DE7635919U1 - Device for collecting tennis balls - Google Patents

Description

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FROM KREISLER SCHONWALD MEYEk EISHOLD FUES FROM KREISLER KELLER SELTING

PATENT LAWYERS Dr.-Ing. by Kreisler f 1973

Dr.-Ing. K. Schönwald, Cologne Dr.-Ing. Th. Meyer, Cologne Dr.-Ing. K. W. Eishold, Bad Soden Dr. J. F. Fues, Cologne Dipl.-Chem. Alek von Kreisler, Cologne Dipl.-Chem. Carola Keller, Cologne, Dipl.-Ing. G. Selling, Cologne

Sch-DB / Ko

5 COLOGNE I 11 NOV. I976

DEICHMANNHAUS AT THE MAIN RAILWAY STATION

Miss Dr. Margarete Mersch, née Mersch, Drususstrasse 57, 6200 Wiesbaden

Device for collecting tennis balls

The invention relates to a device for collecting tennis balls.

The use of an automatic ball thrower is becoming more and more widespread in tennis halls and tennis courts, the one, but also alternately two players, automatically one in adjustable time periods Throws tennis ball. Such a throwing machine shoots up to 200 balls from a ball supply Player or the players are repulsed. On the floor of the tennis hall or tennis court then tennis balls are scattered and have to be by hand

Telephone: (02

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rnm: Dompatent Cologne

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be picked up. This is a tent stealing and Arduous work and the time spent on it is lost in effective playing time.

In order to address this shortcoming, an apparatus for collecting tennis balls has already been proposed. This is designed as an elongated basket that is carried on a rigid bracket and into which the balls pass a bottom flap mechanism can be pushed in. To pick up a tennis ball with the basketball device, put this over the tennis ball and jerked it against the ground, causing the flap mechanism to through " the ball itself is released and opened so that the ball enters the basket. As the basket will be carried must, it becomes more and more a hindrance in the course of the collection work due to the increasing weight with increasing filling and is harder to handle. In order to keep this within tolerable limits, the basket is proportionate kept small and has to take up a tennis ball charge shot by the throwing machine several times be emptied. In addition, the ball column in the basket presses against the flap mechanism from above and prevents it from pivoting towards the inlet of a further ball.

The invention has for its object to provide a device for collecting tennis balls, which has a large Number of tennis balls automatically and quickly picks up from the ground and promotes to a collecting container, its with increasing filling, increasing weight is not burdensome for the person operating the device.

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This object is achieved by a carriage equipped with a collecting container for the tennis balls, on which a collecting and lifting device is arranged, which extends from the floor to an upper opening of the collecting container and throws the tennis balls into it. ''

A device designed in this way has the advantage that it can be moved as a mobile carriage and during this process of the Aufsammei- and lifting device picked up the balls from the ground and into the Collection containers are promoted. The person operating the device therefore does not need the collecting container to carry the tennis balls that have been picked up, nor does she have to bend down to pick up the balls or anything else Carry out any manipulations to operate the device that are time-consuming or debilitating would be. All you have to do is push the car across the field littered with tennis balls and at the same time the collection and conveyance into the collecting container takes place the tennis balls automatically. Since the collecting container is carried by the car and its filling weight. < therefore does not matter to the operator, it can be made large enough to at least accommodate the Load of a ball throwing machine of up to 200 bales or more to be able to hold. Therefore there is no intermediate emptying of the collecting container is necessary during the collecting process and this also makes the collecting process accelerated.

The Aufsammei- and lifting device can be in numerous Train variants equally advantageous. For

In any case of such a modification, it is advisable that the Aufsammei- and lifting device close to the floor lying guardrails are connected upstream at the front end of the car, starting from the ground-level The inlet end of the collecting and lifting device extends outward in a V-shape. The distance between the outer ends of the guardrails is advantageously a maximum of about 2.50 m, so that a considerable coverage of the device is given, although the car itself can be kept narrow and manoeuvrable. the When moving the car, guide plates inevitably lead to a large number of tennis balls lying on the floor in the middle to the inlet end of the collecting and lifting device.

The guardrails are advantageously attached to the car interchangeably, so that shorter ones for longer ones or vice versa Can be exchanged - depending on whether the device is in the tennis hall or on larger tennis courts is used. To achieve interchangeability, a plug connection can be provided. Alternatively Each guardrail can be made adjustable in length, e.g. telescopic, so that one and the same guardrail can be adapted to the respective purpose of the device by shortening or lengthening it.

Each guardrail is mounted on the trolley so that it can be folded up. To fold up each guardrail one can manually actuatable cable servant, each cable can be actuated individually, so that, for example, to bypass an obstacle or the like. each guardrail can be raised individually. For space-saving storage

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len of the machine, both guardrails are expedient swiveled up.

The car has a rigid front axle and at least one rear pendulum wheel, and these are useful both front wheels of the car each * r? it one Equipped free-wheel. When driving sharp right or left turns, the differential effect has the effect that only the outer wheel turns, so that the inner wheel does not drag on the tennis floor and it will not be damaged or even impaired by the device.

According to a possibility according to the invention, as Aufsammei- and lifting device serve at least one endless conveyor belt, the surface of which is rubber-elastic and is structured and which cooperates with a guide plate, which is slightly smaller than the distance Tennis ball diameter runs essentially parallel to one strand of the belt and begins just above the ground and ends above the collecting container. The interaction of the on the surface makes it rubber-elastic and structured conveyor belt with the guide plate picking up the balls from the floor and pushing it up between the conveyor belt and the guide plate up to the discharge port in the collecting container achieved. The distance between the one conveyor belt run and the guide plate is dimensioned so that the standardized tennis balls by frictional engagement with the Iranian belt on the smooth guide plate to oüai will. The drive of the drive roller of the conveyor belt can be derived from the running wheels of the carriage or it can be a separate drive motor

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be provided for the car. Through suitable translation |

ratio can change the speed of rotation of the |

Conveyor belt so that the ten- j

nis balls even with relatively slow feed \

move the carriage upwards fast enough |

be changed. t j

In an expedient embodiment of the invention, min-S

at least one conveyor belt around a lower drive roller

and an upper tension pulley with a horizontal axis in the · \

Rotate counterclockwise. The leadership |

plate assigned to the lower belt run. The ones from the |

Leading organs against the incoming end of the Aufsammei- and I

Lifting device guided tennis balls are lifted by the |

Circulation of the conveyor belt counterclockwise from I

the lower run conveyed via the guide plate §

over their upper appropriately against the collecting container f

The bent edge of the balls into the collecting container- I

be thrown. |

In the case of a conveyor belt whose lower run |

the upwardly collected good to be conveyed friction, g

firmly grasped and over the smooth guide plate |

two types of f

On the collection of the balls by the conveyor belt I moderate.

Once the drive roller of the conveyor belt can be tight
be provided above the floor because the balls of
inserted from the side into the space between the conveyor belt and the guide plate and from there to
can be taken upstairs and, on the other hand, the

The drive roller of the conveyor belt should be provided at such a distance from the floor that the tennis balls are pressed centrally through under the drive roller against the lower end of the guide plate, from where they are pushed upwards on the guide plate by frictional engagement with the conveyor belt. ,

In the first case, the guide plate has a pivotable lower end portion extending from one in the direction the spring acting on the drive roller is acted upon, and there is a disk on the shaft of the drive roller non-rotatably provided, on the circumference of which cam projections are formed at equal intervals, which with a on the foldable end part of the guide plate arm attached to cooperate against the spring force. Each of The tennis ball, which is guided on the side against the lower conveyor belt strand, gets caught in the grip of the guide plate arm enlarged with a curved projection Distance between the conveyor belt and the guide plate and is removed as soon as the guide plate arm of the curve protrusion comes free from the spring force The lower end part of the guide plate, which has been adjusted back to its basic position, is pressed against the conveyor belt, so that the tennis ball is somewhat wedged between the conveyor belt and the guide plate and that of his Entrainment by the conveyor belt required frictional engagement is established. The disc with the curved projections can be arranged between two endless conveyor belts, and it can be any conveyor belt be assigned a side tennis ball feed. If necessary, both conveyor belts are involved only one straight guide plate, the lower end part of which is pivotable.

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A central inlet of the tennis balls to the pick-up and lifting device is achieved when one is roughly flat S-shaped guide plate is integrally rigid and cooperates with a conveyor belt in which the drive roller at a distance from the floor slightly below the tennis ball diameter is. The tennis balls are slightly compressed when they pass under the drive roller of the conveyor belt, so that they are conclusively grasped and from the conveyor belt to the directly adjoining guide plate arrive, on which they are pushed up and thrown into the collecting container.

The pick-up and lifting device is also equipped with a central inlet, with two side by side Conveyor belts located around rollers with a standing axis rotate in opposite directions to each other and between a base plate is provided on both conveyor belts, which has a guide plate assigned to the inner conveyor belt strands wearing. The efficiency of this collection and lifting device is very high. The individual tennis balls are guided in two tracks, each made up of a base plate half and the one on edge There are guide plate and on which the two inner conveyor belt strands they go up in the direction of the Take the collecting container with you. For drive transmission on the drive rollers with a stationary axis can each have a bevel gear with a translation of at least approximately 1: 1.5 serve. Through this translation, the tennis balls are quickly on their way up into the collecting container guided.

In a further embodiment of the invention, the collecting and lifting device can be used as a screw conveyor, a paddle belt conveyor or the like. be trained.

In addition, the Aufsammei- and lifting device with a Suction fan, which is driven by a gasoline or electric motor, and the tennis balls in the collection container sucks. The suction air flow is expediently effective in a suction pipe, the one after has front-facing suction opening, the diameter of which is slightly larger than the diameter of a tennis ball is. The suction pipe ends in an airtight box in which the collecting container is housed. Because the diameter of the suction opening of the suction pipe is only slightly larger than the diameter of a tennis ball, the suction opening is when entering a tennis ball essentially closed, and a weak suction air flow is sufficient to the tennis ball to pull up in the tube until it emerges at the mouth opening in the collecting container. Therefore, a relatively inefficient suction fan are used, the power consumption of which is correspondingly low so that the car is not significantly weighed down by the motor and the fan.

The suction opening is advantageous through an inclined gate formed the suction pipe end. The inclined cut runs so that the rear edge of the pipe far, e.g. to a distance of about 2 cm from the floor, while the front edge of the tube a distance of the order of magnitude of the tennis ball diameter, i.e. approx. 7 cm, from the foot

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has ground. If the tennis balls are guided by the guide rails against the suction opening when the device is moved they hit the deeply drawn-down rear apron of the suction pipe and become in the same Moment absorbed by the suction flow and transported into the collecting container. *

The collecting container is expedient in all exemplary embodiments designed as an interchangeable wire basket provided on the trolley. For one that works with suction air Collecting and lifting device, the wire basket is set in the airtight box, and it is the box closed by a lid. As soon as the suction fan is switched off, the cover can be removed, and the collecting container can be removed.

With the exception of the guardrails, the entire car structure is covered with a cover, preferably made of glass fiber reinforced Polyester resin covered, which is stored on the chassis of the car so that it can be folded forward. At the At the rear end of the cover, at least one handlebar is attached to guide the car. On the handlebar are actuators, e.g. switches for motors and suction fan as well as means for adjusting the cables for pivoting the guardrails in a vertical position Level and attached to unlock the cover, as an actuator for the cables Handles designed as rotary handles are used, the rotary adjustment of which is used to achieve the desired pivoting path the guardrails of about 90 ° is sufficient.

To gain access to the collection container, the

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cover is unlocked and when the cover is lifted, the deodorant of the airtight box is released at the same time, in which the collecting container is housed, raised. A torsion spring can make it easy to use Swing the cover up and down.

In the drawing, exemplary embodiments of the invention are shown schematically. It shows:

Fig. 1 is a perspective view of the device with closed Cover hood,

Fig. 2 is a plan view of the device according to Fig. 1,

Fig. 3 shows a section along the line IH-III in Fig. 2,

4 shows a detail to illustrate the point of attack of the Bowden cable on a guardrail,

ι 'Fig. 5 is a section along the line V-V in Fig. 3,

15 FIG. 6 shows a plan view according to the arrows VI-VI in FIG.

7 to illustrate a further embodiment of the Device in which the balls are fed from the side to the inlet end of the pick-up and lifting device will,

Fig. 7 is a schematic longitudinal section along the line VII-VII in Fig. 6;

Fig. 8 is a perspective view of an embodiment with two conveyor belts, which around rollers with vertical Rotate axis,

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Pig. 9 shows an embodiment in which the collecting and lifting device consists of a suction arrangement, in a diagrammatic view Opinion,

Fig. 10 is a side view of the device according to Fig. 9,

Figs. 11 and 12 side view and top view of a further embodiment of a device with a suction arrangement.

A carriage 1 on which a collecting and lifting device and a collecting container are arranged is preferred of four wheels, namely two large wheels 2 and at least supported on a rigid front axle carried by a smaller rear pendulum wheel J5. The entire car body is covered by a cover 4 clad in particular from glass fiber reinforced polyester resin. On the cover 4 there are two handlebars 5 attached, with which the carriage 1 can be moved by hand. Each handlebar 5 carries a rotary handle designed handle 6 and a lever 7.

The levers 7 are used to trigger a locking _; device 8, which is provided on the two lower edges of the hood 4 and engages with counter-members 8a on the chassis of the car (Fig. 3). After the locking device 8, 8a has been unlocked, the covering hood 4 can be raised and tilted forward about pivot bearing 9. Two torsion springs, not shown for the sake of clarity, ensure easy handling when folding the cover 4 up and down,

At the front end there are two over the cover 4

Guard rails 10 before, made of flat metal profiles can be made and are mounted on the chassis of the car 1 foldable up and down. The guide rails 10 protrude from the hood 4 at the front. The run in the folded down position two guard rails 10 spread outward. They advantageously close a common angle of 45 ° a. The distance between the outer ends of the two guardrails 10 can be a maximum of approximately 2.50 m.

Each guardrail 10 is folded down Position at a distance from the floor that is smaller than the diameter of tennis balls.11, see above that these meet when the carriage 1 is against the guardrails 10 and along them against the Carriages are guided. To adapt to the intended use of the device, e.g. on a tennis court or In a tennis hall, the carriage 1 can be equipped with guardrails of different lengths. For this purpose, an easy-to-use plug-in device 12 (FIG. 3) is to proceed. Depending on the Choice of longer or shorter guard rails 10 can be simply attached. In a further embodiment of the According to the invention, the guardrails can also be telescopic. Such a possibility is shown in FIG. The guardrails consist in this case of two parts 10a and 10b, which after loosening one Screw mechanism I3 or the like. relative to each other are displaceable and can be locked in the desired position to each other.

To fold up or down the guardrails 10 are

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operated by the rotary handles 6, which each have a Bowden cable 14 (Fig. 4) with the guide rails 10 in connection stand. If, for example, scattered in one place during the movement of the car for collection Tennis balls 11 an obstacle, ζ.B, a chair or Like. In the way, the associated Bowden cable 14 can be shortened by actuating a rotary handle 6 and thus a guardrail 10 around a pivot point 15 (Fig. 4) be swiveled up. After passing the obstacle, turn the handle in the opposite direction Guard rail 10 lowered again. There is a further advantage of the guardrails 10 being able to be folded up in the fact that when the guardrails are folded up, the entire device is compact and small and can be stored in a space-saving manner leaves.

Figs. 2 to 5 leave the structure of the device under the hood 4 recognize schematically.

On a platform 16 is a collecting container 17, which can be designed, for example, as a wire basket and is detachably provided so that a filled collecting container 17 can be exchanged for an empty one. The collecting container 17 is located in the direction of travel of the car 1 at the rear and it is of one in different Embodiments possible Aufsammei- and lifting device with tennis balls 11 charged. According to the first Embodiment consists of the Aufsammei- and lifting device from a centrally arranged conveyor belt 18 with a rubber-elastic and structured surface, around a drive roller 19 and an upper tension roller 20 revolves with horizontal axes 21 and 201, respectively

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the tension roller 20 is mounted in a frame 24 (FIG. 5) is. The drive roller I9 is keyed on the rigid front axle 21 so that when the car is moved 1 the drive of the conveyor belt l8 from the running wheels 2 is derived.

The drive roller I9 is at a distance from floor A, which is slightly smaller than the diameter of the standardized tennis balls 11. The conveyor belt 18 runs in Counterclockwise around and its lower (in Fig. 3 right) strand is assigned a guide plate 22, which runs substantially parallel to the run, starts just above floor A and above the sump

17 ends. The guide plate 22 advantageously runs curved flat S-shaped. The guide plate has a smooth surface and is advantageously made of sheet metal. Your distance to the lower belt run of the conveyor belt

18 is slightly smaller than the diameter of a tennis ball 11.

To make the guide rails 10 easier when they are pivoted To be able to handle, they are expediently not up to the inlet end of the collecting and lifting device 18 to 22, but they are continued by guide elements, e.g. curved metal sheets 23, their height essentially corresponds to the height of the guardrails. The inner ends of the guide plates 23 form a shaft, in which the tennis balls 11 enter. To avoid jams of the tennis balls at the inlet end of the device the shaft between the baffles is divided into two equal channels. A bridge 25 is used for this purpose, which e.g. is screwed to the underside of the platform l6

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can be and either - as shown - protrude with a nose under the drive roller 19 or at the inlet can end under the drive roller.

By pushing the carriage 1 forward, the tennis balls are 11 pushed from the guardrails in the direction of the pick-up and lifting device and from the guide plates 23 and the intermediate web 25 are guided against the conveyor belt 18. Since the conveyor belt 18 counterclockwise runs around, the tennis balls come under the * drive roller 19 »whereby they are somewhat compressed and be conveyed backwards against the guide plate 22. When it hits the guide plate 22, everyone Tennis ball 11 by frictional engagement with the lower run of the conveyor belt 18 on the guide plate 22 pushed up until it comes free from the conveyor belt 18 and over the upper edge of the guide plate 22 falls into the collecting container I7. The filled collecting container 17 is removed from the car after lifting the cover 4 and through an empty container replaced.

In the example according to FIGS. 6 and 7 become two identical Conveyor belts 30 are used, which are also elastic and structured, e.g. with small Have projections occupied surface. Each conveyor belt 30 runs around a lower drive roller I9 and an upper idler 20 counterclockwise. As in the first example, the drive can come from the running wheels 2 of the carriage 1 can be derived. The main difference to the mentioned embodiment is in that baffles 3I, which the guide rails 10 after

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continue at the rear, together with a, e.g. frame-like, arranged under the pick-up and lifting device Body 32, whose distance from the floor A corresponds approximately to that of the Leitschiaien, two symmetrical Form inlet channels 33. Each inlet channel 33 is assigned to a conveyor belt 30 and guides the Tennis balls one behind the other from the side into the space between the lower run of the conveyor belt 30 and a guide plate 34. The course of the Guide plate. 34 essentially corresponds to that of the guide plate 22. However, at its lower end it has an end part which can be folded towards the upper part 35, which is held by a tension spring 36 so that it kinks the upper part of the guide plate continues. A forwardly directed arm 37, which has curved projections 38, is attached to the end part 35 on a disk 39, as described below, cooperates. The disc 39 is common with the drive rollers 19 of the conveyor belts 30 are non-rotatably provided and located on the front axle 21 of the running wheels 2 between these two drive rollers. Upon impact a curved projection 38 against the arm 37, the end portion 35 of the guide plate is briefly backwards deflected and at this moment a tennis ball is pushed into the space between the conveyor belt from the side 30 and end part 35 pushed. At the next moment, curved projection 38 and arm 37 and separate the end portion 35 is withdrawn by the spring 36 in the basic position, so that the tennis ball against the lower Belt run is pressed and taken up by this on the guide plate 34. For fixing of the upper immovable part of the guide plate 34

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a stand 40 is attached to the platform 16. In this embodiment, the carriage can be lower than in the first embodiment, because the drive roller 19 is tight due to the lateral inlet of the balls may be provided above the ground.

Another exemplary embodiment is illustrated in FIG. 8. Also here are two conveyor belts 4.1 is used, the rollers 42 and 4 3 of which, however, can be rotated about vertical axes. For the transmission of the drive from the running wheels 2 to the drive rollers 42 are a bevel gear ratio 44 and a gear and Chain drive 45. A gear ratio of 1: 1.5 is expediently chosen so that the tennis balls 11 also with relatively slow feed speed of the carriage 1 are quickly promoted into the collecting container I7.

The respective inner run of each conveyor belt 41 interacts with a guide plate 47 mounted on edge on a base plate 46, in the same way as in connection with the example in FIGS. 3 to 5 explained. The arrangement of the guide guides 10, 23 and 25 essentially corresponds to that of the aforementioned example. If necessary, the guide plate 47 can be extended downward so that a separate attachment of the central web 25 can be dispensed with.

The example of FIGS. 9 and 10 differs from the examples in FIGS. 2 to 8 in principle insofar as the collecting and lifting device is designed as a suction device. On the base plate 16 is an air-

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7635919

sealed box 50 mounted by means of a lid Can be closed and in which the collecting container 17, for example a wire basket or the like, can be removed is located.

A suction tube 5I, the lower suction opening 52 of which is cut at an angle, opens into the box 50 from the front side so that its rear edge has a slight distance of e.g. approx. 2 cm from the floor, while its front edge has a distance of approx. 7 cm from the floor, i.e. the suction opening 52 is only a little larger than a tennis ball and as soon as a ball hits the suction opening, it will also be smaller Suction power sucked up in the pipe 5I and conveyed into the collecting container I7 within the box 50.

At an opening in the front wall of the box 50 is a suction fan 53 is attached, on the circumference of which air outlet slots 5 ^ are trained. In this example, an electric motor is used to drive the suction fan 53 57, which is fed by two batteries 55 provided next to one another on the platform 16. Appropriate there is a switch 58 for the suction fan 53 with the operating side of the device via a line 56, for example a handlebar 5 "in connection, so that the operator can use the suction fan without changing their location behind the device can be switched on and off at will. As soon as the suction fan 53 is switched off, the lid of the box 50 can be lifted off and the collecting container I7 can be removed will.

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The device also works with a suction fan according to FIGS. 11 and 12. The arrangements are essentially identical except for the type of suction air flow generation. This is a suction fan 60 which is driven by an internal combustion engine, for example a four-stroke engine 62, via a belt drive 61. The internal combustion engine 62 is started by a starter which can expediently be actuated from the operator's side, it being possible for the starter to be fed by a battery 6j>. An alternator, which can also be accommodated on the platform 16, can serve to charge the battery 63.

The width of the entire device can be kept small so that its proportions are suitable for use in a tennis hall or on a tennis court is adapted. The device can either be moved by hand, or the drive can be motorized be produced. Any impeller is useful in any case 2 equipped with a freewheel, so that when driving sharp right and left turns, the inner wheel does not open dragging the ground, but turning slower than the outer wheel.

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Claims (25)

Expectations 1. Device for collecting tennis balls, g e k e η η ze leans through a carriage (1) equipped with a collecting container (17) for tennis balls, on which a collecting and lifting device (l8 ;; 5Oj4l; 5I) is arranged is, which extends from the floor (A) to an upper opening of the collecting container (I7) and the tennis balls in this throws off. 2. Apparatus according to claim 1, characterized in that the collecting and lifting device (18; 30j41; 51) lying just above the floor (A) Guard rails (10) are connected upstream at the front end of the carriage (1), starting from the ground-level The inlet end of the collecting and lifting device extends outward in a V-shape. 3. Apparatus according to claim 2, characterized in that the guide rails (10) are interchangeable are attached to the carriage (1) and that each guardrail is designed to be adjustable in length. 4. Apparatus according to claim 2, characterized in that that the guardrails (10) are mounted on the carriage (1) so that they can be folded up. 5. Apparatus according to claim 4, characterized in that for folding up each guardrail (10) a manually operated cable pull (14) is used. - 22 - 6. Apparatus according to claims 1 to 5 »characterized in that as Aufsammei- and Lifting device at least one endless conveyor belt (18; 30; 41) is used, the surface of which is rubber-elastic and is structured and which cooperates with a guide plate (22; 34,35; 46,47), which with something less Distance as the tennis ball diameter is essentially parallel to one belt run, just above that Floor (A) begins and above the collecting container (17). ends. 7. Apparatus according to claim o, characterized in that that at least one conveyor belt (18; 30) around a lower drive roller (19) and an upper one The tensioning roller (20) rotates counterclockwise with the horizontal axis and that the guide plate (22; 34, 35) is assigned to the lower belt run. 8. Apparatus according to claims 6 and 7, characterized characterized in that the guide plate (34) has a pivotable lower end portion (35), which is acted upon by a spring (36) acting in the direction of the drive roller (19) that on the shaft of the Drive roller (19) a disc (39) is non-rotatably provided is, on the circumference at equal intervals curved projections (38) are formed with a the hinged end part (35) of the guide plate (34) attached arm (37) cooperate against the spring force and that a tennis ball guide (33) from the side into the distance between the conveyor belt (30) and the guide plate (34) opens. 9. Apparatus according to claim 8, characterized in that the disc (39) with the curve projections (38) is arranged between two endless conveyor belts (30) and each conveyor belt (30) is assigned a lateral tennis ball feed (33). 10. Apparatus according to claims 6 and 7 »thereby characterized in that an approximately S-shaped guide plate (22) is made rigid in one piece and cooperates with a conveyor belt (18), in which the drive roller (19) is slightly below the tennis ball diameter is arranged lying distance to the floor. 11. Apparatus according to claim 6, characterized that at least one conveyor belt (41) revolves around rollers (42, 43) with an upright axis and a belt run interacts with a guide plate (46, 47) which is angular in cross section. 12. Apparatus according to claims 1 to 11, characterized in that the drive of the Drive roller (19j42) of the conveyor belt (18j30; 41) is derived from the wheels (2) of the carriage (1). 13. Apparatus according to claims 11 and 12, characterized in that the drive transmission on the drive roller (42) with a stationary axis a bevel gear (44) with a translation of at least about 1: 1.5 is used. - 24 - 14. Apparatus according to claims 1 to 5 »characterized in that the Aufsammei- and Lifting device is designed as a screw conveyor. 15. Device according to claims 1 to 5 »thereby characterized in that the pick-up and lifting device is designed as a shovel belt conveyor. f 16. Apparatus according to claims 1 to 5 * characterized in that the Aufsammei- and \ lifting device works with a suction fan (53; 60), | that of an internal combustion or electric motor (57; 62) | is driven and sucks the tennis balls into the collecting container (17). Device according to claim 16, characterized in that the suction air flow is effective in a suction pipe (51 J , which has a suction opening (52) directed to the front, the diameter of which is slightly larger than the diameter of a tennis ball, and that the suction pipe (51) opens into an airtight closed box (50), in which the collecting container (17)> is accommodated. 18. Apparatus according to claim 17, characterized in that the suction opening (52) through forward inclined cut of the suction tube end is formed. 19. Apparatus according to claim 16, characterized in that the motors (57; 62) and the Suction fan (53; 60) on the vehicle frame in front of the Collecting container (17) are arranged. - 25 - -3, Hai 1978 20. Device according to claims 1 to 19 * thereby
characterized in that the carriage (1)
has a rigid front axle (21) and at least one rear pendulum wheel (3) and that the two front running wheels (2) of the carriage (1) are each equipped with a freewheel. 21. Apparatus according to claims 1 to 20, characterized
characterized in that the collecting and lifting device and the collecting container (17) are housed under a common cover (4) and that the cover (4) is mounted on the chassis of the carriage (1) so that it can be folded forward. 22. Device according to one or more of the preceding claims, characterized in that at least one handlebar spar at the rear end of the cover hood (5) is attached to guide the carriage (1) and that the handlebar (5) is designed as a twist grip Carries handle (6) with which the cable (14) for pivoting a guardrail (10) is in operative connection, 23. Apparatus according to claim 22, characterized in that that in the area of the handle (6) a lever mechanism (7) for triggering a lock (8) the cover (4) is attached and that the cover is swiveled up by means of spring force State is maintained. 24. Apparatus according to claims 1 to 23, characterized
characterized in that the collecting container is designed as a wire basket (I7) and is provided interchangeably on the carriage. - 26 - i51978 »« «*« ♦ «UM H w (J c * * «· rt ·» I • · «« »I ■ ι - 26 - 25. Apparatus according to claim 11, characterized in that that two adjacent conveyor belts (41) run in opposite directions to one another and a base plate (46) is provided between the two conveyor belts (41), which is one of the two inner Conveyor belt strands associated guide plate (47) carries.