vertical forces and reactions

  Lateral and sideways by fixing on the shoe-

  sure, and in particular a reduction in the vertical pressure of the jaw on the shoe during a

torsional stress.

  To this end, the binding according to the invention is characterized

  laughing at the fact that said transmission mechanism comprises two mobiles articulated one on the other about an axis parallel to the axis of the articulation of the jaw on the body, one of these mobiles being permanently in

  support on the jaw and the other mobile being perma-

  nence bearing directly or indirectly against the lateral retaining means, the piston, respectively the pistons, being in abutment against one of the moving parts in a place that is killed between its articulation on the other

  mobile and its part resting on the jaw, respectively

  vement sur-Lateral restraint.

  It emerges from the construction thus defined that the form-

  this with the piston rests against the mobile

  concerned is always balanced by two opposing forces

  acting at two points respectively

  above and below the piston support point. During a strong torsional stress, One of these forces increases and repels the piston by making it pivot

  the mobile bearing against the piston on the other mobile.

  Due to this pivoting, the distance between the point

  of support of the piston on the mobile and the point of application

  tion of the other force grows. The moment being practi-

  unchanged, the system still being balanced

  In short, this force decreases, which corresponds to a dimi-

  the reaction of the jaw, i.e.

  the pressure of the jaw on the shoe.

2643567 4

  In order to have a progressive decrease in the pressure of the jaw, the mobile bearing against the piston preferably has a convex surface

  generator cylindrical parallel to the articulation axis

  Lation of the mobiles, in contact with the piston, which

has a flat face.

  Conversely, the piston may have a cy-

  Generator line parallel to the articulation axis

  tion of the mobiles resting against a flat face of the

mobile concerned.

  Cylindrical surfaces are not necessarily

  circular cylindrical surfaces.

  Preferably, the mobiles are permanently in con-

  linear tact respectively with the piston, the ma-

  choire and the stopper, so that the wear of the par-

  ties in contact is negligible and does not affect the good

operation of the binding.

  The accompanying drawing shows, by way of example, seven

embodiments of the invention.

  Figure 1 is an axial vertical sectional view along I-I of Figure 2 of a front stop according to a first

form of execution.

  Figure 2 is a sectional view along IIa-IIa and

IIb-IIb of Figure 1.

  Figure 3 partially shows the same attachment

  being triggered in reverse fall.

  Figure 4 partially shows the same attachment

  being triggered in torsion.

2643567 5

  FIG. 5 partially represents the same fastening biased diagonally, that is to say when falling back

and in torsion.

  Figures 6 to 9 show an alternative embodiment

  of the first embodiment and correspond res-

  respectively in Figures 1, 2, 3 and 5.

  Figure 10 is a vertical axial sectional view

  of a front stop according to a third embodiment.

  Figure 11 is a sectional view along XI-XI of the

figure 10.

  Figure 12 partially shows the same fixation

  being triggered in reverse fall.

  Figure 13 partially shows the same attachment

  being triggered in torsion.

  Figure 14 is a vertical axial sectional view

  of a front stop according to a fourth embodiment.

  Figure 15 is a vertical axial sectional view

  of a front stop according to a fifth embodiment.

  Figure 16 is a vertical axial sectional view

  of a front stop according to a sixth embodiment.

  Figure 17 is a sectional view along XVII-XVII of the

figure 16.

  FIG. 18 partially represents the binding according to FIGS. 16 and 17 during triggering in fall

before.

2643567 6

  Figure 19 partially shows the same fixation

  being triggered in torsion.

  FIG. 20 partially represents a seventh embodiment, derived from the third embodiment

  cution, being triggered in torsion.

  Figure 21 shows schematically a front stop

with fixed body.

  Figure 21a shows the forces acting on the

Exhibit 24 in Figure 21.

  22 is a plan view of the lateral retaining means

  rale of the stop represented in figure 21.

  Figure 23 schematically shows another stop

front with fixed body.

  The front stop shown in Figures 1 and 2 comprises a body 13 pivotally mounted on a ski 2 by means of a pivot 14. On the body 13 is articulated a jaw 15

  about an axis 16. The position of the jaw 15 represents

  presented in Figure 1 is the position in which it presses the front of a shoe 1 against a

  plate 3 made of a material with a low coefficient of friction

  seriously. The body 13 has a horizontal bore 46 in which slides a piston 17 pushed forward by a spring 18 working in compression and whose compression can be adjusted by means of a threaded plug 19 screwed into the bore 46. The part front of the body 13 has a vertical slot 20 limited by two cheeks 13a and 13b of the body 13 (Figure 2) and in which is mounted a first lever 21 extending approximately vertically and articulated at its

2643567 7

  lower end around an axis 22 on the body 13. This first lever 21 is provided with a spout 21a ending in a rounded rectilinear edge resting linearly on a ramp 15a of the jaw 15 under the thrust of the spring 18. On the lever 21, near its upper end, is articulated around an axis 23 a second lever 24 extending downward and applied against the first lever 21 by the piston 17. The lever 24 bears against you piston 17 by a cylindrical curved surface of generatrices parallel to the axes 22 and 23. At its lower end, the second lever 24 has a vertical central slot 25 in which is engaged a horizontal axial transmission rod

  26 having at one of its ends a widening

  ment 28 extending between the split end of the second

  lever 24 and the first lever 21, and at its other ex-

  a head 39 on the back of which leans

  the ends of two levers 33 and 34 pivoted respectively

  tively, at an intermediate point, around two

  vertical axes 35 and 36 in the body 13. These two le-

  sinks 33 and 34 are identical and mounted identically

  tick symmetrically to the vertical plane of symmetry 12 of the binding. However, they appear different in FIG. 2 due to the different cutting levels IIa

  and IIb shown below and respectively

  above the axis 12 in Figure 2. The levers 33 and 34 bear against the head 39 by a split end such as 33a. The other end of the lever 33 is pressed against a fixed stop 10, while the other end of the lever 34 is pressed against a second fixed stop 11, the stops 10 and 11 being arranged symmetrically at

axis 12.

  In the position shown in Figures 1 and 2,

  in other words, the road position without danger

  the spring 18 keeps the jaw 15 in position

2643567 8

  folded down and it also pulls forward The rod

  26 via the second lever 24. By its port-

  tee 39, the rod 26 supports the levers 33 and 34 on their stops 10 and 11, which has the effect of keeping the binding aligned with the axis of the ski, due to the

  symmetry of construction. If the fastener is used

  see as heel piece IT will also include a lever

  known per se, not shown to open and close ma-

  nUllly the jaw for heaving and shoeing-

  sage respectively and The jaw will be fitted with a

  spur for closing with the heel. The axis 23 tra-

  pour cheeks 13a and 13b through two lights 28

  in an arc centered on axis 22.

  The functioning of the binding, both as a front stop and as a heel piece will be described in relation to

Figures 3 to 5.

  Let us first examine the case of a front stop. If the

  stop is stressed in torsion, The shoe has

  dance to drive The jaw 15, and consequently The body 13 in rotation around the pivot 14. Depending on the direction of rotation, One or the other of the Levers 33 and 34 pivots around its axis by resting on its stop 10, respectively 11, which has the effect of driving the second lever 24 which pivots on the first lever 21, the latter remaining stationary. The piston 17 is pushed back

  by compressing Spring 18, as shown in Figure

  gure 4. Beyond a certain angle of rotation of the body 13, the shoe laterally escapes fixation. Yes

  the torsional stress is insufficient to

  drag a trigger, Reducing the pressure of the lever 21 on the jaw 15 allows only a

  Slight pivoting of this jaw. The spout 21a comes off

  places very little on Ramp 15a of La jaw. Over there

  reduction of the vertical pressure we reduce the fro-

2643567 9

  tements. After triggering the binding is returned to its initial position by the spring and the action

levers and ramps.

  The case of a combined fall in torsion and rear fall is shown in Figure 5. This position results from the combination of displacements shown in the figures

3 and 4.

  The triggering of the backstop stop is re-

  presented in Figure 3. Under the effect of the fall backwards, the jaw 15 is lifted by the end of the foot by pushing the spout 21a of the lever 21 which compresses the spring 18 by pushing the piston 17. The shoe is released when the spout 21a reaches the end 22a of the ramp 15a of the jaw 15. This end 22a is not exceeded, so that the jaw 15 is returned to its initial position under the thrust of the spring and by the cam effect of the ramp 15a. We

  note that in this case the second lever 24 does not

  does not come and the rod 26 remains stationary; levers 21

  and 24 behave as a single lever.

  If the binding is used as a heel

  Behavior only differs in one point:

  falling before the end 22a of the ramp 15a is

  passed and the jaw remains open after triggering, the beak 21a of the lever 21 pressing against the surface

22b of the jaw.

  These considerations apply to all forms

of execution described.

  If we examine the fulcrum, more precisely the fulcrum, of the piston 17 against the second lever 24,

  we see that in Figure 1 this support point is ap-

2643567 10

  approximately halfway between the axis 23, point of action of the reaction force of the jaw and the lower end of the lever 24, point of action of the reaction force of the stops 10 and 11. In the figure 3, we see that this point of action has moved in

  direction of axis 23, at point A, while in fig.

  re 4 this action point has moved downwards, to a point B. There is therefore a variation of the lever arms of the reaction forces relative to the fulcrum of the piston. This variation is particularly favorable, as will be explained with the aid of Figures la, 3a and

  4a, which schematically represent three states of equi-

  free for three characteristic states of the binding.

  P1 is the force exerted by the jaw 15 on the axis 23 of the lever 24. P2 is the force exerted on the end of the lever 24 by the reaction of the stops 10 and 11. P3

  is the force exerted by the piston 17 on the lever 24.

  The system being in equilibrium P3 = P1 + P2. The arms of

  force levers P1 and P2 are designated by a and b.

  The system being in equilibrium, we have, relatively to the point of application of the force P3 P1. a = P2. b Dividing by P2. a we obtain P1 b P2 a The ratio of forces P1 and P2 is therefore equal to the inverse ratio of their lever arms. The length of these lever arms therefore plays a very important role in the

  determination of the triggering forces of the fixa-

  tion. It also appears from FIGS. 3a and 4a that these lever arms a and b vary thanks to the convex shape 2643567 l of the lever 24. By means of this convex shape and the progressive characteristic of the spring, it is

  possible to obtain a determined behavior in decline

  diagonally, that is to say in the case of a fall forward accompanied by a twist. Diagonal behavior is favorable if the torsional energy required for triggering is less than the torsional energy necessary for triggering in pure torsion. However, if we compare Figures 4 and 5, we

  notes that this is indeed the case, since Le bras de le-

  vier b is significantly shorter in the position according to figure 4 than in the position according to the figure, from which it follows that P2 is significantly higher

in the case of Figure 4.

  Conversely, the energy required to de-

  latching in front fall, respectively fall, decreases if the leg is simultaneously subjected to a torsion. However this is indeed the case since the lever arm has force P1 is larger in the position according to

  Figures 4 and 4a that in the position according to the figures

  gures 3 and 3a, which means that, conversely, P1 is

  smaller in diagonal trigger than in trigger-

  lying in pure fall before. In all cases the decline

  diagonal pitch does not result from the addition of the forces necessary for the triggering in forward fall and in torsion, respectively, but the forces

  on the contrary are reduced, which is

  form to the teaching concerning the resistance of the leg in the event of superposition of efforts of bending

and twist.

  The lever 24 could be articulated on the rod 26.

  This variant is shown in the figures

  6 to 9. The lever 24 'corresponding to the Lever 24 is ar-

2643567 12

  ticuLé on the rod 26 'by means of an axis 4. So that this joint 4 does not interfere with the movement

  levers 21 and 24 ', Le Levier 24' presents a Lu-

  miere 5 for the passage of the hinge pin 23 of the two levers. Figures 8 and 9 illustrate the displacement of axis 23 in Light 5 for two characteristic positions, ie being triggered in

  rear fall, respectively in combined fall in tor-

sion and falling back.

  It can also be seen that with a relative construction

  Very simple, it was possible to keep permanent linear connections between the spout 21a of the lever 21 and the ramp 15a of the jaw 15, between the piston 17 and the lever 24, and between the stops 10 and 11 and the levers 33 and 34. However, such a linear contact

  present on point contact devices used

  so far, the advantage of much less wear

  weak and much less sensitive to Sa-

  smoothness. Occasional contacts appearing so far

  in the fixings, whether by a ball, a ca-

  spherical monkfish or an edge on a cylindrical surface

  that have the effect of causing the formation of a hollow

  due to wear and tear, which completely changes the characteristics

  fixing characteristics and can make security illusory. The Linear contacts also allow the use of less hard metals, or even plastics. A third embodiment of the invention will now be described in relation to FIGS. 10 to

  13. In order to simplify the description and avoid

  unnecessary repetitions, the parts of the fixation iden-

  ticks in the first embodiment or having undergone only minor modifications are designated by the same references. In this embodiment, the levers 33 and 34 bear directly on the lower end

  of the second lever 24 by their ends 33a and 34a.

  In the bore 46 is mounted a piston 45 on which a first spring 47 acts, the precompression of which can be adjusted by means of a threaded plug 48. The piston

  has a rib 49 in its lower part

  engaged in a guide groove 50 to maintain the piston 45 in a determined angular position in its bore. The front face of the piston 45 bearing against the curved face of the lever 24 is not continuous, but extends only over the lower half of

  this frontal surface. The upper part is occu-

  pée by a second piston 52 on which acts a second helical spring 53 coaxial with the spring 47, but of smaller diameter so as to rest only on the piston 52.- The precompression of the spring 53 can be adjusted individually by means of 'a threaded plug 54 screwed into the threaded plug 48. The piston 52 is also integral with a sliding guide rod 55

  in a bore 56 provided in the threaded plug 54.

* When falling backwards (for a front stop) without significant torsion, the jaw 15 pushes the first lever 21 and with it the second lever 24 which simultaneously pushes the pistons 45 and 52 by compressing the two springs 47 and 53 ( figure 12). The effort required is significant and also grows rapidly with the

jaw lift 15.

  3Q On the other hand, in pure torsion (figure 13) one of the

  viers 33 or 34, for example the lever 33 drives ex-

  lower end of the second lever 24 by its arm

  33a. In its movement, the lever 24 pushes back mainly

  generally piston 45 and only slightly the piston

  tone 52, so it's the outside spring

  47 which is mainly compressed. It is therefore possible

2643567 14

  bLe to adjust the elastic resistance differently when triggered in reverse fall and in torsion. In addition, as in the first embodiment, and for the same reasons, the vertical pressure of the jaw on the shoe decreases when the binding is driven.

in torsion.

  A fourth embodiment is shown in Figure 14. As in the previous cases iL can be as well a front stop as a heel. Parts identical or similar to those of the first embodiment have been designated again by

  same references. We find in this form of exe

  cution practically the same body 13 and the same levers 21 and 24, as well as the piston 17 and a single spring 18. This fourth embodiment differs from the first embodiment by the biasing means of the body 13 in torsion: the body 13 carries a lever 71

  articulated on a transverse horizontal axis 72 and carrying

  as a roller 73 rotatably mounted on a perpen- ted axis

  dicular to the axis 72. The end 71a of the lever 71 bears against the lower end of the lever 24, while the roller 73 rests against a fixed stop 74 in the form of a cam having the shape of an undulation

  symmetrical, the hollow of which is located on the axis of the ski.

  Under the thrust of the spring 18, the roller 73 tends to remain, respectively to return to the bottom of this undulation. During a torsional stress, the roller 73 is pushed back by the cam 74, which makes the lever 71 pivot in an anti-clockwise direction,

  which causes lever 24 to tilt as in Figure 4.

  We therefore find the same conditions as in the

  first form of execution with the same effects.

  A fifth embodiment is shown in Figure 15. The attachment shown, which can again be a front stop or a heel, comprises a body 13 "pivotally mounted on a vertical pivot 61 on which it is retained by a pin 22 "engaged in

  a groove 63 of the pivot 61. The pin 22 "constitutes if-

  simultaneously the pivot axis of a jaw 64 on the body 60. This jaw 64 is provided, in a known manner, with a part 65 adjustable in height by means

  of a screw 66 and pressing on the shoe 1.

  The body 13 "has a horizontal bore 67 in the-

  which is mounted a piston 17 "-on which acts a spring 18" resting on the other hand on a threaded plug 19 "

  for adjusting the precompression of the 18 "spring.

  The piston 17 "rests against a lever 24" whose upper part is articulated on the jaw 64 at

  by means of an axis 72 parallel to the axis 22 "and the ex-

  23 "lower end is articulated, without auxiliary means

  binders, on a sliding piece 21 "in the form of

  querre, the vertical part of which leans against a mete

  vertical flat 70 "formed on an extension of the pivot 61. This flat 70 is close to the geometric axis of the pivot 61. The horizontal part of the sliding part 21" rests on a flat face 76 of the body 13 "11 and on a horizontal plane face of the pivot 61. The part of the jaw 64 pivoting on the body 13 "is constituted

  a piece of folded sheet metal having two wings extending

  on each side of the body 13 ". The axis 72 crosses

  so the 13 "body which has two light

  mieres 77 in an arc allowing the tilting of

  jaw. The 24 "lever also has a

  die 60 towards the 22 "axis.

  When the body 13 "is rotated around its pivot 61, one of the vertical edges of the flat 70

2643567 16

  push the piece 21 "by turning the lever 24" clockwise around sorn

  23 "end. As in the first form of execution

  tion, The point of contact of the piston 17 "against the lever 24" moves away from the axis 72, which has the effect of reducing the vertical pressure of the jaw 64 on

  the shoe, this pressure remaining sufficient

  health to keep the shoe applied against the ski, unless the torsion is accompanied by a fall, forward for a lap and respectively back for a front stop. In this case the axis 72 is entered in rotation anticlockwise around the axis 22 "and the lever 24" rotates in the same direction by pushing the piston 17 ", the axis 72 bringing the piston back 17 "again, in a position similar to or close to the position

shown in the drawings.

  A sixth embodiment of the binding according to the invention will now be described in relation to

  Figures 16, 17, 18 and 19. By measuring simpLifi-

  cation and to avoid repetition, The parts of this fixation similar to those of the first or third embodiment are designated by the

  same references, even if these parties have suffered some-

  that changes in form. The parts corresponding to levers 21 and 24 have been designated by 21 "" and 24 "". We thus find a body 13 pivotally mounted on

  ski 2 by means of a pivot 14 and having a bore

  sage 46 in which are mounted two coaxial springs

  47 and 53 whose precompression can be set separately

  rement by means of two threaded plugs 48 and 54 as in the third embodiment. In this case, the hinge pin 16 of the jaw 15 passes through the bore

  46. The first lever 21 is replaced here by a cou-

  shank 21 "" sliding in bore 46 and resting

2643567 17

  by the rounded rectilinear edge 57 of an anterior spout on the ramp 15a of the jaw 15 under the thrust of the internal spring 53. At the rear of the knife 21 "", in the upper part thereof, is articulated, around an axis 23, a lever 24 "" corresponding to the second lever 24 of the previous embodiments. This lever has at the front two transverse wings 60 slightly rounded against which abuts a piston 61 sliding in a bore 62 of the slide 21 "" and on which acts the external spring 47. This spring 47 therefore acts on the lever 24 "" whose curved wings 60 are the equivalent of the curved surface of the lever 24 of the previous embodiments. The lower end of the lever 24 "" carries a vertical axis 65 on which a gaLet 66 is rotatably supported, under the effect of the spring 47, against the bottom of a ramp

  fixed 67 similar to the ramp 74 in Figure 14. It con-

  has just pointed out that the axis 16 of the jaw crosses the slide 21 "" through a slot 68 so as to allow the movement of the slide

  21 "" and that a clearance 69 is provided between the front end

  the piston 61 and the bottom of the bore 62 of the

  strip 21 "" against which the internal spring rests

laughing 53.

  In the event of a front fall without twisting, the 21 "" slide

  is pushed back by the jaw 15 in compression

  mant the two springs 47 and 53, as shown in FIG. 18. The lever 24 "" rocks slightly on the ramp 67 so that the fulcrum of the piston 61 on the domed wings 60 moves upwards,

  as in the previous forms of executions.

  During a strong twist on the binding, the body 13 pivots and the roller 66 moves on the ramp 67, a

  either side of The position shown in fi

2643567 18

  gure 17, which has the effect of driving the Lever 24 ""

  and the piston 61, which compresses the spring 47 as

  presented in Figure 19. The fulcrum of the piston 61 on the domed wings 60 moves downward, as in the previous embodiments. The 21 "slide

  remains stationary and the spring 47 is not compressed.

  After the lateral exhaust of the shoe, the ramp 67 brings the body 13 back to its initial position. If the fastener is stressed both in torsion and by a

  fall forward or back depending on whether it is a heel-

  or from a front stop, the displacements represent

  ties add up, but not the energies.

  In the case of the first and second forms of execution

  tion, it is also possible to provide two res-

  spells acting respectively only on one of the Levers 21 and 24. Starting from FIG. 10, such an execution can be obtained by modifying the shape of the levers 21 and 24 and the shape of the pistons 45 and 52. Such a modification is shown in Figure 20. The relatively narrow 24 "'Lever is mounted in a

  groove 79 of the Lever 21 "'. The end of the piston

  laughing 45 'has two wings 80 coming respectively

  lean on Leverage lever 21 "'on each side of La rai-

  nure 79. The width of the internal piston 52 'is equal to

the width of the lever 24 "'.

  The principle according to the invention is also applicable

  to a fixed body attachment. Figures 21 and 22 show

  very schematically present a first example of

  production. In order to better highlight the equi-

  valence of the functions of the parts of this front stop, we have voluntarily used the same references as

  in Figures 1 and 2 for Functional parts cor-

respondents.

2643567 19

  The binding comprises a fixed body 13 on which a jaw 15 is articulated about a horizontal axis 16. The shoe 1 is retained laterally by two levers 33 'and 34' pivoting on fixed vertical axes 35 'and 36'. One end of the levers 33 'and 34' rests on the head 81 of a pull-up bar

  21 (first mobile) whose other end is articulated

  lée by an axis 23 at the end of a lever 24 (second mobile) whose other end has a spout 24a resting on a ramp of the jaw 15. On the curved face of the lever 24 is supported a piston 17 pulled by a spring 18 which rests on a part 82 integral with the body 13. We find the same diagram of forces as in FIG. 1 a (represented in FIG. 21a) and the same considerations are applicable as regards the variation of the lever arms and of the forces P1 and P2 and of the vertical pressure exerted by the jaw 15 on

  the shoe. Used as a front stop, this construction

  In addition, the advantage of automatically adapting

  the height of the jaw to the shoe.

  The variant shown schematically in

  Figure 23 is no different from the previous form of execution.

  tion only by the mode of application of the le-

  vier 24 à La jaw. In this case the lever 24 is articulated at the end of an arm 83 of the jaw 15

around an axis 84.

  In all forms of execution, the same effect for-

  could be obtained by giving the piston a cylindrical convex shape and a flat bearing face on the levers 24,

24 ', 24 ".

2643567 20

Claims (14)

  1. Safety ski binding intended to hold the heel or the end of the foot, comprising a body (13;   13 '), a jaw (15; 64) articulated on this body au-   turn of a horizontal axis, lateral retaining means   rale of the shoe (33,34,10,11; 66,67; 73,74; 70; 33 ', 34', 35 ', 36'), elastic means, at least in   common parts, reminder of the lateral restraint means   line and the jaw in the closed position of the fastener, these return means comprising at least one spring (18; 47, 53; 18 ") acting by means of at least one piston (17; 45, 52; 17 ") on a transmission mechanism, mobile in rotation or in translation, interposed between, on the one hand, the piston, and, on the other hand, the jaw and the lateral retaining means, characterized in that said mechanism transmission includes two mobile articulated one on the other (21,24; 21 ', 24'; 21l ", 24"; 21 "', 24"'; 21. '., 24.'l) around   an axis parallel to the axis of the articulation of the   choir on the body, one of these mobiles (21; 24 "; 21" '; 21 "") being permanently supported on the jaw and the other mobile (24; 21 "; 24'; 24" ' ; 24 "')   being permanently in support, directly or indirectly-   ment, against the lateral retaining means, the piston, respectively the pistons, being in abutment against one of the mobiles in a place situated between its articulation (23) on the other mobile and its part in abutment on the jaw, respectively on the lateral retaining means. 2. Attachment according to claim 1, characterized in that the body (13) is pivotally mounted on a vertical pivot (14; 61) and that the laterate retaining means   include at least one fixed stop (10,11; 74; 75). 2643567 21   3. Fixing according to claim 2, characterized in that all the moving parts of the transmission mechanism are permanently in linear contact- respectively   with the piston, the jaw and the stop.   4. Attachment according to claim 3, characterized in that the two mobiles consist of two levers (21, 24), ie a first lever (21) articulated around   from an axis parallel to the axis of articulation of the jaw   re and provided with a spout (21a) resting on a ramp (15a) of the jaw and a second mobile (24) articulated in the upper part of the first mobile around a   axis (23) parallel to the articulation axis of the mà-   choire, extending downwards and the end of which is   directly or indirectly based on respect-   strongly the stops (10, 11; 74) for the recall of the body in torsion.   5. Attachment according to claim 4, characterized in that the axis (22) of the articulation of the first lever (21) intersects the pivot axis of said body and that the lower end of the second lever (24) is supported on at least one lever (33, 34; 71) including one arm rests on the fixed stop.   6. Fastening according to claim 5, characterized in   that the second lever (24) is supported, by means of   diary of a transmission rod (26) on two levers   (33, 34) pivoted around two symmetrical vertical axes   only on either side of the longitudinal axis of the binding and one arm of which rests respectively on two fixed stops (10, 11) arranged symmetrically   on either side of said longitudinal axis.   7. Attachment according to claim 5, characterized in that the end of the second lever (24) rests on 2643567 22   a lever (71) pivoted about a parallel horizontal axis   lele to the hinge axis of the levers, this lever (71) being provided with a roller (73) resting on a stop in cam shape (74).   8. Attachment according to claim 2, wherein the fixed stop is constituted by a vertical flat (70)   said vertical pivot (61), flat against which rests   directly draws said transmission mechanism (21 ", 24"), characterized in that one of the mobiles (73) consists of a sliding part pressing on a flat face against the stop and that the other mobile is   constituted by a lever (24 ") articulated by an end   mite on said sliding part and of which the other ex-   end is articulated on the jaw (64).   9. A binding according to claim 4, characterized in that it comprises two coaxial springs (47, 53), one of the springs cooperating with a first piston (45) resting on the curved part of the second lever (24) in the closed position of the attachment, the second spring (53) acting on a second piston (52) capable of being pushed back under the first piston (45), the second lever (24) also being in abutment against the second   piston (52) when lifting the jaw.   10. Attachment according to claim 2 or 3, character-   sée in that the two mobiles consist of a slide (21 "") bearing on the jaw (15) and on which acts a first spring (53) and a lever 24 "") articulated by the one of its ends, on said slide and on which a second spring (47) acts via a piston (61), the other end of the lever being provided with a roller (66) resting on a fixed ramp (67). 2643567 23   11. A binding according to claim 4, characterized in that it comprises a first spring (47) acting exclusively on the first lever (21 "') and a second   spring (53) acting exclusively on the second le-   sink (24 ', figure 20). 12. Attachment according to claim 1, characterized in that said body (13 ') is fixed and that the lateral retaining means are constituted by two levers (33', 34 ') mounted on fixed vertical axes (35', 36 '), one of the ends of these levers acting on a first mobile (21) on which is articulated the end of a second mobile consisting of a lever (24) whose other end is supported on the jaw (15),   said piston (17) bearing on said lever.   13. Attachment according to one of claims 1 to 12, ca-   characterized in that the front face of the piston is   plane and the mobile bearing against the pre-piston   feels a convex cylindrical surface, generative   parallel to the articulation axis of the mobiles, in con- tact with the piston.   14. Attachment according to one of claims 1 to 12, ca-   characterized in that the piston has a surface   generator cylindrical parallel to the articulation axis   lation of mobiles and that The face of the mobile in support against the piston is flat.