DE2241632A1 - DEVICE FOR EXACTLY FIXING THE JUMPING POINT OF ATHLETES DURING LONG AND TRIPLE JUMPS - Google Patents

Description

Device for the precise fixation of the jump point of athletes for long and triple jump With long and triple jump, the distance of the jump is from Take-off bar measured at. If an athlete crosses this take-off bar when jumping in the direction of the jump, the jump becomes invalid. Many athletes therefore prefer to be sure, before jumping in the direction of the jump in front of the take-off bar. As a result, however, they often "give away" many centimeters of jumping distance, since the The distance between the front edge of the board and the rear edge of the "landing" is measured as the jump distance will. The jump is therefore a very great physical strain for the athlete which very often significantly reduces his jumping performance. On the part of the jumpers there is therefore a need for a different, objective marking of theirs Jump.

The device according to the invention is used to achieve this object.

The device according to the invention for the precise fixation of the take-off point of athletes in long and three jump is characterized by a transverse to the jump axis movably arranged pressure-sensitive means (a) and parallel on both sides thereof to the jump axis arranged means (b) and (b ') whose inner limit a distance of at least 0.8 m from each other and which optionally have means (c), which are suitable for moving the means (a) from means (b) to means (b ').

Such a device is used as a jump-off point for long and triple jump instead of using the take-off bar at the end of the run-up lane generally has a smallest web width of 0.8 m, attached, the Means (b) and (b ') are arranged laterally X dr runway, such that their inner Boundaries in general at most up to the outer boundaries of the take-off path range, but preferably a distance of at least half a meter from them have outer boundaries of the take-off path.

As the pressure-sensitive agent (a), e.g. B. serve in a paper web, through which z. B. Drill the claws or spikes of the athlete's shoes when jumping. A conventional pressure-sensitive medium is advantageously suitable as pressure-sensitive means (a) Recording paper, which is preferably waterproof. Such recording papers can be used in the device according to the invention in any web width but the web width is preferably between 0.4 and 1.5 m usually 0.6 to 1 m. Pressure-sensitive recording papers of this kind become discolored when the athletes jump at the jump point through the over the sports shoes, z. B. claw shoes, exerted take-off pressure very clearly z. B. black or red, so that in each case a precise fixation of the athlete's take-off point is possible will. Pressure-sensitive recording papers are available in stores and are therefore needed not to be described here. You can in particular in the new device can be used in the form of commercially available roles.

The means (b) and (b ') can be obtained by e.g. B. rails if necessary be movably connected to each other in such a way that the distance between them facing each other Limitations can be changed. Such a connection of means (b) and However, (b ') is generally not required. Have means (b) and (b ') generally a common device for holding and moving paper webs. For example, as can be seen from the figure, the means (b) and (b ') each from a trestle made of wood or preferably of metal, e.g. B.

Aluminum or steel can be made, which are at their at the top end each a rotatably arranged roll for receiving a recording paper roll included and the pulleys attached to the shelves included, with im generally on one of the rollers carrying the recording paper rolls middle (c), for example a hand crank or an electric motor, is arranged through the recording paper continuously or preferably discontinuously from means (b) to means (b ') can be moved. Through the arranged on the support surface of the trestles (see illustration) Deflection pulleys are used in the embodiment shown in the figure Device allows, for example, recording paper resting firmly on the surface as a "take-off bar" to move transversely to the jump direction or jump axis.

The devices generally attached to means (b) and (b ') for pressing the pressure-sensitive agent (a) generally used as Rolls used recording paper webs, z. B. pressure rollers, as they are in the Sketch are shown, can be held in the usual way and with means (d) (in the figure not shown) be provided, through which the contact pressure of the paper web can be changed. Devices can also be attached to means (b) and / or (b ') (e) (not shown in the figure) must be fitted with an optional automatic Labeling or other identification.

z. Allow Bo on the edge of the paper web. That at the means (b) or (b ') attached means (c) is preferably designed so that it enables the Means (a) after or before a jump by about a half to a jump track width to move transversely to the take-off axis. Finally, in a particular embodiment of the device according to the invention, the means - (c) for moving the means (a) in such a way connected to a means (e) for identifying a specific point of the means (a) be the marking of the agent (a) along with its movement towards from means (b) to means (b ') takes place (e.g.

Printing the number of the athlete whose jump is taking place and where Jump then takes place in the area of this numbering),

Claims (1)

Device for the precise fixation of the jump point by athletes in long and three jump, characterized by a cross to the jump axis movably arranged pressure-sensitive means (a) and parallel on both sides thereof Means (b) and (b ') arranged to the jump axis, the inner boundaries of which form a A distance of at least 0.8 m from each other and, if necessary, means (c) which are suitable for converting the means (a) from means (b) to means (b ') to move. Sign.