EP0037806B1 - Device for projecting balls with a great shooting accuracy - Google Patents

Device for projecting balls with a great shooting accuracy Download PDF

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Publication number
EP0037806B1
EP0037806B1 EP81870018A EP81870018A EP0037806B1 EP 0037806 B1 EP0037806 B1 EP 0037806B1 EP 81870018 A EP81870018 A EP 81870018A EP 81870018 A EP81870018 A EP 81870018A EP 0037806 B1 EP0037806 B1 EP 0037806B1
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EP
European Patent Office
Prior art keywords
ball
striker
shaft
deviation
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81870018A
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German (de)
French (fr)
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EP0037806A2 (en
EP0037806A3 (en
Inventor
Georges Defosse
Joseph Hensenne
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Umicore NV SA
Original Assignee
Ateliers de Constructions Electriques de Charleroi SA
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Filing date
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Priority to AT81870018T priority Critical patent/ATE11872T1/en
Publication of EP0037806A2 publication Critical patent/EP0037806A2/en
Publication of EP0037806A3 publication Critical patent/EP0037806A3/en
Application granted granted Critical
Publication of EP0037806B1 publication Critical patent/EP0037806B1/en
Expired legal-status Critical Current

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    • 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

Definitions

  • European patent 80 200 346.7 EP-A-19311 published after the filing date of the present application describes, through a few exemplary embodiments, a device in which the percussion lever is of low mass and which is arranged to recover, before impact with the ball, the kinetic energy accumulated by the other elements of motion transmission.
  • a player modifies the point of percussion on the ball in such a way that the latter is animated by a rotational movement around an axis which depends on the position of the point of percussion. relative to the center of gravity of the ball.
  • European patent 79 200 221.4 EP-A-0018 444 published after the filing date of the present application describes a device which gives a left trajectory to the balloon by imposing on it, in the sending position, a speed rotation predetermined around a predetermined axis.
  • the percussive mass of the balloon launcher does not strike the balloon low enough to obtain the desired type of trajectory.
  • the trajectory given to the ball by the impact of the percussive mass must be modified by an adequate device.
  • the usual way is to arrange an inclined plane according to a slope chosen at a determined level.
  • the contact between the balloon and the inclined plane communicates to the balloon a rotation about a horizontal axis perpendicular to the greatest slope of the inclined plane.
  • This rotation modifies the trajectory of the ball by shortening its point of fall and gives a false rebound.
  • the ball is felt more harshly.
  • the modification of the coefficient of friction between the ball and the inclined plane depending on whether both are dry, wet, covered with mud ... the trajectory is very little repetitive during successive shots.
  • Patents US-A-3277878 and US-A-2646785 describe ball launching devices which, using elastic tensioners, gradually communicate the speed to the ball and whose gusset, driving the ball on the launching pad , is provided with prominences to prevent the ball from zigzagging on the launching pad and to limit the adhesion between the ball and the gusset during the ejection of the ball.
  • Patent AT-B-220528 describes a percussion device composed, at least, of two percussion elements hitting the ball one after the other. The first percussion element hits the ball to release it from its support, the second percussion element hits the ball to communicate its final speed.
  • the percussion device mounted at the end of the percussion lever, carries several percussion points arranged symmetrically with respect to the plane in which the percussion lever moves and simultaneously striking the ball.
  • the symmetrical arrangement of the percussion points of the percussive end with respect to the plane perpendicular to the axis of suspension of the lever passing through the departure trajectory of the ball compensates for the irregularities of the surface of the ball and greatly reduces the deformation of the outer envelope thereof.
  • this device called a percussion device improves the precision of the trajectory of the ball.
  • another device modifies the trajectory of the ball. It is arranged symmetrically with respect to the vertical plane passing through the firing axis.
  • FIG. 1 shows an exemplary embodiment of a percussion device comprising several percussion elements.
  • a percussion lever 2 is terminated by a fork made up of two teeth 3 each equipped, at the free end, with an axis 4 intended to receive two rollers 5 free to rotate around this axis 4.
  • L'orienta tion of each axis 4 is approximately parallel to the axis of rotation along which the ball turns when we want to communicate a left trajectory.
  • Each axis 4 is therefore parallel to the axis of rotation 6 of a presentation device 7 for the balloon 8.
  • the balloon 8 shown in phantom is placed on a small diameter cup 9 connected to a suction system (not shown) which maintains the balloon 8 on the cup regardless of the speed of rotation of the presentation device 7.
  • the orientation of the teeth 3 of the fork can be adjustable by an appropriate device for modifying the percussion points of the rollers 5 on the ball 8.
  • the percussion device 1 strikes, by means of the four rollers 5, the balloon 8 simultaneously at four points, the deformation of the outer envelope of the balloon 8 is small and practically does not interfere with the rotation given beforehand to the balloon 8 according to the axis 6.
  • the striking of the ball distributed in several points, requires less of its envelope and thus contributes to reducing wear.
  • FIG. 2 represents an exemplary embodiment of the device for deflecting or modifying the trajectory of the balloons.
  • a stirrup 10 made integral with the chassis 11 by fixing means comprises two branches 12 arranged symmetrically with respect to the plane defined by the arrival and departure paths of the ball.
  • This bracket 10 serves as a support for a mobile assembly 13 which can oscillate around a horizontal axis 14, placed perpendicular to the vertical plane passing through the firing axis to occupy either a high position or a low position as shown in the figure 2.
  • This movable assembly 13 comprises two forks 15 each threaded on a branch 12 of the stirrup 10 and joined together by a flat 16.
  • Each fork 15 carries an axis 17, parallel to the axis 14, around which a roller 18 freely pivots
  • These rollers or deflection elements 18 occupy a symmetrical position with respect to the plane perpendicular to the axis 14 passing through the firing axis.
  • the rollers 18 are of small diameter and of low inertia. The same is true for the rollers (5).
  • the position of the rollers 5 and 18 is symmetrical both to the plane of movement of the percussion arm 2 and to the shooting axis of the ball.
  • the symmetry with respect to the plane of movement of the percussion arm 2 ensures, on the one hand, good centering of the balloon 8 when the rollers 5 release it from the positioning cup 9 and project it forward.
  • the symmetry with respect to the firing axis allows, on the other hand, the rollers 18 to maintain the correct guiding of the balloon 8 when it crashes on these rollers and then reshapes resiliently to resume a more ascending trajectory.
  • the rollers are cylindrical in shape with strongly rounded edges so as not to damage the balloons.
  • shape, the diameter or the number of rollers can vary as long as the principle of a symmetrical arrangement with respect to the plane of movement of the percussion arm is respected.
  • the rollers 5 and 18 can be of frustoconical or hyperbolic shape.
  • the invention is in no way limited to the exemplary embodiments described by way of example.
  • it comprises percussion elements which are not mounted on the end of a percussion lever, but for example on the end of a piston.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Toys (AREA)
  • Pinball Game Machines (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

1. Device projecting balls by elastic impact, provided with a striker means (1) mounted on the end of a striker lever (2) or the like in order, at the end of the travel of the striker lever (2) or the like, to strike a ball (8) placed on a presentation element (7) and to project said ball along a firing axis, characterised in that the said striker means (1) is arranged to comprise a plurality of striker elements (5) which come into contact with the ball (8) simultaneously and are situated symmetrically with respect to the plane in which the striker lever (2) is displaced, and in that the said projecting device comprises a means (10, 13, 14) for causing deviation of the ball (8), said means being arranged to present or withdraw deviation-causing elements (18) which come into contact with the ball (8) simultaneously and which are arranged symmetrically with respect to the vertical plane extending down the axis of firing.

Description

Pour transmettre, par choc élastique, un maximum d'énergie cinétique à un corps au repos, il est avantageux que la masse percutante soit de même grandeur que la masse percutée. Dans le cas d'une propulsion de ballon par choc élastique il faut donc, pour lui communiquer un maximum d'énergie, disposer d'un levier de percussion de très faible masse. L'expression « par choc élastique » englobe la notion d'un objet percutant sur un objet percuté, ce dernier étant élastique.To transmit, by elastic shock, a maximum of kinetic energy to a body at rest, it is advantageous that the impacting mass is of the same magnitude as the impacted mass. In the case of a balloon propulsion by elastic shock it is therefore necessary, to communicate a maximum of energy to it, to have a percussion lever of very low mass. The expression "by elastic shock" encompasses the notion of a striking object on a struck object, the latter being elastic.

Le brevet européen 80 200 346.7 EP-A-19311, publié après la date de dépôt de la présente demande décrit, à travers quelques exemples de réalisation, un dispositif dans lequel le levier de percussion est de faible masse et qui est agencé pour récupérer, avant l'impact avec le ballon, l'énergie cinétique accumulée par les autres éléments de transmission de mouvement.European patent 80 200 346.7 EP-A-19311, published after the filing date of the present application describes, through a few exemplary embodiments, a device in which the percussion lever is of low mass and which is arranged to recover, before impact with the ball, the kinetic energy accumulated by the other elements of motion transmission.

Pour donner au ballon, une trajectoire gauche, hors plan, un joueur modifie le point de percussion sur le ballon de telle manière que ce dernier soit animé d'un mouvement de rotation autour d'un axe qui dépend de la position du point de percussion par rapport au centre de gravité du ballon.To give the ball a left trajectory, out of plane, a player modifies the point of percussion on the ball in such a way that the latter is animated by a rotational movement around an axis which depends on the position of the point of percussion. relative to the center of gravity of the ball.

Le brevet européen 79 200 221.4 EP-A-0018 444, publié après la date de dépôt de la présente demande décrit un dispositif qui donne une trajectoire gauche au ballon en imposant à celui-ci, en position d'envoi, une rotation de vitesse prédéterminée autour d'un axe prédéterminé.European patent 79 200 221.4 EP-A-0018 444, published after the filing date of the present application describes a device which gives a left trajectory to the balloon by imposing on it, in the sending position, a speed rotation predetermined around a predetermined axis.

Lorsque, dans un lanceur de ballon par choc élastique, le ballon est percuté en seul point, il y a déformation du ballon tout autour du point d'impact. Sous le choc l'enveloppe du ballon a tendance à «enrober» la masse percutante. Cette déformation varie fortement selon la souplesse de l'enveloppe du ballon et sa pression de gonflage. Ces écarts de déformation, éventuellement associés à des irrégularités de surface, telle que la présence de la soupape à un seul point d'impact, contrarient la trajectoire du ballon.When, in a balloon thrower by elastic shock, the balloon is struck in only point, there is deformation of the balloon all around the point of impact. Under shock, the envelope of the balloon tends to "coat" the percussive mass. This deformation varies greatly depending on the flexibility of the balloon envelope and its inflation pressure. These deformation deviations, possibly associated with surface irregularities, such as the presence of the valve at a single point of impact, thwart the trajectory of the ball.

Enfin pour donner au ballon une trajectoire fortement ascendante, le joueur frappe le ballon à sa base.Finally to give the ball a strongly upward trajectory, the player hits the ball at its base.

Compte tenu de l'encombrement de la coupelle de positionnement qui, par aspiration, maintient fermement le ballon avant le coup d'envoi et/ou de l'encombrement du dispositif d'entraînement, donnant éventuellement à cette coupelle de positionnement un mouvement de rotation à une vitesse déterminée il se peut que malgré un réglage en hauteur de la coupelle de positionnement la masse percutante du lance-ballons ne frappe pas le ballon suffisamment bas pour obtenir le type désiré de trajectoire. Dans ce cas, il faut que la trajectoire donnée au ballon par l'impact de la masse percutante soit modifiée par un dispositif adéquat.Given the size of the positioning cup which, by suction, firmly holds the ball before kick-off and / or the size of the drive device, possibly giving this positioning cup a rotational movement at a determined speed it may be that despite an adjustment in height of the positioning cup the percussive mass of the balloon launcher does not strike the balloon low enough to obtain the desired type of trajectory. In this case, the trajectory given to the ball by the impact of the percussive mass must be modified by an adequate device.

La façon habituellement utilisée est de disposer un plan incliné selon une pente choisie à un niveau déterminé.The usual way is to arrange an inclined plane according to a slope chosen at a determined level.

Toutefois, le contact entre le ballon et le plan incliné communique au ballon une rotation autour d'un axe horizontal perpendiculaire à la plus grande pente de plan incliné. Cette rotation modifie la trajectoire du ballon en raccourcissant son point de chute et donne un rebond faussé. De plus si à la réception il y a contact avec une partie du corps d'un joueur, le ballon est ressenti plus durement. Enfin compte tenu de la modification du coefficient de frottement entre le ballon et le plan incliné selon que l'un et l'autre sont secs, humides, recouverts de boue... la trajectoire est très peu répétitive lors de tirs successifs.However, the contact between the balloon and the inclined plane communicates to the balloon a rotation about a horizontal axis perpendicular to the greatest slope of the inclined plane. This rotation modifies the trajectory of the ball by shortening its point of fall and gives a false rebound. In addition, if there is contact with a part of a player's body on reception, the ball is felt more harshly. Finally, taking into account the modification of the coefficient of friction between the ball and the inclined plane depending on whether both are dry, wet, covered with mud ... the trajectory is very little repetitive during successive shots.

Les brevets US-A-3277878 et US-A-2646785 décrivent des dispositifs de lancement de balle qui, à l'aide de tendeurs élastiques, communiquent progressivement la vitesse à la balle et dont le gousset, conduisant la balle sur la rampe de lancement, est garni de proéminences pour empêcher la balle de zigzaguer sur la rampe de lancement et pour limiter l'adhésion entre la balle et le gousset lors de l'éjection de la balle. Le brevet AT-B-220528 décrit un dispositif de percussion composé, au minimum, de deux éléments de percussion frappant la balle l'un après l'autre. Le premier élément de percussion frappe la balle pour la dégager de son support, le second élément de percussion frappe la balle pour lui communiquer sa vitesse définitive.Patents US-A-3277878 and US-A-2646785 describe ball launching devices which, using elastic tensioners, gradually communicate the speed to the ball and whose gusset, driving the ball on the launching pad , is provided with prominences to prevent the ball from zigzagging on the launching pad and to limit the adhesion between the ball and the gusset during the ejection of the ball. Patent AT-B-220528 describes a percussion device composed, at least, of two percussion elements hitting the ball one after the other. The first percussion element hits the ball to release it from its support, the second percussion element hits the ball to communicate its final speed.

Dans la présente invention, le dispositif de percussion, monté en bout du levier de percussion, porte plusieurs points de percussion disposés symétriquement par rapport au plan dans lequel se déplace le levier de percussion et frappant simultanément le ballon. On remédie ainsi aux imprécisions de trajectoire ci-dessus mentionnées.In the present invention, the percussion device, mounted at the end of the percussion lever, carries several percussion points arranged symmetrically with respect to the plane in which the percussion lever moves and simultaneously striking the ball. The above-mentioned trajectory inaccuracies are thus remedied.

Dans un premier exemple, présenté en figure 1, la disposition symétrique des points de percussion de l'extrémité percutante par rapport au plan perpendiculaire à l'axe de suspension du levier passant par la trajectoire de départ du ballon compense les irrégularités de surface du ballon et réduit fortement la déformation de l'enveloppe extérieure de celui-ci.In a first example, presented in FIG. 1, the symmetrical arrangement of the percussion points of the percussive end with respect to the plane perpendicular to the axis of suspension of the lever passing through the departure trajectory of the ball compensates for the irregularities of the surface of the ball and greatly reduces the deformation of the outer envelope thereof.

De la sorte, ce dispositif, appelé dispositif de percussion améliore la précision de la trajectoire du ballon.In this way, this device, called a percussion device improves the precision of the trajectory of the ball.

Dans un second exemple, présenté en figure 2, un autre dispositif, appelé dispositif de déviation, éventuellement formé de composants identiques au premier exemple, modifie la trajectoire du ballon. Il est disposé symétriquement par rapport au plan vertical passant par l'axe de tir.In a second example, presented in FIG. 2, another device, called a deflection device, possibly formed of components identical to the first example, modifies the trajectory of the ball. It is arranged symmetrically with respect to the vertical plane passing through the firing axis.

La figure 1 montre un exemple de réalisation d'un dispositif de percussion comportant plusieurs éléments de percussion. Un levier de percussion 2 est terminé par une fourche constituée de deux dents 3 équipée chacune, à l'extrémité libre, d'un axe 4 destiné à recevoir deux galets 5 libres de tourner autour de cet axe 4. L'orientation de chaque axe 4 est approximativement parallèle à l'axe de rotation selon lequel le ballon tourne lorsqu'on veut lui communiquer une trajectoire gauche. Chaque axe 4 est donc parallèle à l'axe de rotation 6 d'un dispositif de présentation 7 du ballon 8. La ballon 8 figuré en traits mixtes est posé sur une coupelle 9 de petit diamètre raccordée à un système d'aspiration non représenté qui assure le maintien du ballon 8 sur la coupelle quelle que soit la vitesse de rotation du dispositif de présentation 7.FIG. 1 shows an exemplary embodiment of a percussion device comprising several percussion elements. A percussion lever 2 is terminated by a fork made up of two teeth 3 each equipped, at the free end, with an axis 4 intended to receive two rollers 5 free to rotate around this axis 4. L'orienta tion of each axis 4 is approximately parallel to the axis of rotation along which the ball turns when we want to communicate a left trajectory. Each axis 4 is therefore parallel to the axis of rotation 6 of a presentation device 7 for the balloon 8. The balloon 8 shown in phantom is placed on a small diameter cup 9 connected to a suction system (not shown) which maintains the balloon 8 on the cup regardless of the speed of rotation of the presentation device 7.

Dans une version, non figurée, l'orientation des dents 3 de la fourche peut être réglable par un dispositif approprié pour modifier les points de percussion des galets 5 sur le ballon 8.In a version, not shown, the orientation of the teeth 3 of the fork can be adjustable by an appropriate device for modifying the percussion points of the rollers 5 on the ball 8.

Lorsque le dispositif de percussion 1 frappe, au moyen des quatre galets 5, le ballon 8 simultanément en quatre points, la déformation de l'enveloppe extérieure du ballon 8 est faible et ne contrarie pratiquement pas la rotation donnée préalablement au ballon 8 selon l'axe 6. De plus, la frappe du ballon, répartie en plusieurs points, sollicite moins son enveloppe et contribue ainsi à en réduire l'usure.When the percussion device 1 strikes, by means of the four rollers 5, the balloon 8 simultaneously at four points, the deformation of the outer envelope of the balloon 8 is small and practically does not interfere with the rotation given beforehand to the balloon 8 according to the axis 6. In addition, the striking of the ball, distributed in several points, requires less of its envelope and thus contributes to reducing wear.

La figure 2 représente un exemple de réalisation du dispositif de déviation ou de modification de la trajectoire des ballons. Un étrier 10 rendu solidaire du châssis 11 par des moyens de fixation comporte deux branches 12 disposées symétriquement par rapport au plan défini par les trajectoires d'arrivée et de départ du ballon. Cet étrier 10 sert de support à un ensemble mobile 13 qui peut osciller autour d'un axe horizontal 14, placé perpendiculairement au plan vertical passant par l'axe de tir pour occuper soit une position haute, soit une position basse comme représentée à la figure 2.FIG. 2 represents an exemplary embodiment of the device for deflecting or modifying the trajectory of the balloons. A stirrup 10 made integral with the chassis 11 by fixing means comprises two branches 12 arranged symmetrically with respect to the plane defined by the arrival and departure paths of the ball. This bracket 10 serves as a support for a mobile assembly 13 which can oscillate around a horizontal axis 14, placed perpendicular to the vertical plane passing through the firing axis to occupy either a high position or a low position as shown in the figure 2.

Cet ensemble mobile 13 comporte deux fourches 15 enfilées chacune sur une branche 12 de l'étrier 10 et réunies entre elles par un méplat 16. Chaque fourche 15 porte un axe 17, parallèle à l'axe 14, autour duquel pivote librement un rouleau 18. Ces rouleaux ou éléments de déviation 18 occupent une position symétrique par rapport au plan perpendiculaire à l'axe 14 passant par l'axe de tir.This movable assembly 13 comprises two forks 15 each threaded on a branch 12 of the stirrup 10 and joined together by a flat 16. Each fork 15 carries an axis 17, parallel to the axis 14, around which a roller 18 freely pivots These rollers or deflection elements 18 occupy a symmetrical position with respect to the plane perpendicular to the axis 14 passing through the firing axis.

Lorsque l'ensemble mobile 13 est en position basse, les rouleaux 18 ne modifient pas la trajectoire donnée au ballon 8 par le levier de percussion 2.When the mobile assembly 13 is in the low position, the rollers 18 do not modify the trajectory given to the balloon 8 by the percussion lever 2.

Par contre lorsque l'ensemble mobile 13 est maintenu en position haute, par des vis 19 engagées dans des fentes de réglage 20 des entretoises 21, les rouleaux 18 sont situés sur la trajectoire donnée au ballon 8 par le levier de percussion 2.On the other hand, when the mobile assembly 13 is held in the high position, by screws 19 engaged in adjustment slots 20 of the spacers 21, the rollers 18 are located on the path given to the balloon 8 by the percussion lever 2.

Lors du tir de ballon 8, celui-ci heurte les rouleaux 18 qui selon la position réglable de l'ensemble mobile 13 dévie plus ou moins fortement la trajectoire première du ballon pour lui donner une trajectoire modifiée plus ascendante.When shooting the ball 8, it strikes the rollers 18 which, depending on the adjustable position of the mobile assembly 13 deviates more or less strongly from the first trajectory of the ball to give it a modified more ascending trajectory.

De façon à ne pas donner une rotation parasite sensible au ballon, les rouleaux 18 sont de petit diamètre et de faible inertie. Il en est de même pour les galets (5).In order not to give a sensitive parasitic rotation to the balloon, the rollers 18 are of small diameter and of low inertia. The same is true for the rollers (5).

La position des rouleaux 5 et 18 est symétrique à la fois au plan de déplacement du bras de percussion 2 et à l'axe de tir du ballon. La symétrie par rapport au plan de déplacement du bras de percussion 2 assure, d'une part, un bon centrage du ballon 8 lorsque les rouleaux 5 le dégagent de la coupelle de positionnement 9 et le projettent en avant. La symétrie par rapport à l'axe de tir permet, d'autre part, aux rouleaux 18 de maintenir le bon guidage du ballon 8 lorsqu'il s'écrase sur ces rouleaux puis se remet en forme élastiquement pour reprendre une trajectoire plus ascendante.The position of the rollers 5 and 18 is symmetrical both to the plane of movement of the percussion arm 2 and to the shooting axis of the ball. The symmetry with respect to the plane of movement of the percussion arm 2 ensures, on the one hand, good centering of the balloon 8 when the rollers 5 release it from the positioning cup 9 and project it forward. The symmetry with respect to the firing axis allows, on the other hand, the rollers 18 to maintain the correct guiding of the balloon 8 when it crashes on these rollers and then reshapes resiliently to resume a more ascending trajectory.

Dans les exemples présentés ci-dessus, les rouleaux sont de forme cylindrique avec des bords fortement arrondis pour ne pas endommager les ballons. Mais il est évident que la forme, le diamètre ou le nombre de rouleaux peut varier pour autant que le principe d'une disposition symétrique par rapport au plan de déplacement du bras de percussion soit respecté. Par exemple, pour accentuer l'effet de centrage et de guidage les rouleaux 5 et 18 peuvent être de forme tronconique ou hyperbolique.In the examples presented above, the rollers are cylindrical in shape with strongly rounded edges so as not to damage the balloons. However, it is obvious that the shape, the diameter or the number of rollers can vary as long as the principle of a symmetrical arrangement with respect to the plane of movement of the percussion arm is respected. For example, to accentuate the centering and guiding effect, the rollers 5 and 18 can be of frustoconical or hyperbolic shape.

En adaptant, pour le lanceur de ballon par choc élastique, une disposition symétrique des rouleaux du dispositif de percussion 1 et du dispositif de déviation du ballon, on obtient des trajectoires répétitives à volonté permettant la répétition inlassable des mêmes mouvements jusqu'à l'acquisition des techniques et des réflexes voulus et qualifiant ainsi l'appareil pour un usage intensif dans les méthodes les plus poussées de l'entraînement moderne des joueurs.By adapting, for the balloon thrower by elastic shock, a symmetrical arrangement of the rollers of the percussion device 1 and of the ball deflection device, one obtains repetitive trajectories at will allowing the tireless repetition of the same movements until acquisition desired techniques and reflexes and thus qualifying the device for intensive use in the most advanced methods of modern player training.

Dans un but de simplification, on peut obtenir un résultant satisfaisant en remplaçant les rouleaux 5 et 18 par des embouts inclinés de façon convenable et recouverts de matériaux à faible coefficient de frottement.For the sake of simplification, a satisfactory result can be obtained by replacing the rollers 5 and 18 with suitably inclined end pieces covered with materials with a low coefficient of friction.

Bien entendu, l'invention n'est nullement limitée aux exemples de réalisation décrits à titre d'exemple. En particulier, elle comprend des éléments de percussion qui ne sont pas montées sur l'extrémité d'un levier de percussion, mais par exemple sur l'extrémité d'un piston.Of course, the invention is in no way limited to the exemplary embodiments described by way of example. In particular, it comprises percussion elements which are not mounted on the end of a percussion lever, but for example on the end of a piston.

Claims (6)

1. Device projecting balls by elastic impact, provided with a striker means (1) mounted on the end of a striker lever (2) or the like in order, at the end of the travel of the striker lever (2) or the like, to strike a ball (8) placed on a presentation element (7) and to project said ball along a firing axis, characterised in that the said striker means (1) is arranged to comprise a plurality of striker elements (5) which come into contact with the ball (8) simultaneously and are situated symmetrically with respect to the plane in which the striker lever (2) is displaced, and in that the said projecting device comprises a means (10, 13, 14) for causing deviation of the ball (8), said means being arranged to present or withdraw deviation-causing elements (18) which come into contact with the ball (8) simultaneously and which are arranged symmetrically with respect to the vertical plane extending down the axis of firing.
2. Device for projecting balls according to claim 1, characterised in that each striker element (5) is rotatable about a shaft (4) approximately parallel to a rotary movement shaft (6) of the presentation element (7) on which the ball (8) is placed before it is struck, in that each striker element is of a diameter markedly smaller than that of the ball (8) and of slight inertia, and in that each deviation-causing element (18) is rotatable about an axis approximately horizontal and perpendicular to the firing axis, and is also of a diameter markedly smaller than that of the ball (8) and of slight inertia.
3. Device for projecting balls according to one of the preceding claims, characterised in that the striker means (1) comprises an adjustment mechanism modifying the position of the striker elements (5) relatively to the striker lever (2).
4. Device for projecting balls according to one of the preceding claims, characterised in that the deviation-causing means (10, 13, 14) comprises an adjusting mechanism (19, 20) modifying the position of the deviation-causing elements (18) with respect to the positioning cup (9).
5. Device for projecting balls according to one of the preceding claims, characterised in that the striker means (1) comprises a fork with two prongs (3) each equipped at its free end with a shaft (4) about which rotates freely at least one wheel (5) forming a striker element and in that, at the instant of striking the ball (8), each shaft (4) is approximately parallel to the rotary shaft (6) of the element (7) presenting the ball (8).
6. Device for projecting balls according to one of the preceding claims, characterised in that the deviation-causing means comprises a stirrup (10) comprising two arms (12) on which there is attached for pivoting movement about a shaft (14) perpendicular to a vertical plane extending down the firing axis, a mobile part (13) constituted by two forks (15) rendered integral with one another by a flat element (16) and each carrying a shaft (17) which is parallel to the shaft (14) and about which there can rotate freely a roller (18) of small diameter and of low inertia, and in that the mobile part (13) has an adjusting system (19, 20) modifying the position of the rollers (18).
EP81870018A 1980-04-04 1981-04-01 Device for projecting balls with a great shooting accuracy Expired EP0037806B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81870018T ATE11872T1 (en) 1980-04-04 1981-04-01 BALL MACHINE WITH HIGH ACCURACY.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE882650 1980-04-04
BE882650 1980-04-04
EP80200886 1980-09-22
EP80200886 1980-09-22

Publications (3)

Publication Number Publication Date
EP0037806A2 EP0037806A2 (en) 1981-10-14
EP0037806A3 EP0037806A3 (en) 1982-01-06
EP0037806B1 true EP0037806B1 (en) 1985-02-20

Family

ID=25659191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81870018A Expired EP0037806B1 (en) 1980-04-04 1981-04-01 Device for projecting balls with a great shooting accuracy

Country Status (3)

Country Link
EP (1) EP0037806B1 (en)
AT (1) ATE11872T1 (en)
DE (1) DE3168992D1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335701A (en) * 1980-03-31 1982-06-22 Bozich Stan A Ball projecting apparatus with adjustable ball impact means

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646785A (en) * 1950-11-21 1953-07-28 Goldman Martin Ball throwing device
US2805063A (en) * 1955-04-05 1957-09-03 Thomas J Butler Bat and ball game apparatus
AT220528B (en) * 1959-08-12 1962-03-26 Andreas Ing Palencsar Motor-driven ball throwing device
US3277878A (en) * 1964-04-27 1966-10-11 Orlando K Pankratz Baseball throwing machine
US3470859A (en) * 1966-08-23 1969-10-07 Lorenzo J Ponza Ball throwing machine with pivotal resilient mount
NL169414C (en) * 1971-05-07 1982-07-16 Tech Handelsonderneming De Bru BALL DELIVERY TRAINING DEVICE.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335701A (en) * 1980-03-31 1982-06-22 Bozich Stan A Ball projecting apparatus with adjustable ball impact means

Also Published As

Publication number Publication date
ATE11872T1 (en) 1985-03-15
DE3168992D1 (en) 1985-03-28
EP0037806A2 (en) 1981-10-14
EP0037806A3 (en) 1982-01-06

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