JPH0311321B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a plastic runway, and more particularly to a plastic runway consisting of an integral surface of plastic elements held on the ground surface. be.

[Conventional technology]

Plastic tracks of this type are conventionally known in the art. The plastic running track has a plurality of plastic elements each having a flexible protrusion on the upper surface, which are interconnected and integrated to form one running track. Each plastic element is fixed by means of fixing means, and the running track is arranged on the ground surface. To prevent weeds from growing under each plastic element, felt mats are often placed.

[Problem to be solved by the invention]

Plastic tracks of this type, more particularly plastic tracks for skiing, have the significant disadvantage that atmospheric temperatures cause the plastic to expand, often resulting in an uneven surface. Under particularly severe conditions, delamination of the elements may also occur, making them dangerous to use.

Furthermore, the known plastic tracks have the disadvantage that the plastic elements are interconnected, which makes the effect of the plastic elements difficult and labor-intensive. On the other hand, if the plastic elements are assembled without being interconnected, this would result in undesirable sagging between the elements, so that they cannot be used without interconnection.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a plastic track, in particular a plastic track for skiing, which overcomes these problems of the prior art.

[Means to solve the problem]

The above-mentioned object of the present invention is to provide a first surface provided with a plurality of protrusions serving as a contact surface of a sliding body such as a ski;
A plurality of thermoplastic and elastic plastic elements, each having a second surface provided with a fastening means, and each plastic element being aligned longitudinally and horizontally with a gap between adjacent plastic elements. Each of said plastic elements comprises a lattice-structure reinforcing support constituted by knitting metal rods for arranging and fixing, and means for fixing said reinforcing support to a support surface on the ground. This is achieved by a plastic running track, characterized in that the reinforcing support is provided with the fastening means fastened to each metal rod forming the lattice structure of the reinforcing support.

In the plastic running path with the above configuration, the reinforcing support with a rigid lattice structure with a predetermined space between the rods is not affected by the ground as a placement surface, so each plastic element is It can be easily held in the desired form. Each of these plastic elements is also fixed to the reinforcing support of the lattice in such a way that they are not interconnected and can be easily removed if necessary. Therefore, if a plastic running track of this type requires any repairs, this can be carried out very quickly and easily.

A gap is created and maintained between each plastic element fixed to the reinforcing support of the lattice structure, so that the element itself can expand and thus the surface of the track due to temperature differences. Undesirable deformation of the can be prevented.

According to the invention, the reinforcing support of the lattice structure is advantageously formed from metal rods, preferably in the form of a wick structure. By creating a wicker structure with reinforcing metal rods in this way, the weight of the reinforcing supports of the lattice structure can be reduced without affecting the support of each plastic element in any way, and this can be carried out deep underground. This provides the excellent advantage of preventing sinking.

Furthermore, the plastic elements are easily attached to the metal rods in the reinforcing support of the lattice structure by means of a fastening action, without interconnecting the elements, so that they are not susceptible to wear or damage. The plastic element was
It can be replaced extremely easily and quickly.

In a preferred embodiment, the plastic element according to the invention for use in plastic tracks, in particular ski runs, has fastening means for fastening to the reinforcing supports of the rigid lattice structure.

[Effect]

In this invention, a reinforcing support with a lattice structure made of a plurality of metal rods fastens and supports each of the plurality of plastic elements, and the fixing means fixes and installs the reinforcing support on the ground. The elements are reinforced with supporting pairs at the front and rear,
They are aligned in the left and right direction to form a running path,
Furthermore, the fastening means fasten each plastic element to the reinforcing support spaced apart from each other so that they are not in expandable contact with each other.

〔Example〕

Hereinafter, one embodiment of the plastic running track according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an inclined running track 1 consisting of a plurality of plastic elements 2 according to this embodiment, and on the upper side of each said element 2 a plurality of flexible plastic projections of thin wire. 3 is formed, and the back side of each element 2 is provided with a recess 9 divided by a rod part or beam 8, and is reinforced by a fastening member 4 integrally protruding from each required part. It is concluded in support pair 5.

The reinforcing support body 5 is arranged in a lattice shape,
The reinforcing metal rods 6 are made of iron or aluminum and have a diameter of preferably about 2 to 7 mm, more preferably about 3 mm. The plastic elements 2 are braided in a lattice shape with gaps for fastening and arranging them front to back, left and right with a predetermined gap between them, and reinforcing parts are formed to adapt to the slope of the ground, and separately. The fixing device is provided by embedding the rod end portions 10, which protrude downward from key points of the lattice shape, into the ground, but it is also possible to install it by means such as another fixing piece.

When the reinforcing support body 5 having the lattice structure formed by braiding the reinforcing metal rods 6 in this manner is used, the plastic running path can be fixed extremely well. In addition, the auxiliary maintenance body 5 of the lattice structure is made of braided reinforcing metal rods 6.
, there is no risk of it sinking deeply into the soil of the ground 7 due to its weight. Furthermore, as is clear from FIG. 2, which corresponds to the cross-section of the line in FIG. This makes it possible to carry out transportation with a smaller size.

The plastic element 2 is advantageously molded by injection molding from a thermoplastic elastic material, especially polyvinyl chloride containing a plasticizer, but polyethylene is also suitable as a material for this element. be. In addition, the first
In the configuration shown in the figure, the upper surface of the plastic element 2 has a plurality of flexible plastic protruding pieces 3 in the shape of thin wires, but instead of such members, a material suitable for skiing can be used. It is also possible to use other members.

If the plastic element 2 is damaged, the fastening state between the damaged element 2 and the lattice-structure reinforcing support 5 by the fastening member 4 is temporarily released, and the element 2 is replaced with a good one. This makes it easy to replace. and,
For the repair of this plastic track, in particular a plastic ski run, each element 2 is firmly fixed to a rigid lattice-structure reinforcing support 5 with fastening elements 4, even if:
Even if this plastic ski runway is a smooth slope course, the work itself is extremely easy and can be done quickly, which is convenient for the workers.

A particularly important advantage of the plastic track according to the invention is that damaged plastic elements 2 can be replaced very easily on the reinforcing support 5 of the lattice structure, which has already been fixedly installed.
Repairs of any kind are not necessarily troublesome and can be done by unskilled workers; each element must be fixed to a rod or the like driven into the ground. This is something that cannot be achieved with conventional plastic ski runway structures.

A further advantage of plastic ski runs is that, due to the fastening of each plastic element 2 to a reinforcing support 5 of the lattice structure, the elements 2 themselves can be made considerably stiffer, thereby making the ski run easier for ski runs. The total amount of plastic required for the assembly of the roadway elements 2 is small, which is extremely important from the point of view of the price of plastic.

In addition, if necessary, a foamed plastic layer 12 may be provided in the rod portion or recess 9 between the beams 8 on the back side of each plastic element 2.
The foamed plastic layer 1 can be filled with
2, one recess 9 can be successively filled into another recess 9. The element 2 can then be provided with a foamed plastic layer with a sealed surface that is strong enough to withstand the forces applied when skiing down the runway.

Furthermore, as can be seen in FIG. 1, each plastic element 2 has a reinforcing support 5 in the grid structure
In order to be able to dispose them without contacting each other, they are fastened with a gap 11 interposed between them. It is capable of absorbing the expansion of each element 2, and can prevent the formation of dangerous bulges due to adjacent elements 2 protruding upward due to expansion.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to effectively prevent surface deformation and layer peeling of the running path due to expansion of the plastic elements due to temperature differences. Further, the plastic running path of the present invention has excellent features such as the fact that the plastic elements are not connected to each other, so that replacement of the elements can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a ski runway to which an embodiment of the plastic running track according to the present invention is applied, and Fig. 2 shows reinforcing support of the plastic element and the lattice structure below the element. FIG. 1 is an enlarged cross-sectional view of the line in FIG. 1, showing the body. 1...Plastic running path, 2...Plastic element, 3...Plastic protruding piece,
4... Fastening member, 5... Reinforcement support with lattice structure,
6... Reinforcement metal rod, 7... Ground, 8... Rod portion or beam, 9... Recessed portion, 10... Rod end, 11... Gap, 12... Foamed plastic layer.

Claims (1)

[Claims] 1. A plurality of thermoplastic and elastic plastic elements each having a first surface with a plurality of protrusions that serve as a contact surface for a sliding object such as skis, and a second surface with fastening means; A reinforcing support body with a lattice structure constructed by braiding metal rods for aligning and fixing each plastic element in the front, back, left and right directions with gaps between adjacent plastic elements; means for fixing the reinforcing support to a support surface on the ground, each of said plastic elements being disposed on said reinforcing support such that said fastening means are fastened to respective metal rods forming a lattice structure of said reinforcing support; A plastic running track characterized by comprising: