FR2861312A1 - Ball throwing device for e.g. tennis, has conveyor belts sliding on rigid and smooth support in portion nearer to propulsion axis, to avoid deformation of belt when belt is in contact with ball and to regularly transfer force towards ball - Google Patents

Ball throwing device for e.g. tennis, has conveyor belts sliding on rigid and smooth support in portion nearer to propulsion axis, to avoid deformation of belt when belt is in contact with ball and to regularly transfer force towards ball Download PDF

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Publication number
FR2861312A1
FR2861312A1 FR0312497A FR0312497A FR2861312A1 FR 2861312 A1 FR2861312 A1 FR 2861312A1 FR 0312497 A FR0312497 A FR 0312497A FR 0312497 A FR0312497 A FR 0312497A FR 2861312 A1 FR2861312 A1 FR 2861312A1
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France
Prior art keywords
ball
propulsion
belt
balloon
contact
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FR0312497A
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French (fr)
Inventor
Gerardus Cornelis Ouwerling
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Individual
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Individual
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Priority to FR0312497A priority Critical patent/FR2861312A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
    • A63B69/406—Stationarily-arranged devices for projecting balls or other bodies with rotating discs, wheels or pulleys gripping and propelling the balls or bodies by friction
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
    • A63B2069/402—Stationarily-arranged devices for projecting balls or other bodies giving spin

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Toys (AREA)

Abstract

The device has two endless conveyor belts (2) rotating around two pulleys (3, 5) whose axles are perpendicular to a propulsion axis of a ball. Each belt slides on a rigid and smooth support (14) in a portion nearer to the propulsion axis, to avoid deformation of belt when the belt is in contact with the ball and to regularly transfer force towards the ball. An additional guide (13) is placed at a distance equal to radius of the ball.

Description

Le dispositif est une solution technique afin de propulser des ballons ouThe device is a technical solution to propel balloons or

des balles rond(e)s utilisé(e)s dans divers sports (football, tennis etc.) .  round balls used in various sports (football, tennis etc.).

Dans le passé des appareils destinés à projeter des ballons ou des balles ont déjà été conçus. Pour éjecter les balles ou les ballons, la plupart de ces appareils se servent de deux galets ou roues, entraîné(e)s en rotation en sens inverse, entre lesquels la balle ou le ballon est pris(e) en sandwich. Autre le fait que la précision de lancement ne donne pas entière satisfaction, avec ces appareils il est malheureusement impossible de donner toutes les vitesses souhaitées aux balles ou ballons. Le temps de contact avec la balle ou le ballon n'y est pas suffisant pour transmettre l'énergie nécessaire.  In the past, devices intended to project balloons or balls have already been designed. In order to eject balls or balloons, most of these devices use two rollers or wheels, rotated in the opposite direction, between which the ball or balloon is sandwiched. Other than the fact that the launch accuracy is not entirely satisfactory, with these devices it is unfortunately impossible to give all the desired speeds to the balls or balloons. The time of contact with the ball or the balloon is not enough to transmit the necessary energy.

Il existe aussi des appareils se servant de courroies parallèles tendues, chacune tournant autour des deux axes, lesquelles entraînent la balle ou le ballon. L'inconvénient réside dans le fait que la balle ou le ballon se compresse aux endroits où les courroies sont en contact avec les axes et déforment en revanche les courroies en leur milieu. Le résultat est que l'énergie n'est pas transmise de façon régulière; en résulte l'imprécision.  There are also devices using stretched parallel belts, each rotating around the two axes, which drive the ball or the ball. The disadvantage is that the ball or the ball compresses at the places where the belts are in contact with the axes and deform the belts in the middle. The result is that energy is not transmitted on a regular basis; resulting in inaccuracy.

Une des particularités du dispositif est la façon dont le ballon ou la balle est propulsée) : des bandes sans fin, entraînées par des rouleaux motorisés et coulissant sur des guides rigides dans les parties étant en contact avec la balle ou le ballon, imposent, dès l'introduction, son déplacement vers la sortie.  One of the peculiarities of the device is the manner in which the ball or the ball is propelled. Endless bands, driven by motorized rollers and sliding on rigid guides in the parts in contact with the ball or the ball, impose, as soon as the introduction, its moving to the exit.

Le coulissement des bandes sur des guides rigides exclut leur déformation lors du contact avec la balle ou le ballon. Le ballon ou la balle est prise en sandwich , il est plus ou moins comprimé entre les bandes, permettant un contact régulier et prolongé avec le ballon: la transmission de force et la précision du lancer s'en trouvent nettement améliorées par rapport aux systèmes existants.  The sliding of the strips on rigid guides excludes their deformation when in contact with the ball or the balloon. The ball or the ball is sandwiched, it is more or less compressed between the bands, allowing a regular and prolonged contact with the balloon: the transmission of force and the accuracy of the launch are significantly improved compared to existing systems .

La mise en place de guides rigides supplémentaires participant à imposer le trajectoire de la balle ou du ballon, présente un autre élément nouveau.  The introduction of additional rigid guides involved in imposing the trajectory of the ball or the ball, presents another new element.

Un autre aspect apprécié se trouve dans le fait que les ballons ou les balles peuvent recevoir une rotation voulue autour de leur propre axe, imitant ainsi un aspect de jeu très important: le brossage ou l'effet Magnus .  Another appreciated aspect is that the balls or balls can be rotated about their own axis, imitating a very important game aspect: the brushing or the Magnus effect.

La fixation de l'organe propulsant sur un dispositif comportant trois axes, permet de le diriger dans toutes les directions, ainsi le trajectoire du ballon ou de la balle peut être entièrement contrôlée.  The attachment of the propelling member on a device having three axes, can direct it in all directions, and the trajectory of the ball or the ball can be fully controlled.

II est certain que, pour l'apprentissage ou le perfectionnement des techniques physiques des sports concernés, un tel dispositif présente de grands avantages: le sportif peut se concentrer entièrement sur son geste à accomplir, puisque la façon dont les ballons ou les 2861312 -2- balles sont lancé(e)s peut être répétée, à intervalles voulus, avec une grande précision. Les dessins annexés illustrent un exemple de l'invention: La figure 1 représente une vue de côté du dispositif de l'invention.  It is certain that, for the learning or the improvement of the physical techniques of the sports concerned, such a device has great advantages: the sportsman can concentrate entirely on his action to be performed, since the way the balloons or the balls are 2861312 -2 - balls are thrown (e) s can be repeated, at intervals, with great precision. The accompanying drawings illustrate an example of the invention: FIG. 1 represents a side view of the device of the invention.

La figure 2 représente le même dispositif vu de face.  Figure 2 shows the same device seen from the front.

La figure 3 représente ce dispositif vu de dessus.  Figure 3 shows this device seen from above.

La figure 4 représente un schéma qui démontre l'orientation des éléments de propulsion. La figure 5 représente une variante de cette orientation avec trois éléments de propulsion. En référence à ces dessins, le dispositif comporte un châssis rigide ( no. 1) qui sert de support.  Figure 4 shows a diagram that shows the orientation of the propulsion elements. Figure 5 shows a variant of this orientation with three propulsion elements. With reference to these drawings, the device comprises a rigid frame (No. 1) which serves as a support.

La propulsion du ballon ou de la balle se fait par au moins deux bandes plates sans fin (no.2).  The propulsion of the ball or the ball is done by at least two endless flat bands (no.2).

Ces bandes sans fin entourent chacune une poulie motorisée ( no 5), dont le sens de rotation impose le déplacement du ballon vers la sortie et au moins une poulie menée ( no. 3) . Un seul moteur pourrait éventuellement animer l'ensemble des bandes si un dispositif de démultiplication propre à chaque bande était monté pour individualiser leurs vitesses.  These endless belts each surround a motorized pulley (No. 5), the direction of rotation of which requires the movement of the balloon towards the exit and at least one driven pulley (No. 3). A single engine could possibly animate all the bands if a gearing device specific to each band was mounted to individualize their speeds.

Chaque bande coulisse sur un support rigide et lisse (no.14) dans la partie la plus proche de l'axe de propulsion, évitant ainsi sa déformation lors du contact avec la balle ou le ballon et permettant le transfert de force régulière des bandes vers la balle ou le ballon.  Each strip slides on a rigid and smooth support (no.14) in the part closest to the axis of propulsion, thus avoiding its deformation during the contact with the ball or the balloon and allowing the regular force transfer of the bands towards the ball or the ball.

Des guides supplémentaires ( no. 13) placés à une distance égale au rayon de la balle ou du ballon par rapport à l'axe de propulsion et parallèles à celui-ci, aident à imposer la trajectoire voulue.  Additional guides (No. 13) placed at a distance equal to the radius of the ball or ball relative to the propulsion axis and parallel thereto, help to impose the desired trajectory.

Un tendeur, non illustré, pour chaque bande peut permettre l'ajustement des bandes aux poulies.  A tensioner, not shown, for each band can allow the bands to be adjusted to the pulleys.

L'axe de propulsion (no. 4) de la balle ou du ballon est déterminé par l'intersection des plans définis par le milieu de chaque bande (fig. 4, fig. 5) . Ces plans sont donc perpendiculaires aux axes ( no. 6, no. 16) des poulies ( no. 5, no. 3).  The axis of propulsion (No. 4) of the ball or balloon is determined by the intersection of the planes defined by the middle of each band (Fig. 4, Fig. 5). These planes are therefore perpendicular to the pulley axes (No. 6, No. 16) (No. 5, No. 3).

Dans le cas où il n'y a que deux bandes, ces plans coïncident et l'axe de propulsion se trouve à distance égale des bandes (fig. 4).  In the case where there are only two bands, these planes coincide and the axis of propulsion is at equal distance from the bands (Fig. 4).

Dans la partie centrale, qui a donc un contact avec le ballon ou la balle, la distance entre les bandes et l'axe de propulsion est égale ou légèrement inférieure au rayon du ballon ou de la balle (fig. 2; fig. 3). Cette distance peut être plus grande à l'entrée qu'à la sortie, permettant une meilleure amorce.  In the central part, which therefore has contact with the ball or the ball, the distance between the bands and the axis of propulsion is equal to or slightly less than the radius of the ball or the ball (FIG 2, FIG 3). . This distance can be greater at the entrance than at the exit, allowing a better start.

Le ballon ou la balle, ayant une certaine flexibilité, se pince alors après son introduction et est entraîné(e) par les bandes vers la sortie.  The balloon or ball, having a certain flexibility, then pinches itself after its introduction and is driven by the strips towards the exit.

La vitesse de sortie de la balle ou du ballon, ainsi que son effet de rotation dépendent de la 2861312 -3- vitesse linéaire donnée aux bandes. La variation de vitesse de chaque bande indépendamment peut être obtenue par des dispositifs électroniques couplés aux moteurs, ou par des variateurs de vitesse classiques. Une différence de vitesse entre les bandes permet la rotation de la balle ou du ballon autour de son propre axe et est à l'ori8ine de l'effet MAGNUS .  The exit velocity of the ball or balloon, as well as its rotation effect, depend on the linear speed given to the bands. The speed variation of each band independently can be achieved by electronic devices coupled to the motors, or by conventional variable speed drives. A difference in velocity between the bands allows the ball or balloon to rotate about its own axis and is at the origin of the MAGNUS effect.

L' or8ane propulseur est fixé sur trois pivots perpendiculaires (no. 7, no. 8, no. 9), chacun avec sa propre commande ( no. 10, no. 11, no. 12), lesquelles permettent d'obtenir la direction voulue du ballon ou de la balle. Un dispositif électronique a8issant sur les commandes précitées peut permettre de programmer la position de l'or8ane propulseur.  The propulsion gun is fixed on three perpendicular pivots (No. 7, No. 8, No. 9), each with its own control (No. 10, No. 11, No. 12), which makes it possible to obtain the direction wanted the ball or the ball. An electronic device ont8issant on the aforementioned commands can be used to program the position of the or8ane propulseur.

Dans une variation non-illustré du dispositif, les trois pivots sont remplacés par une rotule. La direction de la rampe de propulsion peut ainsi être obtenue par seulement deux commandes judicieusement placées.  In a non-illustrated variation of the device, the three pivots are replaced by a ball joint. The direction of the propulsion ramp can thus be obtained by only two commands judiciously placed.

Puisque la vitesse de chaque bande peut également être prédéterminée, l'ensemble de la trajectoire du ballon peut être programmé . Le dispositif est monté par l'intermédiaire d'un des pivots, ou par une rotule, sur n'importe quel support: socle, voiture de golf, essieux, etc. (15).  Since the speed of each band can also be predetermined, the entire trajectory of the balloon can be programmed. The device is mounted via one of the pivots, or by a ball joint, on any support: base, golf car, axles, etc. (15).

Le dispositif selon l'invention est particulièrement destiné au lancement des balles ou des ballons pendant des séances d'entraînement sportifs.  The device according to the invention is particularly intended for launching balls or balls during sports training sessions.

L'invention n'est nullement limitée au mode de réalisation décrit et représenté qui n'a été donne qu'à titre d'exemple. En particulier, elle comprend tous les moyens constituant des équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci sont exécutées selon l'esprit de l'invention.  The invention is not limited to the embodiment described and shown which has been given by way of example. In particular, it comprises all the means constituting technical equivalents of the means described and their combinations if they are executed according to the spirit of the invention.

Claims (8)

REVENDICATIONS.CLAIMS. 1-- Dispositif selon l'invention pour lancer des ballons ou des balles utilisé(e)s dans de nombreux sports, caractérisé en ce qu'il comporte au moins deux bandes plates sans fin (no.2.) : coulissants dans leurs parties en contact avec la balle ou le ballon sur un support lisse et rigide (no.14) , - chacune tournant autour d'au moins deux poulies parallèles ( no. 3, no. 5) dont une motorisée dont les axes (no. 6,110.16) sont perpendiculaires à l'axe de propulsion ( no. 4) de la balle ou du ballon, d'une distance inférieure au rayon de la balle ou du ballon vers l'axe de propulsion précité dans leurs parties centrales.  1-- Device according to the invention for throwing balls or balls used in many sports, characterized in that it comprises at least two endless flat belts (no.2.): Sliding in their parts in contact with the ball or the ball on a smooth and rigid support (no.14), - each rotating around at least two parallel pulleys (No.3, No.5), including a motorized motor whose axes (heading No 6.11.16) ) are perpendicular to the propulsion axis (No. 4) of the ball or balloon, from a distance less than the radius of the ball or balloon to the propulsion axis mentioned above in their central parts. 2- Dispositif selon la revendication 1, caractérisé en ce que les bandes (no. 2) ont dans leur partie ayant contact avec la balle ou le ballon une distance équivalente vers le centre du ballon ou de la balle ( l'axe de propulsion, no. 4) , cette distance n'est pas nécessairement identique à l'entrée et à la sortie du ballon ou de la balle.  2- Device according to claim 1, characterized in that the bands (No. 2) have in their part that have contact with the ball or the balloon an equivalent distance towards the center of the balloon or the ball (the axis of propulsion, No. 4), this distance is not necessarily the same as the entry and exit of the ball or ball. 3- Dispositif selon une ou l'ensemble des revendications précédentes, caractérisé en ce que des guides (no.14) placés à une distance égale au rayon de la balle ou du ballon de l'axe de propulsion (no. 4) participent à imprimer une trajectoire strictement rectiligne à la balle ou du ballon le temps du contact avec les bandes propulsantes (no 2).  3- Device according to one or all of the preceding claims, characterized in that guides (no.14) placed at a distance equal to the radius of the ball or the balloon of the propulsion shaft (No. to print a strictly rectilinear trajectory to the ball or the balloon the time of the contact with the propelling bands (no 2). 4- Dispositif selon une ou l'ensemble des revendications précédentes, caractérisé en ce que la vitesse de rotation de chaque bande peut être%réglée séparément.  4- Device according to one or all of the preceding claims, characterized in that the speed of rotation of each band can be% separately set. 5- Dispositif selon une ou l'ensemble des revendications précédentes, caractérisé en ce que l'ensemble de l'organe propulseur est fixé sur une rotule, permettant le changement de l'organe propulseur et donc de la trajectoire de la balle ou du ballon dans tous les sens par rapport au socle (15).  5- Device according to one or all of the preceding claims, characterized in that the entire propulsion unit is fixed on a ball joint, allowing the change of the propulsion unit and therefore the trajectory of the ball or ball in all directions with respect to the base (15). 6- Dispositif selon une ou l'ensemble des revendications précédentes, caractérisé en ce que l'ensemble de l'organe propulseur est monté sur trois pivots ( no. 7, no. 8, no. 9) , permettant le changement de l'organe propulseur et donc de la trajectoire de la balle ou du ballon dans tous les sens par rapport au socle (15).  6. Device according to one or all of the preceding claims, characterized in that the assembly of the propulsion unit is mounted on three pivots (No. 7, No. 8, No. 9), allowing the change of the propellant and therefore the trajectory of the ball or the ball in all directions relative to the base (15). 7- Dispositif selon la revendication précédente, caractérisé en ce que chaque pivot (no. 7, no. 8, no. 9), a sa propre commande (no. 10, no. 11, no. 12).  7. Device according to the preceding claim, characterized in that each pivot (No. 7, No. 8, No. 9) has its own control (No. 10, No. 11, No. 12). 8- Dispositif selon la revendication 7, caractérisé en ce que l'axe d'un des pivots ( no. 8) coïncide avec l'axe de propulsion ( no. 4). 25  8- Device according to claim 7, characterized in that the axis of one of the pivots (No. 8) coincides with the axis of propulsion (No. 4). 25
FR0312497A 2003-10-24 2003-10-24 Ball throwing device for e.g. tennis, has conveyor belts sliding on rigid and smooth support in portion nearer to propulsion axis, to avoid deformation of belt when belt is in contact with ball and to regularly transfer force towards ball Withdrawn FR2861312A1 (en)

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FR0312497A FR2861312A1 (en) 2003-10-24 2003-10-24 Ball throwing device for e.g. tennis, has conveyor belts sliding on rigid and smooth support in portion nearer to propulsion axis, to avoid deformation of belt when belt is in contact with ball and to regularly transfer force towards ball

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FR0312497A FR2861312A1 (en) 2003-10-24 2003-10-24 Ball throwing device for e.g. tennis, has conveyor belts sliding on rigid and smooth support in portion nearer to propulsion axis, to avoid deformation of belt when belt is in contact with ball and to regularly transfer force towards ball

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1882500A1 (en) * 2006-07-28 2008-01-30 Kurt Scheiwiller Device for expelling balls
WO2009132471A1 (en) * 2008-05-02 2009-11-05 ETH Zürich Ball machine for generating reproducible shots with spin in any direction

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT196758B (en) * 1957-03-01 1958-03-25 Josef Vukovits Toy gun
US3308802A (en) * 1964-04-20 1967-03-14 Applegate Earl Power driven baseball pitching machine with batter signalling means
FR2313094A1 (en) * 1975-06-06 1976-12-31 Ffelnyco Ball game training equipment - has second set of contra-rotating projection rollers running faster than first
DE2803929A1 (en) * 1978-01-30 1979-08-02 Hans Knoop Football training device - accelerates separate balls to kick off speed using three-belt drive system
DE3804209A1 (en) * 1988-02-11 1989-08-24 Norbert Dipl Ing Burkardt Apparatus for the translatory and rotational acceleration of bodies with a spherically designed surface to predetermined speed states
DE19528816C1 (en) * 1995-08-05 1996-12-05 Dieter Fedder Cooled conveyor belt on support surface of holder
JP2000107339A (en) * 1998-10-05 2000-04-18 Murakami Tekko Kk Ball shooting-out device
US20030195061A1 (en) * 2000-03-14 2003-10-16 Brown Harvey B. Pitching machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT196758B (en) * 1957-03-01 1958-03-25 Josef Vukovits Toy gun
US3308802A (en) * 1964-04-20 1967-03-14 Applegate Earl Power driven baseball pitching machine with batter signalling means
FR2313094A1 (en) * 1975-06-06 1976-12-31 Ffelnyco Ball game training equipment - has second set of contra-rotating projection rollers running faster than first
DE2803929A1 (en) * 1978-01-30 1979-08-02 Hans Knoop Football training device - accelerates separate balls to kick off speed using three-belt drive system
DE3804209A1 (en) * 1988-02-11 1989-08-24 Norbert Dipl Ing Burkardt Apparatus for the translatory and rotational acceleration of bodies with a spherically designed surface to predetermined speed states
DE19528816C1 (en) * 1995-08-05 1996-12-05 Dieter Fedder Cooled conveyor belt on support surface of holder
JP2000107339A (en) * 1998-10-05 2000-04-18 Murakami Tekko Kk Ball shooting-out device
US20030195061A1 (en) * 2000-03-14 2003-10-16 Brown Harvey B. Pitching machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07 29 September 2000 (2000-09-29) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1882500A1 (en) * 2006-07-28 2008-01-30 Kurt Scheiwiller Device for expelling balls
WO2009132471A1 (en) * 2008-05-02 2009-11-05 ETH Zürich Ball machine for generating reproducible shots with spin in any direction

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