WO1990003205A1

WO1990003205A1 - Ski

Info

Publication number: WO1990003205A1
Application number: PCT/AT1989/000086
Authority: WO
Inventors: Bernhard Mayr
Original assignee: Head Sportgeräte Gesellschaft M.B.H. & Co. Ohg
Priority date: 1988-09-23
Filing date: 1989-09-21
Publication date: 1990-04-05
Also published as: ATA236288A; AT394811B; EP0394396A1; JPH03501457A; ATE80052T1; EP0394396B1

Abstract

A ski (1) has a running sole (2) and a hollow ski body (3) whose height normal to the running sole (2) varies along the length of the ski (1). The ski body is constructed as a hollow body (3) with mutually parallel side edges (4, 5) which run in the longitudinal direction of the ski. The width (B) of the ski body is less than or equal to the smallest width of the running sole (2) perpendicular to the longitudinal direction of the ski.

Description

ski

The invention relates to a ski with a tread part and a hollow ski body, the height of which, measured normal to the tread part, differs over the length of the ski.

A plastic ski has already become known from AT-PS 309 282, the upper flange and lower flange or its tread component and the surface component facing away from the tread have been connected to one another via longitudinal webs which are laterally offset from one another. In this way, a hollow ski body is formed, the height of the webs being able to be selected by appropriate shaping of the machining so that a different overall height of the entire ski is achieved in the longitudinal direction of the ski. In such known plastic skis, a separate shape had to be used for each ski type and for each ski waist in order to form the corresponding cavities after connecting the individual components in the ski core. In particular for the formation of special skis with different waists, such a formation of the hollow body with the respective side contour of the ski results in relatively difficult to control strength properties and relatively large fluctuations in the torsional behavior of the ski body.

The invention now aims to create a ski of the type mentioned in the introduction, in which the strength, elasticity and torsion properties can be defined more precisely over the length of the ski and can be kept largely independent of the waist of the ski. To achieve this object, the ski according to the invention essentially consists in that the ski body is designed as a hollow body with parallel side edges that run in the longitudinal direction of the ski, and that the width of the ski body less than or equal to the smallest width of the waisted tread part is measured transversely to the longitudinal direction of the ski. Because an essentially width-parallel ski body is designed as a hollow body, a defined and high torsional rigidity can be specified by simply specifying the respective height-width ratio. In particular, such a component can be used to set the most favorable width-height ratio, in particular in the end regions, namely the regions of the blade and of the ski end. The choice of such a wide parallel hollow body as the ski body now leads to the fact that, depending on the waist of the ski, the tread component projects differently laterally over the ski body. The tread component can be distinguished by relatively good transverse stiffness and, in particular, uniform transverse stiffness, and the fact that the tread component protrudes laterally over the ski body leads in particular to improved ice grip due to the narrow lateral contact surfaces when the ski is edged. For this purpose, however, it is necessary, as provided according to the invention, for the width of the ski body to be less than or equal to the smallest width of the waisted tread part measured transversely to the longitudinal direction of the ski.

The ski body or hollow body according to the invention can advantageously be designed as a shell body and closed on the side facing away from the tread part with an upper belt component. Even when such a hollow body is designed as a shell body, there are significant advantages in terms of production technology. In this embodiment, too, the width of the ski body, which remains constant over the entire length of the ski, can be maintained, since the upper belt does not have to protrude in any way over the lateral edges of the ski body. When the hollow body is designed as a shell body, a core made of extruded profiles, which are endlessly manufactured and length can be cut to length, the thickness contour can be milled onto the upper and / or lower shell.

Advantageously, the design according to the invention is developed in such a way that side surface components which are matched to the outer contour of the tread part and whose height corresponds to at least part of the height of the hollow body are connected to the side edges of the hollow body. Such side surface components attached to the side surfaces of the ski body for aesthetic or design reasons can easily be formed with a lower height than the height of the hollow body and can be formed, for example, over the entire length of the ski with a constant height. This in turn has significant advantages with regard to the grip on the ice, since the lateral contact surface can be kept constant over the entire length of the ski when the ski is edged, despite the different thickness of the ski. It is of major advantage that these lateral components do not in any way have to contribute to the stiffness or elasticity properties of the ski, since the torsional stiffness and the desired material properties are already defined in themselves by the dimensioning and design of the hollow ski body .

A further simplification in terms of production results when the design is such that the hollow body is designed to be divided in the longitudinal direction of the ski. With such designs, a modular system for skis with different side facades can be used in a simple manner. In order to facilitate the shaping of the hollow body when manufactured as a hollow body without a longitudinal seam or as a tubular hollow body, the design is advantageously made such that the side surfaces of the hollow body have an angle deviating from 90 ° with the tread plane. In principle, as has already been proposed for conventional skis, the hollow body can be designed as a single or multi-chamber construction. Fiber-reinforced thermoplastics or thermosets can be used in a particularly advantageous manner as the material for the torsion box. The subdivision of the hollow body in the longitudinal direction of the ski allows the different demands on the torsional properties in different partial areas of the ski to be taken into account in the longitudinal direction of the ski, and offers in particular the possibility of the middle area in a suitable manner for receiving bindings prepare to share. For this purpose, the formation is advantageously such that the central part of the ski has a partial region of the same height in the longitudinal direction, wherein ski binding parts and / or ski binding fastening parts can be integrated in the central part of the hollow body.

Above all, the possibility of using extruded, endlessly produced profiles offers in a particularly simple manner the possibility of designing such that the hollow body consists of a plurality of profiles or chambers running in the longitudinal direction.

A hollow ski body of this type can, moreover, achieve a weight reduction with simultaneously improved torsional rigidity and, above all, the required torsional rigidity in the end regions of the ski can be more precisely controlled and adjusted.

The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing. 1 shows a perspective view of a ski according to the invention; 2 to 7 cross sections through different embodiments of a ski according to the invention of Fig.l, with Fig. 2 to 7a) cross sections in the blade area, Fig. 2 to 7b) cross sections in the binding area and Fig. 2 to 7c) show cross-sections in the .End area of the ski, and Fig. 8 shows different embodiments of the side surface components adjoining the hollow ski body.

In FIG. 1, a ski is drawn with 1, which has a tread part 2 and a hollow ski body 3 extending over the length of the ski, the height of which is normal to the tread part 2 over the length of the ski, as shown in FIG 2 to 7 at the points designated a, b and c will be seen in more detail. The hollow ski body 3 has side edges or side cheeks 4 and 5 running parallel to one another in the longitudinal direction of the ski over the entire length of the ski, the width of the hollow body 3 being less than or equal to the smallest width of the tread part measured transversely to the longitudinal direction of the ski. In the case of a waisted ski, as shown in FIG. 1, the tread part 2 protrudes differently far below the hollow ski body 3 in different areas, as will also become clearer in FIGS. 2 to 7. For a suitable closure of the area in which the tread part 2 exceeds the width of the hollow ski body, side surface components 6 are provided which are of different widths according to the different width of the ski and whose height corresponds to at least part of the height of the hollow body 3, wherein different embodiments of such side surface components 6 are shown in detail in FIG. The blade of the ski 1 is designated 7. The hollow body 3 of different heights, formed with parallel side edges 4, 5 running in the longitudinal direction of the ski, can either be continuous over the entire length of the ski or, as indicated in FIG. 1, be divisible in the central region transversely to the longitudinal axis of the ski 1 , wherein the center region of the hollow ski body designated by 8 has the same height having. The division of the hollow ski body 3 into a central region 8, an end region 9 and a front region 10, which is indicated in FIG. 1, allows the torsion or rigidity properties of the ski to be taken better into account. Furthermore, ski binding parts and / or ski binding fastening parts can be integrated in the middle part 8 of the hollow body, which are not shown in FIG. 1 for the sake of clarity.

FIGS. 2 to 7 each show a cross section through the central region 8, the end region 9 and the front region 10 of the hollow ski body 3 at the points in FIG. 1 labeled a, b and c. The tread part is designated 2 in each case and can consist of one or more layers. Edges 11 are integrated as usual on the side edges of the tread part 2. As can be seen from FIGS. 2 to 7, the width B of the ski body is in each case the same size over the entire ski length and in each case smaller or at most equal to the smallest width of the tread part 2. Furthermore, it is evident that the height H of the ski body 3 is designed differently on the tread part 2 in different areas along the length of the ski, the hollow area having the greatest height in the middle area 8 and tapering towards the end of the ski or the area of the shovel. A cover surface or an upper flange 12 can be provided on the hollow ski body, as shown in FIGS. 2 and 3. 2 to 7, side surface components adjoining the hollow body 3 and adapted to the outer contour of the tread part were not shown, reference being made to FIG. 8 for the formation of such side surface components.

In the embodiment of FIG. 2, the hollow body is formed by a hollow body construction 14 consisting of four chambers 13, each of which is normal to the tread part 2 standing webs 15 have different heights in different areas along the longitudinal direction of the ski. 3, a hollow body construction 16 with a single chamber is used. The hollow body constructions according to FIGS. 2 and 3 are formed like a hose without a longitudinal seam and are made in a known manner with the tread part 2 by gluing or the like. connected.

4, a two-chamber shell construction is used for the hollow body 3, the lower shell part 17 being designed in a double U-shape, the webs 18 of which run normally on the tread layer 2 have different heights. The upper shell part 19 is flat and has grooves 20 for positive locking of the lower shell part 17 to the upper shell part 19.

In the single-chamber shell construction shown in FIG. 5, the upper shell part 21 has a U-shape, with webs 22 which are designed differently according to the height of the hollow body. The lower shell part 23 is in each case parallel to the width and with grooves or stepped areas 24 for a positive fit Gluing the two shell parts together.

In the two-chamber shell construction shown in FIG. 6, the upper shell part 25 has a double U-shape with webs 26 of different lengths, while the lower shell part 27 extends over the entire width of the ski and has longitudinal grooves or longitudinal recesses 28 for it positive interlocking of the webs 26 are provided.

A shell construction similar to the structure of FIG. 5 is shown in FIG. 7, the upper shell part 29 having a fourfold U-shape for a four-chamber shell construction with different lengths, normal to the tread 2 Web 30 shown, the lower shell part 31 is again formed parallel to the width and is formed with grooves or longitudinal recesses 32 for a positive connection of the webs 30 of the upper shell part with the lower shell part.

FIGS. 8a to 8d show different variants of side surface components 6 for the lateral covering of the tread part 2 protruding under the hollow ski body 3 with a constant width. The embodiments of the side surface components 6 shown in FIGS. 8a and c have a constant height over the entire length of the ski, which is less than or at most equal to the lowest height of the hollow ski body 3 having different heights, while the width corresponds to the difference between the width of the tread part 2 and the width of the hollow body 3 is different. 8a has an essentially rectangular cross-section, in the embodiment according to FIG. 8c an area 33 which is bevelled to the outside is provided. In the embodiment according to FIGS. 8b and d, as in the embodiments in FIGS. 8a and 8c, the width of the side surface components 6 is again designed in accordance with the difference between the width of the tread part 2 and the width of the hollow body 3, in which case the height of the side surface component 6 is also adapted to the height of the hollow body 3 which is different in the longitudinal direction of the ski. Analogously to FIG. 8a, the side surface component 6 of FIG. 8b is essentially rectangular, while in the embodiment according to FIG. 6d a beveled area 33 is again provided on the outer edge.

Claims

Claims:

1. Ski (1) with a tread part (2) and a hollow ski body (3), the height of which is normal to the tread part (2)

5 measured over the length of the ski is different, characterized in that the ski body as a hollow body (14; 16; 17, 19; 21,23; 25; 21; 29; 31) with mutually parallel side edges running in the longitudinal direction of the ski ( 4,5; 14,15) and that the width (8) of the ski body is smaller or

10 is equal to the smallest width of the waisted running surface part (2) measured transversely to the longitudinal direction of the ski.

2. Ski according to claim 1, characterized in that the hollow body is designed as a shell body and is closed on the side facing away from the 15 tread part (2) with an upper belt component.

3. Ski according to claim 1 or 2, characterized in that on the side edges (4,5) of the hollow body (14; 16; 17,19; 21,23; 20 25,21; 29,31) on the outer contour of the tread part (2) adapted side surface components (6, 33) are connected, the height of which corresponds to at least part of the height of the hollow body.

25 4. Ski according to one of claims 1, 2 or 3, characterized ge indicates that the side surfaces of the hollow body with the tread plane (2) have an angle deviating from 90 °.

30 5. Ski according to one of claims 1 to 4, characterized gekenn¬ characterized in that the hollow body (14; 17,19; 25,27; 29,31) is formed divided in the longitudinal direction of the skis (1).

6. Ski according to one of claims 1 to 5, characterized in that in the longitudinal direction the central part of the ski (1) has a partial area (8) of the same height.

7. Ski according to claim 6, characterized in that ski binding parts and / or ski binding fastening parts are integrated in the central part (8) of the hollow body.

8. Ski according to one of claims 1 to 7, characterized gekenn¬ characterized in that the hollow body (14; 17,19; 21,23; 25,27; 29,31) consists of a plurality of profiles or chambers extending in the longitudinal direction .