EP0774999B1 - Front clamp for a safety ski binding - Google Patents

Abstract

A front clamp for a safety ski binding with a housing (1) and twotwo-armed angle levers (9a, 9b) which can pivot in a substantially vertical axis on a pillow block (6) which can move to a limited extent in the housing and engage with a release plate (25) which is fitted to pivot on the housing (1) and to which is applied the force of a release spring (14) via a tensioner (28) acting in the forward direction. The forward end of the tensioner (28) engages with a spring support (15) movable along a central bolt (16) and the central bolt (16) is supported on the front face of the housing (1) via a bolt head (17) and connected via a thread (18) to a spring support plate (19) to which the force of the release spring (14) is applied.

Description

The invention relates to a toe for a safety ski binding with a a ski attachable housing and with two two-armed angle levers, which on one in the Housing restricts the movably mounted bearing part around an essentially vertical axis are pivotable, the outer, longer arms of both angle levers as Sole holders are formed and the inner, shorter arms of both angle levers attack a trigger plate, which on a substantially transverse axis Housing pivotally mounted and by one housed in the housing with her front end supported on a spring holder, surrounding a central bolt Release spring via a connecting element with a forward pull is acted upon.

A toe of this type which has become known from EP-A-365 861 has one Tripping plate, which runs around a transverse axis in the upper or lower housing area is pivotable. The release spring surrounds the central bolt, which acts as a pull rod for the Release plate works. For this purpose the front end of the bolt is in an adjusting nut screwed, against which the front end of the release spring is supported. This front one The end of the spring can thus be moved together with the adjusting nut with respect to the housing, whereas the rear end of the release spring is supported on a wall fixed to the housing.

A similar construction is shown in AT-PS 396 337, which, however, does not belong to the state of the art, since after the filing date of the Invention has been published. In this document, a Front jaws described, in which two angle levers on a common bearing part are each articulated a vertical axis, this bearing part on the housing upwards and is pivotally mounted laterally. Both angle levers engage a release plate that is connected with a bolt, which extends from the release spring via the adjusting screw is tensile at the front. The release spring is fixed to the housing immediately in front of the release plate stored and supported at its front end via a guided on the housing Take off the spring retainer on the adjusting screw. The adjusting screw and the one with the release plate connected bolts are screwed together by means of a thread, whereby the desired bias of the trigger spring is generated. Furthermore, is on the spring mount Pointer attached, which the default setting of the trigger spring on a window visible display.

A disadvantage of the front jaws known from the two documents mentioned above is therein to see that the binding setting display changes when the release spring is loaded becomes. This means that the display changes in an undesirable manner when the Skier climbs into the binding with his ski boot. Furthermore, the housing is due to the Storage of the trigger spring is not completed at the front and it can happen that the Effect of the release spring, for example, is impaired by dirt, snow or ice.

DE-A 39 00 217 shows a very complicated construction, in which the angle levers are in turn mounted on lateral, two-armed levers. This side Levers are pressurized by a piston loaded by the release spring. For the backward release this piston is also extended backwards, with one on Arms of the extension of the seated cross bolt is guided along a ski-fixed control curve An axial rod passing through the release spring is fixed to the housing with its rear end stored, the front end of the rod, however, is not on the front face of the housing supported. With this toe piece, a pointer is connected to the spring support plate.

It is an object of the invention to provide a toe piece in which the above mentioned disadvantages are avoided, the structure mechanically simple and against Environmental protection is well protected.

This object is achieved by means of a toe piece of the type mentioned at the beginning which, according to the invention, the connecting element is a pull piece, which with its front Engages the end of the spring seat, which is displaceable along the central pin, the central bolt by means of a bolt head on the front face of the housing supported and via a thread with one acted upon by the release spring Spring support plate is connected.

By means of the measures according to the invention, the trigger spring and the effect of this trigger spring on the trigger plate mechanically separated, which the Display of the binding setting is not changed even when the release spring is loaded. Furthermore, the housing of the toe piece can be made closed, as a result of which the Probability of the toe function due to snow, ice, or dirt is impaired, is significantly reduced. By the lever system, which by the pivotable trigger plate is generated, is a particularly good trigger behavior Reverse or reverse turning falls can be achieved because of the friction losses that occur be kept extremely low.

In an advantageous embodiment of the invention, the release plate is in the lower part of the Housing mounted and it extends substantially vertically upwards, the inside Anne the angle lever lies in the upper area of this release plate on the front attack. Furthermore, the tension piece, which is guided to the spring mount above the release spring, engages at the top of this trip plate. This makes it a simple and space-saving assembly of the toe piece with good leverage possible. In addition, this particular arrangement of the release plate allows a simple one Reverse trip construction. Another advantage of this embodiment is that the Freedom of movement of the tension member due to contamination, such as snow, ice or dirt, is not affected, which collect in the lower part of the toe piece.

A simple mechanical construction is made possible by the fact that the pull piece is plate-shaped and bent at both ends, the front bent End is stored between the spring holder and the housing and the rear bent End is hooked into a recess provided at the upper end of the release plate.

A pointer is expediently connected to the spring support plate, which pointer set preload of the release spring on a housing-fixed display. As before was mentioned earlier, the position of this pointer with respect to the housing or housing-fixed display in an advantageous manner only by the default setting Trigger spring determined.

Furthermore, a stop in the form of a substantially vertical can behind the release plate Transverse wall can be arranged, a between the release plate and this transverse wall elastic filler, for example made of foam rubber, is inserted. The cross wall also prevents any contamination, especially snow or Ice in the inside of the toe. If contamination of any kind in the Toes reach, the elastic filler prevents the Trigger mechanism is impaired or even blocked by such contaminants.

The reverse as well as the diagonal release is constructively improved by that the release plate has a transversely arranged cam, on which one on the bearing part trained lever extension when pivoting this bearing part against the force the trigger spring works.

The desire for an inexpensive and easy to manufacture toe piece is met by a preferred embodiment of a toe piece according to the invention corresponded to the fact that the bearing part consists of an upper part element and a lower part element exists, and the sub-elements are positively connected to each other in the state of use, wherein the angle levers are mounted on the lower part and the upper part on its front side has a support surface, by means of which the bearing part on the housing is supported.

Through the measures according to the invention, the part of the bearing part on which the Angle levers are mounted, and the part that has a support surface for the Reverse release bears separate in terms of manufacture, so this manufacture can be done particularly inexpensively. In particular, a single lower sub-element for all types of binding are produced in a larger series. The upper part can be made of a cheaper material that is easy to work with, especially in terms of color are manufactured.

An advantageous embodiment of the support surface results in the above Embodiment from a first, substantially vertical section, a overlying second, slightly backward sloping section and a overlying third, more backward sloping section, the first of these Sections over an edge in the second section and this over another edge passes into the third section of the support surface.

Furthermore, it is advantageous if the upper part element of the bearing part is curved Has bearing surface over which the bearing part upwards on one in the housing provided storage setting is supported.

It is particularly advantageous if this curved bearing surface is close to the Support surface is formed and - viewed from the side - a circular section and has a straight section sloping towards the rear

The center point of the circular section of the bearing surface preferably lies in close proximity of the edge between the first and second subsection of the Support surface, in particular at the same level with this edge.

A simple positive connection of the upper and lower part of the The bearing part is held by two bolts which run essentially vertically through the bearing part manufactured, with an angle lever being mounted on each of these bolts.

For the purpose of particularly cost-effective production, the two sub-elements of the Bearing part made of different materials, the upper part element preferably made of Plastic and the lower part preferably made of steel or die-cast aluminum is made.

Figur 1 einen schematischen Längsmittelschnitt durch einen erfindungsgemäßen Vorderbacken,

Figur 2 eine schematische Draufsicht des Vorderbackens nach Figur 1.

Figur 3 eine Detail-Seitenansicht eines Längsschnittes durch den Lagerteil.

Further details and advantages of a toe piece according to the invention will become apparent from the following description, which was created with reference to the accompanying figures, in which an exemplary embodiment of the present invention is shown and which show:

FIG. 1 shows a schematic longitudinal central section through a front jaw according to the invention,

FIG. 2 shows a schematic top view of the toe piece according to FIG. 1.

Figure 3 is a detailed side view of a longitudinal section through the bearing part.

In the following reference is made to FIGS. 1 and 2, in which a Front jaw according to the invention is shown with a housing 1, which consists of a Upper housing part 2 and a lower housing part 3. 2, the upper housing part 2 not shown for reasons of clarity. There are holes in the lower housing part 3 4a, 4b, 4a ', 4b', 4a '', 4b '' are provided which screw the toe piece to the ski enable by means of suitable bolts. Furthermore, the lower housing part 3 with the Screwed upper housing part 2, for which purpose two further bores 5a, 5b are provided. A bearing part 6 is attached to the housing 1 by means of a support surface 7 Transverse wall 8 of the upper housing part 2 with limited mobility. At this bearing part 6 are two angle levers 9a, 9b by means of bolts 10a, 10b each around an essentially vertical axis pivoted. The exact design of the bearing part 6 and the support surface 7 will explained in more detail below with reference to FIG. 3.

The angle levers 9a, 9b are designed with two arms, the outer arms of the angle levers 9a, 9b are designed as sole holders 11a, 11b and the shorter, inner arms 12a, 12b, this angle lever 9a, 9b via a cam 13a, 13b from a release spring 14 of the Toe are subjected to a forward pulling force. The trigger spring 14 in the embodiment shown here consists of two coaxial coil springs, of which only the outer one is shown in FIG. 2 for reasons of clarity. This Release spring 14 is supported at its front end on a spring holder 15 which is horizontally displaceable along a pin 16. The bolt 16 has one end a bolt head 17, which is embedded on the front side of the housing 1. The other At the end, this bolt has a thread 18 which is screwed to a spring support plate 19 against which the trigger spring 14 is supported with its rear end. The bolt 16 with the head 17 and the thread 18 forms the adjusting screw 20 of the toe piece, by means of which the bias of the trigger spring 14 is set in a known manner. This Setting the trigger spring 14 is by means of a pointer 21 on a housing-fixed display 23 is displayed, which can be viewed via a window 24 provided in the upper housing part 2. The Pointer 21 is fixedly connected to the spring support plate 19 via a holder 22. In which The embodiment shown here is this holder 22 between the spring support plate 19 and the trigger spring 14 inserted.

The type of power transmission between the trigger spring and the inner arms 12a, 12b of the Angle lever 9a, 9b (with lateral or diagonal loading) or on the bearing part 6 (with Load upwards or with diagonal load) is explained in more detail below. in the A central release plate 25 is in the area of the bearing bolts 10a, 10b for the angle levers 9a, 9b pivotable about a transverse axis by means of two stub axles 26 on the lower housing part 3 stored. The release plate 25 extends from the bearing point in that shown in FIG. 1 Rest position essentially vertically upwards. At the top of this trip plate 25 The cams 13a, 13b there engage symmetrically to the longitudinal central axis of the toe piece inner arms 12a, 12b of the two angle levers 11a, 11b. Widening is at the top the release plate 25, a central recess 27 is provided, in which a bilateral bent traction piece 28 is suspended with a bent end 29. This pull piece 28 leads through an opening 31 provided in the bearing part above the release spring 14 forward where the other bent end 30 of this pull piece 28 on the horizontal displaceable and acted upon by the release spring 14 spring mount 15. The Tension piece 28 is thus forward via the spring receptacle 15 from the release spring 14 acted upon, whereby on the release plate 25 and on the inner arms 12a, 12b Angle lever 10a, 10b acts a forward pull.

On the release plate 25 there is additionally a transversely located cam 32, approximately halfway up formed which is associated with a lever extension 33 formed on the bearing part 6. In a certain distance behind the release plate is a stop on the lower housing part 3 in the form of a transverse wall 34, wherein in the space between the Release plate 25 and this transverse wall 34 an elastic filler 35, for example Foam rubber is inserted.

The bearing part 6 shown separately in FIG. 3 consists of an upper part element 6 'and a lower sub-element 6 '', these sub-elements 6 ', 6' 'in the state of use by means of Bearing bolts 10a, 10b for the angle levers 9a, 9b are riveted together, so that one positive connection results. The bolts 10a, 10b are stored as in the figures 2 and 3 can be seen on two bores 10a ', 10a' '; 10b ', 10b' ', one on top of the other two substantially horizontal tabs 106a ', 106a' '; 106b ', 106b' 'of the bottom Sub-element 6 '' of the bearing part 6 are provided. This lower part element 6 '' of the bearing part 6 is also made of a material suitable for this purpose, preferably steel or Die-cast aluminum, manufactured.

The support surface 7 of the bearing part 6 is on the front of the upper part element 6 ' formed and has a lower, substantially vertical portion 7 ', one above Slightly sloping back section 7 '' and another, more backwards inclined section 7 '' 'on the transitions between the substantially flat Sub-sections 7 ', 7' ', 7' '' of the support surface 7 are designed in the form of two edges 7 *, 7 **, the lowest section 7 'over a first edge 7 * in the overlying Section 7 '' passes over and this over the second edge 7 ** in the further, above lying subsection 7 '' 'passes over, so that during the rolling movement of the bearing part 6 on the Cross wall 8 of the housing (e.g. in the case of reverse triggering) defined support points 7 *, 7 ** arise (with a pure reverse triggering this support point is actually one Support line, therefore under the term "support point" in the following also "support line" be understood). The upper part is made of an easy-to-process material, preferably plastic; manufactured and already wears the color for the from above visible part is provided so that a separate coloring is no longer required.

Furthermore, on this upper part element 6 'of the bearing part 6 on both sides of the Longitudinal center plane each formed a curved bearing surface 107, by means of which the bearing part 6 is supported upwards on a bearing link 108 formed in the housing 1, which consists of a curved front 108 'and a rearward flat portion 108 ″, with the curved section 108 ′ forward into the housing transverse wall 8 transforms. The curved bearing surface 107 is in the immediate vicinity of the support surface 7 arranged and consists of a circular section 107 'and one to the rear sloping straight section 107 ''. The center of the circular section 107 'lies preferably at the same level with the edge 7 * of the support surface 7, so that the effect this edge 7 * is supported as a defined support point. The one falling backwards Section 107 ″ permits a pivoting movement of the bearing part 6 upwards until the latter Section 107 ″ comes into contact with the flat section 108 ″ of the bearing link 108. Out of it In the non-pivoted state of the bearing part, the condition arises that the angle, the the subsection 7 ″ of the support surface 7 encloses with the vertical, smaller than that angle which the sloping section 107 ″ of the bearing surface 107 encloses with the horizontal, The effect of the second edge 7 ** is made possible as a further defined support point.

The mechanical construction of the toe piece described above is suitable for a Allow the ski binding to be released laterally, upwards and diagonally. The Interaction of the different mechanical components during a triggering process among other things already in detail in the aforementioned patent specification AT-PS 396 337 has been described and is therefore only briefly explained below.

When the toe piece is released from the side, one of the sole holders 9a, 9b is around the respective bolts 10a, 10b pivoted outwards. The corresponding inner arm 12a or 12b of the sole holder moves rearward, causing the release plate 25 to be around them Swivel axis 26 is pivoted to the rear. This swivel movement is over the Transfer piece 28 to the spring receptacle 15, so that this along the pin 16 of the Adjusting screw 20 slides backwards against the force of the release spring 14 until the ski boot is released laterally by the loaded sole holder.

When triggered backwards, the angle levers 9a, 9b and thus also the bearing part 6 pivoted upwards, the bearing part 6 with its on the upper part element 6 ' trained support surface 7 rolls on the housing-fixed transverse wall 8. At this Pivotal movement engages the lever extension 33 of the bearing part 6 on the cam 32 Trigger plate 25 and pivots this trigger plate as described above against the Force the release spring 14 backwards until the ski boot goes up from the sole holders is released.

Such a pivoting movement of the bearing part 6 upwards consists of the following partial movements explained in more detail. In the non-pivoted state of the bearing part 6 (Fig. 1) the first section 7 'of the support surface 7 on the housing transverse wall 8. With one after above pivoting of the bearing part 6, this is for the time being between the lowest Section 7 'and the overlying section 7' 'of the support surface 7 formed Edge 7 * tilted, creating a defined support point and thus a constant one Lever arm results and the bearing part against an approximately constant spring force upwards is pivoted until the second section 7 ″ of the support surface 7 on the housing transverse wall 8 is in plant. During this movement, the bearing surface 107 of the upper part element rolls 6 'of the bearing part 6 at the same time on the bearing link 108 of the housing 1. Another Pivotal movement of the bearing part 6 upwards is this over the above the edge 7 * lying edge 7 ** tilted, whereby on the housing transverse wall 8 again a defined Support point or an approximately constant lever arm is fixed. However, this lever arm is longer than the lever arm defined by the edge 7 *, which means that for this further Swiveling the bearing part 6 required release force suddenly a higher value assumes. In the area of this swivel movement, the trigger point of the toe is included a backward release, which is defined in that the sole of the shoe from the Sole holders is released upwards.

With such a release mechanism, the inner arms 12a, 12b also receive the Angle levers 9a, 9b have a certain exemption, which makes the angle levers advantageous can also be swiveled sideways without additional effort.

In practice, a mixed load (sideways and upwards) very often occurs, so that the Release mechanism mostly from components of a side and backward release consists.

In conclusion, it should be noted that the constructive details described above this Invention represent no restrictions, for example, the trigger plate 25 be stored in the upper housing part 2 and extend substantially downwards or it the tension member can also be arranged below or to the side of the release spring 14.

Claims (14)

1. Front jaws for a ski safety binding with a housing (1) which can be fixed to a ski and with two double-armed angle levers (9a, 9b), each of which is swivellable around an essentially vertical spindle on a bearing part (6) supported with limited movability inside the housing, whereby the outer, longer arms (11a, 11b) of the two angle levers are formed as sole-retainers and the inner, shorter arms (12a, 12b) of the two angle levers act upon a release plate (25), which is supported able to swivel about an essentially transversely running spindle (26) on the housing (1) and to which over a connecting element a forward-directed pulling force is applied by a release spring (14) accommodated in the housing with its front end supported by a spring retainer (15), said release spring (14) being located around a central bolt (16), characterized in that said connecting element is a tension piece (28) acting with its front end upon the spring retainer (15), which is moveable along a central bolt (16) whereby the central bolt (16) is supported at the front face of the housing (1) by a bolt head (17) and is connected through a thread (18) with a spring support plate (19) subject to pressure from the release spring (14).
2. Front jaws according to Claim 1, characterized in that the release plate (25) is supported in the lower part (3) of the housing (2) and essentially extends vertically upwards, whereby the inner arms (12a, 12b) of the angle levers (9a, 9b) act upon the upper region of said release plate (25) at its front face.
3. Front jaws according to Claim 1 or 2, characterized in that the tension piece (28) acts upon the upper end of the release plate (25) and is led above the release spring (14) to the spring retainer (15).
4. Front jaws according to one of the Claims 1 to 3, characterized in that the tension piece (28) is plate-shaped and is bent over at both ends, whereby the front bent-over end (30) is supported between the spring retainer (15) and the housing (1) and the rear bent-over end (29) engages in a slot (27) provided at the upper end of the release plate (25).
5. Front jaws according to one of the Claims 1 to 4, characterized in that a pointer (21) is connected, actually in a manner of prior art, with the spring support plate (19), Which pointer (21) indicates at a display (23) fixed to the housing the tension preset in the release spring (14).
6. Front jaws according to one of the Claims 1 to 5, characterized in that behind the release plate (25) a stop is arranged in the form of an essentially vertical transverse wall (34) formed in the lower part (3) of the housing, whereby a flexible filling piece (35), for example of foam rubber, is inserted between the release plate (25) and this transverse wall (34).
7. Front jaws according to one of the Claims 1 to 6, characterized in that the release plate (25) has a transversely arranged cam (32) at which a lever extension (33) on the bearing part (6) works against the force of the release spring (14) if this bearing part undergoes a swivelling movement.
8. Front jaws according to one of the Claims 1 to 7, characterized in that the bearing part (6) comprises an upper part element (6') and a lower part element (6'') and the part elements are in operating condition connected in an interlocking manner with each other, whereby the angle levers (9a, 9b) are supported on the lower part element (6'') and the upper part element (6') has on its front face a support surface (7) by means of which the bearing part (6) can be supported at the housing (1).
9. Front jaws according to Claim 8, characterized in that the support surface (7) has a first, essentially vertical part section (7'), moreover a second part section (7'') sloping slightly to the rear, and moreover a third part section (7''') sloping more strongly to the rear whereby the first of these part sections (7') merges into the second part section (7'') over an edge (7*) and the second part section (7'') merges into the third part section (7''') of the support surface over an edge (7**).
10. Front jaws according to one of the Claims 8 or 9, characterized in that the upper part element (6') of the bearing part (6) also has a curved bearing surface (107) over which the bearing part (6) is supported in an upward direction at a bearing channel (108) provided in the housing (1).
11. Front jaws according to Claim 10, characterized in that the curved bearing surface (107) is formed near the support surface (7) and - viewed from the side - has a circular arc-shaped section (107') and a straight section (107'') dropping down towards the rear.
12. Front jaws according to Claim 11, characterized in that the centre of the circular arc-shaped section (107') of the bearing surface (107) is located immediately adjacent to the edge (7**) between the first (7') and second part section (7'') of the support surface (7), preferably at the same height.
13. Front jaws according to one of the Claims 1 to 6, characterized in that the upper (6') and lower part element (6'') of the bearing part (6) are connected in an interlocking manner with each other, preferably riveted, by means of two bolts (10a, 10b) leading essentially in a vertical direction through the bearing part (6), whereby one angle lever (9a, 9b) is supported on each of these bolts (10a, 10b).
14. Front jaws according to one of the Claims 8 to 13, characterized in that the two part elements (6', 6'') of the bearing part (6) consist of different materials, whereby the upper part element is fabricated preferably from synthetic material and the lower part element is fabricated preferably from steel or die-cast aluminium.

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