WO2009026952A1

WO2009026952A1 - Ratchet clasp for a ski boot

Info

Publication number: WO2009026952A1
Application number: PCT/EP2007/010669
Authority: WO
Inventors: Hans Georg Martsch
Original assignee: Hans Georg Martsch
Priority date: 2007-08-24
Filing date: 2007-12-07
Publication date: 2009-03-05
Also published as: ATE530083T1; EP2120622A1; EP2120622B1; DE202007013582U1

Abstract

The invention relates to a ratchet clasp for fastening a boot (1), in particular a ski boot, comprising a rotatable drawing roller, a drawing strap (3) with a first strap end fastened to the boot (1) and a second, free strap end tensioned by the drawing roller (5), and also comprising a pivotable clamping lever (13) for turning the drawing roller (5) with a specific operating force in order to tension the drawing strap (3), characterized by a gear mechanism (13, 20) for transferring torque from the clamping lever (13) to the drawing roller (5) with a predetermined transmission ratio, whereby the operating force required is reduced. The ratchet clasp may also be used for fastening a snowboard binding.

Description

description

Ratchet buckle for a ski boot

The invention relates to a ratchet buckle for closing a shoe according to the preamble of the main claim, in particular for a ski boot.

For closing snowboard shoes, various ratchet buckles are known, which are described, for example, in DE 101 05 523 A1, DE 198 00 148 C2 and EP 1 221 291 A1. These known ratchet buckles have a plastic existing drawstring with a toothing, in which an external toothing of a draw roller engages, wherein the draw roller can be rotated by a clamping lever to tension the drawstring. The clamping lever and the tension roller are in this case integrally formed, so that a pivoting of the clamping lever by a predetermined angle to a corresponding rotation of the

Pull roller leads to the same angle.

A disadvantage of these known ratchet buckles is the fact that high tensile stresses can be realized in the drawstring only with a large operating force. The known ratchet buckles described above are therefore only suitable for snowboard bindings in which no great tensile stresses are required to close the snowboard binding. For ski boots, however, much greater tension is required to close the boot to achieve a tight fit.

For closing ski boots therefore fasteners are used, as described for example in EP 0 657 117 Al, EP 1 205 122 A2, EP 1 279 345 A1 or EP 0 140 874 A1. These tension locks also a clamping lever is provided, which, however, does not tension a tension band, but a pre-set tension member. The tension is thus pre-adjusted before the actual closing process by an adjustment of the tension member and can then no longer be adjusted in the actual closing operation.

The invention is therefore an object of the invention to provide a ratchet buckle, which is also well suited for closing ski boots.

This object is achieved by a ratchet buckle according to the invention according to the main claim.

The invention is based on the technical knowledge that the above-described conventional ratchet buckles are therefore not well suited for ski boots, because the Spannhe- and the tension roller are integrally formed. This has the consequence that a rotation of the clamping lever by a predetermined angle to a corresponding rotation of the draw roller leads by the same angle, so that the torque transmission from the clamping lever on the draw roller and thus on the drawstring is done without a translation, resulting in a large operating force required.

The invention therefore encompasses the general technical teaching of connecting the tension lever to the tension roller via a gear, the gearbox having a predetermined gear ratio, as a result of which the required operating force for actuating the tensioning lever is reduced. The use of a transmission between the tensioning lever and the draw roller offers the advantage that the large tensile stresses required when closing ski boots can be realized with a relatively small operating force for actuating the tensioning lever.

In a preferred embodiment of the invention, the transmission between the tensioning lever and the tensioning roller has at least one gear which is secured against rotation with the tensioning roller and in which the tensioning lever engages in order to rotate the tensioning roller. It is important that the gear has a larger diameter than the draw roller to achieve the desired gear ratio.

Preferably, in each case a gear is mounted on both end sides of the draw roller, so that the clamping lever engages on both sides in the two gears to rotate the draw roller.

With respect to the transmission ratio of the transmission between the tension lever and the tension roller, the invention is not limited to specific values. Preferably, however, the transmission ratio is greater than 1.5, 2 or 3. This means that the torque applied by the operator to the tensioning lever is correspondingly smaller than the torque acting on the tensioning roller.

In contrast to the conventional ratchet buckles for snowboard bindings described above, the tensioning lever and the tensioning roller in the ratchet buckle according to the invention are preferably designed as separate components, which allows the intermediate gear of the transmission. It should also be mentioned that in the case of the above-described known ratchet buckles for snowboard bindings, the tension roller is displaceable within the ratchet buckle in order to enable the tension roller to be turned back after a tensioning movement by the tension roller being briefly lifted off the tension band. In contrast, in the ratchet buckle according to the invention, the draw roller preferably has an axis of rotation which is stationary within the ratchet buckle. This is possible because the clamping lever and the tension roller are formed as separate components and thus can be mechanically decoupled.

Another difference between the ratchet buckle according to the invention and the ratchet buckles for snowboard bindings described at the outset is that the ratchet buckle according to the invention has a ratchet which mechanically connects the tensioning lever to the tensioning roller, the ratchet engaging the tensioning roller or the associated toothed wheels only in a pivoting direction of the clamping lever entrains and otherwise mechanically decoupled the clamping lever of tension roller or the associated gears. In contrast, the tensioning lever and the tension roller in the known ratchet buckles for snowboard bindings described above are integrally formed as a component and therefore can not be decoupled from each other, so that the ratchet function must be implemented in the conventional ratchet buckles described above in a different way.

In addition, the ratchet buckle according to the invention preferably has a releasable locking mechanism which selectively couples the tensioning lever with the tension roller or the gears connected thereto or decouples from the tension roller or the gears. The locking or unlocking of the locking mechanism can in this case, for example by Operating elements (eg buttons or push buttons) take place, which can be attached to the tensioning lever, for example.

Furthermore, the ratchet buckle according to the invention preferably has a releasable pawl which prevents the tension band from slipping out of the ratchet buckle in the tensioned state.

In a variant of the invention, the pawl engages in the draw roller or the gears and thereby locks them, wherein the draw roller in turn fixes the drawstring. In this variant, the pawl thus acts indirectly via the gears or the tension roller on the tension band.

In another variant of the invention, however, the pawl engages directly into the tension band and thereby prevents slipping out of the tension band in the tensioned state.

In the tensioned state, the tensioning lever can preferably be folded against the shoe to prevent the user from being disturbed by a protruding tensioning lever. It is possible that the clamping lever automatically locks the pawl in the folded state, thereby preventing release of the pawl. For this purpose, for example, be arranged in the clamping lever, a recess which receives the pawl or an associated actuating element in the folded state and thereby blocked.

In a variant of the invention, the tension roller on its lateral surface on an external toothing, in which engages a corresponding toothing of the tension band. The coupling between the draw roller and the drawstring can thus be done positively. In another variant of the invention, however, the tension band is wound onto the tension roller, so that the tension roller in this variant preferably has a smooth lateral surface. The drawstring is then preferably bendable to allow winding onto the draw roll.

It should also be mentioned that the term tension band used in the context of the invention is to be understood generally and is not restricted to bands in the narrower sense, in which the width is substantially greater than the thickness. Rather, the drawstring can also be a rope, a wire or the like.

Finally, the invention is not limited to a ratchet buckle as a single component, but also includes a shoe with such a ratchet buckle according to the invention, for example, a ski boot, a snowboard boot, a snowboard binding, a skate, a roller skate or a mountain boot can act. However, with regard to the field of application of the ratchet buckle according to the invention, the invention is not limited to the shoe types mentioned above, but in principle also applicable to other shoe types.

Other advantageous developments of the invention are characterized in the subclaims or are explained in more detail below together with the description of the preferred embodiments with reference to FIGS. Show it:

FIG. 1 shows a plan view of a ratchet buckle according to the invention,

FIG. 2 shows a side view of the ratchet buckle of FIG. 1, FIG. 3 is a front view of the ratchet buckle of FIGS. 1 and 2;

FIG. 4 shows a detailed view of the draw roller of the ratchet buckle illustrated in FIGS. 1 to 3,

FIG. 5 shows a detailed side view of the draw roller of FIGS. 1 to 4,

FIG. 6 shows a detailed view of a modification of the draw roller,

7 shows a plan view of a tension lever for the ratchet buckle from the preceding figures,

8 shows a bottom view of the tensioning lever according to FIG. 7, FIG.

FIG. 9 shows a side view of the tensioning lever from FIGS. 7 and 8,

FIG. 10 shows an end view of an axle shaft of the ratchet buckle from the preceding figures,

FIG. 11 shows a plan view of the axle shaft according to FIG. 10,

FIG. 12 shows a plan view of the axle shaft according to FIGS. 10 and 11 with parts mounted thereon,

FIG. 13 shows a side view of a sprocket wheel for the ratchet buckle from the preceding figures,

FIG. 14 shows the ratchet buckle with the mounted toothed wheels for transmitting power from the tensioning lever to the tensioning roller; FIG. 15 shows an end view of the gear in the decoupled state,

FIG. 16 is a bottom view of the ratchet buckle,

17 is a front view of the ratchet buckle in the assembled state,

FIG. 18 shows a plan view of the drawstring,

19 shows a side view of the mounted ratchet buckle on a ski boot,

Figure 20 is a detailed side view of the ratchet buckle with folded clamping lever and

Figure 21 is a side view of the invention ratchet buckle with folded clamping lever.

The drawings show a ratchet buckle according to the invention for closing a ski boot 1, as can be seen for example from FIG.

The ratchet buckle has a ratchet holder 2 which is fastened to one of the two parts of the ski boot 1 to be connected to one another, wherein the tensioning of the two parts of the ski boot 1 is effected by a drawstring 3, as will be explained in detail.

The attachment of the ratchet holder 2 to the ski boot 1 takes place on the one hand via a front anchoring 4a, which is inserted into a groove 4b in the ski boot 1, as can be seen in particular from FIG. On the other hand, the ratchet holder 2 is fastened to the ski boot 1 by a rivet 4c in the rear region of the ratchet holder 2, as can be seen in particular from FIGS. 1, 14, 20 and 21.

In addition, a rivet rod 4d is still provided, which serves for fastening the drawstring 3 to the opposite part of the ski boot 1, as will be described in detail.

For tensioning the drawstring 3, the ratchet buckle according to the invention has a draw roller 5, which has at its two ends in each case a non-toothed region 5a and on its inside four projecting springs 5b, wherein the springs 5b are axially aligned and engage in corresponding grooves 6a, as well will be described in detail.

Between the two outer non-toothed areas 5a, the tension roller 5 has a toothing on its outer circumferential surface

5c, which engages in a corresponding toothing of the drawstring 3 in order to tension the drawstring.

Furthermore, the ratchet buckle according to the invention has an axle shaft 6, which in the mounted state carries the tension roller 5, wherein the springs 5b of the tension roller 5 engage in corresponding grooves 6a in the outer lateral surface of the axle shaft 6, so that the tongue and groove connection between the springs 5b and the grooves 6a causes a rotationally secure connection between the draw roller 5 and the axle shaft 6.

At one end, the axle shaft 6 is secured by a cotter pin 7 or a similar securing element, as can be seen in particular from FIG. Furthermore, the ratchet buckle on two tension springs 8, 9, wherein the tension spring 8 presses a pawl 10 against the external teeth 20a of the gears 20. This prevents that the tension roller 5 can rotate freely after clamping, which would lead to a release of the tension band 3 and thus to a solution of the connection.

In addition, a tensioning device 11 is provided, which also presses against the external teeth 20a of the gears 20, which rotates about the axle shaft 6, the tension roller 5 and thereby tensioning the tension band 3, as will be described in detail.

The tensioning device 11 can in this case be unlocked by an unlocking device 12, wherein the unlocking device 12 can be actuated with a handle 12a, which is guided in a guide slot 12b. An actuation of the handle 12a has the consequence that the tensioning device 11 does not rotate the tension roller 5 via the toothed wheels 20, so that the tension band 3 is also not tensioned.

For tensioning the drawstring 3, the ratchet buckle according to the invention on a tensioning lever 13 which is pivotable about the axle shaft 6, wherein Figure 20 shows the tensioning lever 13 in a folded state when the ski boot 1 is closed, whereas Figure 21, the tensioning lever 13 in a folded down State shows.

Furthermore, the ratchet buckle has a slip-back barrier 14 which can be actuated by a handle 14a and is intended to prevent it from slipping back, as will be described in detail below. Moreover, the ratchet buckle in the tension lever 13 has an axle passage 15 (see Fig. 9) which is fitted onto the axle shaft 6.

Furthermore, the ratchet buckle on a tensioning device 16 which can be unlocked by an unlocking 17, wherein the release comprises a tension spring system 17a.

In the mounted state, one or more washers 19 and two toothed wheels 20 are located on both sides of the draw roller 5 on the axle shaft 6 between the cotter pin 7 and an axle head 18, the two toothed wheels 20 having an external toothing 20a. In addition, the two gears 20 at its bore inside axially extending springs 21 which engage in the assembled state in the grooves 6 a of the axle shaft 6, so that the two gears 20 by a tongue and groove connection between the grooves 6 a and Springs 21 are connected against rotation.

It has already been mentioned above that the drawstring 3 is connected to a part of the ski boot 1. The connection takes place here by means of a buckle strap 22 (see Fig. 18, 19), which can be used in the buckle hook 23, wherein the buckle hook 23 has two different hook positions 23a, 23b.

The buckle hook 23 is attached via a buckle 24 on the other part of the ski boot 1.

It should also be mentioned that the drawstring 3 has a toothed region 25 and a smooth, non-toothed region 26. The operation of the ratchet buckle according to the invention described above will now be explained below.

For closing the ski boot 1, first the buckle clip 24 is suspended in one of the hook positions 23a, 23b of the buckle hook 23.

Subsequently, the tensioning lever 13 is folded down, i. in Figure 19 in a clockwise direction. In this case, the clamping device 11 engages in the external toothing 20a of the two gears 20, as can be seen, for example, from FIG. The tensioning lever 13 thus takes on the folding of the ski boot 1 with the two gears 20, wherein the two gears 20 in turn turn the tension roller 5, so that the tension roller 5 rotates in the Dar position according to Figure 2 in a clockwise direction and thereby the tension band. 3 tense.

When folding back the clamping lever 13 in the folded state shown in Figure 20, the clamping device 11 slides against the outer teeth 20a of the two gears 20, so that the two gears 20 are not moved back again.

Subsequently, the tensioning lever 13 can then be folded back, wherein the tension band 3 is then stretched further.

In this way, the desired tension of the tension band 3 can be adjusted.

It should also be mentioned that the tensioning lever 13 has a recess 10a (see FIG. 9) which, in the folded-on state according to FIG. 20, receives the locking pawl 10 and thereby locks it. In this locked state, the pawl 10 again locks the two gears 20, as shown in FIG. It is important in the ratchet buckle according to the invention that the tensioning lever 13, together with the two gearwheels 20 and the tensioning roller 5, form a transmission which effects a transmission ratio, which reduces the required operating force. This is achieved in that the two gears 20 have a larger diameter than the teeth 5c of the draw roller. 5

Therefore, the ratchet buckle according to the invention has the advantage that can be achieved with a relatively low operating force for the operation of the tensioning lever 13, a sufficiently large tension in the drawstring 3 to safely lock ski boots 1 can.

The invention is not limited to the preferred embodiment described above. Rather, a variety of variants and modifications is possible, which also make use of the inventive idea and therefore fall within the scope.

List of reference numbers:

1 ski boot

2 ratchet holders

3 drawstring

4a anchoring

4b groove

4c rivet

4d rivet bar

5 draw roller

5a untoothed area

5b feathers

5c toothing

6 axle shaft 6a grooves

7 sapwood

8 tension spring

9 tension spring

10 pawl 10a recess

11 clamping device

12 Entriegler

12a handle for Entriegler

12b guide slot

13 tension lever

14 Backrest lock 14a Handle

15 axis passage

16 clamping device

17 Release 17a Tension spring system

18 axis head

19 Washer 20 gears 20a external toothing

21 springs

22 buckles

23 buckle hook 23a hook position 23b hook position

24 buckle

25 Toothed area of the drawstring

26 non-toothed area of the drawstring * * * * *

Claims

1. A ratchet buckle for closing a shoe (1), in particular a ski boot, with a) a rotatable tension roller (5), b) a tension band (3) with a first band end attached to the shoe (1) and a tension band (5) ) tensioned free second end of the band, and with c) a pivotable tensioning lever (13) for rotating the tension roller (5) with a certain operating force to tension the tension band (3), characterized by d) a transmission (13, 20, 6, 5) for transmitting torque from the clamping lever (13) to the draw roller (5) with a predetermined transmission ratio, whereby the required operating force is reduced.

2. ratchet buckle according to claim 1, characterized in that a) that the gear at least one gear (20) which is connected against rotation with the tension roller (5), b) that the clamping lever (13) engages in the gear (20), to turn the tension roller (5), in particular via a

Axle shaft (6), and c) that the gear (20) has a larger diameter than the draw roller (5) in order to achieve the transmission ratio.

3. ratchet buckle according to one of the preceding claims, characterized in that the transmission ratio of the transmission is greater than 1.5, 2 or 3.

4. ratchet buckle according to one of the preceding claims, characterized in that the clamping lever (13) and the tension roller (5) are separate components.

5. ratchet buckle according to one of the preceding claims, characterized thereby, that the draw roller (5) has a rotation axis (6) which is stationary within the ratchet buckle.

6. ratchet buckle according to any one of the preceding claims, characterized by a ratchet which mechanically connects the tensioning lever (13) with the tension roller (5), wherein the ratchet entrains the tension roller (5) only in a pivoting direction of the tensioning lever (13) and otherwise the Tension lever (13) from the draw roller (5) decoupled.

7. ratchet buckle according to claim 6, characterized in that the ratchet a releasable locking mechanism

(10) which selectively couples the tensioning lever (13) to the tension roller (5) or decouples it from the tension roller (5).

8. ratchet buckle according to one of the preceding claims, characterized by a releasable pawl (10) which prevents turning back of the tension roller (5).

9. ratchet buckle claim 8, characterized in that a) that the clamping lever (13) after closing the shoe (1) on the shoe (1) can be folded, b) that the clamping lever (13) in the folded state automatically the Locking pawl (10) locked and thereby a

Release the pawl (10) prevented.

10. ratchet buckle according to one of the preceding claims, characterized in that a) that the tension roller (5) on its lateral surface has an external toothing (5c), and b) that the tension band (3) has a toothing (25) which is connected to the external toothing (5c) of the tension roller (5) is adapted and in the outer toothing (5c) of the tension roller (5) engages.

11. ratchet buckle according to one of the preceding claims, characterized in that the drawstring (3) is wound on the draw roller (5).

12. shoe (1), characterized by a ratchet buckle according to one of the preceding claims for closing the

Shoe (1).

13. Shoe (1) according to claim 12, characterized in that the shoe (1) is one of the following shoe types: a) ski boot, b) snowboard boot, c) ice skate, d) roller skate, e) mountain boot , in particular crampon-resistant mountain boots.

14. Snow board binding, characterized by a ratchet buckle according to one of the preceding claims 1 to 11 for closing the snowboard binding. * * * * *