DE102006001713B3 - Stone clearing and cleaning for sandy beach, involves increasing classifying by temporary overlapping of rotated spring tooth of rotor with wire mesh rods, which are laterally and shiftedly arranged in tooth - Google Patents

Abstract

Stone clearing and cleaning involves carrying soil by a rotated spring tooth (29) of a rotor (25) that is arranged parallel before wire mesh rods (30). The rods are accelerated in a direction in such a manner that the soil passes the wire mesh rods in its convey path in an unhindered manner and passes in a driving direction of a soil cleaning vehicle behind the rods. Classifying is increased by temporary overlapping of the rotated spring tooth with the rods, where the rods are laterally and shiftedly arranged in the tooth. An independent claim is also included for a device for the cleaning and clearing of stoned from soil.

Description

The The invention relates to a method for mechanical separation of oversizes from soils, in particular for cleaning and de - staining of soils according to the generic term of Claim 1 and an associated Device according to the preamble of claim 4.

such Process for the mechanical separation of oversizes from soils and the corresponding Devices are used in particular for cleaning and de-stoning of soils used. This concerns especially the cleaning of people recreational free / sandy areas, the collection of oil, tar and asphalt lumps of sandy beaches after accidents as well as the stoning agricultural and horticultural used areas. In conjunction with magnetic separators, the process continues during the eviction mine-contaminated areas applicable.

In During the summer months, visiting sandy beaches in waters is very popular. It will be the sandy beaches used intensively by many people and therefore must be in a clean and to be well-groomed. In addition, the soils of the sandy beaches are regular, mostly early in the morning cleaned before the start of bathing.

The Sandy beaches of waters are subject to a natural and man-made pollution. In the natural pollution it is sporadic, z. B. after heavy seas, to the Beach washed seagrass or algae. But even dead fish and shells can be washed up from the water, the after a short time to an additional odor nuisance to lead. Man-made pollutants include alluvial or left by the beach visitors Crates, boards, canisters, foils, bottles, beer cans or also beer mats, cigarette butts, paper handkerchiefs and Candy wrappers. additionally can the bottom of the sandy beaches, especially after ship accidents, also with oil, tar and asphalt lumps be contaminated. But not only on sandy beaches but also in agriculture plays the soil quality an important role, in this case by the nutrient content and the grain size de soil material is determined. While almost nothing grows on gravel, can on sandy soil a few low-yielding crops are cultivated. But only a mixture with the finer fractions silt and clay leads to a high income potential. In contrast, stones in the ground reduce this Yield potential, because they do not have any plant-available soil water or store soil air and thus not for soil fertility contribute. If the stones lie on the ground surface, then none of them can be found Plants grow. Furthermore is through the stones a tillage with agricultural Machines difficult. So can bigger stones damage seeding machines during sowing and reapers at harvest from combine harvesters to destroy.

The simplest form of cleaning and de-staining of soils, in particular the cleaning of sandy beaches, is still done by collecting the oversize lying on the ground by Hand, where plus sizes both can present the above soiling as well as stones. there uses the person collecting to work easier, just for small-volume oversizes, mostly an arm-extending Device with a gripper or with a tip for skewering this small-volume oversizes.

Indeed Hand washing is very time consuming. To z. B. the bottom of a Sandy beach in one available standing time window between early morning until the beginning of the To clean bathing facilities is also a large number of collecting Persons necessary.

In addition, will by collecting only the soil surface of oversize freed. The scarce below the soil surface oversizes, the z. B. at sandy beaches by the walking or running movements of the beach visitors easily the sand surface promoted can be will not be picked up. This is then the sandy beach after a short time of use in a dirty and unkempt Status. But even in agriculture, they are still decreasing Soil stones are the soil quality for the reasons mentioned above.

adversely But it is also that the surfaces to be cleaned and the quantities of oversize relatively be great can. As a result, the workload is very large.

Therefore the de-staining and cleaning of soils is mainly done by machine. So Are known from agriculture a tractor-pulled stone collection device, in which the stones lying on the field by obliquely employed in the direction of travel and equipped with impact tools rotating waves separated from the ground and in a collection container promoted become. The disadvantage, however, is that with this device only at least fist-sized stones can be separated from the ground. That's why this device is for the stoning agricultural land only limited and for the beach cleaning not at all available.

From the EP 486 053 B1 is also a driving known for cleaning the soil, which is mainly used for the cleaning of sandy areas, especially sandy beaches, sand areas for outdoor sports and sandy areas in playgrounds. The attached via a clutch to a tractor vehicle consists essentially of a vehicle frame with a spanned over several pulleys screen belt, arranged under the vehicle frame swing frame with a feed roller for receiving the soil to be cleaned and a fold-up cargo area with a collecting container. In this case, the feed roller is designed as a rotor with spring tines, brush rollers or the like. By the rotational movement of the feed roller of the soil to be cleaned is taken and given on the one hand on the screen belt. The sieve belt runs around the deflection roller and thereby transports the soil material. The soil material falls through the screen belt back to the ground and only the oversize, which have a larger grain diameter, remain on the screen belt and are transported by the orbital movement of the wire into the sump.

From the DE 197 24 753 A1 a similar device for the separation of small ammunition and personal mines is known, wherein the soil is taken up via a tiller and transported to the screen belt.

at However, the two devices is disadvantageous that the screening performance of the screen belt with increasing moisture of the soil material decreases. This leaves larger lumps of the soil material stick to the oversizes, so that's the sump supplied Material has a too high proportion of fine soil. This increases the Disposal costs.

From However, the decisive disadvantage of the two devices is that the entire soil material to be cleaned must be absorbed. First during transport on the sieve belt, the oversizes and the cleaned soil material become separated from each other. By taking the entire to be cleaned Soil material falls the dimensioning of such vehicles for floor cleaning large, because size Masses of soil have to be moved.

Furthermore, from the US 29 76 936 a device for mechanical floor cleaning, in which the floor combed by inclined in the direction of travel and against the ground, diagonally arranged sieve bars on oversize and the retained by the sieve bars oversize are transported by a conveyor belt in a sump.

From The disadvantage is that the filling volume of the collecting is relatively small. This requires the cleaning of the soil for emptying of the collection container often interrupted, leaving the surface to be cleaned and the collection container is emptied in a foreign matter collecting station. This leads to a increased workload and to an extension of the labor input when cleaning the floor.

From Disadvantage is also that the recorded oversizes relatively high above the Floor need to be raised to go to the sump reach. It can the oversizes due to weather conditions, such as z. B. Wind, from the screw conveyor be removed, so that oversizes again combed through the sieve bars and through the screw conveyor must be transported. That causes unnecessary Additional costs.

Also is disadvantageous that through the sieve bars the ground only in the direction of travel comb through the device becomes and thereby the intermediate spaces untouched between the sieve bars stay. As a result, only larger quantities are detected with this device, which are located directly in front of at least one sieve bar. Oversizes the are aligned in the direction of travel of the device and with its narrow Side through the gaps between the sieve bars are passed through the device not recorded.

From But a particular disadvantage is mainly that the sieve bars at damp sand frequently can clog and then a cleaning of the soil is not possible. That's it Method of machine cleaning of the soil for normal use for cleaning sandy beaches in waters, especially the coastal beaches, but also for the depletion of agricultural land unsuitable.

According to PCT-WO 91 / 17318A1 is a mobile plant for cleaning sandy areas, in the equipped by a rotor with blades of the sand in the Deep combed and the soil taken up is classified in two stages.

Of the Disadvantage of this plant is that the sand surface only is cleaned in strips. About that In addition, the device is repeatedly prone to clogging.

The invention is therefore based on the object to develop a generic method and a corresponding apparatus for the mechanical separation of oversizes from soils, in particular for cleaning and de-staining of soils, on the one hand only the outsized from the soil material to machine sizes On the other hand, when wet soil material is not clogged and its Siebleistung does not decrease with increasing moisture of the soil material.

the method, This object is achieved by the characterizing features of the claim 1 solved. Expedient embodiments emerge from the dependent claims 2 and 3. With respect to the device for carrying out the method, this Problem solved by the characterizing features of claim 4 and expediently by the dependent claims 5 to 10 configured.

The new methods for the mechanical separation of oversizes from soils, especially for cleaning and depletion of soils and eliminate the corresponding device for carrying out the method the mentioned disadvantages of the prior art.

Advantageous in the application of the method according to the invention it is that the soil to be cleaned and to be stoned by rotating Spring tines recorded and accelerated in the direction of sieve bars so is that on the one hand the plus sizes against in the direction of rotation subsequently arranged sieve bars depressed become. In the process, the oversizes consisting of clumped soil components are crushed. The not further crushable clumped soil shares are with the remaining oversizes in alignment the sieve bars are flung from the ground against an upper deflector, causing the oversizes in their trajectories deflected and bounce on a cross conveyor and subsequently abandoned on the longitudinal conveyor belt become. On the other hand, the cleaned or pitted soil happens as a smaller fraction in its trajectory unhindered the sieve bars and falls in the direction of travel of the floor cleaning vehicle behind the sieve bars back on the ground. Procedural, it is also advantageous if the classification by a temporary overlapping of the rotating ones Spring tines reinforced with the sieve bars, where the sieve bars protruding into the orbit of the spring tines and laterally offset are arranged to these. This will become part of the soil share between spring tines and sieve bars crushed and temporarily jammed, whereby on the one hand clumped soil shares easier crushed and on the other hand, the not further crushable clumped soil portions as well as the oversizes with the Addition of the resulting forces from the peripheral speed of the rotor and the residual stress the spring tines are thrown upwards.

Farther it is advantageous if the arrangement of the rotating spring tines with the sieve bars on the one hand parallel to the floor surface and on the other, at an angle to the direction of travel of the floor cleaning vehicle is because thereby the classification is strengthened and the entire crossing Floor surface through the rotating spring tines is received.

the device side It is advantageous if a rotor in parallel in front of the sieve bars arranged with spring tines, which is the same direction of rotation as the Has wheels and whose peripheral speed is greater than that of the wheels, because thereby the soil to be cleaned and to be pitted by the spring tines, independently is received by the driving speed of the device.

Advantageous it is also when the immersion depths of the spring tines and the sieve bars are the same in the ground to be cleaned and ground and preferably each 50 mm, the angle between the Rotation axis of the rotor and the axes is 30 ° and the spaces between the Sieve bars on the screen frame and the spaces between the spring tines each 20 mm on the rotor. As a result, the rotational paths overlap the spring tines in the ground, leaving the ground over the entire driving width is recorded.

there it is advantageous if the immersion depths of the spring tines and the sieve bars over at least a support wheel is adjustable and thereby adapted to the respective requirements can. Here is the Abstützrad in its size and profile width designed so that the support wheel little sinks.

From it is particularly advantageous if the sieve bars through a sieve frame be worn, with the sieve frame with the sieve bars against a Rotor frame of the rotor is articulated and resiliently mounted. Thereby the sieve bars are hidden from the ground, invisible Obstacles and stones that can not be moved by the spring tines, Groynes, stumps, boulders protected because the sieve bars are moved backwards and upwards when hitting them become.

From It is also advantageous if the sieve bars in the circular path of the spring tines protrude while the sieve bars laterally offset to the spring tines are arranged. As a result, the feather tines wander with everyone Rotation of the rotor the spaces between the sieve bars, being the classification effect increased becomes.

It is also advantageous if laterally displaced successively the longitudinal conveyor belt for filling the transport container, the cross conveyor belts for feeding the longitudinal conveyor belt and the rotor in operation and in reverse order except Be be driven, because it ensures a secure emptying of all necessary sub-functions and transport routes of the device.

From Advantage is also when the transport container is a commercial Big-bag is, with an empty transport container, stored space-saving and be easily attached by the staff to a container receptacle can. Then the transport container is behind the longitudinal conveyor belt such that the above the longitudinal conveyor belt transported oversize in the middle in the transport container fall. The transport container is by loops on the container receptacle safely hung, so that a lateral slipping or moving the transport container is not possible is.

Advantageous is also when the central control of the floor cleaning vehicle from the raised Driver's cab takes place and this in the direction of travel at the left front side of the vehicle frame is arranged elevated. Thereby is thus, in contrast to the drawn machine, a simple control all functions and a better overview possible.

The Invention is based on an embodiment be explained in more detail. To show:

1 a schematic representation of a floor cleaning vehicle in a side view,

2 a schematic representation of the floor cleaning vehicle in a plan view,

3 a schematic representation of a lifting device of a transport container in a first delivery and in a second delivery in a side view,

4 a schematic representation of a floor cleaning device in a side view and

5 a schematic sectional view of the floor cleaning device in the side intention.

The device according to the invention for carrying out the mechanical floor cleaning method consists, according to the 1 and 2 , from a floor cleaning vehicle 1 and a transport container for receiving the removing oversizes 2 ,

The floor cleaning vehicle 1 owns a vehicle frame 3 with a direction of travel on the left front side of the vehicle frame 3 elevated arranged driver's cab 4 and one in the rear of the vehicle frame 3 arranged vehicle body 5 , Here is the vehicle frame 3 by two driven and sprung axles 6 with the wheels 7 . 8th movable, of which the front wheels 7 steerable and rear wheels 8th are rigid.

The vehicle construction 5 includes a support arm foot 9 with a carrier and transport arm 10 and a lifting device 11 for the transport container 2 ,

The lifting device 11 exists, gem. of the 3 , on the one hand, via a joint 12 on the vehicle frame 3 fixed lifting arm 13 , which is pivotable about a hydraulic drive, not shown in the figure. On the other hand, the lifting arm 13 with a container receptacle 14 equipped with which the transport container 2 non-positively with the lifting arm 13 is connectable. The length of the lifting arm 13 is dimensioned such that the transport container 2 in a display of the lifting arm 13 on the vehicle frame 3 and in the other display of the lifting arm 13 in the direction of travel behind the floor cleaning vehicle 1 can be turned off. Here is the transport container 2 in its outer contour, as a so-called. Big-bag flexible, leaving empty unused transport containers 2 ' saves space on the vehicle frame 3 next to the vehicle body 5 can be carried.

Also rigid on the vehicle frame 3 attached is the Trägerarmfuß 9 , being over a joint 15 the carrier and transport arm 10 opposite the carrier arm foot 9 and thus also with respect to the vehicle frame 3 is mounted in height and laterally pivotable. This is the carrier and transport arm 10 in the direction of travel of the floor cleaning vehicle 1 right next to the driver's cab 4 and on the one hand from the carrier arm foot 9 to the ground in front of the floor cleaning vehicle 1 and on the other hand, from the carrier arm foot 9 to above the transport container 2 , Over the entire length of the carrier and transport arm 10 runs over two pulleys 16 an endless longitudinal conveyor belt 17 , wherein the upper deflection roller 16 is hydraulically driven.

At the ground-level outer end of the carrier and transport arm 10 is frontally a floor cleaning device 18 with two height-adjustable support wheels 19 arranged.

The floor cleaning device 18 exists, gem. of the 4 and 5 , from a screening and classification unit 20 and two across the entire width of the screening and classifying unit 20 running one behind the other and on the carrier and transport arm 10 detaching hydraulically driven cross conveyor belts 21 , Above the screening and classification unit 20 and the cross conveyor belts 21 is a bent baffle 22 arranged such that through the sieve and classifying unit 20 thrown over sizes against the baffle 22 bounce and from this to the cross conveyor belts 21 be redirected.

The sieving and classifying unit 20 consists of a sieve frame 23 and a rotor frame 24 with an apron 24 ' and a rotor 25 , The rotor 25 , which is driven by a hydraulic motor, not shown in the figures, consists of six angle profiles 26 , in their length almost the entire width of the screening and classification unit 20 occupy and rotationally symmetrical between two edge discs 27 each with a stub shaft 28 are arranged. Over the circumference of the rotor 25 are radially outwardly facing spring tines 29 arranged.

The sieve frame 23 is to the ground and in the direction of travel of the floor cleaning vehicle 1 directed obliquely and parallel to the rotor 25 arranged. Inside the sieve frame 23 There are several sieve bars horizontally 30 in the circular path of the spring tines 29 protrude. Here are the sieve bars 30 so laterally offset to the spring tines 29 arranged at the rotation of the rotor 25 one spring tine each 29 through the space between two adjacent sieve bars 30 fits through.

The height of the floor cleaning device 18 above the ground to be cleaned is above the support wheels 19 adjustable, with the floor cleaning device 18 proportionally each with a spindle 31 with a winch 32 on a support wheel 19 supported above the ground. In this case, the adjusted height of the floor cleaning device depends 18 according to the immersion depth of the sieve bars 30 in the soil to be cleaned, with the lower side of the screen frame 23 in a horizontal plane coinciding with the rotation of the rotor 24 from the spring tines 29 resulting lowest point. Then the immersion depth of the sieve bars corresponds 30 and the spring tines 29 the desired soil cleaning depth.

The floor cleaning device 18 is so inclined to the vehicle frame 3 arranged that the angle between the axes of rotation of the rotor 25 and the axles 6 is about 30 ° and thereby the rotational paths of the spring tines 29 in the ground during the movement of the floor cleaning vehicle 1 overlap.

To damage the floor cleaning device 18 by striking against buried in the ground and by the spring tines 29 To avoid immovable stones, groynes, stumps or boulders is the lower side of the screen frame 23 additionally reinforced trained and the entire screen frame 23 opposite the rotor frame 24 articulated and spring-mounted. This allows the screen frame 23 when hitting non-movable stones against the direction of travel of the floor cleaning vehicle 1 and dodge up. For the same reason spring tines instead of rigid tines 29 with a spring part 33 used.

For the use of the device for the mechanical separation of oversizes from soils, especially for cleaning and de-staining of soils is the operational readiness of the floor cleaning vehicle 1 manufacture by the floor cleaning vehicle 1 drove in front of the area to be cleaned and an empty transport container 2 ' to the container receptacle 14 the lifting device 11 is appended. Subsequently, the desired soil cleaning depth with the help of the hand crank 32 set and the carrier and carry arm 10 with the floor cleaning device 18 aligned to a central position. Here, a soil cleaning depth of 5 cm is to be preferred, since this depth coincides with the usual seedbed depth in agriculture and beach cleaning depth of the tourism industry.

For the processing of the bottom surface are laterally offset successively the longitudinal conveyor belt 17 for filling the transport container 2 , the cross conveyor belts 21 for feeding the longitudinal conveyor belt 21 and the rotor 25 put into operation. Subsequently, via the carrier and transport arm 10 the floor cleaning device 18 on support wheel 19 put and the floor cleaning vehicle 1 set in motion.

In this case, the peripheral speed of the rotor decreases 25 is with its radially outwardly facing spring tines 19 to, where the peripheral speed of the rotor 25 always greater than the ground speed of the floor cleaning vehicle 1 is. As a result, the recorded soil material is ejected obliquely to the rear. But since the sieve bars 32 the circular path of the spring tines 19 cut while the spring tines 19 the sieve bars 32 can happen unhindered, because in the

Free space between the spring tines 19 fixed sieve bars 32 take the spring tines 19 due to their previous soil passage with soil material, which also to the sieve bars 32 arrives. As far as the recorded soil material smaller than space between the sieve bars 32 is, it passes this and falls as a classified material behind the floor cleaning device 18 back to the ground.

The absorbed soil material, equal to or greater than the space between the sieve bars 32 is through the spring tines 29 on the sieve bars 32 spun. Here are ver crushed clumped soil. The oversizes located in the decaying ground portions are detected by the spring tines and together with the remaining non-crushable oversize tangentially upwards against the baffle 22 hurled, bounce off this and get onto the cross conveyor 21 , The oversized quantities collected in this way are transported via the longitudinal conveyor belt 17 in the transport container 2 transported.

Is the transport container 2 completely filled, the journey is interrupted. The transport container 2 is lowered hydraulically to the rear on the cleaned soil and the container receptacle 14 becomes by hand from the transport container 2 solved. After swinging back the lifting device 11 then becomes an empty transport container by hand again 2 ' in the container receptacle 14 mounted and then the journey continued.

If within the working area of the floor cleaning device 18 insurmountable obstacles are, this by the lateral pivoting of the carrier and transport arm 10 with the floor cleaning device 18 dodged. This swivel range is 0.5 m to the right and left, deviating from the center. If this swiveling range is not sufficient, then these obstacles will be met by the floor cleaning vehicle 1 bypassed.

• – Abschalten des Rotors,
• – Abschalten der Querförderbänder, sobald sie leergelaufen sind,
• – Abschalten des Längsförderbandes, sobald es leergelaufen ist,
• – Absetzen des evt. noch nicht vollständig gefüllten Big-Bags und

und anschließend Verlassen der gereinigten Bodenfläche.Working with the floor cleaning device 18 is terminated by switching off all moving assemblies in sequence from front to back:

• Switching off the rotor,
• - switching off the cross conveyor belts as soon as they have run empty,
• - switching off the longitudinal conveyor belt as soon as it has run dry,
• - Settling of the possibly not yet completely filled Big-Bags and

and then leaving the cleaned floor area.

1

Floor cleaning vehicle

2, 2 '

transport container

3

vehicle frame

4

cab

5

vehicle body

6

axis

7

front

8th

rear wheel

9

Trägerarmfuß

10

Carrier and transport arm

11

hoist

12

joint

13

lifting arm

14

container receptacle

15

joint

16

idler pulley

17

Longitudinal conveyor belt

18

Floor cleaning device

14

support wheel

20

Scree- and classifying unit

21

Cross conveyor belt

22

baffle

23

screen frame

24 24 '

rotor frame with fender

25

rotor

26

angle section

27

edge disc

28

stub shaft

29

tines

30

Siebstange

31

spindle

32

winch

33

spring part

Claims (10)

Process for the mechanical separation of oversizes from soils, in particular for the purification and depletion of soils; in which several parallel, inclined sieve bars ( 30 ) are moved through a floor to be cleaned or to be grounded, whereby through the sieve bars ( 30 ) the oversizes are screened out of the soil to be cleaned or ground and these oversizes are conveyed over a longitudinal conveyor belt ( 17 ) in a transport container ( 2 ) and collected there, characterized in that the floor to be cleaned or to be grounded by rotating spring tines ( 29 ) one in front of the sieve bars ( 30 ) arranged rotor ( 25 ) and towards Siebstangen ( 30 ) is accelerated in such a way that - on the one hand the oversizes against the sieve bars subsequently arranged in the direction of rotation ( 30 ), whereby oversizes from clumped soil fractions are comminuted, and the not further crushable oversize in alignment of the sieve bars ( 30 ) from the ground against an upper baffle ( 22 ), whereby the oversizes in their trajectories deflected and on the longitudinal conveyor belt ( 17 ) and - on the other hand, the cleaned or pitted soil in its trajectory the sieve bars ( 30 ) passes unhindered and in the direction of travel of the floor cleaning vehicle ( 1 ) behind the sieve bars ( 30 ) falls back to the ground, - and that the classification by a temporary overlap of the rotating spring tines ( 29 ) with the sieve bars ( 30 ), the sieve bars ( 30 ) laterally offset to these ( 29 ) are arranged. A method according to claim 1, characterized in that the deflected in their trajectories outsize by a cross conveyor belt ( 21 ) and on the longitudinal conveyor belt ( 17 ) are abandoned. A method according to claim 2, characterized in that the classification by an arrangement of the rotating spring tines ( 29 ) with the sieve bars ( 30 ), wherein the axis of the rotor ( 25 ) on the one hand parallel to the floor surface and on the other hand obliquely to the direction of travel of the floor cleaning vehicle ( 1 ) runs. Device for the mechanical separation of oversizes from soils, in particular for the cleaning and depletion of soils, consisting of a wheeled ( 7 . 8th ) driving floor cleaning vehicle ( 1 ) with a plurality of inclined through the sieve to be cleaned or grounded to be cleaned ( 30 ) and one for receiving the oversized sifted oversize transport container ( 2 ), whereby between the sieve bars ( 30 ) and the transport container ( 2 ) a longitudinal conveyor belt ( 17 ), characterized in that in parallel in front of the sieve bars ( 30 ) a rotor ( 25 ) with spring tines ( 29 ) is arranged, the same direction of rotation as the wheels ( 7 . 8th ) and whose peripheral speed is greater than that of the wheels ( 7 . 8th ), wherein the immersion depths of the spring tines ( 29 ) and the sieve bars ( 30 ) determine the cleaning and depletion depth in the Bode that above the sieve bars ( 30 ) a baffle ( 22 ) is arranged such that by the spring tines ( 29 ) oversizes received in the direction of the sieve bars ( 30 ) up against the baffle ( 22 ), deflected and transferred to the longitudinal conveyor belt ( 17 ) and that the spaces between the sieve bars ( 30 ) and the spaces between the spring tines ( 29 ), the sieve bars ( 30 ) and the spring tines ( 29 ) are arranged laterally offset from one another. Apparatus according to claim 4, characterized in that parallel behind the sieve bars ( 30 ) at least, a cross conveyor ( 21 ), which by the baffle ( 22 ) collected deflected oversize. Apparatus according to claim 4 or 5, characterized in that the angle between the axis of rotation of the rotor ( 25 ) and the wheel axles ( 6 ) Is 30 °. Device according to one of claims 4 to 6, characterized in that the sieve bars ( 30 ) in the circular path of the spring tines ( 29 protrude). Device according to one of claims 4 to 7, characterized in that the sieve bars ( 30 ) through a sieve frame ( 23 ), the screen frame ( 23 ) with the sieve bars ( 30 ) relative to a rotor frame ( 24 ) of the rotor ( 25 ) is hinged and spring-mounted. Device according to one of claims 4 to 8, characterized in that the immersion depths of the spring tines ( 29 ) and the sieve bars ( 30 ) in the soil to be cleaned or ground, and at least one support wheel ( 19 ) are adjustable. Apparatus according to claim 9, characterized in that the spaces between the sieve bars ( 30 ) and the spaces between the spring tines ( 29 ) on the rotor ( 25 ) each 20 mm and the immersion depths of the sieve bars ( 30 ) and the spring tines ( 29 ) in the soil to be cleaned and stoned each 50 mm.