JPS63111891A - Ski board - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention strengthens the properties required for the arch bend part (camber part) and maintains a long life without deteriorating the necessary properties even after long-term use. The aim is to provide skis that are comfortable.

[Prior Art] As shown in FIG. 1, the entire ski 1 is curved in an arch shape (arch bend), and a convexly curved arch bend boss is formed in the central portion. In actual skiing, a turn is performed by applying a load to this arch bend part 2, bending the board, and digging the edge into the snow surface as shown in Figure 2. It has a great influence on the operability of skis and is a factor that determines its durability.

This arch bend part? The structure of the ski has various designs depending on the intended use of the ski (e.g. competition, tour use, etc.), but what they have in common is a top sheet made of a hard plastic ring such as ABS resin. Polyethylene sliding surface (
These are steel edges that are flush with the sole (or base) and the gliding surface and slightly protrude from the sides, giving the structure of the core that is surrounded by them each a unique feature.

These internal structures can be roughly divided into laminate structures,
It can be a form core structure or a torsion box structure, but if these are summarized and expressed schematically, the third
~It will look like Figure 4. Therefore, FIG. 3 shows the top sheet 11,
A structure in which a core 5 made of hard polyurethane foam, laminated wood, etc. is sandwiched between Zicral metal 16 and attached to the inner surface surrounded by the sliding surface 12, sidewalls 13, and edges 14, FIG. 4 shows the inside of the surrounding area. The figure shows a structure in which a core I5 is sandwiched between high-metal metals 17 and surrounded by a glass fiber box I8.

[Try to solve the problem 1] By the way, conventional skis that use metal or glass fiber to reinforce the core become fatigued after 2 to 3 years of use, reduce arch bend, weaken elasticity, and cause skis to become stiffer. The repulsive force of will decrease.

This phenomenon has a large negative impact on the maneuverability of skis, especially when turning, and is a factor that determines the lifespan of skis.

In addition, the flex properties (flexibility), torsion properties (torsional strength), response properties (return properties), and pibration damping properties (vibration absorption properties) necessary for skis have also improved, making the skis easier to operate. is deteriorating.

The present invention aims to provide a ski that is extremely unlikely to experience fatigue at the arch bend, which is a disadvantage of conventional skis, and that can maintain a long service life without reducing operability over a long period of time. It is.

[Means for solving the problem of slippage points] In order to achieve the above object, the present invention uses a shape memory alloy S between the surface sheet 11 and the sliding surface 12 of at least the arch bend portion λ of the ski. This is a characteristic feature.

Shape memory alloys are metals that have superelasticity as well as shape memory effects due to temperature changes.Currently, nickel-titanium (NiT)
i) Alloy and copper-zinc-aluminum (CuZnΔl
) alloy has been put into practical use, but in the present invention, Ni
'I' Transformation point in i system (martensite transformation start temperature)
It is desirable to use a material whose temperature is lower than the snow temperature, for example, -45°C or lower.

In the present invention, the aspect of using a shape memory alloy for the arch bend part 2 is generally described as follows: Zicral metal I6 surrounding the core 15 shown in FIG. 3 and FIG.
Instead of 7, a shape memory alloy S formed in the shape of a flat plate is memorized in the shape of the arch bend and is attached.

At this time, the shape of the shape memory alloy is not limited to the flat plate shape as described above, but may also be a material obtained by gathering round or square wire rods, or may be a mesh type in which fine wires are woven vertically and horizontally.

These shape memory alloys have a core 1 as shown in Figure 3.4.
A mode in which it is charged in a sandwich-like manner on the top and bottom of 5 (Fig. 6)
In addition, a single flat plate structure as shown in FIG. 5 or a box-type structure as shown in FIG. 7.8 may be used.

1. Functions and Effects] Since the ski of the present invention uses shape memory alloy in the arch bend part where the most severe load is applied, ■ Even if the arch bend disappears due to load, the superelasticity of the shape memory alloy will not be affected. When the load is removed, the arch bend returns to its original shape.

- Due to its superelastic properties, there is almost no fatigue in the material, and arch bends do not disappear semi-permanently, making it possible to create skis with an elastic force of α.

■NiTi-based shape memory alloys have excellent properties as vibration-proofing materials, so they are also effective in vibration absorption, which is one of the characteristics determining factors of skis, and are expected to provide high-speed stability when skiing. As a result, it maintains the flex and torsion properties necessary for skiing over a long period of time.
It is possible to provide a ski that maintains torsional strength), responsiveness (return characteristics), and pibration damping characteristics (vibration absorption characteristics) and has a long service life.

[Brief explanation of the drawing]

Figure 1.2 is a side view of the ski, Figure 1 is when no load is applied,
Figure 2 shows the slope deflected by the load during sliding. The upper part is the ski, and the lower part is the arch bend. Figure 3.4 is a schematic cross-sectional view of the arch bend section, where 11 is the surface sheet, 12 is the sliding surface, 13 is the side wall, 14 is the edge, 15 is the core, 16 is zicral metal, I7 is high-carbon metal, I8 is a glass fiber box, and (S) is a shape memory alloy. 5 to 8 are schematic cross-sectional views illustrating the shape of the shape memory alloy S attached to the arch bend 11.

Claims (1)

[Claims] A ski board characterized by having a shape memory alloy mounted inside at least the arch bend part (camber part).