EP0372249B1 - Device for collecting balls, especially tennis balls, and/or for smoothing a game court - Google Patents

Device for collecting balls, especially tennis balls, and/or for smoothing a game court Download PDF

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Publication number
EP0372249B1
EP0372249B1 EP89120769A EP89120769A EP0372249B1 EP 0372249 B1 EP0372249 B1 EP 0372249B1 EP 89120769 A EP89120769 A EP 89120769A EP 89120769 A EP89120769 A EP 89120769A EP 0372249 B1 EP0372249 B1 EP 0372249B1
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EP
European Patent Office
Prior art keywords
ball
balls
collector arm
disposed
collector
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 - Lifetime
Application number
EP89120769A
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German (de)
French (fr)
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EP0372249A1 (en
Inventor
Bruno Wilbert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRANSITA VERTRIEBS- und HANDELSGESELLSCHAFT mbH
Original Assignee
TRANSITA VERTRIEBS- und HANDELSGESELLSCHAFT mbH
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Priority to AT89120769T priority Critical patent/ATE84978T1/en
Publication of EP0372249A1 publication Critical patent/EP0372249A1/en
Application granted granted Critical
Publication of EP0372249B1 publication Critical patent/EP0372249B1/en
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B47/00Devices for handling or treating balls, e.g. for holding or carrying balls
    • A63B47/02Devices for handling or treating balls, e.g. for holding or carrying balls for picking-up or collecting
    • A63B47/025Installations continuously collecting balls from the playing areas, e.g. by gravity, with conveyor belts
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B47/00Devices for handling or treating balls, e.g. for holding or carrying balls
    • A63B47/02Devices for handling or treating balls, e.g. for holding or carrying balls for picking-up or collecting
    • A63B47/024Devices for handling or treating balls, e.g. for holding or carrying balls for picking-up or collecting for collecting by using a sweeping means moving across the playing surface
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2208/00Characteristics or parameters related to the user or player
    • A63B2208/12Characteristics or parameters related to the user or player specially adapted for children

Definitions

  • the invention relates to a device for collecting tennis balls with a collecting arm which can be moved transversely to its longitudinal axis over the floor of a tennis court with a net.
  • the ball collection process is an interruption in the game and training process, which can be undesirable for many reasons.
  • a ball-throwing machine is used to train one or more tennis players, which delivers a large number of balls in a relatively short time
  • the ball-collecting process takes a relatively long time in relation to the effective training time and thus increases the relative effort for the training, especially if the ball throwing machine and / or the space is rented per unit of time, in particular by the hour.
  • the ball-picking process is unpopular because it is not itself a sporting activity.
  • Ball collecting devices with a movable collecting arm are therefore already known, which are intended to facilitate the collection of the tennis balls.
  • the collecting arm extends in the starting position along the side edge of the field and can be pivoted by about 90 ° into a position extending along the rear edge of the field to collect the balls lying on the field.
  • the basic disadvantages of this construction is that a pivotable collecting arm cannot cover the entire area of one half of the playground and the edge areas.
  • a collecting arm which extends parallel to the net, is approximately as long as it is and can be moved in the longitudinal direction of the playground to the rear edge thereof for collecting the balls. There, the collecting arm pushes the balls onto a ball receiving channel which extends along the rear edge of the playing field and which is transported by means of a conveyor belt or by a gradient into a ball collecting container.
  • the device according to US-A-4 456 252 suffers from the defect that the collecting arm is not on the net during training but in the middle of the field on the net. This is irritating, because the players often run up to the net and can not only concentrate on the ball, but also have to be careful not to get injured by the collecting arm.
  • each actuation of the collecting arm takes a relatively long time, because after collecting the balls, it must first be returned to its starting position on the network before the training can be started again.
  • the collecting arm cannot be moved at all, even if there is no person in the relevant half of the tennis court, because with this arrangement and direction of movement the collecting arm is unable to hold the balls falling between it and the net into the ball receiving channel at the end of the tennis court. It is not possible to lay a ball receiving channel under the net, and the balls pushed there by the collecting arm are also difficult to pick up.
  • a collecting arm which is movable in the longitudinal direction of the tennis court is not to be on the net during the training and therefore, according to US Pat. No. 4,606,543, has its starting position at the head end of the tennis court opposite the ball receiving groove, it must collect the balls over the entire length of the tennis court go there and back.
  • the interruption of the training therefore takes twice as long as with a device according to US-A-456 252.
  • the collecting arm must be so short that it can swipe through the post carrying the net, so that tennis balls lying outside the post on the side edges of the field cannot be collected.
  • the invention is therefore based on the object to provide a device of the type mentioned, which gathers the balls lying on a tennis court half in a short time in an area on the tennis court from which they can be easily picked up or transported.
  • the device should also be designed so that it can be accommodated on a tennis court without disrupting the game and can even perform its function during ongoing training.
  • the new facility is generally suitable for gathering balls on tennis courts so that they can be easily picked up from a point or a small area of the court. If necessary, another automatic device can serve this purpose. In a simple basic version, the device drives the balls together on one side of a space.
  • the device can be equipped with a collecting arm according to claim 22 with a smoothing element facing the floor, which is used for the automatic smoothing of the space surface, ie for the uniform distribution and, if necessary, compacting of coating particles.
  • the device according to claim 1 has the features that a collecting arm across the floor of the tennis court transverse to its longitudinal axis, i.e. the longitudinal axis of the collecting arm is movable, which is guided at one of its two ends in a running rail.
  • the collecting arm is arranged at right angles to the network of the tennis court in order to completely cover the half of the tennis court.
  • the running rail on which a carriage on which the collecting arm is attached, can be moved, is preferably arranged at a head end of the tennis court. There it enables the collecting arm to be moved at right angles to the tennis court network and least disturbs the play.
  • a plurality of drive wheels are preferably arranged offset in the direction of the longitudinal axis of the collecting arm.
  • the drive is very safe without any significant strain on the tennis court floor.
  • the drive wheels at least two in the direction of the longitudinal axis of the collecting arm offset switches, which are actuated in the end positions of the collecting arm.
  • the limit switches can be arranged outside the collecting arm, for example on the side walls which enclose the tennis court, so that they are actuated there by the collecting arm when the latter has completely moved to a side wall.
  • the control can preferably take place in such a way that the limit switches are assigned to the drive elements, which in each case move the collecting arm towards the relevant one of the limit switches.
  • a tennis court half is enclosed on at least three sides by a ball receiving groove, which connects to vertical boundaries, especially the walls around the tennis court, and to the net.
  • the function of the ball receiving channel is to provide a defined position of the collecting arm in its end positions and to allow the balls pushed by the collecting arm to roll onto a conveyor belt by means of an inclined surface.
  • the ball receiving channel is designed in such a way that it leaves no space in the adjacent collecting arm, in which tennis balls are not detected.
  • it is rounded in the corners in order to be adapted to a corresponding shape of the collecting arm in this area.
  • contact strips are arranged on the running rail according to claim 3, on which contacts attached to the collecting arm engage.
  • the new device can advantageously be supplemented by a ball collecting device which can be used in conjunction with a ball throwing machine and which sweeps over the half of the tennis court opposite the exerciser.
  • a ball collecting device which can be used in conjunction with a ball throwing machine and which sweeps over the half of the tennis court opposite the exerciser.
  • two copies of the described device can also cover a total of both tennis court halves. The latter arrangement is particularly recommended when playing with a trainer who uses a large number of balls.
  • the ball collecting device It is possible to operate the ball collecting device simultaneously while the ball throwing machine is in operation, so that no interruption of the training operation is required. In particular, higher ball delivery rates of the ball throwing machine are possible over a long time. Renting a ball machine can be economically attractive through the device for collecting the balls, which results in improved use of the ball throwing machine.
  • the device is characterized by simple operability, which is essentially limited to actuation of electrical switching elements, which can be combined in a control panel.
  • Essential parts of the device for collecting the balls can be made of plastic with little wear and with little manufacturing effort. This applies in particular to the ball receiving channel.
  • the collecting arm has a ball-repellent outer profile, and it is on the long sides of the playground which the collecting arm is movable, arranged flat ball receptacles. It is noted that the collecting arm has a ball-collecting function in connection with the ball receptacles, but that even without such channels the collecting arm as Can act smoothing, which evenly distributes a particulate court surface and also drives balls to one side of the playground, namely the long side of the playground to which it is moved.
  • the collecting arm is oriented transversely to the network of a tennis court and is moved along the network.
  • At least one flat, circumferential horizontal conveyor for the balls is arranged in the ball receiving groove.
  • this horizontal conveyor the balls that were driven into the ball receiving channel by the collecting arm can be collected in one place.
  • Variants of this horizontal conveyor which are particularly expedient are given below.
  • the ball receiving groove preferably has a flat slope on the side facing the collecting arm and the outer profile of the collecting arm is drawn in in a shape-like manner on its outside, ie it springs back so that the flat slope of the ball receiving groove can lie approximately in a form-fitting manner.
  • the tennis balls driven to the ball receiving channel are thus pushed securely into the ball receiving channel through the collecting arm.
  • the transport to a specific collecting point need not be carried out exclusively by the collecting arm. Rather, the collecting arm can be reset immediately if it has pushed the tennis balls driven onto one side of the tennis court into the ball receiving groove on this side.
  • the ball receiving channel has two endless belts which run flat next to one another, two mutually facing inner trims resting on the channel and two mutually facing outer trims being covered by the outer profile of the ball receiving channel.
  • the sections of the endless belt that are not required for the ball transport are thus protected.
  • the endless belts are designed in particular as round belts.
  • a particular advantage of this arrangement of the endless belts in one plane is that the ball receiving groove can be made flat and rises only slightly above the ground.
  • the round belts as endless belts enable a high ball transport speed with safe ball guidance.
  • the collecting arm has a smoothing element directed towards the floor, as shown in claim 22, which according to claim 23 is preferably pivotable about an axis lying parallel to the longitudinal axis of the collecting arm.
  • the pivotability means that when the collecting arm is moved, then stopping and reversing the direction of movement, no burr-shaped accumulations of the coating particles are formed or remain.
  • the pivoting position of the smoothing element is preferably motorized reversed so that the smoothing element forms a wedge-shaped gap with the bottom, which is open to the front in the direction of movement.
  • An overall device for collecting balls using the collecting arm with ball receptacles is according to claim 8 in that on a front side of the playground half between the longitudinal sides of the playground, to which the collecting arm can be moved, a further flat ball receiving groove is arranged, which is directed at the corners to arranged on the longitudinal sides of the playground is, and that a ball collector is arranged on the further ball receiving channel.
  • the other ball receiving channel is fed by both ball receiving channels on the long sides of the playground.
  • the direction of movement of the horizontal conveyor on the further ball receiving channel can either be switched depending on which ball receiving channel is delivering balls to it, or the horizontal conveyor of the further ball receiving channel can be divided in such a way that it always transports balls to the ball collector.
  • a short conveyor belt can be arranged diagonally between the abutting ball receptacles at the corners where the ball receivers meet.
  • the ball collector can be provided with a vertical conveyor - approximately - between the level of the ball receiving channel, which is also referred to as the conveyor channel, and a ball tube which can be pivoted above head height.
  • This ball tube which is fed from the ball collector, makes it practically possible for a trainer to be able to do so continuously is supplied with balls, which he can pass on to the player to be trained. It is therefore not necessary for the trainer to remove the balls from a ball container. The trainer's ball release frequency can thus be increased.
  • the balls emerging from the ball tube controlled individually or in a row, can be comfortably hit by the trainer, since the balls falling from the ball tube jump sufficiently high from the court.
  • the ball tube can be swiveled and can thus be swiveled forward to the impact line, for example.
  • a telescopically displaceable supply pipe can be arranged between the ball collector and a ball throwing machine - if not only to be played with the trainer. Due to the telescopic displaceability, the connection between the ball collector and the ball throwing machine is maintained when the ball throwing machine is positioned differently.
  • the ball throwing machine is designed with wheels or feet that can be raised and lowered automatically alternately at a distance from one another.
  • the position of the collecting arm with respect to the ball throwing machine, especially the wheels or feet is provided with sensors which control the raising and lowering of the feet so that the collecting arm can pass under the ball throwing machine while maintaining the position of the ball throwing machine.
  • the movement speed of the collecting arm can be reduced by a sensor when it passes under the ball throwing machine.
  • a particularly advantageous embodiment of the vertical conveyor in the ball collector consists in the vertical conveyor having two circulating belts with two upward running strands facing one another at a distance from the balls.
  • the vertical conveying speed can thus be increased considerably since the balls can follow one another directly. During transport, the balls are practically clamped between the mutually facing strands of the vertical conveyor.
  • a vertically adjustable ejector is preferably arranged in the upper region between the endless conveyors.
  • a lifting magnet is used in particular for vertical adjustment.
  • the balls are fed to the tube or the ball receiving device which is about to be activated.
  • the ball tube and / or the supply tube can be closed by a controlled flap. As described, this allows the removal of the balls from the ball tube to be individually controlled in the training mode.
  • the flap on the supply tube on the other hand, the operation of the ball throwing machine can be monitored and, in particular, made dependent on the payment of a fee - insertion of a coin.
  • the device can be developed in such a way that an outlet opening is guided to a deflection tube which can be pivoted with a lifting magnet and which optionally leads to a ball cage or a closed ball container.
  • This swiveling deflection tube thus represents an additional switch for the balls to be dispensed.
  • the balls can thus be collected, for example, in four stations, the ball tube, the ball throwing machine, a basket for the balls or a closed ball storage from which the balls are made cannot be removed easily.
  • a counter can be arranged at an outlet opening of the deflecting tube in order to control the balls which have been dispensed and used for playing or training. This counter can also be used to check the completeness of the balls.
  • each of these tubes is preferably connected to a weight bridge with a contact which is actuated by the weight of the supply tube or the ball tube when a predetermined number of balls in the pipe is exceeded.
  • the vertical conveyor is switched off in good time by actuating the contact.
  • an intermediate storage device is provided between the ball receiving channel and the vertical conveyor according to claim 19, with two auxiliary vertical conveyors extending upwards from the ball receiving channel and a horizontal conveyor belt, which to the Vertical conveyor leads. From the intermediate storage formed above the horizontal conveyor, the balls are automatically activated by the horizontal conveyor fed to the vertical conveyor of the ball collector.
  • the horizontal conveyor belonging to it consists of a conveyor belt running in two superimposed levels, which is guided laterally in a guide profile. Soiling of the central part of the ball receiving groove, in particular in ash places, is avoided, since any coating particles are transported to the deflection points of the horizontal conveyor and fall there. Furthermore, the horizontal conveyor on the side can hardly be dismantled or damaged by unauthorized persons, especially children.
  • the collecting arm can be moved along a guide rail which is arranged parallel to the network of the playing field and which consists of two mutually parallel profiles made of conductive material which enclose a gap in which an impeller is guided, the profiles being directed outwards fall flat and there is a pantograph on each guide rail that also serves as a current rail.
  • this guide rail can be designed so flat and rising a little above the ground that it does not form a dangerous tripping edge.
  • Figures 1 ff. Relate to embodiments of a collecting arm 133, which are provided for driving the tennis balls together on a court side and possibly for smoothing the court surface if it has a particulate covering, in particular an ash covering.
  • ball receptacles 137-138 are arranged along the - half - longitudinal sides of the playground and the front side according to FIG. 1. Such ball receptacles are shown in cross section in FIGS. 2 and 14.
  • a ball collector is arranged on and partially above the ball receiving channel 137, as shown in FIGS Figures 9 and 13 can be seen overall.
  • FIG. 1 an embodiment of the device is shown roughly schematically in FIG. 1, which has a collecting arm 133 which extends in an extension transverse to a net 133a on a ball receiving groove 137 is movable.
  • the collecting arm has motors arranged along its longitudinal extent, indicated with dots, but not provided with reference numerals, and associated contact switches, so that it can be moved against one of the ball receptacles 138, 139 until it lies evenly against it.
  • 1 further schematically indicates how a ball tube with a closable opening for delivering balls to a trainer is pivotably attached to a ball collector 157.
  • a supply pipe 159 which is telescopically expandable, leads to a ball-throwing machine 160.
  • the mobility of the supply pipe is indicated by two double arrows, not designated.
  • the ball collecting movement is marked by two angled arrows 137a, 137b.
  • FIG. 2 the shape of the profile of the ball receiving channel 137 is shown with associated broken guide part 135 for the collecting arm 133. Of the rollers of the collecting arm with which it rolls on the floor, only one roller 134 can be seen. The roller is driven by an electric motor just like the other rollers.
  • the ball receiving channel 137 has an external slope 137a, which serves to slide or roll tennis balls, eg 131, if corresponding ball receiving channels 138, 139 are arranged on the longitudinal sides of the playground.
  • the tennis balls roll to a central flat section 137b over inward slopes where they are transported in the longitudinal direction of the ball receptacles.
  • the central flat portion 137b can also be referred to as a bottom.
  • a horizontal conveyor is used to transport the balls over the floor.
  • it consists of two endless belts 138a, 139a arranged circumferentially next to each other.
  • the mutually facing strands of these endless belts lie on the floor 137b, while the respective other dummies move in cavities of the ball receiving channel, which are not marked.
  • the balls are well guided through the internal trumms and transported at high transport speeds.
  • rollers 148, 149 are mounted displaceably against springs 140, 141 in the collecting arm. If a person accidentally steps on the collecting arm, it will not be easily damaged due to the resilience of the springs.
  • the outer profile or a housing 133b is curved at the top so that the balls can roll off and undercut laterally to match the bevel 137a of the ball receiving groove.
  • the most protruding are limit switches 142, 143, which are wired to switch off the drives of the running wheels 134, 134a when the collecting arm hits one of the ball receptacles.
  • a brush 144 which is used to smooth the square surface by evenly distributing particulate coating, can be raised or lowered on one side in the direction of the double arrows 144a, 144b.
  • the adjustment of the brush 144 is carried out so that a wedge-shaped gap is formed which is open in the direction of movement of the collecting arm.
  • FIG. 4 shows a transition point between the two ball receiving grooves 137, 138 arranged at right angles to one another in the plan view, at which a small horizontal conveyor 150 is arranged diagonally. This horizontal conveyor facilitates the transition of the tennis balls from the ball receiving channel 138 to the ball receiving channel 137 and thus to the ball collector 157.
  • FIGS. 5-7 show how the collecting arm 133 moves under the ball throwing machine 160 when it is driven by the electric motor 147, see FIG. 3 and further electric motors in the direction of the arrows not shown in FIGS. 5-7.
  • Sensors or contact switches 161, 162 sense the position of the collecting arm 133.
  • the ball machine is on support wheels 165, 166, see Fig. 5.
  • the support wheels 163, 164 are lowered and the inner support wheels 165, 166 are tightened, see Fig. 6.
  • the collector arm 133 to below the sensor 162 is driven, the original configuration of the support wheels 163-166 is restored, see FIG. 7.
  • the overall structure of the ball collector 157 is shown in FIGS. 9 and 13.
  • the ball collector includes two small auxiliary vertical conveyors 187, 188, which receive balls conveyed in the direction of arrows 132, 132a and can enter them into a catch basin 189, where the balls are temporarily stored. There they are transported by a horizontal conveyor 190 to the foot of a vertical conveyor 173, which is shown in detail in FIG. 10. 10, however, the vertical conveyor is shown without the horizontal conveyor 190 being interposed above the ball receiving channel 137.
  • the vertical conveyor 173 consists essentially of two vertically arranged circumferential belts 165, 165a, which are arranged at such a distance from one another that a tennis ball 131 is held clamped between them.
  • the two circulating belts 165, 165a are held by deflection rollers 166-169, of which the lower deflection rollers 166, 167 also define the ball receiving opening of the vertical conveyor.
  • an ejector 170 is arranged which can be adjusted electromagnetically so that it can eject the balls clamped between the bands at an outlet opening 172 or at a lower opposite point, which cannot be seen in the section in FIG Ball exit opening is defined.
  • the adjustability of the ball ejector 170 with a lifting magnet 171 is indicated in FIG. 11, see double arrow, not shown.
  • the illustration in FIG. 11 is rotated by 90 ° with respect to that in FIG. 10.
  • the outlet opening 172 leads to a pipe 174a according to FIG. 11.
  • a deflection tube 174 can also be adjustable, specifically about a vertical axis with the lifting magnet 179, see FIG. 12. Depending on the setting of the deflection tube 174, the balls are transported into an outlet opening 181 to a closed ball storage 178 or to an open ball basket 177 , see also Figures 9 and 13.
  • FIG. 9 there is a further outlet opening to a supply pipe 159, which is guided telescopically to the ball throwing machine 160 and can be closed at its lower section by a flap 175, via an outlet opening to the deflection tube 134, which is not designated.
  • an outlet opening for the ball tube 158 in the area of the vertical conveyor which can be closed in a controlled manner by a flap 176 and is used for direct training operation.
  • a weight bridge 183 and 186 is arranged both on the ball tube 158 and on the supply tube 159, the structure of which is shown in detail in FIG. 8:
  • the weight bridge consists of a resiliently suspended part 183a with which contact switches 184, 185 can be actuated, which are connected in series. If both contact switches are closed by the weight of the balls 131, the drive of the vertical conveyor 173 can be switched off and no further balls are transported into the ball tube.
  • the weight bridge 186 is constructed in the same way and controls the ball supply to the supply pipe 159.
  • the ball machine 160 can be provided with a footboard which, in FIGS. 5-7, lies in the areas of the support rollers 163, 164, so that a person is not hindered when the collecting arm is passed through when standing on it.
  • attachment points for the contact switches accommodated in the collecting arm 133 are designated by 197-202, in order to ensure a uniform contact of the collecting arm with the relevant ball receptacles.
  • the collecting arm is guided in a guide rail 193 parallel to a network 133a.
  • the structure of the guide rail 193 results in detail from Fig. 16.
  • the guide rail consists of two profiles 194, 195, which are asymmetrically shaped roof-shaped and form a gap or channel between their shorter, steeply falling parts, in which an impeller 203 of the collecting arm is guided laterally is.
  • Sliding contacts 204, 205 which are electrically insulated from one another and are used to supply current to the drive motors accommodated in the collecting arm, are also attached to the collecting arm.
  • the profiles 194, 195 are made of electrically conductive material - metal - and thus also serve as a busbar.
  • the configuration of the ball receiving channel shown in FIG. 14 is not only suitable for receiving the ball, but also for guiding the collecting arm with the guide profile 192, specifically with the right inverted U-shaped part in FIG. 14. If the ball receiving channel is to be used for guiding, it is mounted with the inverted U-shaped part facing the playing field. If, on the other hand, the ball receiving channel is to be used for collecting balls, it is fixed with the flattened part facing the playing field. A profile is therefore advantageously sufficient for performing two different functions.
  • a double-sided adhesive tape 193 is used to fix the ball receiving channel, so that the floor is not damaged as is otherwise the case when dowels are attached. This fixation can also be done quickly and easily.

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Description

Die Erfindung betrifft eine Einrichtung zum Sammeln von Tennisbällen mit einem quer zu seiner Längsachse über den Boden eines Tennisplatzes mit Netz verfahrbaren Sammelarm.The invention relates to a device for collecting tennis balls with a collecting arm which can be moved transversely to its longitudinal axis over the floor of a tennis court with a net.

Wenn beim Tennisspielen für Trainingszwecke eine Vielzahl von Bällen eingesetzt wird, stellt der Vorgang des Einsammelns der Bälle eine Unterbrechung des Spiel- und Trainingsvorgangs dar, der aus vielen Gründen unerwünscht sein kann. Insbesondere, wenn zum Training eines oder mehrerer Tennisspieler eine Ballwurfmaschine eingesetzt wird, die in verhältnismäßig kurzer Zeit eine Vielzahl von Bällen abgibt, dauert der Vorgang des Ballsammelns im Verhältnis zur effektiven Trainingszeit verhältnismäßig lange und erhöht so den relativen Aufwand für das Training, vor allem wenn die Ballwurfmaschine und/oder der Platz pro Zeiteinheit, insbesondere stundenweise, gemietet wird. Abgesehen davon ist der Vorgang des Ballsammelns unbeliebt, weil er ansich keine sportlich Betätigung darstellt.When a plurality of balls are used in tennis for training purposes, the ball collection process is an interruption in the game and training process, which can be undesirable for many reasons. In particular, if a ball-throwing machine is used to train one or more tennis players, which delivers a large number of balls in a relatively short time, the ball-collecting process takes a relatively long time in relation to the effective training time and thus increases the relative effort for the training, especially if the ball throwing machine and / or the space is rented per unit of time, in particular by the hour. Apart from that, the ball-picking process is unpopular because it is not itself a sporting activity.

Es sind daher bereits Ballsammeleinrichtungen mit einem verfahrbaren Sammelarm bekannt, die das Einsammeln der Tennisbälle erleichtern sollen. Bei einer ersten bekannten Ausführung gemäß DE-A-32 42 358 erstreckt sich der Sammelarm in der Ausgangstellung längs des seitlichen Spielfeldrands und ist zum Einsammeln der auf dem Spielfeld liegenden Bälle um etwa 90° in eine sich längs des hinteren Spielfeldrands ersteckende Stellung verschwenkbar. Der grundsätzliche Nachteile dieser Konstruktion besteht darin, daß ein verschwenkbarer Sammelarm nicht die gesamte Fläche einer Spielplatzhälfte und der Randbereiche überstreichen kann.Ball collecting devices with a movable collecting arm are therefore already known, which are intended to facilitate the collection of the tennis balls. In a first known embodiment according to DE-A-32 42 358, the collecting arm extends in the starting position along the side edge of the field and can be pivoted by about 90 ° into a position extending along the rear edge of the field to collect the balls lying on the field. The basic disadvantages of this construction is that a pivotable collecting arm cannot cover the entire area of one half of the playground and the edge areas.

Bei einer weiteren bekannten Sammeleinrichtung gemäß US-A- 4456252 und US-A- 4606543 ist ein Sammelarm vorgeshen, der sich parallel zum Netz erstreckt, etwa ebenso lang ist wie dieses und zum Einsammeln der Bälle in Längsrichtung des Spielplatzes zu dessen hinteren Rand verfahrbar ist. Dort schiebt der Sammelarm die Bälle auf eine sich längs des hinteren Spielfeldrands erstreckende Ballaufnahmerinne, die sie mittels eines Förderbands oder durch Gefälle in einen Ballsammelbehälter transportiert.In another known collecting device according to US-A-4456252 and US-A-4606543, a collecting arm is provided which extends parallel to the net, is approximately as long as it is and can be moved in the longitudinal direction of the playground to the rear edge thereof for collecting the balls. There, the collecting arm pushes the balls onto a ball receiving channel which extends along the rear edge of the playing field and which is transported by means of a conveyor belt or by a gradient into a ball collecting container.

Die Einrichtung gemäß US-A- 4 456 252 leidet unter dem Mangel, daß der Sammelarm während des Trainings nicht am Spielfeldrand,sondern mitten auf dem Spielfeld am Netz steht. Das irritiert, denn die Spieler laufen oft bis zum Netz vor und können sich dann nicht ausschließlich auf den Ball konzentrieren, sondern müssen auch noch darauf achten, sich nicht durch den Sammelarm zu verletzen. Außerdem dauert jede Betätigung des Sammelarms verhältnismäßig lange, weil er nach dem Sammeln der Bälle jedesmal erst wieder in seine Ausgangsstellung am Netz zurückgefahren sein muß, bevor das Training wieder aufgenommen werden kann. Während des Übens kann der Sammelarm überhaupt nicht verfahren werden, selbst dann nicht wenn sich in der betreffenden Hälfte des Tennisplatzes keine Person befindet, denn der Sammelarm ist bei dieser Anordnung und Bewegungsrichtung nicht in der Lage, die zwischen ihm und dem Netz zu Boden fallenden Bälle in die Ballaufnahmerinne am Ende des Tennisplatzes zu befördern. Unter dem Netz kann man keine Ballaufnahmerinne anlegen, und die vom Sammelarm dorthin geschobenen Bälle lassen sich auch schlecht auflesen.The device according to US-A-4 456 252 suffers from the defect that the collecting arm is not on the net during training but in the middle of the field on the net. This is irritating, because the players often run up to the net and can not only concentrate on the ball, but also have to be careful not to get injured by the collecting arm. In addition, each actuation of the collecting arm takes a relatively long time, because after collecting the balls, it must first be returned to its starting position on the network before the training can be started again. During practice, the collecting arm cannot be moved at all, even if there is no person in the relevant half of the tennis court, because with this arrangement and direction of movement the collecting arm is unable to hold the balls falling between it and the net into the ball receiving channel at the end of the tennis court. It is not possible to lay a ball receiving channel under the net, and the balls pushed there by the collecting arm are also difficult to pick up.

Wenn ein in Längsrichtung des Tennisplatzes verfahrbarer Sammelarm während des Trainings nicht am Netz stehen soll und deshalb gemäß US-A- 4 606 543 seine Ausgangsstellung an dem der Ballaufnahmerinne gegenüberliegenden Kopfende des Tennisplatzes hat, muß er beim Einsammelm der Bälle über die ganze Länge des Tennisplatzes hin und zurück verfahren. Die Unterbrechung des Trainings dauert deshalb sogar doppelt so lange wie bei einer Einrichtung gemäß US-A- 456 252. Außerdem muß der Sammelarm so kurz sein, daß er swischen den das Netz tragenden Pfosten hindurchfahren kann, so daß an den seitlichen Spielfeldrändern außerhalb der Pfosten liegende Tennisbälle nicht eingesammelt werden können.If a collecting arm which is movable in the longitudinal direction of the tennis court is not to be on the net during the training and therefore, according to US Pat. No. 4,606,543, has its starting position at the head end of the tennis court opposite the ball receiving groove, it must collect the balls over the entire length of the tennis court go there and back. The interruption of the training therefore takes twice as long as with a device according to US-A-456 252. In addition, the collecting arm must be so short that it can swipe through the post carrying the net, so that tennis balls lying outside the post on the side edges of the field cannot be collected.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Einrichtung der eingangs gennanten Art zu schaffen, welche die auf einer Tennisplatshälfte liegenden Bälle in kurzer Zeit in einem Bereich auf dem Tennisplatz zusammentreibt, von dem sie einfach aufgenommen oder weitertransportiert werden können. Die Einrichtung soll darüber hinaus so ausgebildet sein, daß sie auf einem Tennisplatz untergebracht werden kann, ohne den Spielbetrieb zu stören und sogar während des laufenden Trainings ihre Funktion zu erfüllen vermag.The invention is therefore based on the object to provide a device of the type mentioned, which gathers the balls lying on a tennis court half in a short time in an area on the tennis court from which they can be easily picked up or transported. The device should also be designed so that it can be accommodated on a tennis court without disrupting the game and can even perform its function during ongoing training.

Diese Aufgabe wird durch die Ausbildung der Einrichtung mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1 gelöst.This object is achieved by the design of the device with the features of the characterizing part of claim 1.

Die neue Einrichtung eignet sich ganz allgemein, um auf Tennisplätzen Bälle zusammenzutreiben, damit diese von einer Stelle bzw. einem kleinen Bereich des Platzes bequem aufgelesen werden können. Dazu kann ggf. eine weitere selbsttätige Einrichtung dienen. In einer einfachen Grundversion treibt die Einrichtung die Bälle auf einer Seite einer Platzhälfte zusammen.The new facility is generally suitable for gathering balls on tennis courts so that they can be easily picked up from a point or a small area of the court. If necessary, another automatic device can serve this purpose. In a simple basic version, the device drives the balls together on one side of a space.

Die Einrichtung kann mit einem Sammelarm gemäß Anspruch 22 mit einem zum Boden weisenden Glättelement ausgerüstet sein, das zum selbsttätigen Glätten der Platzorberfläche, d. h. zum gleichmäßigen Verteilen und ggf. Verdichten von Belagpartikeln dient.The device can be equipped with a collecting arm according to claim 22 with a smoothing element facing the floor, which is used for the automatic smoothing of the space surface, ie for the uniform distribution and, if necessary, compacting of coating particles.

Im einzelnen weist die Einrichtung gemäß Anspruch 1 die Merkmale auf, daß ein Sammelarm über den Boden des Tennisplatzes quer zu seiner Längsachse, d.h. der Längsachse des Sammelarms, verfahrbar ist, der an einem seiner beiden Enden in einer Laufschiene geführt ist. Dabei ist der Sammelarm zum vollständigen Überstreichen der Tennisplatzhälfte rechtwinklig zum Netz des Tennisplatzes angeordnet.In particular, the device according to claim 1 has the features that a collecting arm across the floor of the tennis court transverse to its longitudinal axis, i.e. the longitudinal axis of the collecting arm is movable, which is guided at one of its two ends in a running rail. The collecting arm is arranged at right angles to the network of the tennis court in order to completely cover the half of the tennis court.

Die Laufschiene, auf der ein Laufwagen,an welcher der Sammelarm angebracht ist, verfahrbar ist, wird bevorzugt an einem Kopfende des Tennisplatzes angeordnet. Dort ermöglicht sie die Verfahrbarkeit des Sammelarms rechtwinklig zum Netz des Tennisplatzes und stört am wenigsten den Spielbetrieb.The running rail, on which a carriage on which the collecting arm is attached, can be moved, is preferably arranged at a head end of the tennis court. There it enables the collecting arm to be moved at right angles to the tennis court network and least disturbs the play.

Zum Verfahren des Sammelarms sind in diesem nach Anspruch 10 bevorzugt mehrere Antriebsräder in Richtung der Längsachse des Sammelarms versetzt angeordnet. Der Antrieb erfolgt damit sehr sicher ohne nennenswerte Belastung des Tennisplatzbodens.To move the collecting arm, a plurality of drive wheels are preferably arranged offset in the direction of the longitudinal axis of the collecting arm. The drive is very safe without any significant strain on the tennis court floor.

Hierzu trägt auch bei, daß die Antriebsräder bevorzugt gemäß Anspruch 11 gefedert an dem Sammelarm angebracht sind.This also contributes to the fact that the drive wheels are preferably spring-mounted on the collecting arm.

Weiterhin dienen nach Anspruch 12 zur Steuerung der Antriebsräder mindestens zwei in Richtung der Längsachse des Sammelarms gegeneinander versetzte Endschalter, die in den Endstellungen des Sammelarms, betätigbar sind. Die Endschalter können außerhalb des Sammelarms, beispielsweise an den seitlichen Wänden, die den Tennisplatz einschließen, angeordnet sein, damit sie dort durch den Sammelarm betätigt werden, wenn dieser vollständig an eine seitliche Wand gefahren ist. Die Steuerung kann dabei bevorzugt so erfolgen, daß die Endschalter den Antriebselementen zugeordnet sind, die jeweils den Sammelarm auf den betreffenden der Endschalter zubewegen. Damit ist es möglich, daß auch bei ungleichmäßigem Verfahren des Sammelarms die Antriebsräder oder das Antriebsrad weiterläuft, bis der betreffende Teil des Sammelarms an den Endschalter stößt, wenn auch zuvor ein anderer Teil des Sammelarms bereits an andere Endschalter gestoßen ist und damit die zugehörigen Antriebsräder abgeschaltet hat. Durch diese gezielte fortdauernde Aktivierung der Antriebsräder, die zu einer vollständigen Anlage des Sammelarms an einer seitlichen Wand, die den Platz begrenzt,bzw. einer davor angeordneten Führungsleiste, dient, werden die Antriebselemente und der Belag des Tennisplatzes geschont, da die Antriebsräder, die keine weitere Bewegung des anliegenden Sammelarmabschnitts hervorrufen können, nicht weiterdrehen.Furthermore, according to claim 12 serve to control the drive wheels at least two in the direction of the longitudinal axis of the collecting arm offset switches, which are actuated in the end positions of the collecting arm. The limit switches can be arranged outside the collecting arm, for example on the side walls which enclose the tennis court, so that they are actuated there by the collecting arm when the latter has completely moved to a side wall. The control can preferably take place in such a way that the limit switches are assigned to the drive elements, which in each case move the collecting arm towards the relevant one of the limit switches. This makes it possible for the drive wheels or the drive wheel to continue to run even when the collecting arm moves unevenly until the relevant part of the collecting arm hits the limit switch, even if another part of the collecting arm has already encountered other limit switches and so that the associated drive wheels have switched off. Through this targeted continuous activation of the drive wheels, which leads to a complete contact of the collecting arm on a side wall that limits the space or. A guide bar arranged in front serves to protect the drive elements and the surface of the tennis court, since the drive wheels, which cannot cause any further movement of the adjacent collecting arm section, do not turn any further.

Bevorzugt wird nach Anspruch 8 eine Tennisplatzhälfte, auf wenigstens drei Seiten von einer Ballaufnahmerinne eingeschlossen, welche an vertikale Begrenzungen, speziell die Wände um den Tennisplatz, sowie an das Netz anschließt. Die Ballaufnahmerinne hat die Funktion, eine definierte Anlage des Sammelarms in dessen Endstellungen zu ergeben und durch eine geneigte Oberfläche die durch den Sammelarm aufgeschobenen Bälle auf ein Förderband rollen zu lassen.Preferably, according to claim 8, a tennis court half is enclosed on at least three sides by a ball receiving groove, which connects to vertical boundaries, especially the walls around the tennis court, and to the net. The function of the ball receiving channel is to provide a defined position of the collecting arm in its end positions and to allow the balls pushed by the collecting arm to roll onto a conveyor belt by means of an inclined surface.

Die Ballaufnahmerinne ist im einzelnen so ausgebildet, daß sie bei anliegendem Sammelarm keinen Zwischenraum freiläßt, in dem Tennisbälle nicht erfaßt werden. Insbesondere ist sie in den Ecken gerundet, um einer entsprechenden Formgebung des Sammelarms in diesem Bereich angepaßt zu sein.The ball receiving channel is designed in such a way that it leaves no space in the adjacent collecting arm, in which tennis balls are not detected. In particular, it is rounded in the corners in order to be adapted to a corresponding shape of the collecting arm in this area.

Zur Stromversorgung der in dem Sammelarm angeordneten elektrischen Elemente, insbesondere der Antriebselemente der Antriebsräder sowie gegebenenfalls eines Vertikalförderers an der am Ende des Tennisplatzes angeordneten Ballaufnahmerinne sind nach Anspruch 3 an der Laufschiene verdeckt Kontaktleisten angeordnet, an denen am Sammelarm angebrachte Kontakte angreifen.To supply power to the electrical elements arranged in the collecting arm, in particular the drive elements of the drive wheels and possibly a vertical conveyor on the ball receiving groove arranged at the end of the tennis court, contact strips are arranged on the running rail according to claim 3, on which contacts attached to the collecting arm engage.

Die neue Einrichtung kann durch eine Ballsammeleinrichtung vorteilhaft ergänzt werden, die in Verbindung mit einer Ballwurfmaschine eingesetzt werden kann und die dem Trainierenden gegenüberliegende Tennisplatzhälfte überstreicht. Es können aber auch zwei Exemplare der beschriebenen Einrichtung insgesamt beide Tennisplatzhälften überstreichen. Die letztgenannte Anordnung empfiehlt sich besonders dann, wenn mit einem Trainer gespielt wird, der eine große Anzahl von Bällen benutzt.The new device can advantageously be supplemented by a ball collecting device which can be used in conjunction with a ball throwing machine and which sweeps over the half of the tennis court opposite the exerciser. However, two copies of the described device can also cover a total of both tennis court halves. The latter arrangement is particularly recommended when playing with a trainer who uses a large number of balls.

Es ist möglich, die Ballsammeleinrichtung gleichzeitig während des Betriebs der Ballwurfmaschine zu betreiben, so daß keine Unterbrechung des Trainingsbetriebs erforderlich ist. Damit sind insbesondere höhere Ballabgaberaten der Ballwurfmaschine über eine lange Zeit möglich. Wirtschaftlich kann die Mietung einer Ballmaschine durch die Einrichtung zum Sammeln der Bälle attraktiv werden, woraus eine verbesserte Nutzung der Ballwurfmaschine resultiert. Schließlich zeichnet sich die Einrichtung durch eine einfache Bedienbarkeit aus, die sich im wesentlichen auf eine Betätigung elektrischer Schaltelemente beschränkt, die in einem Bedienungspult zusammengefaßt sein können.It is possible to operate the ball collecting device simultaneously while the ball throwing machine is in operation, so that no interruption of the training operation is required. In particular, higher ball delivery rates of the ball throwing machine are possible over a long time. Renting a ball machine can be economically attractive through the device for collecting the balls, which results in improved use of the ball throwing machine. Finally, the device is characterized by simple operability, which is essentially limited to actuation of electrical switching elements, which can be combined in a control panel.

Wesentliche Teile der Einrichtung zum Sammeln der Bälle können aus Kunststoff verschleißarm und mit geringem Herstellungsaufwand gefertigt werden. Dies betrifft insbesondere die Ballaufnahmerinne.Essential parts of the device for collecting the balls can be made of plastic with little wear and with little manufacturing effort. This applies in particular to the ball receiving channel.

Bei einer bevorzugten Variante der Einrichtung, die sich sowohl zum Sammeln von Bällen als auch mit geeigneter Ergänzung zum Glätten des Tennisplatzes eignet, wenn dieser mit einem partikelförmigen Belag versehen ist, hat der Sammelarm ein Bälle abweisendes Außenprofil, und es sind an den Spielplatzlängsseiten, zu denen der Sammelarm fahrbar ist, flache Ballaufnahmerinnen angeordnet. Es wird bemerkt, daß der Sammelarm eine ballsammelnde Funktion im Zusammenhang mit den Ballaufnahmerinnen hat, daß aber auch ohne solche Rinnen der Sammelarm als Glättungsarm wirken kann, der einen partikelförmigen Platzbelag gleichmäßig verteilt und außerdem Bälle zu einer Spielplatzseite, nämlich der Spielplatzlängsseite, zu der er bewegt wird, treibt. Der Sammelarm ist dabei quer zu dem Netz eines Tennisplatzes orientiert und wird längs des Netzes verfahren. Ein Vorteil dieser Variante der Einrichtung besteht darin, daß beide Hälften eines Tennisplatzes sowohl für Trainer als auch für Spielbetrieb ohne Störung der Spieler bzw. des Trainers genutzt werden können. Ein Trainingsbetrieb ist mit einer Ballwurfmaschine ohne weiteres möglich.In a preferred variant of the device, which is suitable both for collecting balls and with a suitable addition for smoothing the tennis court, if this is provided with a particulate covering, the collecting arm has a ball-repellent outer profile, and it is on the long sides of the playground which the collecting arm is movable, arranged flat ball receptacles. It is noted that the collecting arm has a ball-collecting function in connection with the ball receptacles, but that even without such channels the collecting arm as Can act smoothing, which evenly distributes a particulate court surface and also drives balls to one side of the playground, namely the long side of the playground to which it is moved. The collecting arm is oriented transversely to the network of a tennis court and is moved along the network. An advantage of this variant of the device is that both halves of a tennis court can be used both for coaches and for playing without disturbing the players or the coach. A training operation is easily possible with a ball throwing machine.

In Weiterbildung der letztgenannten Einrichtung ist nach Anspruch 5 in der Ballaufnahmerinne wenigstens ein flacher umlaufender Horizontalförderer für die Bälle angeordnet. Mit diesem Horizontalförderer können die Bälle, die durch den Sammelarm in die Ballaufnahmerinne getrieben wurden, an einer Stelle gesammelt werden. Es werden weiter unten Varianten dieses Horizontalförderers angegeben, die besonders zweckmäßig sind.In a further development of the latter device, at least one flat, circumferential horizontal conveyor for the balls is arranged in the ball receiving groove. With this horizontal conveyor, the balls that were driven into the ball receiving channel by the collecting arm can be collected in one place. Variants of this horizontal conveyor which are particularly expedient are given below.

Zur leichten Aufnahme der Bälle weist vorzugsweise die Ballaufnahmerinne auf der dem Sammelarm zugewandten Seite eine flache Schräge auf und das Außenprofil des Sammelarms ist auf seiner Außenseite formähnlich eingezogen, d.h. es springt so zurück, daß die flache Schräge der Ballaufnahmerinne annähernd formschlüssig anliegen kann. Damit werden die zu der Ballaufnahmerinne getriebenen Tennisbälle sicher durch den Sammelarm in die Ballaufnahmerinne hineingeschoben.For easy reception of the balls, the ball receiving groove preferably has a flat slope on the side facing the collecting arm and the outer profile of the collecting arm is drawn in in a shape-like manner on its outside, ie it springs back so that the flat slope of the ball receiving groove can lie approximately in a form-fitting manner. The tennis balls driven to the ball receiving channel are thus pushed securely into the ball receiving channel through the collecting arm.

Indem die Ballaufnahmerinne jeweils mit einem Horizontalförderer für die Bälle ausgestattet ist, braucht der Transport zu einer konkreten Sammelstelle nicht ausschließlich durch den Sammelarm zu erfolgen. Vielmehr kann der Sammelarm sofort zurückgestellt werden, wenn er die auf eine Seite des Tennisplatzes zusammengetriebenen Tennisbälle in die Ballaufnahmerinne auf dieser Seite geschoben hat.Since the ball receiving channel is equipped with a horizontal conveyor for the balls, the transport to a specific collecting point need not be carried out exclusively by the collecting arm. Rather, the collecting arm can be reset immediately if it has pushed the tennis balls driven onto one side of the tennis court into the ball receiving groove on this side.

In einer zweckmäßigen Ausführungsform des Horizontalförderers, die vor allem herstellungsgünstig ist, hat die Ballaufnahmerinne zwei flach nebeneinander umlaufende Endlosriemen, wobei zwei einander zugewandt innenliegende Trumms auf der Rinne aufliegen und zwei einander abgewandt außenliegende Trumms von dem Außenprofil der Ballaufnahmerinne abgedeckt sind. Es liegen somit die für den Balltransport nicht benötigten Abschnitte der Endlosriemen geschützt. Zum Balltransport brauchen nur zwei verhältnismäßig massearme, d.h. leichte Endlosriemen bewegt und geführt zu werden. Zum reibungsarmen Transport sind die Endlosriemen insbesondere als Rundriemen ausgebildet. Ein besonderer Vorteil bei dieser Anordnung der Endlosriemen in einer Ebene besteht darin, daß die Ballaufnahmerinne flach ausgebildet sein kann und sich nur wenig über den Boden erhebt. Weiterhin ermöglichen die Rundriemen als Endlosriemen eine hohe Balltransportgeschwindigkeit bei sicherer Führung der Bälle.In an expedient embodiment of the horizontal conveyor, which is particularly advantageous in terms of manufacture, the ball receiving channel has two endless belts which run flat next to one another, two mutually facing inner trims resting on the channel and two mutually facing outer trims being covered by the outer profile of the ball receiving channel. The sections of the endless belt that are not required for the ball transport are thus protected. To transport the ball, only two need relatively low mass, i.e. light endless belts to be moved and guided. For low-friction transport, the endless belts are designed in particular as round belts. A particular advantage of this arrangement of the endless belts in one plane is that the ball receiving groove can be made flat and rises only slightly above the ground. Furthermore, the round belts as endless belts enable a high ball transport speed with safe ball guidance.

Zur Ausübung der Glättfunktion weist der Sammelarm ein zum Boden gerichtetes Glättelement auf, wie in Anspruch 22 dargestellt, welches entsprechend Anspruch 23 bevorzugt um eine parallel zu der Längsachse des Sammelarms liegende Achse schwenkbar ist. Durch die Schwenkbarkeit wird erreicht, daß beim Verfahren des Sammelarms, anschließendem Stoppen und Umkehren der Bewegungsrichtung keine gratförmigen Ansammlungen der Belagpartikel gebildet werden bzw. stehenbleiben. Hierzu wird die Schwenklage des Glättelements bevorzugt motorisch so umgesteuert, daß das Glättelement mit dem Boden einen keilförmigen Spalt bildet, der nach vorne in Bewegungsrichtung geöffnet ist.To perform the smoothing function, the collecting arm has a smoothing element directed towards the floor, as shown in claim 22, which according to claim 23 is preferably pivotable about an axis lying parallel to the longitudinal axis of the collecting arm. The pivotability means that when the collecting arm is moved, then stopping and reversing the direction of movement, no burr-shaped accumulations of the coating particles are formed or remain. For this purpose, the pivoting position of the smoothing element is preferably motorized reversed so that the smoothing element forms a wedge-shaped gap with the bottom, which is open to the front in the direction of movement.

Eine Gesamteinrichtung zum Ballsammeln unter Verwendung des Sammelarms mit Ballaufnahmerinnen besteht nach Anspruch 8 darin, daß an einer Stirnseite der Spielplatzhälfte zwischen Spielplatzlängsseiten, zu denen der Sammelarm fahrbar ist, eine weitere flache Ballaufnahmerinne angeordnet ist, die an den Ecken auf an den Spielplatzlängsseiten angeordneten Ballaufnahmerinnen gerichtet ist, und daß an der weiteren Ballaufnahmerinne ein Ballsammler angeordnet ist. Dabei wird die weitere Ballaufnahmerinne von beiden Ballaufnahmerinnen an den Spielplatzlängsseiten gespeist. Die Bewegungsrichtung des Horizontalförderers auf der weiteren Ballaufnahmerinne kann entweder umgeschaltet werden je nachdem, welche Ballaufnahmerinne auf ihn Bälle abgibt, oder aber der Horizontalförderer der weiteren Ballaufnahmerinne kann so geteilt werden, daß er in jedem Fall Bälle zu dem Ballsammler transportiert.An overall device for collecting balls using the collecting arm with ball receptacles is according to claim 8 in that on a front side of the playground half between the longitudinal sides of the playground, to which the collecting arm can be moved, a further flat ball receiving groove is arranged, which is directed at the corners to arranged on the longitudinal sides of the playground is, and that a ball collector is arranged on the further ball receiving channel. The other ball receiving channel is fed by both ball receiving channels on the long sides of the playground. The direction of movement of the horizontal conveyor on the further ball receiving channel can either be switched depending on which ball receiving channel is delivering balls to it, or the horizontal conveyor of the further ball receiving channel can be divided in such a way that it always transports balls to the ball collector.

Zur raschen und sicheren Übergabe der Bälle von den an den Spielplatzlängsseiten angeordneten Ballaufnahmerinnen in die weitere Ballaufnahmerinne, die mit dem Ballsammler zusammenwirkt, kann an den Ecken, an denen die Ballaufnahmerinnen aufeinanderstoßen, je ein kurzes Transportband diagonal zwischen den aufeinanderstoßenden Ballaufnahmerinnen angeordnet sein.For quick and safe transfer of the balls from the ball receptacles arranged on the long sides of the playground into the further ball receptacle, which cooperates with the ball collector, a short conveyor belt can be arranged diagonally between the abutting ball receptacles at the corners where the ball receivers meet.

Weiterhin kann der Ballsammler mit einem Vertikalförderer - annähernd - zwischen dem Niveau der Ballaufnahmerinne, die auch als Förderrinne bezeichnet wird, und einem über Kopfhöhe schwenkbaren Ballrohr versehen sein. Dieses Ballrohr, welches aus dem Ballsammler gespeist wird, ermöglicht es praktisch ohne Behinderung eines Trainers, daß dieser fortlaufend mit Bällen versorgt wird, welche er dem zu trainierenden Spieler zuspielen kann. Es ist also nicht erforderlich, daß der Trainer die Bälle umständlich einem Ballbehälter entnimmt. Die Ballabgabefrequenz des Trainers kann damit gesteigert werden. Außerdem entfällt eine Behinderung des Trainers durch einen auf dem Spielplatz stehenden Behälter. Dies ist besonders vorteilhaft, wenn ein Ballwechsel mit dem trainierten Spieler erfolgen soll. Im einzelnen können die aus dem Ballrohr gesteuert einzeln oder in Reihe austretenden Bälle von dem Trainer bequem geschlagen werden, da die aus dem Ballrohr fallenden Bälle von dem Platz genügend hoch springen. Das Ballrohr ist schwenkbar und kann so beispielsweise zu der Aufschlaglinie vorgeschwenkt werden.Furthermore, the ball collector can be provided with a vertical conveyor - approximately - between the level of the ball receiving channel, which is also referred to as the conveyor channel, and a ball tube which can be pivoted above head height. This ball tube, which is fed from the ball collector, makes it practically possible for a trainer to be able to do so continuously is supplied with balls, which he can pass on to the player to be trained. It is therefore not necessary for the trainer to remove the balls from a ball container. The trainer's ball release frequency can thus be increased. In addition, there is no handicap for the coach due to a container standing on the playground. This is particularly advantageous if the ball is to be exchanged with the trained player. In particular, the balls emerging from the ball tube, controlled individually or in a row, can be comfortably hit by the trainer, since the balls falling from the ball tube jump sufficiently high from the court. The ball tube can be swiveled and can thus be swiveled forward to the impact line, for example.

Weiterhin kann zwischen dem Ballsammler und einer Ballwurfmaschine - wenn nicht ausschließlich mit dem Trainer gespielt werden soll - ein teleskopisch verschiebbares Versorgungsrohr angeordnet sein. Durch die teleskopische Verschiebbarkeit bleibt die Verbindung zwischen Ballsammler und Ballwurfmaschine bei unterschiedlicher Positionierung der Ballwurfmaschine erhalten.Furthermore, a telescopically displaceable supply pipe can be arranged between the ball collector and a ball throwing machine - if not only to be played with the trainer. Due to the telescopic displaceability, the connection between the ball collector and the ball throwing machine is maintained when the ball throwing machine is positioned differently.

Damit durch die Ballwurfmaschine nicht das Überstreichen der Spielplatzhälfte mit einem Sammelarm behindert wird, ist die Ballwurfmaschine gemäß Anspruch 13 mit im Abstand zueinander selbsttätig wechselweise heb- und senkbaren Rädern oder Füßen ausgebildet. Außerdem sind die Position des Sammelarms bezüglich der Ballwurfmaschine, speziell der Räder oder Füße, abtastende Sensoren vorgesehen, welche das Heben und Senken der Füße so steuern, daß der Sammelarm unter der Ballwurfmaschine unter Aufrechterhaltung der Position der Ballwurfmaschine durchfahren kann. Außerdem kann durch einen Sensor die Bewegungsgeschwindigkeit des Sammelarms reduziert werden, wenn er unter der Ballwurfmaschine durchfährt.So that the ball throwing machine does not hinder the sweeping of the playground half with a collecting arm, the ball throwing machine is designed with wheels or feet that can be raised and lowered automatically alternately at a distance from one another. In addition, the position of the collecting arm with respect to the ball throwing machine, especially the wheels or feet, is provided with sensors which control the raising and lowering of the feet so that the collecting arm can pass under the ball throwing machine while maintaining the position of the ball throwing machine. In addition, the movement speed of the collecting arm can be reduced by a sensor when it passes under the ball throwing machine.

Eine besonders vorteilhafte Ausführungsform des Vertikalförderers in dem Ballsammler besteht darin, daß der Vertikalförderer zwei umlaufende Bänder mit zwei im Abstand der Bälle zueinander zugewandten nach oben laufenden Trumms hat. Damit kann die Vertikalfördergeschwindigkeit wesentlich erhöht werden, da die Bälle unmittelbar aufeinander folgen können. Die Bälle sind während des Transports praktisch zwischen den zueinander weisenden Trumms des Vertikalförderers eingeklemmt.A particularly advantageous embodiment of the vertical conveyor in the ball collector consists in the vertical conveyor having two circulating belts with two upward running strands facing one another at a distance from the balls. The vertical conveying speed can thus be increased considerably since the balls can follow one another directly. During transport, the balls are practically clamped between the mutually facing strands of the vertical conveyor.

Um die Bälle weiter sicher zwischen den zugewandten Trumms des Vertikalförderers zu halten, können diese mit einem Haftbelag versehen, insbesondere gummiert sein.In order to keep the balls securely between the facing strands of the vertical conveyor, they can be provided with an adhesive coating, in particular rubberized.

Damit die Bälle nach dem Vertikalfördervorgang an vertikal zueinander versetzten Ausgabeöffnungen, die zu dem Ballrohr bzw. dem Versorgungsrohr oder weiteren Ballaufnahmeeinrichtungen führen, gelöst werden können, ist vorzugsweise in dem oberen Bereich zwischen den Endlosförderern ein vertikal verstellbarer Auswerfer angeordnet.So that the balls can be released after the vertical conveying process at vertically offset dispensing openings that lead to the ball tube or the supply tube or further ball receiving devices, a vertically adjustable ejector is preferably arranged in the upper region between the endless conveyors.

Zur vertikalen Verstellung dient insbesondere ein Hubmagnet. Je nach der Position des Auswerfers werden die Bälle dem Rohr bzw. der Ballaufnahmeeinrichtung zugeführt, die gerade aktiviert werden soll.A lifting magnet is used in particular for vertical adjustment. Depending on the position of the ejector, the balls are fed to the tube or the ball receiving device which is about to be activated.

Das Ballrohr und/oder das Versorgungsrohr können durch eine gesteuerte Klappe verschließbar sein. Dadurch läßt sich, wie geschildert, die Entnahme der Bälle aus dem Ballrohr im Trainingsbetrieb individuell steuern. Durch die Betätigung der Klappe an dem Versorgungsrohr kann hingegen der Betrieb der Ballwurfmaschine überwacht und insbesondere von der Entrichtung einer Gebühr - Einwurf einer Münze - abhängig gemacht werden.The ball tube and / or the supply tube can be closed by a controlled flap. As described, this allows the removal of the balls from the ball tube to be individually controlled in the training mode. By operating the flap on the supply tube, on the other hand, the operation of the ball throwing machine can be monitored and, in particular, made dependent on the payment of a fee - insertion of a coin.

Die Einrichtung kann so weitergebildet sein, daß eine Ausgabeöffnung zu einem mit einem Hubmagneten schwenkbaren Umlenkrohr geführt ist, welches wahlweise zu einem Ballkorb oder einem geschlossenen Ballbehälter führt. Dieses schwenkbare Umlenkrohr stellt also eine zusätzliche Weiche für die abzugebenden Bälle dar. Kombiniert mit dem verstellbaren Auswerfer können somit die Bälle beispielsweise in vier Stationen gesammelt werden, dem Ballrohr, der Ballwurfmaschine, einem Korb für die Bälle oder einem geschlossenen Ballspeicher, aus dem die Bälle nicht ohne weiteres entnommen werden können.The device can be developed in such a way that an outlet opening is guided to a deflection tube which can be pivoted with a lifting magnet and which optionally leads to a ball cage or a closed ball container. This swiveling deflection tube thus represents an additional switch for the balls to be dispensed. Combined with the adjustable ejector, the balls can thus be collected, for example, in four stations, the ball tube, the ball throwing machine, a basket for the balls or a closed ball storage from which the balls are made cannot be removed easily.

Zur Kontrolle der abgegebenen und zum Spiel- oder Trainingsbetrieb benutzten Bälle kann an einer Austrittsöffnung des Umlenkrohrs ein Zähler angeordnet sein. Dieser Zähler kann auch zur Kontrolle der Vollständigkeit der Bälle dienen.A counter can be arranged at an outlet opening of the deflecting tube in order to control the balls which have been dispensed and used for playing or training. This counter can also be used to check the completeness of the balls.

Um eine Überlastung des Ballrohrs und/oder des Versorgungsrohrs und des Vertikalförderers des Ballsammlers zu vermeiden, steht mit diesen Rohren vorzugsweise je eine Gewichtsbrücke mit einem Kontakt in Verbindung, der durch das Gewicht des Versorgungsrohrs bzw. des Ballrohrs betätigt wird, wenn eine vorgegebene Anzahl Bälle in dem Rohr überschritten wird. Durch die Kontaktbetätigung wird der Vertikalförderer rechtzeitig abgeschaltet.In order to avoid overloading the ball tube and / or the supply tube and the vertical conveyor of the ball collector, each of these tubes is preferably connected to a weight bridge with a contact which is actuated by the weight of the supply tube or the ball tube when a predetermined number of balls in the pipe is exceeded. The vertical conveyor is switched off in good time by actuating the contact.

Zur problemlosen Übergabe von Bällen aus zwei Laufrichtungen von der weiteren Ballaufnahmerinne zu dem Vertikalförderer des Ballsammlers ist nach Anspruch 19 zwischen der Ballaufnahmerinne und dem Vertikalförderer ein Zwischenspeicher mit zwei sich von der Ballaufnahmerinne nach oben erstreckenden Hilfs-Vertikalförderern und einem horizontalen Förderband angeordnet, welches zu dem Vertikalförderer führt. Aus dem Oberhalb des Horizontalförderers gebildeten Zwischenspeicher werden, die Bälle durch den Horizontalförderer selbsttätig dem Vertikalförderer des Ballsammlers zugeführt.For problem-free transfer of balls from two directions from the further ball receiving channel to the vertical conveyor of the ball collector, an intermediate storage device is provided between the ball receiving channel and the vertical conveyor according to claim 19, with two auxiliary vertical conveyors extending upwards from the ball receiving channel and a horizontal conveyor belt, which to the Vertical conveyor leads. From the intermediate storage formed above the horizontal conveyor, the balls are automatically activated by the horizontal conveyor fed to the vertical conveyor of the ball collector.

In einer Variante der Ballaufnahmerinne besteht der zu ihr gehörende Horizontalförderer aus einem in zwei übereinanderliegenden Ebenen umlaufenden Transportband, welches in einem Führungsprofil seitlich geführt ist. Damit wird eine Verschmutzung des zentralen Teils der Ballaufnahmerinne, insbesondere bei Aschenplätzen vermieden, da etwaigen Belagpartikel zu den Umlenkstellen des Horizontalförderers transportiert werden und dort herunterfallen. Weiterhin kann der seitlich geführte Horizontalförderer kaum durch Unbefugte, insbesondere Kinder demontiert oder beschädigt werden.In a variant of the ball receiving channel, the horizontal conveyor belonging to it consists of a conveyor belt running in two superimposed levels, which is guided laterally in a guide profile. Soiling of the central part of the ball receiving groove, in particular in ash places, is avoided, since any coating particles are transported to the deflection points of the horizontal conveyor and fall there. Furthermore, the horizontal conveyor on the side can hardly be dismantled or damaged by unauthorized persons, especially children.

Bei einer weiteren Variante ist der Sammelarm längs einer Führungsschiene verfahrbar, die parallel zum Netz des Spielfelds angeordnet ist und die aus zwei zueinander parallel angeordneten Profilen aus leitendem Material besteht, die einen Spalt einschließen, in denen ein Laufrad geführt ist,wobei die Profile nach außen flach abfallen und je ein Stromabnehmer an jeder Führungsschiene anliegt, die auch als Stromschiene dient. Trotz der Doppelfunktion dieser Führungsschiene kann diese so flach und sich nur wenig über dem Boden erhebend ausgebildet sein, daß sie keine gefährliche Stolperkante bildet.In a further variant, the collecting arm can be moved along a guide rail which is arranged parallel to the network of the playing field and which consists of two mutually parallel profiles made of conductive material which enclose a gap in which an impeller is guided, the profiles being directed outwards fall flat and there is a pantograph on each guide rail that also serves as a current rail. Despite the double function of this guide rail, it can be designed so flat and rising a little above the ground that it does not form a dangerous tripping edge.

Die Varianten der erfindungsgemäßen Einrichtung werden im folgenden anhand einer Zeichnung mit 16 Figuren beschrieben. Es zeigt:

  • Fig. 1 eine Draufsicht auf eine Hälfte eines Tennisplatzes mit einer weiteren Variante einer Einrichtung zum Sammeln von Bällen,
  • Fig. 2 einen Querschnitt durch eine Einzelheit der Einrichtung, nämlich im Bereich der Ballaufnahmerinne und Führung des Sammelarms,
  • Fig. 3 einen Querschnitt durch den Sammelarm in einer Position nahe der Ballaufnahmerinne, die längs einer strichpunktierten Linie abgebrochen dargestellt ist,
  • Fig. 4 einen Eckbereich der Spielplatzseiten,
  • Figuren 5 - 7 verschiedene Situationen des Sammelarms zu einer Ballwurfmaschine, die in einer Vorderansicht schematisch dargestellt ist,
  • Fig. 8 eine Gewichtsbrücke als Einzelheit eines Ballsammlers gemäß Fig. 9,
  • Fig. 9 einen Ballsammler in einer Seitenansicht,
  • Fig. 10 einen Teil des Ballsammlers, nämlich einen Vertikalförderer,
  • Fig. 11 einen Auswerfer an einem oberen Abschnitt des Vertikalförderers nach Fig. 10,
  • Fig. 12 ein verstellbares Umlenkrohr als Teil des Ballsammlers,
  • Fig. 13 den Ballsammler in einer Draufsicht,
  • Fig. 14 einen Schnitt durch eine Variante der Ballaufnahmerinne mit Horizontalförderer,
  • Fig. 15 eine Draufsicht auf eine Platzhälfte mit einem Sammelarm und Anschlagpunkten für Kontaktschalter an dem Sammelarm,
  • Fig. 16 einen Querschnitt durch eine Führungsschiene und Stromschiene zur Führung und Stromversorgung eines Sammelarms in der Ausführungsform nach den Figuren 1 und 3 und
The variants of the device according to the invention are described below with reference to a drawing with 16 figures. It shows:
  • 1 is a plan view of one half of a tennis court with a further variant of a device for collecting balls,
  • 2 shows a cross section through a detail of the device, namely in the region of the ball receiving groove and guide of the collecting arm,
  • 3 shows a cross section through the collecting arm in a position near the ball receiving groove, which is shown broken off along a dash-dotted line,
  • 4 shows a corner area of the playground sides,
  • FIGS. 5-7 different situations of the collecting arm for a ball throwing machine, which is shown schematically in a front view,
  • 8 shows a weight bridge as a detail of a ball collector according to FIG. 9,
  • 9 shows a ball collector in a side view,
  • 10 shows a part of the ball collector, namely a vertical conveyor,
  • 11 shows an ejector on an upper section of the vertical conveyor according to FIG. 10,
  • 12 shows an adjustable deflection tube as part of the ball collector,
  • 13 the ball collector in a plan view,
  • 14 shows a section through a variant of the ball receiving channel with horizontal conveyor,
  • 15 is a plan view of a half of the space with a collecting arm and attachment points for contact switches on the collecting arm,
  • 16 shows a cross section through a guide rail and busbar for guiding and supplying power to a collecting arm in the embodiment according to FIGS. 1 and 3 and

Die Figuren 1 ff. betreffen Ausführungsformen eines Sammelarms 133, die zum Zusammentreiben der Tennisbälle auf einer Platzseite und ggf. zum Glätten der Platzoberfläche vorgesehen sind, wenn diese einen partikelförmigen Belag, insbesondere einen Aschenbelag aufweist.Figures 1 ff. Relate to embodiments of a collecting arm 133, which are provided for driving the tennis balls together on a court side and possibly for smoothing the court surface if it has a particulate covering, in particular an ash covering.

Zur Vervollständigung der Sammelfunktion sind gemäß Fig. 1 sogenannte Ballaufnahmerinnen 137 - 138 längs der - halben - Spielplatzlängsseiten und der Stirnseite angeordnet. Solche Ballaufnahmerinnen sind im Querschnitt in Fig. 2 und Fig. 14 dargestellt.To complete the collection function, so-called ball receptacles 137-138 are arranged along the - half - longitudinal sides of the playground and the front side according to FIG. 1. Such ball receptacles are shown in cross section in FIGS. 2 and 14.

Um die Bälle von der Ballaufnahmerinne 137 aufzunehmen und an der gewünschten Stelle abzugeben, die beispielsweise durch eine Ballwurfmaschine definiert sein kann, aber auch eine freie Ballzuführung zu einem Trainer bedeuten kann, ist ein Ballsammler an und teilweise über der Ballaufnahmerinne 137 angeordnet, wie aus den Figuren 9 und 13 insgesamt ersichtlich.In order to pick up the balls from the ball receiving channel 137 and deliver them to the desired location, which can be defined, for example, by a ball throwing machine, but which can also mean a free ball supply to a trainer, a ball collector is arranged on and partially above the ball receiving channel 137, as shown in FIGS Figures 9 and 13 can be seen overall.

Im einzelnen ist in Fig. 1 eine Ausführungsform der Einrichtung grob schematisch dargestellt, die einen Sammelarm 133 aufweist, der in einer Erstreckung quer zu einem Netz 133a an einer Ballaufnahmerinne 137 verfahrbar ist. Der Sammelarm weist über seine Längserstreckung angeordnete, mit Punkten angedeutete, aber nicht mit Bezugszeichen versehene Motoren und zugehörige Kontaktschalter auf, so daß er bis zur gleichmäßigen Anlage an einer der Ballaufnahmerinnen 138, 139 gegen diese bewegt werden kann. In Fig. 1 ist weiter schematisch angedeutet, wie ein Ballrohr mit einer verschließbaren Öffnung zur Abgabe von Bällen an einen Trainer schwenkbar an einem Ballsammler 157 angebracht ist. Ein Versorgungsrohr 159, welches teleskopisch ausdehnbar ist, führt zu einer Ballwurfmaschine 160. Die Bewegbarkeit des Versorgungsrohrs ist mit zwei nicht bezeichneten Doppelpfeilen angedeutet. Die Ballsammelbewegung ist durch zwei abgewinkelte Pfeile 137a, 137b markiert.In detail, an embodiment of the device is shown roughly schematically in FIG. 1, which has a collecting arm 133 which extends in an extension transverse to a net 133a on a ball receiving groove 137 is movable. The collecting arm has motors arranged along its longitudinal extent, indicated with dots, but not provided with reference numerals, and associated contact switches, so that it can be moved against one of the ball receptacles 138, 139 until it lies evenly against it. 1 further schematically indicates how a ball tube with a closable opening for delivering balls to a trainer is pivotably attached to a ball collector 157. A supply pipe 159, which is telescopically expandable, leads to a ball-throwing machine 160. The mobility of the supply pipe is indicated by two double arrows, not designated. The ball collecting movement is marked by two angled arrows 137a, 137b.

In Fig. 2 ist im einzelnen die Form des Profils der Ballaufnahmerinne 137 mit zugeordnetem unterbrochen dargestellten Führungsteil 135 für den Sammelarm 133 dargestellt. Von den Rollen des Sammelarms, mit denen dieser auf dem Boden abrollt, ist nur eine Laufrolle 134 erkennbar. Die Laufrolle ist ebenso wie die übrigen Laufrollen durch jeweils einem Elektromotor angetrieben. - Die Ballaufnahmerinne 137 weist eine außenliegende Schräge 137a auf, die zum Aufgleiten bzw. Rollen von Tennisbällen, z.B. 131 dient, wenn entsprechende Ballaufnahmerinnen 138, 139 an den Spielplatzlängsseiten angeordnet sind. Die Tennisbälle rollen zu einem zentralen flachen Abschnitt 137b über nach innen gerichtete Schrägen, wo sie in Längsrichtung der Ballaufnahmerinnen transportiert werden. Der zentrale flache Abschnitt 137b kann auch als Boden bezeichnet werden. Zum Transport der Bälle über den Boden dient ein Horizontalförderer, der in der Ausführungsform nach Fig. 2 aus zwei nebeneinander umlaufend angeordneten Endlosriemen 138a, 139a besteht. Die zueinander weisenden Trumms dieser Endlosriemen liegen auf dem Boden 137b auf, während die jeweils anderen Trumms sich in nicht bezeichneten Hohlräumen der Ballaufnahmerinne bewegen. Die Bälle werden durch die innenliegenden Trumms gut geführt und mit hoher Transportgeschwindigkeit transportiert.In Fig. 2, the shape of the profile of the ball receiving channel 137 is shown with associated broken guide part 135 for the collecting arm 133. Of the rollers of the collecting arm with which it rolls on the floor, only one roller 134 can be seen. The roller is driven by an electric motor just like the other rollers. - The ball receiving channel 137 has an external slope 137a, which serves to slide or roll tennis balls, eg 131, if corresponding ball receiving channels 138, 139 are arranged on the longitudinal sides of the playground. The tennis balls roll to a central flat section 137b over inward slopes where they are transported in the longitudinal direction of the ball receptacles. The central flat portion 137b can also be referred to as a bottom. A horizontal conveyor is used to transport the balls over the floor. In the embodiment according to FIG. 2, it consists of two endless belts 138a, 139a arranged circumferentially next to each other. The mutually facing strands of these endless belts lie on the floor 137b, while the respective other dummies move in cavities of the ball receiving channel, which are not marked. The balls are well guided through the internal trumms and transported at high transport speeds.

Gemäß der Schnittdarstellung in Fig. 3 sind Laufrollen 148, 149 gegen Federn 140, 141 verschiebbar in dem Sammelarm gelagert. Wenn eine Person versehentlich auf den Sammelarm tritt, wird dieser infolge der Nachgiebigkeit der Federn nicht ohne weiteres beschädigt. Wie aus Fig. 3 weiter ersichtlich, ist das Außenprofil bzw. ein Gehäuse 133b oben gewölbt, damit die Bälle abrollen können, und seitlich in Anpassung an die Schräge 137a der Ballaufnahmerinne unterschnitten. Am weitesten ragen Endschalter 142, 143 heraus, die zum Abschalten der Antriebe der Laufräder 134, 134a verdrahtet sind, wenn der Sammelarm an eine der Ballaufnahmerinnen anstößt.According to the sectional view in FIG. 3, rollers 148, 149 are mounted displaceably against springs 140, 141 in the collecting arm. If a person accidentally steps on the collecting arm, it will not be easily damaged due to the resilience of the springs. As can also be seen from FIG. 3, the outer profile or a housing 133b is curved at the top so that the balls can roll off and undercut laterally to match the bevel 137a of the ball receiving groove. The most protruding are limit switches 142, 143, which are wired to switch off the drives of the running wheels 134, 134a when the collecting arm hits one of the ball receptacles.

In Fig. 3 ist weiterhin angedeutet, daß eine Bürste 144, die zum Glätten der Platzoberfläche durch gleichmäßige Verteilung partikelförmigen Belags dient, auf je einer Seite in Richtung der Doppelpfeile 144a, 144b gehoben oder gesenkt werden kann. Die Einstellung der Bürste 144 erfolgt dabei so, daß ein keilförmiger Spalt gebildet wird, der in Bewegungsrichtung des Sammelarms offen ist.In Fig. 3 it is also indicated that a brush 144, which is used to smooth the square surface by evenly distributing particulate coating, can be raised or lowered on one side in the direction of the double arrows 144a, 144b. The adjustment of the brush 144 is carried out so that a wedge-shaped gap is formed which is open in the direction of movement of the collecting arm.

Fig. 4 zeigt eine Übergangsstelle zwischen beiden in der Draufsicht rechtwinklig zueinander angeordneten Ballaufnahmerinnen 137, 138, an der ein kleiner Horizontalförderer 150 diagonal angeordnet ist. Dieser Horizontalförderder erleichtert den Übergang der Tennisbälle von der Ballaufnahmerinne 138 zu der Ballaufnahmerinne 137 und damit zu dem Ballsammler 157.4 shows a transition point between the two ball receiving grooves 137, 138 arranged at right angles to one another in the plan view, at which a small horizontal conveyor 150 is arranged diagonally. This horizontal conveyor facilitates the transition of the tennis balls from the ball receiving channel 138 to the ball receiving channel 137 and thus to the ball collector 157.

Mit den Figuren 5 - 7 ist dargestellt, wie sich der Sammelarm 133 unter der Ballwurfmaschine 160 durchbewegt, wenn dieser durch den Elektromotor 147, siehe Fig. 3 und weitere Elektromotoren in Richtung der nicht bezeichneten Pfeile in den Figuren 5 - 7 angetrieben wird. Sensoren bzw. Kontaktschalter 161, 162 fühlen dabei die Position des Sammelarms 133 ab. Normalerweise steht die Ballmaschine auf Stützrädern 165, 166, siehe Fig. 5. Wenn der Sammelarm den Sensor 161 erreicht, werden die Stützräder 163, 164 herabgefahren und die inneren Stützräder 165, 166 angezogen, siehe Fig. 6. Wenn der Sammelarm 133 bis unter den Sensor 162 gefahren ist, wird die ursprüngliche Konfiguration der Stützräder 163 - 166 wieder hergestellt, siehe Fig. 7.FIGS. 5-7 show how the collecting arm 133 moves under the ball throwing machine 160 when it is driven by the electric motor 147, see FIG. 3 and further electric motors in the direction of the arrows not shown in FIGS. 5-7. Sensors or contact switches 161, 162 sense the position of the collecting arm 133. Typically, the ball machine is on support wheels 165, 166, see Fig. 5. When the collector arm reaches sensor 161, the support wheels 163, 164 are lowered and the inner support wheels 165, 166 are tightened, see Fig. 6. When the collector arm 133 to below the sensor 162 is driven, the original configuration of the support wheels 163-166 is restored, see FIG. 7.

Der Gesamtaufbau des Ballsammlers 157 geht aus den Figuren 9 und 13 hervor. Zu dem Ballsammler gehören zwei kleine Hilfs-Vertikalförderer 187, 188, die in Richtung der Pfeile 132, 132a angeförderte Bälle aufnehmen und in ein Auffangbecken 189 eingeben können, wo die Bälle zwischengespeichert werden. Dort werden sie durch einen Horizontalförderer 190 zu dem Fuß eines Vertikalförderers 173 transportiert, der in Fig. 10 im einzelnen dargestellt ist. In Fig. 10 ist allerdings der Vertikalförderer ohne Zwischenschaltung des Horizontalförderers 190 über der Ballaufnahmerinne 137 dargestellt. In Fig. 10 besteht der Vertikalförderer 173 im wesentlichen aus zwei vertikal angeordneten umlaufenden Bändern 165, 165a, die in einem solchen Abstand zueinander angeordnet sind, daß zwischen ihnen ein Tennisball 131 klemmend gehalten wird. Die beiden umlaufenden Bänder 165, 165a sind durch Umlenkrollen 166 - 169 gehalten, von denen die unteren Umlenkrollen 166, 167 zugleich die Ballaufnahmeöffnung des Vertikalförderers definieren. Im oberen Bereich ist zwischen den beiden Bändern 165, 165a des Vertikalförderers ein Auswerfer 170 angeordnet, der elektromagnetisch verstellt werden kann, so daß er die zwischen den Bändern geklemmten Bälle an einer Austrittsöffnung 172 oder an einer tieferen gegenüberliegenden Stelle, die in dem Schnitt in Fig. 10 nicht erkennbar ist, auswerfen kann, die ebenfalls durch eine Ballaustrittsöffnung definiert ist. Die Verstellbarkeit des Ballauswerfers 170 mit einem Hubmagneten 171 ist in Fig. 11 angedeutet, siehe nicht bezeichneter Doppelpfeil. Die Darstellung in Fig. 11 ist dabei gegenüber derjenigen in Fig. 10 um 90° verdreht. Die Austrittsöffnung 172 führt gemäß Fig. 11 zu einem Rohr 174a.The overall structure of the ball collector 157 is shown in FIGS. 9 and 13. The ball collector includes two small auxiliary vertical conveyors 187, 188, which receive balls conveyed in the direction of arrows 132, 132a and can enter them into a catch basin 189, where the balls are temporarily stored. There they are transported by a horizontal conveyor 190 to the foot of a vertical conveyor 173, which is shown in detail in FIG. 10. 10, however, the vertical conveyor is shown without the horizontal conveyor 190 being interposed above the ball receiving channel 137. In Fig. 10, the vertical conveyor 173 consists essentially of two vertically arranged circumferential belts 165, 165a, which are arranged at such a distance from one another that a tennis ball 131 is held clamped between them. The two circulating belts 165, 165a are held by deflection rollers 166-169, of which the lower deflection rollers 166, 167 also define the ball receiving opening of the vertical conveyor. In the upper area is between the two belts 165, 165a of the vertical conveyor an ejector 170 is arranged which can be adjusted electromagnetically so that it can eject the balls clamped between the bands at an outlet opening 172 or at a lower opposite point, which cannot be seen in the section in FIG Ball exit opening is defined. The adjustability of the ball ejector 170 with a lifting magnet 171 is indicated in FIG. 11, see double arrow, not shown. The illustration in FIG. 11 is rotated by 90 ° with respect to that in FIG. 10. The outlet opening 172 leads to a pipe 174a according to FIG. 11.

Ein Umlenkrohr 174 kann ebenfalls verstellbar sein, und zwar um eine Hochachse mit dem Hubmagneten 179, siehe Fig. 12. Je nach der Einstellung des Umlenkrohrs 174 werden die Bälle in eine Austrittsöffnung 181 zu einem geschlossenen Ballspeicher 178 oder aber zu einem offenen Ballkorb 177 transportiert, siehe auch Figuren 9 und 13.A deflection tube 174 can also be adjustable, specifically about a vertical axis with the lifting magnet 179, see FIG. 12. Depending on the setting of the deflection tube 174, the balls are transported into an outlet opening 181 to a closed ball storage 178 or to an open ball basket 177 , see also Figures 9 and 13.

Gemäß Fig. 9 befindet sich über einer nicht bezeichneten Austrittsöffnung zu dem Umlenkrohr 134 eine weitere Austrittsöffnung zu einem Versorgungsrohr 159 welches teleskopisch zu der Ballwurfmaschine 160 geführt ist und an seinem unteren Abschnitt durch eine Klappe 175 verschließbar ist. Darüber befindet sich im Bereich des Vertikalförderers eine Austrittsöffnung für das Ballrohr 158, welches durch eine Klappe 176 gesteuert verschließbar ist und zum direkten Trainingsbetrieb dient. Sowohl an dem Ballrohr 158 als auch an dem Versorgungsrohr 159 ist jeweils eine Gewichtsbrücke 183 bzw. 186 angeordnet, deren Aufbau im einzelnen aus Fig. 8 hervorgeht:
   Die Gewichtsbrücke besteht aus einem federnd aufgehängten Teil 183a, mit dem Kontaktschalter 184, 185 betätigt werden können, die in Reihe geschaltet sind. Wenn beide Kontaktschalter durch das Gewicht der Bälle 131 geschlossen sind, kann der Antrieb des Vertikalförderers 173 abgeschaltet werden,und es werden keine weiteren Bälle in das Ballrohr transportiert. Die Gewichtsbrücke 186 ist in gleicher Weise aufgebaut und steuert die Ballzufuhr zu dem Versorgungsrohr 159.
According to FIG. 9, there is a further outlet opening to a supply pipe 159, which is guided telescopically to the ball throwing machine 160 and can be closed at its lower section by a flap 175, via an outlet opening to the deflection tube 134, which is not designated. Above this is an outlet opening for the ball tube 158 in the area of the vertical conveyor, which can be closed in a controlled manner by a flap 176 and is used for direct training operation. A weight bridge 183 and 186, respectively, is arranged both on the ball tube 158 and on the supply tube 159, the structure of which is shown in detail in FIG. 8:
The weight bridge consists of a resiliently suspended part 183a with which contact switches 184, 185 can be actuated, which are connected in series. If both contact switches are closed by the weight of the balls 131, the drive of the vertical conveyor 173 can be switched off and no further balls are transported into the ball tube. The weight bridge 186 is constructed in the same way and controls the ball supply to the supply pipe 159.

Es wird noch bemerkt, daß die Ballmaschine 160 mit einem Trittbrett versehen sein kann, welches in den Figuren 5 - 7 in den Bereichen der Stützrollen 163, 164 liegt, damit eine Person beim Durchfahren des Sammelarms hierauf stehend nicht behindert wird.It should also be noted that the ball machine 160 can be provided with a footboard which, in FIGS. 5-7, lies in the areas of the support rollers 163, 164, so that a person is not hindered when the collecting arm is passed through when standing on it.

In Fig. 15 sind Anschlagpunkte für die in dem Sammelarm 133 untergebrachten Kontaktschalter mit 197 - 202 bezeichnet, um eine gleichmäßige Anlage des Sammelarms an die betreffenden Ballaufnahmerinnen zu gewährleisten. In dieser Ausführungsform wird der Sammelarm in einer Führungsschiene 193 parallel zu einem Netz 133a geführt. Der Aufbau der Führungsschiene 193 ergibt sich im einzelnen aus Fig. 16 Die Führungsschiene besteht aus zwei Profilen 194, 195, die unsymmetrisch dachförmig geformt sind und zwischen ihren kürzeren steil abfallenden Teilen einen Spalt oder Kanal bilden, in dem ein Laufrad 203 des Sammelarms seitlich geführt ist. An dem Sammelarms sind weiterhin voneinander elektrisch isoliert Schleifkontakte 204, 205 angebracht, die zur Stromzufuhr zu den in dem Sammelarms untergebrachten Antriebsmotoren dienen. Zur Stromzufuhr sind die Profile 194, 195 aus elektrisch leitendem Material - Metall - gefertigt und dienen somit auch als Stromschiene.15, attachment points for the contact switches accommodated in the collecting arm 133 are designated by 197-202, in order to ensure a uniform contact of the collecting arm with the relevant ball receptacles. In this embodiment, the collecting arm is guided in a guide rail 193 parallel to a network 133a. The structure of the guide rail 193 results in detail from Fig. 16. The guide rail consists of two profiles 194, 195, which are asymmetrically shaped roof-shaped and form a gap or channel between their shorter, steeply falling parts, in which an impeller 203 of the collecting arm is guided laterally is. Sliding contacts 204, 205, which are electrically insulated from one another and are used to supply current to the drive motors accommodated in the collecting arm, are also attached to the collecting arm. For power supply, the profiles 194, 195 are made of electrically conductive material - metal - and thus also serve as a busbar.

Die in Fig. 14 dargestellte Ausbildung der Ballaufnahmerinne eignet sich nicht nur zur Ballaufnahme, sondern auch zur Führung des Sammelarms mit dem Führungsprofil 192, und zwar mit dem rechten umgekehrt U-förmigen Teil in Fig. 14 Wenn die Ballaufnahmerinne zur Führung verwendet werden soll, wird sie mit dem umgekehrt U-förmigen Teil zu dem Spielfeld weisend montiert. Wenn hingegen die Ballaufnahmerinne zum Sammeln von Bällen dienen soll, wird sie mit dem abgeflachten Teil zum Spielfeld hin gerichtet fixiert. Es genügt also in vorteilhafter Weise ein Profil zur Ausübung zweier unterschiedlicher Funktionen.The configuration of the ball receiving channel shown in FIG. 14 is not only suitable for receiving the ball, but also for guiding the collecting arm with the guide profile 192, specifically with the right inverted U-shaped part in FIG. 14. If the ball receiving channel is to be used for guiding, it is mounted with the inverted U-shaped part facing the playing field. If, on the other hand, the ball receiving channel is to be used for collecting balls, it is fixed with the flattened part facing the playing field. A profile is therefore advantageously sufficient for performing two different functions.

Zur Fixierung der Ballaufnahmerinne dient ein Doppelklebeband 193, so daß der Boden nicht wie sonst bei einer Anbringung von Dübeln beschädigt wird. Außerdem kann diese Fixierung rasch und unkompliziert erfolgen.A double-sided adhesive tape 193 is used to fix the ball receiving channel, so that the floor is not damaged as is otherwise the case when dowels are attached. This fixation can also be done quickly and easily.

Claims (23)

  1. A device for collecting tennis balls with a collector arm (133) which can travel over the ground of a tennis court with a net, transverse to its longitudinal axis, characterised in that the collector arm (133) extends transversely to the net (133a) on at least one half of the tennis court and can travel along the net (133a), wherein the collector arm is guided at one of its two ends in a running rail (135, 137, 192, 193).
  2. A device according to Claim 1, characterised in that the running rail (135, 137, 192, 193) is disposed at one end of the tennis court.
  3. A device according to Claim 2, characterised in that banks of contacts, with which contacts (204, 205) fastened to the collector arm (133) engage, are disposed hidden in the running rail (135, 137, 192, 193), which banks of contacts serve in particular for the supply of current to the drive motors of the collector arm (133).
  4. A device according to Claim 1, characterised in that the collector arm (133) has an external profile which rejects balls, and that shallow ball receiver channels (137, 138, 139), to which the collector arm can travel and into which the collector arm (133) pushes the balls, are disposed on the longitudinal sides of the court.
  5. A device according to Claim 4, characterised in that at least one flat, circulating horizontal conveyor (138a, 139a, 191) for the balls is disposed in the ball receiver channel (137, 138, 139).
  6. A device according to Claim 5, characterised in that the horizontal conveyor (191) in the ball receiver channel comprises an endless transfer belt circulating in two planes lying one above the other, which is laterally guided in a guide section (192).
  7. A device according to Claim 4, characterised in that the ball receiver channels (138, 139) have a shallow sloping surface (137a) on the side facing the collector arm (133), and that the external profile of the collector arm (133) is set back on the outside at the bottom along the side edges, similar to the shape of the sloping surfaces (137a).
  8. A device according to Claim 4, characterised in that an additional shallow ball receiver channel (137), to which the collector arm (133) can travel, is disposed on an end side of the half-court between the longitudinal sides of the court, which additional ball receiver channel is directed at the corners on to ball receiver channels (138, 139) disposed on the longitudinal sides of the court, and is supplied by these ball receiver channels, and that a ball collector (157) is disposed on the additional ball receiver channel.
  9. A device according to Claim 8, characterised in that the ball receiver channel (137) disposed on the end side of the half-court is formed with a guide section (135, 192) which serves as a running rail for guiding the collector arm (133) on one side.
  10. A device according to Claim 3, characterised in that a multiplicity of drive wheels (134) is disposed in the collector arm (133), displaced in the direction of the longitudinal axis of the collector arm (133), and each drive wheel is coupled to a drive motor.
  11. A device according to Claim 10, characterised in that the drive wheels (134) are resiliently fastened to the collector arm (133).
  12. A device according to Claim 10, characterised in that at least two limit switches (142, 143) are provided, offset in the direction of the longitudinal axis of the collector arm (133), which limit switches can be actuated at the final positions of the collector arm (133).
  13. A device according to Claim 1, characterised in that a ball throwing machine (160), which has automatic, alternately raisable and lowerable wheels or feet (163 - 166) at a distance from each other, is disposed on the tennis half-court, and that sensors (162) are provided which sense the position of the collector arm (133), and which control the raising or lowering of the wheels or feet so that the collector arm (133) can travel through underneath the ball throwing machine (160).
  14. A device according to Claim 1, characterised in that the collector arm (133) feeds the balls via a ball receiver channel (137, 138, 139) to a ball collector (157) in which an intermediate store (189) for balls is disposed, which can be attached by means of a vertical conveyor (173) with a distributing guide (170) to a feed tube (159) of a ball throwing machine (160) or to additional ball receiver devices (177, 178), according to choice.
  15. A device according to Claim 14, characterised in that the feed tube (159) is constructed so that it is movable telescopically.
  16. A device according to Claim 14, characterised in that in addition a ball tube (15) with a flap (176), which can pivot above head height and which can be controlled for the individual delivery of balls, can be attached to the vertical conveyor (173) .
  17. A device according to Claim 14, characterised in that a distributing guide (174), which can be actuated by means of a lifting magnet (179), is disposed on an outlet aperture of the vertical conveyor (173), which distributing guide leads to a ball basket (177) or to a closed ball container (178) as the ball receiver devices, according to choice.
  18. A device according to Claim 17, characterised in that a ball counter (180) is disposed on the distributing guide (174).
  19. A device according to Claim 14, characterised in that two auxiliary vertical conveyors (187, 188) extend between the ball receiver channel (137) and the intermediate store (189).
  20. A device according to Claim 14, characterised in that the vertical conveyor (173) has two circulating belts with two strands running upwards and facing each other at a distance from the balls.
  21. A device according to Claim 20, characterised in that the faces which are directed towards each other of the strands which face each other are provided with an Friction coating.
  22. A device according to Claim 1, characterised in that the collector arm (133) has a smoothing element (144) directed towards the ground for smoothing the playing surface coating.
  23. A device according to Claim 22, characterised in that the smoothing element (144) can pivot about an axis lying parallel to the longitudinal axis of the collector arm (133).
EP89120769A 1988-11-09 1989-11-09 Device for collecting balls, especially tennis balls, and/or for smoothing a game court Expired - Lifetime EP0372249B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89120769T ATE84978T1 (en) 1988-11-09 1989-11-09 DEVICE FOR COLLECTING BALLS, IN PARTICULAR TENNIS BALLS, AND/OR FOR SMOOTHING THE SURFACE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3838023 1988-11-09
DE3838023 1988-11-09
DE3901555 1989-01-20
DE3901555A DE3901555A1 (en) 1988-11-09 1989-01-20 DEVICE FOR COLLECTING BAELLS, ESPECIALLY TENNIS BAELLS, AND / OR SMOOTHING THE PLAYING MAT

Publications (2)

Publication Number Publication Date
EP0372249A1 EP0372249A1 (en) 1990-06-13
EP0372249B1 true EP0372249B1 (en) 1993-01-27

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EP89120769A Expired - Lifetime EP0372249B1 (en) 1988-11-09 1989-11-09 Device for collecting balls, especially tennis balls, and/or for smoothing a game court

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EP (1) EP0372249B1 (en)
DE (2) DE3901555A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2343106A2 (en) 2010-01-12 2011-07-13 Foxtenn Bgreen, S.L. Method, system and apparatus for the automatic collection and delivery of spherical game elements

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664171B1 (en) * 1990-07-06 1993-02-05 Couderc Laurent INSTALLATION ADDED TO A TENNIS COURT FOR GLOBALLY RECOVERING THE BALLS AT THE END OF EACH EXCHANGE.
DE19711298A1 (en) * 1997-03-19 1998-09-24 Hans Nopper Object collection method
CN110685418B (en) * 2018-07-06 2021-11-23 赵炳九 Coating floor inclined structure for automatic supply of ball items
CN110681133A (en) * 2019-10-31 2020-01-14 北京工业大学 Bimodal control method for table tennis ball picking robot
CN112337063A (en) * 2020-11-05 2021-02-09 安徽震雄新材料有限公司 Automatic ball picking device in tennis match

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Publication number Priority date Publication date Assignee Title
DE2448830C3 (en) * 1974-10-14 1979-07-12 Otto 2053 Schwarzenbek Gansewig Device for the horizontal alignment of a sand surface
US4456252A (en) * 1981-09-14 1984-06-26 Hartland Albert C Tennis service practice court with recovering and collecting means
US4606543A (en) * 1981-09-14 1986-08-19 Hartland Albert C Practice tennis court
DE3242358A1 (en) * 1981-11-20 1983-05-26 Joseph Adrianus Helmond Groes Ball collecting and returning device for tennis courts
US4575081A (en) * 1984-09-24 1986-03-11 Cavanagh Peter A Tennis ball retrieving system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2343106A2 (en) 2010-01-12 2011-07-13 Foxtenn Bgreen, S.L. Method, system and apparatus for the automatic collection and delivery of spherical game elements
WO2011086480A2 (en) 2010-01-12 2011-07-21 Foxtenn Bgreen, S. L. Method, system and apparatus for the automatic collection and delivery of spherical game elements
EP2835154A1 (en) 2010-01-12 2015-02-11 Foxtenn Bgreen, S.L. System and apparatus for the automatic collection of spherical game elements

Also Published As

Publication number Publication date
DE3901555A1 (en) 1990-05-10
DE58903404D1 (en) 1993-03-11
EP0372249A1 (en) 1990-06-13

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