EP0156159B1 - Cross-country ski binding - Google Patents

Abstract

PCT No. PCT/DE85/00052 Sec. 371 Date Oct. 22, 1985 Sec. 102(e) Date Oct. 22, 1985 PCT Filed Feb. 22, 1985 PCT Pub. No. WO85/03643 PCT Pub. Date Aug. 29, 1985.Cross-country ski binding (1) for cross-country ski shoes (4) with a stretched and downward hook-like front sole end, with a traverse (8) provided to cooperate with the sole end (5) which is arranged in the side jaws (7) extending upwardly from a base plate (6) to be secured to the ski. To maintain in place the front sole end (5) with respect to the traverse (8), there is provided a bridge (9) of a U-shaped stirrup (9, 10) of which the branches (10) are placed by their free ends on the traverse (8). The stirrup (9, 10) is biased by the action of a spring (11) to tighten the front end of the sole (5). The shoes (4) may pivot about the traverse (8) to respond to the resistance of spring (11).

Description

The present invention relates to cross-country ski bindings for cross-country ski shoes with an extended front sole end which is designed as a downward hook and has a cross-piece which is intended to cooperate with the sole end and which is mounted in side jaws which extend upward from a base plate which is to be mounted in a ski-tight manner.

Such cross-country ski bindings are already known from DE-A-2829564. Compared to well-known cross-country ski bindings, they offer the advantage of a particularly simple and failure-resistant construction, since neither the bending of the forward sole end nor part of the ski binding is necessary when the ski boot is lifted off the ski.

In the case of the cross-country ski bindings of the generic type, the traverse is part of a curved wire bracket, which at the same time serves to secure the connection of the ski boot to the ski binding. For this, a special locking cam is required on the forward end of the sole. The wire bracket also extends upwards away from the ski surface when in use. In addition, a swiveling of the ski boot on the crossmember upwards against an initially low and then progressively increasing resistance is not provided in these known cross-country ski bindings.

The present invention aims at designing the generic cross-country ski binding in such a way that the described shortcomings and disadvantages are avoided.

This is achieved according to the invention in that a U-shaped bracket is provided in the binding for the pivotable mounting of the front sole end, the legs of which are supported at their free ends on the crossmember and the web is parallel to the crossmember, so that a front end of the sole is received Frame is formed, and that the bracket is under the influence of a spring that loads it in the sense of pinching the front sole end and against whose resistance the shoe can be pivoted upward about the crossmember. With this design, no special latching cams are required on the extended sole end of the cross-country ski boot. Furthermore, there is no longer any dangerously extending part from the ski. The spring that loads the bow securely holds the boot in the ski binding and, on the other hand, results in progressively increasing resistance when the boot is pivoted.

A first embodiment has proven to be expedient, in which the bracket is designed as a crank arm and is connected via an axle pin to a thrust member which is longitudinally displaceable and pivotable relative to the base plate. In a further development of this inventive idea, a particularly simple construction is achieved in that the thrust member is supported on the base plate with a cam and is held in its inner limit position under the influence of a spring, and in that the spring is designed as a spiral spiral spring and is mounted on the journal. The spring has a double function in this case, by loading the pushing element on the one hand and the bracket on the other hand.

In order to facilitate both the insertion of the boot into the ski binding and its release from the ski binding, a locking lever is provided on the thrust member in a constructive embodiment of the invention, which has a locking hook. The base plate has a barb intended for cooperation with the locking hook and the locking lever is loaded by a retaining spring in the sense of unlocking.

This construction allows an arbitrary hooking of the locking lever on the base plate, whereby the ski binding is given a fixed open position. After the boot has been inserted into the ski binding, it must be lifted in the direction of a running movement until the top of the front sole end comes into contact with the web of the strap, after which, when the boot is pivoted further, the locking lever is hooked to the base plate automatically when the boot is moved is released and the cross-country ski binding is in its working condition.

In a constructive embodiment of this inventive idea, it has proven to be advantageous that the locking lever is articulated on the thrust member parallel to the journal. As a result, the cross-country ski binding is not only easy to make, but also easy to use.

An embodiment of the cross-country ski binding according to the invention, in which a thrust member which is longitudinally displaceable on the base plate is avoided and which is thus even easier and more secure against wear, is achieved in that the web of the stirrup is provided with a depression which extends in the longitudinal direction of the ski and is opposite the crossbar and that a locking lever is provided for interacting with the bracket, which is mounted on an axis parallel to the crossbar in the side jaws and is loaded in the sense of unlocking by a retaining spring.

In this construction, the spring loading the bracket is preferably designed as a tension spring and suspended on the axis of the locking lever.

According to a further feature of the invention, the retaining spring can be designed as a spiral spiral spring and mounted on the axis of the locking lever. In this case, a compact and closed design can be achieved.

• Fig. eine erste Ausführung der Langlaufskibindung im mittleren Längsschnitt,
• Fig. 2 eine Draufsicht auf die Langlaufskibindung,
• Fig. 3 einen Schnitt entsprechend der Fig. 1 im Momentanzustand beim hochgeschwenkten Langlaufskischuh,
• Fig. 4 eine Langlaufskibindung gemäss einer zweiten Ausführung im mittleren Längsschnitt,
• Fig. 5 eine Draufsicht auf die Langlaufskibindung nach Fig. 4,
• Fig. 6 einen der Fig. 4 entsprechenden Schnitt in der Offenstellung der Bindung,
• Fig. 7 einen Schnitt entsprechend der Fig. 4 im Momentanzustand bei hochgeschwenktem Langlaufskischuh,
• Fig. 8 eine Langlaufskibindung gemäss einer dritten Ausführung im mittleren Längsschnitt,
• Fig. 9 eine Draufsicht auf die Langlaufskibindung nach Fig. 8,
• Fig. 10 einen der Fig. 8 entsprechenden Schnitt in der Offenstellung der Bindung, und
• Fig. 11 einen Schnitt entsprechend der Fig. 8 im Momentanzustand bei hochgeschwenktem Langlaufskischuh.

Exemplary embodiments of the cross-country ski binding according to the invention are described in detail below with reference to the accompanying drawings. Show it:

• 1 shows a first embodiment of the cross-country ski binding in the middle longitudinal section,
• 2 is a plan view of the cross-country ski binding,
• 3 shows a section corresponding to FIG. 1 in the momentary state with the swung-up cross-country ski boot,
• 4 is a cross-country ski binding according to a second embodiment in the middle longitudinal section,
• 5 is a plan view of the cross-country ski binding of FIG. 4,
• 6 shows a section corresponding to FIG. 4 in the open position of the binding,
• 7 shows a section corresponding to FIG. 4 in the current state with the cross-country ski boot pivoted up,
• 8 is a cross-country ski binding according to a third embodiment in the middle longitudinal section,
• 9 is a plan view of the cross-country ski binding of FIG. 8,
• Fig. 10 is a section corresponding to Fig. 8 in the open position of the binding, and
• 11 shows a section corresponding to FIG. 8 in the current state with the cross-country ski boot pivoted up.

The cross-country ski binding designated in its entirety by 1 according to FIGS. 1 to 3 is fastened to a cross-country ski 3 by means of screws 2. A cross-country ski boot is indicated by dash-dotted lines and labeled 4. It has a forward front sole end 5, which is designed as a downwardly open hook. The ski binding comprises a base plate 6 with raised side jaws 7, in which a crossmember 8 is mounted, which serves to interact with the hook-shaped sole end 5. On the crossmember, a U-shaped bracket is mounted with its legs 10, which, when a cross-country ski boot is inserted, encompasses its front end of the sole and secures it with its web 9 against lifting off the crossmember 8.

The bracket forms a crank arm to which a thrust member 13 is connected via an axle pin 12. This thrust member is supported by a cam 14 on the base plate 6, or rather on narrow strips of its side edges, which are formed by outlets of the side jaws 7. A coiled spiral spring 11 is attached to the journal 12, one leg 15 of which is supported on the web 9 of the bracket and the other leg 16 of which is supported on the thrust member 13. This thrust member also has a recess 17 on its upper side, which is used to insert the tip of the ski pole.

Fig. 1 shows the cross-country ski binding in its normal position. Under the influence of the spring 11, the bracket and the thrust member are held in the position shown. To insert a ski boot into the ski binding, pressure is to be exerted on the thrust member 13, for example by means of a ski pole tip in the direction of the arrow 18. As a result, the bracket is pivoted on the crossmember 8 with respect to the illustration in the counterclockwise direction, so that the ski binding assumes its position shown in FIG. 3. In this position, the front sole end 5 can be hooked onto the crossmember 8 when the sole position is approximately horizontal. When the thrust member 13 is subsequently relieved of pressure, the position according to FIG. 1 is then restored. Under the influence of the spring 11, the web 9 of the bracket clamps itself on the upper side of the forward sole end 5. During cross-country skiing, there is a constant change of position according to FIGS. 1 and 3, the cross member 8 forming a real pivot axis for the cross-country ski boot. To release the ski boot from the binding, when the ski boot is in the position according to FIG. 1, the bracket is again pivoted relative to the ski boot by exerting pressure on the thrust member 13, so that the sole end 5 thereof lifts off the crossbar 8 leaves. When the pressure is released, the ski binding then takes up its position again according to FIG. 1.

In the exemplary embodiment according to FIGS. 4 to 7, the cross-country ski binding is designated in its entirety by 21. It is attached to a cross-country ski 23 by means of screws 22. A cross-country ski boot indicated by dash-dotted lines is designated by 24. It has a forward front sole end 25 which is designed as a downwardly open hook.

The ski binding comprises a base plate 26 with raised side jaws 27, in which a cross member 28 is mounted. This serves to cooperate with the hook-shaped sole end 25. On the crossmember 30, a U-shaped bracket is mounted with its legs 30, which, when a cross-country ski boot is inserted, encompasses its front sole end and secures it with its web 29 against lifting off the crossmember 28.

As with the cross-country ski binding according to FIGS. 1 to 3, the bracket forms a crank arm, to which a thrust member 33 is connected via a journal 32. This thrust member is supported by a cam 34 on the base plate 26. A coiled spiral spring 31 is attached to the journal 32, one leg 35 of which is supported on the web 29 of the bracket and the other leg 36 of which is supported on the thrust member 33.

On the thrust member 33 a Riegethebet 40 is mounted on a pivot pin 44 which is parallel to the journal 32. A coiled spiral spring 43 is also attached to this pivot pin, one leg 45 of which is supported on the thrust member 33 and the other leg 46 of which is supported on the locking lever 40 and loads it clockwise with respect to the figures. The locking lever has a locking hook 41, which serves to interact with a barb 42 on the base plate 26. The locking lever also has a recess 47 on its upper side, which is used to insert the tip of the ski pole.

4 the cross-country ski binding according to the invention is shown in its normal position. The front sole end 25 is secured on the cross member 28 by the web 29 of the bracket. To transfer the ski binding into its open position, pressure is to be exerted on the locking lever 40, for example by means of a ski stick in the direction of the arrow shown. This results in a displacement of the thrust member 33 with respect to the illustration to the left while pivoting the bracket until the locking lever 40 can pivot counterclockwise and can engage behind the barb 42 on the base plate with its locking hook 41. The ski binding then takes off their position shown in Fig. 6. When the ski boot is on the ski, the web 29 is at a distance from the top of the front sole end 25, so that the ski boot can be hooked off from the cross member 28.

The spring 31, which is much stronger than the spring 43, ensures the open position.

Conversely as described above, the ski boot can be reinserted into the ski binding. After the front sole end 25 has been hooked onto the crossmember 28, the ski binding can be closed by swiveling the rear end of the ski boot up by also pivoting the bracket. This is because the locking hook 41 of the locking lever 40 is released from the barb 42 of the base plate 26, and the instantaneous state according to FIG. 7 is established.

In contrast to the embodiment according to FIGS. 1 to 3, this construction, once brought into its open position, retains it, so that the ski binding is readily ready for entry.

8 to 11 finally show an exemplary embodiment which is still simplified compared to that described above. In their entirety, the cross-country ski binding is designated 51. It is in turn fastened to a cross-country ski 53 by means of screws 52. A cross-country ski boot is again indicated by dash-dotted lines and designated 54. It has a forward sole end 55 which terminates in a bead-like downwardly extending hook.

As in the previously described exemplary embodiments, the binding comprises a base plate 56 with raised side jaws 57. A cross member 58 is mounted in these. On this a U-shaped bracket formed from a web 59 and two legs 60 is mounted, with the free ends of the legs. The web 59 is trough-shaped, so that it can accommodate the bead-like hook on the sole end 55, as can be seen from FIGS. 8 and 11.

A tongue 61 formed on the web has a hole into which one end of a tension spring 62 is suspended, the other end of which is suspended on an axis 63 which is mounted parallel to the cross member 58 in the side jaws 57. A locking lever 64 is mounted on this axis, which in the open position of the U-shaped bracket according to FIG. 10 can be pivoted into the movement path of its legs 60 in order to lock the bracket in the open position, and which in the sense of unlocking one Holding spring 65 is loaded, which is designed as a spiral spring and is attached to the axis 63 (see FIG. 9). On its upper side, the locking lever also has an indentation 66, which is used to insert a ski pole tip.

Fig. 8 shows the cross-country ski binding in its normal position. The forward sole end 55 engages with the bead-like downwardly extending hook in the trough-shaped web 59 of the strap. The front end of the sole is clamped between the web 59 and the cross member 58 and is thus held securely in the binding. During cross-country skiing there is a constant change of position according to FIGS. 8 and 11, the cross member 58 forming the pivot axis. The bracket is pivoted from the position according to FIG. 8 into that according to FIG. 11 against the progressively increasing resistance of the helical tension spring 62.

To move the ski binding from the normal position according to FIG. 8 into its open position, the locking lever 64 must be pressed down, for example by means of a ski stick, against the force of its retaining spring 65, that is to say pivoted clockwise about the axis 63 in relation to the illustration. Angled side parts 67 of the locking lever each run against one leg 60 of the bracket, so that it is pivoted from its position in FIG. 8 into that in FIG. 10 about the cross member 58. This pivoting causes the clamping connection of the sole end 55 to be released from the crossmember, so that the shoe can be removed from the binding by lifting the front sole end from the web 59.

The pivoting of the bracket takes place against the force of the helical tension spring 62, which is much stronger than the retaining spring 65 for the locking lever 64. This therefore retains its depressed position according to FIG. 10, since the retaining spring 65 is from. Clamping force exerted on the locking lever cannot be overcome. Once in this open position, the ski binding is ready to start again.

To connect the cross-country ski boot to the binding, refer to FIG. 10 to insert the sole end 55 into the strap. Then only the shoe is to be raised at the rear as shown in FIG. 11, as a result of which the front end of the sole is clamped under the crossmember 58. By the pivoting of the bracket of the locking lever 64 comes from this free and places itself under the influence of the retaining spring 65 in its upper limit position as shown in FIGS. ¹ 1 and 8 back.

Claims (10)

1. A cross-country ski binding for cross-country ski boots (4, 24, 54), having a forwardly extended front sole end (5, 25, 55) which is formed as a downwardly directed hook, with a transverse member (8, 28, 58) which is provided for cooperation with the end of the sole and which is mounted in side jaws (7, 27, 57) which extend upwardly from a base plate (6, 26, 56) which is to be fixedly mounted on the ski, characterised in that, for the purposes of pivotally mounting the front end (5, 25, 55) of the sole in the binding (1, 21,51) there is provided a U-shaped stirrup member (9, 10; 29, 30; 59, 60) whose limb portions (10, 30, 60) are mounted at their free ends on the transverse member (8, 28, 58) and whose web portion (9, 29, 59) extends parallel with respect to the transverse member, thereby forming a frame for accommodating the front end (5, 25, 55) of the sole, and that the stirrup member is subjected to the force of a spring (11, 31, 62) which loads it in the direction of clamping the front end (5, 25, 55) of the sole in position, th boot (4, 24, 54) being pivotable upwardly about the transverse member (8, 28, 58) against the resistance of the spring.

2. A cross-country ski binding according to claim 1, characterised in that the stirrup member (9, 10; 29, 30) is formed as a crank arm and is connected by way of a journal member (12,32) to a sliding member (13, 33) which is pivotable and longitudinally displaceable relative to the base plate (6, 26).

3. A cross-country ski binding according to claim 2, characterised in that the sliding member (13, 33) is loaded towards its inner limit position by the spring (11, 31 ) which acts on the stirrup member (9, 10; 29, 30).

4. A cross-country ski binding according to claim 2, characterised in that the sliding member (13, 33) bears with a projection (14, 34) on the base plate (6, 26) and is held in its inner limit position under the force of the spring (11,31) and that the spring (11, 31) is formed as a coil torsion spring and is mounted on the journal member (12, 32).

5. A cross-country ski binding according to one of claims 2 to 4, characterised in that provided on the sliding member (33) is a locking lever (40) which has a lock catch (41), that the base plate (26) has a catch portion (42) which is intended to co-operate with the lock catch (41 ) and that the locking lever (40) is loaded in the direction of unlocking by a holding spring (43).

6. A cross-country ski binding according to claim 5, characterised in that the locking lever (40) is pivotally connected to the sliding member (33) parallel to the journal member (32).

7. A cross-country ski binding according to claim 1, characterised in that the web portion (59) of the stirrup member (59, 60) is provided with a cradle which extends in the longitudinal direction of the ski for accommodating the end (55) of the sole and is disposed beneath the transverse member (58), thatthe stirrup member (59, 60) is pivotable into an open position in which the end (55) of the sole can be inserted into the cradle, and a locking position, and that provided for co-operating with the stirrup member (59,60) is a locking lever (64) which is mounted on a spindle (63) in parallel relationship to the transverse member (58) in the side jaws (57) and which can be pivoted into the path of pivotal movement of the stirrup member (59, 60) to lock same in the open position thereof and which is loaded in the direction of unlocking by a holding spring (65).

8. A cross-country ski binding according to claim 7, characterised in that the locking lever (64) has side portions (67) which respectively come to bear against a limb portion (60) of the stirrup member (59, 60) in the open position thereof.

9. A cross-country ski binding according to claim 7 or claim 8, characterised in that the spring for loading the stirrup member (59, 60) is formed as a coil tension spring (62) and is attached to the spindle (63) of the locking lever (64).

10. A cross-country ski binding according to one of claims 5 to 9, characterised in that the holding spring is formed as a coil torsion spring (43, 65) and is mounted on the spindle (44, 63) of the locking lever (40, 64).

Images