Abstract:
Assembly system for a sole of a shoe for receiving a piece of equipment adapted for use with the shoe is provided which includes a first assembly element having at least one nest for initially receiving a portion of a piece of equipment, and a second assembly element for positioning and immobilizing the piece of equipment on a sole after the first assembly element receives a portion of the piece of equipment. In the field of cycling shoes, a sole with these features is of a universal type that enables the installation of most existing wedge fastening elements.

Description:
This application is continuation of application Ser. No. 08/193,204, filed Jun. 9, 1994, now abandoned, which is the national stage of International Application PCT/FR92/00790, filed Aug. 12, 1992. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates, in the field of the shoe as a whole, to a system enabling the assembly on the sole, of pieces of equipment linked to the use of the shoe. The invention, also relates to the pieces of equipment, the shoes, and the soles fitted with the assembly system. 
     2. Discussion of Background Information 
     For instance in the field of sport shoes, for cycling, in particular, there exists clips fastened to the sole which enable the connection of the shoes to the pedals. The soles are shaped according to the type of wedge fastening foreseen and the user must thus choose his shoes with respect to available wedge fastening equipment. If the user has several types of wedge fastenings available, he must foresee as many different pairs of shoes. 
     SUMMARY OF THE INVENTION 
     The purpose of the invention is to obviate this the above-described short-coming while offering a shoe whose sole is &#34;universal&#34;, i.e., able to accommodate various types of clips and/or additional pieces of equipment used as interfaces. 
     Such a shoe can accommodate other types of equipment according to the field of use such as, for example, spikes for golf shoes or soccer shoes. 
     According to the invention, the assembly system of an equipment on the sole comprises at least two assembly modes whose first one comprises at least one nest and whose second one, implemented after the first one, is made of positioning and immobilization means of the equipment on the sole. 
     The use of a nest arranged preferably at the front of the sole enables improvement in the resistance of the assembly in an area where the sole exhibits very small thickness. This nest also advantageously enables quick positioning of the equipment on the sole and creating narrow contact between both elements. 
     According to a preferred embodiment of the invention, the nest comprises a mortise at the front of the sole pad, and, on the front section of the wedge fastening equipment, a bayonet-shaped lug. 
     Thus, the equipment can be positioned on the sole, and, at the same time, both parts can be tightened together, which strengthens the assembly and limits tearing or disconnection problems. 
     Again, according to the invention, the positioning and immobilization means of the wedge fastening equipment on the pad are preferably made of nuts countersunk into the sole&#39;s thickness, which co-operate with screws fastened in recesses of the equipment. Other means can be contemplated such as a lock, a latch, and even a clicking or a snapping device. 
     Again according to the invention, the sole can comprise a recess in the main section of the pad, in order to center and accommodate the equipment. This recess can advantageously comprise lateral openings, arranged on both sides of the pad, which co-operate with ears arranged on the equipment, thus offering some kind of additional longitudinal locking system for the sole&#39;s equipment. These lateral openings are also interesting to provide an additional wedge fastening possibility directly on a pedal, using a suitable equipment. 
     The invention also relates to pieces of equipment fitted with the assembly system. 
     These parts comprise assembly means made of a bayonet-shaped lug, designed for integration into the sole&#39;s mortise, and recesses for the passage of screws, such as in the case of a screw and nut assembly. 
     According to a first embodiment, the equipment piece comprises a monoblock element fitted with lateral ears provided to fill up the lateral openings of the recess. This piece forms the pad and can be used for walking. It can also accommodate accessories such as cycling wedges that can be connected thereto using fastening screws. 
     According to another embodiment, the equipment piece comprises a monoblock section, fitted at the level of the sole&#39;s lateral openings, with a crosswise groove used for wedge fastening purposes for a cycling shoe. 
     According to another embodiment, still in the field of cycling shoes, the piece of equipment exhibits two sections. One fixed, fitted with the nesting lug, and the other one, adjustable, comprising a crosswise groove designed for wedge fastening the pedal, located at the level of the sole&#39;s lateral openings. The adjustable section advantageously comprises two longitudinal oblong holes which can be positioned onto a hole of the fixed section; while these holes enable the anchoring of both sections on the sole using fastening screws. 
     According to another embodiment, the cycling equipment section comprises, besides its fastening holes on the sole, longitudinal oblong holes which work together with a mobile metal part arranged between the sole and the equipment and which is used for adjustable anchoring of built-in wedge fastening elements. 
     According to an additional embodiment, the sole&#39;s pad does not exhibit any lateral borders to accommodate a piece of equipment forming the pad properly speaking, the piece comprising, besides the assembly system described above, lateral grooves in order to work with a pedal of the types described in French patents FR-A-2 526 748 and FR-A-2 620 412. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention will be better illustrated, without being limited to the said, by the following description of a special sole embodiment, given only for exemplifying purposes, in connection with different types of pieces of equipment able to be connected to it and represented in the appended drawings, in which: 
     FIG. 1 shows the sole according to the invention with a view seen from underneath, 
     FIG. 2 shows a possible embodiment of a piece of equipment designed to be adapted to the sole&#39;s pad, seen from underneath, 
     FIG. 3 is an enlarged section according to 3--3, of the piece of FIG. 2, mounted on the sole of FIG. 1, 
     FIG. 4 shows another embodiment of the piece of equipment, in two sections, seen from underneath, 
     FIG. 5 is an enlarged section according to 5--5 of the piece in two sections of FIG. 4, mounted on the sole, 
     FIG. 6 is a plane view of another possible embodiment of the piece of equipment, seen from underneath, 
     FIG. 7 is a section according to 7--7 of the piece of equipment of FIG. 6, mounted on the sole, 
     FIG. 8 shows the metal piece integrated into the equipment represented on FIG. 6. 
     FIG. 9 is a plane view of another piece of equipment, seen from underneath; 
     FIG. 10 is a section according to 10--10 of FIG. 9; 
     FIG. 11 is a plane view of a piece of equipment working together with a pedal fitted with rails; 
     FIG. 12 is a section according to 12--12 of FIG. 11. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     As represented in FIG. 1, the sole 1 according to the invention is a sole with a classical contour, associated with an upper skin not represented, to form a cycling shoe. 
     This sole 1 comprises, quite classically, a pad 2 at the level of its front section and a heel 3 at the rear. The pad 2 and the heel 3 are connected by a beam 4 designed to improve its stiffness. 
     The pad 2 comprises a recess 5, more or less oval in shape, arranged in the thickness of the sole and limited by a peripheral border 6. This recess comprises means to accommodate and position various types of equipment which, in the case of cycling shoes, consist of a toe clip selected according to the desired wedge fastening means, some embodiments of which will be described later. 
     The assembly system of the various pieces of equipment on the sole comprise a nest 7 arranged at the front end of the recess 5 of the sole and of the pieces. This nest comprises on the sole a mortise 8 which is more or less rectangular in shape, positioned crosswise on the middle axis XX&#39; of the sole, at the level of the border 6. This mortise 8 can go through the sole completely and end on the upper face. On the pieces of equipment, the nest comprises, as detailed further, a shape similar to that of a bayonet. 
     The assembly system is completed by a set of fastening and immobilization devices 9 of the equipment, implemented after the nest and comprising, for instance, nuts countersunk into the thickness of the sole. A nut 10 is arranged at the level of the rear end of the recess 5, on the side opposite the nest 7. The center part of the pad 2 and of the recess 5 comprises a combination of three nuts 11, 12 and 13, arranged in a triangle. The base of this triangle is defined by linking both nuts 12 and 13; this base has been arranged crosswise to the middle axis XX&#39; of the sole and it is located nearer the heel 3 than is nut 11. The vertex of the triangle is defined by the nut 11 arranged at the front; it is located more or less halfway between the nest 7 and the line linking the nuts 12 and 13, the line being more or less halfway between the nuts 10 and 11. 
     Moreover, the recess 5 comprises two side openings 14 arranged in the border 6 and positioned just behind the nuts 12 and 13. These openings 14 are used for certain types of equipment in connection with wedge fastening means provided in the thickness of the sole, FIG. 3. 
     FIGS. 2 to 12 show different types of wedge fastening equipment, without being limited to those illustrated for positioning and locking in the recess 5. These pieces of equipment constitute the wedge fastening and/or anchoring means properly speaking onto the pedal; they exhibit dimensions suited to the recess 5. 
     The various pieces of equipment comprise an engagement means of the nest 7 made of a bayonet-shaped lug 15, arranged at their front end. This lug is designed for embedding into the mortise 8 of the sole and locking in position therein. Various hole-shaped recesses are provided equally and suitably on these pieces of equipment to complete the fastening on the sole; this attachment is performed via screws working together with the countersunk nuts 10, 11, 12, 13, or a portion of the nuts. 
     FIGS. 2 and 3 show a first possible embodiment of this piece of equipment. This piece 16 is obtained by molding a PVC-type plastic material. It is more or less oval in shape and may comprise open cells on the top to reduce the weight of the piece. Its lower portion comprises a set of transverse streaks 17 or spikes or grooves, designed to facilitate contact with the ground or the positioning of wedge fastening elements. The lug 15 is centered on the extreme forward end and four holes 18, 19, 20, 21 are provided over its surface, each matching one of the countersunk nuts 10, 11, 12, 13 of the sole. The piece 16 also comprises two lateral ears 22 designed for embedding into the lateral openings 14 arranged in the border 6 of the recess 5. 
     Positioning the piece of equipment 16 into the recess 5 is carried out by incorporating the front lug 15 into the mortise 8 of the sole. Toggling the piece to the bottom of the recess 5 causes the front section of the lug 15 to be blocked in the mortise 8 (FIG. 3). The piece 16 is hugged against the bottom of the recess 5 and its assembly on the sole 1 is completed by fastening screws 100 located in the holes 18, 19, 20, 21 and the nuts 10, 11, 12, 13 respectively. The ears 22 are integrated into the lateral openings 14. The thickness of the piece 16 is such that it enables filling up the recess 5 of the sole; it serves as a pad. 
     This type of piece allows levelling the lower face of the sole; the shoe so fitted enables its user to walk normally. Moreover, the assembly screws provided evenly on its surface may allow fastening at least one wedge fastener C1, as represented in thin mixed lines in FIG. 3. The wedge fastening element thus built protrudes from the lower face of the sole 1. These wedge fastening elements can be of all types and they advantageously use the three center holes 19, 20 and 21 of the intermediate piece 16 and the three nuts 11, 12 and 13 of the sole to fasten them. 
     According to another embodiment represented in the frame located on the left side of FIG. 3, the piece 16 comprises a transversal groove 23. The width of this groove 23 corresponds to those of the lateral openings 14 arranged in the border 6 of the sole 1; it is used as a direct positioning and wedge fastening means of the sole on the pedal. The piece of equipment 16 is then used as such, without any additional wedge fastening accessory. 
     FIGS. 4 and 5 show another type of piece of equipment liable to be integrated to the recess 5 of the sole. This part 24 is made of two sections: a front one 25 and rear one 26. 
     The front section 25 comprises the lug 15 at its front section and comprises three assembly holes 27, 28 and 29 matching the nuts 11, 12 and 13 respectively of the sole. The hole 27 is located more or less on the middle axis of the body of the part 25; both holes 28 and 29 are arranged laterally, in a recess 30 open to the rear and closed laterally by rims 31 and 32. The lower face of the part 25, designed for contacting the ground, advantageously comprises a set of transversal grooves 33. The part 25 should lock onto the front section of the recess 5 via the lug 15 and a fastening screw integrated to the front hole 27, matching the nut 11. The part 25 is fixed and fills up only a section of the recess 5; the lateral rims 31 and 32 stop before the lateral openings 14 of the sole. The rear section 26 of the piece of equipment 24 is designed for partial integration into the recess 30 of the front counterpart 25. This rear section 26 shows a requirement smaller than the non-filled space of the recess 5. It comprises two longitudinal oblong holes 34 and 35 and, on the rear, a transversal groove 36. The oblong holes 34 and 35 are designed for correct positioning on the holes 28 and 29 of the front section 25 and on the nuts 12 and 13 of the sole. Fastening screws 100&#39; enable assembling the various sections amongst themselves; the oblong holes 34 and 35 enable adjusting the position of the part 26 in the recess 5. This position adjustment can be made from the front to the rear and also at an angle with respect to the middle axis XX&#39;; the transversal groove 36 used for wedge fastening the shoe on the pedal can thus be positioned practically without any restrictions according to the user&#39;s choice. In all cases, this transversal groove 36 matches the lateral openings 14 arranged in the sole. There is thus a wedge fastening part integrated to the sole which allows the user to walk normally. As regards this embodiment, it can be noticed that the nut 10 located at the rear end of the recess 5 is unused. 
     FIGS. 6 to 8 show another possible embodiment of the piece of equipment. 
     The overall shape and the sizes of this piece of equipment 37 correspond to those of piece 16 of FIG. 2. It has been enlarged in FIG. 6 to show the structural details better. 
     The body of the piece 37 is extended to the front by the lug 15 of the nest and it comprises, on the sides, two ears 38 designed for embedding into the openings 14 arranged in the border or rim 6 of the sole. The piece of equipment 37 is designed to fill up the recess 5 completely. It comprises four assembly holes 39, 40, 41 and 42 arranged respectively to match the nuts 10, 12, 13 and 11 of the sole, for the passage of fastening screws 100. The piece of equipment 37 also comprises four longitudinal oblong holes 43, 44, 45 and 46 arranged on lines which are parallel to each other. These oblong holes end with a recess 47 arranged on the upper face of the piece 37 and whose contour is represented in dotted lines, FIG. 6. This recess 47 is designed for receiving a sliding metal plate 48 arranged between the bottom of the recess 5 of the sole 1 and the piece of equipment 37. This metal plate 48, represented in FIG. 8, comprises four threaded holes 49, 50, 51 and 52, arranged for positioning opposite the oblong holes 43, 44, 45 and 46 of the piece 37. The couples of holes 43-49, 44-50, 45-51 and 46-52 enable fastening wedge accessories C2, C&#39;2, attached using anchoring screws 100&#34;. The wedge accessories C2, C&#39;2, represented in thin mixed lines protrude under the sole, from the piece of equipment 37; their position can be adjusted as required over the length of the oblong holes 43 to 46. An opening 53 has been arranged in the center section of the plate 48, at the level of the assembly hole 41, to allow the plate 48 to slide in the recess 47. 
     FIGS. 9 and 10 show a piece of equipment 55 of the same type as that described previously in relation to FIGS. 6 to 8. However, the wedge accessory C3 is different because it is integrated to a recess 56 arranged on the lower face. The depth of the recess 56 is at least equal to the height of the accessory C3 so that the user can walk normally, bearing on the piece of equipment 55 used as a pad. 
     FIGS. 11 and 12 show another piece of equipment 60 suited to a sole 1 provided without the rim 6, at least on the front section of the pad. 
     This piece of equipment 60 is accommodated in the recess 5 and is used as a pad. It also comprises lateral grooves 61 arranged as hollow sections against the sole 1 and used as recesses for rails 62 represented in thin mixed lines in FIG. 12. These rails 62 are part of a fastening device for shoes on pedals detailed in French patents FR-A-2 526 748 and FR-A-2 620 412. 
     The various embodiments of pieces of equipment described above are not exhaustive and it is quite possible to contemplate other types of parts used either directly as wedge accessories or for anchoring built-in wedge fastening means. 
     The structure of the means described above is particularly suited to cycling shoes, but other fields of application can also be contemplated (golf, soccer, etc.) for which the wedge means will be replaced with spikes etc. In all cases, the shoe can be suited as required according to the wedge accessory, or equivalent, as desired. The shoe thus shows a universal character since it can accommodate various wedge fastening means or equivalent; it also enables quick, easy and efficient modification of the wedge structure. 
     The shoe fitted with such a universal sole can advantageously be suggested in conjunction with a selection of at least two different pieces of wedging equipment. The user can thus install the equipment matching the equipment available; he does not need to change the whole shoe when he uses a different material.