DE2410126A1 - Rotary disc for ski training - is large dia disc with slidable upper surface inclined to horizontal - Google Patents

Abstract

A large disc with a flat, smooth or slightly curved upper surface any diameter, e.g. 8 metres, is tilted at a desired angle, e.g. 20 deg. and is rotated on its own centre. The surface must be smooth or covered with a material of good sliding quality. The impression of a slope is given by skiing down on the upward moving section of the disc. Speed is controlled by this r.p.m. and training either near centre or periphery of the disc. The disc may run on a centre bearing, and rollers or other suitable arrangement on the periphery. Safety devices like soft surroundings, soft barriers and entry or exit platforms should be included.

Description

latent - description training device for skiers, called "Skirotor A) General.

Although alpine skiing has become a popular sport, there are So far there is no special training device of the same nature as this sport on which the. typical movement sequences and the characteristic requirements such as correct posture, weight shifting, ski guidance and the like and can be controlled.

1) ies also applies to all other sports, for dle 'das Sliding or rolling off inclined surfaces (slopes) is a prerequisite.

Well-known home training devices lack the essential nature of the operation and are only aimed at muscle training of the user.

Ski lifts cannot be used as sports or exercise equipment in this sense They are only a means of transport and do not allow one Exercise directly.

Are for exercising or training the above sports So there is always a need for slopes that are not always available always only the one-time, more or less brief "running down" (sliding) of the Slopes possible; it can only be repeated after climbing again, using the lift or something similar will.

The new type of device described below, hereinafter referred to as "Skirotor" for short called, enables a completely similar training for skiers as well for all those sports which, of their kind, make the athlete slide down a sloping surface with various aids (skis, toboggan, bobsleigh, skibob, Dry skis and the like).

It can be especially useful if it is executed in the appropriate size is to go beyond the features of a training device and use it as an independent one Allow sports equipment. "Skirotor" B) Description and mode of operation of the ski rotor: It was found that the surface of a flat, circular, disk rotating around its center, which is brought into a corresponding inclined position is on the side that moves upwards (uphill), used for indefinite sliding of people or objects can be, the latter being their absolute location in relation to the environment maintained.

This sliding corresponds completely to that which, for example, a Skier descends from a slope.

Furthermore, it was found that not only a uniform sliding, but also Changes in the direction of movement and the sliding speed are possible, such as they are carried out, for example, during a ski gate run.

The user of the "ski rotor", ie the athlete, usually changes its absolute location not or only slightly.

Rather, the movement is carried out by the device.

Because this movement takes place steadily (rotation of the disk) there is no time limit on sliding.

It is necessary that the athlete uses his mean gliding speed that of the "ski rotor" adapts, but changes in location (changes in distance from the center of the disc) enable corresponding changes in the sliding speed and require.

"Skirotor" C) Structure and construction: The "Skirotor" consists of following essential parts: 1) One rotating around its own center, above Flat disc (item 1 of the patent drawing) in a triangular or polygonal shape, also possible with a central recess, which results in a circular ring shape.

The disc is installed at a slight incline in relation to the horizontal seams where the incline corresponds to that of a slope required for skiing and the like.

The disc surface can also be curved slightly inwards or outwards or be conical.

The disc can be made from a wide variety of materials, for example Is, metal, wood, plastic, manufactured and should be stable and dimensionally stable be. The size should be at least 5 m, but if possible 8 m or more in diameter be.

An upper size limit is only due to the technical Possibilities are given. Static and dynamic balancing is appropriate.

A natural or artificial one located on the disc surface Snow covering (item 2) or another covering with good sliding properties, wi, e natural or artificial ice, plastic, forms the sliding surface for the user or users.

The usability with dry skis, roller skates and the like is with solid to slightly elastic wood or plastic covering without the requirement given good sliding properties.

2) Storage and guidance of the pane: There is a central warehouse for full panes (Item 3), attached in the middle, designed as a ball, roller or plain bearing, appropriate.

Additional roller or slide bearings (item 4) at different points outside the center of the pane are advantageous for stabilization, guidance and support (Support) of the disc and allow a lighter disc design.

, Skirbtor11 These roller or plain bearings can be the central warehouse with the appropriate arrangement (support and guide rollers all around) also replace what is necessary for circular rings.

If rollers are used, they can be attached to the floor, whereby the disc rolls over them, or they may be attached to the disc and rotate with it, rolling on a running surface on the ground.

Support rollers become vertical, guide rollers parallel to the pane Correspondingly, plain bearings or sliding shoes can be used.

Raising the support and guide bearings can reduce the inclination of the sliding surface to be changed.

3) Drive unit: Electric motors (pos.

), Internal combustion engines and the like, manual drives for small disks (Crank handle) can be used.

The power is transmitted by rope, belt or chain drives (Item 6), gears and the like.

Changes in the speed of the ski rotor are achieved through the use of gear motors and belt drives or other gears of all kinds with variable transmission ratio possible.

It is advisable to install a starting clutch in the power transmission.

4) Entry and exit for users: ski rotors with full disc surface are to be entered from the outside. For this purpose, there is an advantage on the slope side, on the valley side the center of the pane, fixed step surface (pos. 7).

Ski rotors with circular disks can be entered from the inside be, i.e. at the point of a lower rotational speed. Shall enter and leaving take place while the target is running, this means the inside entry one "Skirotor" relief for the user Above or below ground access to the center of the target is required.

5) Protective measures: To avoid accidents during use of the ski rotor are possible and recommended: One with the disc surface (sliding surface) approximately closing fixed slope area that encloses this as tightly as possible with a soft sliding surface, e.g. snow. If people (e.g. in the event of a fall) should be thrown away by centrifugal force, they can be here come to a standstill without risk of injury.

Alternatively, on the outer edge of the pane, a vertical or inclined, padded or covered with straw mat covering, rotating protective wall be attached.

A braking device of the usual type for emergencies.

6) Possible additional equipment on the sliding surface: gate poles for Imitation of a gate run, ski jumps for ski jumpers, slide channels or slide tracks for bobsleigh, toboggan or sleigh rides and the like.

By using refrigerants, as with artificial ice rinks usual, the snow or ice covering required on the disc surface is produced and kept cool, making the ski rotor usable for winter sports becomes possible even in seasons without natural cold.

D) Use of the ski rotor: From the described structure of the ski rotor there is a direction of movement of the partial disc surfaces on both sides of their Center uphill and downhill. That part of the surface that performs an uphill (up) movement.

"Skirotor" The user (skier or similar) turns around, arrived there, down into the valley and lets itself be by means of its own weight and the ability to slide its Slide off sports equipment. Due to the upward movement of the sliding surface (disc surface) he can keep his absolute speed at about zero on average, that is, he does not change its position vis-à-vis der'Umgcbug or does not change it significantly.

As a result of the resulting relative speed to the disc surface but at the same time that situation is brought about, that of sliding down from one Terrain slope corresponds.

From this it follows: 1) The state of sliding down in the manner of the Skiing or similar sports are completely imitated.

2) The duration of the slide is arbitrary and unlimited, since the Rotation of the disc is unlimited and the sliding surface is steady renewed.

The prerequisite for this is that the athlete has his mean sliding speed adapts to the speed of rotation of the disk.

3) Since the absolute speed of the disk surface parts with the athlete has the Possibility, by choosing its location (center distance), that sliding speed to choose the one that corresponds to his desire and ability.

If he moves closer to the center of the pane, only a slight one is required Sliding. The greatest sliding speed is possible at the disk periphery.

4) Special importance arises from the possibility of change the direction of movement, i.e. to carry out a slalom drive.

5) Enables the inclination of the pane to be increased from the horizontal faster sliding by increasing the rotation speed (disc speed) compensation is possible.

6) The application of markings, slalom gates, slide tracks, ski jumps and the like allows individual use of the device by the athlete.

"Skirotor" 7) The speed of rotation of the disc is to be selected so that the highest possible sliding speeds can be achieved, but neither the sliding surface (e.g. snow) or any persons or objects rotating with it as a result of excessively high Centrifugal force can be thrown away.

E) Technical data: Embodiment 1: Disc size of the ski rotor D = 8m; Full disk.

Disc inclination about 20 against the horizontal can be changed.

Drive unit: electric gear motor 3 KW, output speed n2 = 60 rpm Starting slip clutch.

Power transmission: Driving pulley D = 400 mm, driven pulley (on the ski rotor) D = 2000 mm. Perlon rope 10 mm thick.

Speed of rotation at the disk periphery at a disk speed n = 12 rpm v = ##### = 8.n.12 = about 5, o m / s, that's about 18, KMh 60 60 With this middle one An athlete on the periphery of his disc can achieve speed on the Slice surface slide if it simultaneously maintains its absolute position target.

In the event of his fall (relative standstill to the. Disc) he is carried in a circle and receives an outwardly directed centrifugal force so a little more than half of his body weight.

Explanation: G = dead weight, assumed 60 kg, g = gravitational acceleration = 9.81 m / s² # .n w = angular velocity = # = 1.26 1 / s, 30 r0 = distance to the center of the pane = about 4 m.

"Ski rotor" design game 2: Ski rotor size D = 20 m, circular ring disc with central area recess of d = 6 m.

Rotational speed at the disk periphery at n = 7 rpm: v = 7.3 m / s, that is about 26.4 KMh In the case of co-rotating: centrifugal force on the disk periphery C = ############ = 32.8 kp (with an approximate body weight of 60 kg) when getting in and out the inside diameter of the disk results in: Existing rotational speed d. #. n 3.0. #. 7 V = = 1.1 m / s, that is about 4KMh 60 60 centrifugal force in the case of nitriding at 60 kg body weight: C = ########### = 12.8 kp From the two calculation examples is It can be seen that with ski rotors of larger diameter, higher turning and sliding speeds are possible without the user in the case of rotating with the disc in Areas too high centrifugal forces. This results from the fact that the peripheral speed of the disk at constant speed increases proportionally with the disk size that Centrifugal force, however, at constant peripheral speed proportionally with a pulley enlargement decreases.

If the disc surface is curved inwards too hollow, the disc takes the form of a plate, so the risk of being thrown away is reduced to the outside by the centrifugal force, as the dead weight of the Pliehkraft to a certain extent Measures counteracts.

Claims (1)

Skiro -tor ' Protection claims: Disc-shaped, circular body with flat Upper side, rotating around its own center, made to rotate by motor or Mukselkraft, supported on a solid base by support and guide bearings, inclined to the horizontal in such a way that the upper, flat disc surface a slope-like inclined surface (inclined plane) forms, the upper disk surface continues provided with a snow covering that allows people or objects to mediate their own weight on it, with the special effect that no inevitable The absolute location of these persons or objects is changed if sliding on the uphill part of the disc surface against the direction of movement the turntable takes place, consequently the duration of the sliding is unlimited, provided and used as a training or sports device for practicing sports that are based on the principle of sliding down inclined slopes or slideways. "Skirotors' 2.) The device described, but the disc 111 in the shape of a circular ring or in the form of a polygon with or without a central area recess. 3.) One of the devices described, but the upper pane surface conical or arched inwards or outwards. 4.) One of the devices described, but on the upper surface of the pane with an ice surface or an artificial sliding surface, consisting of artificial snow, Eunsteis or hunsts-toff with good sliding properties, equipped. 5.) One of the devices described, but on the upper surface of the pane provided with a firm or elastic covering that prevents people from sliding off permitted by means of roller skates or roller skis. 6.) One of the devices described, but equipped with a device to change the disc speed, to enable variable sliding or unwinding speeds. 7;) One of the devices described, but equipped with a device to change the inclination of the upper disc surface (sliding surface) against the horizontal. "Skirotor" 8.) One of the devices described, but its sliding surface equipped with additional equipment, e.g. gate poles, markings, Jumps, slides and the like. 9 ..) One of the devices described, but with additional facilities to facilitate and improve the operating mode, such as centrifugal coupling, smoothing device for the sliding surface, steps, running boards and the like. 10.) One of the devices described, but with additional facilities to improve accident protection, such as braking devices, protective walls, protective surfaces, Collecting areas and the like. 11.) One of the devices described, but in a version with more than 8 m and with an unlimited top diameter, which means that it can be used is possible by several people at the same time in the variations described. 12.) One of the devices described above, but intended and used as a test device for sports equipment or parts of sports equipment, their characteristics is the sliding or rolling of inclined slopes or slideways. Blank page