Pallet transport vehicle

Abstract

Subject of the invention is a pallet transport means for transporting a plurality of pallets (1), having a chassis (2) configured for receiving the plurality of pallets (1) and at least two lifting devices (3) arranged oppositely on the chassis (2), wherein each lifting device (3) has a plurality of carriages (8) spaced apart and interconnected, which are each configured for receiving a respective pallet (1) opposite to each other in pairs and which are displaceable relative to the chassis (2) both orthogonally and parallel.

Description

Technical Field

[0001] The present invention relates to a pallet transport vehicle for transporting multiple pallets, the pallet transport vehicle having a base frame configured to receive the multiple pallets. Background Technology

[0002] Pallet transport vehicles, as known in the prior art, are used for placing and transporting individual pallets or multiple pallets stacked on top of each other. Such pallet transport vehicles can be moved between locations either manually using a tow bar or by motorized means. Pallets are typically flat structures and can be made of wood, metal, or plastic. Goods or individual items can be placed on pallets and transported using them.

[0003] In the air freight sector, so-called Unit Load Devices (ULDs) are used as pallets to load baggage, cargo, and / or shipments into air vehicles. To optimize weight, such pallets are typically made of aluminum sheet with a lower frame made of profiles, where cargo nets can usually be suspended from the edges of the lower frame to secure baggage, cargo, and / or shipments placed on the pallet.

[0004] Empty pallets are moved between different locations, such as between air cargo terminals and aircraft parked at airports, either individually or stacked on top of each other on pallet transport vehicles. However, neither of these variations is optimal in this case. Of course, transporting a pallet one at a time using a so-called transport trolley is time-consuming and labor-intensive. Stacking pallets can usually only be accomplished using electrically driven equipment such as forklifts, in which case manual, and therefore time-consuming, methods are necessary to prevent the stack from slipping. Furthermore, individual pallets are frequently damaged during loading and unloading, which can lead to potential personal injury. Summary of the Invention

[0005] In light of this, the object of the present invention is to provide an improved pallet transport tool and a corresponding method, so as to enable the transport of multiple pallets in a simple and reliable manner.

[0006] The object of the present invention is achieved by the features of a pallet transport vehicle and a method for transporting multiple pallets using the pallet transport vehicle. Advantageous design solutions are provided in the specific embodiments.

[0007] Accordingly, this objective is achieved by a pallet transport vehicle for transporting multiple pallets, the pallet transport vehicle having:

[0008] A base frame configured to receive the plurality of pallets; and

[0009] At least two lifting devices are arranged opposite each other on the base frame, wherein

[0010] Each lifting device has a number of spaced-apart, interconnected brackets, each of which is configured to receive a corresponding tray in pairs relative to each other, and these brackets are capable of being orthogonally displaced and parallel to the base frame on the one hand and on the other hand.

[0011] A key aspect of this invention is that the proposed pallet transport tool enables the reliable transport of multiple pallets and allows for the simple and independent loading and unloading of these pallets onto or from the pallet transport tool. This is because the movable brackets, equipped with lifting devices, allow the pallets to be placed independently and spaced apart on the pallet transport tool. In other words, this spaced-apart placement ensures that the pallets are not damaged during transport, loading, and unloading, a common practice with pallet transport tools known in the prior art.

[0012] In the exemplary loading of a pallet transport vehicle, a first pallet can first be placed on the underframe, specifically pushed onto it. The first pallet can be lifted by orthogonally displacing the first brackets, arranged in pairs opposite each other, away from the underframe, allowing a second pallet to be placed on the underframe. A third pallet can be placed on the underframe by continuing to orthogonally displacing the opposing brackets away from the underframe while simultaneously lifting the first bracket pair with the first pallet and the second bracket pair spaced apart from the first bracket pair, on which the second pallet rests. Unloading can be performed in a similar manner, thus pallets can be removed from the pallet transport vehicle sequentially by lowering the brackets. In the retracted state, the brackets are preferably arranged in the underframe, for example, having a base plate, and can be retracted or extended. Loading and unloading can be performed using a device for accurately oriented transport pallets, as described in German patent application publication number 10 2019 126 427. Due to the built-in brackets, a height difference is created in the base plate. A ramp can be supported on the base plate to position the pallet. These ramps can fold upwards at corners, or they can be integrated into the bottom plate and pulled out during loading and unloading. The ramps are preferably designed to ensure a high degree of freedom of movement in the horizontal plane after folding downwards and / or pulling out, for example, through ball joints. Damping and / or flexible elements can be provided in the areas where the ramps are suspended to prevent damage to the ramps during collisions between pallets and pallet transport vehicles.

[0013] Pallet transport vehicles can be designed as trailers, especially with a drawbar for manual movement and / or attachment to a towing vehicle. Similarly, pallet transport vehicles can also be motorized, for example, with a combustion engine and / or an electric motor with a corresponding battery. Of course, multiple wheels or rollers can be provided on the underside of the chassis, by means of which the pallet transport vehicle can be moved like on a ball bearing platform. Preferably, the pallet transport vehicle is designed for transporting 3, 4, 5, 6, 7, 8, 9, 10 or more pallets. The chassis preferably has a rectangular, especially square, shape. Lifting devices are preferably located on the longitudinal sides of the chassis. Preferably, multiple lifting devices are arranged on each longitudinal side, and / or these lifting devices are designed like end posts, for example, made of metal profiles and / or have end posts with brackets that can be moved relative to them. The lifting devices preferably extend orthogonally away from the top side of the chassis. During transport, securing elements can be used to fix the pallets to the chassis. This fixing is preferably done before transport begins. When actuated, for example, by a rotating mechanism, the fixing element can be positioned between spaced-out trays, for example in the form of a U-shaped profile or a flat plate. The fixing element can be mounted on a vertically rotatable rod, and / or preferably designed according to the specifications in the IATA Airport Handling Manual (AHM). Manual actuation can be performed using a fixedly mounted handle. Similarly, a hinged plate can be positioned under the respective spaced-out trays to be fixed using a folding mechanism.

[0014] In principle, the brackets can be designed arbitrarily to accommodate the corresponding pallets as needed. For example, the brackets can have corner brackets capable of receiving pallets. It is also conceivable that the brackets are formed from rotated U-shaped profiles into which pallets can be pushed. The brackets can be arranged at intervals of, for example, 100, 200, 300, or 500 mm. "Against each other in pairs" specifically means that one bracket receives a pallet on one side and another bracket receives a pallet on the opposite side. In the case of U-shaped profiles, when pallets are introduced onto the underframe according to the loading sequence, the U-shaped profiles are preferably oriented such that the pallet is located within the U-shaped profile, thereby facilitating the lifting process.

[0015] The brackets are preferably displaceable relative to the lifting device. In the extended position, for example when all brackets have received the pallet, the brackets can only extend in an orthogonal direction, while in the retracted position, all brackets can only extend parallel to the base frame. In this regard, "displaceable orthogonally on one hand and parallel on the other hand relative to the base frame" specifically means that the brackets can (e.g., between the extended and retracted positions) displace around an orthogonally curved displacement path. "Relative to the base frame" specifically means relative to the base surface and / or surface of the base frame. The base frame is preferably designed to be flat on its top side.

[0016] According to a preferred embodiment, each lifting device has a chain trolley or belt, on which a bracket is mounted. The chain trolley or belt is capable of moving orthogonally to the base frame and parallel to it on the other hand. The chain trolley can be designed as a chain, and the bracket is secured to it by means of angle brackets. Preferably, the chain trolley is movable relative to the end post or lifting device and to a base plane parallel to the base frame.

[0017] According to another preferred design, the bracket can be displaced parallel to the base frame or in a top frame arranged orthogonally to and spaced apart from the base frame. This allows the bracket (especially in the retracted position or at least partially retracted position) to be held in the base frame or top frame, such that, for example, only the bracket occupied by the pallet extends from the base frame or top frame.

[0018] According to another preferred embodiment, the pallet transport vehicle has an electric and / or hydraulic drive unit housed within the base frame or in a top frame arranged orthogonally to and spaced apart from the base frame. This drive unit is configured to synchronously displace interconnected brackets of opposing lifting devices relative to the base frame. The drive unit can be connected to a chain pulley or belt via ropes, where the chain pulley or belt can also be directly attached to the drive unit (e.g., a hydraulic actuator). The chain pulley or belt can be connected to the drive unit via guide wheels. If the drive unit is housed within the base frame, two guide wheels can be provided at the upper and lower ends of the lifting devices or end posts. If the drive unit is housed within the top frame, rollers can be provided at the upper end of the lifting devices or end posts. If the drive unit can be displaced parallel to the base plane, one lifting device can be connected to the drive unit via another guide wheel. Alternatively, the drive unit can be designed as a manually operated device. However, the drive unit preferably includes a battery, allowing the bracket or tray to be moved without location restrictions, for example, on the tarmac. The electric drive unit can charge the battery via a photovoltaic (PV) system, which is preferably located above the underframe.

[0019] According to a preferred design, the base frame is rectangular and has four lifting devices, with at least two lifting devices spaced apart on each side of the base frame. Similarly, three, four, or more lifting devices can be provided on opposite sides. Preferably, one of the two lifting devices is assigned to a corner of the base frame. Preferably, the lifting devices are arranged on the base frame and / or sized such that the pallet can be raised or lowered.

[0020] According to another preferred design, the lifting device is pivotally mounted on the base frame. Preferably, the lifting device is connected to the base frame via a joint located at the lower edge and can therefore pivot away from the base surface.

[0021] In yet another preferred improvement, the bracket is configured to engage the corresponding pallet from below for displacement. Preferably, the bracket (at its position on the lifting device) is designed in an L-shape, with a horizontal lower portion for engaging the pallet from below and an orthogonal upper portion connected to a chain trolley or belt. Here, the lower portion can be designed to be pivotable, allowing it to be pivoted to the upper portion in a space-saving manner. Furthermore, other designs for the bracket are conceivable, such as a U-shaped profile opening toward the pallet. Preferably, the bracket assigned to the pallet is moved synchronously (i.e., simultaneously) by means of a drive mechanism, such that the pallet remains on the same plane during displacement.

[0022] According to a preferred design, the base frame has multiple rollers mounted on it, allowing the corresponding pallet to roll on the base frame. These rollers are preferably designed as omnidirectional balls. Particularly preferably, these rollers are arranged at regular intervals on the base frame or base surface in the pushing direction. Preferably, multiple rows of such rollers are arranged spaced apart from each other. Similarly, such roller rows can be provided only at the edge adjacent to the lifting device. The rollers can be electrically driven in a specific direction of travel for the pallet.

[0023] The base frame can be designed to be open on the reverse side. Preferably, the base frame is defined laterally by wall elements that open at the front via openings for loading and unloading pallets onto pallet transport vehicles. The wall elements, and possibly the cover elements, can be made of plexiglass, plastic, or metal. The base frame is preferably made of metal. Furthermore, the base frame can be designed to transport different types of pallets having the same longitudinal lateral dimensions but different end-side dimensions. Uniform transport is preferred. In cases of different end-side dimensions, locking devices can be used to secure the shorter width.

[0024] The object of the invention is also achieved by a component comprising the pallet transport vehicle as described above and a plurality of pallets, wherein each pallet is received by two brackets and arranged orthogonally to and spaced apart from each other relative to the base frame. Preferably, the pallets are received by at least two brackets on opposite sides, particularly by two spaced-apart brackets on each side. As described above, the base frame can accommodate pallets of the same length but different widths to complete the loading and unloading process. During lifting and transport, the pallets are conveniently secured using stop devices.

[0025] According to a preferred improvement, the pallet is accordingly designed as a containerized equipment pallet or an air cargo pallet. Pallets or air freight pallets are commonly referred to as containerized equipment (ULDs) for loading baggage, cargo, and / or shipments (especially postal shipments) into aircraft, wide-body aircraft, and narrow-body aircraft. ULDs, or general air freight pallets, enable the bundling of large quantities of transport goods into large units, thus allowing for easy and rapid loading and unloading from aircraft, saving time and effort. Pallets and / or ULDs are preferably designed as panels made of aluminum sheet, particularly with a lower frame made of profiles, the edges of which can be designed so that the mesh of the load-bearing net can be inserted into the lower frame. Pallets and / or ULDs can also be made of plastic or composite materials. ULD pallet dimensions are typically in inches, and are, for example, 88 × 125 inches, 96 × 125 inches, or 96 × 238 inches.

[0026] According to another preferred improvement, the pallet is adapted to the base frame in its extended dimensions. Preferably, the base surface of the base frame is adapted to the pallet, particularly implemented to be equal to or substantially equal to it. In this regard, the bracket or lifting device is preferably sized and / or arranged on the base frame in such a way that the pallet placed on the base frame can be lifted or lowered by means of the bracket. In principle, the proposed solution assumes that the pallet is empty, i.e., no luggage, goods, and / or shipments are placed on the pallet. However, it is conceivable that pallet transport vehicles can be used to transport loaded pallets under corresponding dimensional settings, especially at the height of the pallet transport vehicle. Thus, for example, cargo securing devices such as straps or films can be used to secure the pallet within the pallet transport vehicle and for transport.

[0027] The present invention also aims to provide a method for transporting multiple pallets using a pallet transport vehicle, the pallet transport vehicle comprising: a base frame configured to receive the multiple pallets; and at least two lifting devices arranged opposite each other on the base frame, wherein each lifting device has a plurality of spaced-apart, interconnected brackets, each bracket being configured to receive corresponding pallets opposite each other in a paired manner, and the method comprising the following steps:

[0028] To move the pallet orthogonally within the pallet transport vehicle; to move the pallet carrier orthogonally on one side and parallel on the other side relative to the base frame.

[0029] The proposed method allows for the sequential loading and unloading of multiple pallets onto a pallet transport vehicle. The pallets can be stacked vertically within the vehicle using brackets, ensuring that they do not contact each other. This prevents pallet damage during transport, loading, and unloading.

[0030] According to a preferred improvement, the method comprises the following steps:

[0031] Push the tray onto the base frame;

[0032] The pallet that has been pushed in is moved upward relative to the base frame, away from the base frame;

[0033] Push another tray onto the base frame; and

[0034] This will cause the additional pallet and the already moved pallet to be moved together.

[0035] This allows the multiple pallets to be placed or pushed sequentially onto the base frame, each pallet being lifted in turn by at least two brackets until all pallets are placed in the pallet transport vehicle. The pallet transport vehicle can be unloaded in a similar manner.

[0036] Those skilled in the art will be able to derive other design options and advantages of this method in a manner similar to that of the pallet transport tool described above. Attached Figure Description

[0037] The invention will now be described in detail with reference to the accompanying drawings and preferred embodiments.

[0038] In the attached diagram:

[0039] Figure 1 A perspective view illustrates a pallet transport vehicle for transporting multiple pallets according to a preferred embodiment of the present invention;

[0040] Figure 2 A side view illustrating another preferred embodiment of the invention, according to... Figure 1 Pallet transport vehicles; and

[0041] Figure 3 A perspective view is shown of yet another preferred embodiment of the invention, according to... Figure 1 Pallet transport vehicles. Detailed Implementation

[0042] Figure 1A perspective view illustrates a pallet transport vehicle for transporting multiple pallets 1 according to a preferred embodiment of the invention. The pallet transport vehicle has a rectangular base frame 2 for receiving the multiple pallets 1. The base frame 2 has a flat surface made of aluminum sheet, which has a lower structure made of aluminum profile. Rollers (not shown) are provided on the underside of the base frame 2, allowing the pallet transport vehicle to be moved by means of a tow bar (also not shown). Alternatively, the base frame may have a flat underside, allowing the base frame to be moved by rollers or balls integrated into the ground (e.g., in the form of a so-called "caster deck").

[0043] Two lifting devices 3 are provided on each of the two longitudinal sides of the base frame 2. These lifting devices are arranged at intervals from each other, so that each lifting device 3 is assigned to a corresponding corner of the base frame 2. The lifting devices 3 extend orthogonally upward away from the surface of the base frame 2, thus forming a structure similar to an end post made of rectangular profiles. The lifting devices 3 form the support surface 4 of the base frame 2.

[0044] Several rows of parallel, spaced-apart omnidirectional balls 5 extend from the support surface 4. Figure 1 The image shows the respective adjacent lifting devices 3, along the pushing direction 6 of the tray 1 towards the support surface 4 (in). Figure 1 Two rows of spaced-apart gyroscopes 5 extend from the front left to the rear right in the plan view. Additionally, they can be set... Figure 1 Other rows of omnidirectional balls 5, not shown, are arranged at intervals and extend parallel to the rows shown.

[0045] With the aid of the omnidirectional balls 5, the corresponding trays 1 can be pushed onto the support surface 4 until the corresponding trays 1 are located on opposite sides enclosed by the lifting devices 3 on the support surface 4. Ramps 7 are arranged in opposite directions on the front transverse side of the base frame 2, and these ramps are located on the extensions of the spaced-apart rows of omnidirectional balls 5 to facilitate pushing the corresponding trays 1 onto the support surface 4.

[0046] Each lifting device 3 has multiple brackets 8, which can receive the pallet at the opposite edge of the corresponding pallet 1. The brackets 8 of each lifting device 3, arranged in a corner-code configuration, are fixedly mounted on a chain 9 with a breaking load of 60kN at 200mm intervals. Figure 1 As shown, these brackets each extend upward from the support surface 4, orthogonally from the support surface on the end column of the corresponding lifting device 3, away from the support surface 4.

[0047] At the bottom of the end column of the corresponding lifting device 3, a lower guide wheel 10 (only partially shown) is provided. This lower guide wheel turns the chain 9 toward the base frame 2, so that the chain 9 extends parallel to the support surface 4 and orthogonal to the pushing direction 6. By means of the corresponding chain 9, the bracket 8 fastened to the chain can be moved orthogonally to the base frame 2 and parallel to it on the other hand. Inside the base frame, the chain 9 can be connected to a spring. Alternatively, a belt can be provided instead of the chain 9, on which the brackets 8 are arranged at intervals.

[0048] The bracket 8 is designed as a foldable support bracket and has a retainer (which is fastened to and extends parallel to the chain) and a foldable receiving member for the tray 1. The receiving member extends parallel to the retainer in the folded position and orthogonally to the retainer in the unfolded position. Therefore, in Figure 2 In the unfolded position shown, the receiving member extends parallel to the support surface 4 on the lifting device 3, so that the bracket 8 can engage the tray from below at the edge of the tray 1.

[0049] Now, if pallet 1 is placed on support surface 4, then pallet 1 can be lifted by simultaneously moving all four chains 9 away from support surface 4 upwards. Figure 2 The position is shown. Support surface 4 is left unused, allowing another tray 1 to be placed on it. By further moving the four chains 9 upwards, two trays 1 are lifted, allowing yet another tray to be placed on support surface 4. Utilizing... Figure 2 The design shown, with five brackets 8, allows for the arrangement of a total of six pallets 1 spaced vertically apart within the pallet transport vehicle, enabling their simultaneous movement. If no pallets 1 are placed in the pallet transport vehicle, the entire chain 9 and all brackets 8 can be completely retracted into the base frame 2.

[0050] To move chain 9, an electric and / or hydraulic drive unit 11 is provided, which is either located within the base frame 2 (e.g., Figure 1 (as shown), or it can be set in the top frame 12 (such as...) Figure 2 (As shown). The top frame 12 is supported on four lifting devices 3 and extends parallel to the support surface 4 in a spaced-out manner. Figure 2 The drive unit 11 shown is designed as a hydraulic actuator, which is capable of shifting by 1 meter in the pushing direction 6 to move the chain 9. For this purpose, the drive unit 11 is connected to the chain 9 by means of a rope 13, which is turned by means of an upper guide wheel 14.

[0051] In contrast to the lower guide wheel 10, the upper guide wheel 14 is located at the upper end of the end column of the corresponding lifting device 3. The other upper guide wheel 14 is used to turn the other rope 13, which is connected to (in...) Figure 2 (Not shown) The other chains 9 of the opposing lifting devices 3 are connected. In this way, the interconnected brackets 8 of the opposing lifting devices 3 can be moved synchronously and parallel to the base frame 2.

[0052] If the drive unit 11 is arranged inside the base frame 2, then the upper guide wheel 14 can turn the rope toward the base frame 2. The contoured end post of the lifting device 3 can be rigidly arranged on the base frame 2, that is, as shown, extending orthogonally to and away from the support surface 4. Similarly, the end post or lifting device 3 can be pivotally arranged on the base frame 2.

[0053] The drive unit 11 can also be manual, in which case a handwheel with a crank is provided on each side of the base frame 2. The movement of the handwheel can be transmitted to the rope drum via a worm gear thread. The aforementioned electric and / or hydraulic drive unit 11 can be supplemented by a battery.

[0054] Figure 3 An alternative design scheme is shown in a three-dimensional side view or Figure 2 The design scheme includes wall elements made of plexiglass arranged around the reverse side of the base frame 2. For loading and unloading pallet transport vehicles, a transfer opening is provided on the front side, through which the pallet 1 can reach the base frame 2. Conversely, a ramp 7 on the front side is designed to be pivotable, preventing the pallet 1, placed on the bracket 8, from falling off the pallet transport vehicle by locking the ramp 7 into the vehicle.

[0055] The described embodiments are merely examples, and these examples can be modified and / or supplemented in various ways within the scope of the claims. Each feature used to describe one embodiment can be used independently or in combination with other features in any other embodiment. Each feature used to describe an embodiment of a certain category can also be applied accordingly to embodiments of another category.

[0056] List of reference numerals

[0057] Tray 1,

[0058] Base frame 2,

[0059] Lifting device 3,

[0060] Support surface 4,

[0061] 5-way ball,

[0062] Push direction 6,

[0063] Slope 7,

[0064] Bracket 8,

[0065] Chain 9,

[0066] Lower guide wheel 10,

[0067] Drive unit 11,

[0068] Top frame 12,

[0069] Rope 13,

[0070] Upper guide wheel 14.

Claims

1. A pallet transport vehicle for transporting multiple pallets (1), the pallet transport vehicle having: A base frame (2) configured to receive the plurality of trays (1); and At least two lifting devices (3) are arranged opposite to each other on the base frame (2), wherein Each lifting device (3) has multiple interconnected brackets (8). In the extended state, the brackets (8) are spaced apart from each other in a direction orthogonal to the base plate of the base frame (2). The bracket is configured to receive, in pairs, pallets (1) arranged parallel to the base plate of the base frame (2), and is further configured to orthogonally displace the received pallets (1) relative to the base plate of the base frame (2). In the retracted state, the bracket (8) is arranged below the bottom plate of the base frame (2) and shifted parallel to the bottom plate of the base frame (2).

2. The pallet transport vehicle according to claim 1, wherein each lifting device (3) has a chain trolley or belt, the bracket (8) being disposed on the chain trolley or belt, the chain trolley or belt being orthogonally displaced relative to the base frame (2) on the one hand and parallel displaced on the other hand.

3. The pallet transport vehicle according to claim 1, wherein the bracket (8) is capable of being displaced parallel to the base frame (2) within the base frame (2) or within a top frame (12) arranged orthogonally to the base frame (2) and spaced apart from the base frame.

4. The pallet transport vehicle according to any one of claims 1 to 3, having an electric and / or hydraulic drive unit (11) disposed within the base frame (2) or disposed within a top frame (12) orthogonally spaced from the base frame (2), the drive unit being configured to synchronously displace interconnected brackets (8) of the oppositely arranged lifting devices (3).

5. The pallet transport vehicle according to any one of claims 1 to 3, wherein the base frame (2) is designed to be rectangular and provided with four lifting devices (3), wherein two lifting devices (3) are arranged at intervals on one side of the base frame (2).

6. The pallet transport vehicle according to any one of claims 1 to 3, wherein the lifting device (3) is pivotally arranged on the base frame (2).

7. The pallet transport vehicle according to any one of claims 1 to 3, wherein the bracket (8) is configured to engage the respective pallet (1) from below to displace it.

8. The pallet transport vehicle according to any one of claims 1 to 3, having a plurality of rollers (5) disposed on the base frame (2), wherein a corresponding pallet (1) is capable of rolling on the base frame (2) by means of the rollers.

9. An assembly comprising a pallet transport vehicle according to any one of claims 1 to 8 and a plurality of said pallets (1), wherein said pallets (1) are respectively received by two brackets (8) and arranged orthogonally to each other and spaced apart from each other relative to the base frame (2).

10. The component according to claim 9, wherein each of the trays (1) is designed as a container equipment tray (1).

11. The component according to claim 9 or 10, wherein the tray (1) is adapted to the base frame (2) in its extended dimensions.

12. A method for transporting a plurality of pallets (1) using a pallet transport vehicle according to any one of claims 1 to 8, the pallet transport vehicle having: a base frame (2) configured to receive the plurality of pallets (1); and at least two lifting devices (3) arranged opposite to each other on the base frame (2), wherein each lifting device (3) has a plurality of brackets (8) interconnected, wherein in an extended state the brackets (8) are spaced apart from each other in a direction orthogonal to the bottom plate of the base frame (2), the brackets are configured to receive pallets (1) arranged in pairs opposite to each other and parallel to the bottom plate of the base frame (2), and are further configured to displace the received pallets (1) orthogonally relative to the bottom plate of the base frame (2), wherein in a retracted state the brackets (8) are arranged below the bottom plate of the base frame (2) and displaced parallel to the bottom plate of the base frame (2), and the method comprising the steps of: The pallet (1) is orthogonally displaced within the pallet transport vehicle; the bracket (8) is orthogonally displaced relative to the base frame (2) on one hand and parallel on the other.

13. The method according to claim 12, comprising the following steps: Push the tray (1) onto the base frame (2); The tray (1) is moved upward relative to the base frame (2) orthogonally and away from the base frame; Push another tray (1) onto the base frame (2); and The other tray (1) and the already moved tray (1) are moved together.

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