WO1991009653A1

WO1991009653A1 - Ski

Info

Publication number: WO1991009653A1
Application number: PCT/AT1990/000125
Authority: WO
Inventors: Wolfgang Nussbaumer
Original assignee: Kästle Aktiengesellschaft
Priority date: 1989-12-22
Filing date: 1990-12-20
Publication date: 1991-07-11
Also published as: JPH04505872A; AT398380B; EP0460150A1; DE59009187D1; ATE123232T1; EP0460150B1; ATA292189A

Abstract

Described is a ski with light-alloy attachments (7) located over the overarch and sloping up in front of and behind the shoe support zone (9). The attachments are moulded, together with the other components of the ski or ski blank, from a preferably monobloc shell (8) made of plastic.

Description

ski

The invention relates in particular to a ski in which a blank ski, usually consisting of belt layers. Core, outsole and, where appropriate, steel edges, a top of its top and its side surfaces is molded from a preferably elastomeric plastic.

Such a construction for skis is known, the casing being usually molded in one piece onto the raw ski, in a form in which the raw ski is inserted, after which the material of the casing in the remaining, the shell corresponding mold cavity is introduced. A preferred embodiment of this process is the RIM (Reaction Injection Molding) process, by means of which polyurethane or its components, isocyanate and polyol, which are mixed with one another and with a dye in the spray head, are injected into the mold cavity. Usually pressures (in the mold cavity) of 2 to 15 bar are used. If, as is preferred, the result is to be an elastomeric polyurethane cover, this can be achieved by selecting and adjusting the components of the polyurethane.

The object of the invention is, in particular, to improve skis of the type mentioned at the outset, especially with regard to the mechanical-dynamic behavior of the ski.

The primary object of the invention is to optimize the bending characteristic of skis in such a way that harmful effects of the clamped ski boot on the bending line are largely avoided.

This is achieved according to the invention in that, in front of and behind the shoe stand area, upstanding attachment parts made of light material are arranged, which are glued to the layers of the ski underneath and possibly above them, the ski blank - at least from the core upwards - together with the top parts is formed together by the preferably one-piece plastic shell. The invention is based on the knowledge that, in particular, the bending behavior of the ski is also influenced by the boot clamped on the ski in the binding, in the sense of a stiffening in the middle region of the ski, the simply curved, smooth "theoretical""Bending characteristic of the ski alone (without a clamped shoe) more or less deformed by clamping the shoe in the middle of the ski, ie it contains a" stiffening hump "(FIG. 11). The measure according to the invention, as can be seen from the schematic representation of the bending characteristic in FIG. 12, now causes the apex region B ^{1 of} the bending characteristic (dashed line) of the ski to have a maximum BM in front of and behind the shoe standing region without a clamped shoe , but after clamping the shoe in the binding, these two maxi a practically disappear, that is to say they are bridged by an essentially smooth curved apex section B of the bending characteristic curve, whereby the bending characteristic curve also receives a balanced, curved, smooth course and is thus optimized.

Although ski constructions have already been proposed which have elevations in front of and behind the standing area of the shoe, these are not measures for optimizing the bending characteristic curve when the shoe is clamped in, and the structure is also not made up of attachment parts which have a common shell are preferably made of elastomeric plastic.

The vibration behavior, in particular the vibration damping, the torsion behavior, and the surface pressure distribution of the ski can also be influenced by the invention. A special damping effect of the encased attachment parts also lies in the fact that the transmission of the vibrations of the ski to the foot or leg of the skier is dampened, which enables skiing to be carried out without fatigue. In a preferred manner, the attachment parts are arranged over the top chord, especially if it is made of metal, and are attached to the top chord Covered directly or indirectly - ie with the interposition of one or more intermediate layers.

The attachments should have the lowest possible density, for example between 0.1 to 0.6 g / cm ³ . In particular foams, also foam-fiber composites or other light materials (light woods, honeycomb core materials) come into consideration. For example, closed-cell foams can be used for the foams, which has the advantage that the specifically heavier plastic material of the casing does not penetrate into the attachments. The penetration of the plastic material of the cover into the foam material of the cover can also be prevented in the case of open-cell or mixed-cell foam, if the surface of the add-on parts is painted or in some other way to ensure a closed outer skin. On the other hand, a certain penetration of the plastic material of the casing into the material of the attachment parts can be advantageous for the connection of the casing and attachment. Then open-cell or mixed-cell foams should be used without a closed outer skin.

As for the shape of the attachment parts, these expediently have a wedge shape that increases towards the center of the ski. In any case, it is expedient if the attachment parts including the cover material have an overall height that increases towards the center of the ski. However, this could also be achieved in the case of non-wedge-shaped attachment parts by merely varying (increasing) the thickness of the shell over the attachment parts in the direction of the center of the ski.

Parts of the ski binding can be connected to the front parts (or the shell sections thereof) on the end face (facing the shoe standing area) or can engage in the top parts. But you can also mount commercially available binding parts behind the front attachment part and in front of the rear attachment part on the shoe stand area.

Preferably in the rear of the ski, the top of the shell or a separate surface covering, in particular also have a longitudinal rib profile in the area of the attachment parts, which makes it possible to influence the torsional rigidity and the surface pressure distribution of the ski. These ribs act in the sense of increasing the torsional rigidity. As a result, a "softer" bending line can be selected with the same torsion. The result is that the stability of the bend is maintained while the ski is easier to turn. The ski accelerates excellently out of the curve. This effect also occurs on skis without additional attachments.

Furthermore, it is possible to mold utensils or boxes for utensils into the surface covering or, in the case of a ski of the type mentioned at the beginning, into the areas of the plastic cover forming the ski surface, or to insert (glue in) recesses in the cover. The utensils or the boxes or depressions therefor may also protrude into the attachment parts (i.e. if attachment parts are present). As utensils e.g. Consider: clock, thermometer, compass, lighting, reflector, avalanche search transmitter or receiver, data carrier for the control of ski lift access, valuables, keys, ski passes, altimeter etc.

The sheath is preferably made of an elastomeric plastic, e.g. Polyurethane, wherein the plastic of the casing is preferably molded onto the raw ski in accordance with the RIM process mentioned at the beginning. The entire shell of the ski can consist of a uniform plastic or zones of different plastics (multi-component coating), although the zones of different plastics are cohesively connected to one another.

The invention is explained below with reference to the drawings by an embodiment.

Fig. 1 shows a ski in side view or partially in section, Fig. 2 shows a plan view of the ski, Fig. 3 is a cross section according to III-III of Fig. 1, Fig. 4 to 6 show an attachment part for the rear ski in elevation (FIG. 4), in plan view (FIG. 5) and cross-section (FIG. 6), FIGS. 7 to 9 show an attachment part for the front ski in elevation (FIG. 7), in Top view (Fig. 8) and in cross-section (Fig. 9). 10 is 5 a cross-section according to XX of FIG. 1, FIG. 11 shows a schematic bending characteristic diagram of a ski with a non-optimized bending line. 12 uses a schematic bending characteristic diagram to illustrate the optimization of the bending line according to the invention.

10

The exemplary embodiment shown is an alpine ski which, as can be seen in particular from the cross sections according to FIGS. 3 and 10, consists of the following components: the upper flange 1 and the lower flange 2, e.g. from Leichtme

15 tall, the core with a central part 3 ', e.g. made of wood, and side parts 3 ", e.g. made of foam, the steel edges 4 and the outsole 5 as well as a leveling layer 6 between the outsole 5 and the lower flange 2 (which can also consist of load-bearing material, e.g. glass fiber laminate).

According to the invention, an attachment part 7 made of light material, e.g. made of foam. The individual components of the ski are glued together and form the raw ski, which is inserted into a mold and with a sleeve 8 made of elastomeric plastic, e.g. Polyurethane

25 is preferably formed using the RIM process. The individual components of the raw ski can be glued with the aid of adhesives and / or on the basis of the adhesion properties which the materials of individual components have in the processing state or by melting. Even between the material of the

30 Shell and the components of the raw ski appear surface adhesion or melting. In addition, the material of the casing can "mechanically" cling to the pores and recesses of the coated components.

3.5 As can be seen from Fig. 1, a wedge-shaped attachment part 7 ', 7 "is arranged in front of and behind the shoe stand area 9. An example of the shape of the attachment parts is shown in Figs. 4 to 9, in which the dimensions of Height, width and length are distorted. Ratio to the illustrated height of the attachment parts of, for example, 8 mm (rear attachment part 7 ', FIGS. 4 to 6) or, for example, 10 mm (front attachment part 7 ", FIGS. 7 to 9), the width is somewhat larger (rear attachment part 7 ^1, for example 58 mm, front attachment part 7 "(eg 55 mm) and the length can be considerably longer

(rear attachment part e.g. 230 mm, front attachment part e.g. 240 mm). With the rear attachment part 7 *, the width of the upper side decreases towards the center of the ski (with the same width of the base area of the attachment part), with the front attachment part 7 ", both the width of the upper side and the width of the base area towards the ski center decrease. The side faces and end faces of the attachment parts 7 ', 7 "are bevelled from top to bottom.

The sleeve 8 made of elastomeric plastic also encloses the

Attachment parts 7 ', 7 ". As can be seen from FIGS. 2 and 10, this cover 8 can have on the rear ski on its surface a rib profile consisting of a plurality of parallel, projecting ribs 10 running in the longitudinal direction of the ski, whereby the ribs 10 can also extend over envelope areas, below which there is an attachment part 7. The height and width of the ribs is of the order of a few millimeters. In the example shown (FIG. 2), the ribs 10 extend over a length about 20% of the ski length, other length or partial areas of the shell of the rear ski and / or front ski can also be equipped with a rib profile.

Furthermore, utensils or boxes for utensils can be molded into the shell 8, now preferably on the front ski, or recesses for receiving utensils or the boxes can be left out. These utensils, Bolzano or depressions are designated by 11 in FIGS. 1 and 2. The utensils or their boxes or the depressions can also protrude into the attachment part 7 ″ located under the sleeve 8. The depressions are lined with the plastic material of the sleeve 8.

In the exemplary embodiment shown, the attachment parts 7 and 7 ', 7 "are arranged above the top chord 1. This is the preferred embodiment, in which in particular the effect of optimizing the bending line is clearly pronounced. However, it would also be possible, especially if the upper belt is made from a fiber-plastic laminate (prepreg), the attachment parts under this upper belt, namely on the upper side of the core, but above all on the upper side of an intermediate belt arranged above the core to arrange.

Claims

Patent claims:

1. Ski, in which a shell made of preferably elastomeric plastic is molded onto a blank, usually consisting of belt layers, core, outsole and, where appropriate, steel edges, characterized in that that in front of and behind the shoe stand area are arranged attachment parts (7, 7 ', 7 ") made of light material that are integrated into the ski blank, whereby the ski blank - at least from the core upwards - together with the attachment parts together from the preferably one-piece cover ( 8) is molded from plastic.

2. Ski according to claim 1, characterized in that the attachment parts manufactured as separate components

(7,7 ', 7 ") are glued to the layers of the ski blank below and possibly above.

3. Ski, the load-bearing body consists essentially of belt layers and core, in particular according to claim 1 or 2, characterized in that the load-bearing ski body in front of and behind the shoe stand area compared to this towering, arranged above the top belt, integrated in the ski body , preferably with the upper chord directly or indirectly - with intermediate connection of at least one intermediate layer - has attached parts (7, 7 ', 7 ").

4. Ski according to one of claims 1 to 3, characterized ge indicates that the covered attachment parts (7 ', 7 ") have an increasing height towards the center of the ski.

5. Ski according to claim 4, characterized in that the attachment parts (7 ', 7 ") themselves at least partially have a wedge shape rising towards the center of the ski.

6. Ski according to claim 1 to 5, characterized in that the width of the attachment parts (7 ', 7 ") or at least the width of the top of the attachment parts decreases towards the center of the ski.

7. Ski according to one of claims 1 to 6, characterized ge indicates that the side surfaces and / or Stirn¬ surfaces of the attachment parts (7,7 ', 7 ") itself or the area surrounding the attachment parts of the shell (8) of diverge from top to bottom.

8. Ski according to one of claims 1 to 7, characterized ge indicates that the attachment parts (7,7 ', 7 ") mainly consist of foam.

9. Ski according to claim 7, characterized in that the foam is a foam fiber (in particular Glasfa¬ ser) composite.

10. Ski according to one of claims 1 to 9, characterized in that the attachment parts (7, 7 ', 7 ") at least primarily consist of a light material with a density of 0.1 to 0.6 g / cm ³ , preferably from 0.2 to 0.3 g / cm ³ .

11. Ski, the top of which is formed by a surface covering made of plastic, preferably on a blank of ski, usually consisting of layers of belt, core, outsole and, where appropriate, steel edges, on its top and its side surfaces, a shell of preferably ela - Stomer plastic is molded, in particular according to one of claims 1 to 9, characterized gekenn¬ characterized in that preferably in the rear part of the ski, the top of the shell (8) or the surface covering made of plastic, a rib section extending over a portion of the length of the ski from several in the longitudinal direction of the ski running ribs (10).

12. Ski according to claim 11, characterized in that the ribs (10) extend at least partially along hull areas which cover the attachment parts (7 ¹ ).

13. Ski, the top of which is formed by a surface covering made of plastic, preferably on a blank of ski, usually consisting of layers of belt, core, outsole and, where appropriate, steel edges, on its top and its side surfaces, a cover made of preferably ela - Stomer plastic is molded, in particular according to one of claims 1 to 11, characterized gekenn¬ characterized in that preferably in the front part of the ski in the shell (8) or the surface covering of plastic utensils or boxes for utensils molded or depressions are designed to hold utensils (11).

14. Ski according to claim 13, characterized in that the utensils or the utensil boxes or the depressions for this protrude into the attachment parts (7 ").

15. Ski, the upper side of which is formed by a surface covering made of plastic, preferably on a blank ski, usually consisting of belt layers, core, outsole and, if appropriate, steel edges, on its upper side and A cover made of preferably elastomeric plastic is molded onto the side surfaces, in particular according to one of claims 1 to 13, characterized in that the cover ( ^' 8) or the surface covering consists of different plastic zones, whereby the Zones of different plastics are cohesively interconnected.

16. A method for producing a ski according to one of claims 1 to 15, characterized in that the usually from belt layers (1,2), core (3 ', 3 "), outsole (5) and optionally steel edges (4) so¬ how raw skis consisting of attachment parts (7, 7 ', 7 ") are inserted into a mold, after which, after the mold has been closed, the plastic material or the components of the plastic material of the casing (8) may be under pressure in the remaining, the casing (8) Corresponding mold cavity is (are) introduced such that the plastic material of the sheath (8) both the top and side surface of the attachment parts (7, 7 ', 7 ") and the other areas of the top and side surfaces of the Encloses skis.