JPH0133097Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to the improvement of skis. Conventionally, in skis, various vibrations are generated depending on the condition of the snow surface while skiing, and this vibration hinders the directional stability of the ski while skiing, and also reduces the holding power of the edge against the snow surface. This was a factor that deteriorated maneuverability such as rotation. Therefore, various attempts have been made to improve the maneuverability of skis by attenuating the vibrations that occur during skiing as quickly as possible . A ski in which a rubber sheet 2 having viscoelasticity is arranged over the entire length of the ski is known, and as shown in FIG. Skis equipped with a rubber sheet 2' are also known. In addition, as shown in FIG. 4, a ski in which a rubber sheet 2'' having similar viscoelasticity is divided into at least two parts and arranged in the shovel part 3 and tail part 4 of the ski 1 is also known. However, while these conventional skis have a vibration damping effect, they have the following drawbacks: As shown in the ski 1 shown in FIG . By arranging them over the entire length, vibration damping properties are very good, but the bending rigidity of the ski is reduced, the necessary elasticity distribution is insufficient, and edge retention and torsional rigidity are accordingly poor. As a result, the ski had extremely poor maneuverability, and the weight of the ski itself was also heavy.Furthermore, the rubber sheet 2' shown in Fig. 3 was used at the front of the ski with emphasis on the shovel portion 3 of the ski 1 . In the ski 1 arranged in the ski, the vibrations were somewhat attenuated by the shovel part of the ski, but it was not very effective and had the disadvantage that the strength of the shovel part of the ski was weakened.The rubber shown in Figure 4 In skis in which the sheet 2'' is divided into at least two parts such as the shovel portion 3 or the tail portion 4 of the ski, the vibration damping properties are good, but on the other hand, the rubber sheet 2'' is arranged in at least two places. Rigidity decreases in this part, especially torsional rigidity decreases, which makes it easy to twist and reduces edge holding power, resulting in poor maneuverability when turning or changing direction.As a result, recently It is also known that stainless steel wire is interposed in the rubber sheet to increase rigidity.
In addition to increasing the weight of the ski by intervening stainless steel wire, when a rubber sheet is placed with stainless steel wire intervening, the rigidity distribution of the ski itself becomes unbalanced due to the high rigidity of the stainless steel wire. This had the disadvantage of decreasing maneuverability. In view of these conventional drawbacks, the present invention improves the vibration damping properties of skis, and also prevents the decrease in rigidity caused by the rubber sheet, which was considered a drawback of the conventional skis.
The purpose was to provide skis with good maneuverability. To explain the present invention based on the drawings, as shown in FIGS. 5 to 11, a vibration-proof sheet member 7 made of a viscoelastic material in which mica powder is blended and dispersed is attached to the ski shoe fastener attachment area of the ski 5 . This ski is characterized in that only 6 constituent members are arranged between layers. As described above, in the ski 5 of the present invention,
Unlike conventional skis, the anti-vibration sheet member 7 containing mica powder blended and dispersed in a viscoelastic material is disposed only in the ski shoe fastener attachment area 6, resulting in the following effects. In other words, by incorporating mica powder, the mica powder plays the role of a reinforcing material and exhibits higher rigidity than the viscoelastic material alone, so the rigidity of the central part of the ski does not decrease as much as in conventional skis. In addition, since the anti-vibration sheet member 7 is not arranged in the shovel part 3 and tail part 4 of the ski, the rigidity of these parts does not decrease, and therefore the ski has high torsional rigidity and good edge retention. Become. In particular, in the present invention, mica powder with a particle size of, for example, 30 to 200 mesh is added to the viscoelastic material at a weight percentage of 10 to 30%.
By blending and dispersing the mica powder, vibration energy is converted into thermal energy through friction at the interface between the mica powder and the viscoelastic material, resulting in good vibration damping properties and the effect of preventing a decrease in rigidity. Also, in the ski of the present invention, unlike the conventional rubber sheet with stainless steel wire interposed therebetween, the stiffness distribution of the entire ski is well balanced and maneuverability is improved. In addition, the mica powder used in this invention has a specific gravity of 2.7.
3.1, it is lighter than conventional stainless steel wire, which has a specific gravity of about 8.0, making it a ski that is easier to operate. As the viscoelastic material used in the present invention, natural rubber, synthetic rubber, synthetic resin having flexibility, etc. can be appropriately selected and used. Next, in the present invention, as shown in the embodiments shown in FIGS. 6 to 11, a vibration-proof sheet member 7 made of a viscoelastic material containing mica powder mixed and dispersed is applied to each ski board only in the area where the ski shoe fastener is attached. Vibration damping performance is improved by arranging the components in a laminated manner between layers. That is, FIG. 6 shows a case where a vibration-proofing sheet member 7 is arranged between an arbitrary reinforcing member 9 arranged on the lower surface of the ski core 8 and a steel edge 10 (Example 1). . FIG. 7 shows a case where a vibration-proofing sheet member 7 is arranged between an arbitrary reinforcing member 9 arranged on the upper surface of the ski core 8 and the upper surface member 11 (Embodiment 2). FIG. 8 shows a case where the anti-vibration sheet member 7 is arranged so as to be in contact with the lower surface side of the ski core 8 (Embodiment 3). FIG. 9 shows a case where the anti-vibration sheet member 7 is arranged so as to be in contact with the upper surface side of the ski core 8 (Embodiment 4). As another example, as shown in FIGS. 10 and 11, the anti-vibration sheet 7 of the present invention can also be used for a ski with a box structure in which a fiber-reinforced plastic 12 is arranged to surround the core 8 of the ski. also exhibits the same effect. Regarding the skis of the above embodiments, the characteristic values of the skis without using the anti-vibration sheet member 7 and
Comparison data with skis etc. using conventional rubber sheets will be displayed.

【table】

[Table] As is clear from the above data, skis using the anti-vibration sheet member 7 made of a viscoelastic material containing mica powder of the present invention have a remarkable vibration damping effect due to anti-vibration. It is possible to prevent a decrease in the strength and rigidity of the ski board itself, and to provide skis with good maneuverability. In particular, in the ski of Example 1, since it is used on the lower surface of the center body in the area where the fasteners are attached, it effectively damps the vibrations received from the snow surface and prevents the transmission of vibrations to the skier. This is extremely beneficial as it provides good maneuverability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a ski. FIG. 2, FIG. 3, and FIG. 4 are plan views showing the arrangement of rubber sheets in skis using conventional rubber sheets. FIG. 5 is a plan view showing a ski on which a vibration-proofing sheet member made of a viscoelastic material containing mica powder according to the present invention is disposed. Figures 6 to 11 are
1 is a cross-sectional perspective view of a main part of each embodiment of a ski according to the present invention; FIG. 1 ...Ski board, 2, 2', 2''...Rubber sheet, 3...Shovel part, 4...Tail part, 5
... Ski board, 6 ... Ski shoe fastener attachment area, 7 ... Vibration-proof sheet member, 8 ... Core body, 9
...Reinforcement member, 10...Steel edge, 11...
...FRP.

Claims (1)

[Claims for Utility Model Registration] (1) A vibration-proofing sheet member made of a viscoelastic material in which mica powder is blended and dispersed is arranged between the layers of the constituent members only in the area where the ski shoe fasteners are attached to the skis. skis. (2) Claim 1 of the utility model registration claim characterized in that the particle size of the mica powder used in the vibration-proof sheet member made of a viscoelastic material in which the mica powder is blended and dispersed is in the range of 30-200 mesh. skis. (3) Claim 1 of the utility model registration claim, characterized in that the proportion of mica powder used in the vibration-proof sheet member made of a viscoelastic material mixed and dispersed with mica powder is 10 to 30% by weight. The skis listed.