JP2001131934A - Maintenance device for ski jumping landing slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly finish the sliding surface of a landing slope to a flat surface in a short time and keep it in the best condition. SOLUTION: This maintenance device for ski jumping landing slope comprises a pair of guide rails 1 provided in parallel with a space, a reciprocating base 2 provided movably between the guide rails 1, a sliding base 3 provided on the upper surface of the reciprocating base 2 in such a manner as to be movable across the guide rail axial center, and a snow removing and pressing machine 13 loaded on the sliding base 3. The snow removing and pressing machine 13 has a snow removing plate 15 for scooping the snow on the sliding surface and a snow pressing plate for compacting the surface after the snow removal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for maintaining a landing bar attached to a jumping hill for ski jumping in a desired condition.

[0002]

2. Description of the Related Art In general, a landing bar attached to a jumping hill for a jumping competition is formed by using a natural steep slope below a jumping hill 34 to which a competitor approaches, as shown in FIG. The landing barn 33 is provided with a breaking zone 35 which slides after landing, and extends long while maintaining a substantially constant width. The landing barn 33 refers to an area where a competitor who has jumped high in the air from the jumping stand 34 lands and slides. After the player has decided to land, the competitor goes to the breaking zone 35 in front of the landing barn 33 and makes a steep slope. You have to keep glide at a considerable speed. Irregularities in the landing and running surfaces can lead to an unforeseen event, such as a fall, for the competitor. In addition, the competition results are also the landing point,
The entire landing burn area should be uniformly flat prior to the start of the competition, as it depends on the condition of the running surface,
It is also necessary to maintain the stiffness in the desired condition without shortage.

[0003] Usually, maintenance of a landing burn relies on manpower. A large number of maintenance workers enter the steep sloped landing barn, and use the snow remover to remove the snow that has accumulated in the area where they are assigned and flatten it. In particular, the landing point and the running surface will be finished more carefully than other areas. After snow removal is complete, a number of skiers repeatedly slide through the landing barn, solidify and finally finish.

[0004]

In the current snow removal work by maintenance personnel, despite the fact that many people (for example, 20 people) are put in, the work does not proceed efficiently because it involves a lot of danger on steep slopes. Maintenance time is prolonged.

[0005] In addition, in particular, although the landing point and the running surface must be finished to have a flat surface without unevenness, the difference in the degree of snow removal occurs due to the difference in maintenance staff in each area, Unable to finish uniformly flat surface.

On the other hand, there is a maintenance method in which a snow plow (with a winch) is run only in an area having a gentle slope, instead of the snow removal work by a maintenance person having such difficulties. However, in the maintenance using a snow plow, sufficient skill is required for the driving operation, and the snow plow cannot always be used.
For example, when an unfamiliar person drives and operates a snow plow, it is difficult to flatten the surface, and a defective portion with a large step is generated, which rather requires maintenance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a jumping bar landing bar maintenance device which makes it possible to finish the running surface of the landing bar uniformly and quickly in a short time and to maintain the best condition.

[0008]

SUMMARY OF THE INVENTION A jumping stand landing bar maintenance device according to the present invention is provided with a pair of guide rails which are spaced apart from each other along a direction in which the landing surface of a landing bar extends and are provided in parallel with each other. A carriage provided movably in the direction of the guide rail axis so as to extend between the slide table and a slide table provided on the upper surface of the carriage so as to be movable in a direction transverse to the guide rail axis and having a snow removing snowplow; A driving mechanism for driving the carriage with a wire rope connected to the carriage, and driving means for driving the slide table with a chain connected to the slide table. The snow removal snowplow scoops up snow on the sliding surface of the landing barn. It has a snow compaction board that hardens the exposed surface after removing snow, and is configured so that snow can be compacted simultaneously with the snow compactor during snow removal with the snow remover. That.

In the present invention, the snow removal plate of the snow removal snowplow is sent to a pre-measured finishing reference position inside the snow cover, the snow on the running surface is picked up by the snow removal plate, and the snow is dropped down the slope. During this snow removal, the carriage moves forward, and the snow picked up by the snow removal board continuously falls down the slope. At the same time, the snowboard moves forward and the surface of the snow is pressed and hardened uniformly. The same snow removal and snow removal are repeated several times by changing the position of the snow removal board mounted on the slide table movably provided on the carriage, so that the running surface of the landing barn is finished in a desired condition.

[0010] When the running surface is maintained using such a maintenance device, it becomes possible to finish the desired condition in a much shorter time than in the conventional method.

Further, the same position can be maintained for the snow removal plate and the snow removal plate of the snow removal snowplow, and a uniform and flat surface can be obtained without unevenness over the entire sliding surface. In addition, it is possible to maintain a hard and desirable condition.

Further, the present invention desirably includes a snow removal plate, a snow removal plate, and a lift device for raising and lowering the snow removal plate by a chain connected to the lift body.

In the present invention, the provision of the lift device makes it possible to smoothly raise and lower the snow removing plate and the snow compaction plate regardless of the snow condition on the running surface.

Further, the present invention is preferably such that the carriage has rotatable traveling wheels mounted on guide rails, respectively, and moves while running the traveling wheels along the guide rails while the carriage is moving. Constitute.

In the present invention, since the carriage is provided with the traveling wheel, the movement along the guide rail can be kept smooth, and the snow removing operation can be efficiently performed.

Further, the present invention is preferably arranged such that the carriage is provided in parallel with the guide rail axis in a transverse direction.
Each of the slide tables has a rotatable traveling roller mounted on the beam and is configured to move while running the traveling roller along the beam while the slide table is moving.

In the present invention, by providing the slide table with the traveling roller, the movement along the beam can be kept smooth, and the snow removing operation can be efficiently performed.

Further, according to the present invention, preferably, the driving mechanism includes a tension weight.

In the present invention, since the driving mechanism includes the tension weight, the traveling can be stably maintained even when the load greatly changes during the movement of the carriage.

[0020]

Embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, a jump stand landing burn maintenance device is separated from each other along the direction of extension of the landing surface of the landing burn, and a pair of guide rails 1 provided in parallel, and a guide rail axial direction extending between the two guide rails 1. And a carriage 2 movably provided on the carriage. The guide rails 1 are separated from each other by a distance corresponding to the entire width of the running surface, and are arranged obliquely according to the inclination angle of the landing barn.

Further, the carriage 2 is provided with a driving mechanism described later, and runs traveling wheels (described later) on the guide rail 1.
It is configured to reciprocate. Further, a slide table 3 is provided on the upper surface of the carriage 2 so as to be movable in a direction transverse to the axis of the guide rail. The slide base 3 is mounted with a snow removing snowplow described in detail later. The slide base 3 is provided with a driving means described later, and runs a traveling roller (described later) on the carriage 2 so as to be able to move to both ends of the carriage 2.

A drive mechanism 4 is connected to the carriage 2. The driving mechanism 4 includes a winch 5, a wire rope 6,
A plurality of guide pulleys 7, a tip wheel 8, a carriage pulley (described later), a plurality of auxiliary pulleys 9, and a rope clamp 10 are provided. Here, the wire rope 5 is returned from the drum of the winch 5 through the guide pulleys 7 by the tip wheel 8, wound around the carriage pulley, and passed through the auxiliary pulleys 9 to return to the drum. The tip wheel 8 is connected to the hydraulic cylinder 11 and can freely expand and contract by the operation of the hydraulic cylinder 11. The drive mechanism 4 is provided with a tension weight 12 for ensuring safety when an abnormal load occurs on the carriage 2 and stabilizing the running.

On the other hand, FIG. 2 shows the details of the snow removing snow plow mounted on the slide base 3. The snow remover 13 includes a snow remover 15 and a snow remover 16 that move up and down along a beam 14.
It has. The snow removing plate 15 has a certain width so as to efficiently remove snow on the sliding surface. In addition, the snow compaction plate 16 presses and hardens the exposed surface under the snow removing plate 15 after removing snow.

Further, the snow removing snowplow 13 is provided with a lifting device 17 for raising and lowering the snow removing board 15 and the snow removing board 16. The lift device 17 includes a lift main body 18, a handle 19, a chain 20, and a sprocket 21. The chain 20 is pulled from the sprocket 21 by turning the opposite sprocket (not shown) through the engagement portion of the lift body 18. The snow removing plate 15 has a guide roller 22 for keeping the ascent and descent smooth.

On the other hand, a driving means 23 is provided on the slide base 3. The driving means 23 includes a motor 24, a chain 2
5 and a sprocket 26. Here, the chain 25 is moved from the sprocket 26 to the slide base 3.
It is pulled by turning a sprocket (not shown) through the meshing portion.

The slide table 3 has four running rollers 28 respectively mounted on the two beams 27 of the carriage 2.
(Two are shown in FIG. 2), and four side rollers 29 that abut against the side surface of the beam 27 and guide the slide table 3
(Two are shown in FIG. 2). Furthermore, the carriage 2 has a plurality of carriage pulleys 30 around which the wire ropes 6 are wound.

The carriage 2 has four running wheels 3 in total.
1 (two shown in FIG. 2)
Are driven, the respective running wheels 31 rotate and can smoothly move on the guide rail 1. In the drawing, reference numeral 32 denotes a rail snow removing plate for removing snow accumulated on the rail 1.

The present embodiment has the above-described structure, and is used to improve the landing surface of the landing barn.
Is started, the carriage 2 is moved along the guide rail 1 and placed at the rear end of the maintenance device (on the side of the jump table), and the motor of the winch 5 is stopped. The motor 24 at the lower part of the slide base 3 is started, and the slide base 3 is moved along the beam 27 to be almost at the center of the maintenance device (about the center of the landing burn), and the motor 24 is stopped. Carriage 2
While the slide base 3 is moving, the handle 19 of the snow plow 13 is operated, and the chain 20 is turned to raise the snow plow 15 and the snow plow 16 to maintain their positions.

The landing barn 33 corresponds to FIG.
As shown in FIG. 5, generally, a breaking zone 35 is provided below a jump table 34, which is made using a natural steep slope, and slides after landing. The landing barn 33 and the breaking zone 35
Extend linearly, and extend long while maintaining a substantially constant width. When the snow cover is almost constant without any extreme deviation in the width direction of the running surface, snow removal is started from the center of the landing barn 33, and the snow is removed several times from the center to the end. On the other hand, if the amount of snow on one side is extremely large due to the direction of the wind during snowfall, the snow is removed several times starting from the side with the larger amount of snow and going to the opposite side.

Once the position of the snow plow 13 has been determined,
The motor of the winch 5 is started, and the handle 19 is operated to feed the snow removal plate 15 of the snow removal snowplow 13 into the snow cover so as to lower the snow on the sliding surface down the slope. The finishing reference position is located deep inside, and is measured using a predetermined measuring tool, and the feeding distance is determined to accurately feed the snow removing plate 15. The carriage 2 moves forward as the wire rope 6 of the drive mechanism 4 is extended, and at this time, the snow removal plate 1
The snow scooped in 5 falls continuously down the slope. In addition, the snow compaction plate 16 also moves forward at the tip of the snow removing plate 15, and at this time, the surface of the snow is pressed and solidified uniformly.

The carriage 2 moves to the end of the guide rail 1 in front of the maintenance device, and the first snow removal is completed. Return the carriage 2 to the end of the maintenance device again, where the motor 2
4 is started, the slide base 3 is moved toward the front end of the landing barn, the position of the slide base 3 is determined, and the motor 24 is stopped. The carriage 2 is moved forward again, and the snow is removed by the snow removing plate 15, and at the same time, the surface of the snow is hardened by the snow removing plate 16.

The above snow removal process is repeated to remove snow over the entire width of the landing surface of the landing barn and to remove snow. For example, as shown in FIG. 3, if the entire width of the running surface is within 15 meters, when the snow removing plate 15 having a width of about 3 meters is used, the carriage 2 is reciprocated five times to remove the snow from the landing barn and to remove the snow. Can be completed.
Compared to the conventional maintenance method in which 20 maintenance workers take only two days with relatively simple snow removal alone, when maintenance is performed using the maintenance device of the present invention that simultaneously performs snow compaction,
In 6 to 8 hours, the running surface can be finished to a desired condition.

When the maintenance device is not used for maintenance of the running surface, the carriage 2 and the slide table 3 are desirably moved to the rearmost storage position of the maintenance device, and fixed by a fixing means so as not to move there. Fix it. In particular, these parts must not move from the rearmost position during the competition. FIG. 4 shows the carriage 2, the slide table 3, and the snow removing plate 15 moved to the storage position. There is no possibility of contact with the competitor at a position close to the cante, and there is no concern that the maintenance device will compromise safety.

As described above, in the present embodiment, the snow removal plate 15 and the snow removal plate 16 of the snow removal snow removal machine 13 are kept at the same position to remove snow over the entire running surface, and at the same time, the surface is pressed. No, can be finished to a uniformly flat surface. In addition, it is possible to maintain a hard and desirable condition.

Further, it is possible to carry out the operation of snow removal and compaction snow very efficiently by a machine.
The maintenance time can be significantly reduced as compared to the conventional method using a large number of personnel.

Further, since there is no need for a large number of maintenance personnel to enter a steep slope, safety in maintenance work can be significantly improved.

[0037]

According to the present invention, the snow removing plate and the snow compacting plate are kept at the same position to remove snow over the entire surface of the sliding surface, and at the same time, snow is compacted on the surface. It is possible to finish. Therefore, according to the present invention, it is possible to maintain the best condition without causing an unexpected situation such as a fall. Also,
Maintenance time can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a jump hill landing burn maintenance device according to the present invention.

FIG. 2 is a side view showing details of a slide table and a snow plow shown in FIG. 1;

FIG. 3 is a perspective view illustrating an example of a jump stand landing burn.

FIG. 4 is a diagram illustrating a carriage, a slide table, and a snow removal plate that have completed movement to a storage position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Guide rail 2 ... Carousel 3 ... Slide table 5 ... Winch 6 ... Wire rope 13 ... Snow remover 15 ... Snow remover 16 ... Snow remover 17 ... Lift device 20, 25 ... Chain

Claims (5)

[Claims] 1. A pair of guide rails spaced apart from each other along the direction of extension of a landing surface of a landing burn and provided in parallel, and movably provided in a guide rail axial direction so as to extend between the two guide rails. And a slide table provided on the upper surface of the slide table so as to be movable in a direction transverse to the axis of the guide rail and having a snow removing snowplow, and the slide table is driven by a wire rope connected to the slide table. And a driving means for driving the slide table by a chain connected to the slide table, and the snow removing snowplow scoops up snow on the sliding surface of the landing barn and exposes after removing snow. A jumping bar landing bar having a snow compaction plate for solidifying the surface, wherein the snow compaction plate can simultaneously perform snow compaction during snow removal with the snow removal compaction plate. Maintenance equipment. 2. The apparatus according to claim 1, wherein the snow removing snowplow includes a lifting device that lifts and lowers the snow removing plate and the snow pressing plate by a chain connected to a lift body. 3. The carriage according to claim 1, wherein said carriage has rotatable running wheels mounted on said guide rails, respectively.
3. The jumping bar landing burn maintenance device according to claim 1, wherein the traveling wheel is moved while running along the guide rail. 4. The carriage includes two parallel beams provided in a direction transverse to the axis of the guide rail, and has a rotatable traveling roller on which the slide table rests on each of the beams. And during the movement of the slide table,
4. The apparatus according to claim 1, wherein the traveling roller is moved while running along the beam. 5. The apparatus according to claim 1, wherein the drive mechanism includes a tension weight.