SE457419B - SHOCK-ABSORBING LAYERS FOR TRAVAL AND BALL RUNS - Google Patents

Abstract

Shock-absorbent trotting tracks and horseracing tracks comprise the following layers: racing layer 1, bonded fibre fabric 2, shock-absorbent wood fibres 3, bonded fibre fabric 4, bearing/drainage layer 5 and sub-base with possible filling. The shock-absorbent wood fibre layer 3 is made of hard wood, possibly with the addition of fungicides and antibacterial agents, or softer wood, which is impregnated.

Description

457 419 10 15 20 25 30 35 2 properties should be able to reduce the requirement for the foundation thickness and drainage properties.

Variations in the properties of the lower and running layers should be easily regulated by changing the shock absorber the composition / thickness of the layer.

Previously known attempts to satisfy something of the above requirements have not proved sufficient and none of the hitherto patented solutions, such as Swedish patent 373 H00 or Swedish patent 307 967, has proved appropriate.

The Swedish patent 373 H00 describes a coating where shock-absorbing layers of bark are tested.

However, it rots quickly and has poor resistance against mechanical impact and absorbs water and is except almost waterproof. The use is small due to frequent replacement needs (decay) and in frost- during the period, the intended shock-absorbing effect ceases altogether.

The superimposed running layer also becomes precipitation in the event of precipitation completely soaked.

Attempts have also been made with tracks built of a mixed crushed stone material, needles and wood waste (branches, etc.).

These materials do not provide a satisfactory surface. The surface is difficult to maintain, the coating wears quickly due to of wear (internal friction in the mixture) and decay and thus becomes technically and economically of little use.

Swedish patent 307 967 describes a coating in which foam plastic or closed plastic cells are used as shock absorbent. However, it is very expensive and is difficult to stabilize and requires a bitumen or plastic-bonded surface layer. In practice, it has proved less suitable if at all useful for trotting and galloping banor.

They have also tried with birch bark chips connected by bitumen, the mend has proved expensive and is suitable only for small areas. The cover releases for otherwise through water poorly and creates surface problems at birth and thus the webs become soaked. The above 5 10 15 20 25 30 35 457 419 3 the coating (surface layer) may consist of asbestos or fiberglass bound in bitumen. This cover is therefore unsuitable for trotting and galloping tracks.

According to the present invention, a shock absorbent layers for trotting and galloping tracks which are is marked by the fact that the layer is separated with non-woven fabric from it the overlying running surface and possibly the underlying lying layer.

With the help of this layer the producer thus one path where the above requirements are met and where these do not work more expensive on the course's total price.

Further features of the invention appear from sub-requirements.

The invention is described in more detail with reference to the drawings, wherein: Pig. 1 shows a section through a shock absorber path according to the present invention.

Pig. 2 shows a limit value curve for running occupancy.

A trotting and galloping coating according to the present invention consists of a running layer 1 of natural gravel or crushed masses of thickness 8 - 29 cm and the running layer 1 is laid on top as a reverse filter with a grain size of 0 - 4 mm in the uppermost U - 6 cm and then in grain size 4 - 8 mm down to the desired depth.

Pig. 2 also shows the grain distribution curve for the running layer.

Under this running layer a non-woven fabric 2 is laid to separate the gravel layer from the shock-absorbing layer 3 as consists of mechanically produced wood fiber. The requirement for the fibrous material is an even distribution of fibers from 0 - 70 mm in length, 0 - H0 mm in width and 0 - 10 mm in thickness. This , is achieved by chipping with subsequent mechanical fiber rering. The wood can be new or cut from forestry or wood industry.

The wood fiber is made from hardwood, possibly fungicides and bactericides or from softwood impregnated. Necessary thickness of the wood fiber layer 3 457 419 10 U depends on the wood quality and other construction of the track, but is normally in the range 5 - 20 cm. At special courses for training, riding and for recovery after damage, the thickness of the wood fiber layer can be increased up to 30 - 40 cm. To prevent the wood fiber layer from being contaminated "of other masses a non-woven fabric 4 is also laid on the underside, but it can be abolished in particularly good basic conditions.

Under this non-woven fabric 4 then lies the usual support / drainage layer 5 of sufficient thickness and below this again plain mark 6.

Claims (4)

ïü 15 457 419 PATENTKRAV A shock-absorbing layer for trotting and galloping tracks, wherein the shock-absorbing layer is wood fiber, may be separated by a non-woven fabric (2, 4) from the overlying running layer (1) because the shock-absorbing layer (3) is and possibly the underlying layer (5). Shock-absorbing layer according to Claim 1, characterized in that the layer (3) consists of untreated wood fiber or wood fiber with added fungicidal or bactericidal agents. Shock-absorbing according to claims 1 - 2, characterized in that the wood fiber is made of impregnated softwood. Shock-absorbing layer according to claims 1 - 3, characterized in that the layer consists of mechanically produced wood fiber.