JPH0137958B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements to skis.

Traditionally, skis have been made of wood, FPR, metal/glass, etc.

In ancient times, wooden skis were often made with raised tops to maintain strength, but because they were heavy, had poor maneuverability, and lacked bending rigidity, flat skis gradually became used. Moreover, they have been replaced by high-performance skis made of FPR and metal. Nowadays, skis have a double-tapered shape in which the thickness gradually increases from the tip to the center, and gradually becomes thinner from the center to the rear end, and the top surface is flat. Skis are becoming popular. As for the structure, there are known structures such as a sandwich structure in which reinforcing members such as FRP boards are arranged on the upper and lower surfaces of the core material, and a box structure in which reinforcing members are arranged around the entire circumference of the core material.

These structures are generally adopted by ski manufacturers because the manufacturing process is easy when manufacturing skis.

However, when considering skis from the perspective of physical properties, it is extremely important to design a ski with a well-balanced arrangement of properties that influence each other, such as torsional strength, bending strength, vibration damping, and air resistance. It was a difficult problem.

For example, if you improve the torsional strength of skis,
The bending strength is increased, resulting in a ski with a stiff waist, and the vibration damping performance is also reduced, which has a negative effect on skiing performance.

In addition, in order to reduce the air resistance of skis while skiing, we have made holes of arbitrary shapes in the shovel at the tip of the ski, and made the rise of the shovel low to reduce air resistance as much as possible. Efforts have been made to suppress this and increase the speed during sliding, but these methods have the disadvantage that the manufacturing process is labor-intensive and increases the manufacturing cost.

Therefore, it is desired to develop skis that have soft elasticity, high torsional strength, good vibration damping properties, and low air resistance by combining materials with various characteristics. Although research and development is being carried out, a satisfactory ski has not yet been provided.

In view of these conventional drawbacks, the present invention takes as a reference the raised structure on the upper side of old wooden skis, and changes the upper surface shape of the ski from the conventional flat plate shape to a roof-like shape that swells upwards. The purpose of this design is to improve various properties of skis such as rigidity, torsional strength, vibration damping properties, and air resistance by forming protrusions, thereby providing skis with good glide performance. be.

Embodiments of the present invention will be described based on the drawings.

Example 1 Cutout part 2 of arbitrary shape on upper surface component 1 of ski
A roof-shaped member 5 consisting of a top member 3, a reinforcing member 4, etc. formed separately in the cut-out portion is filled with a core material 6 of an arbitrary material, and is fitted and fixed to form the top component 1.
This ski is characterized by having a roof-shaped protrusion formed on the top.

Example 2 This is a ski board filled with metal fibers or other fibers as the optional core material 6 in the above example.

Example 3 This is a ski in which non-coagulable mucus (for example, glycerin) or non-coagulable powder (for example, silica gel) is interposed between metal fibers and other fibers as the optional core material 6 in the above embodiments.

Since the ski of the present invention is constructed as described above, the reinforcing member 4 constituting the roof-shaped member 5 may be made of, for example, carbon fiber, glass fiber, boron fiber, silicon carbide fiber, alumina fiber, or aramid fiber. Fiber-reinforced plastic materials made of fibers, steel fibers, and other arbitrary fibers, aluminum alloys, titanium alloys, and other metal materials, fiber-reinforced thermoplastics, engineering plastics, and other materials may be used alone or Can be used in combination. Therefore, by changing the material of the reinforcing member 4, the individual characteristics required of the ski itself (torsional strength, bending strength, vibration damping properties, etc.) can be adjusted freely, making it suitable for beginners, intermediate and advanced skiers. It is possible to supply skis with performance suitable for competitive athletes and skiers of all levels, and the degree of freedom in ski design is dramatically increased. In addition, in the ski of the present invention, the ski body is formed in advance based on design standards, and for example, a glass fiber reinforced plastic board (hereinafter abbreviated as GERP board) is used for the upper surface component 1, and the roof is The reinforcing member 4 of the shaped member 5 is made of carbon fiber reinforced plastic plate (hereinafter referred to as
Abbreviated as CFRP board. ) by using
The upper surface component 1 of the GERP board is flexible and has relatively low rigidity, but the roof-shaped member 5 having the reinforcing member 4 made of CFRP board has high rigidity and strong torsional strength, so these are combined. With this structure, it is possible to provide a ski with high torsional rigidity in the roof-shaped member 5 and flexibility in other parts, which is a feature not found in conventional skis.

In particular, unlike conventional flat skis, a roof-shaped protrusion is formed on the upper surface component 1, so that air flows along the protrusion during skiing, resulting in good directivity of the ski. At the same time, it has the effect of preventing the tip of the ski from lifting up, further improving skiing speed and maneuverability.

Further, when separately molding the roof-shaped member 5 used in the ski of the present invention, as shown in FIGS. Therefore, if a polyurethane elastomer foam material is used for the core material 6, the vibration damping properties of the ski itself will be extremely good. In addition, if metal fibers or other fibers are used alone as the core material 6, or if non-condensing mucilage or non-condensing powder is interposed in the fibers, the fibers will rub against each other due to the vibrations of the ski during skiing, generating thermal energy. Because the skis dampen vibrations, the skis follow the snow surface better, resulting in significantly improved glide performance and maneuverability.

For reference, an example of a method for fitting and fixing the roof-shaped member 5 to the cutout 2 of the upper surface component 1 is as shown in FIGS. 3 and 5. A method of forming and fixing the upper surface member 3 by providing a step part in the step part 2 and fitting the end part to the step part, as shown in FIGS. 4 and 6, cutting the upper surface component 1. As shown in FIGS. 7 and 8, there is a method of forming a reinforcing member 4 such that the end portion fits into the stepped portion 2 and fixing the reinforcing member 4 to the stepped portion, as shown in FIGS. 7 and 8. There is a method of molding the upper surface member 3 and reinforcing member 4 of the same shape as the cut-out part 2, and fitting and fixing them, and as shown in FIGS. There is a method in which the roof-shaped member 5 is molded onto a flat plate that matches the cutout and is fitted and fixed thereto. In this case, if an aluminum alloy, titanium alloy, or other metal plate is used as the flat plate that matches the cutout, it is possible to press-form the roof-shaped member 5, and it is also possible to use a GERP plate, CFRP plate, etc. Each can be molded extremely easily with a mold.

Note that the shape of the roof-shaped member 5 of the present invention may optionally be an arch shape or a trapezoid shape as shown in FIGS. 11 and 12. Arched or trapezoidal shapes not only improve the torsional rigidity and bending strength of the ski itself, but arched shapes are particularly effective in preventing snow buildup, and trapezoidal shapes improve vibration damping. This was revealed as a result of the test.

In addition, the cut-out portion 2 and the roof-shaped member 5 of the ski top component 1 according to the present invention are arranged either before or after the fastener attachment area, or at the front or rear, and their length and shape are determined according to the requirements of the ski. They can be freely selected according to the characteristics of the skier, and have the advantage of being able to supply skis designed to match the skill of the skier.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a ski according to the present invention. FIG. 2 is a perspective view showing the fitted state of the upper surface component of the ski and the roof-shaped protruding member. Third
4, 7, and 9 are cross-sectional views illustrating the fitted and fixed state of the upper surface component of the ski and the roof-shaped member according to the present invention. FIG. 5, FIG. 6, and FIG. 8 are perspective cross-sectional views of essential parts of the ski according to the present invention. FIG. 9 is a perspective view showing a fitted state between an upper surface component and a roof-shaped member showing another embodiment of the present invention. FIG. 10 is a cross-sectional perspective view of a main part of the ski according to the embodiment shown in FIG. 11 and 12 are perspective cross-sectional views of essential parts of skis according to other embodiments of the present invention. 1... Upper component of ski, 2... Resection part,
3... Upper surface member, 4... Reinforcement member, 5... Roof shaped member, 6... Core material of arbitrary material.

Claims (1)

[Scope of Claims] 1. A cut-out portion of an arbitrary shape is provided in the ski upper surface component, and a core material of an arbitrary material is filled in the roof-shaped member formed of a separately molded upper surface member and a reinforcing member in the cut-out portion. A ski board characterized in that a roof-shaped protrusion is formed on the upper surface component by being fitted and fixed. 2 The cross section of the roof-shaped member is chevron-shaped, arch-shaped,
The first claim is a trapezoid or similar to these.
Skis as described in section. 3. The ski according to claim 1 or 2, wherein the optional core material is a synthetic resin foam material. 4. The ski according to any one of claims 1 to 3, wherein the optional core material is a metal fiber or other fiber. 5. The core material of any material is metal fiber or other fiber,
A ski according to any one of claims 1 to 4, which has non-condensing mucus interposed therein. 6. The core material of any material is defined in claim 1, in which a non-coagulating powder is interposed in other fibers of the metal fiber.
6. The ski according to any one of items 5 to 5. 7 The roof-shaped protrusion formed on the upper surface component is
The ski according to any one of claims 1 to 6, which is formed either at the front or rear of the ski fastener attachment area, or at the front or rear.