JUSTICE FACILITY

Description

[0001] The present invention relates to an adjustment device for clamping transport means of a transport device according to the preamble of claim 1.

[0002] In particular, the transport device relates to a so-called crate washer, which is used for cleaning beverage containers. However, it should be noted that the invention described here can also be applied to other transport devices, and in particular to transport devices for transporting crates, boxes, containers, packages, and the like.

[0003] Crate washers have long been a known technology. In these systems, the beverage crates to be cleaned are transported, for example, through an immersion bath and then moved by a rotating conveyor, during which they are simultaneously turned 180 degrees. For transporting these beverage crates, conveyor chains are typically used on both sides, clamping the crates between them and thus holding them securely. For this purpose, some conveyor chains are circulating, to which detachable holding elements are attached.

[0004] JP S59 143805 A shows an endless belt by providing a plurality of pulleys around which the endless belt is wound, one of these pulleys being a tension pulley which is elastically forced in one direction in a system for transporting a pallet with a pair of endless belts.

[0005] JP H07 29348 U relates to a device for automatically adjusting the tension of a conveyor belt in a banknote conveyor.

[0006] US 2007 / 009310 A1 discloses an image-generating device comprising a main unit; an image carrier body; a belt assembly; and a tension-application mechanism. The belt assembly is detachably mounted in the main unit and has a pair of support rollers that carry an endless belt. The endless belt has an inner circumferential side facing the pair of support rollers and an outer circumferential side facing the inner circumferential side. The outer circumferential side of a portion of the endless belt defined between the pair of support rollers along an arrangement direction in which the pair of support rollers is positioned faces the image carrier body when the belt assembly is mounted in the main unit. The tension-application mechanism is provided in the main unit.When the belt unit is mounted in the main unit, the tensioning mechanism pushes one of the support rollers of the pair in a direction that separates one support roller from the other, thereby applying tension to the endless belt.

[0007] JP S56 55206 U relates to an improvement of a belt tensioning device. The device used to apply tension to a belt in a belt conveyor is typically a device such as the one described in FIG. 1 As shown. In this device, the deflection pulley is designed so that it can rotate freely around the drawbar arm, the tip, the upper Kfi constant & j2 / A arm shaft, and the deflection pulley itself. The aforementioned base is mounted at a suitable distance from the drawbar arm on the circular guide and the drawbar arm with a pulley (both ends of which are attached).

[0008] US 6,185,394 B1 discloses an adjustment device with the features of the preamble of claim 1. The said document shows a method for adjusting a tension applied to a photoreceptor strip in a printing device, comprising adjusting the tension applied to the photoreceptor strip according to at least three modes, including a normal printing mode in which the tension is applied to the photoreceptor strip for a printing operation by pushing the tension roller in a predetermined direction, a relaxed tension mode in which the tension of the photoreceptor strip is relaxed by reducing the pressure exerted on the tension roller during the interruption of the printing operation, and a strip change mode in which the tension of the photoreceptor strip is released for changing the photoreceptor strip by removing the pressure exerted on the tension roller.Switching between operating modes involves operating a drive motor that powers a tension adjustment unit to set the tension of the photoreceptor strip; detecting the position of the tension adjustment unit; identifying an operating mode corresponding to the position of the tension adjustment unit; and stopping the drive motor to halt the operation of the tension adjustment unit once the desired operating mode is detected. Therefore, the mode can be switched to the slack-tension mode during an interruption of the printing process, allowing the tension of the photoreceptor strip to be released without damaging it. This prevents partial stiffening and folding of the photoreceptor strip along its curved section.

[0009] GB 2 189 757 A demonstrates that, in chain conveyors, it is necessary to maintain the chain under optimal tension and avoid sudden tension surges, while simultaneously ensuring that the chain scraper / cleaner bar is kept in close proximity to the guide wheels. The bearing housing can slide relative to the conveyor by means of longitudinal bolts over which compressible springs are fitted to achieve the initial chain tension. The tension is maintained by a pawl assembly connected to the bolts via a plate. An L-shaped plate is attached to the bearing housing via the plate and extends through the side of the conveyor's guide structure. At its end adjacent to the grooved wheels, the plate carries a combined chain scraper / groove cleaner plate.

[0010] DE 103 16 630 A1 shows that the conveyor has an endless belt running over the front and rear shafts and driven by the front shaft, which has a diameter between 60 mm and 120 mm. The diameter of the middle part of the shaft is approximately 2–3.5 mm, in particular 2.4–3.5 mm, preferably 2.8 mm larger than the diameter of the two end parts. A centering shaft is located in the deflection area of ​​the belt, in front of the rear shaft and at an angle to the plane of the belt. The rear shaft is part of a tensioning device for the belt. This consists of a tensioning slide with two stops and a spring element.

[0011] JP S55 147309 U relates to an automatic tensioning device in which a chain or belt for a conveyor or the like is always automatically subjected to a suitable tension by means of a spring.

[0012] CN 201 817 034 U discloses a double-layer belt conveyor mechanism comprising a height-adjustable frame with an upper and a lower conveyor. The upper and lower conveyors are oriented to each other; an upper positioning block and a lower positioning block are each mounted on the upper and lower conveyors, respectively, and are oriented to each other; and a height-adjustable positioning bar is mounted between the upper and lower positioning blocks. The double-layer belt conveyor mechanism is ingenious in its structural design, capable of lifting, suction, compacting, shaping, and similar functions for materials that have passed between the upper and lower conveyors. It is convenient to operate and highly efficient in its processing.

[0013] When using conveyor chains, the problem arises that they change over their service life, for example, by stretching. This, in turn, leads to an undesirably high amount of play in these conveyor chains. To counteract this, adjustment elements are known from the prior art, allowing the user to manually retension these conveyor chains. This retensioning is sometimes a complex process, especially since, in applications such as box washing, the conveyor chains are partially submerged or immersed in water.

[0014] The present invention is therefore based on the objective of providing a device that simplifies this adjustment process. This objective is achieved according to the invention by an adjustment device as described in claim 1. Advantageous embodiments and further developments are the subject of the dependent claims.

[0015] An exemplary transport device for transporting goods, and in particular packaging, beverage crates, and the like, comprises a first transport device, which includes a first circulating transport means, and a second transport device, which includes a second circulating transport means, wherein the goods to be transported can be received between these circulating transport means in order to be transported by them. Each of these transport means is guided around at least two deflection wheels, and at least one adjustment device is provided to adjust and / or change the position of at least one of these deflection wheels.

[0016] According to the invention, the adjusting device has a movable support on which the deflection wheel is rotatably arranged, and a first clamping means which pre-tensions this support in a predetermined direction.

[0017] This proposes an automatic adjustment device which preferably does not require readjustment by a user.

[0018] The first clamping device pre-tensions the beam in a direction that increases the tension of the transport device and / or reduces mechanical play between, for example, individual links of the transport device. The clamping device acts on the actuator, which in turn acts on the beam.

[0019] The exemplary transport device can include guide and / or support means for guiding the circulating transport element. Advantageously, the transport device has at least one guide rail for guiding the circulating transport element. For example, a guide rail can be provided in which at least one section of the circulating transport element, such as a section of the chain elements, runs. This guide rail can be designed such that it engages components of the support so that the transport element cannot fall out of the guide rail and essentially moves only in one direction relative to the transport rail.

[0020] In a further advantageous embodiment of the exemplary transport device, at least one deflection wheel is a gear. Advantageously, both deflection wheels are gears. Preferably, the at least one deflection wheel redirects the transport direction of the transport means by an angle of more than 90 degrees, more preferably by more than 120 degrees, more preferably by more than 150 degrees, and most preferably by more than 170 degrees. In an advantageous embodiment, only exactly one adjustment device is provided per transport device. This means that only the position of one of the deflection wheels can be changed.

[0021] In a further advantageous embodiment of the exemplary transport device, the device has a drive for powering at least one deflection wheel. In another advantageous embodiment, the adjustment device is arranged on a second deflection wheel. For example, a first deflection wheel can be arranged above a second deflection wheel. Advantageously, the deflection wheel located above the other deflection wheel is driven, or a drive engages this deflection wheel. The second deflection wheel is preferably driven via the transport mechanism.

[0022] The drive system is advantageously an electric motor drive.

[0023] In a further advantageous embodiment of the exemplary transport device, both transport units have corresponding drive units. Preferably, these two electromechanical drive units are electronically coupled to each other. However, it would also be conceivable that only one drive unit is provided and the other transport unit is coupled via a mechanical coupling device, such as a coupling shaft.

[0024] In a further advantageous embodiment of the exemplary transport device, the transport means moves within a single plane. Preferably, however, the transport means is curved in at least two directions and / or in several planes. One direction is preferably the curvature caused by the deflection wheels, and the other curvature is perpendicular to the first curvature. Advantageously, the transport means is guided in a curved path in sections, but curved in different directions in different sections. With regard to a transport chain, this means that two adjacent chain links are pivoted relative to each other about two different axes, these pivot axes being particularly preferably perpendicular to each other.

[0025] The adjustment device described here is particularly valuable in such a design, where the transport element is guided in a curved path in two directions or planes. In these cases, it is especially important to ensure that excessive tension is not applied to the transport element, as this can lead to very rapid or premature wear of the transport element.

[0026] According to the invention, the pretensioning device is a coil spring. This pretensioning device can thus enable self-adjustment of the transport device.

[0027] As explained in more detail below, the spring force of this preloading device can be chosen very precisely in order to prevent excessive tensioning of the transport device on the one hand and excessive play in the transport device on the other.

[0028] According to the invention, the adjustment device includes a locking mechanism that at least partially prevents the carrier from retracting in the opposite direction. It is assumed that the transport element will expand over time by a certain amount, and this expansion is compensated for by the adjustment device. To prevent the carrier from retracting or the play in the transport element from increasing during operation, the locking device described here is used.

[0029] According to the invention, this locking device has a ratchet mechanism. The locking device has a gear into which a mating gear engages in order to hold certain positions maintained or achieved by the preloading device. The locking device is releasable and, in particular, can be released manually. Thus, for example, when changing the transport device, the carrier can also be reset.

[0030] According to the invention, the adjusting device has a further preloading means for loading the locking device or an element of the locking device. In particular, but not exclusively, a further spring can serve as this additional preloading means.

[0031] In this way, a further pre-tensioning mechanism is preferably provided.

[0032] In a further advantageous embodiment of the exemplary transport device, the circulating transport means is a transport chain. Advantageously, retaining elements for holding the objects or boxes are arranged on this chain. These retaining elements can be made of plastic. In a preferred embodiment, these retaining elements are at least partially elastic or have elastic sections. It is possible that these retaining elements are detachably attached to the chain links.

[0033] Advantageously, the retaining elements are arranged on supports. These supports can also be made of plastic. The supports are also preferably arranged on the aforementioned chain.

[0034] In a further advantageous embodiment of the exemplary transport device, the holding elements have projections pointing towards the objects. These individual projections are particularly preferably bendable. Advantageously, gaps are formed between the individual projections. The objects to be transported can preferably be conveyed between the holding elements of two opposing transport devices.

[0035] In a further advantageous embodiment, the clamping device pre-tensions the beam with a force that is less than 200 N, preferably less than 150 N, more preferably less than 100 N, more preferably less than 60 N, and particularly preferably less than 50 N. In a further preferred embodiment, the clamping device pre-tensions the beam with a force that is greater than 10 N, more preferably greater than 20 N.

[0036] As mentioned above, the magnitude of this force is very important. Extensive investigations have allowed us to determine the force ranges mentioned above. These are particularly suitable for minimizing chain wear and for keeping the play between the chain links and the drive sprocket to a minimum.

[0037] Advantageously, the chains or transport devices also transport the objects in a vertical direction or with a directional component in the vertical direction. In this case, the transport device should have a certain amount of play, particularly in its lower section.

[0038] In a further advantageous embodiment, the support on which the deflection wheel is rotatably mounted is movable in a straight line. This allows the support to be moved and the transport device readjusted in a particularly simple manner. Preferably, this support is readjusted relative to a main support, and especially relative to the main support on which the transport device itself is mounted.

[0039] According to the invention, the adjusting device has a rotatable actuator that acts mechanically on the support. This rotatable actuator is mounted eccentrically, so that when the actuator rotates about its axis of rotation, the support can be moved. Therefore, the rotation of the actuator triggers a movement of the support. As mentioned, the actuator is a rotatable body mounted about an axis of rotation and is eccentrically mounted. The aforementioned preloading device acts on this actuator and forces it in a predetermined direction. Since the actuator, in turn, acts on the support, the preloading device thus affects the movement of the support.

[0040] A non-inventive embodiment of a transport device for transporting objects comprises a circulating transport means for transporting the objects, wherein this circulating transport means is guided around at least two deflection wheels and wherein at least one adjustment device is provided for adjusting the position of at least one of these transport wheels or deflection wheels. According to the invention, this adjustment device comprises a movable support on which the deflection wheel is rotatably arranged, and an actuating element for adjusting this movable support, wherein the actuating element is designed as an eccentrically rotatable actuating element which acts on this support during a corresponding rotational movement.

[0041] In this non-inventive embodiment, the clamping device mentioned above can optionally be omitted. Furthermore, the adjustment device preferably includes a locking mechanism that at least partially prevents the carrier from retracting against the predetermined direction.

[0042] Another non-inventive embodiment of a transport device for transporting objects has a circulating transport means which serves to transport the objects, wherein this circulating transport means is guided around at least two deflection wheels and wherein at least one adjustment device is provided to adjust the position of at least one of these transport wheels or deflection wheels.

[0043] The adjusting device of this non-inventive embodiment comprises a movable support on which the deflection wheel is rotatably mounted, and a first clamping means which pre-tensions this support in a predetermined direction. Furthermore, the adjusting device comprises a locking means which at least partially prevents the support from returning to its original position in the opposite direction.

[0044] Therefore, with regard to the transport device not according to the invention, it is also proposed that, on the one hand, a pre-tensioning element is provided which pushes the carrier in a certain direction, and on the other hand, a locking means is provided which prevents this carrier from being reset against the direction of the push.

[0045] The transport device described here, which is not according to the invention, can be used in particular for circulating transport means and especially for chains or belts. The transport device is advantageously designed in the manner described above.

[0046] A device for cleaning objects, and in particular beverage crates, is also shown, although not claimed as part of the invention. This device comprises at least one exemplary transport device of the type described above. Furthermore, the device comprises an application device for applying a flowable, and in particular a liquid, cleaning agent to the objects during transport. In a further advantageous embodiment, the exemplary device comprises a liquid bath through which the objects are conveyed, at least temporarily. In a further advantageous embodiment, at least one section of the transport device is arranged, at least temporarily and preferably permanently, within the liquid of this immersion bath.

[0047] Further advantages and embodiments can be seen from the attached drawings.

[0048] It shows: Fig. 1a A device for cleaning beverage crates (not claimed here as part of the invention); Fig. 1b A top view of the in Fig. 1a Device shown (not claimed here as according to the invention); Figs. 2a - 2d Four representations of a transport device for transporting objects; Figs. 3a, 3b Two representations of a transport device; Fig. 4 A detailed view of an adjustment device according to the invention; Fig. 5 A top view of a transport device; Fig. 6 A sectional view of the device shown in Fig. 5 The deflection device shown in Fig. 7 is a sectional view of the deflection device shown in Fig. 7. Fig. 4 shown adjustment device.

[0049] Fig. 1a Figure 1 shows a device 100 for cleaning beverage crates 10. The beverage crates are fed in on the left side and first enter an immersion bath 102. This immersion bath 102 is a turbulent immersion bath I, through which the beverage crates 10 are initially conveyed. Reference numeral 1 denotes a transport device, which here is designed as an upward turner. This device turns the beverage crates 180 degrees and also conveys them to a higher level.

[0050] In this central area II, the main cleaning of the beverage crates takes place. For this purpose, the beverage crates are treated or sprayed with a cleaning agent. Reference numeral 104 denotes a transport device, such as a conveyor belt in this case, which connects to the transport device 1. A second transport device 1 connects to this conveyor belt 104. Reference numerals 110 and 112 denote spray devices or treatment devices, in this case spray nozzles, which treat the beverage crates with liquid. These treatment devices are preferably at least partially stationary. In area III, a final alkaline cleaning preferably takes place. Reference numeral IV denotes a drip zone, and reference numeral V denotes a rinse with fresh water. Reference numeral VI denotes a drip zone.

[0051] The beverage crates are then removed from the device by means of another transport device, such as a conveyor belt 106. It can be seen that the lower transport device 1 is partially below the liquid level 102. Manual adjustment of this transport device 1, in particular, is relatively complex.

[0052] Fig. 1b Figure 1a shows a top view of the device shown in Figure 1. The beverage crates 10 are again visible, being conveyed from left to right within the liquid channel. A pressure-generating device 116 is provided, which creates a flow within the central part of the liquid channel. It can be seen that the transport device 1 has a first transport unit 2 and a second transport unit 4, between which the beverage crates 10 are received.

[0053] Figur 2a Figure 1 shows a side view of a transport device 1. The beverage crates 10 are again visible, being conveyed between the transport device 4 shown here and another (behind and therefore not visible) transport device. Reference numeral 42 denotes a circulating transport element that is part of the transport device 4. Holding elements, which, as mentioned above, are elastic and serve to securely hold the beverage crates 10, can be arranged on this transport element or transport chain. Reference numeral 15 denotes a drive device that serves to drive the circulating transport element 42.

[0054] The (not shown) further transport device 2 also has such a drive device. These can be electronically coupled or synchronized with each other.

[0055] Reference numeral 82 designates an adjusting device with which the lateral distance between the transport devices 2 and 4 can be changed. In this way, adjustment can be made for different box widths.

[0056] Fig. 2b Figure 1 shows another illustration of a transport device. In this illustration, both transport devices 2 and 4 are visible, which hold the beverage crates 10 between them. Reference numeral 62 identifies the sliding support, which is part of the adjustment device 6. The adjustment device 82, which serves to laterally adjust the two transport devices 2 and 4, is also shown here.

[0057] Figur 2c shows a front view of a transport device 1. Here too, the two transport devices 2 and 4 are visible, which hold the beverage crates 10 between them.

[0058] Fig. 2d Figure 1 shows a top view of the transport device. The actuator, designated 70 in its entirety, is also visible here; it changes the lateral distance between the two transport devices 2 and 4. Reference numerals 22 and 42 refer to the circulating transport means, the transport chains, on which (not shown) holding devices for the beverage crates 10 are arranged. Reference numerals 23 and 43 each designate an upper support that serves to carry the circulating transport means, i.e., the transport chains.

[0059] Figur 3a Figure 1 shows a representation of a transport device 2. The circulating transport means 22 is again visible. Reference numeral 25 denotes an upper deflection wheel around which the transport means 22 is deflected. Reference numeral 18 denotes a rotatable bolt to which a drive device can be attached to drive the deflection wheel 25.

[0060] Reference numeral 6, in its entirety, designates the adjustment device for readjusting or retensioning the transport means 22. This device includes a sliding support 62, which is movable in the direction R to slightly increase the chain tension and / or reduce play between the individual chain links. Reference numeral 66 designates a ratchet or pawl element, which, as explained in more detail below, prevents the sliding element or the sliding support 62 from retracting. Reference numeral 68 designates a longitudinal groove within which the support 62 is movable.

[0061] Fig. 3b shows a side view of the in Fig. 3a The transport device shown. Here, the support 30, which guides the transport element (not shown), is also visible. Reference numeral 32 designates a transport groove within which the guide elements of the transport element can run. The design shown here, in which the transport chain is curved both in one direction perpendicular to the plane of the figure, namely around the deflection pulleys 24 and 25, and with respect to its direction of extension, i.e., within the plane of the figure, makes it clear that excessive chain tension should be prevented, as otherwise the friction losses, particularly in the lower area of ​​the groove 32, would be too high. Reference numeral 36 designates a main support for carrying the support 30.

[0062] Fig. 4 Figure 1 shows a detailed representation of the adjustment device 6 according to the invention. Here, the movable support 62 is again shown, on which (not shown) the deflection wheel 24 is arranged. This support 62 is displaceable in the direction R in the grooves 68. The deflection wheel 24 is visible through the grooves 68. Reference numeral 70 designates a main support relative to which the support 62 is displaceably arranged. Reference numeral 76 designates an actuating element, which is designed as a wheel mounted eccentrically with respect to a rotational axis D.

[0063] Reference numeral 64 designates a clamping device, which is designed as a coil spring and is articulated to a bolt 74, which in turn is integrally connected to the actuating element 76. The clamping device 64 causes the rotatable actuating element 76 to move counterclockwise and thus push the movable support 62 to the left.

[0064] Reference numeral 76a refers to an external toothing arranged on an actuator 76. A toothing 66a of a locking element 66 can engage in this external toothing. This locking element, in turn, is loaded by a further clamping device 75 in such a way that a return movement of the actuator 76, i.e., a clockwise rotation, is prevented. In this way, once the support 62 has been adjusted to the right, it cannot be reversed by changes in the load.

[0065] According to the invention, when exchanging a means of transport, it is possible to release this ratchet mechanism 68 in order to return the actuator 76 to its initial position. Reference numeral 72 designates a circular groove in which a bolt 73 runs to guide the rotary movement of the actuator 76 in a defined manner. This bolt 73 also serves as an end stop to define an end position of the actuator 76.

[0066] Fig. 5 shows a lower view of the transport device shown in the upper figures.

[0067] Here too, an actuator 77 is provided, which is eccentrically mounted, in the same way as the one in Fig. 4 The actuator 76 shown is mechanically coupled to the actuator 76 mentioned above. Reference numeral 62a again designates a displaceable carrier which, according to the invention, is displaceable within the grooves 68 and in direction R. It is possible and preferred that the movement of the carrier 62a is coupled to the movement of the carrier 62.

[0068] Fig. 6 Figure 1 shows a sectional view of the transport device in the area of ​​the upper drive. The drive shaft 18, on which the deflection wheel 25 is located, is again visible. Reference numeral 54 indicates a holding element used to hold the beverage crates (see Figure 54). Fig. 1 ) serves. This retaining element is arranged on a support 55, and this in turn is attached to the chain, which runs around the deflection wheel 25, which here is designed as a gear. This support 55 is located in the Fig. 3b The groove shown is 32.

[0069] Fig. 7 shows a cross-sectional view of the in Fig. 4 The adjustment device shown. Here again, the movable support 62 is visible, the position of which can be changed by the actuator 76. The reference numeral D again indicates the axis of rotation about which the actuator 76 can rotate. More precisely, a rotating shaft 79 is also provided here.

[0070] The reference numeral 65 identifies the shaft on which the gear 24 is rotatably mounted.

Claims

1. Adjustment device (6) for tensioning transport means (22, 42) of a transport device (1), wherein the adjustment device (6) can be connected to the transport means (22, 42), with a first transport device (2) which has a first circulating transport means (22) and a second transport device (4) which has a second circulating transport means (42), wherein the goods (10) to be transported can be received between these circulating transport means (22, 42) and transported by them, wherein each of these circulating transport means (22, 42) is guided around at least two deflection wheels (24, 44), wherein the adjustment device (6) comprises a carrier (62) on which a deflection wheel (24) can be rotatably arranged, wherein this carrier (62) is arranged so as to be displaceable relative to a base carrier (70), and the adjustment device (6) has a movable actuator (76) which acts mechanically on this carrier (62), wherein the adjustment device further comprises a first tensioning means (64) which loads the actuator (76) in a predetermined tensioning direction (R), wherein the adjustment device comprises a locking means (66) which at least partially prevents the carrier (62) from being reset against the predetermined tensioning direction (R), and wherein the first tensioning means (64) pretensions the carrier (62) in the predetermined tensioning direction (R), characterized in that the carrier (62) can be displaced in the tensioning direction (R) in grooves (68), and wherein the deflection wheel (24) is recognizable through the grooves (68), wherein the actuator (70) is designed as a wheel mounted eccentrically with respect to an axis of rotation (D), and wherein the tensioning device (64), which is designed as a spiral spring and is connected to a bolt (74) of the adjustment device (6), which in turn is connected in one piece to the actuator (76), causes the rotatable actuator (76) to move counterclockwise, thereby pushing the movable carrier (62) to the left, i.e. in the tensioning direction (R), and wherein an external toothing (76a) is arranged on the actuator (76), wherein a toothing (66a) of the locking means (66) engages in this external toothing (76a), and wherein the locking means (66) is in turn loaded by a further tensioning means (75) of the adjusting device (6) in such a way that a return of the actuator (76), i.e., clockwise rotation, is prevented, so that in this way, once the carrier (62) has been adjusted, i.e., to the right against the tensioning direction (R), this adjustment can no longer be reversed when the loads change, and when a transport means is replaced, it is possible to release this ratchet mechanism in order to return the actuator (76) to its initial position, and wherein the actuator (76) has a circular groove (72) in which a bolt (73) of the adjustment device runs in order to guide the rotational movement of the actuator (76) in a defined manner, wherein the bolt (73) serves as an end stop to define an end position of the actuator (76).

2. Adjustment device (6) according to claim 1, characterized in that the tensioning device preloads the carrier (62) with a force that is less than 200 N, preferably less than 150 N, preferably less than 100 N, preferably less than 80 N, preferably less than 60 N, and preferably less than 50 N, and / or the tensioning means (64) pretensions the carrier (62) with a force greater than 10 N, preferably greater than 20 N.

3. Adjusting device (6) according to at least one of the preceding claims, characterized in that the carrier (62) is displaceable in a straight line.