JPH0717339Y2 - Snow melting prevention structure at ski resort - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a snow melting prevention structure for reducing melting of snow due to geothermal heat in a ski resort.

[Problems to be solved by conventional techniques and devices] Ski resorts include natural ski resorts that use natural snowfall and so-called artificial ski resorts where artificial snow is used to spray artificial snow on the slopes. At any of the ski resorts, the heat of the ground makes it easy for the accumulated snow to melt. It is estimated that the extent of snow melting due to this geothermal heat is more than double that of snow melting due to solar heat and outside temperature. Even in regions with relatively high geothermal power and regions with low geothermal power, the amount of snowmelt due to this geothermal heat is large in early winter and early spring. This makes it difficult to secure snowfall suitable for skiing, and at artificial ski resorts, it is necessary to frequently spray supplemental artificial snow,
This causes a problem that the burden of maintenance costs increases. Also, trying to avoid this will force the ski resort to shorten in business hours.

Therefore, it becomes necessary to cut off the geothermal heat and reduce the amount of snowmelt. Therefore, it is conceivable to lay, for example, a tatami mat or a muscillo as a heat insulating material between the ground and the snow. However, in this case, so-called snow-melting water generated by melting snow is absorbed by the tatami mat and the muscillo. Since water easily transfers heat, this water reduces the heat insulation effect of tatami mats and muscillo, transfers the geothermal heat upward, and the snow melts due to this heat.

Further, these tatami mats and muscillo are easily corroded by long-term use.

Furthermore, even if a large and inflexible member such as a tatami mat is laid on a ski resort with a lot of undulations, or a lightweight muscillo is laid on the slope of a ski resort, it is easy to move due to an external impact.

[Means for Solving the Problems] In the present invention, the following means were taken in order to solve the various problems described above. That is, the present invention is characterized in that the synthetic resin foam particles are stored in a water-permeable synthetic resin bag, the storage body is laid on the ground, and the sliding mat is laid on the storage body. And

[Operation] It is known that the expanded beads of synthetic resin have excellent heat insulating properties. By storing the foamed particles in a bag and laying the storage body on the ground, the conduction of geothermal heat to snow is blocked. Furthermore, the bag allows water to pass through. Therefore, the snowmelt water penetrates into the ground through this bag. Moreover, it may penetrate into the ground through the space between the adjacent storage bodies. Thereby, the snow melting water does not reduce the heat insulating effect of the foam.

Furthermore, since the foamed particles and the bag are made of synthetic resin, the container formed of these has excellent corrosion resistance and can be used semipermanently.

Further, by laying the sliding mat on the storage body, the storage body is stabilized, so that the storage body does not easily move due to an impact from the outside.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, G is the ground of the ski slope in the ski area. Reference numeral 22 is a container in which a large number of foam particles 10 are housed in a bag 12 made of synthetic resin. As the expanded particles 10, pre-expanded polystyrene particles expanded 30 to 50 times are used. The bag 12 is made of synthetic fiber woven fabric, knitted fabric, etc. and has water permeability. And the storage body 22
Is formed to have a size of, for example, 50 cm in length and 20 cm in width. Reference numeral 24 denotes a synthetic resin sliding mat whose upper surface is formed as a ski sliding surface, and S is snow.

A large number of the above-mentioned storage bodies 22 are prepared on the slope of a ski resort, and they are laid out on the ground G in both vertical and horizontal directions. further,
The mat 24 is laid on the storage body 22. The housing 22 and the mat 24 constitute the snow melting prevention structure of the present invention.

The sliding mat 24 is composed of a synthetic resin mat structure 17. As shown in FIG.
Has a substantially square ring shape with a side of a dozen centimeters in a plan view, and has a thickness of 2 to 3 centimeters. In addition, on the upper surface of this structure 17, the length 2
A large number of thin rod-shaped protrusions 18 of about 3 cm extend upward. Further, a T-shaped engaging portion 19a is provided on the outer edge of the pair of corners of the structure 17 facing each other so as to project outward. In addition, engaging holes 19b that engage with the T-shaped engaging portions 19a are provided inward at the outer edges of the other pair of corners of the structural body 17 that face each other. The T-shaped engaging portion 19a of one mat component 17 is engaged with the engaging hole 19b of another mat component 17 adjacent to the T-shaped engaging part 19a.
Will be connected vertically and horizontally. In this way, the connected body of the mat structure 17 is formed to have a predetermined width, and this is used as the sliding mat 24.

Foam granules 10 of synthetic resin have excellent heat insulation and
It is possible to prevent the snow S from melting due to geothermal heat by storing the storage body 22 in the ground and laying the storage body 22 on the ground G. The bag 12 allows water to pass through. Therefore, the snowmelt water penetrates into the ground through the bag 12. Further, it may penetrate into the ground from between the adjacent storage bodies 22.
As a result, the snow melting water reduces the heat insulating effect of the storage body 22, and there is no possibility of transmitting the geothermal heat upward, and the heat insulation effect of the storage body 22 can be maintained.

Further, by laying the sliding mat 24 on the storage body 22, the storage body 22 is stabilized. Therefore, the container 22 is not easily moved by an impact from the outside.

Further, the container 22 is a bag 12 filled with a large number of foam particles 10. Therefore, even if the container 22 receives a local pressure from the stock, the foamed particles 10 that have received this force flow in the bag 12 and relieve the received pressure. This can prevent the stock from damaging the bag 12 and the foam particles 10.

Note that gravel may be laid on the ground G in order to accelerate the removal of the snowmelt water.

Further, in the present embodiment, the expanded beads 10 are pre-expanded polystyrene foam particles, but the present invention is not limited to this, and crushed particles of used foam may be used.

The bag 12 may be a bag made by sewing a synthetic resin porous sheet.

In addition, a mat structure 17 that constitutes the sliding mat 24.
Although a square quadrangular shape is used, the shape is not limited to this, and a circular shape may be used.

The housing 22 and the sliding mat 24 may be laid on the entire surface of the ski slope, or may be laid only on a portion where the amount of snow melt is relatively large.

In addition, all the embodiments belonging to the scope of claims for utility model are within the scope of the present invention.

[Effect of the Invention] The storage body laid on the ground blocks the transfer of geothermal heat to the snow. As a result, it is possible to prevent melting of snow due to geothermal heat.

Furthermore, since the snowmelt water quickly penetrates into the ground, the water does not reduce the heat insulating effect of the container.

Further, since the container is made of synthetic resin, it has excellent corrosion resistance and can be used semipermanently.

Furthermore, by laying a sliding mat on the storage body, the storage body is stabilized and the storage body does not easily move due to an external impact.

Further, the stock does not damage the container.

Therefore, even in a ski area where the amount of snowfall is small or where geothermal heat is high, it is possible to always secure snowfall suitable for skiing. This eliminates the need for frequent spraying of artificial snow for replenishment and reduces maintenance costs. It is also possible to extend the business hours of the ski area.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a main part, and FIG. 3 is a plan view of a mat structure. G ... Ground, 10 ... Foamed particles, 12 ... Bag, 22 ... Storage body,
24 …… Sliding mat.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoji Shinohara 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Motoaki Miyazaki 4-chome, Megurohonmachi, Meguro-ku, Tokyo No. 7 (72) Inventor Hiroyasu Ogata 2-6-1, Namiki, Kanazawa-ku, Yokohama-shi, Kanagawa 402 (72) Inventor Yoshikatsu Tani 2-16-8 Yuyamadai, Kawanishi-shi, Hyogo (56) References Special Kaihei 3-166404 (JP, A) Japanese Unexamined Patent Publication No. 3-68381 (JP, A) Actual Open Sho 53-146234 (JP, U) Japanese Patent Sho 43-11628 (JP, B1) Actual Sho 38-12775 ( JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin bag capable of passing water, in which synthetic resin foam particles are stored, the storage body is laid on the ground, and a sliding mat is laid on the storage base. Snow melting prevention structure for ski resorts.