EP0199098A2 - Cross-country ski binding - Google Patents

Abstract

1. Cross-country ski binding, comprising a front fixing means for the pivotal mounting of a ski boot for cross-country skiing, the front fixing means having two pivotally mounted and mutually opposing tensioning means which are intended to be pressed in the use position against corresponding recesses or projections arranged on the sides of the ski boot, and comprising a rear block for fixing the ski boot for downhill travel or for supporting the heel part of the ski boot when climbing, characterized in that the tensioning means (9) are held on a respective arm (4') of angular levers (4) pivotable about axes (5) extending in the longitudinal direction of the ski, and the other arms (4") of the angular levers (4) are directed towards one another towards the centre of the ski and are in active connection with one another by means of a spring means at a common joint (10), the joint (10) lying above the bolts (7) forming the axes (5) of rotation of the angular levers (4) in the rest position thereof, that is to say when the tensioning means (9) are unlatched, so that the other arms (4"), directed towards the joint (10), of the angular levers (4) can be snapped into their locked position and into their rest position by overcoming a dead centre position, the joint (10) and thus the angular levers (4) being fixable in the locked position by means of a securing lever (13), and in that the rear block is pivotal about a bolt (19) projecting at right angles from the ski surface into various sprung use positions and has two freely projecting pins (23') which can be brought into active connection with corresponding recesses on the heel part of the ski boot (1).

Description

The invention relates to a touring ski binding, consisting of a front bracket for - pivoting mounting of a ski shoe when touring, the front bracket having two - pivotally mounted and opposing tensioning parts, which at least in the operating position against corresponding recesses arranged on the sides of the ski shoe or Projections are pressed, and from a buttock to fix a ski boot on descents or to support the heel part of the ski boot on climbs.

In a known arrangement for touring skiing (AT-PS 376 577), bolts protruding approximately horizontally and transversely to the longitudinal direction of the shoe over both lateral boundaries of the sole of the shoe are provided in the area of the toe of a ski shoe. Adjustable, but fixable lever arms are arranged on the ski binding, the free ends of which can be brought into operative connection with the bolts protruding from the ski boot to form a fixed axis of rotation. The two lever arms rest on the longitudinal edges of a block-like, fixed binding part, the free ends of the lever arms which can be operatively connected to the bolt on the ski boot projecting beyond the fixed binding part on the ski boot side. This arrangement has proven itself fully, but can still be improved from a constructional point of view, in particular with regard to stability and functionality, since, for example, in the arrangement according to this known embodiment there is a risk that snow will get between the moving parts, which is the functionality can disturb.

A ski binding is also known (AT-PS 315 042, in which levers are arranged below the sole of the shoe and in a plane parallel to the upper side of the ski which is pivotable against a spring force and which have hold-down devices to which abutments provided on both sides of the ski shoe are assigned. For touring, the hold-downs overlap a bolt located near the tip of the shoe, and the ski boot can then be swung up as required when touring, making it possible to use this device for both downhill and touring, but this is particularly disadvantageous out that when touring the ski boot, relative to the length of the ski, a correspondingly large piece is attached offset towards the end of the ski, so that the weight distribution between the boot and ski is hardly correct. The type of arrangement and actuation of the levers is complex and therefore expensive, complete tie rods and tendons must be provided be married.

In most of the touring ski bindings currently in use (e.g. AT-PS 309 292), the front and rear cheeks are connected to each other by a plate or a frame. The ski boot is stretched onto this plate using the cheeks and heel straps. In order to achieve the heel clearance required for walking, the plate has a hinge-like joint at the front for connection to a binding part arranged on the ski. For the descent, the plate can be fixed in the heel area by a locking device on a ski-fixed binding part. An additional sole plate, which must be matched to the ski boot, is always required here.

Arrangements for touring skiing are also used, in which the safety devices are integrated in the sole plate. In the event of a fall, the plate and boot will come off the ski.

The present invention has set itself the task of creating a touring ski binding with which it is possible in a structurally simple and trouble-free manner to pivotally connect the shoe with a ski binding for the ascent, and to fix it for descents with appropriate safety devices without additional Panels or frames are required.

According to the invention, it is proposed that the clamping parts are held on one arm by angle levers which can be pivoted about axes extending in the longitudinal direction of the ski, the angle levers being spring-loaded in their locking and in their rest position by overcoming a dead center position.

The buttocks provided according to the invention can be pivoted about a bolt projecting at right angles from the ski surface into various spring-loaded positions. It is further provided according to the invention that the buttock has two freely projecting pins which can be brought into operative connection with corresponding depressions on the heel part of a ski boot.

The measures according to the invention ensure that the shoe can be pivoted by approximately 90 °. For the descent, the heel of the shoe can be brought into operative connection with the buttock, so that the shoe is held down, but when the correspondingly large forces occur, such as those that occur during falls, the heel of the shoe upwards as well as laterally. Since the construction according to the invention makes it possible to dispense with plates or frames, this results in a substantial weight saving.

In addition, the special construction of the toe ensures that snow that may have entered the binding parts cannot cause any problems in the effectiveness of the binding. Furthermore, this construction has made it possible to ensure a quick entry into the front binding and a release. The respective overcoming of a dead center position ensures a secure locking and a rest position.

It is also proposed that the clamping parts be designed as a truncated cone or hemispherical pin at their insert end. This enables rapid centering in the recesses in the ski boot.

It is also proposed that the clamping parts on one arm of the angle lever are adjustable, but are held in a fixable manner. This makes it easy to adapt to different shoe sizes.

According to the invention it is further provided that the one arms of a pair of angle levers carry the tensioning parts and the other arms are directed towards one another towards the center of the ski and are operatively connected to one another via a spring device. In this way, the possibility is created in a simple manner of guiding the clamping parts either into the locking position or into the rest position via a dead center position.

According to a further proposal of the invention, rods protrude from the two ends of the other arms of the two angle levers, the free ends of which lead to a common joint, the rods slidably engaging in the arms and / or in the common joint and in each case between the arms and a spring is inserted into the joint. This makes it possible to compensate for the length of the other arms in a simple, constructive manner, which results from the pivoting of the arms.

Since the joint in the rest position of the angle levers, that is to say when the tensioning parts are disengaged, lies above the bolts forming the axes of rotation of the angle levers, a snap-in process of the front jaw can be triggered as soon as the sole of the ski boot is stepped on.

In order to enable the snap mechanism to be opened and the movement of the joint to be limited upward, the joint engages in a fork-shaped opening of a two-armed actuating lever which can be pivoted about an axis running transversely to the longitudinal direction of the ski, the fork-shaped opening being formed on one arm of the actuating lever and at the free end of the other arm, an eccentric disc rotatable about the longitudinal axis of the actuating lever is arranged. As a result, the two end positions of the actuating lever can be fixed, in which case the actuating lever itself rests on the ski surface and, in the other end position, support can be provided by the eccentric disk pivoted downward.

A very simple way of connecting the heel part of the ski boot to the buttock is provided if the buttock can be pivoted into different, spring-loaded insert positions by a bolt projecting at right angles from the ski surface and if the buttock also has two freely projecting pins, which have corresponding depressions on the heel part of a ski boot can be brought into operative connection. It is thus possible to press the two pins apart in a resilient manner, whereupon they can then snap into the corresponding recesses on the heel part of a ski boot.

According to the invention it is further proposed that the bolt carrying the buttocks have a plurality of flats on its circumference as locking points of a bolt and spring element for different positions of the buttock. The buttocks include fixable in a non-engagement position, i.e. one outside the range of motion of a ski boot used on the toe piece. It is therefore possible in a simple manner, e.g. set a high climbing aid or a low climbing aid so that, depending on the steepness of the terrain, climbing aids are available when climbing. If no climbing aid is desired, the buttock can be placed completely at right angles to the longitudinal direction of the ski, the buttock also engaging in this position.

The invention is explained in more detail in the following description with reference to the drawings. 1 shows a plan view of a toe of the touring ski binding with a ski boot inserted; Figure 2 is a section along the line I -I in Fig. 1. 3 shows a section along the line 11-11 in FIG. 2; FIG. 4 shows the same section as FIG. 3, but showing the rest position of the toe without a ski boot inserted; 5 is an oblique view of a clamping part of the front jaw; 6 shows a longitudinal vertical section through a buttock with an inserted ski boot; Fig. 7 is a view along the line III-111 in Fig. 6; FIG. 8 shows a top view of the arrangement according to FIG. 6, partially cut away; 9 shows a side view of a ski section with a ski boot inserted, the position for relatively steep climbs being shown; 10 and 11 show a side view and a top view of the buttocks of the touring ski binding with an inserted ski boot, the buttocks assuming a locking position for the shoe; Fig. 12 shows a section through a bolt carrying the buttocks in an enlarged view compared to FIGS. 6 and 8.

In the following, the toe pieces are first explained in more detail with reference to FIGS. 1 to 5. The ski boot 1 has a transverse bolt 2 in the tip of the shoe, at the ends of which there are conical depressions 3. It would also be possible for these recesses 3 to be provided in a shoe sole from the outset. Otherwise, it is possible to insert this pin 2 later.

This toe piece has angle levers 4 which are held so as to be pivotable about an axis 5 parallel to the longitudinal direction of the ski. The pivoting bracket is carried out on bolts 7, which are embedded in mounting brackets T. These bearing brackets 7 'are part of a base plate 6 which is connected to the ski body 8 by screws 8'.

Span'nteiie 9 are attached to one arm of the angle lever 4, which engage in the recesses 3 at the toe in the locked position. These clamping parts 9 are designed as a truncated cone or hemispherical pin at their insert end, so that rapid centering in the recesses 3 is possible. These clamping parts 9 advantageously have on their outer circumference in the longitudinal direction or - helical grooves 17 (see FIG. 5) in order to "drill" snow that may be present from the depressions 3. In addition, it is expedient in this context if the clamping parts 9 are designed as sleeves with a bore running through in the axial direction.

In order to provide an adjustment option for the front jaw and thus to allow adaptation to different shoe sizes or the like, the tensioning parts 9 on one arm 4 'of each angle lever 4 are adjustable, but can be held in place. The simplest possibility is to design the clamping parts 9 as pins with an external thread and in the arms 4 '. the angle lever 4 to provide corresponding threaded holes. Lock nuts 16 can then additionally be provided for a firm hold of the clamping parts 9. This adjustment option not only makes it possible to adapt to different shoe sizes, it can also prevent or compensate for any play or wear.

The angle levers 4 are also part of a snap mechanism which allows the front jaw to open and close, i.e. a pivoting of the angle lever 4 should allow.

In Fig. 3 the jaw is shown in the locked position, that is with the shoe 1 inserted. Fig. 4 shows the open rest position of the toe piece.

The one arms 4 'of the angle levers 4 of a pair of angle levers carry the tensioning parts 9 and the other arms 4' 'are directed towards each other towards the center of the ski and are operatively connected to one another via the spring device or a snap mechanism already mentioned.

Rods 11 protrude from the ends of the arms 4 ″ of the two angle levers 4, the free ends of which lead to a common joint 10, the rods 11 slidably engaging in the arms 4 ″ and / or in the common joint 10. A spring 12 is inserted between the arms 4 ″ and the joint 10.

The hinge-like joint 10, which is expediently designed as a cutting edge bearing, as can also be seen from the drawing, is thus connected to the angle levers 4 via the rods 11. The springs are designed as helical springs 12 which are pushed over the rods 11 and which therefore try to push the arms 4 "of the angle lever 4 and the joint 10 apart. In the central position, ie when the rods 11 of both angle levers 4 are aligned with one another and are parallel to the ski surface, the springs 12 are compressed most strongly. From this dead center, the angle levers 4 can pivot to both sides, that is to say either into the position according to FIG. 4 or into the position according to FIG.

In order to make it possible to open the snap mechanism and to limit the movement of the joint 10 upwards, the joint 10 engages in a fork-shaped opening of an actuating lever 13 which is pivotably mounted on the bolt 14 about an axis running transversely to the longitudinal direction of the ski. This bolt 14 is also held in bearing tabs 14 'of a base plate 6.

The opposite end of the fork-shaped opening of the actuating lever 13, that is, the arm of this actuating lever 13 projecting freely at the other end, has an eccentric disk 15 which can be rotated about the longitudinal axis of the actuating lever 13, the largest projection of the eccentric disk 15 approximately matching the ver pivot path of this free end of the operating lever 13 corresponds. As a result, the two end positions' of this actuating lever 13 can be fixed, the actuating lever 13 itself resting on the ski surface in one case and being supported by the downwardly pivoted eccentric disc 15 in the other end position. In the rest position of the angle lever 4, the joint 4 is above the axis of rotation 5 of the Winkelhebei 4. As a result, a snapping process of the toe piece can already be triggered when the sole of the ski shoe appears.

Between the branches of the fork at one end of the operating lever 13 is the joint 10. If the front jaw is closed, as shown in Fig. 2, then by pushing down the operating lever 13 by means of the ski pole or the like (the eccentric disc must of course during this movement the joint 10 is pressed above the dead center: - The shoe 1 is thus released in the region of the toe piece. When stepping into the touring binding, the shoe sole presses on the upper branch of the fork of the actuating lever 13 until the joint 10 passes over the dead center is brought down and then the binding snaps by itself by the spring load.

If the eccentric disc 15 points upwards, that is to say the actuating lever 13 can be pivoted, it is possible, owing to the conical shape of the clamping parts 9 and the depressions 3, to turn the ski boot 1 by a torque about the vertical axis of the boot 1 from the toe, as is the case with a spin is necessary. The angle lever 4 are pressed outwards and the actuating lever 13 pivots downward. This unscrewing of the ski boot is possible with little effort. Therefore, in order not to accidentally slip out of the front jaw during ascent, the pivoting possibility of the angle lever 4 must be prevented. With the eccentric disc 15, the operating lever 13 can be locked. The upper part of the fork of the actuating lever 13 then presses the joint 10 down and thus prevents the binding from snapping open. For the descent, the eccentric disc 15 must be turned up again so that the operating lever 13 can be pivoted again.

6 to 12 show a design variant of the toe binding of the touring binding.

The pivotability of ski boot 1 must be prevented for downhill skiing. For this purpose, a locking device that takes over the safety functions for frontal and turning lintels is proposed. In addition, this buttock has components that can be used as a climbing aid when walking, which is particularly advantageous when there are steep uphill trails. 6 to 8 show the buttocks and the heel of the ski boot in the locked position.

The buttock consists of a cuboid body 18 which is rotatably mounted about a bolt 19 which is attached to the ski 8 and projects approximately at right angles from the ski surface. The bolt 19 has a plurality of flat recesses, as can be seen particularly in FIG. 12. In a bore in the longitudinal direction of the body 18 there is a spring 20 which presses a piston 21 against the pin 19. The bias of the spring 20 can be changed with an adjusting screw 22. When the jaw is rotated from the position shown in FIGS. 6 and 8, the piston 21 is moved backwards and thus the spring 20 is compressed, which results in a turning back moment. This construction makes it possible to snap the buttocks into place on the respective flat surfaces of the bolt 19, that is to say in the positions shown in FIGS. 8, 9 and 11 and also transversely to the longitudinal direction of the ski.

The body 18 also carries pins 23 'made of resilient material, which can be brought into operative connection with corresponding recesses on the heel part of a ski boot. These cantilevered pins 23 'are expediently formed by the free ends of a U-shaped bracket 23. This bracket 23 is held in corresponding recesses on the body 18. The fixation takes place by means of plates 24 and by means of the screwed-on climbing aid 25.

The ends (pins 23 ') of the bracket 23 which project freely over the body can be pivoted somewhat outwards with the appropriate force. A plate-shaped fitting part 26 is screwed onto the heel of the shoe 1, which is designed essentially as a heel that widens from top to bottom and has snap-in points at the upper end. The pins 23 'of the bracket 23 can engage in these latching points. Instead of a screw-on fitting part 26, the shoe heel could of course also be designed accordingly from the outset.

If the ski boot 1 is pivotally anchored in the front jaw, only the heel part of the ski boot needs to be pressed down, so that the freely projecting pins 23 'of the bracket 23 are spread apart over the wedge-shaped part on the fitting 26 until these two ends of the bracket 23 in the snap-in points (recesses) most. In the event of a frontal fall, the ski boot 1 is torn out of this lock again with a certain force. The size of the release force depends on the geometry of the fitting part 26 and on the strength of the bracket 23.

The lateral triggering is ensured in that the shoe 1 runs directly, namely about an axis that is normal to the ski surface and runs approximately through one of the two clamping parts 9 of the toe piece. The eccentric disc 15 may not lock the operating lever 13. This rotation swivels the buttocks until the ski boot 1 is no longer in engagement with the cheeks. The size of the lateral release force can be changed with the adjusting screw.

You can get out of the binding by opening the front jaw with the help of the operating lever 13.

With this binding, the sole of the shoe does not touch the ski, but the ski boot 1 is, so to speak, suspended from the front and rear cheeks. There is a certain distance between the ski 8 and the shoe 1, which makes the touring binding insensitive to the knocking of snow on the sole of the shoe. This also avoids the alternating friction between the sole of the shoe and the ski or the training parts, which can have a major influence, in particular when triggered from the side.

The shoe 1 can also shift a little in the longitudinal direction in the buttock, whereby the influence of binding and shoe on the ski bend is greatly reduced.

The mode of operation of the high climbing aid 25 is shown in FIG. 9. If the buttock is rotated 180 ° from the downward position, it engages again on the bolt 19 due to the flats 19a to 19d. As a result, the ski boot can no longer be swiveled completely towards the ski.

A lower climbing aid can be used for a flatter ascent track. In this regard, reference is made to FIGS. 10 and 11 of the drawings. On the climbing aid 25, an arm projects laterally. If the buttock is swiveled so that it snaps into a position approx. 45 ° to the longitudinal axis of the ski, the lower climbing aid protrudes under the heel and ensures that the boot cannot be swiveled up to the ski.

For short descents with the climbing skins, it is desirable to fix the heel of the ski boot. An easy option is to use the low climbing aid. If the ski boot 1 is placed entirely on the ski 8, as indicated by the dashed line in FIG. 10, and then the buttocks are pivoted into the 45 ° position, the low climbing aid comes to lie over the heel of the shoe and thus blocks an upward movement of the ski boot. If no climbing aid is required, the cheeks can be placed completely at right angles to the longitudinal direction of the ski, whereby the buttocks also engage in this position.

Various construction variants are of course conceivable within the scope of the invention. Thus, it would be possible to provide several parallel rods 11 and coil springs 12 in front jaws instead of one rod and one coil spring 12 each, in order to increase the spring effect if necessary. 3 and 4 it can also be seen that the axis of rotation 5 of the angle lever 4 is not in the angled area of this angle lever 4, but far in the area of the arm 4 "of the angle lever 4. This allows a correspondingly larger path of the arm 4 'of the Angle lever 4 can be reached, so functional improvements are also conceivable here by appropriate design changes.

In the above description it was always said that corresponding depressions 3 are provided in the tip region of the ski boot 1, in which peg-like tensioning parts 9 engage. Of course, a constructive reversal can also be provided within the scope of the present invention, namely by means of bolts which project laterally on the ski boot in the region of the boot tip and over which annular clamping parts which are mounted on the angle levers 4 grip. It would also be conceivable to design the arms 4 'of the angle levers 4 with corresponding recesses for gripping these bolts.

Claims (11)

1.Touring ski binding, consisting of a front holder for the pivotable mounting of a ski boot when touring, the front holder having two pivotally mounted and opposing clamping parts which are pressed at least in the operating position against corresponding recesses or projections arranged on the sides of the ski shoe , and from a buttock to fix a ski boot on descents or to support the _' heel part of the ski boot on climbs, characterized in that the tensioning parts (9) on each arm (4') can be pivoted by axes (5) extending in the longitudinal direction of the ski angle lever (4) are held, the angle levers - (4) being spring-loaded in their locking and in their rest position by overcoming a dead center position. 2. Touring ski binding according to claim 1, characterized in that the tensioning parts (9) are designed as truncated cones or hemispherical pins in their insert end. 3. touring ski binding according to claims 1 and 2, characterized in that the clamping parts (9) on one arm (4 ') of the angle lever (4) are adjustable, but are held fixable. 4. touring ski binding according to claims 1 to 3, characterized in that the one arms (4 ') of a pair of angle levers (4) carry the clamping parts (9) and the other arms (4 ") are directed towards each other towards the center of the ski and via a spring device interact with each other. 5. touring ski binding according to claim 4, characterized in that from the two ends of the other arms (4 ") of the two angle levers (4) projecting rods (11), the free ends of which lead to a common joint (10), the rods ( 11) slidably engage in the arms (4 ") and / or in the joint (10) and a spring (12) is inserted between the arms (4") and the joint (10). 6. touring ski binding according to claim 5, characterized in that the joint (10) in the rest position of the angle lever (4), ie with disengaged clamping parts (9), above the axis of rotation (5) of the angle lever (4) forming bolts (7) lies. 7. touring ski binding according to claims 5 and 6, characterized in that the joint (10) engages in a fork-shaped opening of a pivotable about a transverse to the longitudinal axis axis, two-armed actuating lever - (13) and that on one arm of the actuating lever (13) the fork-shaped opening is formed and an eccentric disc (15) which is rotatable about the longitudinal axis of the actuating lever (13) is arranged at the free end of the other arm. 8. Touring ski binding according to claim 1, characterized in that the buttocks can be pivoted about a bolt (19) projecting at right angles from the ski surface into different, spring-loaded use positions. 9. touring ski binding according to claim 8, characterized in that the buttock has two freely projecting pins (23 ') which can be brought into operative connection with corresponding recesses on the heel part of a ski boot (1). 10. touring ski binding according to claim 8, characterized in that the buttock-bearing bolt (19) on its circumference has a plurality of flats (19a-19d) as locking points, a bolt-spring element for different positions of the buttocks. 11. Touring ski binding according to claims 8 and 10, characterized in that the buttock can be fixed in a non-engagement position, that is to say outside the range of motion of a ski boot used on the toe piece.

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