DE19614783C2 - Device and method for removing layers approximately perpendicular to inner wall surfaces - Google Patents

Description

The invention relates to a device for layer removal support almost vertical inner wall surfaces with rotie tools such as milling cutters for milling old plaster or roller brushes for Cleaning surfaces and removing thin ones Color and similar layers, being used as a guide advises a vertical lifting device is used.

The invention also relates to a method for cutting depth limitation and pressure control for tools for processing almost perpendicular inner wall surfaces using an appropriate device.

The layer removal on the almost vertical inner wall surfaces, such as removing plaster or thin layers of paint is done manually using small mecha nisms, such as electropneumatic Hammering for greater depths of cut, rotating disc ben or brushes for shallow depths of cut led, the removed good and emerging Dusts are sucked into containers directly on the tool  become. This method is particularly problematic matically, if these areas are contaminated, such as for example PCB or asbestos, are contaminated because the worker right at the site of the release of the Dusts penetrated by pollutants is active.

The removal rate depends on the physical effort of the Dependent on the worker by wearing the prescribed occupational safety equipment, such as mouth, Eye and, if necessary, hearing protection, strongly on is restricted. In addition, with usual room heights armor with the appropriate time and cost wall.

An automated shift removal that the worker from the area of the release of dusts and where the removal rate from the device system as well the type of layer to be removed and not the physical effort of a worker is determined is advantageously carried out with a mobile vertical lift device-guided rotating tools or high pressurized water jets.

In contrast to the dry working layer removal with rotating tools lies with the high pressure water emit the material to be disposed of as a mixture Water and worn goods with comparatively large volume in the container.

While working with the dry shift removal rotating tools and falling material knocking down dust even from inaccessible Areas, such as cracks in walls and Floors or corners can be vacuumed easily afterwards can be done with high pressure water jetting difficult insofar as the at least moist removed  Comparatively well adheres to the surface and with a larger water content much deeper in Cracks in the floor.

In the event of an accident, such as when you are self-employed Release a clutch of the high pressure and / or Ab Suction line, distributed with the high pressure water jet len the water all over the room, being too Walls are affected. The opposite possibly with worn goods and pollutants enriched water at least penetrates the surface of floors and walls and flows into floor and Wall cracks. Through assembly joints this happens with damage water and enriched water adjoining rooms and applies ceilings, floors there and walls. It is well known what enormous Effort to eliminate such water damage is required.

A similar accident happens when dry working layer removal with rotating tools, so the effort to repair damage is comparative wise low, since the removed material is loose on the Floor is lying or dry dust is covering walls. Both good and dust can also be easily removed Vacuum out cracks and assembly joints.

For the reasons mentioned above, the dry working process with rotating tools gene, the latter being guided by vertical lifting devices be given preference.

From DD-PS 287 176 A7 is a device for Milling of old plaster known at the end of the boom a mobile carrier device, such as one Excavator, attached in such a way that an intermediate link via a universal joint arranged at its upper end,  which is a free pendulum movement of the device direction in any direction and rotation around the vertical pontic axis ensures that Connection to the frame of the rotating tool manufactures, and the required pressure on a Counterweight is generated. The counterweight is over an extension at the rear end of the device attached such that the center of gravity of the device in the working position in the opposite direction to the area to be worked behind the universal joint lies, so that one of the current inclination of the Device-dependent pressure of the rotating work against the surface to be worked.

In DE-GM 92 11 084.3 a device for Ab milling of old plaster and brushing off layers of paint described with rotating tools, the same measured with an intermediate link and a universal joint the boom end of a mobile carrier device is, with the proof in addition to the change the inclination of the device by motorized Ver pushing the counterweight is changed. The Shift removal takes place in the aforementioned devices stripes in the vertical direction.

For processing through floor or ceiling constructions limited, almost vertical interior wall surfaces are those in the documents DD-PS 287 176 A7 and DE-GM 92 11 084.3 described devices not suitable because of the required height of the pontic and the universal joint in the area a corresponding area of the ceiling construction surface to be machined is not reached and other these devices due to the pressure counterweights are very mass intensive, so that the mostly prescribed traffic loads over be paced.  

In the Vorrich described in DD-PS 287 176 A7 the counterweight is far below the scope of the Device so that wall surface areas considerably height near the floor cannot be reached. At the device described in DE-GM 92 11 084.3 are the counterweights of the free hanging device tion equally below the frame, so that when Bleed in the floor area depending on the Inclination of the device is also an unprocessed one The wall area remains.

In the DD-PS 287 176 A7 and Vorrich described in DE-GM 92 11 084.3 mobile boom systems, such as Truck lifts, truck loading cranes, excavators and telescopic stackers used. These devices are due to their Size for the removal of layers on inner wall surfaces not suitable.

A method and apparatus for processing of approximately vertical surfaces, for example Facades is also known from WO 95/04203 A1. The equipment or tools for processing the Surfaces are firmly connected in an adjustable head the one that is formed by a frame. The one with Means for positioning the frame and the work witnesses to the surface to be worked on and Control of the tool equipped head is on Extension arm of a mobile hoist arranged and can about a pivot point in the horizontal plane and over the extension arm both in the horizontal plane and can be adjusted in the vertical plane. For the machining This solution is not used for interior wall surfaces applicable. A technical teaching to control the Tool in relation to the working process on the approximately perpendicular surface is in WO 95/04203 A1 also not disclosed.

The invention is therefore based on the object Device and a method to create the Layer removal on interior wall surfaces largely automatically tize the non-editable area of the machining vertical wall surface in the area of Ceiling and floor constructions significantly reduced ren, the construction mass of the device essential minimize and independent of the structure and Condition of the layer to be processed evenly Ensure deep, definable removal.

This object is achieved according to the Device with the features specified in claim 1 len and with regard to the method with those in the claim 5 or 6 specified features solved. More before Partial developments of the invention result from subclaims 2 to 4 and 7 to 17.  

The advantages achieved with the invention exist especially in that the effectiveness of Shift removal not through physical effort a worker is determined, but by the in Depending on the type of shift removal, such as Example plaster and similar layers with larger Depth of cut or color and similar layers with low depth of cut, set feed rate with which the rotating tool is vertical direction along the surface to be worked is moved.

The required pressure is automatically the adjusted depth of cut adjusted so that last re always remains constant, which is the prerequisite is created that the operator of the device from the Work area is kept away.

The removed material is suctioned off and lies in the Containers in concentrated and dry form maximum density, with which the volume to be disposed of men is a minimum.

The subsequent suction of goods falling on the floor and knocking down dust even from inaccessible Areas, such as cracks in walls and Floors, corners and assembly joints, does not cause any difficulties difficulties.

In the event of an accident, the effort is to repair the damage low since the removed material is loose on the Floor is lying or dry dust is covering walls. Both good and dust can also be easily removed Vacuum out cracks and assembly joints.

A device for removing layers on inner walls is as an embodiment of the invention in the drawings gene shown and will be described in more detail below ben.

Show it

Fig. 1 shows a device system in side view

Fig. 2 shows a device system in plan view

Fig. 3 view the frame in the cut Seitenan

Fig. 4 shows the frame in plan view

Fig. 5 shows the frame in the front view

Fig. 6 shows the device system in front of the wall surface

Fig. 7 the control panel

Fig. 8 bleed position with lateral position of the wall surface

Fig. 9 bleed position in front of the device system lying wall surface

Fig. 10 gate with lateral position of the wall surface

Fig. 11 Section with the wall surface lying in front of the device system

Fig. 1 shows the working device system in Be tenansicht and Fig. 2 in plan view, in which a vertical lifting device 1 , such as a free-lift mast electric stacker, is used as a guide device. On the connection plate 2 , on which the forks are otherwise attached for load bearing, a spherical bearing 3 for the articulated mounting of a cantilever arm 4 is BEFE Stigt. At the end of the cantilever arm 4 , a frame 5 for holding a rotating tool 6 and its drive units is attached.

The cantilever arm 4, including the frame 5 , is pivoted against the wall surface 11 about the articulation point 3 by means of a servomotor consisting of the working cylinder 8 , rack 9 and gear 10 .

The contact elements 15 serve to limit the set cutting depth s and are firmly connected to the upper sliding plate 16 , which is mounted in a sliding and dust-tight manner in the side parts 17 of the frame 5 .

By moving the actuating element 18 at right angles to the side parts 17 of the frame 5 , the upper sliding plate 16 and thus the contact elements 15 are moved paral lel to the side parts 17 . The required depth of cut s is set in the same way.

The actuating element 18 lies in the obliquely arranged slot 23 of the upper sliding plate 16 . The Schrägla ge of the slot 23 determines the movement of the sliding plate 16 relative to the movement of the actuator 18th With increasing inclination with respect to the Orthogo nals to the side parts 17 , the movement of the sliding plate 16 increases relative to the movement of the Stellelemen tes 18 and vice versa.

The second upper sliding plate 19 , to which the upper horizontal block brush 20 and the upper vertical block brushes 21 are fastened, is supported by means of leg springs 22 to the upper sliding plate 16 and is equally sliding and dustproof in the side parts 17 of the frame mens 5 stored.

With the movement of the upper sliding plate 16 , the upper sliding plate 19 and thus the block brushes 20 and 21 are moved parallel to the side parts 17 via the resilient support 22 . This ensures that regardless of the set depth of cut s, the upper block brushes 20 and 21 are always pressed against the wall surface 11 with the same pressure. For this purpose, the leg springs 22 preferably have a low spring stiffness.

Fig. 3 shows the frame 5 in the sectional side view, Fig. 4 in the top view and Fig. 5 in the front view. Between frame 5 and toothed belt gear 13 , a clutch 12 is arranged, which allows the optional setting of the rotational movement of the frame 5 rela tively to the cantilever arm 4 . In the closed state of the clutch 12 , the frame 5 is rotated via a toothed belt 14 driven by an electric motor 13 relative to the extension arm 4 .

When the clutch 11 is released, there is a hinge point 7 between the toothed gear mechanism 14 and the clutch 12 , which allows the free rotation of the frame 5 with respect to the arm 4 . This ensures that, when the coupling 12 is released, the rotating tool 6 is always pressed parallel to the wall surface 11 to be machined, regardless of the current position of the extension arm 4 . This is particularly important for work progress in the horizontal direction along the wall surface 11 , since it must not be assumed that the vertical lifting device 1 is moved exactly parallel to the wall surface 11 when a new vertical path is applied for the removal.

Under the rotating tool 6 , a horizontally lying block brush 24 and vertically lying block brushes 25 are equally fastened to a first sliding plate 26 , which is resiliently supported by means of Schenkelfe 22 against a second sliding plate 27 .

According to Fig. 4, a long hole 28 is disposed in the sliding plate 27, which is mirror-symmetrical to the long hole 23 of the sliding plate sixteenth This ensures that when the actuating element 18 moves, the sliding plate 27 is moved equally to the sliding plate 16 , but in the opposite direction.

The block brushes 24 and 25 arranged under the rotating tool are pressed regardless of the selected cutting depth s equally to the block brushes 20 and 21 lying above the rotating tool 6 against the wall surface 11 which has already been machined. It is assumed that the wall surface 11 is machined from bottom to top in the vertical direction.

The actuator 18 has in its center a Ge threaded bore through which a threaded spindle 37 is guided. The threaded spindle 37 is rotatably supported on both sides in the bearings 29 which are fastened to the side parts 17 . By means of an electric motor 30 , the threaded spindle 34 is set in rotation via a toothed belt gear 31 , which results in a movement of the adjusting element 18 .

To determine the current position of the actuating element 18 , a potentiometer with a gear 32 is arranged on the side wall 17 , which picks up the rotations of the threaded spindle 37 . The current position of the actuator 18 determines the position of the Kontaktelemen te 15 and thus the depth of cut s.

At the front of the tubular contact elements 15 , the edge is pressed so that the balls 33 do not fall out of the opening. The balls 33 are in the interior of the contact elements 15 on all sides closed cylinder 34 . The latter rests on the opposite side of the spiral spring 35 .

If the tool 6 is pressed against the wall surface 11 , when the set depth of cut s is reached, the ball 33 presses against the cylinder 34 and this against the coil spring 35 . On the rear wall of the contact element 15 , a pressure switch 36 is BEFE Stigt, which is actuated when the coil springs 35 are compressed accordingly. In this way, it is continuously determined whether the current pressure is sufficient for the set cutting depth s. If the pressure switch 36 is not actuated, the depth of cut s is less than the required value.

When removing different layers 11 are under different pressures of the rotating tool 6 against the wall surface 11 to be machined. For example, brushing off paint layers with a low depth of cut s requires a significantly lower amount of pressure compared to milling plaster with a large depth of cut s. On the other hand, the milling of concrete with a small depth of cut s, in contrast to the milling of plaster with a large depth of cut s, requires a significantly greater pressure.

As a result of the depth of cut limitation by the con tact elements 15 , the required depth of cut is always achieved, provided that the required pressure is large enough even with respect to the geometrically unfavorable position of the frame 5 .

If the removal is always carried out at maximum pressure, it must be expected that when removing with a low depth of cut s, such as when brushing thin layers of paint, the balls 33 are pressed into the wall surface 11 , so that there is inevitably a depth of cut s that corresponds correspondingly larger than the required.

In addition, it is to be expected that undesirable pressure traces of the balls 33 remain due to the excessive pressure on the machined surface. In the most unfavorable case, the carrier layer breaks due to the point load, since this, particularly in the case of interior plaster surfaces, generally has a low strength (MG I).

When removing with a larger depth of cut s, such as milling old plaster, the excessive pressure causes no remaining pressure marks and the increase in the depth of cut s due to the impression of the balls 33 is meaningless.

In the case of walls contaminated with pollutants, there is a requirement to remove a layer 11 until the pollutant content of the remaining wall is below the required limit value. Since the maximum depth of cut s relating to one working step is limited in terms of design with respect to the rotating tool 6 , the removal is carried out in several working steps if necessary.

With the setting of the required cutting depth s, the contact elements 15 are moved in the opposite direction to the wall surface 11 . The tool 6 is pressed against the latter with a pressure that depends on the strength and hardness of the wall surface 11 until the depth of cut s has reached the required value. Thus, the pressure no longer acts on the tool carrier 6 alone, but equally on the contact elements 15 . The result is that the pressure rises to the maximum value, since the tool 6 cannot penetrate further into the wall surface 11 .

While the tool 6 penetrates into the wall surface 11 until the required depth of cut s is reached, the pressure switches 36 are relieved. With the achievement of the required depth of cut s, the pressure switch 36 is actuated. The pressure acting at this moment is that which is required to maintain the required depth of cut s.

To avoid the constant actuation of the pressure switch 36 , a setpoint is defined depending on the size of the required pressure, which is above the required value.

If this setpoint is recorded and maintained, it acts during the further removal always a proof that ensures that the required depth of cut s is always is maintained.

The pressure is only increased when the pressure switch 36 is relieved and the removal no longer takes place with the required depth of cut s. This applies when the rotating tool 6 encounters local layers 11 , the strength and / or hardness of which is above the normal value.

The pressure is only reduced when the pressure switch 36 remain actuated for a defined period. Pressing the pressure switches 36 for a longer period indicates that the setpoint is sufficiently above the required pressure.

With the above-described method for adapting the pressure to the predetermined cutting depth s, the surface is always removed with a constant cutting depth s irrespective of unevenness on the surface of the wall surface 11 ; this also applies to surfaces slightly inclined to the vertical.

Furthermore, it is ensured that the pressure always acts in a size that is slightly above the required value to maintain the required cutting depth. Thus, the power requirement for the drive of the rotating tool 6 and the wear of the cutting tools are always limited to the required minimum.

With regard to the determination of the exceeding of the setpoint of the pressure, the currently acting pressure must be constantly recorded and compared with the setpoint. To determine the instantaneous pressure, for example the instantaneous oil pressure in the working cylinder of FIG. 8 , the instantaneous deformation of the extension arm 4 or the torsional moment at the articulation point 3 can be used. In all three cases, a conversion taking into account the current position of the frame 5 with respect to the cantilever arm 4 is required. For this purpose, the angle of rotation of the cantilever arm 4 and the point of rotation 7 of the frame 5 are continuously detected at the point of articulation 3 by means of the angle encoder.

At the start of work, the device system, as shown in FIG. 6 in the transport position, is parked parallel or at least approximately parallel to the wall surface 11 at a distance a. With sufficient room width, the device system is turned off so that the distance a is so large that when the tool 6 is in contact with the wall surface 11, the cantilever arm 4 is approximately at right angles to the connecting plate 2 , as shown in FIG. 2. This ensures that the tool 6 is pressed against the wall surface 11 with a pressure that is rich in Extremwertbe.

The frame 5 is via the function keys gate of the control panel of the remote controller shown in Fig. 7 positioned in front of the wall surface 11 so that the tool 6, as shown in Fig. 8, is parallel to the wall surface 11.

If a function corresponding to the position of the wall surface 11 , left right, front left or front right, is pressed, the connecting plate 2 and thus the frame 5 and the tool 6 are first moved into the lower limit position. Simultaneously seitli cher position of the wall surface 11 of the frame 5 is rotated from the position shown in Fig. 6 the transport position in the entspre sponding direction by the angle 1/2 π, so that the side parts 17 of the frame 5 circuiting plate parallel to An are a 2.

With the rotation of the frame 5 in the predetermined direction, the cantilever arm 4 is rotated in the opposite direction at the same time, so that the collision with the frame 5 against the wall surface 11 is closed.

If the wall surface 11 lies in front of the device system, the extension arm 4 is rotated in the corresponding direction. At the same time, the frame 5 is rotated by the same amount in the opposite direction, so that the direction of the frame 5 as shown in Fig. 9 is maintained. This ensures that the required pressure is generated for this case via the servo motor 8 , 9 , 10 . This turning takes place in the corresponding direction as long as the corresponding function key remains pressed.

When the gate position is reached, the upper sliding plate 16 and thus the upper block brushes 20 and 21 and the contact elements 15 are moved into the front end position. At the same time, the tool 6 is set in rotation. The lower sliding plate 24 and the lower block brushes 25 and 26 are inevitably moved equally in the opposite direction.

Thereafter, the frame 5 is moved in the direction of the wall surface 11 to be cut. For this purpose, the cantilever arm 4 is rotated in the corresponding direction, likewise the frame 5 is rotated in the opposite direction, so that its original position, as shown in FIG. 10 for a lateral wall surface 11 , is maintained. This movement is carried out ge until the pressure switch 36 is actuated in both contact elements 15 , which ensures that the tool 6 is parallel to the wall surface 11 .

If the wall surface 11 lies in front of the device system, then, as shown in FIG. 11, the entire device system is moved in the direction of the wall surface 11 until the pressure switches 36 are actuated. Cantilever arm 4 and frame 5 retain their original rich direction.

Now the upper sliding plate 16 and thus the con tact elements 15 are retracted so far that the removal is carried out with the depth of cut set via the corresponding function key of the operating console. If no cutting depth s was previously set via the corresponding function key on the control panel, the upper sliding plate 16 and thus the contact elements 15 are retracted to such an extent that removal with a defined minimum cutting depth, such as required when brushing off layers of paint, follows.

When the upper sliding plate 16 and thus the contact elements 15 are retracted, the extension arm 4 and thus the frame 5 are pressed further against the wall surface 11 . If the periphery of the balls 33 lies behind the periphery of the cutting circle of the tool 6 , the pressure acts on the tool 6 until the set depth of cut s in the wall surface 11 is reached. Since the vertical movement has not yet started, the set cutting depth is reached very quickly. The start for the vertical movement is therefore determined when the actuating element 18 has assumed a position which corresponds to the set depth of cut.

Provided that the layer is removed with the set depth of cut, the balls 33 roll on the wall surface 11 . A state arises which is characterized in that the pressure acts alternately on the tool 6 and the balls 33 or on both.

The vertical movement takes place with the feed speed v set via the corresponding function key on the control panel. If no advance speed v was set up to the point in time when the vertical movement started, then the movement takes place at a defined minimum speed v, as required when milling hard layers 11 with great strength and a large depth of cut.

With regard to a maximum removal rate, the vertical movement always takes place at the maximum permissible feed speed v. This means that keeping the set depth of cut s constant takes place by increasing the pressure and not by reducing the feed speed v. The feed speed v is only reduced if the set cutting depth s is not reached at maximum pressure. The decrease in the Schnittie fe s manifests itself in the fact that at least one of the pressure switches 36 is not actuated.

This procedure also has a positive effect to reduce tool wear. It is well known that an increase in the Feed speed v at constant speed a reduction in the wear path and thus a This increases the tool life Has. In addition, the associated Ver enlargement of the chip cross-section a coarse worn goods, what a reduced need for Drive power causes.

The vertical movement continues until the function key down is pressed on the control panel. Thus, the upper sliding plate 16 and thus the contact elements 15 are moved in the direction of the wall surface 11 . This has the consequence that the tool 6 is pushed out of the layer 11 . At the same time, the tool 6 is put out of operation.

Are the sliding plate 16 and thus the contact elements 15 moved to the front limit position, the Ausle gerarm 4 is rotated in the opposite direction to the wall surface 11 . Likewise, the frame 5 is rotated in the opposite direction to move the cantilever arm 4 so that its original position is retained. This movement continues until the in Fig. 8 and Fig. 9 gating positions shown are reached. When the gate position is reached, the vertical movement starts from top to bottom.

If the connection plate 2 has the lower limit position, the device system must be moved to cut an adjacent new path. This is done by pressing the corresponding function key on the control panel. The device system moves in the specified direction as long as the corresponding function key remains pressed. If the travel path corresponding to a cutting path width is reached, the device system stops automatically.

There are bumps in the floor and movement to take into account accuracy. So that's why Device system not exactly by the cutting path width proceed, but by an amount less that with Security ensures that between the cut bah no unprocessed strips remain.

If the device system comes after the procedure by one Cutting path width to a standstill, the is repeated operation described above by pressing one of the Function keys for bleed.

If the wall surface 11 lies in front of the device system, the method for the new cutting path is carried out via the normal control panel of the vertical lifting device 1 .

The function keys cantilever arm and frame of the control panel of the remote control are used for manual movement of the cantilever arm 4 and the frame 5 when wall surfaces 11 which are difficult to access, such as in niches, must be worked on.

List of reference symbols

1

Vertical lifting device

2nd

Connection plate

3rd

Spherical bearings

4

Cantilever arm

5

frame

6

Tool

7

Hinge point

8th

Working cylinder

9

Rack

10th

gear

11

Wall surface

12th

clutch

13

Electric motor

14

Timing belt transmission

15

Contact elements

16

Sliding plate

17th

Side panels

18th

Actuator

19th

Sliding plate

20th

Block brush

21

Block brush

22

Leg springs

23

Long hole

24th

Block brush

25th

Block brush

26

Sliding plate

27

Sliding plate

28

Long hole

29

camp

30th

Electric motor

31

Timing belt transmission

32

transmission

33

Bullet

34

cylinder

35

feather

36

Pressure switch

37

Threaded spindle

Claims (17)

1. Device for removing layers approximately perpendicular inner wall surfaces with rotating tools, such as, for example, milling cutters for milling old plaster or roller brushes for cleaning surfaces and removing thin layers of paint and similar layers, a vertical lifting device being used as the guide device, characterized in that
that a frame ( 5 ) for mounting the rotating tool ( 6 ) horizontally rotatably arranged at the end of a cantilever arm ( 4 ) and the cantilever arm ( 4 ) at the opposite end ho rizontal rotatable on a vertically displaceable connecting plate ( 2 ) of the vertical lifting device ( 1 ) is connected,
that on the frame ( 5 ) a first upper sliding plate ( 16 ) with an obliquely elongated slot ( 23 ) and a first lower sliding plate ( 27 ) with an equally obliquely elongated hole ( 28 ) is arranged and
that the elongated holes ( 23 and 28 ) are mirror symmetrical to each other. 2. Device according to claim 1, characterized in that the first upper slide plate ( 16 ) and the first lower slide plate ( 27 ) are arranged movably parallel to side parts ( 17 ) of the frame ( 5 ) and the movement of the slide plate ( 16 ; 27 ) via an adjusting element ( 18 ) it follows, which engages both in the one elongated hole ( 23 ) and in the other elongated hole ( 28 ) and can be moved at right angles to the side parts ( 17 ). 3. Apparatus according to claim 1 or 2, characterized in that on the first upper sliding plate ( 16 ) with balls ( 33 ) equipped contact elements ( 15 ) are arranged such that when the actuator ( 18 ) with respect to the Langlö cher ( 23 ; 28 ) assumes a centrally symmetrical position and the front tangent from the periphery of the cutting circle of the tool ( 6 ) to the periphery of one of the balls ( 33 ) of a contact element ( 15 ) is a perpendicular, this corresponds to a depth of cut setting of s = 0 . 4. Device according to one of claims 1 to 3, characterized in that below the first upper sliding plate ( 16 ) a second upper sliding plate ( 19 ) and above the first lower sliding plate ( 27 ) a second lower sliding plate ( 26 ) are arranged those horizontal block brushes ( 20 ; 24 ) and vertical block brushes ( 21 ; 25 ) are BEFE Stigt and that the second sliding plates ( 19 ; 26 ) are resiliently supported against the first sliding plates ( 16 ; 27 ). 5. A method for limiting the depth of cut and pressure control for tools for processing approximately perpendicular inner wall surfaces using a device according to claim 2, characterized in that an operating panel is used with the function keys causing the gate of the wall surface and with the actuation of one of the function keys "gate" of the frame ( 5 ) at the side of the wall surface ( 11 ) is rotated such that the side parts ( 17 ) are parallel to the connecting plate ( 2 ) and at the same time the extension arm ( 4 ) is rotated in the opposite direction to such an extent that an abutment of the frame ( 5 ) against the wall surface ( 11 ) during the rotation of the frame ( 5 ) is excluded. 6. A method for limiting the depth of cut and pressure control for tools for machining approximately perpendicular inner wall surfaces using a device according to claim 2, characterized in that an operating panel is used with the function keys causing the cut of the wall surface and with the actuation of one of the function keys "cut" of the off low arm ( 4 ) with front wall surface ( 11 ) is rotated so far that the neces sary pressure can be generated and that the frame ( 5 ) is rotated equally to the cantilever arm ( 4 ) in the opposite direction, so that the side parts ( 17 ) always lie at right angles to the connection plate ( 2 ). 7. The method according to claim 5 or 6, characterized in that with the achievement of the bleed described in claim 6 or 7, the upper sliding plate ( 16 ) and thus the upper block brushes ( 20 ; 21 ) and the contact elements ( 15 ) in the front end position is moved and at the same time the tool ( 6 ) is set in rotation. 8. The method according to claim 7, characterized in that with the reaching of the Anscheidstel development of the cantilever arm ( 4 ) with the side wall surface ( 11 ) towards the wall surface ( 11 ) and equally the frame ( 5 ) is rotated in the opposite direction, so that its original position is maintained and that this movement is carried out until the pressure switch ( 36 ) is actuated in both contact elements ( 15 ), thus ensuring that the tool ( 6 ) is parallel to the wall surface ( 11 ). 9. The method according to claim 7, characterized in that the vertical lifting device ( 1 ) with the front wall surface ( 11 ) in the direction of the wall surface ( 11 ) is moved until the contact surface ( 11 ) until the pressure switch in both contact elements ( 15 ) ( 36 ) are actuated. 10. The method according to any one of claims 8 or 9, characterized in that when at least one of the pressure switches ( 36 ) is actuated, a clutch ( 12 ) is released so that the frame ( 5 ) freely around one, the horizontal Rotation causing pivot point ( 7 ) can rotate, and that the clutch ( 12 ) remains released until the tool ( 6 ) on the contacts elements ( 15 ) is lifted from the cutting path. 11. The method according to any one of claims 8 to 10, characterized in that with the actuation of the pressure switch ( 36 ), the upper sliding plate ( 16 ) and thus the contact elements ( 15 ) are retracted so far that the removal with the corresponding function key of the Control panel set cutting depth s takes place and that if no cutting depth s has been set, the upper sliding plate ( 16 ) and thus the contact elements ( 15 ) are retracted to such an extent that the removal with a defined minimum cutting depth s, such as when brushing off layers of paint required. 12. The method according to any one of claims 5 to 11, characterized in that when the Stellele element ( 18 ) has assumed a position corresponding to the set depth of cut s, the vertical movement with the feed function v set via the corresponding function key of the control panel starts and that, if no feed speed v has been set up until the time of the insertion of the vertical movement, the vertical movement with a defined minimum speed v, as required for example when milling hard layers ( 11 ) with great strength at a large depth of cut s, takes place. 13. The method according to any one of claims 5 to 12, characterized in that the vertical movement takes place until a function key "down" is pressed on the control panel, and that thus the upper sliding plate ( 16 ) and thus the contact elements ( 15 ) are moved in the direction of the wall surface ( 11 ), with the result that the tool ( 6 ) is pushed out of the layer ( 11 ) and that at the same time the tool ( 6 ) is put out of operation. 14. The method according to any one of claims 5 to 13, characterized in that when the sliding plate ( 16 ) and thus the contact elements ( 15 ) have reached the front limit position, the Ausle gerarm ( 4 ) with the side wall surface ( 11 ) in opposite direction to the wall surface ( 11 ) and equally the frame ( 5 ) is rotated in the opposite direction so that its original position is maintained and that this movement continues until the gate position described in claim 5 is reached and that with the reaching of Bleed position starts the vertical movement from top to bottom until the lower limit position is reached. 15. The method according to any one of claims 5 to 14, characterized in that by pressing the corresponding function key of the control panel of the remote control with side wall surface ( 11 ), the movement of the vertical lifting device ( 1 ) for cutting a new vertical cutting path only by the amount of Width of a cutting path is moved and that this amount is defined smaller than the Schnittbahnbrei te, so that unprocessed strips between the cutting paths are excluded. 16. The method according to any one of claims 5 to 15, characterized in that the pressure is only increased when the pressure switch ( 36 ) is relieved and thus the removal is no longer carried out with the required depth of cut s, and the pressure is only reduced, when the pressure switches ( 36 ) are actuated for a defined period. 17. The method according to any one of claims 5 to 15, characterized in that the vertical movement from bottom to top always with the maximum permissible feed speed v takes place and keeping the set constant Cutting depth s primarily by increasing the Pressure and not by reducing the pre thrust speed v occurs and that, first if the set depth of cut s at maxima feed pressure is not reached speed v is reduced.