FI76395B - ANORDNING FOER JAEMNING AV SANDSKIKT. TRANSFERRED PAEIVAEMAEAERAE - FOERSJKUTET DATUM PL 14 ç 26.04.84 - Google Patents

Description

1 76395

Sand leveling device - Anordning för jämning av sandskikt

The invention relates to an apparatus for leveling a layer of sand at the point of descent of various types of jumps, having a carriage reciprocating along rails arranged on each side of the layer of sand and provided with a leveling member for scraping the surface of the sand and extending over the layer of sand. As the device moves over the sand surface, the leveling member scraping collects the sand spilled at the descent of the jump and the sand add-on required from the paddling after leveling the sand layer.

As the race lasts, the surface of the descent will be depressed as a result of the jump jumper’s exit marks and gauge marks. This happens when the sand is wet, especially in rainy weather. Since the jumper meets the descent at an angle of about 45 °, each change in the level of the descent causes differences in the lengths of the jumps.

If the depressed surface is lifted to a horizontal level (0 level) from time to time by adding sand, it will suffer the most after lifting. Similarly, jumping before leveling has benefited the most. If no leveling is performed at all, there will be "prolonged" jumps towards the end of the race. Irregular leveling from time to time may also provide an opportunity for "pulling home" in major international competitions, etc.

Thus, in order to determine the correct length of the jump, it is absolutely essential that the surface of the descent is exactly the same level during each jump throughout the race.

It is possible to detect and correct the deviation using the device described below.

7 6 3 9 5 2

A device as described above is disclosed in German application 24 48 830. In addition to the leveling member, the device is provided with wing-like members arranged transversely in the sand layer, which form a rake member at the same horizontal level flattens the top surface of the layer.

With this known device, the surface of the sand is basically smoothed. Due to the rakes, the device is cumbersome to use and requires a relatively large amount of force. In addition, since there are a relatively large number of rake members, there is always a risk that when they roam the sand layer, they at the same time cause such a high resistance that the device rises from the support rails, so that the leveling is not perfect. The rakes form large grooves and grooves in the sand layer, which cannot be leveled by the leveling member in the direction of movement alone in all cases.

In addition, as the jumping performance continues, the sand layer at the landing site gradually compacts and its upper surface is depressed. The known device does not provide any solution to this problem.

The object of the invention is to provide a device with which the upper surface of the sand layer can be leveled in a simple and reliable manner each time to the same horizontal or 0 level, and with which the depressions of the sand layer can also be corrected.

The device according to the invention is characterized in that the carriage is provided with a sand addition and / or collecting member and that the leveling member is hinged so that as the carriage moves from the rear end of the descent towards the front the leveling member sandy surface.

In this position, the leveling member transfers the surplus replenishment sand to the destination sandbox while leveling the sand surface.

The sand addition and / or collecting member may consist of a sand tank from which the additional sand is directed to the desired location, or it may consist of a collecting plow having a V-shape opening in the leveling direction. With such a collecting plow, the sand piles that have risen from the level of the sand surface as a result of the jump can be collected and moved along as the device moves over the sand surface. Due to the shape of the plow, as the movement continues, sand accumulates at the bottom of the V, which is intended to be placed in the area of the sand surface to be leveled by arranging the plow lowering point to be moved in the transverse direction. As the device moves over the pit formed on the sand surface, the sand accumulated at the bottom of V fills this pit. If necessary, add sand from the sand tank.

At the same time, the lower edge of the plow also acts as a leveling member for the sand layer, i.e. the lower edge of the plow is horizontal and positioned so that it, like a scraper, wipes the surface of the sand. Both the height and the slope of this lower edge are adjustable so that the sand surface is brought to the desired level and horizontal.

In addition, the device may be equipped with sand tanks to add sand to the descent pit or other objects at the descent location, e.g., footprints and the like, as needed.

The invention will be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a schematic view of a leveling device according to the invention, Figures 2, 3 and 4 show the operating principle of the device according to Figure 1 when leveling a pit in a sand layer.

Figures 5 and 6 show a practical application of the device according to the invention.

Figures 1-4 show a device according to the invention, in which the parallel rails 1 arranged on each side of the jump descent point have a reciprocating carriage 2 with a front member having a sanding member 6 extending transversely and over it. The rails 1 extend beyond the end of the descent completely moved away from the landing site. After the jump, the device is moved outside the end of the entry point, where it can be covered with a cover to prevent injury.

The device has a plow 4 suitable for collecting and leveling sand, which means that it consists of a collecting V-shaped plow that opens in the direction of movement. While the lower edge of this collecting plow 4 as the carriage moves from the end of the landing point towards its front acts as a leveling member. As the movement continues to the bottom 7 of the V, sand collects and when the device 2 crosses the pit 5 formed in the sand, the sand collected by the plow 4 fills the pit 5. After the device 2 moves leveling member and draws with it the excess sand accumulated at the front edge of the pit, which is transported with the device 2 to the sand storage located at the end of the landing point.

The base 7 of the plow 4 V can be provided with a sand addition device, by means of which the downcomer 5 5 76395 formed on the sand surface can be efficiently filled and at the same time the depression of the sand surface can be compensated by additional sand. This addition of sand can be further enhanced by equipping the sled with one or more sand tanks mounted on the rear beam 8, from which the sand is allowed to drain, if necessary, into the depressions of the footprints on the side parts of the landing site.

The device can be made to be moved manually or it can be equipped with suitable actuators, for example an electric motor. At the same time, the addition of sand can also be made automatic or manually controlled.

In Figures 1-4, the sled rests on rails 1 on wheels. It is clear that the wheels are not necessary, but the carriage can be moved immediately along the rails 1 on the beam 8.

Figures 1-4 show a basic solution of the invention, in which the sand collecting member consists of a collecting plow, the width of which mainly corresponds to the width of the landing site. The width of the leveling members also naturally corresponds to the width of the surface to be leveled.

Figures 5 and 6 show a practical embodiment of the invention, in which the width of the collecting plow is only a part of the width of the area to be leveled, but which plow is displaceable in the transverse direction of the lowering point.

The device according to Figures 5 and 6 consists of a carriage 2 resting on parallel rails 1 arranged on both sides of the exit point 6. This carriage consists of two spaced parallel beams 8 connected by supports 9 placed at the ends of the beams 76. This carriage-like structure rests on the upper rails 6 , in which case the contact surfaces can be suitably rounded or otherwise treated so that the carriage slides easily on the rails. The lower surface of the beams 8 has guide pins 20 which prevent the carriage 2 from slipping off the side rails 1. The pins can also be provided with guide rollers or other similar guide members which ensure that the carriage stays on the rails and slides in a directional manner.

A collecting plow 4 is placed between the two beams 8.

The width of this plow is only a fraction of the width of the landing site. The plow 4 is adjustably arranged on the carriage 2 so that at the free end of the branches of the plow member 4 there are grooved holders 17 allowing lateral sliding and correspondingly at the bottom part 7 of the plow there is another similar grooved holder 16 on which the plow member 4 can be moved along the beams 8. The lower edge of the plow member 4 is in contact with the surface of the sand layer 6. The plow member is provided with cavities in the vicinity of the front beam 8, which allow the leveling member 3 placed at the front edge to be turned up.

In addition, the bottom part 7 of the plow member is provided with a tank 19 for additional sand. Its bottom 18 is adjustable so that the sand in the tank 19 can be drained onto the surface of the sand layer 6, to fill the gap created in the pit.

A pivoting leveling member 3 according to the invention is arranged in the front beam 8 of the carriage 2, as in the device according to Figures 1-4. The height of this leveling member 3 can be adjusted by means of a tightening arc 11 arranged in the front beam 8 and an associated adjusting screw 12. If the length of the span is required, several adjusting screws can be used. By tightening the adjusting screw 12, the possibly downwardly bent front beam 8 76395 7 can be aligned horizontally. In this case, the leveling member 3 attached to the front beam 8 also straightens accordingly.

To facilitate the transport of the device, the long parts 2, 3, 8f 10, etc. of the device can be constructed as interconnected parts. In this case, the leveling member 3 can be assembled from several parts, which must be placed slightly overlapping each other.

In order to determine the horizontal position of the leveling member 3 and to correct any error, the front beam 8 is provided with a projection 15 for a spirit level 14, one end of which is placed on the projection 15 and the other end on the rail 1. The leveling member 3 can be easily adjusted horizontally.

Behind the rear beam 8 of the sled 2 shown, a sand container 10 is placed over its entire width for filling small pits (footprints). From the sand tank, sand can be easily and, if necessary, drained to the depressions. The excess sand is transferred by the leveling member 3 to the sand collection store at the rear. The container shown can be divided into separate independent container parts or it can be assembled from these. With such a structure, the sand can be efficiently drained to the desired location.

The bottom of the container 10 or containers is preferably funnel-shaped.

Alternatively, the sand container 10 or containers can be placed in front of the rear beam 8, in which case care must be taken to allow the carriage to move in the transverse direction.

In the embodiment shown in Fig. 5, the rear beam 8 is provided with an additional leveling member 13, which smooths the side marks and with which the sand drained from the sand tank 10 is applied to the surface of the sand layer 6 of the entry point to smooth the marks.

The device according to Figures 5 and 6 operates in the same way as the device according to Figures 1-4. However, in the device shown, the plow member 8 76395 itself is placed in the transverse direction visually or through a number distribution pit made at the front edge of the descent position, following the assumed line at the point at which the descent point is to be leveled and leveling is performed. At the same time, the sand tank 19 in the plow can be used and additional sand can be drained from it as needed. As the device moves to the side of the actual descent pit of the leveling beam, other traces formed, such as footprints, can be filled with sand drained from the additional sand tank 10.

Upon return, the leveling member 3 flattens the pits filled with additional sand and transfers the excess sand to the collection box at the rear. The device shown can be operated manually, for example by means of suitable push rods at both ends, or it can be motorized and its functions, weak addition, smoothing, and the like can be connected to the motor operation of the device.

After leveling, the device according to the invention returns to the end of the landing point where it is serviced, sand is added to the tanks as needed and the horizontal level of the leveling member 3 is checked, etc.

With the device according to the invention, the sand surface can be leveled simply and efficiently, whereby at the same time it is ensured that the sand surface is always at the height of the effort plank and in a horizontal plane.

The device according to the invention can thus be operated manually or it can be equipped with a suitable operating device and automated. In addition, a jump length measuring member or a jump length sensor or the like can be added to the device, for example.

Claims (7)

1. Device for planing the sand layer at the drop-off point for various jump branches, in which. there is a sledge (2) which moves back and forth on rails (1) arranged on both sides of the sand layer, which sled is provided with a sanding surface scraping and extending over the sand layer (3), characterized in that the sledge (2) ) is provided with a sand supply and / or collection means (4) and that the planning means (3) is articulated stored. so that when the sledge moves from the rear end end of the landfill towards the front end, the planning means (3) imitate the roughness of the sand surface and have during the return movement in a permanent planning position and plan the sand surface in a manner known per se. Device according to claim 1, characterized in that the lower and the supply means (4) are lower at the same time. acts as a sanding layer (6) leveling part. Device according to claim 1 or 2, characterized in that the sand supply and / or collecting means (4) consists of a collecting plow (4), which has the shape of a V, which opens in the planning direction. Device according to claim 3, characterized in that the plow (4) is movable in the transverse direction of the fallout in the area between the rails (1). Device according to claim 1, characterized in that the supply and / or collection means (4) is formed by a sand container (19). Device according to any of the preceding claims, characterized in that the sledge (2) is provided with one or more sand containers (10) for supplying extra sand to the deposition site sand layer (6).