FI75980C - Skiing for cross country skiing - Google Patents

Description

75980

Cross-country ski footwear - Skidsko för terrängskidning.

The present invention relates to a sports shoe sole as set out in the preamble of claim 1. Footwear of this type with outer wool parts (or extensions) is previously known; Examples are, in particular, sports footwear with studs under the sole, mountaineering shoes with hooks on the toe, cyclist's shoes with wedge-shaped plates and ski boots, and in particular footwear for cross-country skiing or hiking, etc. The protruding parts or extensions are usually attached this has a certain adverse effect on the wearer of the footwear on the one hand and in particular on the footwear itself on the other.

In practice, the sole of such known footwear is subjected to immediate strong mechanical effects (shear stress and tensile and bending stresses), in particular in the joining zones between the sole and its protruding parts or extensions. As a result, there is a risk that these stresses will weaken the base over time and cause the base to separate from said protruding parts or extensions.

The above-mentioned disadvantages occur in connection with all these types of sports footwear, and in particular the cross-country ski footwear currently available on the market. Known footwear for cross-country skiing are generally provided with a resilient sole comprising a forwardly extending elongate part, this elongate part being intended to act as a connecting member for fastening between the footwear and the ski. This elongated part, which acts as a flexible plate, allows good rotation of the foot during use of the ski. However, this solution has certain drawbacks with regard to the operation of the flexible plate, this plate being fixed to the ski by means of a kind of clamping devices 75980 2 in a plane perpendicular to the longitudinal axis of the sole.

In practice, this type of footwear is exposed to mechanical stress on its front where it forms an attachment to the ski.

These stresses cause various detachments between the sole and the toe of the footwear.

The present invention generally provides a solution for eliminating these side effects on the sole of a sports shoe, in particular a ski boot for cross-country skiing, the toe portion of which includes at least a partially covered front edge, said toe being stiffened the reinforcement has a vertical portion (8 ', 15') associated with the mounting plate (8,15), which is trapezoidal in shape and has a long side parallel to the plane of the base, characterized in that the reinforcement (8, IA) is fixedly connected to the arm ( 5.11) to the bottom (2.12) of the tough part in the area above the thickness.

It is clear that, thanks to this arrangement, the sole of the footwear does not directly follow the mechanical stresses occurring in the plane of the protruding part.

In a preferred embodiment, where the protruding part is formed by a single body connected to the base, one part of this body is located inside said base by means of an overlapping setting, while another part thereof extends beyond the front tip of the base to a limited extent.

According to one feature of the invention, the reinforcement includes in its corner rod-shaped part a hole by means of which a riveted connection can be made between the sole and the upper of the footwear in the toe part of the footwear.

Some embodiments of the invention will now be described, by way of non-limiting example, with reference to the accompanying drawings, in which:

Figure 1 shows a partial longitudinal section of a shoe with a reinforcement according to the invention of the Nordic shoe standard 50,

Figure 1a shows a detailed section of the improved joint between the base and the shaft,

Figure 2 shows a top view of the base according to Figure 1 at the level of the joint between the base and the shaft,

Figure 3 shows a partial longitudinal section of an embodiment of a base including a reinforcement according to the invention, a part of which is also intended to cooperate with fastening devices,

Figure 4 shows an end section of the pre-framed bottom.

Figure 5 shows a top view of said base in the connection plane between the base and the arm, and

Figure 6 shows a perspective view of a preferred embodiment of a reinforcement according to the invention before mounting it on the base.

The purpose of Figures 1-2 is thus to show how well the arrangement according to the invention is suitable for use in connection with all footwear intended for breakage goggles, which are provided with an outer part or extension associated with said footwear.

Thus, the footwear 1 according to Figs. that a ski shoe attached to a bandage (not shown in the drawing for simplicity) remains flexibly attached to the bandage. In practice, the material used to make this type of footwear must be flexible enough to allow flexible movement of the short sole protruding from the toe of the shoe. This part is subjected to strong and constantly repetitive stresses in the opposite direction, so a certain rigidity is required to ensure that the arm 5 is properly attached to the sole 2 and also to avoid detachment, especially in the toe part of the footwear. The arrangement according to the present invention completely compensates for such shortcomings, since the rim 7 contained in the front part of the base practically covers the end 5 'of the arm, as may be seen, for example, in Figure 2. In addition, this rim 7 is stiffened by a reinforcement 8 placed on the base tip 6. one part forms a corner rod 8 'with the general plane of the protruding part. This angle bar 8 'extends along the chest part of said rim 7, mechanically supporting the glued joint of the arm end 5', giving it good rigidity. The rivet 9 can still be set as shown in Fig. 1a to further support the connection between this arm and the sole, while maintaining the flexibility of the binding of the footwear.

The present invention will now be described by way of non-limiting footwear applications for cross-country skiing, shown schematically in Figures 3-5.

75980 s This footwear is designed in the usual way for the upper or upper with reference to drawings 10 and 11. This footwear is designed to work in conjunction with a tie fastening not shown in the drawings, the type of which is described in French Patent Publication No. 2,447,731.

As shown in Figure 3, the footwear includes a sole portion 12 made of a soft flexible plastic placed on the inner circumference of the shaft according to known technical methods. At its front toe 16 and almost along the longitudinal axis of the footwear, the sole 12 includes a toe rim 13 which extends over the arm 11, improving the strength of the larger glued joint surface.

The thickness of this rim 13 is sufficient to receive a reinforcement 14 placed on it, one part 14 'of which extends to the tip of said base, while its other part 14' 'is embedded in the material used to make the base 12. This reinforcement 14, shown in a perspective view in Fig. 6, preferably includes a fastening plate 15, one end of which is provided with an angle bar wing 15 'with a rectangular ring 17 extending at said tip to its sides up to the plane of the fastening plate 15. This ring 17 of circular cross-section can be connected to said fastening plate 15 in various ways, by welding, by means of bent fastening strips, etc. On the other hand, the wing bar 15 'of the corner bar rises approximately perpendicular to the plane of the plate 14 and stiffens the rim 13 at the apex of the base. The wing 15 'of this corner bar conforms in shape to the tip of the base, which can be seen in particular in Figure 4.

Thanks to this shape, the support of the footwear in the bandage is improved, thus making it possible to receive the stresses that occur repeatedly in the combination formed by the arm and the sole. This 75980 6 connection can further be made more efficient by means of a rivet 19 running across the bottom edge 13 through a hole in the wing 15 'wing 15' of the plate, while strengthening the connection between the bottom edge and the wall 21 at the tip 11 'of the shaft 11.

On the other hand, the reinforcement, the length of which runs along the bottom does not exceed the average length of the adult skier's big toe, also increases the sole's resistance to side and torsional stresses, also allowing better control of foot movements during cross-country skiing.

As a result, and also to improve the skier's skiing comfort without damaging the technical structure of the footwear, the fastening plate is made slightly upwardly concave so that its upper and lower surfaces 23 are approximately parallel to the sole connecting plane 12 '.

In addition, in order to increase the clamping force between the reinforcement and the base, the fastening plate is provided with holes 24 of different shapes, so that the material formed by the base could spread evenly around the fastening plate when it is cast in place.

It is clear that the use of the reinforcement is not limited only to the embodiment described above and that cast, forced, cold-formed and other reinforcements of the same piece can also be used within the scope of the invention. Likewise, the shape of the reinforcement formed by the angle bar may be different from that described above.

The invention has been described above by means of detailed examples. The rights reserved to the inventor by the inventor appear from the following claims.

Claims (5)

7 75980 A sole for sports footwear, in particular a ski boot for cross-country skiing, the toe part of which comprises at least a front edge covering the end of the arm, said toe being stiffened at least partially cast on said front edge and the sole plane , 15) associated with a vertical part (8 *, 15 ') which is trapezoidal in shape and whose long side is parallel to the plane of the base, characterized in that the reinforcement (8,14) is fixedly connected to the base (5,11) of the tip portion of the arm (5,11). 2.12) in the area above the thickness. The sole of a sports shoe according to claim 1, characterized in that in the middle of the vertical part (8 ', 15') there is a hole for a rivet, ring or similar fastening device. The sole of a fur footwear according to claim 1, characterized in that the length of the reinforcement (8, 14) cast on said sole is at most equal to the average length of the skier's big toe with a shoe number of 36-44. Sports foot sole according to one of Claims 1 to 3, characterized in that the reinforcement plate (8, 15) is slightly concave upwards. Sports foot sole according to one of Claims 1 to 4, characterized in that the stiffening reinforcement (14) comprises a single annular part (14 ') which extends beyond the front tip of the sole, acting in conjunction with binding fastening devices known per se.