FR2668687A1 - SPORTS SHOE, IN PARTICULAR FOR WALKING AND DOWNHILL SKIING WITH A REMOVABLE COLLAR. - Google Patents

Abstract

A shoe with an initially low upper is characterised in that the collar (13) comprises, on either side of its zone of articulation straddling the top of the upper (10), its own elastic locking means which are capable of rendering it manually detachable and consist, respectively, of a buttonhole (50, 60, 70, 80), of which at least a part (51c, 51d-62, 63-72-83) is elastically deformable outside of its plane, in order to permit its engagement by deformation over the head (19a) of a stud (19) forming a button integral with the heel stiffener (12), its shape according to an initial plane then being reassumed behind the said head (19a) of stud (19), of which the dimensions are greater than those of the buttonhole (50, 60, 70 80). Application to sports shoes.

Description

The present invention relates to a sports shoe, intended for sports

  requiring a longitudinal mobility of the foot with respect to the leg and good ankle holding and which is more specifically adapted to walking (hiking,

  trekking) or cross-country skiing.

  However, in this last area, there are currently two main techniques

  who are the alternate step and the skater step.

  According to the well-known alternative pitch technique, this is defined by repetitive cycles in which alternate, motor phases and rest phase; a motor phase corresponding to an impulse provided by one leg, being succeeded by a rest phase where one slides on the other leg, the skis remaining

  substantially parallel during these cycles.

  Contrary to this, according to the technique of the skating step, the lower gear works on sliding supports, which forces the skier to exert a directed thrust laterally, with respect to his trajectory, by making his skis diverge for

build on the edges.

  It is easy to understand that such sports impose on the shoe

  different requirements depending on whether we practice the alternative step or the skater's step.

  Indeed, the alternative step requires the shoe only forward / backward flexibility in the direction of movement for the movements of extension / flexion of the leg, whereas in the case of the skater step, an additional requirement is required in addition to the previous one, which is to obtain maximum stiffness of the shoe in the direction perpendicular to the movement for good ankle performance It should be noted that the requirements of the shoes for the

  no skaters are the same as for walking shoes.

  It is for these different reasons that there are currently shoes with low shank for the practice of the alternative step on the one hand, and shoes with high shank for the practice of not skating or walking, on the other hand In a similar vein, high articulated upper shoes are desirable for hiking while low-stemmed shoes are needed for

  sport practice that requires only a step of the foot.

  In any case, two types of shoes are necessary according to whether one wishes to practice the technique of the alternative step or that of the skater's step, that is to say according to whether one wishes a shoe allowing only a unfolding

  of the foot or guaranteeing both such a course and a good transverse behavior.

  In the patent application No. 89 11936 of 07 September 1989 filed by the applicant, there is described a shoe for the practice of not skater, and for hiking without upper stem, but with a low stem provided with a rear buttress and comprising a rigid collar permanently fixed to said rear buttress, this collar being intended to surround the bottom of the leg, and therefore constituting a kind of articulated rod which has a great flexibility front / rear, all

  guaranteeing a good lateral resistance of the user's leg.

  According to this same application, the articulation of the rigid collar on the lower stem is located at the upper end thereof, the collar extending upwards from its articulation, beyond the end. upper stem. This document therefore teaches the manner of obtaining, from a low-stemmed shoe, a high-stemmed shoe, which moreover is articulated, but does not solve the problem posed, namely to offer a shoe that can be

  used both for the practice of the alternative step and the step of skater.

  It is also known to make a collar of the aforementioned type removable, but in this known shoe such a collar does not in itself constitute a high upper, and only reinforces a shoe initially designed with a high stem, therefore irremovable, in the area of the ankle, for better support thereof It is well understood that, in this case, the fact of removing the collar does not allow to obtain a low-stemmed shoe, usable for the practice of the alternative step and does not allow

  to obtain a shoe with a high upper that would no longer be reinforced.

  Not only does such an arrangement also not solve the problem posed, but in addition, the fastening means of the collar on the shoe provided, are unsuitable for a withdrawal or a rapid implementation of the collar on the

  track, for a change of technique, especially during a race.

  Indeed, these fixing means consist of an elastically deformable nail coming from the rear buttress and formed of a plurality of parallel elastic arms arranged around the transverse axis of articulation of the collar, and which engage by a transverse action, in a cylindrical hole of the necklace until hooks posed in corolla on the end of said arms, come to snap

  elastically on the outer face of the collar emerging from it.

  Therefore, such a corolla constitutes a protrusion that may be dangerous in the event of a fall or snagging with another skier Furthermore, such fastening means require for the removal of the collar the use of a suitable clamping tool. to pinch the corolla formed by the end of the arms, thus making such a withdrawal manually difficult (even impossible), given the small surface area of

  gripping available, often snowy moreover.

  The object of the present invention is to overcome these various disadvantages and to provide a dual-use sports shoe, that is to say with low rod or high articulated rod, easily transformable with simple means and without requiring

special tools.

  For this purpose, the invention relates to a sports shoe, in particular for walking and cross-country skiing, obtained from a low upper with a rear buttress and comprising a rigid collar intended to surround the bottom of the leg and articulated on the rear buttress of the rod at the upper level thereof, the collar extending upwards from its articulation beyond the end of the rod, characterized in that the collar comprises of other than its articulation area overlapping the top of the rod, resilient locking means which are specific to it, able to make it manually removable and constituted respectively by a buttonhole, at least a portion of which is elastically deformable out of its plan, to allow its engagement by deformation on the head of a nail forming a button integral with the buttress, and then resume its shape according to an initial plan, behind said nail head, whose dimensions are superior to those of the

1 O buttonhole.

  In this way, a dual-use shoe is obtained, more particularly adapted to the skater's step or to the hike, if one sets up the collar making it possible to constitute a shoe with high upper, or more particularly adapted to the alternative step or walking if, on the contrary, we take away the

  necklace thus allowing to find a shoe of origin, with low stem.

  According to another characteristic of the invention, the wide-headed nails forming buttons are located on a transverse axis substantially at the level of the natural articulation of the leg on the foot, which allows a better comfort since there is

concordance between the two axes.

  According to another characteristic of the invention, the nails are made integral with the buttress, by force introduction into cylindrical protruding holes.

  obtained from material with the collar.

  According to an exemplary embodiment of the invention, the buttonhole is defined by a segment of a circle, whose rope is of a value at least equal to the diameter of the nail head and a longitudinal slot opening through one of its ends in the circle segment and its other end in a cylindrical portion, whose diameter is at least equal to that of the projections, the longitudinal slot being transversely delimited by elastically deformable lips out of their plane during the introduction of the head of the nail and in their plane during the passage of the projection, until elastic latching thereof in the cylindrical hole, whose diameter is greater than the width of the slot, to define near the entrance

  of the hole two retaining beads of the collar on the projection.

  Other examples of realization will appear during the description which will

  follow, which will also show other characteristics, to better understand the invention, with reference to the attached schematic drawings in which:

  Figure 1 is a side view of the shoe according to the invention.

  Figures 2 and 3 are partial schematic views, on a larger scale, according to Figure 1 showing a collar according to two successive phases of assembly. Figures 4 and 7 are partial schematic views showing different embodiments of locking means of the collar according to the invention.

  Figure 8 is a partial sectional view along the line VIII VIII of Figure 1.

  The shoe represented by way of example in FIG. 1 is particularly suitable for skating or skating pitch or for hiking and has the appearance of a shoe originally constituted of a low stem 10. that is to say a rod whose rigid parts do not extend in height beyond the malleoli, an outer sole 11 and a lacing system 20 of type

known in itself.

  The rod 10 is of flexible material and is provided at the heel of a buttress

  rear 12 can be achieved in any case known per se.

  This buttress 12 is preferably made of rigid synthetic material, and

  extends over the entire back of the shoe, all around the heel of it.

  This buttress 12 extends, in the area of the malleolus, to the top of the stem, for the reception of an articulated collar 13, and has at its upper end, at the level of these malleoluses, on each side of the shoe , a protrusion or boss 12a extending outwardly substantially perpendicular to the wall of the buttress and adapted to be introduced into an associated cylindrical hole 13a, provided on

  each side of the collar 13 (see Figure 2).

  Each boss 12a is also provided with a hole 12b for fastening the collar 13 by means of nails 19 (see FIG. 8). By this arrangement, the collar 13 can therefore be hingedly mounted on the projecting parts 12a of the buttress of the stem to

  the upper end of it.

  The heads 19 has nails 19, once engaged in the holes 12 b, serve to stop the collar 13, while the bosses 12 has materialized the axis of rotation 30 of the collar on the rod It will be noted that the heads 19 have a diameter D much more

  bigger than that of the nail itself.

  Note also that the nails 19 can be replaced by all other modes of connection allowing rotation such as rivets However, the use of nails 19 is particularly advantageous because it allows a pose simply by applying a pressure on the head 19 a, without the need for a counterpart

in the case of rivets.

  Furthermore, the nails 19 will advantageously consist of a relatively flexible material with respect to a metal rivet, such as delrin, so that their head 19 has followed the possible deformations of the rigid collar 13, for example during a twist of the leg, such a construction to prevent tearing of

these nails during such a twist.

  The articulated collar 13 is constituted by a sleeve made of rigid material and

  especially in a synthetic material such as pebax.

  This collar 13 extends up to the bottom of the calf and surrounds the entire lower leg It is open at its front to allow the introduction of the foot into the shoe and is provided with clamping means 15 of the type known in itself, and

  constituted for example by self-gripping means.

  This collar 13 is also provided at the rear with a notch 13b intended for

  1 0 facilitate the rotation to the rear of this collar (see dashed position in Figure 1).

  As will be readily understood, the high height of the collar 13 allows excellent lateral resistance of the leg when practicing skating or hiking, such height also allowing greater distribution on the

  leg reaction efforts and, therefore, better comfort for the user.

  Indeed, the total and independent articulation of the collar 13 on the rod allows it to rotate freely and without any inconvenience for the user Moreover, the tongue 42, as well as the lacing system 40, the shoe does not extend, in height, not beyond the bending fold of the foot of the user, so as not to

interfere with flexion

  The position of the hinge pin 30 of the collar 13 on the stem is chosen so as to achieve the best compromise between comfort and an axis as close as possible to the natural position of the tibiotarsal joint, depending different

morphologies and foot sizes.

  According to the invention, the collar 13 has in its articulation zone overlapping the top of the rod 10 locking means which are specific to it, able to make it manually removable and cooperating with the mounting with the projecting bosses 12 integral with the counterfoil 12 and embodying the transverse hinge axis 30. These means are arranged on either side of the hinge zone of the collar 13 and consist respectively of a buttonhole 50 of axis of symmetry XX '(FIG. 3) defined, on the one hand, by a segment of circle 50 has recessed whose length of rope C is of a value at least equal to the diameter D of the head 19 of the nail 19, and secondly, by a longitudinal slot 51, arranged symmetrically to the axis XX 'and opening through one of its ends 51a in the circle segment 50a and by its other end 51b in a circular opening 13a, whose diameter Di is at less equal to that of projections 12 to which it commits itself The longitudinal slot 50 is delimited transversely by lips 51c and 51d which are deformable elastically out of their plane during the introduction of the nail head 19a. This introduction is effected first by introducing in an inclined manner. , one side of the head 19a in the circle segment 50a, then exerting a lateral pressure on the collar 13, tending to deform said lips out of their plane, and passing the other part of the head 19 over the lips 51c, 51d which then take up their position

  initial, according to a plan of origin, behind the head 19 of the nail 19.

  During this introduction, the lips 51c and 51d also undergo another elastic deformation tending to spread them laterally, in the same plane this time, to the passage of the projection 12a in a direction F of introduction of the collar 13, and this until elastic snap-fastening of said protrusion 12a in the cylindrical hole 13a The diameter Di of the hole 13a is greater than the width I of the slot 51, to define at 0 near its inlet 51b, two flanges 52, 53 for retaining the collar 13 on the

projection 12 a.

  The longitudinal axis XX 'of the buttonhole forms an angle α with respect to the generally vertical axis YY' of the collar 13, substantially equal to 450, but, of course, the axis XX 'of the buttonhole may merge with the YY 'axis of collar 13 or form

A different angle ox.

  To allow an easier introduction of the projection 12a in the slot 51, the latter comprises a flared portion formed by the ramp-shaped introduction edges 51e and 51j on the end side 51a of said slot 51 while the remainder of the slot 51 has a substantially constant width I of less than

diameter D1 of the projection 12 a.

  The embodiment shown in FIG. 4 differs essentially from the preceding one, in that the buttonhole 60 is defined by a circular hole 61 partially delimited on its periphery by two branches 62, 63 in the form of an annular sector forming jaws. The branches 62, 63 arise on the collar 13 itself, and are defined on the one hand by the hole 61 and on the other hand by a half-circular slot of larger diameter 69, and their free ends 62a and 63a are deformable out of their plan, to allow their engagement under the head 19 a of the

nail 19.

  The introduction of the head 19a of the nail 19 is substantially as described above, by tilting a first portion of the head 19a over a branch, 62 for example, and then above the other 63 with a gesture

  straightening applied to said head.

  The free ends 62a, 63a delimit between them a passage 64 of width Il less than the diameter D 2 of the cylindrical hole 61 in which the projection or projection 12a engages when mounting in a direction Fi, to define at the entrance of said hole 61, two retaining beads 65 and 66 The free ends 62a and 63a form an angle such

  defining a flared introduction portion of width 12> 11.

  The embodiment shown in FIG. 5 differs essentially from that of FIG. 4 in that a clearance J is provided between the outer periphery of the branches 62 and 63 in the form of an annular sector and the corresponding part of the collar 13 of which they are arranged. are produced by cutting, so as to give the said branches 62, 63 a

  transversal elasticity in their plane.

  The collar 13 is mounted on the head 19 a as previously in a direction of engagement F 2. According to an alternative embodiment shown in FIG. 6, the buttonhole 70 is defined by a circular hole 71 with a diameter D 3 substantially equal to that of the projection 12a and partially delimited on its periphery by a tongue 72, arranged radially relative to the center O of the hole 71 The tongue 72 is delimited by 1 O lateral recesses, constituted here by grooves 73, 74 extended by cuts 75, 76 able to make said tongue 72 elastically deformable out of its plane, this to allow the engagement of said buttonhole 70 on the head 19 of the nail 19, the passage through the hole 71 is made possible by depressing the nail in the collar 13, which causes the tongue 72 to be erased out of its plane, then its elastic return in its plane, behind the head 19 a, thus bearing

  over the entire area surrounding hole 71.

  The passage defined by the tongue 72 folded with the opposite end of the hole

  71 is at least equal to the diameter D 3 of the head 19 of the nail 19.

  The embodiment shown in FIG. 7 differs essentially from the previous one of FIG. 6, in that the buttonhole 80 is of generally rectangular shape, the length L of which is substantially equal to the diameter of the head 19 a.

  nail 19, to allow its passage to the assembly.

  In the aforementioned rectangle is a circle defining arcuate recesses

  circle 81 and 82 in which the projection 12a is able to be housed.

  The recess 81 is thus formed in a resilient tongue 83, elastically deformable out of its plane, thanks to two lateral grooves

parallels 84 and 85.

  The tongue 83 is made on one of the long sides of the rectangle, corresponding to the length L, while on the opposite side 86 is provided

  the recess 82, this side 86 thus forming a rigid bearing face.

  It is on this face 86, that initially bears the head 19 has by an inclined engagement, in the direction F 5, then, by pivoting on itself while arching on the said face 86, it overcomes the elastic force of the tongue 83, to cause its erasure After passage of the head 19 has, the tongue resumes

  naturally its position in its plane, behind said head 19 a.

  In the two previous figures 6 and 7, the head 19 has been shown in FIG.

  dotted in overlay on buttonholes 70 and 80.

  Many other variants could have been imagined, therefore, those

  described above are not limiting.

Claims (7)

  1) A sports shoe, particularly for walking and cross-country skiing, obtained from a lower rod (10) provided with a rear buttress (12) and comprising a rigid collar (13) intended to surround the bottom of the leg and articulated on the rear buttress (12) of the rod (10) at the upper level thereof, the collar (13) extending upwardly from its articulation beyond the end of the rod (10), characterized in that the collar (13) has on either side of its articulation zone overlapping the top of the rod (10), resilient locking means which are specific to it, able to make it manually removable and constituted respectively   by a buttonhole (50, 60, 70, 80), of which at least a portion (51c, 51d-62, 63-72-   83) is elastically deformable out of its plane, to allow its engagement by deformation on the head (19 a) of a nail (19) forming a button integral with the buttress (12), and then resume its shape following an initial plane, behind said nail head (19a) (19), the dimensions of which are greater than those of the buttonhole (50, 60, 70, 80).   2) sports shoe according to claim 1, characterized in that the nails (19) wide head (19 a) forming buttons are located on a transverse axis (30)   substantially at the level of the natural articulation of the leg on the foot.   3) Sports shoe according to claims 1 and 2, characterized in that the   nails (19) are made integral with the buttress 12, by force introduction into   holes (12b) of cylindrical projections (12a) made of material with the collar 13.   4) Sports shoe according to claims 1 to 3, characterized in that the   buttonhole (50) is defined by a recessed circle segment (50a) whose rope (c) is at least equal to the diameter (D) of the nail head (19a) (19) and by a longitudinal slot (51) opening at one of its ends (51 a) in the circle segment and at its other end (51 b) in a cylindrical part (13 a), whose diameter (Di) is at least equal to that protrusions (12a), the longitudinal slot (50) being delimited transversely by lips (51c and 51d) elastically deformable out of their plane during the introduction of the nail head (19a) and in their plane during the passage of the protrusion (12 a), until elastic latching thereof in the cylindrical hole (13 a) whose diameter (Di) is greater than the width (1) of the slot (51), to define near the hole entrance   (13a) two retaining beads (52, 53) of the collar (13) on the projection (12a).   ) Sports shoe according to claims 1 to 3, characterized in that the   buttonhole (60) is defined by a cylindrical hole (61) partially delimited on its periphery by two legs (62, 63) in the form of an annular sector forming a jaw which originates on the collar (13) itself, and whose free ends (62) a and 63 a) are elastically deformable out of their plane to allow their engagement under the head (19 a) of nail (19) and delimiting between them a passage (64) of width (11) smaller than the diameter (D 2) of cylindrical hole (61) in which engages the projection (12 a) of the assembly, to define at the inlet of said hole (61), two   retaining beads (65, 66) of the collar (13) on the projection (12 a).   6) sports shoe according to claim 5, characterized in that a clearance (J) is provided between the outer periphery of the annular sector-shaped legs (62, 63) and the corresponding part of the collar (13) from which they are born by   cut, so as to give them an elasticity in their plan.   7) Sports shoe according to claims 1 to 3, characterized in that the   buttonhole (70, 80) is defined by a cylindrical hole (71, 81) of a diameter (D 3) substantially equal to that of the projection (12 a) and delimited by at least one radial tongue (72, 83) elastically deformable out of its plane, to allow the engagement of said buttonhole (70, 80) on the head (19 a) nail (19), and the passage of which is made possible by two lateral recesses (73, 74 and 84, 85) opening into said cylindrical hole (71, 81) and defining with it a   Passage of width at least equal to the diameter of said head (1 9 a).