Slot wall cutter with an adjustable cutting tool

Abstract

A trench cutter (10) with at least one bearing plate (12) and at least one milling wheel (14) rotatably mounted on the bearing plate (12), which has at least one adjustable cutting tool (20) for crushing soil material, wherein a control bar (30) is arranged on the bearing plate (12), with which the adjustable cutting tool (20) mechanically interacts when the milling wheel (14) is rotated, such that it automatically moves between a folded-in position and an unfolded position depending on the milling wheel rotation angle, characterized in that the control bar (30) is designed as a closed ring and is arranged on the bearing plate (12) in such a way that the adjustable cutting tool (20) moves continuously along the control bar (30) when the milling wheel (14) is rotated.

Description

[0001] The present invention relates to a slot wall milling machine according to the preamble of claim 1 and to a carrier device with such a machine.

[0002] Diaphragm wall cutters are used to create trenches for the construction of diaphragm walls in a wide variety of construction projects and are available in various designs and sizes. They are typically mounted on mobile carriers such as mobile cranes, specialist foundation equipment, or cable excavators and feature multiple cutter wheels with cutting tools to remove soil material to create a trench. The cutter wheels are typically rotatably mounted on one or more bearing plates, which are located on the underside of a cutter frame. A common configuration includes two pairs of cutter wheels, each pair mounted on its own bearing plate, with one cutter wheel on each side of the plate. The cutter wheels are typically mounted on cutter wheel bearings on the bearing plate, which can be driven to rotate them.

[0003] With diaphragm wall cutters of this type, where the milling wheels are arranged laterally on a bearing plate, the problem arises that soil material below and to the side of the bearing plate cannot be directly removed by the milling wheels. The removal of this excess material between the milling wheels, or to the side and below the bearing plate, can be achieved in known diaphragm wall cutters by using adjustable cutting tools or folding teeth. These tools move between a folded-in position, in which they do not collide with the bearing plate, and an extended position, in which they protrude into the area of ​​the excess material to be removed to the side / below the bearing plate.

[0004] The adjustable cutting tool is guided and moved between the folded and unfolded positions by a cam-type guide via a control strip located on the bearing plate. In known devices, this control strip is situated below and, if necessary, to the side of the milling wheel bearing and, during rotation, forces the adjustable cutting tool into the unfolded position. For the transition to the folded position, either a spring element is provided, which presses the adjustable cutting tool into the folded position in the upper area of ​​the bearing plate, or contact is made via a usually chamfered transition surface of the bearing plate. Thus, in known devices, the control strip is only present within the angular range of the unfolded position of the adjustable cutting tool.

[0005] The present invention is based on the objective of simplifying the construction of the folding mechanism of the adjustable cutting tool described above in a slot wall milling machine of the generic type.

[0006] According to the invention, this problem is solved by a slot wall milling machine with the features of claim 1. Advantageous embodiments of the invention are described in the dependent claims and the following description.

[0007] Accordingly, a trench cutter is proposed which comprises at least one bearing plate and at least one milling wheel rotatably mounted on the bearing plate. The milling wheel has at least one adjustable cutting tool for crushing soil material. In addition, the milling wheel preferably has a plurality of fixed cutting tools distributed around its outer circumference, i.e., tools that are immovable relative to the milling wheel.

[0008] A control bar is arranged on the bearing plate, in particular screwed to it, with which the adjustable cutting tool mechanically interacts when the milling wheel rotates, such that the adjustable cutting tool automatically moves between a folded-in and a folded-out position depending on the milling wheel's rotation angle. The control bar thus functions as a cam bar for the movement of the adjustable cutting tool and implements a mechanical cam control.

[0009] According to the invention, the control bar is not interrupted as in known solutions, but is designed as a closed ring and arranged on the bearing shield in such a way that the adjustable cutting tool moves continuously along the control bar when the milling wheel is rotated, i.e. over the full 360°.

[0010] A fully circumferential control strip has the advantage over an interrupted, only partially circumferential one that the closed ring or full ring construction is easier to manufacture, as it results in less distortion of the control strip. This eliminates or reduces the need for post-processing of the control strip, especially when made of metal, thus saving on manufacturing costs.

[0011] Furthermore, extending the control bar into the angular range traversed by the adjustable cutting tool in its folded position offers the advantage that the adjustable cutting tool is guided in a defined or more defined manner even in the folded position and cannot perform excessive pivoting movements. This is particularly relevant in a design where the adjustable cutting tool is not pressed into the folded position by a spring mechanism. This allows the folding angle of the adjustable cutting tool to be significantly reduced, resulting in less wear.

[0012] The term "cutting tool" is not to be understood restrictively here and does not require actual cutting or the presence of a cutting blade. Rather, it can refer to any element that can be used to crush or mill soil material, for example, a milling tooth with a conical tip.

[0013] In one possible embodiment, the bearing shield comprises at least one rotatably driven milling wheel bearing to which a milling wheel is attached. The milling wheel bearing can be driven rotationally via a drive unit and, if necessary, a gearbox of the slot wall cutter, with the milling wheel being mounted on the milling wheel bearing, in particular via a corresponding milling wheel hub. The milling wheel is positioned, in particular, coaxially on the milling wheel bearing. The control bar completely surrounds the milling wheel bearing, i.e., over the full 360°, and is arranged, in particular, coaxially with the axis of rotation of the milling wheel bearing.

[0014] In another possible embodiment, the control bar comprises a first section extending over a first angular range (with respect to the axis of rotation of the milling wheel) and a second section extending over a second angular range. The first and second sections have different heights, so that a mechanical interaction between the sections of the control bar and the adjustable cutting tool results in at least an extension and, if necessary, a folding in. Preferably, the first and second sections have constant heights over their respective angular ranges. The height of a section of the control bar is defined here as the maximum extent of the control bar in that section, measured from the outside of the bearing plate on which the control bar is mounted, parallel to the axis of rotation of the milling wheel.

[0015] In another possible embodiment, the control bar is designed and arranged in such a way that the adjustable cutting tool is in the folded position when passing over the first section of the control bar or the first angular range, and in the unfolded position when passing over the second section of the control bar or the second angular range.

[0016] The first section is located in an upper area between the aforementioned milling wheel bearing and a milling frame to which the bearing shield is connected. In this section, or angular area, the adjustable cutting tool must be guided laterally past the bearing shield.

[0017] Preferably, the second section is located below and / or to the side of the milling wheel bearing. In this section or angular area, the adjustable cutting tool is extended and removes excess material at the front and rear, as well as below the bearing shield.

[0018] In another possible embodiment, the height of the first section is 30-70% of the height of the second section, preferably 40-60%, and particularly preferably approximately 50%. The exact ratios may depend on the bearing shield and milling wheel geometry, or more generally on the size of the trench cutter and thus the trench to be created.

[0019] In another possible embodiment, the first angular range is smaller than the second. The adjustable cutting tool is thus held in the extended position for as long as possible, or over the largest possible angular range, in order to effectively remove the lateral / lower material protrusion.

[0020] Alternatively or additionally, it may be provided that the first section is arranged completely above (this refers in particular to a vertical orientation of the slot wall cutter, in which the milling wheels are located at a lower end) the axis of rotation of the milling wheel.

[0021] In another possible embodiment, it is provided that the first and second sections have first and second control surfaces on their sides facing away from the bearing shield (i.e., the sides facing outwards towards the milling wheels) which can be contacted by the adjustable cutting tool, in particular via a guide element.

[0022] These first and second control surfaces preferably run parallel to each other, i.e., they are not inclined or curved relative to each other.

[0023] Alternatively or additionally, it is preferably provided that the first and second control surfaces are perpendicular to the axis of rotation of the milling wheel. The control surfaces are therefore not inclined relative to the planes of motion defined by the paths of movement of the cutting tools.

[0024] In another possible embodiment, the control bar has transition sections between the first and second sections, the height of which changes gradually between the first and second sections. The first and second sections of the control bar merge into one another via these transition sections. In particular, contact with the transition section located downstream of the first section in the direction of milling wheel rotation, which increases the height of the control bar towards the subsequent second section, results in a movement, specifically a pivoting of the adjustable cutting tool from the folded-in to the unfolded position.

[0025] Preferably, the control bar comprises no other sections with differing heights besides the first and second sections and the two transition sections. In other words, the control bar preferably has exactly one first section, exactly one second section, and exactly two transition sections located between and immediately adjacent to it.

[0026] Preferably, the height of the transition sections between the first and second sections changes linearly, resulting in ramp-shaped transition sections.

[0027] In another possible embodiment, the adjustable cutting tool is pivotably mounted on the milling wheel, and the first section of the control bar is designed and the adjustable cutting tool is arranged such that the adjustable cutting tool, in the folded position, can perform a pivoting movement of a maximum of 5°, preferably a maximum of 3°, and particularly preferably a maximum of 2°. This reduced freedom of movement of the adjustable cutting tool in the folded position results from the fact that, due to the extension of the control bar into the angular range of the folded position in the form of the first section, the control surface is brought closer to the adjustable cutting tool in the folded position.

[0028] In known solutions where the interrupted control bar ends at the transition sections, a lateral wear plate of the bearing reed typically acts as a control surface in the area of ​​the folded position, or rather, limits the pivoting movement of the adjustable cutting tool. In this case, the adjustable cutting tool can have a relatively large range of motion (for example, more than 10°), especially if it is not pre-tensioned into the folded position by a spring mechanism. The resulting pivoting movements in the folded position can lead to increased wear. This is significantly reduced by the more defined guidance in the first section of the proposed control bar.

[0029] In another possible embodiment, the adjustable cutting tool is not spring-loaded. The movement from the extended position to the retracted position is therefore not effected by a spring mechanism, but rather by a mechanical interaction between the adjustable cutting tool and the control strip and / or the bearing shield. For this purpose, the adjustable cutting tool and the control strip are arranged and designed such that the movement from the retracted position to the extended position occurs via contact with the control strip (in particular, the transition section described above), and the movement from the extended position to the retracted position occurs via mechanical contact with the control strip and / or a transition surface of the bearing shield that is preferably chamfered relative to the milling wheel plane.The transition surface mentioned above can be located at the rear end of the bearing shield when viewed in the direction of rotation of the milling wheel and may be covered by a wear plate.

[0030] In another possible embodiment, the control strip is formed in one piece. The one-piece manufacturing of the control strip according to the invention is simplified by the fact that it is formed as a solid ring, i.e., it is uninterrupted and therefore cannot warp as much as an interrupted control strip and requires no or less post-treatment.

[0031] In another possible embodiment, the adjustable cutting tool comprises a guide element, the contact of which with the control bar allows the adjustable cutting tool to be automatically moved from the extended position to the retracted position when the milling wheel is rotated. The guide element can be designed as a driver or sensing finger of the adjustable cutting tool. The adjustable cutting tool is arranged, in particular, such that the guide element is located at the radial height of the control bar and adjacent to it at every milling wheel rotation angle.

[0032] Preferably, the guide element is arranged on a side of an interchangeable milling tooth opposite a pivot axis or joint of the adjustable cutting tool. The milling tooth can be an actual tooth or, for example, a cutting blade. The guide element can, for example, be formed integrally with a base body that includes a recess for the interchangeable milling tooth, or it can be a separate part that is connected to such a base body by means of fasteners.

[0033] In another possible embodiment, the adjustable cutting tool is designed such that, in the folded position, it has an axial distance to the bearing shield and can move past it, and in the unfolded position, it projects into an area radially adjacent to the bearing shield. In this context, the terms "axial" and "radial" refer to the axis of rotation of the milling wheel; that is, the axial distance denotes a distance parallel to the milling wheel's axis of rotation, and the radial distance denotes a distance perpendicular to the milling wheel's axis of rotation.

[0034] In another possible embodiment, the adjustable cutting tool is pivotably mounted on the milling wheel, with the pivot axis of the adjustable cutting tool preferably being perpendicular to the axis of rotation of the milling wheel. This allows the adjustable cutting tool to fold away from or towards the bearing plate during the transition between the folded and unfolded positions. The pivot axis is preferably provided by a joint, in particular a pivot pin, via which a pivotable part of the cutting tool is pivotably mounted on a base part that is rigidly connected to the outer circumferential side of the milling wheel.

[0035] In another possible embodiment, it is provided that a milling wheel with at least one adjustable cutting tool and a control bar are arranged on opposite sides of the bearing shield, wherein the slot wall milling machine preferably has two bearing shields, each with a pair of milling wheels.

[0036] The invention further relates to a carrier vehicle with a diaphragm wall cutter according to the invention. This results in the same properties and advantages as for the diaphragm wall cutter according to the invention. The carrier vehicle can be, in particular, a cable excavator, but also a mobile crane, a special foundation engineering machine with a mast, or a hydraulic excavator. The carrier vehicle preferably comprises a mobile undercarriage, for example with crawler tracks, and a superstructure rotatably mounted on the undercarriage about a vertical axis, with a swiveling boom or an adjustable mast. The diaphragm wall cutter is, in particular, suspended from the carrier vehicle by a cable, which is guided via one or more pulleys on the boom or mast to a winch on the superstructure.

[0037] Further features, details and advantages of the invention will become apparent from the exemplary embodiments explained below with reference to the figures. The figures show: Fig. 1: An embodiment of the diaphragm wall milling machine according to the invention in a perspective view; Fig. 2: a bearing plate with control bar according to an exemplary embodiment in a perspective view; Fig. 3: An example of the control bar in a perspective view; Fig. 4: An embodiment of the adjustable cutting tool in a front view; Fig. 5: the warehouse sign according to Fig. 2 with milling wheel mounted; Fig. 6a-b: Views of the adjustable cutting tool on the control bar in the folded position; and Fig. 7a-b: Views of the adjustable cutting tool on the control bar in the unfolded position.

[0038] In the Fig. Figure 1 shows an embodiment of the diaphragm wall cutter 10 according to the invention in a perspective view. The diaphragm wall cutter 10 shown in this embodiment comprises a milling frame 11, at the lower end of which several milling wheels 14 are arranged. The milling frame 11 can comprise three frame parts, which can be detachably connected to one another. Alternatively, the milling frame 11 can comprise a larger or smaller number of frame parts or be formed in one piece. The diaphragm wall cutter 10 can be suspended from the top of the milling frame 11 on a support device (not shown).

[0039] At the lower end of the milling frame 11 are two pairs, each with two coaxially arranged or axially spaced milling wheels 14, for removing and crushing soil material. The milling wheel pairs are arranged radially next to each other. The milling wheels 14 are rotatably mounted on bearing plates 12, which are attached to the underside of the milling frame 11. The milling wheels of each milling wheel pair are located on opposite sides of a common bearing plate 12.

[0040] Several cutting tools are arranged on the outer circumferential surfaces of the milling wheels 14, serving to remove and crush soil material. These cutting tools can also be referred to as crushing tools and can each comprise a base body with a recess and a replaceable milling tooth mounted therein. In the embodiments shown in the figures, the base bodies and the milling teeth have a flat shape, although other geometries (e.g., conical cutting tools or milling teeth) are also conceivable.

[0041] The cutting tools must move past the bearing shield 12 during rotation of the respective milling wheel 14 without colliding with each other. To enable the removal of soil material even between the milling wheels 14, in an area adjacent to the narrow sides of the bearing shield 12, the outer cutting tools, which pass directly by the bearing shield 12, are not fixed (i.e., immovably) on the milling wheel 14, but are adjustable. A preferred embodiment of such an adjustable cutting tool 20 without an inserted milling tooth is shown in the Fig. 4 shown in a front view.

[0042] The adjustable cutting tool 20 can pivot about a pivot axis formed by a joint 21 between a folded-in position and an unfolded position and is therefore also referred to as a hinged tooth. In the folded-in position, the adjustable cutting tool 20 is pivoted away from the bearing plate 12 so that it can move past it without collision. In the unfolded position, the adjustable cutting tool 20 is pivoted or unfolded towards the bearing plate 12 so that the milling tooth protrudes into the area next to or below the bearing plate 12 and can remove any soil material present there.

[0043] The adjustable cutting tool 20 can comprise a base body 22 which is pivotably attached to the outer circumference of the milling wheel 14 via the joint 21, in particular to a base part attached to the milling wheel. In the radial direction above the pivot axis or the joint 21, the base body 22 can have a flat upper section with a recess 26 (holder) for a milling tooth 23 (see figure). Fig. 7a). The milling tooth 23 can be inserted into the recess 26 as a replaceable wear part and locked in place.

[0044] On the side of the joint 21 opposite the milling tooth 23 or the recess 26 (i.e. in Fig. 4. The lower part of the adjustable cutting tool 20) contains a guide element 24, which can be formed by a drive arm connected to the base body 22 or formed integrally with it. On the side of the guide element 24 facing the bearing plate 12 (in the Fig. 4 (the right side) there is a contact surface which, in the unfolded position, contacts a control strip 30, which in Fig. 4 is only schematically represented as a dashed box and is described in more detail below.

[0045] The Fig. Figure 2 schematically shows a perspective view of a bearing plate 12 without a milling wheel. It can be seen that the bearing plate 12 carries a rotatably driven milling wheel bearing 13 on each side, on which a milling wheel 14 can be mounted. The bearing plate 12 can have a corresponding gearbox and / or a corresponding rotary drive for driving the milling wheel bearing 13. The bearing plate 12 with the milling wheel 14 mounted is shown in the Fig. 5 shown.

[0046] To move or force the adjustable cutting tool 20 from the folded position to the unfolded position during a rotation of the milling wheel 14, a control bar 30 is attached laterally to the bearing plate 12, which is contacted by the guide element 24 of the adjustable cutting tool 20. The control bar 30 thus acts as a cam bar, which forces the adjustable cutting tool 20 into different pivot positions at specific angles of rotation when the milling wheel 14 is turned.

[0047] The Fig. Figure 3 shows an embodiment of the control bar 30 in a perspective view. The control bar 30 is ring-shaped and comprises, in a first angular region (with respect to the center point of the control bar 30, which coincides with the axis of rotation of the milling wheel bearing 13 or the milling wheel 14), a first section 31 and, in a second angular region, a second section 32, between which a transition section 33 is arranged. The second section 32 corresponds in particular to a known control bar which, in known devices, only partially surrounds the milling wheel bearing. In the upper region, where the adjustable cutting tool 20 is in the folded position, no control bar was provided. In contrast, the control bar 30 according to the invention extends over the full 360° and thus completely surrounds the milling wheel bearing 13.

[0048] In the first angular range, the adjustable cutting tool 20 is in the folded position and in the second angular range in the unfolded position, while in the areas of the transition sections 33 a pivoting movement takes place between the folded and unfolded positions.

[0049] The Fig. Figures 6a-b show an adjustable cutting tool 20 in the folded position on the bearing shield 12, wherein the Fig. 6a a perspective view of the upper area of ​​the bearing shield 12 above the milling wheel bearing 13 and the Fig. 6b shows a front view of it.

[0050] In the Fig. In 7a-b, the adjustable cutting tool 20 is shown in the unfolded position, with the Fig. 7a a side view of the upper part of the bearing shield 12 and the Fig. 7b a perspective view of the upper area of ​​the bearing shield 12 above the milling wheel bearing 13 and the Fig. Figure 7b shows a top view of the adjustable cutting tool 20 on the bearing plate 12.

[0051] As in the Fig. 6b and Fig. As can be seen in Figure 7b, the control strip 30 in the first section 31 has a lower height H1 than in the second section 32. The end faces of the control strip 30 in the first and second sections 31, 32, facing away from the outside of the bearing shield 12, are referred to here as the first control surface 41 and the second control surface 42. Due to the different heights H1, H2, the second control surface 42 is located further away from the bearing shield 12 than the first control surface 41.

[0052] Preferably, the first and second control surfaces 41, 42 are aligned parallel to each other and parallel to the central plane of the bearing shield 12, so that the heights H1, H2 of the first and second sections 31, 32 are constant. The first and second sections 31, 32 transition into each other at the transition sections 33, which are particularly ramp-shaped.

[0053] The adjustable cutting tool 20 is arranged such that the guide element 24 is located at the radial height of the control bar 30 at every milling wheel rotation angle and is adjacent to the respective control surface 41, 42. The adjustable cutting tool 20 is not spring-mounted, allowing it to pivot freely about the joint 21. Due to the relative axial arrangements of the adjustable cutting tool 20 and the control bar 30, the guide element 24 contacts the second control surface 42 of the second section 32 in the second angular range, thus pressing the adjustable cutting tool 20 into the extended position (see Figure 1). Fig. 7a-b). Starting from the folded position, the adjustable cutting tool 20 is engaged by contacting the transition section 33 arranged behind the first section 31 in the direction of rotation (as seen in the Fig. 6a) pressed from the folded position to the unfolded position by the guide element 24.

[0054] After passing through the second angular range, the adjustable cutting tool 20 reaches the other transition section 33 on the opposite side. In order to guide the adjustable cutting tool 20 past the bearing shield 12 without collision, it is pivoted or folded into the folding position shortly before reaching the bearing shield 12, in which the upper flat section of the base body 31 is aligned, in particular, substantially parallel to the side surface of the bearing shield 12 (see Figure 1). Fig. 6b) The folding is achieved in particular by the adjustable cutting tool 20 or its base body 22 contacting the bearing shield 12, thereby pivoting the base body 22. For this purpose, the bearing shield 12 preferably has a transition surface 16 at its rear end (in the direction of rotation), which is contacted and swept over by the first guide element 40. The transition surface 16 is preferably inclined relative to the aforementioned central plane of the bearing shield (see Figure 6b). Fig. 2), so that the adjustable cutting tool 20 in the inlet area is gradually pivoted into the folding position.

[0055] As in the Fig. As can be seen in Figure 6b, the adjustable cutting tool 20 is also guided in the folded position due to the first section 31 of the control bar 30 running there, so that the adjustable cutting tool 20 can only pivot back and forth around the joint 21 by a very limited folding angle of, for example, less than 2° in the first angular section, which leads to less wear and reduced stress.

[0056] In the area of ​​or above the first section 31, a [missing text] can be found on the bearing shield 12. Fig. 2. Only a schematically indicated wear plate 17 is attached. Reference symbol list: 10 slot wall cutters 11 milling frames 12 Storage sign 13 milling wheel bearings 14 milling wheel 16 Transition area 17 Wear plate 20 Adjustable cutting tools 21 joint 22 Basic shapes 23 milling teeth 24 guide element 26 Exclusion 30 control bar 31 First Section 32 Second Section 33 Transition section 41 First control surface 42 Second control surface

Claims

[1] Diaphragm wall cutter (10) with at least one bearing plate (12) and at least one milling wheel (14) rotatably mounted on the bearing plate (12), which has at least one adjustable cutting tool (20) for crushing soil material, wherein a control bar (30) is arranged on the bearing plate (12), with which the adjustable cutting tool (20) mechanically interacts when the milling wheel (14) is rotated, such that it automatically moves between a folded-in position and an unfolded position depending on the milling wheel rotation angle, characterized by , that the control bar (30) is designed as a closed ring and is arranged on the bearing shield (12) in such a way that the adjustable cutting tool (20) moves continuously along the control bar (30) when the milling wheel (14) is rotated. [2] Slot wall milling machine (10) according to claim 1, wherein the bearing shield (12) comprises at least one rotatably driven milling wheel bearing (13) to which a milling wheel (14) is attached, wherein the control bar (30) completely surrounds the milling wheel bearing (13) and is in particular arranged coaxially to an axis of rotation of the milling wheel bearing (13). [3] Slot wall cutter (10) according to claim 1 or 2, wherein the control bar (30) comprises a first section (31) extending in a first angular region and a second section (32) extending in a second angular region, wherein the first and second sections (31, 32) have different and preferably constant heights (H1, H2) with respect to an outside of the bearing shield (12) on which the control bar (30) is mounted. [4] Slot wall milling machine (10) according to claim 3, wherein the control bar (30) is designed and arranged such that the adjustable cutting tool (20) is in the folded position when passing over the first section (31) of the control bar (30) and in the unfolded position when passing over the second section (32) of the control bar (30), wherein the first section (31) is arranged in particular in an upper area between a milling wheel bearing (13) and a milling frame (11) to which the bearing shield (12) is connected, wherein the second section (32) is preferably located below and / or to the side of the milling wheel bearing (13). [5] Diaphragm wall cutter (10) according to claim 3 or 4, wherein the height (H1) of the first section (31) corresponds to 30-70%, preferably 40-60%, particularly preferably approximately 50% of the height (H2) of the second section (32). [6] Slot wall cutter (10) according to one of claims 3 to 5, wherein the first angular region is smaller than the second angular region and / or the first section (31) is arranged completely above an axis of rotation of the milling wheel (14). [7] Slot wall milling machine (10) according to one of claims 3 to 6, wherein the first and second sections (31, 32) have first and second control surfaces (42) on their sides facing away from the bearing shield (12), which can be contacted by the adjustable cutting tool (20) in particular via a guide element (26), wherein preferably the first and second control surfaces (41, 42) run parallel to each other and / or perpendicular to the axis of rotation of the milling wheel (14). [8] Slot wall milling machine (10) according to one of claims 3 to 7, wherein the control bar (30) has transition sections (33) between the first and second sections (31, 32) whose height changes gradually, in particular linearly, between the first and second sections (31, 32). [9] Slot wall milling machine (10) according to one of claims 3 to 8, wherein the first section (31) of the control bar (30) is designed and the adjustable cutting tool (20) is pivotably mounted on the milling wheel (14) and arranged in such a way that the adjustable cutting tool (20) can perform a pivoting movement of a maximum of 5°, preferably a maximum of 3°, particularly preferably a maximum of 2° in the folded position. [10] Slot wall milling machine (10) according to one of the preceding claims, wherein the adjustable cutting tool (20) is not spring-mounted, wherein the adjustable cutting tool (20) and the control bar (30) are arranged and designed such that the movement from the folded position to the unfolded position is effected by contacting the control bar (30) and the movement from the unfolded position to the folded position is effected by contacting the control bar (30) and / or a transition surface of the bearing shield (12) that is preferably chamfered relative to the milling wheel plane. [11] Slot wall cutter (10) according to one of the preceding claims, wherein the control bar (30) is formed in one piece. [12] Slot wall milling machine (10) according to one of the preceding claims, wherein the adjustable cutting tool (20) comprises a guide element (24) via the contacting of the control strip (30) the adjustable cutting tool (20) can be moved automatically from the unfolded position to the folded-in position when the milling wheel (14) is rotated, wherein the guide element (24) is preferably arranged on a side of an interchangeable milling tooth opposite a pivot axis of the adjustable cutting tool (20). [13] Slot wall cutter (10) according to one of the preceding claims, wherein the adjustable cutting tool (20) is designed such that in the folded position it has an axial distance to the bearing shield (12) and can be moved past it and in the unfolded position projects into an area radially next to the bearing shield (12). [14] Slot wall milling machine (10) according to one of the preceding claims, wherein the adjustable cutting tool (20) is pivotably mounted on the milling wheel (14) about a pivot axis, wherein the pivot axis of the adjustable cutting tool (20) is preferably perpendicular to the axis of rotation of the milling wheel (14). [15] Slot wall milling machine (10) according to one of the preceding claims, wherein a milling wheel (14) with at least one adjustable cutting tool (20) and a control bar (30) are arranged on opposite sides of the bearing shield (12), wherein the slot wall milling machine (10) preferably has two bearing shields (12) each with a pair of milling wheels (14). [16] Carrier device, in particular cable excavator or special foundation engineering equipment, with a diaphragm wall cutter (10) according to one of the preceding claims.

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