JPH08229189A - Planking material for ski ground - Google Patents

Abstract

PURPOSE: To enable comfortable ski sliding in a small amount of a snow fall by forming a thermoplastic resin made strand fusion-welded to each other in the net-like state to locate the upper end of the intersection point of the welded strands higher than a non-intersection point part. CONSTITUTION: A planking material formed of a thermoplastic resin made net and laid on a plane has the upper ends of intersection point of strands 3, 4 at a position higher than the non-intersection point part, i.e., the longitudinal strand 3 forming the upper surface of the net is in the highest position 6 at the intersection point part 5, and a non-intersection point part strand 7 between the intersection points 5, 5' is constructed to be bent downward and located lower than the upper ends 6, 6' of the intersection point parts. Thus, since only intersection point portion is constructed to be elevated, ski soles in ski sliding make few contact with the strands 3, 4, and accordingly, the contact with snow is increased. Even in a small amount of snow fall, sliding giving a feel approximating to that of snow surface can be enjoyed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ski laying material that allows skiing even when the amount of snow is small.

[0002]

2. Description of the Related Art In recent years, it is often the case that the amount of snowfall at outdoor ski resorts is small due to global warming, and due to lack of snow, it is often necessary to shorten the skiable period. As a measure against this, efforts are being made to extend the business period by introducing artificial snowfall machines. In addition, even in indoor ski resorts where the number of users has been increasing recently, efforts are being made to enable skiing with a small amount of artificial snow or crushed ice. That is, it is an important issue how to extend the business period during which skiing is possible with a small amount of snow, regardless of whether it is a ski resort caused by natural snowfall or a ski resort caused by artificial snowfall.

In order to cope with this, a mat in which a large number of brush-like units in which a large number of thin rod-shaped projections are vertically planted are combined on a resin substrate are combined for the purpose of being able to slide not only when there is snow but also when there is no snow. It is well known that it is shaped like a ski, and is used as a gliding surface for direct ski contact, or as a laying material for ski areas when there is little snow.

[0004]

However, since the above-described mat-like material has a brush-like running surface mainly for the purpose of obtaining smooth rotation of the ski when there is no snow, the mat-like material can be used in a state where there is little snow. There are the following problems when it is used as a laying material for a ski resort.

A large number of thin rod-shaped projections constituting a brush are subject to momentary pressing force by skis and skids, which causes large deformation, which often leads to breakage or loss. Since the sliding surface is brush-shaped, the ski sole is easily scratched. If the skier goes straight from the snow surface to the brush-like running surface, there is a risk of falling because the dynamic frictional resistance to the ski sole is greater on the brush-like running surface than on the snow surface. Since the sliding surface is a brush, it is possible to rotate,
Not as smooth as spinning on a snow surface. Assembling the brush-like unit at a ski area is time-consuming because the assembling work takes time due to the uneven fitting with a special tool, and the uneven joint part is easily peeled off depending on the slope shape. The resin substrate of the brush-shaped unit is apt to accumulate snowmelt water in terms of shape and cannot be efficiently drained to the ground.

Therefore, the inventors of the present invention have a purpose to use it in a state where there is little snowfall, and as a result of examining a ski laying material suitable therefor, as a result, use a net made of a thermoplastic resin having a specific structure. It has been found that the above can solve the above problems. Accordingly, it is an object of the present invention to provide a ski area covering that enables comfortable skiing with a small amount of snowfall.

[0007]

According to the present invention, a strand made of a thermoplastic resin is fused in a mesh shape, and when laid on a flat surface, the height of the upper end of the intersection point of the fused strand is a non-intersection point. It is a ski area laying material comprising a net made of a thermoplastic resin, which is located at a higher position. The present invention also includes, as a preferred embodiment, a net structure in which the non-intersection points of the strands on the upper surface of the net are curved downward, and the non-intersection points of the strands on the lower surface intersecting with the net are curved upward.

The skiing material of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a ski slope or artificial ski resort floor surface 1 on which a ski resort material 2 made of the thermoplastic resin net of the present invention is laid. By laying a lot of this litter, you can get a ski runway with a desired area. This net is especially on steep slopes where it is hard to get snow,
It may be selectively laid at the lift entrance / exit, where the snow melts easily, or at the dining room entrance / exit.

FIG. 2 is an example of an enlarged perspective view of a mesh portion of a thermoplastic resin net. In the net, the parallel unidirectional strands 3 and 3 forming the net upper surface and the other directional strands 4 and 4 forming the net lower surface intersect at an intersection point 5,
5 ′, 5 ″, etc. are fused. The plane shape of the net is arbitrary, and the strands 3 and 4 may be orthogonal to each other as shown in FIG. 2 or may be crossed at an arbitrary angle. Good.
Also, a third strand may be provided which intersects the above-mentioned two-direction strands.

The laying material of the present invention is characterized in that, when laid on a flat surface, the height of the upper end of the intersection of the strands is higher than that of the non-intersection, and in the example of FIG. The constituent longitudinal strands 3 are at the highest position 6 at the intersection 5, and the non-intersection strand 7 between the intersections 5 and 5'has a downwardly bent structure and is lower than the upper ends 6 and 6'of the intersections. Has become. On the other hand, the lower end 8 of the intersection 5
Is at the lowest position among the transverse strands 4 forming the lower surface of the net so that the intersection 5 becomes the highest position when the net is turned upside down. Bends upward and is located higher than the lower end 8 of the intersection, but lower than the upper end 6 of the intersection.

The cross section of the strand 10 forming the net may be of any shape, but in order not to damage the ski sole, in the case of a quadrangle, the corners are rounded or the cross section is circular or elliptical. Is preferred.

Since the larger the contact area of the ski sole with the snow surface is, the better the feeling of sliding near the snow surface is, so unless obstacles such as pebbles on the ground surface appear on the mesh, the strands 3 in the same direction, It is preferable to set a large distance between 3 and 4, 4.
Although depending on the condition of the slope, the distance between the strands is generally 0.5 to 20 cm, preferably 1.5 to 10 cm.

FIG. 3 is a sectional view of the runway when the thermoplastic resin net of the present invention is laid on a ski resort. In FIG. 3, a laying material 2 is laid on a slope 1 of a ski resort, and snow 11 is piled on the laying material 2 in a thickness greater than the thickness of the laying material. In FIG. 3, the upper end 6 of the intersection 5 is higher than the non-intersection 7 of the strand, and the lower end 8 of the intersection is lower than the non-intersection 7.

When the laying material of the present invention is laid on a flat surface as described above, only the intersections are raised, so that the ski sole is less in contact with the strands during skiing, and the snow is accordingly reduced. With more contact with the surface, you can enjoy a gliding feel that is closer to the feel of a snow surface even if the amount of snow is small, and smoother rotation is possible. In addition, since the whole has a two-dimensional corrugated plate structure, the snow is held well on a steep slope, and there is little risk that the snow will fall. On the reverse side of the net, on the contrary, the intersection is the lowest, so
As shown in, the thermoplastic resin net is not grounded except at the intersection of the strands, and the snow melt is drained efficiently.

The material of the strands constituting the net of the present invention is a thermoplastic resin, and it is preferable to use polyethylene resin, particularly high density polyethylene having a density of 0.925 g / cc or more. By using the polyethylene resin having the above density, the dynamic frictional resistance between the ski sole and the strand is made closer to that of the ski sole and the snow surface, and when the snow surface travels straight to the running surface according to the present invention, or by any chance The risk of falling can be further reduced even when going straight without snow inside.

The thermoplastic resin net used in the present invention is advantageously produced by an extrusion molding method. In this case, the width of the net is generally 0.5 to 4 m, and the length is transportable. It is possible to make it as large as possible and it is extremely easy to lay it on a ski slope. Moreover, since the strands have a relatively large mesh structure, the weight per unit area is light and the price is low.

[0017]

Operation The ski slope on a snowy surface becomes unusable because the ground surface or the floor surface in an indoor ski area is exposed on part of the snow surface. The present invention prevents the ground surface or floor surface from being exposed by laying a thermoplastic resin net made of a thermoplastic resin on the ski slope or artificial ski slope floor surface, and at least the thickness of the thermoplastic resin net. By maintaining the above snow cover, the ski will slide on most of the snow surface and a part of the thermoplastic resin net strand when going straight on the ski, while the ski edge will be caught in the snow surface when the ski is rotating. By inserting it, it becomes possible to rotate more smoothly than the rotation caused by biting the brush. Even if the skier goes straight from the snow surface to the sliding surface on which the laying material of the present invention is laid, the difference in dynamic friction resistance between both surfaces is small, and the risk of falling is reduced.

[0018]

EFFECTS OF THE INVENTION Since the ski area laying material of the present invention is a thermoplastic resin net having a structure in which only the strand intersections are raised, the contact area with the snow surface of the ski sole is large,
Smooth rotation is possible. In addition, even on steep slopes, it is easy to get snow and it is hard to fall down. Furthermore, on the back side of the net, snow is efficiently drained without grounding except at the intersections of the strands. Further, unlike the mat having the brush-like unit, there is no thin rod-shaped projection on the runway surface, so that the projection is not damaged or damaged, and the ski sole is not scratched. Since the laying material of the present invention has such many features, it has a great utility value as a laying material for a ski resort for allowing gliding in a state where the amount of snow is small.

[Brief description of drawings]

FIG. 1 shows a state in which a ski resort lining material of the present invention is laid on a ski resort.

FIG. 2 is an enlarged perspective view of a mesh portion of the ski resort flooring material of the present invention.

FIG. 3 is a cross-sectional view of a runway on which the ski ground covering of the present invention is laid.

[Explanation of symbols]

 1 Ski slope 2 Laying material 3 Longitudinal strand 4 Transverse strand 5, 5 ', 5 "Strand intersection 6,6' Upper end of strand intersection 7 Non-intersection of longitudinal strand 8 Lower end of strand intersection 9 Horizontal Non-intersection point of directional strand 10 Strand cross section 11 Snow

Claims (2)

[Claims] 1. When a strand made of a thermoplastic resin is fused in a mesh shape and is laid on a flat surface, the height of the upper end of the intersection point of the fused strand is higher than that of the non-intersection point. Ski laying material made of a characteristic thermoplastic resin net. 2. The ski resort according to claim 1, wherein the non-intersection point of the strand on the upper surface of the net is curved downward, and the non-intersection point of the strand on the lower surface intersecting with this is curved upward. Bedding material.