JPS649032B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ski, and in particular to a ski of composite construction, in which the core is sandwiched between upper and lower structural members forming flanges, cords or plate members; The sides are hardened between a pair of cheeks, and the ski's running surface is bounded by a pair of metal edges.

Recently, the development of composite ski structures has gained importance because composite construction technology can improve the performance of skis such as strength, flexibility, elasticity, vibration damping properties, and torsional properties at the construction stage. This is because it becomes possible to change the .

Thus, a composite ski structure according to the invention includes a plate, sheet or foil or other thin layer forming the running surface or bottom of the ski. A pair of metal profiles, such as angle pieces, commonly referred to as edges or edge pieces, are disposed along and generally in the same plane as the longitudinal edges of the ski that laterally stiffen the sole. Similar to the terminology related to the girder structure, the structural member forming the bottom structure of a ski is called the lower cord or flange, and generally has a plate-like form, to which a thin layer of running surface is glued or fixed. ,
The edge material is fixed equally to it.

The center of the ski has or forms a core, which is composed of an elastic or deformable material, such as a foamed synthetic resin, and which is actually formed between the upper and lower cords or flanges and the side walls of the ski. A foamed synthetic resin may be used within the cavity formed by the edging, said transverse walls extending along the longitudinal sides above the edge and terminating at the cheek of the ski.

One or more intermediate structural members, cords or flanges are provided between the upper and lower flanges or members. The flanges of a ski are generally approximately coextensive, that is, approximately congruent in a geometric sense when stacked, and generally extend over their entire length from the tip to the rear end of the ski and are bonded to all other parts. Ru.

It is known to provide the upper and lower flanges as a laminated structure, ie as a component consisting of two layers, where the layers are generally made of different materials, such as aluminum and synthetic resin.

This laminated structure is a combination of such different materials in a composite flange, giving the structure and the ski significant advantages and mechanical properties due to the nature of the materials used. In fact, the important factors are
Torsional resistance, flexibility, tensile strength, fracture resistance and vibration damping properties. Thus, the strength is provided by the aluminum layer and the damping properties are taken care of by the synthetic resin layer. Laminated flange structures of the above type are expensive to manufacture and use expensive materials.

The assignee of the present application has developed a ski that includes the use of straps as the upper and lower flanges of the ski without entering the realm of public use or becoming prior art. However, such flanges have had to improve their dimensional changes as a result of temperature changes, uncontrollable warping and twisting characteristics, clearly due to their asymmetrical shape.

It is therefore an object of the invention to provide a ski which eliminates the above-mentioned disadvantages.

A more particular object of the present invention is to provide a composite ski in which the advantages of upper and lower flanges or cords of two different materials are obtained without the expense and other disadvantages of conventional systems.

Yet another object of the present invention is to provide a composite ski structure that does not have the thermal and warping characteristics of conventional systems.

These objects and others, which will become apparent from the following description, are achieved in a composite ski of the above type according to the invention, in which the upper and lower flanges or cords are made of two different materials, such as aluminum and synthetic resin, respectively. consisting of different materials, parts of these different materials being coextensive in the case of each flange or cord, and each flange or cord itself passing through the ski relative to the longitudinal axis of the ski and perpendicular to the flange; being particularly symmetrical about the longitudinal intermediate plane, the upper and lower flanges or cords are coextensive and have their parts consisting of two different materials, one flange and the other substantially compatible;
That is, the boundaries of the respective parts of different materials overlap exactly in plan, and these parts of the two flanges are constructed interchangeably of different materials,
That is, it is configured such that a portion of one flange of one material corresponds to a portion of the other flange of another material, and vice versa. Otherwise, if the outer part of one flange or cord is made of one material and its inner part of another material, the outer part of the other flange
The inner part of the second flange is made of another material and consists of the first mentioned material.

Preferably, each flange portion has the shape of a continuous strip, including the spacing between the strips, the strips extending generally around the ski in addition to their outer boundaries generally formed by the cheek of the ski. It has an inner boundary that runs diagonally. For example, in this embodiment, the flange includes two separate strips that increase in cross-section toward approximately the center of the ski and two tapered sections from opposite ends of the ski toward approximately the center of the ski. Contains two inner strips. The two inner straps end short of the center of the ski and have a length approximately half the length of the ski.

According to another embodiment of the invention, the strip is formed by mutually parallel rectangular borders. in this case,
Because the flanges consist of strips of approximately equal width or the same configuration, and strips of different materials and properties can be exchanged or substituted during assembly of the ski, different properties can be achieved at any particular time along the assembly line. The ski can of course be provided with an interchangeable construction of the two flanges of a particular ski.

The selection of different types of materials for the strips of each flange ensures that the properties of the ski are satisfied in all cases, and that the two types of materials making up each flange each have approximately half the material of each flange. implemented within the stated limits to ensure that the Of course, the contour of the strap determines the properties of the ski, and this can be varied as required.

One of the key advantages of the present invention is that the two different materials that make up the composite upper or lower flange do not need to extend over the entire area of the flange or the entire horizontal portion of the ski. Considerable material savings can be obtained during manufacturing. However, in addition, the modification can be introduced in the form of a strip of two materials constituting the flange, without reducing the quality of the ski, so that another control can be obtained to obtain the ski properties. Assembling the skis is also easier.

The above and other objects, aspects, and advantages of the present invention will be easily understood from the following description with reference to the drawings.

As is clear from FIGS. 1 to 5, the composite ski according to the invention comprises a normal running surface or bottom surface 1 of the ski, which surface can be used as a low-friction laminate or sheet or by itself. It is constructed as a plate member laminated to a support member and is flanked by a pair of ordinary metal edges or edge members 2 and 3. The assemblies 1, 2, 3 are glued or attached to the lower structural member, flange or cord 5 of the ski and include a pair of cheeks 7 on the lower flange 5 along the longitudinal sides of the ski.
and 8 rise, the cheeks of which are in the form of a strip and border the lower cord 5 and the upper structural member, cord or flange 4, and a cavity 6 for receiving the core of the ski. This core material is a common core material used for this purpose, and for example, a foamed synthetic resin material such as polyurethane foam can be used.

The upper member 4 may be foamed directly onto the upper surface of the ski or may be provided with a low friction finished metal foil or laminate 4a glued to the flange 4.

An intermediate flange or structural member is provided between the upper and lower flanges or members, although this member is optional and is not shown.

As is clear from FIGS. 1 to 5, the upper flange 4 and the lower flange 5 are exactly congruent, i.e. when superimposed they occupy the same extent and are made of strips which themselves correspond to the corresponding strips of the other flange. coextensive with and similarly congruent with the wood.

The upper flange has three strips 41, 42, 43
, of which strips 41 and 43 are referred to as "outer strips" and strip 42 is referred to as "inner strip." Along the boundaries 41' and 43' of the strips 41 and 43 these strips merge with the strip 42, so that all the strips of one flange lie in the same plane. The strip of lower flange 5 is similar to that described above. From FIG. 4, it can be seen that each flange is itself symmetrical about the longitudinal axis LA of the ski, ie mirror symmetrical about the longitudinal midplane LMP through the ski (FIG. 2). These strips consist of different materials at each flange, for example aluminum and glass fiber reinforced synthetic resin, such as glass fiber reinforced epoxy resin. Glass fiber reinforced epoxy resin can be used for the plate member 1 as well as the cheeks 7 and 8. When the upper flange 4 has its outer bands 41 and 43 made of aluminum, the inner band 42 is made of glass fiber plastic and correspondingly the outer bands 51 and 53 for the lower flange 5. are made of the same glass fiber synthetic resin and the inner strip 52 is made of the same aluminum alloy.

The two flanges have the same contour, i.e. determined by the configuration of the ski and in most cases the contours do not exactly converge, but extend downwards, as shown in FIGS. 1 and 2. Preferably, the flange is somewhat wider than the upper flange so that the flanges are geometrically similar. In this case, as shown in the figure, cheek parts 7 and 8
are somewhat thinner in their upper parts than in their lower parts.

The flanges of the ski are made by cutting aluminum sheets or plates into strips and similarly reinforcing glass fiber-reinforced synthetic resin plates so that these parts fit together. Therefore, by cutting in this way,
It is also possible to form a replacement part for the other flange.

However, when it is desired to reinforce the tip of the ski, a portion of the upper flange, i.e. the inner member 42 of the flange made of fiberglass plastic, is cut out and replaced with a correspondingly shaped part of aluminum. , or simply reinforced with aluminum parts.

As is clear from FIGS. 4 and 5, the inner strip 42 or 52 has a tapered shape from each end to a central area, and the outer strips 41, 43 and 51, 52
become wider from their opposite ends toward the central area. In FIGS. 6 and 7, the upper and lower flanges 4a and 5a have corresponding configurations and are made of strips 41a-- of different materials as described above.
43a, and 51a to 53a, the dividing line between these strips generally has a straight portion,
These portions include obtuse angles to each other in contrast to the generally continuous curved lines of the embodiments of FIGS. 4 and 5.

Figures 8-13 show an alternative configuration in which the upper and lower flanges are numbered with similar numbers and their strips are numbered accordingly. In FIGS. 8 and 9, the boundaries of the curved lines of the strips 41b, 43b and 51b, 53b touch each other, so the inner strips 42b and 5
2b is in each case divided into two strips. In FIG. 10 and FIG. 11, the band material 41c
Similar divisions exist at the vertices formed by straight line segments delimiting ~43c and 51c~53c. These line segments are shown in Figures 12 and 13.
The upper and lower flanges 4d to 43d and 41d and 5 are located diagonally in the figure and the boundaries are parallel, so that the parallel strips extend the entire length of the ski.
Formed for 3d.

14 to 16, the upper flange 4
e comprises two outer bands 41e and 43e of aluminum tapering towards a central area, while the inner band consists of two parts 42e of glass fiber synthetic resin.
and 44e.

As an alternative form of FIG. 16, the inner band material 52e,
54e is made of aluminum and the outer strip 51
e and 53e are made from glass fiber reinforced synthetic resin.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view taken along the line - of FIG. 4 through a ski of an embodiment of the invention, and FIG.
3 is a cross-sectional view of another part of the same scale taken along the line - of FIG. 4; FIG. 4 is a section through the upper flange or cord of the ski; FIG.
Sectional view taken along the line - of Fig. 1, No. 5
Figure 6 is a sectional view taken along the line of Figure 1 through the lower cord or flange of the ski;
7 and 7 are diagrams showing the arrangement of the strips of the upper and lower cords of skis according to other embodiments of the invention, FIGS. 8 and 9, FIGS. 10 and 11, and 12.
13 and 13 respectively show the contours of the upper and lower cords or flanges of three alternative embodiments of the ski according to the invention, and FIG. 14 shows a sectional view taken generally along the line of the ski. , a part of which is shown in outline in Fig. 15, and Fig. 15 and Fig. 1.
6 shows cross-sectional views taken along the lines - and - of FIG. 14, respectively. Symbols in the diagram: 1...Bottom surface, 2, 3...Edge material, 4...Upper flange, 5...Lower flange,
6...Cavity, 7,8...Cheek, 41,43...
Outer band material, 42... Inner band material, 51, 53... Outer band material, 52... Inner band material, 4a... Upper flange, 5a... Upper flange, 41b, 43b...
Outer band material, 51b, 53b...Outer band material, 42b
...Inner band material, 52b...Inner band material, 41c, 4
3c...outer band material, 42c...inner band material, 4d...
...Upper flange, 41d, 43d...Outer band material,
42d...Inner band material, 5d...Upper flange, 5
1d, 53d...Outer band material, 52d...Inner band material, 4e...Upper flange, 41e, 43e...
Outer flange, 42e... Inner band material, 5e... Upper flange, 51e, 53e... Outer band material, 52
e...Indicates inner band material.

Claims (1)

[Scope of Claims] 1. A main body having a sliding surface having a longitudinal axis and having side surfaces formed by a pair of metal edges; a lower flange provided above the sliding surface; and a spaced apart arrangement above the lower flange. an upper flange with the proviso that each of said lower and upper flanges is
a plurality of strips that are geometrically similar to each other and made of two different materials and arranged in the same plane, the strips having corresponding strips that are geometrically similar to each other; Furthermore, the strip of one of the lower and upper flanges is symmetrical about the longitudinal axis and is constructed of one of the materials, while the strip of one of the lower and upper flanges is constructed of the remaining one of the materials. By corresponding to the other said strip of the flange, the material of the said strip is interchangeable between the lower and upper flanges, the strip comprising:
a pair of outer bands and at least one inner band disposed between the outer bands, the outer and inner bands being defined by a border; and a pair of cheeks extending along both axial sides and cooperating with the lower and upper flanges to form a cavity for accommodating the core material; A ski characterized in that the inner band material is formed to become tapered toward the center portion, and the inner band material is formed to become tapered toward the center portion. 2. The ski according to claim 1, wherein the different materials are aluminum and synthetic resin. 3. Claim 1, characterized in that the strips of each flange are continuous with each other along the boundary line.
Skis listed in section. 4. The ski according to claim 3, wherein the boundary line is continuously curved. 5. Ski according to claim 3, characterized in that the boundary line forms a right angle. 6. The ski of claim 6, wherein said inner strip extends from each end toward said central portion and has a tapered shape toward said central portion. 7. A ski according to claim 7, characterized in that the outer straps meet at the central portion. 8. The ski according to claim 7, wherein the boundary line is curved. 9. Ski according to claim 7, characterized in that the boundary line forms a right angle. 10. Claim 10, wherein the boundary line extends generally along the diagonal of the ski.
Skis listed in section. 11. Claim 1, characterized in that the strips of each flange are formed between parallel boundary lines.
Skis listed in section. 12. Ski according to claim 12, characterized in that said parallel lines extend parallel to said axis. 13. The ski according to claim 1, wherein one of the materials is a glass fiber reinforced synthetic resin.