JPH0975498A - Ski - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance continuous turnability, and also to easily polish the sliding surface at the time of manufacture by forming recessed parts by means of ribs so that they are arranged on the upper surface of the ski-plate on the outer side than the center line in breadth, and also they are widened toward both the lengthwise end parts at both the front and rear ends of a ski plate in the horizontal direction other than the central plate part. SOLUTION: A left-foot ski plate 1a is provided with recessed parts 4a, 4b on the outside parts 7 outer than the center line 2 of the ski plate in breadth or on the left side. The recessed part 4a is formed on the further front side than the plate part 3 or on the forward side part and the recessed part 4b is formed on the further rear side than the plate part 3 or on the rear side part. The maximum on the plate part 3 side of the recessed part 4a is set to be approximately 5 to 10mm, while the width on the front end part is set to be approximately 30 to 50mm. The recessed part 4b is also formed in the same manner. The depth of the recessed part 4a or 4b is formed to be approximately 0.5 to 2.0mm. The right-foot ski plate is also formed in the same manner.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to skis, and in particular to skis suitable for slalom.

[0002]

2. Description of the Related Art Generally, left and right skis having the same shape are used. However, for competitive skis such as slalom, skis having various characteristics have been proposed in order to further improve performance such as rotatability.

For example, an asymmetrical ski is known, and one ski is formed asymmetrically. As in the ski shown in FIG. 4, the thickness of the ski in the front portion and the rear portion is gradually reduced from the thick inner edge side to the thin outer edge side in a slope shape.

Further, in Japanese Utility Model Laid-Open No. 6-13881,
`` A skiing board for an alpine ski having a sliding sole, a metal edge attached to the sliding sole, an upper surface, and a side wall connecting the upper surface and a ridge side portion of the metal edge, Provided at the front and / or rear of the central portion having the supporting surface on the upper surface, so that the depth gradually decreases from the central portion to the vicinity of the front contact line and / or the rear contact line at the end of the ski. Ski having at least one recess formed therein.

[0005]

[Problems to be Solved by the Invention] In slalom,
It is required to smoothly carry out repeated small turns. For that purpose, the left and right skis are required to have unique properties on the outside and inside.

[0006] For example, at the start of a turn, it is necessary to reduce catching and snow surface resistance and quickly and smoothly turn back.

In the first half and the middle of the turn, it is required to improve the snow grip performance of the valley foot ski.

Further, in the latter half of the turn, if the ski has the same thickness, the entire outer edge receives the resistance of the snow, and the turn arc that rises becomes large, and when the side curve of the outer edge is kicked from the in side, it is relatively straight. There was a problem that the pole would bend too much.

Further, if the outside is too weak, there is a problem in that the snow surface cannot be caught when the light depression is made and the deviation becomes large.

Further, in the manufacturing process, when there is a recess on the surface side of the ski, there is a problem that it is difficult to flatten the sliding surface when it is polished, and twisting may occur after molding.

The present invention is excellent in continuous turn performance,
Moreover, the objective is to obtain a ski whose running surface is flat and easy to polish during manufacturing.

[0012]

In order to solve the problems, the left and right skis are located outside the center line of the ski width on the upper surface of the ski and on the front and rear parts in the longitudinal direction of the ski from the plate part. We propose a ski characterized in that it has recesses that gradually widen toward both ends in the longitudinal direction of the ski, and the recesses are formed with ribs whose outer portions are flush with the surface of the ski.

[0013]

1 is a plan view of a ski for a left foot, FIG. 2 is a plan view of a ski for a right foot, FIG. 3 is a cross section taken along line AA of FIG. 1, and a front view of a ski for a left foot. FIG. 4 is a partial enlarged plane, FIG. 5 is a rear enlarged plane of a left foot ski, FIG. 6 is an explanatory diagram when a slalom competition turn is performed using the ski of the present invention, and a ski running surface is formed on a production table. A description will be given with reference to FIG. 7, which is a cross-sectional explanatory view in the case of working with the above.

The ski 1 comprises a ski 1a for the left foot and a ski 1b for the right foot. Each ski 1
a and 1b are portions 7 outside the center line 2 of the ski width of the surface.
Then, recesses 4a and 4b are provided in both front and rear portions of the plate portion 3 in the longitudinal direction of the ski.

The left foot ski 1a is provided with recesses 4a and 4b outside the center line 2 indicating the center of the ski width, ie, the center line 2 running in the longitudinal direction, that is, on the left side, and the right foot ski 1b is long. The recesses 4a and 4b are provided on the outer side portion 7 of the center line 2 that runs in the direction, that is, on the left side.

The recesses 4a of the left and right skis 1a and 1b are provided outside the center line 2 and in front of the plate portion 3, that is, in the front portion.
The planar shape of the recess 4 a is such that it gradually widens from the plate portion 3 toward the front end portion side. The maximum width of the recess 4a on the plate portion 3 side is 5 to 10 mm and the width on the front end side is 30 to 50 mm. The recess 4a is formed by a linear rib 5a having an outer portion on the outside of the ski. The ribs 5a are flush with the surface of the ski, and are formed with the same width from the outer side surfaces of the skis 1a and 1b.

In this embodiment, the depth of the recess 4a is 0,
It is constant at 5 to 2.0 mm. In another embodiment, the recess 4
There is a form in which the depth of a becomes deeper as it goes forward, and a form that becomes shallower as it goes forward. Recess 4a
The effect of making the depth of the ski deeper as it goes forward is to reduce the edge-holding force on the outer side of the top, thereby eliminating unnecessary clinging and smoothing the ski's rotatability. In addition, the depth of the concave portion 4a is set to the front (on the front end portion side).
The effect of making it shallower as you go is to control the top presser foot to a moderate strength.

The recesses 4b of the left and right skis 1a and 1b are provided on the outer side portion 7 of the center line 2 and on the rear or rear side of the plate portion 3. The planar shape of the recess 4b is such that it gradually widens from the plate portion 3 toward the rear end portion side. Recess 4
The width of the plate b on the plate portion 3 side is 5 to 10 mm, the width on the rear end side is 30 to 50 mm, and the concave portion 4b is formed by a linear rib 5b on the outer side of the ski.

In this embodiment, the depth of the recess 4b is 0,
It is constant at 5 to 2.0 mm. In another embodiment, the recess 4
There is a form in which the depth of b becomes deeper toward the rear, and a form where it becomes shallower toward the rear. Recess 4b
The effect of making the depth of the ski deeper as it goes backwards is to weaken the edge hold on the outside of the tail so that the ski can be operated smoothly with a minimum force. Also, the effect of making the depth of the recess 4b shallower toward the rear is to control the holding force of the tail to an appropriate level.

The plate portion 3 is a binding mounting portion of the ski 1a and the ski 1b.
It is located in the central portion in the longitudinal direction of 1b and is planar. The length of the plate portion 3 is 650-850 mm.

The length of the recesses 4a and 4b is 350 to 750.
mm.

The ribs 5a and 5b are flush with the surface of the ski, and are formed at the same distance from the outer surface of the skis 1a and 1b to have the same width of about 3 to 7 mm, preferably about 5 mm. The ribs 5a, 5b are linear along the outside of the ski. The thickness is the same as the thickness of the plate portion 3 and the inner portion 6 of the ski 1.

The ski according to the embodiment of the present invention operates as follows during a continuous turn such as a slalom competition. 9 is a pole. (See Figure 6)

At the time of introducing the turn A, the outer portion 6 (top portion, which is thinner than the inner portion 7 due to the recesses 4a, 4b).
The outside of the tail section) reduces snow surface resistance such as catching at the start of a turn, enabling quick and smooth turning back. Furthermore, proper twisting and bending occur, and the edge can be easily turned back.

In the first half of the turn and in the middle B, the force concentrates on the inside edge due to the thickness of the inner portion 7 of the valley-shaped ski (ski plate for the left foot) 1a, thereby enhancing the snow surface grip performance of the ski.

In the second half C of the turn, since the ski thickness of the outside portion 6 of the mountain foot ski (ski plate for the right foot) 1b is thinned by the recesses 4a and 4b, the weight shifts from the valley foot to the mountain foot. When you turn up, you can use the tight side curve of the plate to turn up with a smaller turn arc to end the turn. That is,
Improves sharpness in the second half of the turn.

When sliding a straight pole, the rib 5
The outside is strengthened by a and 5b. It is weak when you step on it strongly, but the outside edge catches the snow surface with some strength when you step on it lightly.

Further, the ski of the embodiment of the present invention has the ribs 5a and 5b having the same thickness as the plate portion 3 and the inner portion 7 on the outer side of the recesses 4a and 4a, though the skis have unequal thickness.
As shown in FIG. 5, when the ski is manufactured and the skid surface 11 is placed on the production table 10 with the skid surface 11 facing upward, the skid surface 11 becomes parallel to the skid surface. Therefore, when the sliding surface 11 is polished, it can be polished flat, and twisting of the ski after molding can be prevented.

[0029]

Therefore, the ski of the present invention is excellent in continuous turn performance, and the sliding surface is easily ground flat during manufacturing.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a left foot ski of the present invention.

FIG. 2 is a plan view of an embodiment of a ski for a right foot of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is an enlarged plan view of the front part of the left foot ski of the present invention.

FIG. 5 is an enlarged plan view of the rear portion of the left foot ski of the present invention.

FIG. 6 is an explanatory view of downhill when a ski of the present invention is slalom.

FIG. 7 is an explanatory cross-sectional view of a case where the ski-sliding surface is faced up on the production table.

[Explanation of symbols]

 1a Ski for left foot 1b Ski for right foot 2 Center line of ski width 3 Plate part 4a, 4b Recessed parts 5a, 5b Rib 6 Outer part 7 Inner part 8 Pole 9 Ski run surface 10 Manufacturing table A Turn introduction B Turn middle time Second half of C turn

Claims (1)

[Claims] 1. The left and right skis are located outside the center line of the ski width on the upper surface of the ski and on the front and rear sides of the ski in the longitudinal direction of the ski, respectively toward both ends in the longitudinal direction of the ski. A ski characterized by having a gradually widening recess, the outer part of which is formed by a rib whose height is flush with the surface of the ski.