ITTV940138A1 - CLAMPING DEVICE, ESPECIALLY FOR SPORTS FOOTWEAR. - Google Patents

Abstract

The present application relates to a clamping device, particularly usable for sports shoes, which comprise a fastening element integral with a first flap and a traction element interacting with the fastening element, as well as a lever arm at a first end transversely pivoted idle between the shoulders of a base fixed to the second flap to be joined. In this device the lever arm controls the opening and closing operations with a rotation impressed on it in the same direction. This allows easier closing and opening operations with a simplification of the opening-closing operating sequence, having a lever arm which is free from stress once the closure has taken place.

Description

DESCRIPTION

The present application relates to a tightening device, particularly for sports shoes and in particular for ski boots or skates.

Many types of levers used in ski boots are known today; for this purpose he presented a patent on 17.07.1975, granted with N.

1039897, in which a lever is illustrated which is constituted by an arm at one end pivoted, by means of a suitable pin, to a pair of shoulders which are integral with a flap of the boot; the arm has a toothed area for interaction with the end of a hook, at the other end associable with the other flap to be closed again of the boot.

Said known lever requires good aesthetic quality surface finishes, resulting in the same visible on the boot; this therefore requires the use of materials such as aluminum or plastic which have a valuable exterior appearance for the skier but at the same time do not possess high resistance characteristics, necessary for the levers in order to withstand the stresses and impacts to which they are subjected during the sports practice.

In any case, the protrusion of the levers with respect to the lateral surface of the boot does not give the latter a clean aesthetic appearance since they are subject, in the event of a collision with the snowpack or with the slalom pole or with the other boot, accidental opening or breakage.

The lever is also subject, once closed, to loads, which increases the possibility of breakage.

A partial solution to these drawbacks

presented on 21.01.1976 a patent granted with No. 1054289 in which a closing unit for ski shoes was illustrated which, although using a simplified structure, was found to be not easy to close, given the scarce support surface for the hand on which to exert the effort to achieve closure.

The Italian patent no. No. 1,082,434 in which a lever device for closing one se is illustrated

ski, which includes a toothed band, integral

flap of the upper, and a lever, integral with the other flap of the

io and equipped with an advance ratchet which co

with the toothed band in the direction of causing closure

boot.

This solution essentially allows to increase the degree of tensioning of the toothed band while maintaining the previously achieved degree of tightening, but at the same time has other drawbacks essentially due to its structural complexity and to the difficulty of operation as it is necessary to position the terminal end of the lever, indicated with the number 7 and which is pivoted at the end of the lever indicated with the number 6, in correspondence with the present interspace

between two adjacent teeth of the band in such a way that there is no jamming during the closing phase of the lever indicated with number 6; to overcome this drawback it is necessary to carry out many movements with very limited recoveries.

The terminal end of the lever indicated with the number 7, moreover, has a central drain defining a pair of lateral appendages, the latter, and only these, interacting with the teeth of the underlying band: this conformation, necessary in order not to interact with the indicated lever with number 10, it creates further drawbacks due to the possibility of a deformation of these appendages with consequent impossibility of obtaining the adjustment of the closure.

In any case, the lever indicated with the number 6 is in any case protruding in height with respect to the band and therefore to the edge of the upper; furthermore, the possible formation of ice or the deposition of snow in correspondence with the lever indicated with the number 10 can lead, in the event of accidental impacts, to the disengagement of the same with respect to the toothed band, thus leading to the opening of the device.

An Italian patent for Utility Model No.

185645 filed on 20.01.1981 illustrating a lever closure, in particular for motorcycle boots, in which the lever arm, at one end still pivoted in correspondence with a predisposed support bound to a flap, is inserted into predisposed notches obtained on another flap to close.

Even this solution, even though it has a limited number of components, has some drawbacks such as the direct interaction of the lever arm with the flap to be reclosed which involves breakages or deformations due to the different resistance of the materials in contact with each other.

A French patent published with No. 2432280 and filed on 03.08.1978 is also known in which a closing device is illustrated, again composed of a lever arm, shaped like a "U", the wings of which are still pivoted at the ends in correspondence of a prearranged support constrained to a flap, between said wings a pin interacting with a prearranged rack obtained and protruding from the other flap to be joined is interposed.

This solution has drawbacks since the coupling between the lever arm and the rack is not always reliable since the rack must necessarily be made of plastic material together with the flap of the boot and therefore made of material that does not withstand the high stresses exerted during skiing.

In fact, among the various situations illustrated, the same applicant referred to in the aforementioned French patent provides for the use of a single lever arm having a toothed area interacting with a prearranged pin associated transversely to the wings of a "U" -shaped bar, at one end pivoted as a flag to the other flap to be joined.

Also this solution therefore has the previously mentioned drawbacks to which a difficult closing maneuver is added by the skier who has to make the lever arm practically rotate 180 °.

A partial solution to this drawback

submitted an application N .. 22716 B / 80 on 08.09.1980 relating to a closing device particularly for ski boots, in which there is a lever arm hinged, at one end, in correspondence with one of the flaps to be tightened , with a median portion of this lever element articulating the end of a tie rod provided on the opposite side with a hook element that can be coupled into a coupling seat provided in correspondence with the other flap to be tightened, said tie rod having means for adjusting its useful length and at least a substantially flexible portion.

However, this solution too is constructively comprised of a large number of components, which protrudes beyond the shape of the boot; the closure device also has a considerable elongation on its longitudinal axis, which affects a very large area of the boot.

As a partial solution to these drawbacks, the same applicant submitted on 07.11.1990 an application No. 40143 A / 90 which illustrates a lever structure for sports shoes, particularly for tightening two flaps of a ski boot, the peculiarity of which consists in the fact of comprising a lever arm associated or associable, totally or partially, in correspondence with at least one suitable seat obtained on one of said flaps on the other of said flaps, at least one gripping element being associated for coupling means present on said lever arm.

Although this illustrated solution is undoubtedly valid, it also has drawbacks since the interconnection between the lever arm and the seat obtained on the flaps has been found to be not optimal.

In the reported known art, therefore, the various disadvantages have been found that of having levers which are subject to loads once the tightening and therefore the closing of the lever itself, as well as levers which have large overall dimensions, especially in height, as well as levers that have a non-optimal ergonomics of use.

The main task of what forms the subject of the present application is therefore to solve the technical problems highlighted by eliminating the drawbacks mentioned above in the known art and then by devising a tightening device which can be optimally associated with the flaps of a sports shoe, such as a boot or a shoe, and which has a simple operating sequence of activation and deactivation,

Within the scope of the above aim, another object is to obtain a device which reduces the load to be applied to the lever arm, in particular during the release operation.

Another important object is to provide an invention which, while comprising a lever arm that can be operated by the user, allows it to be preserved from stresses due to the loads necessary to keep the flaps of the shoe tight, and therefore to reduce the risk of possible breakages due to loads. applied for the entire duration of use of the boot on the feet.

Another object is to provide a device which allows to ensure an optimal adjustment of the tightening between the two flaps to be joined while at the same time having a very limited overall height, with respect to the external shape of the shoe.

Another object is to provide a device which allows the flaps to be released quickly and easily.

Another object is to provide an invention which is not subject to accidental openings due to pressures or impacts impressed thereon.

Not least object is to provide an invention which is reliable and safe in use.

The above mentioned aim and objects as well as others which will appear more clearly below, are achieved by a tightening device, particularly for sports shoes comprising an attachment element, integral with a first flap and with which a traction element operatively connected to a lever arm at a first end transversely pivoted idle between the shoulders of a base fixed to a second flap which falls due to the fact that said lever arm controls the opening and closing operations of said device with a rotation imparted thereto in the same sense.

Further characteristics and advantages of the invention will become clearer from the detailed description of two particular, but not exclusive, embodiments, illustrated by way of non-limiting example in the attached drawings in which:

fig. 1 shows the device in a partially sectioned side view in which the device is closed with the lever arm at rest;

fig. 2 illustrates in a view similar to the previous one, the positioning of the lever arm with a rotation impressed on it that brings the device to the starting point of the release stroke between the traction element and the coupling element;

fig. 3 shows, in a view similar to the previous one, the position of the lever arm in which the release phase begins; fig. 4 illustrates, in a three-quarter side view, the condition of the previous figure;

fig. 5 shows, in a view similar to that of Figure 3, an intermediate release position;

fig. 6 shows, in a view similar to the previous one, the final release position;

fig. 7 illustrates, in a view similar to the previous one, the initial position of the lever arm to achieve the coupling between the traction element and the coupling element;

fig. 8 illustrates, in a three-quarter side view in which the cover element has been omitted for clarity, the device in the condition referred to in the previous figure;

fig. 9 illustrates, in a view similar to that of Figure 7, the position of maximum effort in the coupling phase;

fig. 10 illustrates, in a view similar to the previous one, the final coupling position;

fig. 11 shows, in an exploded view, the components of the device;

fig. 12 shows the invention in a top view; fig. 13 illustrates, in a three-quarter side view, a further embodiment in the condition of Figure 1;

fig. 14 shows, in a view similar to the previous one, the invention in the starting position of the release step;

fig. 15 illustrates, in a view similar to the previous one, the condition during the release phase of the device;

fig. 16 illustrates, in a view similar to that of Figure 13, the device in the open condition with the lever arm in the rest condition;

fig. 17 illustrates, in a partially sectioned view along a longitudinal axis, the device in the condition of Figure 14;

fig. 18 shows, in a view similar to the previous one, the device in the condition of Figure 15;

Figure 19 illustrates, in a view similar to that of Figure 15, the initial position phase of the lever arm to achieve the coupling between the traction element and the coupling element;

fig. 20 illustrates, in a view similar to the previous one, the final phase of the coupling which leads to the closure of the device;

fig. 21, similar to Figure 13, illustrates the device in the closed condition with the lever arm at rest.

With reference to the aforementioned figures, the number 1 indicates the tightening device particularly usable for a sports shoe, such as, for example, a ski boot, a roller or ice skate.

This device consists of an attachment element 2, such as a rack or one or more teeth integral with a first flap 3 of the shoe.

The clamping device is also constituted by a traction element 4, preferably constituted by a pawl at one end of which, adjacent to the base, there is a first transverse pin 5 interacting with the hooking element 2 and to whose other end can be associated , by means of a second pin 6, an interconnection element 7 at the other end which in turn can be associated, by means of a suitable third pin 8, at the free ends of a tie rod 9.

The clamping device 1 also comprises a lever arm 10 having at a first end 11 a pair of first wings 12a, 12b, between which a first pair of holes 13a are obtained transversely respectively, starting from the free end, 13b, a second pair of holes 14a, 14b and a third pair of holes 15a, 15b.

The lever arm 10 is transversely pivoted idle. by means of a fourth pin 16, between a pair of first shoulders 17a 17b protruding from a base 18 attached to the second flap 19 of the sports shoe, said fourth pin 16 passing in correspondence with the first pair of holes 13a, 13b,

In correspondence with the same fourth pin 16, between the first wings 12a, 12b of the lever arm 10, there is a tensioning actuator 20 consisting of a body that can be housed between the second wings 21a, 21b of the tie rod 9 so as to have an essentially parallelepiped shape with at the ends a fourth hole 22 housing for the fourth pin 16 and a fifth hole 23 housing for a fifth pin 24 for the fulcrum of said tensioning actuator 20 itself in correspondence with a sixth pair of holes 25a, 25b obtained in correspondence with the base 26 of tie rod 9.

The tensioning actuator 20 has a through axial seat 27 for a tension release element consisting of a cam 28 rotatably associated at the lower surface 29 of the tensioning actuator 20 facing the base 18.

The rotatable coupling between the cam 28 and the tensioning actuator 20 can take place thanks to the presence at the lower surface 29 of the latter of suitable housings 30a, 30b for predisposed sixth pins 31 projecting laterally to the cam 28.

The latter presents, in a side view, schematically an S-shaped conformation to define a first tooth 32 able to abut at the overlying base 26 of the tie rod 9 and a second tooth 33 interacting with a release actuator 34 consisting of a lever on the the other end pivoted between the first wings 12a, 12b of the lever arm 10 in correspondence with the second pair of holes 14a, 14b by means of a seventh pin 35.

The release actuator 34 can therefore pivot with respect to the lever arm 10, its terminal end 36 interacting with the facing arcuate surface of the second tooth 33.

This release actuator 34 is therefore above the underlying end of the tensioning actuator 20 on which the fourth hole 22 is obtained, this release actuator 34 resting on said end in the closed condition illustrated in figure 1.

The release actuator 34 also interacts with an elastically deformable element 37 consisting of a suitable spring which, at the ends rotatably associated with the seventh pin 35, works in contrast with the release actuator 34 in the direction of forcing it in the direction of the underlying end of the 'tensioning actuator 20.

The clamping device is also constituted by a covering element 38 which is constituted by a plate at one end having a seventh hole 39 seat for an eighth pivot pin 40 of the same between the first wings 12a, 12b of the lever arm 10 in correspondence of the third pair of holes 15a, 15b.

The first wings 12a, 12h of the lever arm 10 can also be placed against a facing pair of second lateral shoulders 41a and 41b obtained on the tensioning actuator 20 at the pivot end of the fourth pin 16.

The use of the device is as follows: starting from figure 1, which shows the device in the clamped and therefore closed condition, the traction element 4 is engaged with the hooking element 2 .

In the condition illustrated in Figure 1, therefore, the axis of the fifth pin 24, which pivots the tensioning actuator 20 to the tie rod 9, is positioned, with respect to the base 18, at a lower height from it than the axis of the fourth. pivot pin 16 of the tensioning actuator 20 to the lever arm 10.

This arrangement allows stable equilibrium when closing the device, thus resulting in the lever arm 10 unloaded from any stresses.

To obtain the opening of the device, the user will grip the free end of the lever arm 10 by carrying out a first lifting, as illustrated in figure 2 in which the effort applied by the lever arm 10 is practically zero, with the exception of the weight of the lever arm. and any elastically deformable elements possibly provided to keep the lever arm in a lowered position.

Starting from the position illustrated in Figure 2, the free end of the release actuator 34 begins to interact with the tooth 33 of the cam 28, forcing the latter to rotate in the same direction around its sixth pins 31.

The further rotation imposed on the lever arm, as illustrated in figure 3, involves, through the release actuator 34, the further rotation of the cam 28 which in turn forces the lifting, with respect to the base 18, of the tensioning actuator 20 until the detensioning of the traction element 4 and therefore, in substance, of the tightening is achieved.

Once the traction element 4 has been de-tensioned, the lever arm 10 can be rotated in the opposite direction to the previous one, and therefore clockwise: this rotation, however, is passive in the sense that it does not affect either the closing phase or the opening phase. of the device.

The clockwise rotation of the lever arm 10 therefore has the sole function of repositioning the lever arm itself close to the first flap 3.

At the same time, the release of the tension imposed on the traction element 4 allows, also thanks to the pressure that can be operated through the foot of the user, the disengagement of the first pin 5 from the coupling element 2, as illustrated for example in Figure 6.

The latter therefore illustrates the static open position of the device.

As regards the closing phase, and therefore the dynamic phase of the start of the active coupling stroke, it is necessary, starting from the condition of figure 6, to impose an anti-clockwise rotation on the lever arm 10 until the traction element is dragged. 4 so that the first pin 5 interacts with the hooking element 2, as illustrated in figure 7.

In this way, the first wings 12a, 12b of the lever arm 10, leaning against the facing pair of second lateral shoulders 41a and 41b of the tensioning actuator 20, push the latter, until it is in a stable closed condition, illustrated in the figure 10, in which, like Figure 1, the axis of the fifth pin 24 of the tensioning actuator 20 is positioned, with respect to the base 18, at a lower height than the axis of the fourth pivot pin 16 of the actuator 20 to the lever arm 10.

In this phase both the release actuator 34 and the cam 28 are inactive in the sense that a rotation is imposed on the cam which leads it to reposition itself within the through axial seat 27 of the tensioning actuator 20.

In this case, the subsequent clockwise rotation of the lever arm 10 will only serve to reposition it close to the first flap 3; by doing so automatically the release actuator 34 will be repositioned so that its terminal end is positioned in proximity to the arcuate surfaces of the second tooth 33 of the cam 28, as illustrated in Figure 1.

It has thus been found that the invention has achieved the aim and objects mentioned above, having achieved a device in which the element suitable for controlling the closing and opening is constituted by the lever arm 10 on which a motion according to a single direction which in the particular embodiment illustrated is the anti-clockwise one.

A rotation in the opposite direction imposed on the lever arm has no actuating function of the closing and opening phases, resulting in this rotation being passive as it only allows the repositioning of the lever arm, unloaded from any tension, in the rest position close to the first flap 3 .

In this way, the clamping and opening operations are easier both because the effort is always applied on the lever arm in the same direction and because the load application starts when the lever arm is already raised with respect to the first flap. 3 and therefore is in a more favorable position to be gripped with force by the user.

Furthermore, during the opening phase, the effort to be overcome is not that of the tie rod 9, but a reduced effort thanks to the servo mechanisms consisting of the cam 28 and the release actuator 34.

The opening-closing operating sequence is therefore also simplified, since the user always and only acts on the lever arm, the latter being free from stress after closing.

The invention is naturally susceptible of numerous modifications and variations, all of which are within the scope of the same inventive concept.

Thus, for example, a further embodiment of a clamping device 101 is illustrated in Figures 13 and following.

This device consists of an attachment element 102, such as a rack or one or more teeth integral with a first flap of the shoe.

The clamping device is also constituted by a traction element 104, preferably consisting of a pawl at one end of which, adjacent to the base, there is a first transverse pin 105 interacting with the hooking element 102 and to whose opposite end it can be associated , by means of a second pin 106, an interconnection element 109.

The clamping device 101 also constitutes a lever arm 110 having at a first end 111 a pair of first wings 112a, 112b, between which a first pair of hair dryers are made transversely respectively starting from the free end. pivoting of the arm itself, by means of a fourth pin 116, between a pair of first shoulders 117a, 117b protruding from a base 118 attached to the second flap of the sports shoe.

The end of a tensioning actuator consisting of a pair of connecting rods 120a and 120b is associated in correspondence with a third pin 108 placed in correspondence with the interconnection element 109, a longitudinal slot 142 being formed thereon.

At the opposite end, the pair of connecting rods 120a and 120b is articulated, by means of an eighth pin 143, externally to the first wings 112a and 112b of the lever arm 110.

In correspondence with the same eighth pin 143, near the first end 111 and in the space between the first wings 112a and 112b of the lever arm 110, there is articulated a release actuator 134 which has a length such as to position the terminal end 136 at the above the fourth pin 116.

The device is also constituted by a tension release element 144 which is constituted by a spring at an idle fulcrum end, by means of a ninth pin 145, to a slide 146 having an annular conformation such as to be able to be slidably positioned, close to the base 118 in the space below the fourth pin 116,

This spring has the free end counter-shaped to the fourth pin 116 while it cooperates with an elastically deformable element such as a spring 147, interposed between the lower surface facing the base 118 and the latter so as to force said spring itself upwards .

The slide 146 protrudes beyond the fourth pin 116 in the direction of the second flap to be joined, the other end being pivoted, by means of a tenth pin 148, to the end of the interconnection element 109 not interacting with the third pin 108.

From the perimeter edge of the slide 146 adjacent to the ninth pin 145 protrudes upwards a third tooth 149 adapted to block the possible slipping of the slide beyond the fourth pin 116 in the direction of the first flap to be joined.

The use of this second embodiment is as follows: starting from the closed condition, illustrated in Figure 13, the traction element 104 is engaged with the hooking element 102 while the release element 144, consisting of the spring, is placed in abutment, thanks to the presence of the spring 147, with the fourth pin 116, as illustrated in figure 17.

The sliding of the slide 146 with respect to the base 118 is therefore blocked, keeping the device in a stable closing position with the lever arm unloaded from stresses.

The dynamic phase of beginning of the active release stroke occurs after a first rotation imparted to the lever arms and then starting, for example, from the angular position illustrated in figure 14.

Starting from this position, the release actuator 134 begins to interact with the release element 144 by exerting a pressure on it in contrast with the spring 147 to force its disengagement from the fourth pin 116.

Therefore, by continuing an anti-clockwise rotation of the lever arm 110, the pressure exerted by the release actuator 134 on the release element 144 causes the latter to disengage from the fourth pin 116 thus allowing the free sliding of the slide 146 in the direction of the first flap to be joined as illustrated in figures 15 and 18.

The stroke of the slide 146 is determined by the length of the slots 142, while the presence of the third tooth 149 prevents any accidental slipping of the slide with respect to the base 118 as this third tooth would eventually abut the fourth pin 116.

Starting from the disengagement of the spring from the fourth tooth 116, the clamping is de-tensioned; once the traction element 104 has been de-tensioned, the passive phase of the rotation of the lever arm in a clockwise direction begins, which then allows its repositioning, in rest conditions, close to the first edge.

The device then reaches the opening position as illustrated in figure 16.

The dynamic phase of beginning of the active stroke of the device to achieve its closure brings the first pin 105 to interact with the hooking element 102.

By doing so, as illustrated in Figure 19, the connecting rods constituting the tensioning actuator will push the slide 146 with an anti-clockwise rotation impressed on the lever arm 110 until the free end of the release element 144 is brought back to engage with the fourth pin 116.

In this phase the release actuator 134 is inactive. The final coupling step is then achieved in which the lever arm 110 is still not stressed and can therefore be repositioned close to the first flap to be assembled in the rest position, as illustrated in Figures 20 to 21.

Therefore also this solution, like the previous one, allows to achieve the intended aim and objects.

The device is naturally susceptible of numerous modifications and variations, all of which are within the scope of the same inventive concept.

Naturally, the materials and the dimensions that constitute the individual components of the device may also be the most pertinent according to specific requirements.

Claims (33)

CLAIMS 1) Clamping device, particularly for sports shoes comprising an attachment element, integral with a first flap and with which a traction element interactively connected to a lever arm at a first end transversely pivoted idle between the shoulders of a base fixed to a second flap, which is characterized in that said lever arm controls the opening and closing operations of said device by a rotation imparted thereto in the same direction. 2) Device as in claim 1 which is characterized by the fact that said lever arm can alternatively control, to a rotation that can be imparted to it in one direction only, the activation of both the closing and opening phases of the device in the meantime for a rotation in the opposite direction said lever arm has no actuating function for said closing and opening phases, said rotation being passive since it is suitable for allowing only the repositioning of said lever arm, unloaded from any tension in the rest position close to said first flap. 3) Device as per claims 1 and 2, comprising an attachment element, such as a rack or one or more teeth integral with said first flap, and a traction element, preferably consisting of a pawl at one end of which, adjacent to the base, there is a first transverse pin interacting with said coupling element and to whose other end an interconnection element can be associated, by means of a second pin, an element of interconnection at the other end which in turn can be associated, by means of a predisposed third pin, in correspondence with the free ends of a tie rod, which is characterized by the fact that said lever arm has at a first end a pair of first wings between which a first a second and possibly a third pair of holes are obtained transversely respectively, starting from the free end. 4) Device as per claims 1 and 3 wherein said lever arm is transversely idle fulcrum, by means of a fourth pin, between a pair of first shoulders protruding from a base attached to the second flap to be joined of said sports footwear, which is characterized by the said fourth pin passes in correspondence with said first pair of holes, with said fourth pin being pivoted between said first wings, a tensioning actuator. 5) Device as per claims 1 and 4 which is characterized by the fact that said tensioning actuator is constituted by a body that can be housed between the second wings of said tie rod, said body having an essentially parallelepiped shape with a fourth hole at the ends, a seat for said fourth pin, and a fifth hole, seat for a fifth pivot pin of said actuator itself in correspondence with a sixth pair of holes formed at said base of said tie rod. 6) Device according to claims 1 and 5 which is characterized in that said tensioning actuator has an axial seat passing through a tension release element. 7) Device according to claims 1 and 6 which is characterized in that said tension release element is constituted by a cam rotatably associated at the lower surface, facing said base, of said tensioning actuator. 8) Device as claimed in claims 1 and 7 which is characterized by the fact that said cam has predisposed sixth pins projecting laterally therefrom adapted to be rotatably positioned in correspondence with predisposed and counter-shaped housings obtained on the lower surface of said tensioning actuator. 9) Device as per claims 1 and 8 which is characterized by the fact that said cam presents, in a side view, an essentially "S" shaped conformation to define a first tooth, able to make an abutment in correspondence with said, above, base of said ti rant and a second tooth, interacting with a release actuator. 10) Device as per claims 1 and 9 which is characterized by the fact that said release actuator is constituted by a lever at the other end pivoted between said first wings of said lever arm in correspondence with said second pair of holes by means of a seventh pin. 11) Device according to claims 1 and 10 which is characterized in that said release actuator can pivot with respect to said lever arm, its terminal end interacting with the facing arcuate surface of said second tooth of said cam. 12) Device as per claims 1 and 10 which is characterized by the fact that said release actuator overhangs the underlying end of said tensioning actuator on which said fourth hole is made, said release actuator resting on said end in the closed condition for said device. 13) Device as per claims 1, 11 and 12 which is characterized by the fact that said release actuator interacts with an elastically deformable element consisting of a prearranged spring able to force said release actuator in the direction of the underlying end of said tensioning actuator . 14) Device as per one or more of the preceding claims which is characterized in that it comprises a covering element consisting of a plate at one end having a seventh transverse hole housing an eighth pivot pin between said first wings of said lever arm in correspondence with said third pair of holes. 15) Device as per one or more of the preceding claims which is characterized by the fact that said first wings of said lever arm can be attached, to a predetermined rotation imposed on said lever arm itself, in correspondence with a pair of second lateral shoulders obtained on said tensioning actuator at the pivot end of said fourth pin. 16) Device as per one or more of the preceding claims which is characterized in that said lever arm, starting from the closed condition, is unloaded up to a predetermined angle of rotation that can be imparted thereto with respect to said first flap. 17) Device as per claims 1 and 16 which is characterized by the fact that beyond said angle of rotation the displacement of said lever arm involves the interaction of said free end of said release actuator with said second tooth of said cam so as to impose to the latter a rotation in the same direction around said sixth pins. 18) Device as per claims 1 and 17 which is characterized by the fact that the rotation of said cam, imposed on it by said release actuator, forces the lifting, with respect to said base, of said tensioning actuator until it imposes the detensioning of said traction element. 19) Device as per claims 1 and 18 which is characterized by the fact that after the detensioning step of said traction element, an opposite rotation can be imposed on said lever arm to allow the repositioning of said lever arm, relieved of tensions, close to said first flap. 20) Device as per claims 1 and 19 which is characterized by the fact that starting from the previous position, said lever arm imposes, upon a new rotation imparted to it, the engagement of said first pin in correspondence with said coupling element making abutment of said first wings on said pair of second lateral shoulders present on said tensioning actuator so as to push the latter up to bring it into a stable closed condition in which the axis of said fifth pin is positioned, with respect to said base, at a height lower than the axis of said fourth pivot pin of said tensioning actuator to said lever arm. 21) Device as per one or more of the preceding claims which is characterized in that in a second embodiment the end of a tensioning actuator constituted by a pair of connecting rods, a longitudinal slot being formed thereon. 22) Device as per claims 1 and 21 which is characterized in that at the opposite end said pair of connecting rods is articulated, by means of an eighth pin, externally to said first wings of said lever arm in correspondence with said third pair of holes. 23) Device as per claims 1 and 22 which is characterized in that in correspondence with said eighth articulated pin, near said first end of said lever arm and in the space between said first wings, a release actuator having a length such as to position its terminal end above said fourth pin. 24) Device as in claims 1 and 23 which is characterized in that it comprises a tension release element consisting of a spring at an idle fulcrum end, by means of a ninth pin, transversely to a slide. 25) Device as claimed in claims 1 and 24 which is characterized in that said slide has an annular conformation such as to be able to be slidably positioned close to said base in the space below said fourth pin. 26) Device as per claims 1 and 25 which is characterized by the fact that said spring has the free end counter-shaped to said fourth pin, said spring cooperating with an elastically deformable element, such as a spring, interposed between said base and the lower surface of said spring so as to force it to move away from said base itself. 27) Device as per claims 1 and 26 which is characterized by the fact that said slide protrudes beyond said pin in the direction of said second flap to be joined, at the other end of said slide being pivoted, by means of a tenth pin, the end of said interconnection element not interacting with said third pin. 28) Device as per claims 1 and 27 which is characterized by the fact that from the transversal perimeter edge of said slide adjacent to said ninth pin, a third tooth protrudes upwards, suitable for blocking any slipping of said slide beyond said fourth pin in the direction of said first flap to be joined. 29) Device as per one or more of the preceding claims which is characterized in that, starting from the closed condition, beyond a predetermined angle of rotation of said lever arm, said release actuator interacts with said release element by exerting it a pressure in contrast with said spring to force its disengagement from said fourth pin. 30) Device as per claims 1 and 29 which is characterized in that upon a further rotation in the same direction imposed on said lever arm, said release actuator causes the disengagement of said release element from said fourth pin allowing the free sliding of said slide in the direction of said first edge to be joined, the stroke of said slide being determined by the length of said longitudinal slots. 31) Device as per claims 1 and 30 which is characterized in that starting from the detensioning condition of said traction element, a rotation imparted to said lever arm in the opposite direction is passive, since said lever arm is unloaded and can be repositioned close to said first flap. 32) Device as per claims 1 and 31 which is characterized in that, starting from the previous position, a new rotation imparted to said lever arm leads to the interaction of said first pin with said coupling element, said connecting rods by dragging said slide in the opposite direction said hooking element to allow the engagement of said release element with said fourth pin to achieve the stable closing condition and relieving said lever arm from any effort. 33) Clamping device, particularly for sports shoes, as in one or more of the preceding claims which is characterized by what is described and illustrated in the attached drawings.