Lifting systems for semi-trailers with saddle tractors, logistics warehouses and logistics systems for truck platoons

Abstract

The invention relates to a lifting system (1) for a semitrailer (5) of a saddle-type traction train (4), comprising a lifting mechanism (11), by which the semitrailer (5) can be moved between a connection position and a disconnection position with respect to a surface (7) of a base member (8) on which the semitrailer (5) is mounted, wherein in the connection position, a connecting member (15) of the semitrailer (5) is arranged at a connection height higher than the surface (7) of the base member (8); and in the disconnection position, the connecting member (15) is arranged at a disconnection height higher than the surface (7) of the base member (8). A surface section (10) of the base member (8) is assigned to the lifting mechanism (11) and is thereby designed to be adjustable in height, so that the semitrailer (5) can be moved between the connection position and the disconnection position by adjusting the surface section (10). The invention also relates to a logistics operation device (2) for a truck convoy and a logistics system (3).

Description

Technical Field

[0001] The invention relates to a lifting system for a semitrailer of a saddle-hauled train according to claim 1. In addition, the invention relates to a logistics warehouse for a truck platoon according to claim 7. In addition, the invention relates to a logistics system having a truck platoon and a logistics warehouse according to claim 10. Background Art

[0002] In the field of goods or article transport, there is now a general pursuit of increasingly automated logistics vehicles or transport vehicles, wherein the overall aim is to automate the logistics or goods flow from the manufacturer to the end consumer or end user as completely as possible. As a result, more and more autonomous trucks will participate in road traffic in the future.

[0003] Each truck can be designed as a multi-section combination train, which consists of a tractor with a loading surface and a trailer with another loading surface. The tractor and trailer of the multi-section combination train can be connected or connected to each other through a connecting device such as a trailer connector. Alternatively, each truck can be designed as a saddle traction train, which consists of a saddle tractor and a semitrailer. In this case, the saddle tractor does not have a loading surface, and the trailer is designed as a semitrailer. The saddle tractor and the semitrailer are connected or can be connected to each other through a semitrailer connector. If the saddle tractor participates in traffic alone, that is, without a semitrailer, the saddle tractor is a car, or more precisely, a self-propelled working machine.

[0004] In order to separate the tractor train into individual vehicles, namely the tractor and the semitrailer, it is necessary to support the semitrailer on the ground where the tractor and the semitrailer are placed, so that once the tractor is driven out from under the semitrailer, the end of the semitrailer that is or can be directed toward the tractor does not tip toward the ground. Because in the connected state, the end of the semitrailer that is directed toward the tractor is placed on the saddle plate of the tractor, whereby the semitrailer of the tractor train is placed on the ground via the wheels of the semitrailer and the wheels of the tractor. In order to support the semitrailer on the ground in the uncoupled state so that, for example, the loading surface of the semitrailer extends at least substantially parallel to the ground, each semitrailer usually has a support unit that can be placed in a supporting position to uncouple the tractor. When the strut unit is brought into the supporting position, the tractor is at least partially freed from the trailer so that after the trailer coupling is opened, it can be driven out from under the trailer, wherein the trailer is supported by the strut unit and its wheels and rests in a stable position on the ground.

[0005] With regard to the increasing automation of goods flows or material flows, it is therefore necessary to largely automate the adjustment of the support units of the trailers that are involved in the goods flow or material flow to be automated.

[0006] For this purpose, for example, DE 10 2006 061 412 A1 discloses a semitrailer which is placed upright on the front side by means of a pillar which can be moved out in an automatic manner. In order to automatically engage the process, the pillar is automatically moved in in this common semitrailer. Since the trailer designed according to the common semitrailer continuously carries the pillar unit in the vehicle, the common trailer is designed to be particularly heavy due to the common pillar unit. However, this is not conducive to very favorable fuel efficiency or energy efficiency and low emissions, especially with respect to a tractor and / or semitrailer that can be at least partially electrically driven or move forward. This leads to frequent or very long parking times to refuel the tractor or semitrailer or supply driving power, because the weight of the tractor or semitrailer is very high due to the common pillar unit, which results in higher energy consumption for moving the tractor or semitrailer forward. However, such parking times are undesirable because they hinder very high cargo flow speeds or logistics speeds. Summary of the invention

[0007] The object of the present invention is to allow a very efficient and, in particular, automated or automatable flow of goods or logistics.

[0008] According to the invention, this object is achieved by a lifting system having the features of claim 1. In addition, this object is achieved by a logistics warehouse having the features of claim 7. In addition, this object is achieved by a logistics system having the features of claim 10. The features, advantages and advantageous designs of the lifting system of the invention should be regarded as the features, advantages and advantageous designs of the logistics operation equipment of the invention or the logistics system of the invention, and vice versa. The features, advantages and advantageous designs of the logistics operation equipment of the invention should be regarded as the features, advantages and advantageous designs of the logistics system of the invention, and vice versa. Advantageous designs with appropriate inventive improvements are described in the dependent claims.

[0009] According to the present invention, a lifting system for a semitrailer of a saddle traction train is provided. The saddle traction train has a saddle tractor and a semitrailer, wherein the saddle traction train is formed in such a way that the semitrailer and the saddle tractor are connected to each other. Here, the saddle tractor has a drive unit of the saddle traction train, which means that the semitrailer can be driven or moved forward with the help of the drive unit of the saddle tractor. It can be provided that the semitrailer has another drive unit, whereby the semitrailer can be independently dispatched within a limited range and / or the driving operation of the saddle traction train performed with the help of the drive unit of the saddle tractor can be supported. This means that the drive unit of the saddle tractor is the main drive unit of the saddle traction train, wherein the drive unit of the semitrailer (if any) is a secondary drive unit.

[0010] If the semitrailer is put into use as specified, it is placed on the surface of the base part by the wheel set, especially the rear wheel set. The base part can be, for example, a road surface, so that the surface of the base part is represented by the road surface. Therefore, the semitrailer is placed on the surface of the base part at the rear side, that is, at the end facing away from the saddle tractor, and rolls on the surface of the base part by the rear wheel set during the driving operation of the saddle traction train or semitrailer. If the semitrailer and the saddle tractor together form a saddle traction train, that is, the saddle tractor and the semitrailer are connected to each other, the semitrailer is placed on the surface of the base part by the wheel set of the saddle tractor, especially the rear wheel set. The semitrailer is therefore placed on the surface of the base part by the saddle tractor at the end facing the saddle tractor, because the end of the semitrailer facing the saddle tractor is supported on the saddle tractor, especially the saddle plate of the saddle tractor.

[0011] In order to separate the semitrailer and the saddle tractor from each other, the semitrailer is therefore supported or lifted up on the surface of the base part separately from the saddle tractor at least at one end of the semitrailer supported on the saddle tractor, so that the saddle / semi-trailer connector between the saddle tractor and the semitrailer can be separated, and then the saddle tractor can be driven out under the semitrailer without the semitrailer being unfavorably tilted toward the surface of the base part. For this purpose, a lifting mechanism is provided in the lifting system, whereby the semitrailer can be adjusted between the connection position and the separation position relative to the surface of the base part. If the semitrailer is arranged in the connection position, the connecting parts of the semitrailer, such as the connecting journal (which can also be called the central journal or the saddle journal), are arranged at a height level, which corresponds to the height level of the connecting parts of the saddle tractor corresponding to the semitrailer connecting parts, such as the connecting journal seat. This means that at least when the semitrailer and the saddle tractor are engaged with each other by means of the semitrailer connector, the semitrailer is placed in the connection position. In other words, in the connection position, the semitrailer connecting part is placed at a connection height higher than the surface of the base part. If the semitrailer is brought into the uncoupled position, the coupling element or the center journal or the saddle journal is arranged at a level which is higher relative to the surface of the base element than the level of the coupling position. This means that the semitrailer is lifted in the uncoupled position relative to the coupling position at least at one end facing the saddle tractor.

[0012] Because the height level of the semitrailer connecting piece placed in the separation position is higher than the height level of the connection position, the saddle tractor is at least disconnected from the semitrailer in the following manner, that is, the saddle tractor can drive out of the semitrailer after the semitrailer connector is opened without pulling the semitrailer in an undesirable manner. Therefore, the separation position is provided for dividing the saddle traction train into two independent vehicles of the saddle traction train, that is, into the saddle tractor and the semitrailer. In addition, the separation position is provided for allowing two independent vehicles to engage with each other, because the saddle tractor is allowed to travel under the semitrailer without pushing or moving it in the separation position of the semitrailer. Therefore, if the saddle tractor travels under the semitrailer when the semitrailer is adjusted to the separation position and the connecting piece seat of the semitrailer and the saddle tractor are at least roughly aligned with each other, the semitrailer and the saddle tractor are connected to form a saddle traction train when the semitrailer is adjusted from the separation position to the connection position. Accordingly, in the disconnected position, the connecting piece or the center journal or the saddle journal of the semitrailer is arranged at a disconnected height above the surface of the base member, thereby allowing the saddle tractor to be maneuvered under the semitrailer, such as the connection and / or disconnection of a saddle tractor train.

[0013] In order to realize a particularly efficient and especially automated cargo flow or logistics, the present invention provides that the lifting mechanism of the lifting system is at least partially, especially mostly, formed outside the saddle traction train. Specifically, the present invention provides that at least one surface segment of the base member is assigned to the lifting mechanism and is thereby designed to be adjustable in height. This means that the entire surface of the base member is formed by a surface segment belonging to or assigned to the lifting mechanism and at least one surface segment that is simply assigned to the base member and has nothing to do with the lifting mechanism. The surface segment that is simply assigned to the base member and has nothing to do with the lifting mechanism is especially fixedly arranged. In this case, the surface segment assigned to the lifting mechanism is designed to be adjustable in height relative to those surface segments assigned to the base member or the surface segment assigned to the base member. Thus, the semitrailer can move between the connection position and the separation position when the surface segment of the lifting mechanism is adjusted. That is, because the height or height level of the surface segment assigned to the lifting mechanism is adjustable by means of the lifting mechanism, the semitrailer can move between the separation position and the connection position by the lifting mechanism and the corresponding surface segment.

[0014] For example, the lifting mechanism has an actuator unit including at least one actuator, so that the semitrailer can be rotated between a connection position and a disconnection position by means of a correspondingly adjustable actuator unit. This is because the rear wheelset of the semitrailer remains mounted on the surface of the base part in both the connection position and the disconnection position. The wheelset of the semitrailer is mounted on the semitrailer frame so as to be rotatable about the transverse axis of the semitrailer in order to compensate for the slope / gradient and / or height level of different saddle plates. The actuator unit is preferably motor-driven, so that the user of the lifting system can trigger or control the adjustment of the actuator unit and thus the semitrailer, for example, by means of an electric or electronic operating element (such as a switch or a key, etc.). For this purpose, the actuator unit has at least one fluid-mechanically driven actuator and / or a fluid-free actuator, in particular a linear actuator. This means that the actuator unit has the at least one hydraulic actuator (hydraulic actuator, which can also be called a hydraulic cylinder), at least one pneumatic actuator (pneumatic actuator, which can also be called a pneumatic cylinder) and / or at least one electromechanical actuator (such as a rack and pinion mechanism, a pulley block or other type of linear actuator). Hybrid forms of the described actuator principles are also conceivable.

[0015] By forming the lifting mechanism of the lifting system at least outside the saddle traction train, especially outside the semitrailer, a very small total weight of the saddle traction train is obtained, because the semitrailer does not contain the lifting mechanism of the lifting system. In this way, the semitrailer and the saddle traction train can be operated in a particularly fuel-efficient or energy-efficient and / or emission-less manner. In particular, when the saddle tractor and / or semitrailer are designed to be at least partially electrically driven or forward, this advantageously causes the saddle traction train to have a very high effective distance under a certain capacity of the electric energy storage device of the saddle traction train, such as the traction battery. This in turn causes a very short parking time for refueling and / or charging of the saddle traction train, thereby ensuring a very high cargo flow speed or logistics speed. In this regard, the lifting system is therefore suitable for realizing a particularly efficient and especially automated or automatable cargo flow or logistics mechanism. In addition, it is advantageous in the lifting system that it is compatible with common semitrailers, regardless of whether the semitrailer is equipped with a common support unit.

[0016] In other designs of the lifting system, it has a position sensor device, by means of which the current position of the semitrailer's support unit relative to the lifting mechanism can be measured, wherein the lifting mechanism can be allowed and / or prevented from moving by the lifting system based on the current position of the support unit relative to the lifting mechanism. Thus, for example, it is provided that in the lifting system, the lifting mechanism is only released when the current position of the semitrailer's support unit coincides with a predetermined or predeterminable target position of the support unit. In this case, the target position has the following characteristics in particular: a safe or reliable adjustment of the semitrailer between the connected position and the disconnected position is ensured. Correspondingly, it can also be provided that as soon as the current position of the semitrailer's support unit is separated from the target position of the support unit, the semitrailer is prevented by the lifting system by means of the adjustment of the lifting mechanism.

[0017] For this purpose, the position sensor system has in particular at least one position sensor, by means of which the actual or current position of the support unit relative to the lifting mechanism can be detected, sensed or detected. In particular, the position sensor is a radar sensor and / or a camera sensor. Alternatively or additionally, it is conceivable that the position sensor operates according to other sensor principles (e.g. inductively, magnetically, capacitively and / or conventionally photoelectrically, etc.).

[0018] The position sensor system ensures particularly reliable adjustment of the trailer between the uncoupled position and the coupled position, since adjustment of the lifting mechanism by means of the lifting system is blocked, for example, by the control unit, if the trailer or its support unit is not positioned correctly relative to the lifting mechanism. As a result, the risk of accidents when the trailer is moved between the uncoupled position and the coupled position is advantageously low, thereby increasing the work safety of personnel working on the lifting system and / or on the trailer.

[0019] It has also been proven to be advantageous in relation to the position sensor system that the position sensor system is at least partially placed in / among the saddle tractor of the saddle traction train. For example, the position sensor system includes at least the (previously mentioned first) position sensor on the saddle tractor. This means that the lifting system is at least partially formed on the saddle traction train, especially on the saddle tractor. In other words, the lifting system has at least one component that is far away from the lifting mechanism in this case. It is particularly advantageous that the first position sensor on the saddle tractor is designed as a "rearward-looking" sensor. In other words, the first position sensor is placed at one end of the saddle tractor facing the semitrailer, that is, at the tail of the saddle tractor, and is, for example, aligned with the surface of the base member, on which the saddle tractor is placed or on which the saddle tractor travels. The sensor formed on the saddle tractor of the position sensor system and / or the surface section assigned to the lifting mechanism are designed so that when the saddle tractor travels over the surface section assigned to the lifting mechanism, it is detected or identified by means of the sensor on the saddle tractor. If the distance extending parallel to the surface between the tractor vehicle sensor and the semitrailer support unit is now provided to a control unit of the position sensor system, for example a control unit of the lifting system, then the control unit can, for example, calculate with the aid of the control unit how far the tractor vehicle has to move after the tractor vehicle has passed the lifting mechanism so that the actual position of the semitrailer support unit relative to the lifting mechanism coincides with the target position of the semitrailer support unit.

[0020] Since the position sensor system is at least partially formed or arranged on the tractor, the lifting system can be used very flexibly or diversely and can be adapted in particular to a number of tractors of different configurations. In addition, the lifting system can then be adapted to a number of semitrailers of different configurations. This means that the lifting system can be operated in accordance with regulations with a number of tractor train combinations, wherein the conversion costs or equipment costs are advantageously limited to "equipping the tractor with the (first) position sensor".

[0021] The control unit of the lifting system is in particular at least partially formed on / in the tractor. In this case, the control unit of the lifting system comprises, for example, a computing unit which is coupled or can be coupled to a position sensor system, in particular a first position sensor, which is advantageously formed or arranged on / in the tractor. It can also be provided that the control unit of the lifting system has another (second) computing unit which is designed to control the lifting mechanism, wherein the two computing units are in particular interconnectable or connectable to each other in a cableless / wireless manner. To this end, each computing unit has a data transceiver, wherein the data transceivers correspond to each other, so that the first computing unit arranged at / in the tractor and the second computing unit arranged outside the tractor can be placed in data communication with each other, at least in order to adjust the semitrailer between the disconnected position and the connected position.

[0022] As an alternative or supplement to the position sensor system at least partially placed at / in the saddle tractor, it can be provided in other designs of the lifting system that the position sensor system is at least partially placed at / in the lifting mechanism. For example, the position sensor system then includes at least another (such as a second) position sensor on the lifting mechanism. With the help of the second position sensor, the support unit of the semitrailer can be detected at least in the following case: the saddle traction train is positioned relative to the lifting mechanism, that is, the support unit of the semitrailer is already in the target position, and the reliable adjustment or rotation of the semitrailer between the separation position and the connection position can be achieved as required. For example, once the support unit is arranged at the target position, the second position sensor can provide a corresponding sensor signal. In addition, it can be provided that when the actual position of the support unit has not yet coincided with the target position, the second position sensor has detected the support unit of the semitrailer. So, for example, it can be imagined that the second position sensor provides a corresponding sensor signal, which represents the driving distance that the saddle traction train has to travel in order to place the support unit of the semitrailer at the target position to adjust the semitrailer.

[0023] If both a first position sensor and a second position sensor are used in the lifting system, this allows a particularly precise positioning of the trailer relative to the lifting mechanism. In addition, a plausibility check can be performed based on the two position sensors, for example by means of a control unit of the lifting system, as to whether the strut unit of the trailer is currently positioned in the target position. Thus, if one of the two position sensors has a malfunction and erroneously sends a sensor signal that the strut unit of the trailer is already positioned in the target position, but this is not actually the case, this can be checked or verified based on the sensor signal of the other position sensor. In this case, it can then be provided that a fault signal is provided by means of the control unit in order to signal that, for example, maintenance personnel should check the current position of the strut unit of the trailer.

[0024] If only the second position sensor, ie the position sensor arranged on the hoisting mechanism, is used in the hoisting system, this has the advantage that the hoisting system can be operated in accordance with the requirements together with the hoisting train without any conversion measures having to be taken on the hoisting train.

[0025] According to another embodiment of the lifting system, it has another (second) lifting mechanism that is different from the first lifting mechanism, whereby the base member and the first lifting mechanism can be raised and lowered between the first lifting rail plane and at least another lifting rail plane. The lifting system thus has multiple functions. On the one hand, the lifting system is designed to assist the separation of the saddle tractor and the semitrailer and the mutual engagement of the saddle tractor and the semitrailer in a particularly efficient manner with the help of the first lifting mechanism. On the other hand, because of the second lifting mechanism, the lifting system is then designed to transport the semitrailer at least between the first lifting rail plane and at least another lifting rail plane, in particular in the vertical direction or along a line parallel to the vertical axis of the semitrailer vehicle. This means that the second lifting mechanism forms a lifting device for the semitrailer.

[0026] This is advantageous in that the lifting system is designed to be particularly space-efficient and enables the coupling or uncoupling of the tractor trains and the placement of the semitrailer on another lifting rail level in a particularly small space or on a very small site. This allows for particularly efficient site and / or space utilization, especially in densely built areas. This allows, for example, for the tractor train and the semitrailer to be uncoupled from each other on a first lifting rail level, such as the ground floor, and then for the semitrailer to be lifted to a second lifting rail level, such as the first floor, by means of a second lifting mechanism in order to unload or load the semitrailer there.

[0027] According to another embodiment of the lifting system, it has a signal providing unit, by which a status signal can be provided to the saddle traction vehicle of the saddle traction train, and the status signal represents the current state of the lifting system. The respective / current states of the lifting system (for which the signal providing unit provides corresponding status signals) include, for example: the current working mode of the lifting system, the sensor events of the lifting system, especially the position sensor system, the working mode of the first lifting mechanism, the working mode of the second lifting mechanism, etc. Therefore, for example, a corresponding status signal about "the semi-trailer support unit is already in or is in a target position relative to the first lifting mechanism" can be provided with the help of the signal providing unit. In addition, the signal providing unit provides a status signal about "the first lifting mechanism is currently moving to the connection position and / or the separation position". In addition, the status signal can explain or describe that the first lifting mechanism is currently arranged in the connection position and / or is currently arranged in the separation position.

[0028] The status signal generated and / or provided by the signal providing unit is in particular intended for the (human) driver of the tractor. For this purpose, it can be provided that the signal providing unit provides the status signal optically and has, for this purpose, for example, a light signal device (traffic light). It can also be provided that the signal providing unit provides the status signal acoustically and for this purpose includes a sound signal device such as a loudspeaker. Alternatively or additionally, it is conceivable that the signal providing unit provides the status signal to the driver of the tractor in a tactile manner. For this purpose, it can be provided, for example, that the signal providing unit includes a vibrating element formed in / in the tractor. The vibrating element is preferably arranged in the tractor in such a way that it acts on the driver's station of the tractor, for example, a steering wheel, a driver's seat, etc.

[0029] Furthermore, the status signal can be a purely electrical and / or electronic signal, which is directly provided to the steering and drive unit of the tractor, wherein the steering and drive unit of the tractor then receives the status signal in particular as a control signal or control input signal. In this connection, it is very advantageous that the steering and drive unit of the tractor provides at least one at least partially autonomous or partially automatic driving mode, in which the tractor can drive at least partially autonomously or at least partially automatically with the aid of the steering and drive unit. In this way and in particular in cooperation with the position sensor system, the tractor can be oriented at least partially automatically and / or at least partially autonomously relative to the first lifting mechanism and / or relative to the second lifting mechanism by the steering and drive unit of the tractor in combination with the signal providing unit, i.e., the respective adjustment of the first lifting mechanism and / or the second lifting mechanism can be achieved as specified.

[0030] A lifting system equipped with a signal providing unit provides the following advantages, namely, the human driver of the tractor or tractor train always provides information about the current working mode and / or current state of the lifting system. Correspondingly, the human driver can then operate the tractor and / or tractor train in a manner suitable for the situation. If the signal providing unit provides a state signal as a control signal for the steering and drive unit of the tractor, a very efficient process is ensured when the tractor and / or tractor train is dispatched relative to the first lifting mechanism and / or the second lifting mechanism. Because the at least partially automatic or at least partially autonomous control of the tractor or tractor train, especially under the guidance of sensors, is usually more accurate, faster and / or less prone to failure than human control of the tractor or tractor train.

[0031] In general, a locking unit is provided in the lifting system, by means of which the semitrailer is prevented from rolling away, even when the semitrailer and the tractor are separated from each other. In this case, for example, it can be a concave surface / pit or depression in the surface of the base part, which corresponds to the rear wheel set of the semitrailer in such a way that the rear wheel set engages in this depression or concave surface, especially when the support unit of the semitrailer is arranged in the target position relative to the first lifting mechanism. In this way, the tractor is prevented from rolling away, so that the support unit of the semitrailer remains arranged in the target position relative to the first lifting mechanism after the tractor stops, for example when the driver releases the foot brake.

[0032] In addition, the present invention relates to a logistics operation device for a truck convoy. The truck convoy consists of a plurality of trucks, wherein each truck can be designed as a multi-section combined train or a saddle traction train. This means that the truck convoy can have not only at least one multi-section combined train but also at least one saddle traction train, and in particular, both of them can be multiple.

[0033] In order to achieve a particularly efficient and, in particular, automated or automatable flow of goods or logistics by means of a logistics operation installation, the logistics operation installation has a lifting system designed in accordance with the above description.

[0034] The logistics operation equipment, which can also be called a center, has, for example, at least one building and is also designed to effectively take care of the driving of the truck convoy. In particular, when the trucks of the truck convoy are at least partially equipped with steering and drive units that provide a fully automated working mode (level 4 according to SAEJ3016), the logistics operation equipment or center is designed to effectively take care of level 4 driving. The correspondingly equipped trucks of the truck convoy are therefore self-propelled trucks, whose driving tasks are advantageously ended and / or started at a logistics operation equipment respectively. The coordination of self-propelled trucks, their respective loading, tractors, trailers, their maintenance and / or inspection are carried out at / in the logistics operation equipment. To this end, the respective logistics operation equipment includes the required maintenance, inspection, weighing, cleaning, refueling, routine maintenance and / or calibration infrastructure, which is required to ensure or maintain the particularly efficient operation of the self-propelled trucks. In addition, the respective logistics operation equipment includes a data processing infrastructure that supports the operation of the respective logistics operation equipment.

[0035] In other designs of logistics operation equipment, it has at least two layers or floors and a lifting system including a first lifting mechanism and a second lifting mechanism. As already described about the lifting system, the first lifting track plane is preferably the first layer therein, such as the bottom layer, and at least another lifting track plane is another layer therein, such as the first floor above. Correspondingly, it is stipulated that in the logistics operation equipment with a lifting system, the base member on which at least a part of the corresponding truck is mounted can be moved between the first layer therein and at least another layer therein. If the corresponding truck is a multi-section combination train, it can be stipulated, for example, that only the trailer can be raised and lowered between the layers by means of a lift or by means of a second lifting mechanism. It can also be stipulated that the second lifting mechanism has enough space for transporting or moving the entire truck between the layers. It is particularly preferred that the corresponding truck is a saddle traction train, wherein, then as already shown above, the lift of the logistics operation equipment is designed to transport or move the semitrailer between the layers of the logistics operation equipment.

[0036] A logistics operation system designed in this way is particularly space-efficient or area-efficient, so that the entire functional potential of the corresponding logistics operation system is advantageously concentrated in a small area.

[0037] In particular, the logistics operation system with the first lifting mechanism and the second lifting mechanism provides that on a first level of the system, the trailer of the corresponding truck and the tractor, i.e., for example, the saddle tractor and the semitrailer, are separated or can be separated from each other by means of the first lifting mechanism, and then the trailer, such as the semitrailer, can be moved to another level of the system by means of the second lifting mechanism, and then another tractor, which is different from the first tractor, is coupled to the trailer on the other level of the system. In this case, at least one of the tractors is simply assigned to the logistics operation system.

[0038] For example, the second or another tractor is only assigned to the logistics operation equipment and is not designed and / or equipped to participate in public road traffic in a permitted manner. In particular, the other tractor that is only assigned to the logistics operation equipment is an autonomous transport vehicle, especially a driving robot, for the in-plant traffic of the logistics operation equipment. The difference between this tractor that is only used in the in-plant traffic of the logistics operation equipment and the first tractor, especially a saddle tractor, is that no driver's station is provided for a human driver. In addition, the other tractor is designed to be very compact, whereby the maneuverability or dispatching ability of the other tractor is particularly varied in an advantageous manner. As a result, the semitrailer or trailer can be dispatched very efficiently and especially site-efficiently on another level with the help of another tractor, so that the site available there can be fully utilized very efficiently on another level.

[0039] Finally, the invention relates to a logistics system having a truck platoon and at least one logistics operation device according to the above description. By using the logistics operation device and the lifting system in the logistics system, the logistics system of the invention allows a particularly efficient and in particular automated or automatable flow of goods or logistics. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Further advantages, features and details of the invention are obtained from the following description of preferred embodiments and in conjunction with the figures. The features and feature combinations mentioned above in the description and the features and feature combinations mentioned below in the description of the figures and / or shown individually in the figures can be used not only in the respectively indicated combination, but also in other combinations or individually without departing from the scope of the invention, wherein:

[0041] Figure 1 A schematic diagram showing a saddle traction train when traveling on a lifting system;

[0042] Figure 2 A schematic diagram of a saddle-type traction train is shown, wherein its semitrailer is rotated to a separation position by means of a lifting system;

[0043] Figure 3 A schematic diagram of a saddle traction train is shown, wherein its saddle tractor is driven out from under a semitrailer that is rotated to a disengaged position;

[0044] Figure 4 A schematic diagram of a saddle traction train when traveling on a crane system, the crane system providing a first state signal by means of a signal providing unit;

[0045] Figure 5 A schematic diagram of a saddle traction train when traveling on a crane system, the crane system providing a second state signal by means of a signal providing unit;

[0046] Figure 6 A schematic diagram of a saddle traction train is shown, wherein the semitrailer is adjusted to a separation position by means of a lifting system, and the lifting system provides a third state signal by means of a signal providing unit;

[0047] Figure 7 A schematic diagram showing a portion of a logistics operation equipment including a lifting system having a first lifting mechanism for adjusting a semitrailer between a disconnected position and a connected position and a second lifting mechanism for adjusting the semitrailer between a first lifting rail plane and another lifting rail plane;

[0048] Figure 8 The following diagram shows how the semitrailer is adjusted between a first lifting rail plane and another lifting rail plane. Figure 7 A schematic diagram of the logistics operation equipment shown;

[0049] Fig. 9 A schematic diagram showing another lifting track plane of a logistics operation equipment when a tractor is connected to a semi-trailer;

[0050] Fig.10 Show Fig. 9 A schematic diagram of another crane track plane shown, wherein the tractor and semi-trailer are engaged with each other; and

[0051] Fig.11 Show Figure 8 or Fig. 9 A schematic diagram of another crane track plane is shown, in which a semitrailer is detached from the crane system by means of the tractor. DETAILED DESCRIPTION

[0052] In the figures, identical or functionally identical components are provided with the same reference symbols.

[0053] The following describes the lifting system 1 and the logistics operation equipment 2 (first time in Figure 7 ) and logistics system 3.

[0054] Figure 1 The schematic diagram shows the traction vehicle 4 as it passes the crane system 1 . Figure 2 The schematic diagram shows a tractor train 4 , wherein its semitrailer 5 is pivoted into a disconnected position by means of a lifting system 1 . Figure 3 The schematic diagram shows a tractor train 4, wherein its tractor 6 is driven out from under the semitrailer 5 which has been rotated into the uncoupled position. Figure 1 In the figure, it can be seen that a tractor train 4 consisting of a semitrailer 5 and a tractor 6 moves into / at a logistics operation device 2 as part of a logistics system 3, wherein the tractor train 4 moves on the surface 7 of a base part 8. In this case, the surface 7 has at least two surface sections 9, 10, so that the (entire) surface 7 of the base part 8 is formed at least by the two surface sections 9, 10.

[0055] The lifting system 1 further comprises a first lifting mechanism 11 which is integrated, here embedded, into the base part 8. In this case, the surface segment 10 is assigned to the first lifting mechanism 11, so that the surface segment 10 can be raised and lowered relative to the surface segment 9 by means of the first lifting mechanism 11. In the completely lowered position of the first lifting mechanism 11 (see Figure 1 ), the surface section 10 of the first lifting mechanism 11 is therefore also completely lowered. In this state, the surface sections 9, 10 are located in the same plane, so that there is no height difference between the surface sections 9, 10. This means that the saddle traction train 4, in particular the saddle traction vehicle 6, can continue to smoothly travel over the lifting mechanism 11, in particular its surface section 10, without having to bridge / overcome edges or height differences.

[0056] The semitrailer 5 is in particular a common or known semitrailer from the prior art and accordingly has a support unit 12, which is designed to hold or support the semitrailer 5 in an elevated manner on a base member 8, in particular a surface 7, to allow the connection and / or separation of the tractor 6. For this purpose, it is known, for example, that the support unit 12 has two removable supports, so that the logistics system 2 is supported on the surface 7 of the base member 8 when each support is moved out, so that the tractor 6 is separated from the semitrailer 5, so that the tractor 6 can be driven out from under the logistics system 2 without pulling the semitrailer 5. Before the tractor 6 drives away from the semitrailer 5, the semitrailer connector 13 between the semitrailer 5 and the tractor 6 should be disconnected.

[0057] As is well known, the semitrailer connector 13 has a connector 14 on the saddle tractor side and a connector 15 on the semitrailer side, wherein the connectors 14 and 15 correspond to each other. For example, the connector 14 on the saddle tractor side can be a saddle plate, and the connector 15 on the semitrailer side is a saddle journal or a center journal. Correspondingly, the connector 14 on the saddle plate or the saddle tractor side has, for example, a saddle journal seat, wherein the saddle journal or the connector 15 on the semitrailer side and the saddle journal seat or the connector 14 on the saddle tractor side are engaged with each other, so that the semitrailer connector is closed in this state. Therefore, if the saddle tractor 6 and the semitrailer 5 are engaged with each other by means of the semitrailer connector 13 and the semitrailer connector 13 is closed or locked and / or locked, the semitrailer 5 can be pulled, pushed and / or turned by means of the saddle tractor 6. In this regard, the tractor train 4 thus forms a truck, wherein in the present example it is provided that the truck or tractor train 4 can be fully automatically operated, in particular can move forward, according to level 4 of SAE J3016. This means that the tractor train 4, in particular the tractor vehicle 6, has a steering and drive unit (not shown) which provides at least one fully automatic driving mode designed according to level 4 at least for the tractor vehicle 6. This means that all driving tasks described herein in connection with the lifting system 1, the logistics operation equipment 2 and / or the logistics system 3 can be completed or executed in the fully automatic driving mode. Alternatively or additionally, it can be provided that the (human) driver completes or performs driving tasks in a conventional manner with the aid of the common operating parts of the tractor vehicle 6.

[0058] In order to separate or disconnect the tractor train 4 so that the tractor 6 and the semitrailer 5 are free of one another, a lifting system 1 is now preferably used in which provision is made for the support unit 12 , such as its removable support, to remain immobilized.

[0059] To this end, the traction train 4 is first driven further over the surface 7 to a sufficient extent that the current position or actual position of the support unit 12 relative to the first lifting mechanism 11 corresponds to the following: Figure 2 The predetermined or predeterminable target position shown. Figure 1 Starting from the state shown, the tractor 6 further pulls the semitrailer 5 past the first lifting mechanism 11 until the target position and the actual position of the support unit 12 coincide. Then, for example, the surface segment 10 assigned to the first lifting mechanism 11 is lifted or moved out by means of the actuator of the first lifting mechanism 11. In other words, the surface segment 10 assigned to the first lifting mechanism 11 is lifted or moved out from the (imaginary) plane of the surface 7, so that the surface segment 10 and the support unit 12 are in direct mechanical contact. Then, the surface segment 10 is further lifted, so that the tractor 6 finally gets rid of the semitrailer 5. When the surface segment 10 is further lifted and / or when the tractor 6 continues to travel alone, the connecting parts 14 and 15 are separated from each other, so that the mechanical connection between the tractor 6 and the semitrailer 5 is finally separated in a prescribed manner. This ultimately leads to the following Figure 3 The state shown, in which the tractor 6 is moving alone, in particular away from the semitrailer 5. In the logistics operation device 2 or the logistics system 3, for example, it is provided that the tractor 6 then drives to a service device of the logistics operation device 2 or the logistics system 3, for example to refuel and / or (re)charge.

[0060] Figure 1 , 2 3 also shows a brake 16, which is designed as a recess here and corresponds to the rear wheel set 17 of the semitrailer 5. When the first lifting mechanism 11 is driven by the saddle traction vehicle 4, the wheel set 17 engages in the brake 16 or the recess, thereby preventing the semitrailer 5 from rolling undesirably at least when the support unit 12 is aligned with the target position.

[0061] The lifting system 1, in particular the first lifting mechanism 11, is therefore designed to be in the connected position (see Figure 1 ) and separation position (see Figure 2 , Figure 3 ), in particular the semitrailer 5 is adjusted, in particular rotated, between the two ends of the semitrailer 5. In this case, the connection position is characterized in that the semitrailer-side connection part 15, i.e. the saddle journal, is arranged at the connection height. The disconnection position is characterized in that the semitrailer-side connection part 15 or the saddle journal is arranged at the disconnection height, wherein the disconnection height and the connection height should be measured between the saddle journal or the semitrailer-side connection part 15 and the surface section 9, respectively.

[0062] It is provided that the semitrailer 5 is arranged in the connection position only when the connecting piece 15 on the saddle axle journal or semitrailer side is inserted into the corresponding connecting piece seat or saddle axle journal seat of the saddle tractor 6. In order to separate the saddle tractor 6 from the semitrailer 5 and / or when the saddle tractor 6 is separated from the semitrailer 5, it is provided that the semitrailer 5 is adjusted from the connection position to the separation position by means of the first lifting mechanism 11. Therefore, it is provided that when the semitrailer 5 and the saddle tractor 6 are separated from each other, that is, they form independent vehicles, the semitrailer 5 is arranged in the separation position.

[0063] The lifting system 1 also has a position sensor system 18, which in this example comprises a first position sensor 19 and a second position sensor 20 (see Figure 4 ). Here, the first position sensor 19 is formed or arranged on the tractor 6, in particular at the rear of the tractor 6. This means that the position sensor system 18 is at least partially formed on the tractor 6. The second position sensor 20 is formed in / on the first lifting mechanism 11 (see Figure 4 ). Accordingly, it is provided that the position sensor system 18 is at least partially arranged on the first lifting mechanism 11 , for example integrated therein.

[0064] By means of the position sensor system 18, i.e. by means of the first position sensor 19 and / or the second position sensor 20, the current position of the support unit 12 relative to the first lifting mechanism 11, i.e. the actual position of the support unit 12 is measured. Then, the movement of the first lifting mechanism 11 is permitted and / or prevented by the lifting system 1 based on the actual position of the support unit 12 relative to the first lifting mechanism 11. For this purpose, the position sensors 19, 20, i.e. the position sensor system 18, are in data communication with a control unit 21 for transmitting sensor data, wherein the control unit 21 can be a control unit of the lifting system 1, the logistics operation device 2 and / or the logistics system 3. In this case, the control unit 21 is at least partially formed in / on the tractor 6. For example, the relative position between the tractor 6 and the support unit 12 can be detected by means of the first position sensor 19 when driving past the first lifting mechanism 11, by detecting by means of the first position sensor 19 how far the tractor 6 has traveled past the first lifting mechanism 11. Since the distance between the first position sensor 19 and the support unit 12 is also provided to the control unit 21, the distance covered by the saddle traction vehicle 4 is calculated until the target position of the support unit coincides with the actual position. The support unit 12 can therefore be moved to the target position particularly efficiently by means of the position sensor system 18, in particular by means of the first position sensor 19. A possible mode of operation of the second position sensor 20 will also be described in detail below.

[0065] Figure 4 The schematic diagram shows a traction vehicle 4 while traveling past a crane system 1 , which is equipped with a signal supply unit 22 , by means of which a first state signal 23 can be provided. Figure 5 The schematic diagram shows the traction vehicle 4 while traveling past the crane system 1 , wherein a second state signal 24 is provided by means of the signal providing unit 22 . Figure 6 The schematic diagram also shows a tractor train 4 , in which the semitrailer 5 is brought into a disconnected position by means of the lifting system 1 and in which a third state signal 25 is provided by means of the signal providing unit 22 . Figure 4The position of the saddle traction train 4 relative to the first lifting mechanism 11 corresponds to Figure 1 The position of the saddle traction train 4 relative to the first lifting mechanism 11 is shown. Figure 4 , the second position sensor 20 of the position sensor system 18 is shown, wherein it can be seen that the second position sensor 20 is integrated into the first lifting mechanism 11. Figure 4 2 shows a signal providing unit 22, by which a first state signal 23 is output or can be output. The signal providing unit 22, which is designed as a light signal device or a traffic light, is Figure 4 , a first state signal 23 is shown, which is activated, for example, by means of the control unit 21, when the actual position and the target position of the support unit 12 are separated from each other and the saddle traction vehicle 4 must be moved further past the first lifting mechanism 11 until the target position and the actual position of the support unit 12 coincide. In addition, the first state signal 23 can be provided or output by means of the light signal device or the signal providing unit 22, when the support unit 12 is not (yet) detected by means of the second position sensor 20 or when the target position and the actual position of the support unit 12 are detected to be separated from each other by means of the second position sensor 20.

[0066] In order to control the signal providing unit 22 in such a way that it indicates a status signal that is different from the first status signal 23, the signal providing unit 22 and the position sensor system 18, in particular the second position sensor 20, are or can be connected to one another in terms of data technology, at least indirectly. Thus, for example, it can be provided that the second position sensor 20 and the signal providing unit 22 are connected to one another in terms of data technology via the control unit 21. Accordingly, the signal providing unit 22 or the light signal device indicates the first status signal 23 based on which sensor result the second position sensor 20 provides to the control unit 21.

[0067] like Figure 5 The position of the saddle traction train 4 relative to the first lifting mechanism 11 corresponds to the following Figure 2 The position of the saddle traction train 4 relative to the first lifting mechanism 11 is shown in FIG. Figure 5 The first lifting mechanism 11 has not yet been placed in the separation position. Figure 5In the state of the lifting system 1 shown, the signal providing unit 22 indicates a second state signal 24, which characterizes that the target position and the actual position of the support unit 12 coincide. In addition, the second state signal 24 can be a parking signal, which is particularly directed to the driver of the saddle tractor 6, thereby sending a signal to the driver that the saddle tractor 6 should be braked and / or kept braked. In other words, the second state signal 24 can send a signal to the driver of the saddle tractor 6 indicating that the saddle tractor 6 is locked with the foot brake and / or with the hand brake to prevent rolling or starting. Alternatively or additionally, the second state signal 24 can send a signal to the driver of the saddle tractor 6 indicating that the target position and the actual position of the support unit 12 are only slightly spaced from each other, so that the driver only has to travel a short distance with the saddle traction train in order to make the target position and the actual position of the support unit 12 coincide. In other words, the second state signal 24 indicates that the driver of the saddle traction train 4 is required to complete fine-tuning so that the target position of the support unit 12 coincides with the actual position.

[0068] If the semitrailer 5 is then separated from the tractor 6 by means of the lifting system 1, in particular by means of the first lifting mechanism 11, i.e. the semitrailer 5 is placed in a separation position by means of the first lifting mechanism 11 and all other measures are taken to make the tractor 6 and the semitrailer 5 independent of each other, the signal providing unit 22 provides a third state signal 25 (see Figure 6 ). Figure 6 and Figure 3 It becomes clear that the connection between the semitrailer 5 and the first lifting mechanism 11 is Figure 6 The relative position shown corresponds to the following between the semitrailer 5 and the first lifting mechanism 11: Figure 3 The third state signal 25 indicates that safe or correct movement has been achieved with the aid of the tractor 6 without the trailer 5 being pulled or otherwise moved in an undesirable manner.

[0069] The signal providing unit 22 can be manufactured particularly simply and / or cost-effectively and operated particularly efficiently or cost-effectively when it is designed as a traffic light (as shown here). Accordingly, in the present example, the first state signal 23 is a red or upper light signal, the second state signal 24 is a yellow or middle light signal, and the third state signal 25 is a green or lower light signal.

[0070] In other embodiments, the lifting system has a further lifting mechanism 26, by means of which the base element 8 together with the first lifting mechanism 11 can be raised and lowered between a first lifting rail plane 27 and at least another lifting rail plane 28. Accordingly, the second lifting mechanism 26 is a lift or at least a device similar to a lift. Since the lifting rail planes 27, 28 are located in particular at different levels 29, 30, this is particularly advantageous in that the lifting system is not limited to the lifting of the base element 8 or the lifting of the first lifting mechanism 11. Figure 7-11becomes clear in the overview.

[0071] Figure 7 The schematic diagram shows a part of a logistics operation installation 2 , which comprises a lifting system 1 , namely a first lifting mechanism 11 and a second lifting mechanism 26 , and two lifting track planes 27 , 28 or two levels 29 , 30 . Figure 7 It is shown that the tractor train 4 is maneuvered relative to the first lifting mechanism 11, in particular by means of the tractor 6, on the first lifting rail plane 27 or on the first level 29, in such a way that the target position and the actual position of the support unit 12 coincide. If this is the case, the semitrailer 5 is adjusted to the separation position, as described above. This means that the tractor 6 then drives away from the semitrailer 5 in a prescribed manner, so that the semitrailer 5 is initially arranged alone in / at the lifting system 1 on the first lifting rail plane 27 or on the first level 29. The lifting system 1 in this case has a transport box 31, whose bottom part 32 forms the base part 8 of the lifting system 1, so that the first lifting mechanism 11 is integrated into the bottom part 32 of the transport box 31.

[0072] If the tractor 6 drives away after being uncoupled from the semitrailer 5, the transport box 31 can be raised and lowered by means of the second lifting mechanism 26, which Figure 8 is shown in . Figure 8 The schematic diagram shows the logistics operation system 2 when the semitrailer 5 is moved between the first lifting rail level 27 and the further lifting rail level 28. It can be seen that when the transport box 31 is raised, the transport box together with the semitrailer 5 is lifted relative to the first lifting rail level 27 or relative to the first level 29.

[0073] Fig. 9 A further lifting rail plane 28 or a further layer 30 is shown schematically, wherein the surface section 9 of the base element 8 and the further lifting rail plane 28 coincide. Figure 7 It can be clearly determined that in the state shown there, ie when the height level of the transport box 31 corresponds to the height level of the first lifting rail plane 27 or the first layer 29, the first lifting rail plane 27 and the surface section 9 coincide. Figure 8 In the case of semi-trailer 5 Figure 7 The height level shown is raised, so that the final result is as follows Fig. 9 Status shown.

[0074] exist Fig. 9 , Fig.10 and Fig.113 shows a tractor 33 designed to be different from the saddle tractor 6, which is designed to be responsible for maneuvering the semitrailer 5 at least on the second lifting rail plane 28 or on the second layer 30. Here, the tractor 33 is part of the in-plant traffic system of the logistics operation equipment 2 or the logistics system 3 and is not designed to participate in public road traffic in particular. In other words, the tractor 33 is only assigned to the logistics operation equipment 2. For example, the tractor 33 is designed as a driving robot, which takes over the movement or maneuvering of the semitrailer 5 on the factory site of the logistics operation equipment 2 in a fully autonomous manner. Compared with the common saddle tractor and especially compared with the saddle tractor 6, the tractor 33 has smaller outer dimensions and / or a shorter wheelbase, so that the tractor 33 can travel and / or maneuver particularly efficiently, especially space-efficiently or site-efficiently.

[0075] In addition, the tractor 33 has a tractor-side connection 14 similar to the tractor 6, which corresponds to the connection 15 on the trailer side, so that a trailer coupling 13 is formed or can be formed or closed between the tractor 33 and the trailer 5. Fig.10 , which shows a schematic diagram of another lifting rail plane 28 or another layer 30 for coupling a tractor 33 and a semitrailer 5 to each other by means of a semitrailer coupling 13. In order to couple the semitrailer 5 to the tractor 33, the tractor 33 is moved with its saddle plate below the semitrailer 5 in the disconnected position until the positions of the saddle journal seat and the saddle journal correspond to each other, so that when the first lifting mechanism 11 is lowered, the coupling element 15 on the semitrailer side is adjusted from the disconnected height to the connected height, in that the semitrailer 5 is adjusted from the disconnected position to the connected position by means of the first lifting mechanism 11. In this case, the "adjustment of the semitrailer 5 by means of the first lifting mechanism 11" does not differ from the "adjustment performed with respect to the saddle tractor 6 to separate the saddle tractor 6 from the semitrailer 5 and / or to connect the saddle tractor 6 and the semitrailer 5 to each other".

[0076] Thus, if the trailer 5 is placed on the saddle plate of the tractor 33 and the trailer coupling 13 is closed in the prescribed manner, the trailer 5 can be moved, pushed and / or maneuvered by means of the tractor 33. The trailer 5 is placed on the saddle plate of the tractor 33 in such a way that the first lifting mechanism 11 and thus the surface segment 10 assigned to the first lifting mechanism 11 are lowered toward the base part 8 or the bottom part 32 so that the surface segments 9, 10 are (again) located in the same plane. This ultimately Figure 1 , which schematically shows a further lifting rail level 28 or a further level 30 , in which the semitrailer 5 is detached from the lifting system 1 by means of a tractor 33 .

[0077] In general, the present invention shows how to achieve or support a particularly efficient and in particular automated or automatable cargo flow or logistics with the help of a lifting system 1, with the help of a logistics operation device 2 and / or with the help of a logistics system 3. Because the undesirable parking times of both the saddle tractor 6 and the semitrailer 5 are reduced to a minimum in an advantageous manner. Therefore, the present invention makes a decisive contribution to the automation of logistics operation equipment, thereby further increasing the cargo flow speed or logistics speed. It is particularly advantageous in the present invention that conventional semitrailers do not need to be modified in order to cooperate with the lifting system 1, the logistics operation device 2 and / or the logistics system 3. This takes into account economic and / or ecological sustainability.

Claims

1. A lifting system (1) for a semitrailer (5) of a saddle-type traction train (4), comprising a first lifting mechanism (11), by means of which the semitrailer (5) can be moved between a connected position and a disconnected position with respect to a surface (7) of a base part (8) on which the semitrailer (5) is mounted, wherein: In the connected position, the connecting member (15) of the semitrailer (5) is arranged at a connection height higher than the surface (7) of the base member (8); and in the disconnected position, the connecting member (15) is arranged at a disconnected height higher than the surface (7) of the base member (8). Its characteristics are: The surface section (10) of the base element (8) is assigned to the first lifting mechanism (11) and is thereby designed to be adjustable in height, so that by adjusting the surface section (10), the semitrailer (5) can be moved between the connection position and the disconnection position. During the movement from the connection position to the disconnection position, the surface segment (10) assigned to the first lifting mechanism (11) is lifted from the imaginary plane of the surface (7), so that the surface segment (10) and the support unit (12) of the semitrailer (5) are in direct mechanical contact, and then the surface segment (10) is further lifted, so that the saddle tractor (6) finally breaks away from the semitrailer (5) without the wheels of the semitrailer being in contact with the surface segment (10). The lifting system also includes a brake part (16) designed as a recess, which corresponds to the rear wheel set (17) of the semitrailer. When the saddle traction train (4) passes the first lifting mechanism (11), the rear wheel set engages in the brake part, thereby preventing undesirable rolling of the semitrailer (5) at least when the support unit (12) is aligned with the target position.

2. The lifting system (1) according to claim 1, characterized in that: A position sensor system (18) is provided, by means of which the current position of the support unit (12) of the semitrailer (5) relative to the first lifting mechanism (11) can be detected, wherein the lifting system (1) can allow and / or prevent the movement of the first lifting mechanism (11) based on the current position of the support unit (12) relative to the first lifting mechanism (11).

3. The lifting system (1) according to claim 2, characterized in that: The position sensor system (18) is at least partially arranged or can be arranged on the tractor vehicle (6) of the tractor train (4).

4. The lifting system (1) according to claim 2, characterized in that: The position sensor system (18) is at least partially arranged or can be arranged on the first lifting mechanism (11).

5. The lifting system (1) according to claim 3, characterized in that: The position sensor system (18) is at least partially arranged or can be arranged on the first lifting mechanism (11).

6. Lifting system (1) according to any one of the preceding claims 1 to 5, characterized in that A further lifting mechanism (26) is provided, by means of which the base element (8) can be raised and lowered between a first lifting rail plane (27) and at least one further lifting rail plane (28).

7. Lifting system (1) according to any one of the preceding claims 1 to 5, characterized in that A signal providing unit (22) is provided, by which a state signal (23, 24, 25) representing the current state of the lifting system (1) can be provided to the tractor vehicle (6) of the tractor train (4).

8. A logistics operation device (2) for a truck platoon, characterized in that: A lifting system (1) is provided which is designed according to one of the preceding claims.

9. Logistics operation equipment according to claim 8, having at least two levels (29; 30) and a lifting system (1) according to claim 6, characterized in that The base member (8) is movable between a first layer (29; 30) thereof and at least one other layer (29; 30) thereof by means of a further lifting mechanism (26).

10. The logistics operation equipment (2) according to claim 9, characterized in that: On a first level (29; 30), the trailer (5) and the tractor (6) of the truck train can be separated from each other by means of the first lifting mechanism (11), the trailer (5) can be moved to another level (29; 30) by means of the other lifting mechanism (26), and another tractor (33) and the trailer (5) can be connected to each other on the other level (29; 30), wherein at least one of the tractors (6; 33) is simply assigned to the logistics operation equipment (2).

11. A logistics system (3) having a truck platoon and a logistics operation device (2) designed according to one of claims 8 to 10.

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