JPH08131606A - Rigidity adjuster and ski with it - Google Patents

Abstract

PURPOSE: To provide a rigidity adjuster and a ski with the adjuster which keeps appropriate bending of a ski while the skier is skiing even when the load on the ski is small, prevents too much bending when the load is heavy, and keeps its edge holding performance at a certain level so that the skier can turn more easily. CONSTITUTION: This ski has a rigidity adjuster installed on the upper surface. The rigidity adjuster consists of a connecting board 2 placed in the length direction of the ski 4, and a pair of fixing parts 3 to fix the longitudinally front and rear ends of the connecting board 2. The connecting board 2 and the fixing parts 3 are placed with a mobile distance between them so that the front and the rear edges of the connecting board 2 can relatively move from the front to the rear in the length direction of the ski when the ski is turned, and the rigidity of the ski can be adjusted by such mobile distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rigidity adjusting device which is attached to a ski to automatically adjust the rigidity of the ski when skiing, and a ski turn operation can be facilitated by mounting the device. It is intended to provide such a ski.

[0002]

2. Description of the Related Art A function of facilitating a turn of a ski during skiing is to provide a flexural rigidity distribution for the ski to bend along a turn arc and a front ground contact point portion in its plan shape. And the width of the rear ground point is wide, and there is a side cut shape with a thin central part.Furthermore, in its side shape, it grounds at the front ground point and the rear ground point, and the middle part is arched curve. There is an arch camber shape or the like that is formed and the gliding surface does not touch the ground when there is no load. To turn the ski, turn the side-cut ski into the ski
While moving the body to the side where you want to turn, add weight to bend the skis by raising the edges and slide along the warp, the bending rigidity of the ski changes the warp condition and turns. Then, the warp repels and returns due to the presence of the arch camber and the rigidity of the plate, and by using such a repulsive force of the ski, it is easy to cut back.

On the other hand, as a conventional ski structure, there are a sandwich structure, a box structure, a monocoque structure and the like. Each of these skis has a length corresponding to almost the entire length of the ski and has different properties, and several types are combined and laminated and bonded to achieve the performance of the designed ski. It was molded. for that reason,
The rigidity of the ski was almost constant. Therefore, the amount of deflection of the conventional ski is increased in proportion to the load applied to the ski.

[0004]

In order to enable quick sliding, it is necessary for the edge to have an excellent edge hold performance for grasping (cutting) the snow surface at the time of turning. It is desirable that the performance is always constant. The force applied to the ski during sliding is a combined force of the centrifugal force, the gravity of the skier, and the inertial force. In order to keep the edge hold performance constant, the amount of flexure of the ski during skiing is Even if the magnitude of the force applied to is changed, it is desirable that it is always within a certain range. However, when skiing a turn, there are standing load, stepping down, sinking load, etc., but since the skier's gravity is constant down the slope, the force applied to the ski increases from the first half of the turn to the second half of the turn. Therefore, when the conventional ski is turned, since the rigidity of the ski is constant, the amount of deflection of the ski increases as the latter half of the turn when the force applied to the ski increases. Thus, for example, if a skier has an appropriate flexure during a straight run, even if the ski has an appropriate flexure in the first half of the turn, it will be more than necessary in the latter half of the turn when the force applied to the ski is greatest. Since the amount of deflection is large and the longitudinal load distribution of the ski (reaction force from the snow surface) is only near the center of gravity of the skier, the edge hold performance in the front and rear parts of the ski is reduced, and There were problems that the ski was deviated from the ideal trajectory, the speed was reduced, and the running stability was reduced.

Therefore, according to the present invention, the amount of deflection of the ski during skiing has a proper amount of deflection even when the force applied to the ski is small, and when the force becomes large, it is added as in the conventional case. A device that prevents excessive bending due to bending in proportion to the force applied to the ski, and by mounting the device on a ski, it prevents the edge hold performance from always lowering beyond a certain level, and the edge always grasps the snow surface. The present invention intends to provide a ski that can be easily turned by sliding along an ideal trajectory.

[0006]

In order to achieve the object of the present invention, the present invention has the following constitution. That is, in a rigidity adjusting device for a ski, which comprises a connecting plate arranged along the longitudinal direction of the ski, and a pair of locking members that loosely fit both front and rear ends in the longitudinal direction of the connecting plate, The connecting plate and the locking member are arranged such that, when the ski is bent, both ends in the longitudinal direction of the connecting plate have a floating distance such that they are relatively movable in the longitudinal direction of the ski. A rigidity adjusting device for a ski, which adjusts the rigidity of the ski according to the play distance. Therefore, when the ski is flexed, the amount of flexion is within the range in which the connecting plate can freely move within the locking member, and exhibits the rigidity of the ski body, and the ski exceeds the range. When the connecting plate is fixed by the locking member, the rigidity of the connecting plate affects the rigidity of the ski, and the rigidity of the ski increases, so the rate of increase in the amount of deflection decreases. To do. The rigidity adjusting device can be attached to any position of the ski, but when it is arranged on the upper surface of the ski, that is, the connecting plate arranged along the longitudinal direction of the ski and the length of the connecting plate. A ski with a rigidity adjusting device for the ski, which comprises a pair of locking members that are loosely fitted at the front and rear ends in the vertical direction, mounted on the upper surface of the ski, wherein the connecting plate and the locking member are bent. At this time, both ends of the connecting plate in the longitudinal direction are arranged such that both ends of the connecting plate have a floating distance that allows the ski to be relatively movable in the longitudinal direction of the ski. A ski having a ski-rigidity adjusting device mounted thereon and floatingly attached to the upper surface of the ski by a locking member fixed directly to the ski.

When the connecting plate is designed as a ski having the same structure from the free-moving state to the fixed state, when the ski is designed to have the same structure, the ski body and the connecting plate constituting this device are It can be determined by setting the rigidity and the rigidity of the ski when the device is operating.

Further, the range of the length direction in which the rigidity is determined and the rigidity adjusting device of the present invention having the floating distance set so as to exhibit the rigidity is arranged in the length direction, , It can be freely set depending on the condition of the course to be slipped and the quality of snow, but it is larger than the attachment range of the fastener including at least the shoe mounting range, and the ski is placed on a flat surface and placed in the ski shoe mounting position. The contact pressure distribution between the skiing surface and the flat surface of the ski when the load is applied is large,
It is preferable to be within the range from the front ground contact point to the rear ground contact point of the ski, and the range in the width direction is 1/2 of the width of the ski.
To the entire width is preferable. Further, a ski, on which the device of the present invention is mounted, is bent over a certain curvature, and when the connecting plate is fixed in the device, rubber, spring, foam or the like is formed at the abutting portion of the connecting plate and the locking member. If the cushioning member is provided, the ski will have a gentler change rate when the rigidity is changed than when the cushioning member is not provided. The material for forming the connecting plate is not particularly limited, but for example, a metal such as steel or aluminum, GFRP, CFRP, or the like can be used.

[0009]

According to the rigidity adjusting device for a ski of the present invention, the connecting plate and the locking member are provided with a floating distance, and both ends of the connecting plate are loosely fitted by the locking member. Since both ends of the ski are free, both ends of the connecting plate can move relative to the longitudinal direction of the ski due to the flexion of the ski, so that the rigidity of the ski is ideal before and after the binding area. Can be designed as desired. Therefore,
If the rigidity adjusting device is attached to a ski, the amount of flexure of the ski can be freely adjusted by designing the rigidity of the connecting plate, setting the play distance, and the range in which the device is arranged.
That is, when the connecting plate of the device has a deflection within a range in which it can freely move, the ski has the rigidity designed for the ski that is not affected by the present device, and the amount of deflection becomes larger than that. When the connecting plate is fixed by the locking member, the rigidity of the present device affects the rigidity of the ski, and the rigidity of the ski becomes high, and the amount of deflection of the ski increases. Will be reduced.

[0010]

EXAMPLE An explanation will be given based on an example of the present invention. [Embodiment 1] FIG. 1 is a side view illustrating the outline of Embodiment 1 in which the rigidity adjusting device of the present invention is mounted on the upper surface of a ski, and FIG. 2 is an enlarged cross-sectional explanatory view of the main parts of FIG. is there. FIG. 3 is an explanatory diagram when the present apparatus is in operation. The rigidity adjusting device 1 of the present embodiment includes a connecting plate 2 and a locking member 3. The connecting plate 2 has a length of 80 cm, a width of 6 cm, and a central thickness of 2.5 c.
It was formed of an aluminum alloy having a thickness of m and a thickness of 1 cm at both ends in the length direction. Key parts 9 are formed at both ends of the connecting plate 2 in the longitudinal direction, and the key parts 9 are engaged by fitting the engaging members 3 directly attached to the upper surface of the ski. is there. The rigidity adjusting device 1 has a total length of 2
It was mounted on the upper surface of a ski of 10 cm so that the floating distance x was 2.2 mm between the connecting plate 2 and the locking member 3 centering on the attachment position of the fastener. The connecting plate 2 is mounted apart from the upper surface of the ski by key-shaped portions 9 formed at both ends thereof. Further, the lower surface of the key-shaped portion 9 that directly contacts the upper surface of the ski and supports the connecting plate has a flat shape, and the side surface has a V shape so that the connecting plate 2 moves. When doing so, it is possible to reduce the friction between the key mold portion 9 and the upper surface of the ski. In this embodiment, the distance, that is, the floating distance b is set to 1 cm. The rigidity of the connecting plate 2 at this time was 4.8 × 10 ⁸ kgf · mm. The connecting plate 2
In setting the rigidity of, the floating distance b is preferably not 0 even with respect to the maximum weight during sliding when the rigidity adjusting device of the present embodiment is mounted on a ski and sliding, It is necessary to increase the rigidity as the length of the connecting plate 2 is longer. For example, various designs can be made according to the values of the length of the connecting plate 2, the floating distance b, and the maximum weight. The movements of the ski and the rigidity adjusting device 1 when the ski is fitted with the rigidity adjusting device 1 of the present invention will be described.

FIG. 2 is an explanatory view showing a state where the ski 4 is not deflected or is in a range of the amount of deflection designed for the ski 4, and FIG. 3 is designed for the ski 4 when sliding. It is explanatory drawing showing the state which began to bend more than the optimal deflection amount. In the state of FIG. 3, there are floating distances x, x between the key mold portions 9 at both ends of the connecting plate 2 and the locking members 3 provided so as to be fitted into the key mold portions 9. . The floating distance x decreases as the amount of deflection of the ski 4 increases, and as shown in FIG. 3, when the amount of deflection is greater than the optimum amount of deflection designed for the ski 4, the connecting plate 2 is attached to the locking member 3. It is fitted and locked and fixed, and the rigidity of the connecting plate 2 affects the rigidity of the ski 4, and the rigidity of the ski 4 increases so as not to bend more than necessary. Since such an operation is performed at the front and rear ends of the connecting plate 2 when the ski 4 is bent, the front and rear ends of the connecting plate 2 are
It moves relative to the front and rear with the boot center 8 as the center, that is, the front and rear deflection amounts of the ski are substantially the same, and the operability is improved. The load when a load was applied to the ski 4 with the rigidity adjusting device 1 having the above-described configuration was measured and the bending rigidity of the ski was measured at that time, and the load was applied to the ski without the rigidity adjusting device 1. FIG. 4 shows the results of measuring the weight and bending rigidity at that time. As can be seen from the figure, the flexural rigidity of the ski having the rigidity adjusting device 1 of the present embodiment is about 60 to 70 as compared with the ski having no rigidity.
% Increased.

A method for setting conditions for mounting the rigidity adjusting device 1 of the present invention on a ski will be described below.
The performance of the ski of the present invention is represented by a load-deflection curve as shown in the graph of FIG. That is, the vertical axis represents the load, and the horizontal axis represents the amount of deflection due to the load. Therefore, the ski should take into consideration the skier's gravity and the course on which it skis, etc.
Determine the maximum amount of deflection b2 required at c2, which is the maximum load that will be applied to the ski. Next, the ski body is designed so as to have a rigidity that exhibits a flexure curve A exhibiting an optimum flexure amount with respect to the load during the first half of the turn, that is, when the ski is oriented at the time of rising and before stepping on. Then, from the end of the first half of the turn, that is, the maximum deflection amount b1 before stepping on, the ski 4
The rigidity of the ski 4 is designed so as to have a rigidity that exhibits a flexure curve B that is the maximum flexure amount b2, and the material of the connecting plate 2 and the floating distance x for that purpose are determined.

When the ski 4 slides, it exhibits a straight line A which is the rigidity of the ski 4 until the load c1 corresponding to the end of the first half of the turn is applied, and after the point a, that is,
When the load increases in the latter half of the turn and the amount of deflection exceeds b1, the rigidity exhibits a straight line B having a higher rigidity than the straight line A.
In the present embodiment, the range in which the rigidity adjusting device 1 is mounted is 40 cm in the front and rear around the ski shoe mounting position, but the range is not limited to this range, and depending on the type of sliding, the ski can be used during sliding. Due to the distribution of the load, if it is larger than the binding range of the binding centering on the ski shoe mounting position and up to the front and rear ground contact points, as shown in FIG. 6, a more remarkable effect can be obtained from the rigidity distribution of the ski. .

[0014]

As described above, when the ski ski rigidity adjusting device of the present invention is mounted on a ski, when the ski flexes more than the designed flexure amount, the rigidity of the ski will be increased by the existence of the rigidity adjusting device. It is possible to suppress the increase in the amount of deflection and to prevent the amount of deflection from increasing more than necessary. Therefore, for example, if a moderate amount of deflection designed for a ski is obtained when the load applied to the ski in the first half of the turn is small, the operability is too high when the force applied to the ski in the latter half of the turn is too large. Although it was not possible to draw an ideal turn arc due to the fact that the ski slipped and the ski slipped, the ski ski equipped with the rigidity adjusting device of the present invention, even when the applied force in the first half of the turn is small, Even if a moderate amount of flexure is obtained and the force applied to the ski in the latter half of the turn is large, the flexure does not exceed the flexure designed for the ski, so the ideal ski flex can be obtained over the entire turn.

In addition, when the pressure applied to the ski is distributed toward the front due to the applied force, such as in an alpine competition, a book is placed at a position including the shoe mounting position from the front ground contact point of the ski. In the case of a ski having a pressure distribution that is closer to the rear such as when implementing the structure of the invention or gliding through fresh snow, etc., the structure of the present invention is located at a position including the shoe mounting position from the rear ground point of the ski. By carrying out, the rigidity can be changed more effectively. Therefore, if the device of the present invention is used for a ski, a sharp turn with little deviation can be made when sliding. Further, even if the skis have the same rigidity, the skis can be changed at different times when the rigidity changes, thereby increasing the degree of freedom in design.

[Brief description of drawings]

FIG. 1 is a side view of a ski according to a first embodiment.

FIG. 2 is an enlarged cross-sectional explanatory view of a main part of the first embodiment.

FIG. 3 is an enlarged cross-sectional explanatory view of a main part when the rigidity adjusting device is operating.

FIG. 4 is a diagram illustrating distribution of flexural rigidity of the ski of Example 1.

FIG. 5 is a drawing for explaining the load-deflection relationship of the ski of the embodiment.

FIG. 6 is a drawing showing the surface pressure distribution of a ski.

[Explanation of symbols]

 1 Rigidity adjusting device 2 Connecting plate 3 Locking member 4 Ski plate 5 Fastener 6 Ski boots 8 Boot center 9 Key part 10 Neutral axis x Floating distance b Floating distance

Claims (3)

[Claims] A rigidity adjusting device for a ski, comprising a connecting plate arranged along the longitudinal direction of the ski, and a pair of locking members for loosely fitting the front and rear ends of the connecting plate in the longitudinal direction. In the above, the connecting plate and the locking member have a floating distance such that both ends in the longitudinal direction of the connecting plate are relatively movable in the longitudinal direction of the ski when the ski is bent. An apparatus for adjusting the rigidity of a ski, which is arranged and adjusts the rigidity of the ski according to the play distance. 2. A rigidity adjusting device for a ski, which comprises a connecting plate arranged along the longitudinal direction of the ski and a set of locking members for loosely fitting both front and rear ends in the longitudinal direction of the connecting plate. When the ski is bent, both ends of the connecting plate in the longitudinal direction of the connecting plate are opposite to each other in the longitudinal direction of the ski, when the ski is bent. The skis and the bindings are placed on the connecting plate, and the connecting plate floats on the upper surface of the ski by a locking member directly fixed to the ski. A ski equipped with a rigidity adjusting device that is attached. 3. The rigidity adjusting device is mounted in a range up to a front and rear ground contact point, which is larger than a front and rear binding device mounting range around a ski shoe mounting position of a ski.
A ski equipped with the described rigidity adjusting device.