EP0210539A1 - Device for ball games with a rebound screen arranged on a movable stand - Google Patents

Device for ball games with a rebound screen arranged on a movable stand Download PDF

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Publication number
EP0210539A1
EP0210539A1 EP86109730A EP86109730A EP0210539A1 EP 0210539 A1 EP0210539 A1 EP 0210539A1 EP 86109730 A EP86109730 A EP 86109730A EP 86109730 A EP86109730 A EP 86109730A EP 0210539 A1 EP0210539 A1 EP 0210539A1
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EP
European Patent Office
Prior art keywords
baffle
frame
ball
tripod
legs
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Granted
Application number
EP86109730A
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German (de)
French (fr)
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EP0210539B1 (en
Inventor
Julius Meurer
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Individual
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Individual
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Priority to AT86109730T priority Critical patent/ATE52932T1/en
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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
    • A63B69/38—Training appliances or apparatus for special sports for tennis
    • 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
    • A63B69/0097—Ball rebound walls

Definitions

  • the invention relates to a device for ball games with a baffle arranged on a portable frame.
  • a device of the above type which has a board-like baffle.
  • Such a device can be used, for example, for practicing tennis or squash strokes by a single player.
  • the known device has the disadvantage that the player has to play the baffle relatively steeply so that the ball he is playing is reflected at a reflection angle in which the player can still reach it for a next setback.
  • the player can therefore only use the relatively limited area of the baffle, from which the ball is reflected at the desired angle, so that the player is required to be accurate, which he can not muster with repeated repetitions of punching exercises.
  • the ball struck by the player is reflected by the impact wall at such a speed at such a speed that the player cannot react so quickly and can switch from a striking position to a position from which he can take the reflected ball.
  • the invention has for its object a device gangs mentioned to improve its playing characteristics.
  • the baffle has a front surface in the form of a spherical cap and that a frame which surrounds the baffle and is held on the frame is provided, on which the baffle is held with at least one flexible fastening element.
  • the front surface of the baffle designed according to the invention as a spherical cap, has particularly advantageous reflection properties and thus advantageous playing properties. If a player strikes a ball against the baffle from a standing line that has a distance from the baffle that corresponds approximately to the radius of curvature of the spherical cap, the ball passes a certain focal point on its path of reflection. Such a focal point always exists, regardless of the area in which the ball hits the front surface of the baffle and the angle at which the player stands to the front surface of the baffle. For this reason, the player always knows exactly at which point he can expect the reflected ball to strike back. Two players can also play the ball in an advantageous manner, in that each player stands in the area of the focal point that the other player struck the ball passes.
  • the device according to the invention thus ensures precise playing and playback without the player having to hit a certain area of the front surface of the baffle so that the player can concentrate on his striking technique and can use the entire front surface of the baffle.
  • the flexible fastener with which the baffle is held on the frame advantageously ensures that the baffle wall yields by giving in the flexible fastening element when a struck ball hits it and then returns to its rest position.
  • the speed of the impacting ball before the reflection is damped, the harder the ball has been hit, so that the reflected ball advantageously has only a moderate speed and can be easily struck back even with strong hits.
  • the return of the baffle to its rest position after retreating and the damping are caused in part by the air resistance of the air behind the baffle, the air being somewhat compressed when the baffle retracts.
  • the baffle itself is preferably designed to be unyielding and rigid.
  • the baffle has a margin for retreating when a ball hits, in a particularly advantageous manner in a preferred embodiment of the device, in which several fastening elements are arranged along the edge of the frame and are spaced apart from one another and with which the baffle is suspended in the frame.
  • the fastening elements are designed to be elastically resilient, preferably as elastic bands, so that restoring forces and damping forces also act on the baffle wall when the baffle wall is deflected due to the fastening elements themselves.
  • the radius of curvature of the spherical cap in a preferred embodiment is approximately 6 to 8 m, preferably 7 m, and the diameter of the circular outer edge of the spherical cap is approximately 2 m.
  • the best game distance from the baffle corresponds approximately to the radius of curvature. This game distance is approximately 7 m approximately the normal playing conditions in tennis or squash.
  • the spherical cap which has a surface diameter of approximately 2 m, can be easily hit by inexperienced players from this distance and is small enough to be transported by the player through front doors or the like.
  • the baffle is preferably provided with polyester reinforced with glass fiber.
  • the baffle can be adjusted to the size of the respective player and optionally high or low balls can be practiced, the baffle can be adjusted in its inclination to the vertical according to a development of the invention to improve the playing properties of the device according to the invention.
  • the frame is preferably a tripod, the legs of which form approximately a tetrahedron, of which two legs are connected to one another by the frame of the baffle and the third leg of which is adjustable in length for adjusting the inclination of the baffle.
  • the device according to the invention can have a joint via which the legs of the tripod are connected to one another at their upper ends, as a result of which the inclination of the baffle wall is also adjustable and as a result of which the frame is advantageously designed to be collapsible.
  • a device according to the invention is shown in a front view in FIG.
  • the device has a frame 2 arranged on a frame 1, which holds a baffle 3.
  • the frame 1 is designed as a tetrahedral tripod, and the frame 2 is arranged on two legs 4b, c of the tripod, while the third leg 4a of the tripod legs 4b, c of the tripod and the frame 2 arranged thereon at a predetermined angle of inclination to the vertical holds.
  • the frame 2 and the baffle wall 3 held therein have a circular outline and the baffle wall 3 is resiliently suspended in the frame 2 with a plurality of fastening elements 6 arranged at intervals along its edge.
  • the fasteners 6 are arranged on the edge of the baffle 3 rubber bands that wrap around the profile of the frame 2.
  • a ball opening 7 In the center of the baffle 3 there is a ball opening 7 through which a ball can be played.
  • a ball catch 8 is arranged behind the ball opening 7 and acts as a ball opening 7 spanning network is formed.
  • FIG. 2 shows a side view of the device of FIG. 1, in which the baffle 3 is shown in a longitudinal section.
  • the same components are identified by the same reference numerals as in FIG. 1.
  • Fig. 2 it can be seen in particular that the front surface 9 of the baffle 3 is concave in the form of a spherical cap. Furthermore, it can be seen that the two front legs 4b, c of the tripod with the third, rear leg 4a of the tripod are connected to one another via a joint 10, which collapses the frame 1 and adjusts the angle of inclination of the baffle wall 3 with respect to the vertical allowed.
  • the rear leg 4a of the tripod has an extension section 11 which can be pushed in and pushed out, which is equipped with locking elements which fix its extended position and which also changes the angle of inclination of the baffle 3 even at a constant angle between the front legs 4b, c and the rear leg 4a of the tripod allowed, so that the joint 10 is not absolutely necessary.
  • the front legs 4b, c can be connected to the rear leg 4a on the frame 1, connecting elements, bands, chains, rods or the like which can be adapted to the angular position of the joint 10 , be provided.
  • Fig. 3 shows a cross section of the baffle 3 with frame 2, but without frame 1 and without ball catch 8, to make the special spatial shape of a spherical cap of the front surface 9 of the baffle 3 clear again.
  • the same components are designated with the same reference numbers as in the previous figures.
  • Fig. 4 the baffle 3 is indicated schematically, as shown in Fig. 3, wherein it is made clear by a circular arc 12 that the baffle 3 has the shape of a spherical cap.
  • Dashed lines indicate examples of ball trajectories 13 along which a ball, for example a tennis ball, would fly, which would be knocked off from a teeing point 14 in the direction of the outer edges of the baffle 3.
  • Fig. 4 it can be seen that the ball regardless of the ball trajectory 13, provided that it has no swirl, is reflected on the baffle 3 according to the law of reflection, angle of incidence equal to angle of reflection, and flies through a focal point 15, in which all Unite ball trajectories 13.
  • the device according to the invention is particularly suitable for two players who stand on opposite sides of the normal to the center surface 16 of the baffle 3 and pass a ball to each other because the ball flies through a focal point which is dependent on the distance between the players, regardless of the teeing angle from the baffle 3, for example focal point 15, and is thus calculable for the players.
  • FIG. 5 shows a diagram similar to that in FIG. 4, but in a side view.
  • the baffle in this example has an inclination angle of 10 * to the vertical. 5 shows that a ball, depending on whether it is hit from a lower tee 17 or from a higher tee 18, flies along dashed ball trajectories 19, 20 which intersect at a focal point 21, so that a hit ball can also be calculated in its flight height.

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  • Health & Medical Sciences (AREA)
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  • Physical Education & Sports Medicine (AREA)
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  • Vehicle Body Suspensions (AREA)
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Abstract

A ball-game device comprising a baffle wall arranged on a transportable stand is characterized by the fact that the baffle wall has a front surface designed in the shape of a spherical indentation, and there is provided a frame. The frame surrounds the baffle wall and is supported on the stand. The baffle wall is, in turn, supported on the frame by means of at least one flexible fastening element.

Description

Die Erfindung betrifft ein Gerät für Ballspiele mit einer an einem transportablen Gestell angeordneten Prallwand.The invention relates to a device for ball games with a baffle arranged on a portable frame.

Aus der US-PS 20 21 989 ist ein Gerät der obengenannten Gattung bekannt, welches eine brettartige Prallwand aufweist. Ein solches Gerät kann beispielsweise zum Üben von Tennis- oder Squashschlägen von einem Einzelspieler genutzt werden. Das bekannte Gerät hat jedoch den Nachteil, daß der Spieler die Prallwand relativ steil anspielen muß, damit der von ihm gespielte Ball in einem Reflexionswinkel reflektiert wird, in dem er vom Spieler fJr einen nächsten Rückschlag noch zu erreichen ist. Der Spieler kann daher nur den relativ begrenzten Flächenbereich der Prallwand nutzen, von dem der Ball im gewünschten Winkel reflektiert wird, so daß vom Spieler eine Treffsicherheit gefordert wird, die er bei flüssiger Wiederholung von Schlagübungen nicht aufbringen kann. Zudem wird der vom Spieler geschlagene Ball bei starken Schlägen mit einer solchen Geschwindigkeit von der Prallwand reflektiert, daß der Spieler nicht so schnell reagieren und von einer Schlagstellung auf eine Stellung umstellen kann, aus der er den reflektierten Ball annehmen kann. Diese ungünstigen Eigenschaften des bekannten Gerätes haben zur Folge, daß der Spieler froh ist, wenn er den reflektierten Ball für ein Zurückspiel an die Prallwand noch erreicht, wobei er nicht mehr auf bestimmte Spieltechniken achten kann, die er vielleicht gerne einüben möchte.From US-PS 20 21 989 a device of the above type is known, which has a board-like baffle. Such a device can be used, for example, for practicing tennis or squash strokes by a single player. However, the known device has the disadvantage that the player has to play the baffle relatively steeply so that the ball he is playing is reflected at a reflection angle in which the player can still reach it for a next setback. The player can therefore only use the relatively limited area of the baffle, from which the ball is reflected at the desired angle, so that the player is required to be accurate, which he can not muster with repeated repetitions of punching exercises. In addition, the ball struck by the player is reflected by the impact wall at such a speed at such a speed that the player cannot react so quickly and can switch from a striking position to a position from which he can take the reflected ball. These unfavorable properties of the known device mean that the player is happy when he still reaches the reflected ball for a return game to the baffle wall, whereby he can no longer pay attention to certain playing techniques that he may like to practice.

Der Erfindung liegt die Aufgabe zugrunde, ein Gerät der eingangs genannten Gattung hinsichtlich seiner Spieleigenschaften zu verbessern.The invention has for its object a device gangs mentioned to improve its playing characteristics.

Die Aufgabe ist erfindungsgemäß dadurch gelöst worden, daß die Prallwand eine in Form einer Kugelkalotte ausgebildete Frontfläche aufweist und daß ein die Prallwand umgebender, am Gestell gehaltener Rahmen vorgesehen ist, an dem die Prallwand mit wenigstens einem flexiblen Befestigungselement gehalten ist.The object has been achieved in that the baffle has a front surface in the form of a spherical cap and that a frame which surrounds the baffle and is held on the frame is provided, on which the baffle is held with at least one flexible fastening element.

Die erfindungsgemäß als Kugelkalotte ausgebildete Frontfläche der Prallwand weist besonders vorteilhafte Reflexionseigenschaften und damit vorteilhafte Spieleigenschaften auf. Schlägt ein Spieler einen Ball von einer Standlinie aus, die zur Prallwand eine Entfernung besitzt, welche etwa dem Kugelkrümmungsradius der Kugelkalotte entspricht, gegen die Prallwand, so passiert der Ball auf seinem Reflexionsweg einen bestimmten Brennpunkt. Ein solcher Brennpunkt existiert immer, unabhängig davon, in welchem Bereich der Ball auf die Frontfläche der Prallwand auftrifft und in welchem Winkel der Spieler zur Frontfläche der Prallwand steht. Aus diesem Grunde weiß der Spieler immer genau, in welchem Punkt er den reflektierten Ball zum Zurückschlagen erwarten muß. Auch zwei Spieler können sich den Ball in vorteilhafter Weise zuspielen, indem jeder Spieler jeweils im Bereich des Brennpunktes steht, den der Ball von dem anderen Spieler geschlagen passiert. Ein präzises Spielen und Zuspielen wird von dem erfindungsgemäßen Gerät also gewährleistet, ohne daß der Spieler treffsicher einen bestimmten Bereich der Frontfläche der Prallwand treffen muß, so daß der Spieler sich auf seine Schlagtechnik konzentrieren kann und die gesamte Frontfläche der Prallwand ausnutzen kann.The front surface of the baffle, designed according to the invention as a spherical cap, has particularly advantageous reflection properties and thus advantageous playing properties. If a player strikes a ball against the baffle from a standing line that has a distance from the baffle that corresponds approximately to the radius of curvature of the spherical cap, the ball passes a certain focal point on its path of reflection. Such a focal point always exists, regardless of the area in which the ball hits the front surface of the baffle and the angle at which the player stands to the front surface of the baffle. For this reason, the player always knows exactly at which point he can expect the reflected ball to strike back. Two players can also play the ball in an advantageous manner, in that each player stands in the area of the focal point that the other player struck the ball passes. The device according to the invention thus ensures precise playing and playback without the player having to hit a certain area of the front surface of the baffle so that the player can concentrate on his striking technique and can use the entire front surface of the baffle.

Das flexible Befestigungselement, mit dem die Prallwand an dem Rahmen gehalten ist, sorgt mit Vorteil dafür, daß die Prallwand durch Nachgeben des flexiblen Befestigungselementes bei Auftreffen eines geschlagenen Balles zurückweicht und dann wieder in ihre Ruhelage zurückkehrt. Durch das Zurückweichen der Prallwand wird die Geschwindigkeit des auftreffenden Balles vor der Reflexion desto stärker gedämpft, je kräfter der Ball geschlagen worden ist, so daß der reflektierte Ball auch bei kräftigen Schlägen mit Vorteil nur eine mäßige Geschwindigkeit aufweist und bequem zurückgeschlagen werden kann. Die Rückkehr der Prallwand in ihre Ruhelage nach einem Zurückweichen und die Dämpfung werden zum Teil durch den Luftwiderstand der hinter der Prallwand befindlichen Luft verursacht, wobei die Luft beim Zurückweichen der Prallwand etwas komprimiert wird. Die Prallwand selbst ist vorzugsweise unnachgiebig und biegesteif ausgebildet.The flexible fastener with which the baffle is held on the frame advantageously ensures that the baffle wall yields by giving in the flexible fastening element when a struck ball hits it and then returns to its rest position. By retreating the baffle, the speed of the impacting ball before the reflection is damped, the harder the ball has been hit, so that the reflected ball advantageously has only a moderate speed and can be easily struck back even with strong hits. The return of the baffle to its rest position after retreating and the damping are caused in part by the air resistance of the air behind the baffle, the air being somewhat compressed when the baffle retracts. The baffle itself is preferably designed to be unyielding and rigid.

Einen Spielraum zum Zurückweichen bei Auftreffen eines Balles besitzt die Prallwand in besonders vorteilhafter Weise bei einer bevorzugten Ausbildung des Gerätes, bei der entlang des Randes des Rahmens mehrere in Abständen zueinander verteilt angeordnete Befestigungselemente vorgesehen sind, mit denen die Prallwand im Rahmen aufgehängt ist. Durch die Aufhängung der Prallwand im Rahmen wird eine Bewegung der Prallwand durch den Rahmen nicht behindert, weil die Prallwand nicht am Rahmen anschlägt.The baffle has a margin for retreating when a ball hits, in a particularly advantageous manner in a preferred embodiment of the device, in which several fastening elements are arranged along the edge of the frame and are spaced apart from one another and with which the baffle is suspended in the frame. By suspending the baffle in the frame, movement of the baffle through the frame is not impeded because the baffle does not strike the frame.

Die Befestigungselemente sind bei einer bevorzugten Ausbildung elastisch federnd, vorzugsweise als Gummizüge, ausgebildet, so daß auch durch die Befestigungselemente selbst Rückstellkräfte und Dämpfungskräfte auf die Prallwand bei Auslenkung der Prallwand wirken.In a preferred embodiment, the fastening elements are designed to be elastically resilient, preferably as elastic bands, so that restoring forces and damping forces also act on the baffle wall when the baffle wall is deflected due to the fastening elements themselves.

Der Kugelkrümmungsradius der Kugelkalotte beträgt bei einer bevorzugten Ausbildung etwa 6 bis 8 m, vorzugsweise 7 m, und der Durchmesser des kreisförmigen Außenrandes der Kugelkalotte beträgt etwa 2 m. Die beste Spielentfernung von der Prallwand entspricht etwa dem Kugelkrümmungsradius. Dieser Spielabstand beträgt bei etwa 7 m ungefähr den normalen Spielgegebenheiten beim Tennis- oder beim Squashspiel. Die etwa einen 2 m großen Flächendurchmesser aufweisende Kugelkalotte kann aus dieser Entfernung auch von ungeübten Spielern ohne weiteres getroffen werden und ist klein genug, um von dem Spieler auch durch Haustüren oder ähnliches transportiert zu werden.The radius of curvature of the spherical cap in a preferred embodiment is approximately 6 to 8 m, preferably 7 m, and the diameter of the circular outer edge of the spherical cap is approximately 2 m. The best game distance from the baffle corresponds approximately to the radius of curvature. This game distance is approximately 7 m approximately the normal playing conditions in tennis or squash. The spherical cap, which has a surface diameter of approximately 2 m, can be easily hit by inexperienced players from this distance and is small enough to be transported by the player through front doors or the like.

Als Werkstoff mit besonders günstigen Spieleigenschaften, der zudem preisgünstig und in einfacher Weise zu verarbeiten ist, ist für die Prallwand vorzugsweise mit Glasfaser verstärkter Polyester vorgesehen.As a material with particularly favorable playing properties, which is also inexpensive and easy to process, the baffle is preferably provided with polyester reinforced with glass fiber.

Damit die Prallwand auf die Größe des jeweiligen Spielers eingestellt werden kann und wahlweise hohe oder tiefe Bälle geübt werden können, ist nach einer Weiterbildung der Erfindung zur Verbesserung der Spieleigenschaften des erfindungsgemäßen Gerätes die Prallwand in ihrer Neigung zur Lotrechten verstellbar.So that the baffle can be adjusted to the size of the respective player and optionally high or low balls can be practiced, the baffle can be adjusted in its inclination to the vertical according to a development of the invention to improve the playing properties of the device according to the invention.

Das Gestell ist vorzugsweise ein Dreibein, dessen Beine etwa ein Tetraeder bilden, von denen zwei Beine durch den Rahmen der Prallwand miteinander verbunden sind und dessen drittes Bein zur Neigungsverstellung der Prallwand längenveränderbar ausgebildet ist.The frame is preferably a tripod, the legs of which form approximately a tetrahedron, of which two legs are connected to one another by the frame of the baffle and the third leg of which is adjustable in length for adjusting the inclination of the baffle.

Das erfindungsgemäße Gerät kann alternativ oder zusätzlich zu dem längenveränderbaren dritten Bein ein Gelenk aufweisen, über das die Beine des Dreibeines an ihren oberen Enden miteinander verbunden sind, wodurch ebenfalls die Neigung der Prallwand verstellbar ist und wodurch das Gestell in vorteilhafter Weise zusammenklappbar ausgebildet ist.As an alternative or in addition to the length-adjustable third leg, the device according to the invention can have a joint via which the legs of the tripod are connected to one another at their upper ends, as a result of which the inclination of the baffle wall is also adjustable and as a result of which the frame is advantageously designed to be collapsible.

Ein Ausführungsbeispiel, aus dem sich weitere erfinderische Merkmale ergeben, ist in der Zeichnung dargestellt. Es zeigen:

  • Fig. 1 eine Vorderansicht eines erfindungsgemäßen Gerätes,
  • Fig. 2 eine teilweise geschnitten dargestellte Seitenansicht des Gerätes gemäß Fig. l,
  • Fig. 3 die Prallwand eines Gerätes gemäß Fig. 1 und 2 in einem Querschnitt,
  • Fig. 4 eine schematische Darstellung von Ballflugbahnen in einer Draufsicht bei Verwendung des Gerätes gemäß der vorhergehenden Figuren und
  • Fig. 5 eine schematische Darstellung von Ballflugbahnen in einer Seitenansicht.
An embodiment from which further inventive features result is shown in the drawing. Show it:
  • 1 is a front view of a device according to the invention,
  • 2 is a partially sectioned side view of the device of FIG. 1,
  • 3 shows the baffle of a device according to FIGS. 1 and 2 in a cross section,
  • Fig. 4 is a schematic representation of ball trajectories in a plan view when using the device according to the preceding figures and
  • Fig. 5 is a schematic representation of ball trajectories in a side view.

In Fig. l ist ein erfindungsgemäßes Gerät in einer Vorderansicht dargestellt. Das Gerät weist einen an einem Gestell 1 angeordneten Rahmen 2 auf, der eine Prallwand 3 hält. Das Gestell 1 ist als tetraederförmiges Dreibein ausgebildet, und der Rahmen 2 ist an zwei Beinen 4b,c des Dreibeins angeordnet, während das dritte Bein 4a des Dreibeins die Beine 4b,c des Dreibeins und den daran angeordneten Rahmen 2 in einem vorbestimmten Neigungswinkel zur Lotrechten hält.A device according to the invention is shown in a front view in FIG. The device has a frame 2 arranged on a frame 1, which holds a baffle 3. The frame 1 is designed as a tetrahedral tripod, and the frame 2 is arranged on two legs 4b, c of the tripod, while the third leg 4a of the tripod legs 4b, c of the tripod and the frame 2 arranged thereon at a predetermined angle of inclination to the vertical holds.

Der Rahmen 2 und die darin gehaltene Prallwand 3 weisen einen kreisförmigen Umriß auf und die Prallwand 3 ist mit mehreren entlang ihres Randes in Abständen zueinander angeordneten Befestigungselementen 6 im Rahmen 2 federnd aufgehängt. Die Befestigungselemente 6 sind an dem Rand der Prallwand 3 angeordnete Gummizüge, die das Profil des Rahmens 2 umschlingen.The frame 2 and the baffle wall 3 held therein have a circular outline and the baffle wall 3 is resiliently suspended in the frame 2 with a plurality of fastening elements 6 arranged at intervals along its edge. The fasteners 6 are arranged on the edge of the baffle 3 rubber bands that wrap around the profile of the frame 2.

Im Zentrum der Prallwand 3 ist eine Ballöffnung 7 angeordnet, durch die ein Ball hindurchgespielt werden kann. Um ein Verlorengehen des Balles zu verhindern, ist hinter der Ballöffnung 7 ein Ballauffang 8 angeordnet, der als ein die Ballöffnung 7 überspannendes Netz ausgebildet ist.In the center of the baffle 3 there is a ball opening 7 through which a ball can be played. In order to prevent the ball from getting lost, a ball catch 8 is arranged behind the ball opening 7 and acts as a ball opening 7 spanning network is formed.

Fig. 2 zeigt eine Seitenansicht des Gerätes gemäß Fig. l, in der die Prallwand 3 in einem Längsschnitt dargestellt ist. Gleiche Bauelemente sind mit gleichen Bezugszahlen bezeichnet, wie in Fig. l.Fig. 2 shows a side view of the device of FIG. 1, in which the baffle 3 is shown in a longitudinal section. The same components are identified by the same reference numerals as in FIG. 1.

In Fig. 2 ist insbesondere zu erkennen, daß die Frontfläche 9 der Prallwand 3 in Form einer Kugelkalotte konkav ausgebildet ist. Des weiteren ist zu erkennen, daß die beiden vorderen Beine 4b,c des Dreibeins mit dem dritten, hinteren Pein 4a des Dreibeins über ein Gelenk 10 miteinander verbunden sind, welches ein Zusammenklappen des Gestells 1 und ein Verstellen des Neigungswinkels der Prallwand 3 gegenüber der Lotrechten erlaubt. Zur Einstellung des Neigungswinkels der Prallwand 3 weist das hintere Bein 4a des Dreibeins einen ein- und ausschiebbaren Verlängerungsabschnitt 11 auf, der mit seine Auszugsstellung fixierenden Rastelementen ausgerüstet ist und der eine Änderung des Neigungswinkels der Prallwand 3 auch bei konstantem Winkel zwischen den vorderen Beinen 4b,c und dem hinteren Bein 4a des Dreibeines erlaubt, so daß das Gelenk 10 nicht unbedingt notwendig ist. Um ein Auseinanderklappen der drei Beine 4a,b,c des Gestells 1 zu verhindern, können am Gestell 1 die vorderen Beine 4b,c mit dem hinteren Bein 4a verbindende, an die Winkelstellung des Gelenkes 10 anpaßbare Verbindungselemente, Bänder, Ketten, Stangen oder dergleichen, vorgesehen sein.In Fig. 2 it can be seen in particular that the front surface 9 of the baffle 3 is concave in the form of a spherical cap. Furthermore, it can be seen that the two front legs 4b, c of the tripod with the third, rear leg 4a of the tripod are connected to one another via a joint 10, which collapses the frame 1 and adjusts the angle of inclination of the baffle wall 3 with respect to the vertical allowed. In order to adjust the angle of inclination of the baffle 3, the rear leg 4a of the tripod has an extension section 11 which can be pushed in and pushed out, which is equipped with locking elements which fix its extended position and which also changes the angle of inclination of the baffle 3 even at a constant angle between the front legs 4b, c and the rear leg 4a of the tripod allowed, so that the joint 10 is not absolutely necessary. In order to prevent the three legs 4a, b, c of the frame 1 from unfolding, the front legs 4b, c can be connected to the rear leg 4a on the frame 1, connecting elements, bands, chains, rods or the like which can be adapted to the angular position of the joint 10 , be provided.

Fig. 3 zeigt einen Querschnitt der Prallwand 3 mit Rahmen 2, aber ohne Gestell 1 und ohne Ballauffang 8, um noch einmal die spezielle Raumform einer Kugelkalotte der Frontfläche 9 der Prallwand 3 deutlich zu machen. Gleiche Bauelemente sind mit gleichen Bezugszahlen bezeichnet wie in den vorhergehenden Figuren.Fig. 3 shows a cross section of the baffle 3 with frame 2, but without frame 1 and without ball catch 8, to make the special spatial shape of a spherical cap of the front surface 9 of the baffle 3 clear again. The same components are designated with the same reference numbers as in the previous figures.

In Fig. 4 ist die Prallwand 3 schematisch angedeutet, wie sie in Fig. 3 dargestellt ist, wobei durch einen Kreisbogen 12 noch einmal deutlich gemacht ist, daß die Prallwand 3 die Form einer Kugelkalotte aufweist.In Fig. 4 the baffle 3 is indicated schematically, as shown in Fig. 3, wherein it is made clear by a circular arc 12 that the baffle 3 has the shape of a spherical cap.

Mit gestrichelten Linien sind Beispiele für Ballflugbahnen 13 angedeutet, entlang der ein Ball, beispielsweise ein Tennisball, flöge, der von einem Abschlagpunkt 14 in Richtung der äußeren Ränder der Prallwand 3 abgeschlagen würde. In der Fig. 4 ist zu erkennen, daß der Ball unabhängig von der Ballflugbahn 13, vorausgesetzt er weist keinen Drall auf, an der Prallwand 3 gemäß dem Reflexionsgesetz, Einfallswinkel gleich Ausfallswinkel, reflektiert wird und durch einen Brennpunkt 15 fliegt, in dem sich sämtliche Ballflugbahnen 13 vereinigen. Dies zeigt, daß sich das erfindungsgemäße Gerät insbesondere auch für zwei Spieler eignet, die auf gegenüberliegenden Seiten der Zentrumsflächennormalen 16 der Prallwand 3 stehen und sich einen Ball gegenseitig zuspielen, weil der Ball unabhängig vom Abschlagswinkel durch einen Brennpunkt fliegt, der abhängig vom Abstand der Spieler von der Prallwand 3 ist, beispielsweise Brennpunkt 15, und so für die Spieler kalkulierbar ist.Dashed lines indicate examples of ball trajectories 13 along which a ball, for example a tennis ball, would fly, which would be knocked off from a teeing point 14 in the direction of the outer edges of the baffle 3. In Fig. 4 it can be seen that the ball regardless of the ball trajectory 13, provided that it has no swirl, is reflected on the baffle 3 according to the law of reflection, angle of incidence equal to angle of reflection, and flies through a focal point 15, in which all Unite ball trajectories 13. This shows that the device according to the invention is particularly suitable for two players who stand on opposite sides of the normal to the center surface 16 of the baffle 3 and pass a ball to each other because the ball flies through a focal point which is dependent on the distance between the players, regardless of the teeing angle from the baffle 3, for example focal point 15, and is thus calculable for the players.

In Fig. 5 ist ein ähnliches Schema wie in Fig. 4, jedoch in einer Seitenansicht, dargestellt. Die Prallwand weist in diesem Beispiel einen Neigungswinkel von 10* zur Lotrechten auf. In der Fig. 5 ist gezeigt, daß ein Ball, umabhängig davon, ob er von einem tiefer gelegenen Abschlagspunkt 17 oder von einem höher gelegenen Aschlagspunkt 18 abgeschlagen wird, entlang gestrichelt dargesteller Ballflugbahnen 19, 20 fliegt, die sich in einem Brennpunkt 21 kreuzen, so daß ein abgeschlagener Ball auch in seiner Flughöhe kalkulierbar ist.FIG. 5 shows a diagram similar to that in FIG. 4, but in a side view. The baffle in this example has an inclination angle of 10 * to the vertical. 5 shows that a ball, depending on whether it is hit from a lower tee 17 or from a higher tee 18, flies along dashed ball trajectories 19, 20 which intersect at a focal point 21, so that a hit ball can also be calculated in its flight height.

Claims (8)

Gerät fJr Ballspiele mit einer an einem transportablen Gestell angeordneten Prallwand,
dadurch gekennzeichnet,
daß die Prallwand (3) eine in Form einer Kugelkalotte ausgebildete Frontfläche (9) aufweist und daß ein die Prallwand (3) umgebender, am Gestell (1) gehaltener Rahmen (2) vorgesehen ist, an dem die Prallwand (3) mit wenigstens einem flexiblen Befestigungselement (6) gehalten ist.Device for ball games with a baffle arranged on a portable frame,
characterized,
that the baffle (3) has a front surface (9) in the form of a spherical cap and that a frame (2) is provided which surrounds the baffle (3) and is held on the frame (1) and on which the baffle (3) with at least one flexible fastener (6) is held. 2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß entlang des Randes des Rahmens (2) mehrere in regelmäßigen Abständen zueinander verteilt angeordnete Befestigungselemente (6) vorgesehen sind, mit denen die Prallwand (3) im Rahmen (2) aufgehängt ist.2. Apparatus according to claim 1, characterized in that along the edge of the frame (2) a plurality of spaced-apart fastening elements (6) are provided with which the baffle (3) is suspended in the frame (2). 3. Gerät nach Anspruch 2, dadurch gekennzeichnet, daß die Befestigungselemente elastisch federnd, vorzugsweise als Gummizüge, ausgebildet sind.3. Apparatus according to claim 2, characterized in that the fastening elements are elastically resilient, preferably as rubber bands. 4. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kugelkrümmungsradius der Kugelkalotte etwa 6 bis 8 Meter, vorzugsweise 7 Meter, beträgt und daß der Durchmesser des kreisförmigen Außenrandes der Kugelkalotte etwa 2 Meter beträgt.4. Device according to one of the preceding claims, characterized in that the radius of curvature of the spherical cap is about 6 to 8 meters, preferably 7 meters, and that the diameter of the circular outer edge of the spherical cap is about 2 meters. 5. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Werkstoff für die Prallwand (3) mit Glasfaser verstärkter Polyester ist.5. Device according to one of the preceding claims, characterized in that the material for the baffle (3) is reinforced with glass fiber polyester. 6. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Prallwand (3) in ihrer Neigung zur Lotrechten verstellbar ist.6. Device according to one of the preceding claims, characterized in that the baffle (3) is adjustable in its inclination to the vertical. 7. Gerät nach Anspruch 6, dadurch gekennzeichnet, daß das Gestell (1) ein Dreibein ist, dessen Beine (4a, b, c) etwa ein Tetraeder bilden, von denen zwei Beine (4b, c) durch den Rahmen (2) der Prallwand (3) miteinander verbunden sind und dessen drittes Bein (4a) zur Neigungsverstellung der Prallwand längenveränderbar ausgebildet ist.7. Apparatus according to claim 6, characterized in that the frame (1) is a tripod, the legs (4a, b, c) about a tetra eder form, of which two legs (4b, c) are connected to each other by the frame (2) of the baffle (3) and the third leg (4a) is adjustable in length to adjust the inclination of the baffle. 8. Gerät nach Anspruch 7, dadurch gekennzeichnet, daß das Dreibein ein Gelenk (10) aufweist, über das die Beine (4a, b, c) des Dreibeins an ihren oberen Enden miteinander verbunden sind.8. Apparatus according to claim 7, characterized in that the tripod has a joint (10) via which the legs (4a, b, c) of the tripod are connected to one another at their upper ends.
EP86109730A 1985-07-27 1986-07-16 Device for ball games with a rebound screen arranged on a movable stand Expired - Lifetime EP0210539B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109730T ATE52932T1 (en) 1985-07-27 1986-07-16 DEVICE FOR BALL GAME HAVING A BUMPER DISPOSED ON A TRANSPORTABLE FRAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3526956 1985-07-27
DE19853526956 DE3526956A1 (en) 1985-07-27 1985-07-27 DEVICE FOR BALL GAMES

Publications (2)

Publication Number Publication Date
EP0210539A1 true EP0210539A1 (en) 1987-02-04
EP0210539B1 EP0210539B1 (en) 1990-05-23

Family

ID=6276965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109730A Expired - Lifetime EP0210539B1 (en) 1985-07-27 1986-07-16 Device for ball games with a rebound screen arranged on a movable stand

Country Status (10)

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US (1) US4743020A (en)
EP (1) EP0210539B1 (en)
JP (1) JPS6331686A (en)
KR (1) KR870000946A (en)
AT (1) ATE52932T1 (en)
AU (1) AU585773B2 (en)
BR (1) BR8603526A (en)
DE (2) DE3526956A1 (en)
ES (1) ES2000554A6 (en)
PT (1) PT83072B (en)

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AU636331B2 (en) * 1989-02-20 1993-04-29 Philip Gerard Way Apparatus for playing a game
US5333855A (en) * 1992-07-20 1994-08-02 Connie J. Silin Baseball pitching analyzer
US5527032A (en) * 1994-04-01 1996-06-18 Ballwall, Inc. Multiple sport practice system
GB9524277D0 (en) * 1995-11-28 1996-01-31 Dance L A The lofted rebound wall
US5709620A (en) * 1996-03-27 1998-01-20 Reinprecht; Christine K. Sport court training target assembly
AU4231697A (en) 1996-08-19 1998-03-06 Lievens Group, L.L.C. Ball rebound net
ES2608204B2 (en) * 2015-10-06 2017-08-08 Universidad De Extremadura Multipurpose goal for small and enclosed sports spaces
US20170340938A1 (en) * 2017-06-14 2017-11-30 James A. Hefti Device, system and method for use with a ball game
USD1014631S1 (en) * 2020-07-23 2024-02-13 Lark Henders Yard game

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GB1286326A (en) * 1968-09-18 1972-08-23 Tranly Walls And Mini Courts P Improvements relating to wall structures for the practise of ball games
DE2542984A1 (en) * 1975-09-26 1977-03-31 Spannbetonwerk Koch Kg Parabolic practice wall for tennis strokes - is made from prefabricated mobile wall sections linked by profiled joining strips leaving no gaps
DE2558968A1 (en) * 1975-12-29 1977-07-07 Dietrich Steinkopff Wall for training for ball games - has concave surface to prevent ball rebounding too far from player
US4421318A (en) * 1982-04-01 1983-12-20 David Sverdlik Adjustable rebound apparatus
GB2141941A (en) * 1982-12-24 1985-01-09 Charles William Dransfield Rebound screen for ball games

Also Published As

Publication number Publication date
US4743020A (en) 1988-05-10
BR8603526A (en) 1987-03-04
ATE52932T1 (en) 1990-06-15
EP0210539B1 (en) 1990-05-23
AU6059086A (en) 1987-01-29
AU585773B2 (en) 1989-06-22
ES2000554A6 (en) 1988-03-01
JPS6331686A (en) 1988-02-10
KR870000946A (en) 1987-03-10
PT83072A (en) 1986-08-01
PT83072B (en) 1992-08-31
DE3671382D1 (en) 1990-06-28
DE3526956A1 (en) 1987-01-29

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