EP1630301A1 - Method and apparatus for earth working - Google Patents

Abstract

The method involves suspending a supporting cable on a soil working device that is lowered from a supporting device and introduced into ground. The soil working device is raised from the ground by a supporting cable that is connected to a holding frame. The soil working device part of the cable is lowered or raised for introducing a tensile force via a holding frame (10) into the ground. An independent claim is also included for an apparatus for working a soil, particularly for performing a soil working method.

Description

The invention relates to a method for tillage in which a tillage device suspended from at least one carrying cable is lowered by a carrying device and introduced into the ground and the tillage device is then pulled out of the ground by means of the carrying cable. The invention further relates to a device for tillage with a harrow, in particular a milling cutter, which is for the removal of soil by means of at least one support cable to a support means in the soil can be introduced.

A generic method and a generic device are known for example from DE 41 19 212 A1. This document describes a designed as a trench wall tiller cultivation machine, which is suspended on a support cable to a boom of a car. By means of this support rope, the trench wall cutter is lowered to form a Frässchlitzes in the ground and pulled out of the created Frässchlitz.

Another trench wall milling method is known from DE 41 41 629 C2. In this so-called single-phase method, the cutting slot is supported during drilling by a self-hardening suspension, which hardens after pulling the router to the slot wall. If there are unwanted delays when sinking the slot in the single-phase process, there is a risk of partial hardening of the suspension while the trench wall cutter is still in the slot. To pull the trench wall cutter then comparatively large tensile forces be applied. The carrying device of the trench wall cutter must be carried out correspondingly complex.

DE 39 05 463 A1 discloses a further method for producing slot walls. According to this known method, a slot is first milled by means of a trench cutter. After reaching a desired final depth of the milling width of the trench wall cutter is increased by moving apart of their cutting wheels. Subsequently, the trench wall cutter is pulled while milling the side walls of the slot. Also in this known method, the forces to be applied for pulling the trench wall cutter are relatively large. As a result, the carrying device carrying the trench wall cutter has to be made comparatively complicated.

The object of the invention is to provide a method and a device for soil cultivation with a harrow, which allow a comparatively simple and inexpensive design of the support means of the harrow.

This object is achieved by a method for tillage with the features of claim 1 and a device for tillage with the features of claim 8. Preferred embodiments are given in the respective dependent claims.

The inventive method for tillage is characterized in that in addition to the support means a support frame is arranged, that the support cable is connected to the support frame, and that when lowering and / or pulling the tillage device, a part of the cable pulling force is introduced via the holding frame in the ground.

A basic idea of the invention can be seen not to hang the harrow alone on the support means, but in addition to the support means to provide a support frame on which the harrow as well is suspended. As a result, the tensile force of the harrow is divided on the support means and the additional support frame and thus relieves the support means. As a result, this can be carried out particularly easily and inexpensively.

In principle, the soil cultivating device can be any device which is lowered to change the soil condition into the ground, in particular into a trench or slot arranged therein, and is subsequently pulled out again. For example, the tillage implement may be a milling device, a drilling device, but also a suspension exchange plate that is inserted into a slot to exchange various types of suspension. The carrying device can be, for example, a crane or a construction trailer.

According to the invention, the harrow is on the support cable both with the support device and with the support frame in tensile strength. The support cable thus runs on the harrow at least twice along the trench to the ground surface. In contrast to the previously known direct suspension of the harrow on the supporting cable, the carrying device is loaded only with half the pulling force in this two-stranded reeving, whereas the remaining traction over the support frame is supported on the ground. Amongst other things, the tensile force can be composed of the own weight of the soil tillage implement and the feed forces of tillage tools in the ground, in particular peripheral forces of cutting wheels. The method according to the invention is particularly suitable when tilling is to take place while the tillage implement is being pulled, ie when the feed forces of the tilling tools have to be applied while pulling. In this case, the feed forces add to the weight of the mill and are not applied by the weight force. In addition to a two-stranded Einscherung in the suspension cable can be provided according to the invention, a multi-stranded reeving.

To relieve the carrying device, the holding frame is suitably provided at a distance from this carrying device, i. a connection between the support frame and the soil cultivation device consists only of the support cable and optionally via control and supply lines. On the support means but can also be provided a settling device for depositing the support frame on the ground surface. If the support frame is in communication with the support, this connection is suitably flexible, i. not rigidly formed, so that no tensile forces of the soil cultivating device are transmitted via this connection.

For a particularly effective introduction of force on the support frame in the ground of this is preferably placed directly on the soil surface, which optionally can still be anchored to the ground. The introduction of force can be further improved by placing the support frame on concrete and hardened floor elements, in particular on hardened primary panels, i. Primary slats of the diaphragm wall. The support frame, which may also be referred to as a storage frame, subframe and / or set-down frame, is suitably located near the top of the trench or slot and suitably completely circumscribes the opening of the slot in the ground. The subframe can also serve to guide the harrow, in particular at the time when it is introduced into the ground.

In principle, the carrying cable can be connected to the holding frame in various ways. For example, at least one deflection roller can be provided on the holding frame, over which the carrying cable is guided. In this case, the carrying cable is thus displaceable, ie free, connected to the holding frame. This is particularly advantageous if a three- or multi-strand reeving of the soil cultivation device in Supporting cable is provided. The support cable can then preferably fixed end tensile strength on the harrow. It is particularly advantageous, however, that the supporting cable is fastened to the holding frame at the end in a tensile strength. For this purpose, for example, a loop may be provided at the end of the rope, which is hooked into a pin on the support frame. The carrying cable can alternatively or additionally be drummed on a rope drum provided on the holding frame. The end attachment of the rope to the support frame can be provided in particular in connection with a two-stranded shearing of the harrow, which requires a particularly low design effort.

According to the invention, the carrying cable is suitably guided freely on the soil cultivation device, so that only one single winching device, in particular on the carrying device, is required for lowering and pulling this device. To reduce the wearing rope wear, it is particularly advantageous that the soil cultivation device is suspended by means of at least one deflection roller arranged thereon in the supporting cable. For a multi-strand support cable guide and several pulleys can be provided on the harrow.

A particularly advantageous embodiment of the method according to the invention is characterized in that the holding frame is placed on the ground surface during lowering of the harrow and is taken from the ground with the harrow and pulled when pulling out of the harrow. According to this embodiment, the support frame is thus connected directly to the harrow when this device is in the pulled state out of the ground. The holding frame can then be offset and positioned by the carrying device together with the soil cultivation device, so that no additional support means for the holding frame is required. When lowering the soil cultivation device, however, the holding frame arranged thereon is placed on the soil surface and remains at the further sinking of the soil cultivation device back there. During the subsequent extraction of the soil tillage implement from the ground of the holding frame is taken again by the harrow and can now be re-added together with this. In order to realize this embodiment, the soil cultivating device suitably has a driving device which fixes the holding frame when the soil cultivating device moves past the cultivating device. Since, according to this embodiment, no independent support means for the support frame is required, the process costs can be further reduced.

It is particularly advantageous that a soil cultivation cross section of the cultivator is changed in the soil, in particular before pulling the cultivator. For this purpose, for example, cutting wheels or other tillage tools can be moved on the harrow. In this embodiment, the soil is advantageously processed only when pulling the harrow, in particular processed. Due to the multiple suspension of the harrow, both on the support device and the support frame in the process control according to the invention, the tensile forces occurring in this embodiment can be particularly well absorbed. By suitable choice of tillage cross sections, the tillage implement can be lowered, in particular initially without tillage in a trench otherwise already made.

It is also particularly advantageous that the harrow is designed as a milling cutter, in particular for milling off the side walls of a slot in the ground. The side walls can be milled on its entire width or even only on a part of its width, in particular profiled. As a result, according to the invention, there is a particularly large variety of shapes of the slots in the ground.

A further preferred embodiment of the method is provided in that the tillage implement is introduced into a secondary slot, the at least one cured Primary panel, in particular adjacent to two cured primary panels, and that the primary panel is milled with the harrow, in particular profiled. According to this embodiment, primary slots are first prepared in the ground in a first operation and these filled with hardenable suspension and cured to form primary panels, which can also be referred to as slit wall slats. Then secondary slots are made in the ground, which adjoin the primary panels and in particular are arranged between two cured primary panels. To form a continuous diaphragm wall, the secondary slots can then be filled with curable suspension and cured. By milling the primary panels according to the invention during the creation of the secondary slots, suspension cakes, loams and / or other inhomogeneities present at the boundary surfaces of the primary panels can be removed and thus a particularly dense diaphragm wall can be created. In particular, in the manufacture of the secondary slot, at least one, preferably both primary panels can be milled in, so that the joint tightness between the primary panels and the secondary panels to be created in the secondary slots is increased. Since according to this preferred embodiment, the joints between the primary panels and the secondary panels are processed, the method can also be referred to as Fugenfräsverfahren and the soil tillage implement used for this purpose also as a joint cutter. The secondary slot into which the harrow is introduced may be created with the harrow itself or through another trench wall device.

A basic idea of the device according to the invention is that a holding frame is provided in addition to the carrying device, and that the carrying rope is connected to the holding frame, so that at least when pulling the soil cultivation device, a part of the tensile force is introduced via the holding frame in the ground. The device according to the invention is in particular for carrying out the method according to the invention suitable, which can achieve the advantages described in connection with the method.

In principle, it is possible to attach the rope end of the suspension cable directly to the support frame. For this purpose, for example, be provided at the end of the rope an eyelet which is hooked into a hook or a pin on the support frame. In this case, the length of the support rope is fixed with respect to the support frame and the free rope length is determined solely by a winch device on the support device. However, it is particularly preferred that the holding frame has at least one driven cable drum for tumbling the carrying cable. In this case, the free rope length can also be changed by operating the cable drum of the holding frame. This embodiment is particularly advantageous if the harrow is to be drained to very great depths. When the tillage implement is pulled, the carrying cable can be picked up by the cable drum on the holding frame as well as by the winch device on the carrying device, so that a winch device with comparatively low absorption capacity can be used, which as such is comparatively inexpensive. By simultaneously pressing the cable drum on the support frame and the winch device particularly high tensile forces can be generated beyond. If a cable drum is provided, the carrying cable is suitably fastened at the end to this cable drum.

A particularly useful development of the device according to the invention is that a tiller device for taking along the holding frame when pulling out of the soil cultivation device from the ground is provided on the harrow. This makes it possible that the holding frame, as described in connection with the method, is placed on the ground surface when lowering the tillage device and taken when removing the harrow from the ground with the harrow and lifted. The entrainment device can, for example have at least one stop, which corresponds to a corresponding stop on the support frame.

According to the invention it can be provided that the holding frame has a passage opening for receiving and / or guiding the soil cultivation device. Suitably, the soil tillage implement passes out of the ground through the through hole when it is pulled out and takes the holding frame with the further lifting. After discontinuation of the tillage device together with the holding frame on the surface of the earth, the through hole can serve to guide the harrow on further drilling. For this purpose, the inner cross section of the passage opening advantageously corresponds approximately to the outer cross section of the soil cultivation device, in particular its Fräsrahmens.

For particularly simple milling of the side walls of a slot, in particular for milling adjacent primary panels, it is advantageous that the harrow has at least two rotatably mounted cutting wheels and an adjusting device, with which the distance of the axes of rotation of the two cutting wheels is adjustable. The axes of rotation of the two cutting wheels are suitably aligned at least approximately parallel to each other. The adjusting device may in particular have a toggle mechanism.

It is also particularly advantageous that the harrow and / or the holding frame, in particular with regard to the support cable guide, are mirror-symmetrical, wherein a plane of symmetry preferably runs approximately parallel to the axes of rotation of the cutting wheels. Suitably, two support cables are provided, both of which are performed in the same way on the harrow and the support frame. But it can also be provided a single support cable, which is guided at its two ends of the rope on the harrow and / or on the support frame, and which is arranged in the middle of the rope on the support means. The at least one carrying cable suitably extends outside the plane of symmetry.

Fig. 1

Eine Frontansicht einer Vorrichtung zur Bodenbearbeitung mit einem als Fräse ausgebildeten Bodenbearbeitungsgerät bei gezogener Fräse gemäß einem ersten Ausführungsbeispiel;

Fig. 2

eine Seitenansicht der Vorrichtung aus Fig. 1;

Fig. 3

einen Halterahmen der Vorrichtung aus Fig. 1 bei herabgelassener Fräse in Frontansicht;

Fig. 4

eine Frontansicht der Fräse der Vorrichtung aus Fig. 1;

Fig. 5

eine Seitenansicht der Fräse der Vorrichtung aus Fig. 1;

Fig. 6

eine Frontansicht einer Vorrichtung zur Bodenbearbeitung mit einem als Fräse ausgebildeten Bodenbearbeitungsgerät bei gezogener Fräse gemäß einem zweiten Ausführungsbeispiel;

Fig. 7

eine Seitenansicht der Vorrichtung aus Fig. 6;

Fig. 8

eine Frontansicht eines Halterahmens der Vorrichtung aus Fig. 6 bei herabgelassener Fräse;

Fig. 9

eine Frontansicht der Fräse aus Fig. 6;

Fig. 10

eine Draufsicht der Vorrichtung aus Fig. 6;

Fig. 11 bis 14

verschiedene Verfahrensstadien bei der Durchführung eines Verfahrens zur Bodenbearbeitung; und

Fig. 15 und 16

Fräsquerschnitte verschiedener als Fräse ausgebildeter Bodenbearbeitungsgeräte.

The invention will be explained in more detail with reference to preferred embodiments, which are illustrated in the figures. In the figures show schematically:

Fig. 1

A front view of a device for soil cultivation with a trained as a tiller cultivator with pulled tiller according to a first embodiment;

Fig. 2

a side view of the device of Fig. 1;

Fig. 3

a holding frame of the device of Figure 1 with lowered cutter in front view.

Fig. 4

a front view of the cutter of the device of Fig. 1;

Fig. 5

a side view of the cutter of the device of Fig. 1;

Fig. 6

a front view of a device for tillage with a trained as a tiller cultivator with pulled tiller according to a second embodiment;

Fig. 7

a side view of the device of Fig. 6;

Fig. 8

a front view of a holding frame of the device of Figure 6 with lowered cutter.

Fig. 9

a front view of the mill of FIG. 6;

Fig. 10

a plan view of the device of FIG. 6;

Fig. 11 to 14

different process stages in the implementation of a method for tillage; and

FIGS. 15 and 16

Milling cross-sections of various tillage equipment designed as a milling machine.

Components which act in the same way are identified by the same reference numerals in the figures.

A first embodiment of a device for tillage is shown in Figs. 1 to 5. The device has a carrying device 70, to which a tiller 20, which is designed as a tiller 20, is suspended via two carrying cables 4, 4 '. The carrying device has a crane boom 72 which is pivotably mounted on a trailer 73. To operate the support cables 4, 4 'is on the trailer a winch device with two winches 74, 74' are arranged, the winch 74 'is shown only broken. Of the cable winches 74, 74 'are the support cables 4, 4' guided on the crane boom 72 to guide rollers 76 which are arranged on the head of the crane boom 72. The support cables 4, 4 'are guided around these guide rollers 76 and run from there to the crane boom 72 along the cutter 20. At the winch device, the carrying cables 4, 4' are connected to the carrying device 70.

The milling cutter 20 has a milling frame 22, on which in a lower region at the same height and with parallel axes of rotation, two deflection rollers 24, 24 'are mounted. To these pulleys 24, 24 'are guided by the pulleys 76 of the support means 70 almost vertically downwardly extending support cables 4, 4'. Following the deflection rollers 24, 24 'of the milling frame 22, the support cables 4, 4' extend upward again to a holding frame 10, to which they are attached at the end. For this purpose, the support cables 4, 4 'end loops 54 which are mounted in bolts 55 in an upper region of the support frame 10.

1 and 2 it can be seen, the support frame 10 is taken from the cutter frame 22 of the cutter 20 and raised when the cutter 20 is pulled out of the ground. For this purpose points the milling cutter 20 in the lower region of the milling frame 22 has a driving device with stops which correspond to stops on the holding frame 10. If, however, the milling cutter 20 is lowered into a slot 80 in the ground, the holding frame 10 stands, as shown in FIG. 3, on the ground surface and remains on the ground when the milling cutter 20 is lowered in the region of the upper edge of the slot 80. Since the support cables 4, 4 'are attached to both the support means 70 and the support frame 10, about half of the tensile force of the mill 20 is received by the support frame 10 as soon as the support frame 10 rests on the ground. As a result, the rope tension in the support cables 4, 4 'and the load of the support means 70, in particular the winches 74, 74', when lowering and pulling the mill 20 is reduced.

The holding frame 10 has a cage-like construction and has a passage opening 11 centrally for receiving the milling frame 22. Both the milling frame 20 and the passage opening 11 are formed with an approximately rectangular cross-section. The holding frame 10 has individual lattice struts 58, which surround the cutter 20 in the pulled-out state. In addition, the holding frame 10 on its upper side two projections 59, on which the bolts 55 for fixing the support cables 4, 4 'are arranged. In order to prevent friction of the guided through the through hole 11 supporting cables 4, 4 'on the walls of the slot 80, the projections 59 protrude with the bolt 55 in the cross section of the slot 80 into it.

The milling frame 22 has an inverted U-shaped outer frame 36, the legs of which are supported by horizontally extending struts 38, 39 and obliquely extending struts 37. On the bottom side of the obliquely extending struts 37, the milling frame 22 has a horizontally extending support 25, on which end the two deflection rollers 24, 24 'are mounted. On the outside of the legs of the outer frame 36, frontally on the cutter frame 22 surface guide elements 34 are provided which extend vertically along the cutter frame 22 along and support it on the walls of the slot 80.

The milling cutter 20 has two cutting wheels 41, 41 ', which are rotatably mounted about parallel axes of rotation 43, 43'. The cutting wheels 41, 41 'are formed as Fräsradpaare and each have two Einzelfräsräder 48, 49. The Einzelfräsräder 48, 49 of the cutting wheel 41 'are mounted on a bearing plate 46', which is arranged between the Einzelfräsrädern 48, 49. Analogously, the individual milling wheels of the cutting wheel 41 are arranged on a bearing plate 46. For the rotary driving of the cutting wheels 41, 41 ', a hydraulic drive 47 is provided on the end shields 46, 46'. By means of these hydraulic drives 47, the cutting wheels 41, 41 'are preferably in the opposite direction of rotation D, D' in rotation, wherein the left in the front view arranged cutting wheel 41 in the clockwise direction and arranged in the front view right cutting wheel 41 'rotates counterclockwise. However, the reverse direction of rotation is also possible.

The bearing plates 46, 46 'are pivotally mounted on the lower, horizontally extending strut 39 of the milling frame 22. The pivot axes of the two end shields 46, 46 'thereby run at least approximately parallel to each other. The pivot axes also extend at least approximately parallel to the axes of rotation 43, 43 'of the cutting wheels 41, 41' and to the axes of rotation of the deflection rollers 24, 24 '. By means of an adjusting device, the bearing plates 46, 46 'with the cutting wheels 41, 41' pivoted on the mill 20, i. be spread, whereby the milling cross section of the cutting wheels 41, 41 'is variable. In particular, the cutting wheels 41, 41 'can be spread open in such a way that they protrude beyond the guide elements 34 of the milling frame 22 and thus, when the milling cutter is pulled, work on the walls of the slot 80 bearing against the guide elements 34.

The adjusting device has a toggle mechanism with two levers 28, 28 'of equal length. The lever 28 is pivotally mounted at one end on the bearing plate 46, wherein the pivot axis of this bearing at least approximately parallel to the pivot axis of the bearing plate 46 on the cutter frame 22nd runs. Analogously, the lever 28 'is mounted at one end on the bearing plate 46'. At their respective other end, the levers 28, 28 'are connected together in a joint 29. The joint axis of this joint 29 likewise runs at least approximately parallel to the pivot axes of the bearing plates 46, 46 'on the milling frame 22.

The adjusting device further comprises a vertically extending hydraulic cylinder 26 which is mounted on its one side on the strut 39 of the Fräsrahmens 22 and on its other side on the joint 29. If this hydraulic cylinder 26 is actuated and extended, the joint 29 is thereby displaced downwards and the bearing plates 46, 46 'are spread open by the levers 28, 28'.

The milling cutter 20 and the holding frame 10 are formed substantially mirror-symmetrically to a vertically extending plane of symmetry 31, which runs in Fig. 1 perpendicular to the plane. To supply the hydraulic drives 47, the hydraulic cylinder 26 and optionally further arranged on the milling cutter 20 hydraulic actuators, the device for tillage supply lines 77 which are guided by the head of the crane boom 72 to the milling cutter 20.

Another embodiment of a device for tillage is shown in Figs. 6 to 10. The embodiment shown in these figures differs from the embodiment shown in FIGS. 1 to 5 on the one hand by the fact that the support cables 4, 4 'are not directly attached to the support frame 10. Rather, the holding frame 10 of Fig. 6 to 10 at its top a first cable drum 14 and a second cable drum 14 ', to which the support cable 4 and the support cable 4' is drummed. The axes of rotation of the cable drums 14, 14 'thereby run at least approximately parallel to the axes of rotation of the deflection rollers 24, 24'. The cable drums 14, 14 'each have a drive motor not shown in the figures. The cable drums 14, 14 'are particularly advantageous when used with long rope lengths for the support cables 4, 4 ', that is worked at large slot depths.

Moreover, the embodiment of a device for soil preparation illustrated in FIGS. 6 to 10 differs from the embodiment described above in that a feed hydraulic cylinder 23 is provided on the milling frame 22, with which the two deflection rollers 24, 24 'for the support cables 4, 4th 'are vertically displaceable on the cutter frame 22. By actuating this feed hydraulic cylinder 23, the vertical position of the pulleys 24, 24 'can be changed at the mill 20 and thus the cutting depth of the cutting wheels 41, 41' even with fixed support cables 4, 4 'are varied.

For moving the deflection rollers 24, 24 ', a triangular support 63 is provided on the feed hydraulic cylinder 23 at the end, on which the deflection rollers 24, 24' are mounted. To protect the feed hydraulic cylinder 23 this is surrounded by two telescoping sleeves 64, one of which is attached to the triangular support 63 and the other on the cutter frame 22.

Individual process steps of a method for tillage are shown in FIGS. 11 to 14. In the first method step shown in FIG. 11, the milling cutter 20 is introduced into a slot 80 which is arranged between two hardened diaphragm wall primary panels 81, 81 '. The slot 80 can be made by pressing the cutter 20 itself or by means of another slot wall device. When inserting the milling cutter 20 into the slot 80, the holding frame 10 remains at the upper edge of the slot 80 on the earth's surface. The supporting cables 4, 4 'are each reeved in a double-stranded manner on the milling cutter 20 and fastened at their one end to the holding frame 10, so that this holding frame 10 absorbs half of the pulling force of the milling cutter 20. For the sake of clarity, the holding frame 10 is no longer shown in FIGS. 12 to 14.

When lowering the milling cutter 20 into the milling slot 80, the cutting wheels 41, 41 'are in a retracted state. In this retracted state of the milling cross section of the cutting wheels 41, 41 'is within the cross section of the slot 80 and the Fräsrahmens 22. When lowering the cutter 20 thus no material removal on the walls of the slot 80 by the cutting wheels 41, 41' takes place.

After the mill 20 has been lowered to the bottom of the slot 80, the cutting wheels 41, 41 'are rotated and spread apart by actuating the adjusting device with the toggle mechanism. As a result, the cutting wheels 41, 41 'penetrate into the two end walls 79 of the slot 80. This state is shown in FIG. 12.

As shown in Fig. 13, the mill 20 is now pulled, the end walls 79 of the slot 80 are milled from bottom to top. The relatively high tensile forces of the milling cutter 20 that occur when pulling with spread cutting wheels 41, 41 'are partially absorbed by the holding frame 10. To produce a particularly fluid-tight diaphragm wall, the cutting wheels 41, 41 'mill the primary panels 81, 81'.

The resulting during milling soil material falls by gravity under the cutter 20 on the bottom of the slot 80. From here it can be retrieved later with a gripper. In this case, the processed soil material must not be sucked off or pumped out. The cutter 20 is therefore formed without pumping device for worn soil.

If a milling of the end walls of the slot 80 is desired only over part of its total depth, the cutting wheels 41, 41 ', as shown in Fig. 14, in the slot 80 can be moved together again and the mill 20 then without affecting the walls of the slot 80 are pulled.

FIGS. 15 and 16 show various milling cross-sections which are obtained in a method for soil cultivation can be. To produce particularly liquid-tight slot walls can be provided in particular, the end walls 74 of the slot 80 only on a part of their overall width to mill and profile them in particular. For this purpose, preferably cutting wheels 41, 41 'are provided, whose width is smaller than the width of the end walls 79.

Claims (13)

Method of tillage in which - A on at least one support cable (4, 4 ') suspended tillage equipment by a support means (70) lowered and introduced into the ground and - The tillage implement is then pulled by means of the support cable (4, 4 ') from the ground,
characterized, that a holding frame (10) is arranged in addition to the carrying device (70), - That the supporting cable (4, 4 ') is connected to the holding frame (10), and - That when lowering and / or pulling the tillage device, a part of the cable pulling force on the support frame (10) is introduced into the ground. Method according to claim 1,
characterized,
that the supporting cable (4, 4 ') is fastened to the holding frame (10) at the end in a tensile strength. Method according to one of claims 1 or 2,
characterized,
that the harrow by at least one deflection roller arranged thereon (24, 24 ') in the supporting cable (4, 4') is mounted. Method according to one of claims 1 to 3,
characterized,
that the holding frame (10) is placed on the bottom surface when lowering the soil working device and taken when removing the tillage implement from the ground with the harrow and raised. Method according to one of claims 1 to 4,
characterized,
that a soil cultivation cross section of the harrow is changed in the soil, in particular before pulling the harrow. Method according to one of claims 1 to 5,
characterized,
in that the cultivator is designed as a milling cutter (20), in particular for milling off the side walls of a slot (80) in the ground. Method according to one of claims 1 to 6,
characterized, - That the tillage implement is introduced into a secondary slot adjacent to at least one cured primary panel (81, 81 '), in particular two hardened primary panels (81, 81'), and - That the Primärpaneel (81, 81 ') is milled with the harrow, in particular profiled. Device for soil preparation, in particular for carrying out the method according to one of claims 1 to 7, with a soil cultivating device, in particular a milling cutter (20), which can be introduced into the soil by means of at least one carrying cable (4, 4 ') on a carrying device (70) for removing soil
characterized, - That in addition to the support means (70), a holding frame (10) is provided, and - That the supporting cable (4, 4 ') is connected to the holding frame (10), so that at least when pulling the soil cultivation device a part of the tensile force is introduced via the holding frame (10) in the ground. Device according to claim 8,
characterized,
in that the holding frame (10) has at least one driven cable drum (14, 14 ') for drumming the carrying cable (4, 4'). Device according to one of claims 8 or 9,
characterized,
in that a tiller device for carrying along the holding frame (10) is provided on the harrow when the tillage implement is pulled out of the ground. Device according to one of claims 8 to 10,
characterized,
that the holding frame (10) has a passage opening (11) for receiving and / or guiding the soil working device. Device according to one of claims 8 to 11,
characterized,
in that the cultivator has at least two rotatably mounted cutting wheels (41, 41 ') and an adjusting device with which the spacing of the axes of rotation (43, 43') of the two cutting wheels (41, 41 ') is adjustable. Device according to one of claims 8 to 12,
characterized,
that the soil working device and / or the holding frame (10) are especially designed to be mirror symmetrical with respect to the supporting cable guidance, a plane of symmetry (31), preferably approximately parallel to the rotation axes (43, 43 ') of the cutting wheels (41, 41') extends.

Images