FI58721B - REFERENCE TO A TREATMENT OF THE FARMING PROCEDURE - Google Patents

Description

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Patent · och registrstyrelsen '' AnaBkan utlajd oeh utl. * Krtfun publishederad 31.12.80 (32) (33) (31) Pyydetty atuolkwi — B «(lrd prloritet (71) Karhu-Titan Oy, Uudenmaankatu 2k A, 00120 Helsinki 12, Suomi-Finland (FI) (72) Juha Viljanen, Helsinki, Suomi-Finland (FI) (7 * 0 Forssin & Salomaa Oy (5h) Method in cross-country skiing and an accessory applying the method

The object of the cooking is a method in cross-country skiing to change its line of inclination (footability) in order to improve the grip of the ski.

The invention further relates to an accessory for cross-country skiing applying the method according to the present invention.

An important feature of cross-country skiing is the shape of the deflection line, ie the foot. It is characteristic of the operation of a foot ski that when the skis are sliding and the weight of the skier is distributed substantially equally between the two skis, the advantages of the ski sliding surface are carried by the rear parts with the center of the ski at least somewhat off the piste. When kicking, the entire sliding surface of the ski in question adheres to the track as the ski's deflection line straightens, assuming that the stiffness and footability of the ski have been chosen appropriately. This is especially important for the grip of the ski, in that ski holding creams and other components that increase the grip of the ski can then be placed in the holding area of the ski.

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In previously known cross-country skis, the effect of straightening the deflection line of a skier's kick has been based solely on a vertical force component on the ski, with part of the skier's weight and part of the parallel skier's effort. However, the disadvantage of the known skis has been that the changes in the ski deflection line described above have not been made possible in terms of the best possible operation of the ski and in particular its grip. Accordingly, it is an object of the invention to provide a method and an accessory applying this method or a part of the structural component of a cross-country ski which is essentially part of the structural design of a cross-country ski.

In order to achieve the above and later objects, the method of the invention is characterized in that the bending line of the ski is changed according to the rhythm of skiing by transferring part of the kicking force of the ski boot to a bending moment that straightens the ski bending line. The accessory according to the invention, in turn, is characterized in that the device comprises a substantially strip-like laminate or the like arranged on the upper surface of the ski or close to it, attached at one end to the ski and at the other end to the bandage or on the other side to the ski, and further comprising means for laminating or the corresponding tension is changed based on the effort of the ski boot.

The invention will now be described in detail with reference to some embodiments of the invention schematically shown in the figures of the accompanying drawing, to which, however, the invention is not intended to be limited.

Figure 1 is a schematic side view of a ski according to the invention, the leg of which has been somewhat exaggerated for the sake of clarity.

Fig. 2 shows a ski according to Fig. 1, respectively, in a situation in which the entire weight of the skier has been transferred to this ski and the skier performs a kick, whereby the ski straightens.

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Figure 3 shows schematically a side view of the structure of a ski provided with a device according to the invention.

Figure 4 shows a side view of a detail of a device according to the invention.

The cross-country ski ski 10a is in the form according to Fig. 1, e.g. when the weight of the skier is evenly distributed on both skis. In Figure 1, the footability of the ski is exaggerated. According to Fig. 2, the deflection line of the ski 10h is stretched and the entire sliding surface of the ski is pressed against the track.

This situation arises, for example, when the ski shoe 20b performs a kick that takes the skier forward.

According to Figures 1, 2, 3 and 4, a ski according to the invention comprises a bandage comprising a body part 12 fixedly connected to the ski and a vertically pivotable part 11 hinged thereto at the axis A, to which the ski boot is fastened at its front by some binding devices known per se. The figure does not show details of cross-country ski ties known per se, to which the invention is not directed.

In connection with the pivoting part 11 of the ski binding, special means are arranged by means of which the part 11 is transferred to the special transmission parts 14 which, when the skiing shoe 20 is tensioned and the part 11 is subjected to a rotation torque M about the axis A, transmits said force to correct the bending line. According to the figures, said power transmission elements 14 comprise strip-like, high-strength laminates arranged in connection with the upper surface of the ski. There are two of these laminates 14, namely the first 14 & which is in front of the bandage and the second 14b which is on the back of the bandage as shown in Figures 1-4. The first laminate 14a is fixed at its front end, e.g. with screws 16, to the upper surface of the ski, and the rear end of this laminate 14a is fixed to special members with which the torque is transferred. The second laminate 14b is fastened at its rear end, e.g. with screws 16, to the upper surface of the ski and at its front end to said torque transmitting members. An embodiment of these torque transmitting members is shown in Fig. 4, according to which a cylindrical part S * 4 58721 is fixed to the front of the hinge pivot part 11 with its hinge axis A, the rear side of which is fixed to the rear end of the first power transmission laminate 14a and to the axis A of said attachment point. on the side of the front end 14h of the second corresponding laminate.

When the part 11 pivots about its axis A, then the part 13 also pivots with it and according to the invention the laminates 14a and 14k are subjected to a tension tending to straighten the bending line of the ski. The markings in Fig. 4 have a torque M = 2 x F x b applied to the pivoting part 11 of the bandage. The invention is in no way limited to e.g. the torque transmission devices shown in Fig. 4. The invention can also be implemented, for example, in that the device according to the invention comprises a single unitary laminate attached at its front and rear ends to the ski and having a bandage substantially in the center and said transmission means, which may consist of e.g. eccentric devices arranged in connection with the hinge pivot 11, which tighten the laminate 14 as the part 11 turns.

The invention can advantageously also be implemented in such a way that the laminates 14 described above belong to the ski as ready-made structural parts per se. Said laminates are anchored at their ends to the top surface of the ski. The anchoring points of these laminates are determined by the desired deflection of the eus and the available force. As said, said fiber laminate can be adapted to pass, e.g. through an eccentric mechanism of a hinged ski bandage, so that the distance of the fiber laminate from the ski changes as the bandage is wound around its hinge. Another possibility is to anchor the fiber laminate at one end to the ski and at the other end to the bandage, the operation being the same as described above. For example, metals, glass fibers, aromatic polyamide fibers (KEYLAR), carbon fibers, or other similar high-strength fibers can be used in the laminate 14 or similar transmission member.

The invention is not limited to the embodiments described above by way of example only, and the various details of the invention may vary within the scope of the inventive idea defined by the following claims.

Claims (7)

A method for changing its deflection (footability) in a cross-country ski (10) to improve the grip of a ski (10), characterized in that the deflection of the ski (10) is changed according to the skiing rhythm by shifting part of ) as the bending moment. Method according to claim 1, characterized in that the moment of changing the deflection line of the ski (10) is produced by the rotation of the ski binding and the ski boot (20) attached to its tip, said rotation occurring substantially parallel to the sliding surface of the ski (10) and longitudinal about an axis perpendicular to it (A). Method according to Claim 1 or 2, characterized in that the deflection line of the ski (10) is adapted to change so that when kicking, the deflection line of the tensioning foot ski (10b) becomes substantially straight or even convex and the entire sliding surface of the ski is gripped. Method according to Claim 1, 2 or 3, characterized in that a special friction surface area, such as artificial fur, friction cream area or the like, is arranged in the central part of the sliding surface of the ski (10) and is brought into contact with the track when cyclically straightened. Device for carrying out a method for cross-country skiing according to claim 1, 2, 3 or 4, characterized in that the device comprises a substantially strip-like laminate (14) or the like arranged at or near the upper surface of the ski and attached at one end to the ski (ΐθ) and the other is accessed to the binding of the bandage or to the back of the bandage (10) and that the device further comprises means for changing the tension of the laminate (14) or the like based on the tensile force of the ski boot (20). 5,58721 Device according to Claim 3, characterized in that the device is integrated with the ski tie, such that the tie * 6 58721 comprises a part (12) fixedly connected to the ski (10) and a part (II) hinged thereto to which the ski boot (20) is attached at the front. and that means (13 »15)» are attached to the hinge (A) between said parts (11, 12) for changing the tension of said laminate (14) or the like. Auxiliary device according to claim 6, characterized in that in connection with said hinge there is a substantially cylindrical part (13) pivoting about the axis (A) with the turning of the ski shoe (20)> on opposite sides of which laminates (14) are attached. one of which (14a) is attached at one end to the ski (10) at the front of the bandage and the other (14¾) at the other end to the back of the bandage. r »\ *. 7,58721