Toothed buckle fastening.

(42) Date of commencement of the patent: 15. 8.1993 (45) Date of issue: 25. 3.1994 (56) Documentation:

(73)

Patentee:

DE-0S2213972 AT-B 389430 AT-B 385639 CH-A5 668167

ATTREZZATURE MECCANISMI MINUTERIE SRL 1-31020 MOSNIGO DI MORIAGO DELLA BATTAGLIA (IT).

(54) CLOSURE FOR A SHOE (57) Shoe fastener, especially a sports shoe, with a bottom part (1), via which a sawtooth-like toothed belt (16) can be guided and on which a tensioning lever (4) is articulated pivotably about a pivoting axle (5), wherein in the clamping lever (4) a pawl piece (7) at a distance from the pivot axis (5) of the clamping lever (4) by means of a pivot axis (8) between the side walls (4) of the clamping lever (4) pivotally mounted and by means of a spring ( 9) is loaded in the direction of a stop (10) provided on the tensioning lever (4) in the region of the articulation axis (5), wherein the pawl piece (7) engages when opening the clamping lever in the region of an extension of the clamping lever (4) beyond its pivot axis (5) also on a steep flank of the toothed belt (16), to transport this.

AT 397 337

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AT397 337B

timing belt closure

The invention relates to a closure for a shoe, especially a sports shoe, with a bottom part, via which a sawtooth-type toothed belt can be guided and on which a tensioning lever is articulated pivotably about a pivot axis, wherein in the tensioning lever a pawl piece is mounted, which is resiliently supported on the tensioning lever and acts upon opening of the tensioning lever in the region of an imaginary extension of the tensioning lever beyond its pivot axis on a steep flank of the toothed belt, to transport this when opening the clamping lever, and at the bottom part further a spring-loaded, two-armed return spindles is pivotally hinged, which engages with a provided on an arm sperm nose on a steep flank of the toothed belt, wherein the locking lug against spring force can be brought out of engagement with the toothed belt by pressure on the other arm.

The object of the invention is to ensure a safe and easy closing and / or opening of the shoe under a variety of external influences, such as moisture, low temperatures or dirt. In addition, the shoe (usually for the purpose of sports) should be very tightly closed. This leads to large stresses on the closure member and has in known embodiments, a non-functioning and often damage the same and / or the toothed belt result.

A toothed belt closure according to the prior art is disclosed in EP-Al-400213 (SIDI), wherein in the clamping lever of the mechanism, a spring-displaceable, with the row of teeth engageable part is arranged, which is urged by the clamping lever elastically in the direction of the toothed belt ,

Another embodiment of such a closure is disclosed in EP-A2-387402 wherein the toothed belt has at least two rows of teeth, one of which cooperates mainly for tensioning the belt (closing the shoe) and the other with the braking means (for opening the closure) , In both embodiments, the clamping lever in its working area on a displaceable part, which represents the positive connection with the toothing of the toothed belt

US-A-3 662435 (ALLSOP) and DE-OS 2 213 972 of the same type describe two embodiments of a closure mechanism, γοη which has one in Figs. 1 to 6 (claim 5) and the second in Figs. 7 to 14 (claim 10) is shown. In the latter Ausfühnmgsform a bottom part is provided with side walls on which a lever is pivotally mounted, with which an arm provided with a pawl toothing is pivotally connected. Furthermore, a spring-loaded body element is provided on the base element as a backstop, which proves a holding toothing. The opening of the lever, which is provided with a pawl toothing, slides under spring load against the transport direction via the toothing of the lever toothed belt. The timing belt is not transported. In the fully open state of the closure, this pawl teeth is lifted by a cam from the teeth of the belt, after which the return spins can be solved. The transport of the toothed belt is accomplished by closing the lever.

Such a mechanism has a number of disadvantages. On the one hand, the frictional engagement of the pawl teeth in the timing belt for practical purposes (for example, iced timing belt) is not sufficiently ensured, on the other hand, due to the mechanical design of a compact design in which the necessary for practical purposes, especially for ski boots tensile forces are transmitted to the timing belt can, not possible. Another disadvantage of this device proves the mechanism for releasing the backstop, which is actuated upon complete opening of the clamping lever. This often leads to accidental release of this backstop especially with strong tensioning of the toothed belt.

Furthermore, by EP-Bl-259896 (Raichle) a toothed belt closure has become known, which contains a band-shaped, guided around a ski shoe holding element, at the end of notches are arranged, wherein the closure member by a pivotable clamping lever, in which an engaging in the row of teeth Slider is guided, which is returned in the return movement of the clamping lever by spring forces to its rest position, and is formed by a releasable backstop.

The object of the invention is to eliminate the disadvantages of known devices and to develop a usable for versatile applications, yet mechanically simple closure to develop. The invention together with further advantages will be explained in more detail below with reference to illustrative embodiments, which are illustrated in the drawings. In these, FIG. 1 a side view of a closure according to the invention with an open clamping lever, Fig. 2 a section through the device on the axis (YY ') with the clamping lever closed, Fig. 3 a top view of the closure according to another embodiment, Fig. 4 and FIG. 5 shows schematic examples of toothed belt fasteners on a shoe upper, FIG. 6 and 7 further examples of the attachment of the toothed belt to the shoe upper, cut along the central axis of the toothed belt, and 8th a schematic side view of a particular application form of the closure by means of pulleys and corresponding ropes on a ski boot.

According to Fig. 1 to 3, the closure has a bottom part (1) with two correspondingly shaped side walls (1 ') on which a two side cheeks (4) and a back part (4') existing clamping lever (4) along a pivot axis ( 5) is pivotally articulated by means of two rivets, which optionally as shown in Fig. 3 may have a recess (4 '), said bottom part (1) in the direction indicated by the arrow (B)

-2AT397337B

Transport direction before and / or after the pivot axis (5) has a projection (2) according to the invention, as shown in Figures 1 and 2, a gap between a toothed belt (16) and this bottom part (1) produce, and the bottom part ( 1) contains a bore (3) to this (ζ. B. by means of a rivet) on the shoe upper (23). The tensioning lever (4) can, in a further embodiment, which in FIG. 3 will be shown, in its back part (4 ') have a recess (4') and is formed in its closed position by means of on both side cheeks (4), Inwardly directed nubs (6) locked, engage in the last section of the closing movement of the clamping lever (4) in curved grooves (6 '), which are formed on both side walls (1 *) of the bottom part (1) and at the end of which are bores (6 "), in which the corresponding knobs (6) engage in the closed position of the clamping lever (4).

The tensioning lever (4) contains a two-armed pawl piece (7), which is articulated at a distance from the articulation axis (5) in the tensioning lever (4) between its side cheeks (4) about a pivot axis (8) and acts in a position which is controlled by a spring (9) which is arranged in a recessed seat on an arm (7 ') of the pawl piece (7) and between this arm and the inner surface of the back part (4') of the clamping lever (4) acts The pawl piece ( 7) is of the in Fig. 2 shown position up to a in the back part (4 *) of the clamping lever (4) formed stop (10), as shown in FIG. 1 can be seen, rotatable by a certain angle and by means of the second arm (7 ") on a steep flank (17) engage in the toothed belt (16). In the case of a further embodiment, which in FIG. 3 is shown and in which the back part (4 ') of the clamping lever (4) in the region of the spring (9) according to the invention a recess (4'), the spring (9) is then advantageously a helical spring about the pivot axis (8) of the pawl piece (7) and this formed either with a shortened arm (7 ') or one arm.

At the bottom part (1) by means of a pin (12) a two-armed backstop (11) is arranged, which acts on this bottom part by means of a spring (14), so that on the in the transport direction (B) located after the pin (12) located arm sperm (13), (13 ') of the backstop (11) are pressed onto the toothed belt (16), said spring being disposed on an axial seat of the backstop (11) and acting between the backstop (11) and one of the side walls (1 *) of the bottom part (1). By pressing on the second arm (15) against the spring force (14) of the backstop Spermasen (13), (13 ') of the corresponding teeth of the toothed belt (16) are separated.

Through the bottom part (1), between its base and the backstop (11), and between the two side cheeks (4) of the clamping lever (1), a toothed belt (16) is passed, the teeth each have a steep (17) and a flat (17 ') have flank, said toothed belt (16) at its end in the direction of the shoe upper (23) end, as shown in FIG. 4 to 8, different hooking means (18), (18 '), (19), (19'), (20), (20 '), (21), (21'), (22), (22 ') and its transport direction when closing the shoe in Figures 1 and 2 by the arrow (B) is indicated

The mode of action of the toothed belt closure according to the invention will be explained in more detail below with reference to FIGS. 1 to 3.

The belt (16) is inserted into the bottom part (1) between its base and the pawl piece (7) of the tensioning lever (4) until the toothed part of the belt (16) engages the toothed part (13), (13 ') of the belt Backstop (11) engages. When the tension lever (4) is pivoted in the direction of the arrow (A) about the pivot axis (5) from the closed position to the maximum open position, will with this movement, in which at the same time with the arm (7) in the toothed belt (16) engaging pawl piece (7) to touch the stop (10) about the pivot axis (8), the toothed belt (16) transported in the direction of the arrow (B) and thus transforms the pivotal movement of the clamping lever (4) and the pawl piece (7) in a linear translational movement of the toothed belt (16). The transmitted to this linear movement of the belt force overcomes the resistance of the spring (14) of the backstop (11), so that the passage of the toothed belt (16) with successive engagement of the toothed part (13), (13 ') of the backstop (11) successive toothed portions of the belt (16) is made possible.

Such pivoting movements of the clamping lever (4) are carried out until the shoe is firmly closed, being ensured by the construction according to the invention that during the sliding movement of the belt (16) at least one tooth per opening and closing of the clamping lever (4) is overcome. After the desired closing brings the clamping lever (4) in its fully closed position, in the mutually associated latching means (6), (6 '), (6) prevent accidental opening of the clamping lever (4) and the clamping lever (4) in this position covers the mechanism against ingress of foreign bodies. In a further, not shown embodiment, the clamping lever (4) in addition by means of a in the transport direction (B) behind the closure lying clamp, which is mounted longitudinally movable on the toothed belt (16) or fixed to the bottom part (1), in addition against accidental opening will be saved.

During the closing movement of the clamping lever (4), the pawl piece (7), on whose arm (7 ') the spring (9) is located, pushes this arm onto the backstop (11) and overcomes the resistance of the spring (9), so that, as shown in Fig. 2 can be seen, a rotation of the pawl piece (7) is effected by a certain angle. This rotation makes it possible, with the lever (4) closed, to achieve a remarkable reduction in the opening of the mechanism between the pawl piece (7) and the toothed part of the belt (16) in the direction of the arrow (B). This brings the great advantage that the

-3AT397337B

Probability of penetration of foreign bodies in the closing mechanism is significantly reduced.

To release or open the shutter to open the clamping lever (4) and presses the arm (15) of the backstop (11) towards the base of the bottom part (1), whereby the latched lugs (13), (13 *) of the lock (11 ) are separated from the teeth of the toothed belt (16) in the vicinity of the backstop. By opening the clamping lever (4), the clamping mechanism is slightly activated, that is, by engaging the pawl piece (7) in the toothed belt (16) a partial relief of the backstop (11) is achieved, thus facilitating the separation process of the corresponding teeth Dies means above all in view of the fact that the closure versatile and under various external conditions, such. B. Snow, dirt, moisture, cold is used, a significant advantage, because this avoids a possible damage under such conditions damaging the corresponding teeth, whereby the shutter a long life is guaranteed. In another embodiment, the clamping lever (4) a in Fig. 3 to have in this recess (4 '), which allows access to release the backstop (11) without opening the clamping lever (4) In such an embodiment, the pawl piece (7) one-arm in the direction of working area and the spring (9) as a spiral spring the axis (8) be formed, which again the effect of the invention is achieved.

In order to allow springing back of the pawl piece (7) engaging in the toothed belt (16) after each pivotal movement of the tensioning lever (4) into its original position before the clamping cycle and a better engagement of the arm (7) in the teeth of the toothed belt (16) in the transport direction (B) in front of and / or after the tension lever lying base part of the bottom part (1) is formed a projection (2), over which the toothed belt (16) slides, that between the bottom part (1) and the belt (16) has a gap for springing back the cam of the pawl piece by bending the toothed belt (16), as well as to ensure a positive engagement of the pawl arm (7 ") is produced in the toothed belt (16), without damaging the belt when operating the pawl piece (7). The jumping back of the pawl piece after the end of each clamping cycle is supported by the spring (9) or accelerated. By this mode of operation according to the invention as long as possible engagement distance of the pawl piece in the timing belt and thus a maximum transport path per clamping cycle is possible

The toothed belt (16) can, for example, be connected to the footwear as follows:

a) it can be mounted as shown in Figure 4 by means of a metal ring (18) directly on the edge of a shoe upper (23) on one or more hooks (18 ').

b) it can be hung as shown in Figure 5 by means of a metal hook directly on the edge of a shoe upper (23) in different slots (19 ').

d) it can, as shown in FIG. 6, have a pushbutton (20) at its end lying in the direction of the upper part of the shoe (23), which connects in a form-fitting manner to a corresponding counterpart (20 ') located on the upper part of the shoe;

e) it can, as can be seen in Fig. 7, at its end at the bottom of a mushroom-shaped pin (21) which has an enlarged cross-section at the lowermost end and thus in one or more on the shoe upper (23) attached counterparts ( 2Γ) locks;

f) it can, as schematically shown in Fig. 8 on a ski boot at one end of one or more pulleys (22) which cooperate with corresponding ropes or laces (22 '), whereby by such an embodiment particularly simple under or Translations can be realized.