TRANSPORT TROLLEY AND METHOD FOR TRANSFORMING A TRANSPORT TROLLEY

Description

[0001] The present invention relates to transport trolleys comprising a base assembly, two opposing side assemblies arranged on the base assembly, one wheel arranged on each of the side assemblies, and at least one receptacle arranged between the side assemblies for a transport box. Furthermore, the present invention relates to a method for transferring such a transport trolley between a packing mode and a first operating mode. Furthermore, the present invention relates to a method for transferring such a transport trolley between a first operating mode and a second operating mode.

[0002] Such transport trolleys are already known from the state of the art.

[0003] For example, the document DE 197 07 744 C1 shows a collapsible trolley with a substantially cubic container, the opposing first and opposing second side walls of which, when unfolded, extend between the base and a frame having handle elements and closing off the container at the top, wherein the first side walls are mounted on the frame and are hingedly connected to the base, and the second side walls are supportable on the base and each accommodate at least one wheel which is movable between a driving position projecting beyond the wall surface and a rest position lying within the wall surface, wherein the first side walls mounted on the frame and on the base are designed to be foldable in such a way that the frame and the base can be substantially placed on top of one another when the second side walls are pivoted horizontally, and wherein a rod for handling is arranged on the frame,which is movable between a handling position projecting beyond the container and a storage position nestling against the container or located within the container.

[0004] Furthermore, the document WO 2018 / 127409 A1 shows a handcart, in particular for transporting goods, with first vertical struts at a first end of the cart and second vertical struts at a second end of the cart, wherein the first vertical struts are connected to the second vertical struts by diagonal struts, wherein upper ends of the diagonal struts are rotatably connected to the vertical struts, and wherein lower ends of the diagonal struts are rotatably and vertically displaceably connected to the vertical struts, wherein at least one container is also fastened to the upper half of the first vertical struts, and wherein at least one further container is vertically displaceable and connected along the second vertical struts via a guide, and is connected via pivot joints to those diagonal struts whose lower ends are connected to the second vertical struts.

[0005] Further examples of trolleys with foldable side elements and wheels are disclosed in EP 3 216 674 A1, US 9 834 243 B1 and US 2015 / 137487 A1.

[0006] Compared to the known prior art, it is an object of the present invention to provide a transport trolley that is easier to handle. In particular, it is an object of the present invention to provide a transport trolley that can be transformed between different operating modes as easily as possible.

[0007] According to a third aspect of the invention according to claim 1, a transport trolley is proposed with a base assembly, with two side assemblies arranged on the base assembly, opposite one another, and with a wheel arranged on each of the side assemblies, wherein the transport trolley can be transferred or switched between a packing mode, in which each wheel is arranged in a folded-in position and each side assembly in a closed position, and a first operating mode, in which each wheel is arranged in an unfolded position and each side assembly in an unfolded position.is transformable, wherein a movement of each side assembly between the closed and unfolded positions is coupled to a movement of the corresponding wheel between the folded and unfolded positions, such that when each side assembly is moved between the closed and unfolded positions, the corresponding wheel is moved between the folded and unfolded positions, and the transport trolley further comprises a support on each side assembly. Optionally, at least one receptacle for a transport box can be provided between the side assemblies.

[0008] According to a sixth aspect of the invention according to claim 8, there is provided a method for transferring a trolley between a packing mode and a first operating mode, the trolley comprising a base assembly, two opposite side assemblies arranged on the base assembly, and a wheel arranged on each of the side assemblies, the method comprising the following steps: Transferring the trolley from the packing mode, in which each wheel is arranged in a folded position and each side assembly is arranged in a closed position, to a first operating mode, in which each wheel is arranged in an unfolded position and each side assembly is arranged in an unfolded position, by moving the side assemblies from the folded to the unfolded position, wherein the movement of each side assembly between the closed and unfolded positions is coupled to a movement of the corresponding wheel between the folded position and the unfolded position; Transferring the trolley from the first operating mode to the packing mode by moving the side assemblies from the unfolded position to the folded position.

[0009] According to a seventh aspect of the invention according to claim 9, a method for transforming a transport trolley is provided, wherein the transport trolley comprises a base assembly, two opposing side assemblies arranged on the base assembly, a wheel arranged on each of the side assemblies and at least one receptacle arranged between the side assemblies for a respective transport box, the method comprising the following steps: Transferring a transport trolley between a packing mode and a first operating mode according to the method according to the sixth aspect of the invention; and transferring a transport trolley between the first operating mode and a second operating mode, wherein the step of transferring the transport trolley between the first operating mode and the second operating mode comprises the following steps: transferring the transport trolley from the first operating mode to the second operating mode by means of a first actuation, in which an actuation element of an actuation device of the transport trolley is moved in a first direction of movement; and - transferring the transport trolley from the second operating mode to the first operating mode by means of a second actuation, in which the actuation element is moved in the first direction of movement.

[0010] In packing mode, the trolley is compact, particularly when folded up to save space, and therefore takes up little space. This packing mode is therefore particularly suitable for transporting or storing the trolley, for example in the trunk of a car. In particular, the two side assemblies are folded up in packing mode. In other words, the two side assemblies, which are arranged on opposite sides of the base assembly, are folded towards each other in packing mode so that the side assemblies are aligned with each other and rest against the base assembly. The side assemblies extend towards each other along the base assembly. Furthermore, each wheel is preferably folded into the corresponding side assembly. Each side assembly can have a corresponding opening through which the corresponding wheel can be folded in or out.In the folded position, each wheel is preferably completely arranged within the corresponding side assembly. In the unfolded position, each wheel is preferably completely or at least partially unfolded from the corresponding side assembly.

[0011] In the first and second operating modes, the side assemblies are particularly unfolded. In other words, the two side assemblies are arranged parallel to one another in the first and second operating modes. The side assemblies extend, preferably perpendicular to the base assembly, away from the base assembly. Furthermore, each wheel is preferably folded out from the corresponding side assembly so that the transport trolley can be pulled or pushed along the ground via the wheels. The wheels can thus be arranged on the ground or are oriented towards the ground in the first and second operating modes. The wheels are thus arranged on an underside of the transport trolley in the first and second operating modes. The side of the transport trolley opposite the underside is thus referred to as the top side of the transport trolley. The terms "high" and "low" or "top" and "bottom" or "above" and "below" or"Vertical" and "horizontal" are therefore to be understood in relation to the wheels or to the side of the trolley on which the wheels are arranged in the first and second operating modes.

[0012] In the first operating mode, which can also be referred to as operating mode or pull-along mode, the transport trolley can be easily pulled. The first operating mode is therefore particularly suitable for pulling the transport trolley. In particular, in the first operating mode the holder for the transport box is arranged in a transport position. The transport position can also be referred to as the low position, in which the holder is arranged close to the unfolded wheels. A transport box arranged in the holder is therefore arranged low, so that the total weight of the transport box and its contents are closer to a rotation axis of the wheels. This makes the transport box easier to transport.

[0013] In the second operating mode, which can also be referred to as the additional operating mode or push mode, the transport trolley can be easily pushed or loaded. The second operating mode is therefore particularly suitable for pushing or loading the transport trolley. In particular, in the first operating mode the holder for the transport box is arranged in a loading position. The loading position can also be referred to as the high position, in which the holder is arranged further away from the wheels than in the low position. A transport box arranged in the holder is therefore also arranged higher. The loading position is therefore particularly suitable for loading the transport box, as a user does not have to bend down as much or at all to load the transport box.

[0014] To transfer the trolley from packing mode to the first operating mode, both side assemblies are unfolded. In other words, the side assemblies are moved from a closed position to an open position. Since the movement of the side assembly between the closed and open positions is coupled with the movement of the wheels between the folded and unfolded positions, the wheels are automatically unfolded when the side assembly is unfolded. In other words, the wheels are also moved from the folded position to the unfolded position.

[0015] Accordingly, to transfer the trolley from the first operating mode to the packing mode, the side assemblies are folded. In other words, the side assemblies are moved from an open position to a closed position. The wheels are automatically folded in. In other words, the wheels are moved from the extended position to the folded position.

[0016] To transfer the transport carriage from the first operating mode to the second operating mode, the actuating element is moved in the first direction of movement. The actuating element is preferably designed mechanically, for example as a rotatable coupling body, as a lever, as a turntable, or similar. Alternatively, an electrical, hydraulic, or pneumatic drive device can also be provided as the actuating element. To transfer the transport carriage from the second operating mode to the first operating mode, the actuating element is also moved in the first direction of movement. The actuating element can, for example, perform a pumping movement, in particular an alternating movement in the first direction of movement and opposite to the first direction of movement, whereby only the movement in the first direction of movement contributes to transferring the transport carriage. This is particularly advantageous in the case of manual actuation.In the case of actuation by means of a drive device, the drive device only needs to be suitable for executing a movement in one direction of movement, in particular the first direction of movement, which considerably simplifies the requirements for a drive device.

[0017] According to the invention, the transport trolley further comprises a support on each side assembly.

[0018] The supports can be used to support the trolley in the first operating position, allowing the trolley to be placed on the supports and wheels on the ground without a user having to hold the trolley, for example by the handle. The support can, in particular, be a lever element. The lever element can then support the trolley on the ground with its free end. In particular, the lever element can then support the trolley directly on the ground with its free end. In particular, the lever element can have no wheel, i.e., it is designed without a wheel at its free end.

[0019] In a further embodiment of the invention, each support is arranged in a folded position in the packing mode and in an unfolded position in the first operating mode, in particular wherein each support is pivotally mounted on the corresponding side assembly about an axis between the folded position and the unfolded position.

[0020] In this way, the supports can be folded in to save space in the packing mode and unfolded in the first operating mode for operating the transport trolley.

[0021] In a further embodiment of the invention, the movement, in particular pivoting movement, of each side assembly between the folded and unfolded positions is coupled to a movement, in particular pivoting movement, of the corresponding support between the folded and unfolded positions.

[0022] Preferably, when pivoting the side assembly between the folded and unfolded positions, the corresponding support pivots about the axis. In other words, the supports and the side assemblies can be moved or folded together, so that when transferring the transport trolley between the packing mode and the first operating mode, the supports and the side assemblies fold together.

[0023] In a further embodiment of the invention, each support is unfolded when the corresponding side assembly is pivoted from the closed position to the unfolded position and is folded in accordingly when the corresponding side assembly is pivoted from the unfolded position to the closed position.

[0024] In this way, a user can open or close the side assemblies to transfer the trolley between the packing mode and the first operating mode, with the supports being folded out or in accordingly.

[0025] In a further embodiment of the invention, the pivoting movement of each side assembly is coupled both to the pivoting movement of the corresponding wheel and to the pivoting movement of the corresponding support.

[0026] In other words, each side assembly folds together with the corresponding wheel and support. This allows a user to fold and unfold the side assemblies to transition the trolley between packing mode and the first operating mode, with both the wheels and supports being folded and unfolded accordingly.

[0027] In a further embodiment of the invention, the movement, in particular pivoting movement, of each support and / or each wheel is coupled via a toggle lever to the movement, in particular pivoting movement, of the corresponding side assembly, wherein each toggle lever is arranged, in particular stretched, in the unfolded position of the corresponding wheel or the corresponding support, in particular in the first operating mode, such that the respective wheel or the respective support is blocked, locked, or held in the unfolded position. In particular, each toggle lever is arranged bent in the folded position of the corresponding wheel or the corresponding support, in particular in the packing mode.

[0028] In this way, the toggle lever remains in the extended state when a thrust force acts in the direction of the toggle lever's extension. Accordingly, each toggle lever holds the respective wheel or support in the extended position when the toggle lever is extended. The toggle levers thus ensure that a wheel or support cannot be folded in by a torque applied about its bearing axis on the corresponding side assembly. The wheel or support can therefore only be folded in by a folding or pivoting movement of the corresponding side assembly.

[0029] In particular, it can be provided that each toggle lever is coupled to the pivoting movement of the wheel or support via a further lever, so that an extension or bending movement of each toggle lever, in particular a change in the angle of each toggle lever, is transmitted to a pivoting movement of each wheel or support. Accordingly, a pivoting movement of each wheel or support leads to an extension or bending of the corresponding toggle lever, whereby the toggle lever cannot be bent by a pivoting movement of the wheel or support when the toggle lever is extended.

[0030] In a further embodiment of the invention, each toggle lever is arranged in such a way that it is stretched when the wheel or support is transferred from the folded into the unfolded position and is correspondingly bent when the wheel or support is transferred from the unfolded into the folded position.

[0031] As already described above, this ensures in a simple manner that each wheel or support can be folded, in particular folded in or out, only by a folding or pivoting movement of the corresponding side assembly.

[0032] In a further embodiment of the invention, the transport trolley further comprises a locking device which is designed to lock each side assembly in the folded position and in the unfolded position.

[0033] In this way, the side assemblies can be locked or held in the closed position in packing mode and in the unfolded position in the first or second operating mode. The locking device thus secures the side assemblies against unintentional pivoting.

[0034] In a further embodiment of the invention, the transport carriage further comprises at least one second actuating element by means of which the locking of the side assemblies effected by the locking device can be released.

[0035] If the second actuating element is actuated, the locking of the side assemblies is released so that the side assemblies can be moved between the closed and the opened position.

[0036] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

[0037] Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. They show: Fig. 1 is an isometric view of a front side of an embodiment of a trolley in a packing mode; Fig. 2 is an isometric view of a rear side of the trolley of Fig. 1 ; Fig. 3 a top view of the front of the trolley from Fig. 1 ; Fig. 4 a top view of the top of the trolley from Fig. 1 ; Fig. 5a side view of the transport trolley from Fig. 1 ; Fig. 6 an isometric view of the rear of the trolley from Fig. 1 with transport box in a recess; Fig. 7 a top view of the rear of the transport trolley from Fig. 1 with transport box in the recess; Fig. 8 an isometric view of the rear of the transport trolley from Fig. 1 with straps mounted; Fig. 9 an isometric view of the front of the trolley from Fig. 1 in a first operating mode; Fig. 10 a side view of the transport trolley from Fig. 9; Fig. 11 a plan view of the front of the trolley from Fig. 9 ; Fig. 12 a top view of the top of the trolley from Fig. 9 ; Fig. 13 an isometric view of the front of the trolley from Fig. 9 with box on a support; Fig. 14 an isometric view of the front of the trolley from Fig. 9 with box on the support and transport box in a second shot; Fig. 15 an isometric view of the front of the transport trolley from Fig. 14 when pulling; Fig. 16 a side view of the trolley from Fig. 15 ; Fig. 17 an isometric view of the front of the trolley from Fig. 9 with the support arranged in the vertical position; Fig. 18 an isometric view of the front of the trolley from Fig. 19 with transport box in a first shot; Fig. 19 an isometric view of a front side of the transport trolley from Fig. 1in a second operating mode; Fig. 20 a side view of the transport trolley from Fig. 19 ; Fig. 21 a plan view of the front of the trolley from Fig. 19 ; Fig. 22 a top view of the top of the trolley from Fig. 19 ; Fig. 23 a plan view of a front side of the trolley from Fig. 1 when releasing the locking device; Fig. 24 a plan view of a front side of the trolley from Fig. 1 when closing the locking mechanism; Fig. 25 a side view of the trolley from Fig. 1 when unfolding; Fig. 26 a top view of the top of the trolley from Fig. 1 when unfolding the side assemblies; Fig. 27 a side view and a top view of a top of the trolley from Fig. 1 when folding the side assemblies; Fig. 28 a sectional view of an embodiment of a side assembly in the packing mode; Fig. 29 a sectional view of the side assembly from Fig. 28in the first operating mode; Fig. 30 a sectional view of the side assembly from Fig. 28 in the packing mode when transferring from the packing mode to the first operating mode; Fig. 31 a sectional view of the side assembly from Fig. 28 in an arrangement between the packing mode and the first operating mode when transferring from the packing mode to the first operating mode; Fig. 32 a sectional view of the side assembly from Fig. 28 in the first operating mode when transferring from the packing mode to the first operating mode; Fig. 33 a side view of the transport trolley from Fig. 9 when pulling out the handle and two detailed views of an operating element; Fig. 34 a side view of the trolley from Fig. 9 when inserting the handle and two detailed views of an operating element; Fig. 35 a side view of the trolley from Fig. 19 when transforming into the second operating mode; Fig. 36 a side view of the transport trolley from Fig. 19when transforming into the second operating mode with transport boxes and detailed views of the operation; Fig. 37 a side view of the transport trolley from Fig. 19 when transforming into the first operating mode with transport boxes and detailed views of the operation; Fig. 38 a side view of the transport trolley from Fig. 19 when adjusting the handle height and detailed views of the operation; Fig. 39 two sectional views of an embodiment of a coupling mechanism in a free-rotation position; Fig. 40 two sectional views of the coupling mechanism from Fig. 39 in a locking position; Fig. 41 two sectional views of the coupling mechanism from Fig. 39 in a coupling position; Fig. 42 Various views of an embodiment of a coupling device; Fig. 43 a schematic view of a coupling device in a base assembly of the transport carriage from Fig. 1; Fig. 44 a schematic view of an embodiment of an actuating device in the base assembly of the transport carriage from Fig. 1 in a first stop position; Fig. 45 a schematic view of the actuating device from Fig. 44 between the first stop position and a second stop position; Fig. 46 a schematic view of the actuating device from Fig. 44 between the second stop position and the first stop position; Fig. 47 a schematic view of the actuating device from Fig. 44 in a first stop position; Fig. 48 a schematic view of the actuating device from Fig. 44 in the first stop position; Fig. 49 a schematic view and a detailed view of a release mechanism in the base assembly of the trolley from Fig. 1 ; Fig. 50 a schematic view and a detailed view of the unlocking mechanism from Fig. 49when unlocking; Fig. 51 another embodiment of an actuating device; Fig. 52 an embodiment of a transfer mechanism of a receptacle of the transport carriage from Fig. 1 in the transport position; Fig. 53 an embodiment of the transfer mechanism from Fig. 52A between the transport position and a loading position; Fig. 54 an embodiment of the transfer mechanism from Fig. 52A in the loading position Fig. 55 a detailed view of the transfer mechanism from Fig. 52 ; Fig. 56 a detailed view of the transfer mechanism from Fig. 53 ; Fig. 57 a detailed view of the transfer mechanism from Fig. 54 ; Fig. 58 a sectional view of the side assembly from Fig. 28 in the first operating mode; Fig. 59 a sectional view of the side assembly from Fig. 28 in the second operating mode; Fig. 60 a sectional view of the side assembly from Fig. 56in the first operating mode when transferring from the first operating mode to the second operating mode; Fig. 61 a sectional view of the side assembly from Fig. 56 in an arrangement between the first operating mode and the second operating mode when transferring from the first operating mode to the second operating mode; Fig. 62 a sectional view of the side assembly from Fig. 56 in the second operating mode when transferring from the first operating mode to the second operating mode; Fig. 63 three views of an embodiment of a braking device of the transport carriage from Fig. 1 ; Fig. 64a side view of the transport trolley from Fig. 1 in the second operating mode when inserting a transport box into the first receptacle; Fig. 65 a side view of the transport trolley from Fig. 64 when inserting the transport box into the first receptacle; Fig. 66 a side view of the transport trolley from Fig. 1in the second operating mode with a transport box in the first receptacle; Fig. 67 a side view of the transport trolley from Fig. 1 in the second operating mode when removing a transport box from the first receptacle; Fig. 68 a side view of the transport trolley from Fig. 67 when removing the transport box from the first holder; Fig. 69 a side view of the transport trolley from Fig. 1 in the second operating mode when inserting a transport box into the second receptacle; Fig. 70 a side view of the transport trolley from Fig. 69 with a transport box in the second receptacle after inserting the transport box into the second receptacle; Fig. 71 a side view of the transport trolley from Fig. 1 in the second operating mode before removing a transport box from the second receptacle; Fig. 72 a side view of the transport trolley from Fig. 71 when removing the transport box from the second holder; Fig. 73 a side view of the transport trolley from Fig. 1 in the second operating mode when inserting a transport box into the first receptacle; Fig. 74 a side view of the transport trolley from Fig. 73 when inserting a transport box into the first receptacle; Fig. 75 a side view of the transport trolley from Fig. 73 with a transport box in the first receptacle after inserting the transport box into the first receptacle; Fig. 76 a side view of the transport trolley from Fig. 1 in the first operating mode with a transport box in the first receptacle before removing the transport box from the first receptacle; Fig. 77 a side view of the transport trolley from Fig. 76 when removing the transport box from the first holder; Fig. 78 a side view of the transport trolley from Fig. 1 in the first operating mode when inserting a transport box into the second receptacle; Fig. 79 a side view of the transport trolley from Fig. 78with a transport box in the second holder after inserting the transport box into the second holder; Fig. 80 a side view of the transport trolley from Fig. 1 in the first operating mode with a transport box in the second receptacle before removing the transport box from the second receptacle; Fig. 81 a side view of the transport trolley from Fig. 80 when removing the transport box from the second receptacle; Fig. 82 shows a schematic view of an embodiment of a method for transferring a transport trolley between the first and the second operating mode; Fig. 83 shows a schematic view of an embodiment of a method for transferring a transport trolley between the packing mode and the first operating mode; and Fig. 84 shows a schematic view of an embodiment of a method for transforming a transport trolley.

[0038] The Figures 1 to 5show an embodiment of a trolley 10. The trolley 10 is arranged in a packing mode 12. The packing mode is particularly suitable for storing or transporting the trolley 10. The trolley 10 has a base assembly 14, two side assemblies 16, two wheels 18, and a handle 20. The wheels 18 can also be referred to as rear wheels.

[0039] The transport carriage 10 has a top side 32, a bottom side 34, a front side 36, and a back side 38. The sides of the transport carriage 10 are arranged in space with respect to a Cartesian coordinate system 60. The y-direction of the coordinate system 60 is oriented vertically and thus corresponds in particular to a vertical direction. The y-direction and z-direction of the coordinate system 60 are oriented horizontally. The top side 32 and the bottom side 34 are arranged on opposite sides of the transport carriage 10 in the y-direction. The front side 36 and the back side 38 are arranged on opposite sides of the transport carriage 10 in the z-direction.

[0040] The base assembly 14 has a top side 62, a bottom side 64, a front side 66, a back side 68, a first outer side 70, and a second outer side 72. The top side 62 and the bottom side 64 are arranged on opposite sides of the base assembly 14 in the y-direction. The front side 66 and the back side 68 are arranged on opposite sides of the base assembly 14 in the z-direction. The first outer side 70 and the second outer side 72 are arranged on opposite sides of the base assembly 14 in the x-direction.

[0041] Each side assembly 16 has a top side 42, a bottom side 44, an outer side 40, an inner side 41, a first edge side 46, and a second edge side 48. The top side 42 and the bottom side 44 are arranged on opposite sides of the respective side assembly 16 in the y-direction. In the packing mode 12, the outer side 40 and the inner side 41 are arranged on opposite sides of the respective side assembly 16 in the z-direction. In the packing mode 12, the first edge side 46 and the second edge side 48 are arranged on opposite sides of the respective side assembly 16 in the x-direction.

[0042] The side assemblies 16 are arranged on the base assembly 14. The side assemblies 16 are arranged opposite one another. The side assemblies 16 are arranged on opposite sides of the base assembly 14. In particular, one side assembly 16 is pivotally mounted on each of the first and second outer sides 70, 72 of the base assembly 14, so that each side assembly 16 can be pivoted between a closed position 76, in which the side assembly 16 rests against the base assembly, and an unfolded position 80, in which the side assembly 16 extends away from the base assembly, preferably perpendicularly.

[0043] In packing mode 12, the side assemblies 16 are arranged in the folded position 76. In packing mode 12, the side assemblies 16 extend from the outer sides 70, 72 along the front side 66 toward one another. The side assemblies 16 are arranged in alignment with one another in the x-direction. In particular, the outer sides 40 of the side assemblies 16 are arranged parallel to one another and lie in one plane.

[0044] One of the wheels 18 is arranged on each side assembly 16. Each wheel 18 is pivotally mounted on the corresponding side assembly 16 about an axis, so that the wheel 18 can be moved between a folded position 74, in which the wheel 18 is folded into the corresponding side assembly 16, and an unfolded position 78, in which the wheel 18 is unfolded from the corresponding side assembly. The unfolded position 78 can also be referred to as the first unfolded position. For pivotal mounting, each wheel is arranged in the corresponding side assembly 16 via a third arm 124, with each third arm 124 being pivotally mounted on the corresponding side assembly 16. Each wheel 18 is arranged at one end of the respective third arm 124, with the bearing point of the pivot axis being arranged at the other, opposite end of the respective third arm 124. The third arm 124 is in the Figures 1 to 5 not shown and will be calculated later based on the Figures 28 and 29 described in more detail.

[0045] Each side assembly 16 has a first opening 28 through which the wheel can be folded into or out of the side assembly. The first opening 28 is located on the second outer side 48 and / or on the underside 44 of the corresponding side assembly 16.

[0046] The transport trolley 10 further comprises a first actuating element 22. By actuating the first actuating element 22, the handle 20 can be adjusted, for example. For example, the handle can be extended from the base assembly 14 into an extended position 106 upon actuation. The handle 20 can also be pivoted relative to the base assembly 14 upon another actuation. In the packing mode 12, the handle is arranged in a retracted position 104 and not pivoted.

[0047] The transport carriage 10 further comprises two second actuating elements 24. Each of the second actuating elements 24 is arranged on one of the side assemblies 16. By actuating one of the second actuating elements 24, a locking mechanism of the corresponding side assembly 16 can be released, allowing the side assembly 16 to pivot.

[0048] The transport trolley 10 further comprises a third actuating element 26. By actuating the third actuating element 26, a parking brake for the wheels 18 can be activated or released.

[0049] The side assemblies 16 each have recesses 30. The recesses 30 are arranged on the outer side 40 of each side assembly 16. Preferably, the recesses are arranged in an upper part of the outer side 40, in particular close to the upper side 42. The recesses 30 serve to allow a user to reach into the recesses 30 to open or close the side assemblies. The recesses 30 can also be referred to as grip recesses.

[0050] The base assembly 14 has a recess 50 arranged on the rear side 68 of the base assembly 14. A transport box can be arranged in the recess 50. On the side of the recess 50 facing the underside 64, the base assembly 14 has two projections 52. The projections 52 serve to hold a transport box in the recess 50.

[0051] The transport trolley 10 further comprises a support 54. The support 54 can also be referred to as a bottom flap. The support 54 preferably comprises a support surface on which, for example, a crate or box can be placed for transport. The support 54 is pivotably mounted on the base assembly 14 between a vertical position 82, in which a support surface of the support 54 is arranged vertically, and a horizontal position 84, in which the support surface of the support 54 is arranged horizontally. In packing mode, the support 54 is arranged in the vertical position 82.

[0052] The Figures 6 and 7 show the back of the trolley 10 from the Fig. 1 to 5, wherein a transport box 56 is arranged in the recess 50 of the base assembly 14. The transport box 56 is folded. The transport box 56 is arranged upright in the recess 50. The projections 52' and 52" are designed to hold the transport box 56 in the recess 50.

[0053] Fig. 8 shows the back of the trolley from the Figures 1 to 6 , with two straps 58 attached to the back of the base assembly for carrying the trolley 10.

[0054] Figures 9 to 12 show the transport trolley Fig. 1 in a first operating mode 86. The first operating mode 86 is particularly suitable for transporting transport boxes on the transport trolley or generally for pulling the transport trolley 10 by the handle 20. The first operating mode 86 can therefore also be referred to as the pull-along mode.

[0055] In the first operating mode 86, the side assemblies 16 are each arranged in a folded-out position 80. In the folded-out position 80, the side assemblies 16 extend away from the base assembly 14, preferably perpendicularly. The side assemblies 16 are arranged parallel to one another in the z-direction. In particular, the outer sides 40 of the side assemblies 16 are arranged parallel to one another and do not lie in one plane.

[0056] In the first operating mode 86, the outer side 40 and the inner side 41 of each side assembly 16 are arranged in the x-direction on opposite sides of the respective side assembly 16. In the first operating mode, the first edge side 46 and the second edge side 48 are arranged in the z-direction on opposite sides of the respective side assembly 16.

[0057] In the first operating mode 86, the wheels 18 are each arranged in the unfolded position 78. In the first operating mode 86, the handle 20 is arranged in the extended position 106.

[0058] The transport trolley 10 further comprises a first receptacle 93 for a transport box. The first receptacle 93 is formed by two first receptacle elements 94. The two first receptacle elements 94 are identified in the figures by the reference numerals 94' and 94" for differentiation. A first receptacle element 94 is arranged on each side assembly 16. The first receptacle elements 94 are each arranged on the inner side 41 of the corresponding side assembly 16. In other words, the first receptacle 93 is arranged between the side assemblies 16 in the first operating mode 86.

[0059] Each first receiving element 94 is arranged on a corresponding side assembly 16 via a respective first arm 96. Each first arm 96 is pivotably mounted about an axis on the inner side 41 of the corresponding side assembly 16. In the first operating mode 86, these pivot axes run parallel to the x-direction. The pivot axes of the arms 96 are, in particular, aligned with one another. Each receiving element 94 is arranged at one end of the respective first arm 96, with the bearing point of the pivot axis being arranged at the other, opposite end of the respective first arm 96.

[0060] By means of the first arms 96, the first receptacle 93 can be pivoted between a transport position 108 and a loading position 110. In the transport position 108, the first receptacle 93 is arranged lower in the y-direction, in particular closer to the underside 34 of the transport carriage 10, than in the loading position 110.

[0061] The transport carriage 10 further comprises a second receptacle 97, a transport box. The second receptacle 97 is formed by two second receptacle elements 98. A second receptacle element 98 is arranged on each side assembly 16. The second receptacle elements 98 are each arranged on the inner side 41 of the corresponding side assembly 16. In other words, the second receptacle 97 is arranged between the side assemblies 16 in the first operating mode 86.

[0062] In the transport position 108, the first receptacle 93 is arranged below the second receptacle in the y-direction. The first receptacle 93 is arranged closer to the bottom side 34 than the second receptacle. In other words, the first receptacle 93 and the second receptacle 97 are arranged one above the other.

[0063] The transport trolley 10 further comprises two supports 88. One support 88 is arranged on each side assembly 16. Each support 88 is arranged on the corresponding side assembly 16 so as to be pivotable about an axis between a folded-in position 90 and a folded-out position 92. In the first operating mode, the pivot axes run in the x-direction. The pivot axes are also aligned with one another. In the packing mode 12, the supports 88 are each arranged in the folded-in position 90. In the first operating mode, the supports 88 are each arranged in the folded-out position 92. One or each support 88 can in particular be a lever element. The lever element can then support the transport trolley on the ground with its free end. In particular, the lever element or the support 88 can then support the transport trolley 10 directly on the ground with its free end. In particular, the lever element orthe support 88 does not have a wheel. The lever element or the support 88 can be designed without a wheel at its free end.

[0064] The transport trolley 10 further comprises two support wheels 100. One support wheel 100 is arranged on each side assembly 16. Each support wheel 100 is pivotable about an axis on the corresponding side assembly 16, so that the support wheel 100 can be moved between a folded position 118, in which the support wheel 100 is folded into the corresponding side assembly 16, and an unfolded position 120, in which the support wheel 100 is unfolded from the corresponding side assembly.

[0065] Each support wheel 100 is arranged on the corresponding side assembly 16 via a second arm 122. Each second arm 122 is pivotally mounted about an axis in the corresponding side assembly 16. In the first operating mode 86, these pivot axes run parallel to the x-direction. The pivot axes of the second arms 122 are, in particular, aligned with one another. Each support wheel 100 is arranged at one end of the respective second arm 122, with the bearing point of the pivot axis being arranged at the other, opposite end of the respective second arm 122.

[0066] Each side assembly 16 has a second opening 102 through which the corresponding support wheel 100 can be folded into or out of the side assembly 16. The first opening 28 is arranged on the first outer side 48 of the corresponding side assembly 16.

[0067] In the Figures 9 to 12The support 54 is arranged in the horizontal position 84. In the horizontal position 84, the support 54 is arranged between the first receiving elements 94 and thus blocks the first receptacle. In order to insert a transport box into the first receptacle 93, the support 54 must be moved to the vertical position 82. Alternatively, the support 54 can also be arranged lower than the receiving elements 94 so that the first receptacle 93 is not blocked.

[0068] In principle, the support 54 can be arranged in the first operating mode 86 in both the vertical position 82 and the horizontal position 84. In the horizontal position 84, for example, a box can be transported on the support surface of the support 54.

[0069] Fig. 13 shows the transport carriage 10 according to the Figures 9 to 12 , wherein a box 112 with bottles is arranged on the support surface of the support 54.

[0070] The Figures 14 to 16 show the transport carriage 10 according to the Fig. 13 , wherein a transport box 114 is arranged in the second receptacle. To pull the transport trolley 10, the transport trolley 10 is, as shown in the Figures 15 and 16 shown, tilted relative to a horizontal about an axis of rotation of the wheels 18, so that the supports 88 are released from the ground and the transport trolley 10 can be pulled.

[0071] Fig. 17 shows the transport carriage 10 according to the Figures 9 to 12 , wherein the support 54 is arranged in the vertical position 82.

[0072] Fig. 18 shows the transport carriage 10 accordingly Fig. 17 , wherein a transport box 116 is arranged in the first receptacle 93.

[0073] The Figures 19 to 22show the transport trolley 10 in a second operating mode 126. The second operating mode 126 is particularly suitable for loading transport boxes onto the transport trolley or generally for pushing the transport trolley 10 via the handle 20. The second operating mode 126 can therefore also be referred to as pushing mode.

[0074] In the second operating mode 126, the handle 20 is arranged in the extended position 106. The handle is pivotably mounted on the base assembly 14 about an axis. The axis runs parallel to the x-direction. Compared to the orientation in the first operating mode 86, in which the handle extends parallel to the y-direction, the handle 20 is pivoted in the zy plane about the axis in the direction away from the side assemblies 16.

[0075] In the second operating mode 126, each side assembly 16 is arranged in the unfolded position 80. In the second operating mode 126, each support wheel is arranged in the unfolded position 120. In the second operating mode 126, the second receptacle 97 is arranged in the loading position.

[0076] In the second operating mode 126, each wheel 18 is arranged in a further unfolded position 132, which may also be referred to as a second unfolded position. In the further unfolded position 132, each wheel is further unfolded than in the unfolded position 78. In particular, each wheel 18 is arranged lower in the y-direction relative to the underside 44 of the side assemblies than in the unfolded position 78. In other words, in the y-direction, a distance of the rotational axis of the wheels 18 from the underside 44 in the corresponding side assembly 16 is greater in the further unfolded position 132 than in the unfolded position 78.

[0077] Furthermore, in the second operating mode 126, each support 88 is arranged in a folded-back position 134. The folded-back position 134 is arranged in an angular range about the corresponding axis between the folded-in position 90 and the unfolded position 92. In particular, each second arm 122 has a recess into which the corresponding support can be folded when the support wheels are unfolded. In the folded-back position 134, each support wheel is arranged in the recess of the corresponding arm.

[0078] In the loading position 110, the first receptacle 93 and the second receptacle 97 are arranged at the same height with respect to the y-direction. In the x-direction, the first receptacle 93 and the second receptacle 97 are arranged side by side.

[0079] A first transport box 128 can be arranged in the first receptacle 93. A second transport box 130 can be arranged in the second receptacle.

[0080] In Fig. 23 and 24 A mechanism is shown by means of which the side assemblies 16 can be locked in both the closed position 76 and the unfolded position 80. For this purpose, the transport carriage 10 has a locking device 136 for each side assembly 16. The locking device 136 has a pin 138 which, in the closed position 76 and in the unfolded position 80, can be engaged with a corresponding recess on the base assembly 14 in order to hold the side assemblies in the closed position 76 and in the unfolded position 80, respectively. Each pin 138 is arranged on the underside of the corresponding side assembly 16.

[0081] Each pin 138 can be disengaged from the corresponding recess by actuating the corresponding second actuating element 24, so that the corresponding side assembly 16 can be pivoted about the respective pivot axis between the folded position 76 and the unfolded position 80. For this purpose, each pin is connected to the corresponding actuating element 24 via a cable 140, which is tensioned upon actuation of the actuating element, so that the pin is pulled out of the corresponding recess. Preferably, the cable 140 runs along the pivot axis of the respective side assembly 16. In other words, the cable is guided from the underside to the top of the side assembly 16 by the bearing of the corresponding side assembly 16 on the base assembly.

[0082] In Fig. 23It is shown that when an actuating element 24 is actuated, the corresponding pin 138 is pulled out of the respective recess. Fig. 24 It is shown that the corresponding pin 138 is moved back into the respective recess when the actuation element 24 is no longer actuated.

[0083] In the Figures 25 to 27 A mechanism is shown by which the side assemblies 16 can be opened or closed. For this purpose, each side assembly 16 is pivotally mounted on the base assembly 14 about a pivot axis 142.

[0084] In the Figures 25 and 26 The unfolding of the side assemblies 16 is shown. First, as shown in Fig. 25 shown, the actuating elements 24 are actuated to release the locking of the locking device 136. Then, as in Fig. 26shown, each side assembly 16 is pivoted about the corresponding pivot axis 142 from the closed position 76 to the unfolded position 80.

[0085] In the views of the Figure 27 The folding of the side assemblies 16 is shown. First, as shown in view (A) of the Fig. 27 shown, the actuating elements 24 are actuated to release the locking of the locking device 136. Then, as shown in view (B) of the Fig. 27 As shown, each side assembly is pivoted about the corresponding pivot axis 142 from the unfolded position 80 to the folded position 76.

[0086] The Figures 28 and 29 a mechanism is shown by means of which a wheel 18 and a support 88 can be folded out or folded in from a side assembly 16. In Fig. 28the side assembly 16 is arranged in the folded position 76. Accordingly, the trolley 10 is arranged in the packing mode 12, the wheel 18 in the folded position 74 and the support 88 in the folded position 90. In Fig. 29 the side assembly 16 is arranged in the unfolded position 80. Accordingly, the transport carriage 10 is arranged in the first operating mode 86, the wheel 18 is arranged in the unfolded position 78, and the support 88 is arranged in the unfolded position 92.

[0087] For the mechanism for folding and unfolding the wheel 18 and the support 88, the side assembly 16 has a cable 144, a first toggle lever 146, a first lever 154, a second lever 156, another cable 168, a third lever 174 and a fourth arm 172.

[0088] A first end of the cable 144 is pulled when the side assembly 16 is unfolded. A spring element is arranged at the other end of the cable 144, which is tensioned when the first end is pulled. When the side assembly 16 is folded back, the cable 144 is released, so that the cable is pulled in the opposite direction due to the restoring force of the spring element.

[0089] The toggle lever 146 has a first lever element 148 and a second lever element 150. The cable pull 144 is coupled to the first fastening element 148. For this purpose, the cable pull 144 is attached or fastened to the first lever element 148 at a fastening point 152.

[0090] The first lever element 148 is coupled to the second lever 156. The second lever element 150 is coupled to the first lever 154. The first lever element 148, the second lever element 150, and the first lever 154 each have a straight shape. The second lever 156 has a bent, in particular L-shaped or boomerang-shaped, shape.

[0091] On the side of the second lever 156 facing away from the first lever element 148, a wheel 158 is rotatably arranged. The wheel 158 is arranged at a first end of a cup curve 160. The wheel 158 can only move along the guide provided by the cup curve 160. The cup curve is rigidly connected to a third lever element 162. The third lever element 162, together with a fourth lever element 163, forms a second toggle lever 165. The third lever element 162 is coupled to the fourth lever element 163. The fourth lever element 163 is coupled to the support wheel 100 of the side assembly 16. The second toggle lever 165 and the cup curve 160 are not moved when the side assembly 16 is unfolded or folded in. Likewise, the wheel remains arranged at the first end of the cup curve 160. The function of the second toggle lever 165 and the pot cam 160 is described with reference to the Figures 58 to 62 explained in detail.

[0092] The first lever 154 is freely rotatably mounted on a pivot axis 166. The third arm 124 of the wheel 18 is also freely rotatably mounted on the pivot axis 166, with the pivoting movements of the first lever 154 and the third arm 124 being coupled to one another. In particular, the first lever 154 and the third arm 124 are rotationally fixedly coupled to one another about the pivot axis 166. The third lever 174 is coupled to the support 88 via the arm 172. The third lever 174 is also freely rotatably mounted on the pivot axis 166.

[0093] The third lever 174 is rotationally fixedly coupled to a deflection pulley around which the further cable 168 runs. This deflection pulley is also freely rotatably mounted on the pivot axis 166. A pulling movement of the cable 168 is transmitted to a rotating movement of the deflection pulley and thus also to a pivoting movement of the third lever 174. A first end of the cable 168 is coupled to the second lever 156. The first end of the cable 168 is attached or fastened to a fastening point 178 on the second lever 156. The second end of the cable 168 is coupled to a spring element 180, wherein the spring element 180 is tensioned when the cable 168 is pulled towards the first end. Furthermore, the cable 168 is deflected around a deflection pulley 170. The deflection pulley 170 is arranged with respect to the course of the cable 168 between the deflection pulley mounted on the pivot axis 166 and the second lever 156.

[0094] In other words, the toggle lever 146 is coupled directly to the arm 124 of the wheel 18 via the lever 154 and to the arm 172 of the support 88 via the cable 168 and the lever 174. As a result, a pivoting movement of the wheel 18 between the folded position 74 and the unfolded position 78 and a pivoting movement of the support 88 between the folded position 90 and the unfolded position 92 are coupled to one another.

[0095] The support has a stop element 176 which rests against the pivot axis 166 in the folded position 90 of the support 88.

[0096] In Figure 28 The side assembly 16 is arranged in the folded position 76. The toggle lever 146 is bent. In other words, the first lever element 148 and the second lever element 150 form an angle with each other that is less than 90°. The angle is preferably 10° to 30°, in particular 15°.

[0097] In Figure 29 the side assembly 16 is arranged in the unfolded position 80. In this case, the toggle lever 146 is extended. In other words, the first lever element 148 and the second lever element 150 form an angle of substantially 180° with each other. The first lever element 148 and the second lever element 150 are thus arranged collinearly. Furthermore, the lever 154 and the lever 174 are arranged opposite the Fig. 28 The arrangement shown is rotated about the pivot axis 166. The angle of rotation is selected such that the wheel 18 and the support 88 are transferred from the respective folded-in position to the corresponding unfolded position. The angle of rotation is preferably less than 180°, more preferably 150° to 175°, in particular 165°.

[0098] Preferably, it can also be provided that the pivoting movement of the support 54 between the vertical position 82 and the horizontal position 84 is also coupled to the pivoting movement of the side assemblies 16 between the closed position 76 and the unfolded position 80, so that the support 54 is pivoted from the vertical position 82 to the horizontal position 84 when the side assemblies 16 are pivoted from the closed position 76 to the unfolded position 80, and is pivoted from the horizontal position 84 to the vertical position 82 when the side assemblies 16 are pivoted from the unfolded position 80 to the closed position 76.

[0099] In the Figures 30 to 32 shows how the individual components of the side assembly interact when the side assembly is unfolded so that the wheel 18 and the support 88 are folded out.

[0100] When the side assembly 16 is unfolded, the cable 144 is pulled at the first end in the direction of the Fig. 30 The cable 144 is pulled in the direction of the arrow shown. Since the cable 144 is connected to the first lever element 148 of the toggle lever 146, the first lever element 148 is pulled in the same direction. In the process, the toggle lever 146 is gradually stretched. In other words, the angle formed by the first lever element 148 and the second lever element 150 increases the more the cable 144 is pulled.

[0101] When the toggle lever 146 is extended, the first lever 154 is rotated about the pivot axis 166, and the end of the second lever 156 facing the first lever element 148 is raised. Rotating the lever 154 pivots the arm 124 about the pivot axis 166, thus extending the wheel 18. Raising the second lever 156 pulls the cable 168 toward the first end attached to the second lever. Since a pulling movement of the cable 168 is coupled with a pivoting movement of the third lever 174, the support 88 is thereby extended.

[0102] Fig. 30 shows the initial state of the unfolding movement, in which the side assembly 16 is in the folded position 76 and the wheel and the support are each arranged in the folded position and the first toggle lever 146 is completely angled.

[0103] Fig. 31shows an intermediate state of the unfolding movement in which the side assembly 16 is partially unfolded and the wheel and the support are each partially unfolded and the first toggle lever 146 is partially extended.

[0104] Fig. 32 shows the final state of the unfolding movement, in which the side assembly 16 is in the unfolded position 80 and the wheel and the support are each in the unfolded position and the first toggle lever 146 is fully extended.

[0105] The closing movement of the side assembly 16 also proceeds accordingly. When closing, the cable 144 is relaxed, so that the spring element, which is arranged at the second end of the cable 144, due to the restoring force, moves the cable 144 against the direction of the Fig. 30shown arrow. This bends the first toggle lever and lowers the second lever 156. The second cable is thereby released, so that the spring element 180 pulls the cable 168 toward the second end. Since a pulling movement of the cable 168 is coupled with a pivoting movement of the third arm 124 and the third lever 174, the wheel 18 and the support 88 are thereby folded in.

[0106] In the Figures 33 and 34 A mechanism is shown by which the handle 20 can be extended and retracted. In particular, the handle 20 can be moved between the retracted position 104 and the extended position 106 by means of this mechanism.

[0107] The handle 20 has a handle bar 182 and a handle extension 184 at each end of the handle bar 182. The handle bar 182 is provided so that a user of the trolley can grasp the handle 20 at the handle bar 182 to move the trolley. The handle bar 182 extends in the x-direction, and each handle extension 184 extends in the y-direction. The handle extensions are thus arranged parallel to one another.

[0108] The base assembly 14 has a drawer 186 in which the two handle extensions 184 can be arranged. For this purpose, the drawer 186 also extends in the y-direction. In particular, the handle extension 184 can be inserted into or pulled out of the drawer 186.

[0109] In Fig. 33It is shown that the actuating element 22 is actuated to extend the handle 20. This releases the locking of the handle 20 in the drawer 186, so that the handle can be moved from the retracted position 104 to the extended position 106 along the y-direction.

[0110] In Fig. 34 It is shown that the actuating element 22 is also actuated to insert the handle 20. This releases the locking of the handle 20 in the drawer 186, so that the handle can be moved from the extended position 106 to the retracted position 104 along the y-direction.

[0111] In Fig. 35shown how the transport carriage 10 is transformed or transferred from the first operating mode 86 to the second operating mode 126. The transformation is effected by a pivoting movement of the handle 20. As previously described, in the extended position 106, the handle is pivotable relative to the base assembly 14 about a pivot axis 194 that runs parallel to the x-direction. The handle 20 is moved, for example, from a first pivot position 188 to a second pivot position 190. Preferably, only a movement in one direction of rotation about the pivot axis 194 is used for the transformation. In other words, a pivoting movement from the first pivot position 188 to the second pivot position 190 is used for the transformation, while a movement of the handle in the opposite direction is not used.

[0112] In other words, a movement in a rotational direction about the pivot axis 194 from the first pivot position 188 to the second pivot position 190 is coupled with a movement of each support wheel 100 and the first receptacle 93 to transfer the support wheel 100 from the folded position 118 to the unfolded position 128 and to transfer the first receptacle 93 from the transport position 108 to the loading position 110. Furthermore, this pivoting movement is also partially coupled with the pivoting movement of the wheels 18 and the support 88 to transfer the wheels 18 from the first unfolded position 78 to the second unfolded position 132 and to transfer the supports 88 from the unfolded position to the folded-back position 134.Furthermore, a movement in an opposite direction of rotation about the pivot axis 194 from the second pivot position 190 to the first pivot position 188 is not coupled to the movements of the support wheel 100, each wheel 18, each support 88 and the first receptacle 93.

[0113] When in Fig. 35During the transfer from the first operating mode 86 to the second operating mode 126 as shown, the handle 20 is moved one or more times from the first pivot position 188 to the second pivot position 190 or between the first and second pivot positions 188, 190. In doing so, the support wheels 100 are pivoted from the folded-in position 118 to the unfolded position 120, the receptacle 94 is pivoted from the transport position 108 to the loading position 110, the wheels 18 are pivoted from the first unfolded position 78 to the second unfolded position 132, and the supports 88 are pivoted from the unfolded position 92 to the folded-back position. In addition, the second toggle lever 165 is extended.

[0114] In Fig. 36The transformation, in particular the transfer, from the first operating mode 86 to the second operating mode 126 is described in more detail. The first actuating element 22 can be arranged in a locking position 217, a free-rotation position 215, and a coupling position 219. In the locking position 217, the first actuating element 22 is not actuated. In the free-rotation position 215, the first actuating element 22 is transferred by pressing the actuating element 22 in. The first actuating element 22 is transferred to the coupling position 219 by laterally displacing the actuating element 22.

[0115] As previously described, the handle 20 is pivotally mounted on the base assembly 14 via a coupling mechanism 192 about the pivot axis 194, which runs parallel to the x-direction. The coupling mechanism 192 is coupled to the actuating element 22. The coupling mechanism 192 is, as described below with reference to Fig. 39 to 41explained, into a locked state 216 in which the handle 20 cannot be pivoted relative to the base assembly 14, a coupled state 218 in which the handle 20 can be pivoted relative to the base assembly 14 and a pivoting movement of the handle 20 can be transmitted, and a free-rotating state 214 in which the handle 20 can be pivoted relative to the base assembly 14 and a pivoting movement of the handle 20 cannot be transmitted. The coupling mechanism 192 assumes the locked state 216 when the first actuating element 22 is brought into the locked position 217. The coupling mechanism 192 assumes the coupled state 218 when the first actuating element 22 is brought into the coupled position 219. The coupling mechanism 192 assumes the free-rotation state 214 when the first actuating element 22 is moved into the free-rotation position 215. Preferably, the coupling mechanism 192 is preloaded in the locking position 216.

[0116] When transferring the transport carriage 10 from the first operating mode 86 to the second operating mode 126, first, as shown in views (B) and (C) of the Fig. 36 is shown, the first actuating element 22 is moved from the locking position 217 into the free-rotation position 215 so that the handle 20 can be pivoted about the pivot axis 194, for example into the first pivot position 188. Then, as shown in view (D) of the Fig. 36As shown, the first actuating element 22 is moved into the coupling position 219 so that the pivoting movement can be transmitted and used to transform the transport carriage 10. The handle 20 is then moved one or more times from the first pivot position 188 to the second pivot position 190 or between the first and second pivot positions 188, 190 in order to transfer the transport carriage 10 from the first operating mode 86 to the second operating mode 126. Finally, the actuating element 22 is moved into the locking position 217 so that the handle 20 can no longer be pivoted.

[0117] In Fig. 37 It is shown how the transport carriage is transferred from the second operating mode 126 to the first operating mode 86. First, as shown in view (D), the Figure 37As described above, the actuating element 22 is transferred or brought from the locking position 217 into the coupling position 219, whereby a pivoting movement of the handle 20 can be transmitted via the coupling mechanism 192. The handle 20 is then moved one or more times from the first pivot position 188 to the second pivot position 190 or between the first and second pivot positions 188, 190. In doing so, the support wheels 100 are pivoted from the unfolded position 120 to the folded position 118, the receptacle 94 is pivoted from the loading position 110 to the transport position 108, the wheels 18 are pivoted from the second unfolded position 132 to the first unfolded position 78, and the supports 88 are pivoted from the folded-back position 134 to the unfolded position 92. In addition, the second toggle lever 165 is bent.Thereafter, as shown in views (B) and (C), the actuating element 22 is moved into the free-rotation position 215 so that the handle 20 can be pivoted into the extended position 106. Finally, the actuating element 22 is moved into the locking position 217 so that the handle 20 can no longer be pivoted.

[0118] The handle 20 may further comprise a locking device which holds the first actuating element 22 in the coupling position 219 or the coupling mechanism in the coupling state until the first operating mode 86 or the second operating mode 126 is reached when the transport carriage 10 is transferred.

[0119] In Fig. 38 It is shown again how the handle height of the handle 20 can be adjusted when the trolley 10 is arranged in the second operating mode. To do this, first, as shown in views (B) and (C) of the Fig. 38As shown, the first actuating element 22 is moved from the locking position 217 to the free-rotation position 219 so that the handle 20 can be pivoted relative to the base assembly 14 about the pivot axis 194 in order to adjust the desired handle height. Since the pivot axis 194 runs parallel to the x-direction, the pivot axis 194 is a horizontal axis. The handle height can thus be adjusted by pivoting the handle 20 about the pivot axis 194. Finally, the actuating element 22 is moved into the locking position 217 so that the handle 20 can no longer be pivoted.

[0120] In the Figures 39 to 41 The coupling mechanism 192 of the transport carriage 10 is shown in detail. The base assembly 14 has such a coupling mechanism on each side at the top end of each drawer 186.

[0121] The actuating element 22 is coupled to the coupling mechanism 192 via a first cable 198 and a second cable 212. The first cable 198 is tensioned when the actuating element 22 is moved into the free-rotation position 215. The second cable 212 is tensioned when the actuating element 22 is moved into the coupling position 219.

[0122] The coupling mechanism 192 has a base body 195. The base body 195 is firmly or rigidly connected to a lower end of the handle extension 184 of the handle 20. The base body 195 is rotatably mounted in the base assembly 14 about the pivot axis 194. The base body 195 has first projections 200 on a first side and second projections 204 on a second side. The first side and the second side are arranged opposite one another in the x-direction. The first projections 200 and the second projections 204 are each distributed symmetrically about the pivot axis 194.

[0123] The base assembly 15 has a locking element 209. The locking element 209 is arranged on one side of the base body 195 in an axial direction of the pivot axis 194. The locking element 209 is rigidly connected to the base assembly. The locking element 209 has first recesses 202, which are complementary to the first projections 200. The projections 200 are thus arranged on the side of the base body 195 facing the locking element 209. The first recesses 202 are also distributed symmetrically around the pivot axis 194. In particular, all first projections 200 are identically shaped, with each first recess 202 having a profile complementary to the first projections 200.

[0124] The coupling mechanism 192 can be coupled to an actuating element 197 of an actuating device 199, which is also rotatably mounted in the base assembly 14 about the pivot axis 194. The actuating element 197 is arranged in the axial direction of the pivot axis 194 on a side of the base body 195 opposite the locking element 209. In other words, the base body 195 is arranged between the actuating element 197 and the locking element 209 in the axial direction of the pivot axis 194.

[0125] The actuating element 197 has second recesses 206 that are complementary to the second projections 204. The second recesses 206 are also distributed symmetrically around the pivot axis 194. In particular, all second projections 204 are identically shaped, with each second recess 206 having a profile complementary to the second projections 204.

[0126] The coupling mechanism 192 further includes a first profiled disc 196. The first profiled disc 196 is arranged coaxially with the pivot axis 194. The first cable 198 is coupled to the first profiled disc 196, so that a pulling movement of the cable 198 is transmitted to a rotational movement of the profiled disc 196 about the pivot axis 194.

[0127] The coupling mechanism 192 further includes a second profiled disc 210. The second profiled disc 210 is arranged coaxially with the pivot axis 194. The second cable 212 is coupled to the second profiled disc 210, so that a pulling movement of the cable 212 is transmitted to a rotational movement of the profiled disc 210 about the pivot axis 194.

[0128] The first and second profile discs 196, 210 can each be pretensioned by a respective spring device against the pulling direction of the cables 198, 212.

[0129] The first profile disc 196 and the second profile disc 210 are arranged in the base body. In other words, the base body 195 surrounds the profile discs 196, 210. The profile discs 196, 210 are rotatable relative to the base body 195 about the pivot axis 194. The first profile disc 196, the second profile disc 210, and the base body 195 are coupled to one another parallel to the pivot axis, preferably in a form-fitting manner, so that the first profile disc 196, the second profile disc 210, and the base body 195 are jointly movable parallel to the pivot axis 194.

[0130] The first and second profiled discs 196, 210 are spaced apart from one another in the direction of the pivot axis 194, in particular arranged side by side. In particular, the first profiled disc 196 is arranged closer to the first recesses 202 than the second profiled disc 210, and the second profiled disc 210 is accordingly arranged closer to the second recesses 206 than the first profiled disc 196.

[0131] The coupling mechanism 192 further comprises a sleeve 203 arranged coaxially with the pivot axis 194. The sleeve 203 is arranged in the base body 195. In other words, the base body 195 surrounds the sleeve 203. The two profiled discs 196, 210 are arranged between the base body 195 and the sleeve 203. The sleeve is arranged in the axial direction of the pivot axis 194 between the actuating element 197 and the locking element 209 and rests in the axial direction of the pivot axis 194 against both the actuating element 197 and the locking element 209, so that the sleeve 203 is supported or held in the axial direction of the pivot axis 194 by the actuating element 197 and the locking element 209.

[0132] The sleeve 203 has a projection 205. The projection 205 is arranged on the side of the sleeve 203 facing away from the handle extension 184.

[0133] An inner profile of the first profiled disc 196 facing the sleeve 203 has a first threaded portion 205. The threaded portion 205 extends in a circumferential direction around the pivot axis 194, partially along the inner profile of the first profiled disc 196. The threaded portion 205 has a pitch in the axial direction of the pivot axis 194. In other words, the threaded portion 205 is designed as a circumferential ramp having a pitch in the axial direction of the pivot axis 194. The threaded portion 205 rests on one side of the projection 203 in the axial direction of the pivot axis 194. Upon rotation of the first profiled disc 196 about the pivot axis 194 relative to the sleeve 203, the threaded portion 205 is guided along the projection 203, such that the first profiled disc 196 is moved in the axial direction of the pivot axis 194.

[0134] An inner profile of the second profiled disc 210 facing the sleeve 203 has a second threaded portion 207. The threaded portion 207 extends in a circumferential direction around the pivot axis 194, partially along the inner profile of the second profiled disc 210. The threaded portion 207 has a pitch in the axial direction of the pivot axis 194. In other words, the threaded portion 207 is designed as a circumferential ramp having a pitch in the axial direction of the pivot axis 194. The second threaded portion 207 rests in the axial direction of the pivot axis 194 on a side of the projection 203 opposite the first threaded portion 205. When the second profiled disc 210 rotates about the pivot axis 194 relative to the sleeve 203, the threaded portion 205 is guided along the projection 203, so that the second profiled disc 210 is moved in the axial direction of the pivot axis 194.

[0135] The pitches of the threaded sections 205, 207 run in the same direction, in particular with the same sign. This ensures that a rotation of one of the profiled discs 196, 210 relative to the sleeve 203 displaces the corresponding profiled disc 196, 210 in the axial direction of the pivot axis 194. Due to the axial coupling of the profiled discs 196, 210 to the base body 195, the base body 195 is also displaced in the axial direction of the pivot axis 194.

[0136] The pitch of each threaded section 205, 207 is selected such that upon a pulling movement of the corresponding cable pull 198, 212, the base body is displaced in the axial direction of the pivot axis 194 from the locking element 209 in the direction of the actuating element 197.

[0137] The pitch of the threaded portion 207 is greater than the pitch of the threaded portion 205. As a result, by rotating the second profiled disc 210 about the pivot axis 194, the base body 195 is displaced further in the axial direction of the pivot axis 194 in the direction of the actuating element 197 than by rotating the first profiled disc 196 about the pivot axis 194.

[0138] The base body 195 is pre-tensioned in the locking state 216 by a spring device. The locking state 216 is in Fig. 40shown. In the locking state 216, the first projections 200 of the base body 195 are engaged with the first recesses 202 of the locking element 209 of the base assembly 14, wherein the second projections 204 of the base body 195 are disengaged from the second recesses 206 of the actuating element 197. The base body 195 and in particular also the handle 20 are thereby coupled to one another in a rotationally fixed manner with respect to the pivot axis 194, so that the handle 20 cannot be pivoted about the pivot axis 194 relative to the base assembly 14.

[0139] To transfer the base body 195 from the locked state 216 to the free-rotation state 214, the first actuating element 22 is transferred from the locked position 217 to the free-rotation position 215. In doing so, the first cable 198 is pulled, causing the profiled disc 196 to rotate. The profiled disc 196 and the base body 195 are pushed by the locking element 209 toward the actuating element 197, so that both the first projections 200 are disengaged from the first recesses 202 and the second projections are disengaged from the second recesses 206.

[0140] In Fig. 39the base body 195 is arranged in the free-rotation state 214. In the free-rotation state 214, the first projections 200 of the base body 195 are disengaged from the first recesses 202 of the locking element 209 of the base assembly 14, and the second projections 204 of the base body 195 are also disengaged from the second recesses 206 of the actuating element 197. The base body 195 and, in particular, also the handle 20 are thereby rotatable relative to the base assembly about the pivot axis 194, so that the handle 20 cannot be pivoted about the pivot axis 194 relative to the base assembly 14.

[0141] To transfer the base body 195 from the locked state 216 or from the free-rotation state 214 to the coupling state 218, the first actuating element 22 is transferred from the locked position 217 or from the free-rotation position 215 to the coupling position 219. In doing so, the second cable 212 is pulled, thereby rotating the profiled disc 210. The profiled disc 210 and the base body 195 are pushed by the locking element 209 in the direction of the actuating element 197, so that both the first projections 200 are disengaged from the first recesses 202 and the second projections are engaged with the second recesses 206.

[0142] In Fig. 41the base body 195 is arranged in the coupling state 218. In the coupling state 218, the first projections 200 of the base body 195 are disengaged from the first recesses 202 of the locking element 209 of the base assembly 14. Instead, the second projections 204 of the base body 195 are engaged with the second recesses 206 of the actuating element 197. The base body 195 and in particular also the handle 20 are thereby rotatable with respect to the pivot axis 194 relative to the base assembly, so that the handle 20 cannot be pivoted about the pivot axis 194 relative to the base assembly 14. In addition, the base body 195 and the actuating element 197 are coupled to one another in a rotationally fixed manner with respect to the pivot axis 194, so that a pivoting movement of the handle 20 about the pivot axis 194 is transmitted to the actuating element 197.

[0143] The locking device arranged in the handle 20 can be designed to clamp the cable 212 such that the coupling mechanism 192 is held in the coupling state 219 until the first operating mode 86 or the second operating mode 126 is reached when the transport trolley 10 is transferred. The locking device is activated when the first actuating element 22 is transferred into the coupling position 219. Such a locking device 290 and a corresponding unlocking device 280 for unlocking the locking device 290 are described with reference to Fig. 49 and 50 be described in more detail.

[0144] The actuating element 197 is coupled to one end of a cable 208 of the actuating device 199, so that the cable 208 is pulled or tensioned by a rotational movement of the actuating element 197 in one direction of rotation about the rotation axis 194. The cable 208 is pulled in a first direction of movement. The other end of the cable 208 is coupled to a spring device that is tensioned when the cable 208 is pulled in the first direction of movement. If the actuating element 197 is rotated in the opposite direction of rotation, the cable 208 is released and pulled against the first direction of movement by the restoring force of the spring device. The cable 208 is thus moved either in or against the first direction of movement, depending on the direction of rotation of the actuating element 197.

[0145] As previously described, a coupling mechanism 192 is arranged on each side of the base assembly 14, which couples to the respective handle extension 184 of the handle 20. Each coupling mechanism 192 is thus connected to a corresponding cable 208. The two coupling mechanisms 192 are identically designed, so that the two cables 208 are moved equally when the handle 20 is pivoted relative to the base assembly. They can be brought together in the base assembly 14 via a coupling element. This is described, for example, with reference to Fig. 43 described in more detail below.

[0146] The cable pulls 208 are jointly coupled to a movement conversion device 264, which is described below with reference to the Figures 42 to 51 is described in detail.

[0147] The actuating device 199 further includes the motion conversion device 264. The motion conversion device 264 is configured to convert a movement of each cable pull 208 in the first direction of movement into a second movement, by means of which the transformation between the first operating mode 86 and the second operating mode 126 takes place. The second movement thus drives the pivoting movements of the support wheels 100 and the first receptacle 93.

[0148] Furthermore, the actuating device 199 may comprise a translation device 220. Embodiments of a translation device 220 are described, for example, in the Figures 42 and 43shown. The transmission device 220 is coupled to the cable pulls 208 and, depending on the transmission ratio, converts a movement of the cable pulls into rotary movements of varying strengths. The transmission ratio is determined by the force with which the cable pull 208 is pulled. In other words, the transmission device is designed to provide a corresponding transmission ratio depending on the force with which the cable pulls 208 are pulled. The force to be applied depends, for example, on the weight of a transport box arranged in the first receptacle 93. The heavier the weight of the transport box, the greater the load that acts on the cable pull 208 when transferring the first receptacle 93 between the transport position 108 and the loading position 110. The tensile force with which the cable pull 208 must be pulled also increases accordingly.

[0149] Furthermore, the actuating device 199 can have a freewheel device. The freewheel device can be arranged, for example, between the transmission device 220 and the movement conversion device 264. The freewheel device can be configured to transmit a rotational movement of the transmission device 220 corresponding to the first movement direction to the movement conversion device 264 and not to transmit a rotational movement of the transmission device 220 counter to the first movement direction to the movement conversion device 264.

[0150] Alternatively, the movement conversion device 264 can also be coupled directly to the cable pull 208 via a freewheel device, wherein the freewheel device only transmits the movement of the cable pull 208 in the first direction of movement to the movement conversion device 264 and does not transmit the movement of the cable pull 208 opposite to the first direction of movement to the movement conversion device 264.

[0151] Fig. 42shows various views of a first embodiment of a transmission device 220. View (A) shows an exploded view of the transmission device 220, view (B) an isometric view of the transmission device 220, view (C) a side view of the transmission device 220, view (D) a top view of the transmission device 220, view (E) a detailed view of a disc 242 of the transmission device 220 and view (F) a detailed view of view (D), in which the discs 238, 240, 242 of the transmission device 220 are shown enlarged.

[0152] The transmission device 220 has a cable 222. The cable 222 is attached to a first side of a coupling element 224. The cable 222 is preferably coupled to the cable 208. For this purpose, the cable 222 can be connected to the cable 208, for example, via another coupling element.

[0153] The transmission device 220 further includes a first traction cable 226, a second traction cable 228, and a third traction cable 230. A first end of each traction cable 226, 228, 230 is attached to a second side of the coupling element 224.

[0154] The transmission device 220 further includes a first deflection pulley 232, a second deflection pulley 234, and a third deflection pulley 236. The deflection pulleys 232, 234, and 236 are identically constructed, have a common axis of rotation, and are arranged next to one another in the direction of the axis of rotation. The first traction cable 226 is deflected around the first deflection pulley 232, the second traction cable 228 is deflected around the second deflection pulley 234, and the third traction cable 230 is deflected around the third deflection pulley 236. The three traction cables 226, 228, and 230 run parallel to one another up to the deflection pulleys 232, 234, and 236.

[0155] The transmission device 220 further includes a first disk 238, a second disk 240, and a third disk 242. The first disk 238 has a larger diameter than the second disk 240. The second disk 240 has a larger diameter than the third disk 242. The three disks 238, 240, and 242 share a common axis of rotation and are arranged side by side in the direction of the axis of rotation. The three disks are rotatably mounted on an axle 244.

[0156] The first pulley 226 is coupled to the first pulley 238. The second pulley 228 is coupled to the second pulley 240. The third pulley 230 is coupled to the third pulley 242. The three pulleys 226, 228, 230 run along the circumference of the respective pulley 238, 240, 242. A second end of the first pulley 226 is attached to the first pulley 238. A second end of the second pulley 228 is attached to the second pulley 240. The three pulleys 226, 228, 230 are coupled to the respective pulley 238, 240, 242 such that a pulling movement of one pulley is transferred to a rotational movement of the corresponding pulley. Since the traction cables 226, 228, 230 are pulled together due to the coupling by means of the coupling element 224 and the disks 238, 240, 242 each have different diameters, the disks 238, 240, 242 are rotated by different angles of rotation during a joint pulling movement of the traction cables 226, 228, 230.In particular, the angle of rotation of the first disc 238 is smaller than the angle of rotation of the second disc 240 and the angle of rotation of the second disc 240 is smaller than the angle of rotation of the third disc 242. The first disc 238 can be coupled to the motion conversion device 264 via a freewheel device.

[0157] The first disc 238 has recesses 246 on the side facing the second disc 240, which are arranged distributed in the circumferential direction. The second disc 240 has projections 248 on the side facing the first disc 238, which are arranged and shaped complementarily to the recesses 246. The recesses 246 and the projections 248 can be brought into engagement with one another.

[0158] The second disc 240 has recesses 250 on the side facing the third disc 242, which are arranged distributed in the circumferential direction. The third disc 242 has projections 252 on the side facing the second disc 240, which are arranged and shaped complementarily to the recesses 250. The recesses 250 and the projections 252 can be brought into engagement with one another.

[0159] The transmission device 220 further comprises a spring element 256, for example a spiral spring, by means of which the three discs are pressed against one another in the direction of the axis 244, so that the projections 248 and 252 are brought into engagement with the corresponding recesses 246 and 250.

[0160] The transmission device 220 further includes another deflection pulley 254. The third traction cable 230 extends from the coupling element 224, first to the third deflection pulley 236, then to the third disc 242, from the third disc 242 to the deflection pulley 254, and from the deflection pulley 254 to a spring device (not shown). A second end of the third traction cable is connected to the spring device. A pulling movement of the third traction cable 230 directed from the second end to the first end tensions the spring device.

[0161] As shown in view (E) of the Figure 42As shown, the projections 248 and 252 each have a straight flank and a slanted flank. The straight flank and the slanted flank are arranged on opposite sides of the respective projection 248, 252 in the circumferential direction, wherein the slanted flanks are arranged upstream of the straight flank in a pulling direction of the pull cables 228, 230 from the respective second end toward the first end, in particular in the resulting direction of rotation of the respective disk.

[0162] As previously described, during a joint pulling movement of the pulleys 226, 228, 230, due to the different diameters of the pulleys 238, 240, 242, the third pulley 242 is rotated by a larger angle than the second pulley 240 and the second pulley 240 by a larger angle than the first pulley 238. Due to the coupling of the pulleys 238, 240, 242 via the corresponding projections 248, 252 and recesses 246, 250, the first and second pulleys 238, 240 are rotated by the same angle as the third pulley 242 via the third pulley, so that the first and second pulleys 226, 228 are relaxed during a rotating movement, in particular so that the first and second pulleys 226, 228 sag.

[0163] If all discs 238, 240, 242 are coupled to one another, in particular via the projections 248, 252 and recesses 246, 250, a pulling movement by the cable 222 is transmitted via the third pulling cable 230 and the third disc 242 to a rotational movement of the first disc 238. A rotational angle of the rotational movement of the first disc 238 and a pulling distance of the pulling movement of the cable 222 or the third cable 230 have a third transmission ratio. The transmission ratio indicates the ratio of the rotational angle to the pulling distance.

[0164] By forming the projections 252 with an inclined flank, it is achieved that, depending on the tensile force transmitted via the third pull cable 230, the third pulley 242 can be disengaged from the second pulley 240 against the pretensioning force of the spring element 256. As soon as the second and third pulleys 240, 242 are disengaged, the third pulley 242 is freely rotatable and the second pull cable 228 is tensioned, so that a pulling movement by the cable pull 222 is transmitted via the second pull cable 228 and the second pulley 240 to a rotary movement of the first pulley 238. A rotation angle of the rotary movement of the first pulley 238 and a pulling distance of the pulling movement of the cable pull 222 or the second cable pull 228 have a second transmission ratio that is smaller than the third transmission ratio.

[0165] By forming the projections 248 with an inclined flank, it is achieved that, depending on the tensile force transmitted via the second pulley 228 when the third pulley 242 is disengaged from the second pulley 240, the second pulley 240 can be disengaged from the first pulley 238 against the pretensioning force of the spring element 256. As soon as the first and second pulleys are disengaged, the second pulley 240 is also freely rotatable and the first pulley cable 226 is released, so that a pulling movement by the cable pull 222 is transmitted via the first pulley 226 to a rotary movement of the first pulley 238. A rotation angle of the rotary movement of the first pulley 238 and a pulling distance of the pulling movement of the cable pull 222 or the first cable pull 226 have a first transmission ratio that is smaller than the second transmission ratio.

[0166] In this way, the transmission ratio of the transmission device 220 can be automatically controlled depending on the pulling force applied to the cables.

[0167] Fig. 43 shows a second embodiment of a translation device 220' in a schematic representation. The translation device 220' is arranged in the base assembly 14, in particular in an upper part of the base assembly 14. The translation device 220' has essentially the same components as the translation device 220. Fig. 42 The difference to the translation device 220 from Fig. 42 is that the transmission device 220' has only two discs 238, 240 instead of three. In principle, any number of more than one disc can be provided, with the discs each being engageable with one another via complementarily shaped recesses and projections.

[0168] In Fig. 43 the cable pull 222 is connected to two cables 258 and 260. The cable pull 258 can, for example, correspond to the cable pull 208 of a first coupling mechanism 192 on one side of the base assembly 14 and the cable pull 260 can, for example, correspond to the cable pull 208 of a second coupling mechanism 192 on an opposite side of the base assembly 14. As in Fig. 43 As shown, one of the two cable pulls, in this case the cable pull 260, can be guided to the opposite side of the base assembly 14 by means of deflection pulleys 262.

[0169] The Figures 44 to 48 show a first embodiment of a motion conversion device 264. The motion conversion device 264 has a disc 266 and a lever 268. The disc is rotatably mounted in the base assembly 14 with respect to a rotation axis.

[0170] The disk 266 is not rotationally symmetrical with respect to the axis of rotation. Instead, the disk 266 has a radial profile that changes along a circumferential direction of the disk 266. In other words, the radius of the disk 266 changes along the circumferential direction. The radial profile is preferably oval and has an axis of symmetry. As a result, the radial profile is mirror-symmetrical. The oval radial profile intersects the axis of symmetry at a first point and a second point, wherein the first point has the smallest radius, in particular distance from the axis of rotation, and the second point has the largest radius. The two points are spaced 180° from each other around the axis of rotation. The radius increases continuously along the circumference of the disk 266 from the first point to the second point.

[0171] A first end of the lever 268 is pivotally mounted in the base assembly. The lever includes a wheel 270 rotatably mounted on the lever 268 between the first end and a second end of the lever 268. The mounting point of the wheel 270 is located closer to the first end of the lever 268 than to the second end of the lever 268.

[0172] The wheel 270 rests against the circumferential surface of the disc 266. The wheel 270 is designed to roll along the circumferential surface when the disc 266 rotates. Because the disc is oval and thus the radial profile changes along the circumferential direction, the wheel is offset in a radial direction relative to the axis of rotation of the disc 266 when the disc 266 is rotated. This causes the lever to deflect or pivot about its bearing point in the base assembly 14. In other words, an incline or decline in the radial profile of the disc 266 causes the lever to deflect when the disc rotates. As a result, the lever 268 performs a pendulum or oscillating movement when the disc 266 is rotated.

[0173] The second end of the lever 268 is connected to a first end of a cable 276. A second end of the cable 276 is coupled to a spring element. Depending on the deflection of the lever 268, the cable 276 is pulled or tensioned in a second direction of movement or relaxed counter to the second direction of movement. When the cable 276 is tensioned, the spring element is also tensioned. When the cable 276 is relaxed, the cable 276 is pulled counter to the second direction of movement due to the restoring force of the spring element. In other words, the pendulum movement of the lever 268 causes the cable 276 to be moved alternately in and counter to the second direction of movement.

[0174] The disc 266 further includes a crescent-shaped protrusion 272 on one side of the axis of symmetry, which also has the same radial profile on this side of the axis of symmetry. The lever 268 further includes a braking protrusion 274. The braking protrusion 274 extends from the bearing point of the wheel 270 toward the disc 266. The braking protrusion 274 is preferably semicircular and extends the same distance toward the disc 266 as the wheel 270. When the wheel rests on the side of the disc on which the crescent-shaped protrusion 272 is located, the braking protrusion 274 rests against the protrusion 272 and thus brakes the rolling of the wheel 270.

[0175] The disc 266 is connected to the transmission device 220' via a freewheel device, so that the disc is driven in only one direction of rotation. In other words, a rotational movement of the actuating element 197 in the first direction of movement is transmitted to the disc 266 via the cable 208, the transmission device 220', and the freewheel device, whereas a rotational movement of the actuating element 197 opposite to the first direction of movement is not transmitted to the disc 266 due to the freewheeling of the freewheel device.

[0176] In Fig. 44 The disc 266 is arranged in a first rotational position 286. In the first rotational position 286, the wheel 270 is arranged at the first point of the radial profile of the disc 266. The lever 268 is arranged in a first end position 287. The transport carriage is arranged in the first operating mode 86 when the disc 266 is arranged in the first rotational position 286.

[0177] In the Fig. 45 and 46 It is shown that the disc 266 is rotated in the direction of rotation from the first rotational position 286 to a second rotational position 288. The lever 268 is moved from the first end position 287 to a second end position 289, with the cable pull 276 being pulled in the second direction of movement. During this movement, the transport carriage 10 is transferred from the first operating mode 86 to the second operating mode 126, with the support wheels and the first receptacle 9 being unfolded.

[0178] In Fig. 46 The disc 266 is arranged in the second rotational position 288. In the second rotational position 288, the wheel 270 is arranged at the second point of the radial profile of the disc 266. The lever 268 is arranged in the second end position 289. The transport carriage is arranged in the second operating mode 126 when the disc 266 is arranged in the second rotational position 288.

[0179] In the Figures 47 and 48It is shown that the disk 266 is rotated in the direction of rotation from the second rotational position 288 to the first rotational position 286. The lever 268 is moved from the second end position 289 to the first end position 287, with the cable pull 276 being pulled counter to the second direction of movement. During this movement, the transport trolley 10 is transferred from the second operating mode 126 to the first operating mode 86, with the support wheels and the first receptacle 94 being folded in. When the disk 266 rotates from the second rotational position 288 to the first rotational position 286, the braking projection 274 rests against the elevation 272 to brake the rotational movement. Due to the weight of a transport box in the first receptacle 93, a tensile force can be exerted on the cable pull 276, which can be transferred to the disk 266 via the lever 268 and the wheel 270. To avoid this, the braking projection 274 and the elevation 272 are provided.In the second rotational position 288, the braking projection 274 and the elevation 272 hold the disc 266 in the second rotational position 288 due to static friction, thus ensuring that the transport trolley is not automatically transferred from the second operating position 126 to the first operating position 86 due to the weight of a transport box. During rotation from the second rotational position 288 to the first rotational position 286, the braking projection 274 and the elevation 272 brake the rotational movement due to sliding friction, so that the rotational movement is not accelerated due to the weight of a transport box.

[0180] In Fig. 48 the disc 266 is again in the first rotational position 286, the lever 268 is in the first end position 287 and the transport carriage 10 is in the first operating mode 86.

[0181] The movement conversion device 264 further comprises a first and a second pin 278', 278". The two pins 278', 278" are also spaced apart from each other by 180° in the circumferential direction. The pins 278', 278" cooperate with an unlocking device 280 which is arranged in the Figures 49 and 50 is presented in detail.

[0182] The unlocking device 280 is configured to automatically return the first actuating element 22 to the locking position 217 when the turntable 266 reaches the first rotational position 286 or the second rotational position 288, respectively, with the transport carriage arranged in the first operating mode 86 or the second operating mode 126. To this end, the unlocking device 280 releases a corresponding lock of the locking device 290.

[0183] As previously described, the locking device 290 holds the coupling mechanism 192 in the coupling state 219, for example, by clamping the cable 212. The unlocking device 280 releases this locking when the turntable 266 reaches the first rotational position 286 or the second rotational position 288, in particular when the transport carriage 10 reaches the first operating mode 86 or the second operating mode 126.

[0184] For this purpose, the unlocking device 280 has a flap 282 that can be moved by means of the pins 278 when one of the pins 278 is pressed or rotated against the flap 282. The flap 282 rests against a rod 292. The rod 292 is coaxially aligned with the pivot axis 194 of the coupling mechanism 192. The flap 282 is coupled to the rod 292 such that when the flap 282 is pushed sideways by a pin, the flap 282 displaces the rod 292 parallel to the pivot axis 194 in the direction of the coupling mechanism 192. The rod 292 is coupled to a spring element. In a rest position of the spring element, the flap 282 is not deflected by one of the pins 278 and the rod 292 is accordingly not displaced in the direction of the coupling mechanism 192. The spring element thus causes the flap 282 to be pre-tensioned into a non-deflected position. Figures 49 and 50the flap 282 is arranged in the undeflected position.

[0185] An unlocking element 302 is arranged in the handle extension 184 of the handle 20. The unlocking element 302 extends parallel to a direction of extension of the handle extension 184 in the direction of the handle bar 182 and is arranged to be movable in this direction of extension in the handle extension 184.

[0186] The rod 292 is coupled to the unlocking element 302 via a first deflection element 294 and a second deflection element 300. The rod 292 rests on the first deflection element 294. The first deflection element 294 is movable parallel to the pivot axis 194. The rod can thus displace the first deflection element 294 parallel to the pivot axis 194. On the side of the first deflection element 294 opposite the rod 292, a spring element 304 is arranged, which presses the first deflection element 294 against the rod 292. The second deflection element 300 rests on the unlocking element 302. The second deflection element 300 is arranged perpendicular to the pivot axis 194 and parallel to the direction of extension of the handle extension 184. The second deflection element 300 can thus move the unlocking element parallel to the direction of extension of the handle extension 184.The unlocking element 302 can also be pretensioned against the second deflection element 300 by means of a spring element.

[0187] The first deflection element 294 has a first inclined flank 296, and the second deflection element 300 has a second inclined flank 298. The first inclined flank 296 and the second inclined flank 298 are shaped to complement each other. The two deflection elements 294, 300 are coupled to each other via the inclined flanks 296, 298. This is referred to in particular as an inclined flank coupling. When the first deflection element 294 is displaced along the pivot axis, the second deflection element 300 is displaced perpendicular to the pivot axis 194, in particular parallel to the direction of extension of the handle extension 184.

[0188] The unlocking element 302 is coupled to the locking device 290 in such a way that the clamping of the locking device 290 is released by the displacement of the unlocking element 302.

[0189] If the turntable now reaches the first or second rotational position 286 or 288, the corresponding pin 278 pushes the flap to the side and thus displaces the rod 292 parallel to the pivot axis 194 in the direction of the first deflection element 294. The first deflection element 294 is also displaced, so that the second deflection element 300 is pushed via the inclined flank coupling in the direction of the unlocking element 302. The unlocking element 302 is also displaced, so that the clamping of the locking device 290 is released. As a result, the cable pull 212 is released again, and the first actuating element 22 is moved back into the free-rotation position 215 or the locking position 217, so that the coupling mechanism 192 is no longer arranged in the coupled state 218.

[0190] Fig. 51shows a second embodiment of a motion conversion device 264'. The motion conversion device 264' basically has the same structure as the motion conversion device 264. The difference lies in the different design of the lever 268 and the disc 266. In particular, the braking projection 274' of the lever 268' is not semicircular but angular. Furthermore, the braking projection 274' extends further in the direction of the disc 266' than the wheel 270'. The elevation 272' has a radial profile that is similar to the disc 266', wherein the elevation is offset inwardly with respect to the axis of rotation by the same length that the braking projection 274' extends further in the direction of the disc 266' than the wheel 270'.

[0191] In the Figures 52 to 54Using the example of one of the side assemblies 16, a mechanism is shown by which each first receiving element 94 of the first receptacle 93 can be moved between the transport position 108 and the loading position 110. This mechanism is designed identically in both side assemblies.

[0192] In this mechanism, the arm 96 is rotatably mounted on the corresponding side assembly 16 via a roller 306 so that the corresponding receiving element 94 can be moved between the transport position 108 and the loading position 110.

[0193] A cable 308 is coupled to the pulley 306. For this purpose, a first end of the cable 308 is attached to the pulley 306, so that a pulling movement toward a second end of the cable 308 rotates the pulley 306 about its axis of rotation. The second end of the cable 308 is coupled to the cable 276 of the motion conversion device 264 such that a movement of the cable 276 in the second direction of movement is transmitted to the cable 308. The cable 308 preferably extends from the side assembly 16 into the base assembly 14.

[0194] The roller 306 can also be coupled to a spring device that is tensioned when the cable 308 is pulled towards the second end, in particular in the second direction of movement. If the cable 276 is moved in the second direction of movement by means of the lever 268, the cable 308 is also pulled in the second direction of movement. As a result, the arm 96 is pivoted from the transport position 108 towards the loading position 110 and the spring device is tensioned. If the cable 276 is moved counter to the second direction of movement by means of the lever 268, the cable 308 is released again, whereby the restoring force of the spring device causes the cable 308, and thus also the cable 276, to be pulled counter to the second direction of movement.

[0195] The receiving element 94 is rotatably mounted on the arm 96 by means of a roller 310. The arm 96 further comprises a circumferential cable or belt 312 that encircles the roller 306 and the roller 310. The rollers 306 and 310 have the same circumference. This ensures that, when the arm 96 is pivoted, the receiving element 94 always has the same orientation in space, particularly with respect to the vertical direction.

[0196] In Fig. 52 The transport carriage 10 is arranged in the first operating mode 86. The first receiving element 94 is thus arranged in the transport position 108. The disc 266 is arranged in the first rotational position 286.

[0197] To transfer the transport carriage 10 from the first operating mode 86 to the second operating mode 126, as previously described, the cable pull 308 is pulled in the second direction of movement. This rotates the roller 306 in one direction about the axis of rotation, causing the arm 96 to pivot upwards above the roller 306. This changes the vertical position of the receiving element 94, while the orientation of the receiving element 94 remains unchanged. Fig. 53 For example, the transport carriage 10 is in a state between the first operating mode 86 and the second operating mode 126. The first receptacle 93 is arranged between the transport position 108 and the loading position 110.

[0198] The receiving element 94 is pivoted upwards until it reaches the loading position 110. The loading position 110 is reached when the disk 266 is arranged in the second rotational position 288. This state is shown in Fig. 54shown. In Figure 54 The transport carriage 10 is thus arranged in the second operating mode 126.

[0199] To transfer the transport carriage 10 from the second operating mode 126 to the first operating mode 86, as previously described, the cable pull 308 is moved counter to the second direction of movement. This rotates the roller 306 about the axis of rotation in an opposite direction of rotation, causing the arm 96 to pivot downward above the roller 306. This changes the vertical position of the receiving element 94, while the orientation of the receiving element 94 remains the same. The receiving element 94 is pivoted downward until it reaches the transport position 108. The transport position 108 is reached when the disk 266 is arranged in the first rotation position 286. The transport carriage is then arranged again in the first operating mode 86.

[0200] As previously described, a movement of the first receptacle 93 is coupled with a movement of the support wheels 100. This coupling is shown in the Figures 55 to 57 described in detail.

[0201] For this purpose, the roller 306 has a slotted guide 314. The slotted guide 314 has a first, straight section 316, which runs eccentrically from the radial inside to the radial outside with respect to the axis of rotation. The slotted guide has a second, curved section 318, which adjoins the first section 316. The second section 318 extends along the circumference of the roller 306, with a radial distance of the slotted guide 314 along the second section 318 steadily increasing, starting from the first section 316. The radial pitch of the slotted guide 314 is greater in the first section 316 than in the second section 318.

[0202] A lever 320 is arranged on the side assembly 16. A first end of the lever 320 is pivotally mounted on the side assembly about a pivot axis. The pivot axis runs parallel to the rotational axis of the roller 306. The pivot axis is arranged above the rotational axis of the roller 306 in the y-direction. A wheel 322 is rotatably mounted on a second end of the lever 320. The wheel rests against the slotted guide 314 and can roll along the slotted guide 314 when the roller 306 is rotated.

[0203] The lever 320 is bent. To this end, the lever 320 has a first straight section 324 and a second straight section 326, which are arranged at an angle to one another. The first end of the lever 320 is arranged on the first section 324, and the second end of the lever 320 is arranged on the second section 326. The lever 320 is coupled to another cable 328. The cable 328 is attached to the second section 326 of the lever 320. A movement of the cable 328 causes the support wheels to be folded out or folded in.

[0204] In Fig. 55the transport carriage 10 is arranged in the first operating mode 86, with the first receptacle 93 correspondingly arranged in the transport position 108. The wheel 322 rests against the first section of the link guide 314. When the transport carriage 10 is transferred from the first operating mode 86 to the second operating mode 126, the roller 306 is rotated about the axis of rotation, as previously described. As a result, the link guide 314 is also rotated about this axis of rotation, with the wheel 322 rolling along the link profile of the link guide 314. The wheel 322 first rolls along the first section 316 until the wheel 322 reaches the second section 318.

[0205] This condition is in Fig. 56The wheel is arranged at the beginning of the second section 318. The transport carriage 10 is in a state between the first operating mode 86 and the second operating mode 126, and the first receptacle 93 is arranged between the transport position 108 and the loading position 110.

[0206] The roller 306 continues to rotate as described above until the second operating mode 126 is reached. In doing so, the wheel rolls along the second section 318. When the second operating mode 126 is reached, the wheel 322 is arranged at one end of the second section 318. This state is shown in Fig. 57 shown.

[0207] Since a radial distance of the slotted guide 314 with respect to the axis of rotation of the roller 306 along the slotted guide 314 increases continuously from the beginning of the first section 316 to an end of the second section 318, a radial distance of the wheel 322 from the axis of rotation of the roller 306 also changes. This deflects the lever 320, causing the lever 320 to pull on the cable 328. Due to the different radial gradients in the first section 316 and the second section 318, the lever is deflected further when the wheel 322 moves along the first section 316 than when the wheel 322 moves along the second section 318. The ratio of the deflections corresponding to the two sections is preferably 1:2 to 1:10, in particular 1:5.

[0208] In the Figures 58 and 59 a mechanism is shown by means of which the support wheel 100 can be folded out or in from a side assembly 16. In Fig. 58 the support wheel 100 is arranged in the folded position 118, the wheel 18 in the unfolded position 78 and the support 88 in the unfolded position 92. Accordingly, the transport trolley 10 is arranged in the first operating mode 86. In Fig. 58 the support wheel 100 is arranged in the unfolded position 120, the wheel 18 in the second unfolded position 132 and the support 88 in the folded-back position 134. Accordingly, the transport trolley 10 is arranged in the second operating mode 126. The individual components arranged in the side assembly 16 have already been described with reference to the Figures 28 to 32 explained.

[0209] In the Figures 58 and 59It is also shown that the roller 164 is coupled to the cable 328. The cable 328 is attached to the roller 164 so that the roller 164 is rotated when the cable 328 is pulled. In this way, the rotational movement of the roller 306, in particular the pivoting movement of the first receptacle, is coupled to the rotational movement of the roller 164 via the lever 320 and the cable 328. The roller 164 can further be coupled to a spring device that is tensioned when the cable 328 is pulled. If the cable 328 is released, the roller 164 is rotated back due to the restoring force of the spring device, whereby the cable 328 is pulled in the opposite direction.

[0210] Furthermore, in the Figures 58 and 59It is shown that the fourth lever element 163 of the second toggle lever 165 is coupled to the arm 122 of the support wheel 100. For this purpose, the arm 122 is rotatably coupled to the fourth lever element 163 on the side of the fourth lever element 163 facing away from the third lever element 162. The arm 122 of the support wheel 100 is also rotatably mounted on the axis 166. A bending or stretching movement of the toggle lever 165 thus leads to a pivoting movement of the arm 122 about the pivot axis 166. The third lever element 162 is straight. The fourth lever element 163 is curved. Preferably, a radius of curvature of the fourth lever element 163 is greater than, in particular twice as large as, a length of the fourth lever element 163 from the third lever element 162 to the arm 122. Preferably, a length of the third lever element 162 from the roller 164 to the fourth lever element 163 is longer than, in particular twice as long as, the length of the fourth lever element 163.

[0211] In Fig. 58 In particular, in the first operating mode 86, the toggle lever 165 is arranged in a bent position. In other words, the first lever element 148 and the second lever element 150 form an angle with each other that is less than 145°. The angle is preferably 60° to 120°, in particular 90°.

[0212] In Fig. 59 In particular, in the second operating mode, the toggle lever 165 is arranged in an extended position. In other words, the first lever element 148 and the second lever element 150 form an angle of 180° with one another. The first lever element 148 and the second lever element 150 are thus arranged in alignment with one another.

[0213] In the Figures 60 to 62shows how the individual components of the side assembly 16 interact to pivot the support wheel from the folded position 118 to the unfolded position 120 and, at the same time, to pivot the wheel 18 from the first unfolded position 78 to the second unfolded position 132 and the support 88 from the unfolded position 92 to the folded-back position 134.

[0214] When transferring the transport carriage 10 from the first operating mode 86 to the second operating mode 126, the cable pull 328 is moved in the direction of the Fig. 30 The pulley 164 is thereby rotated about its axis of rotation, and thus the third lever element 162 is also pivoted about this axis of rotation. In this process, the second toggle lever 165 is gradually extended. In other words, the angle formed by the third lever element 162 and the fourth lever element 163 increases the more the cable 328 is pulled.

[0215] When the second toggle lever 165 is extended, the arm 122 of the support wheel 100 pivots about the pivot axis 166 from the folded position 118 toward the unfolded position 120. Since the cup curve 160 is rigidly connected to the third lever element 162, the cup curve 160 is also pivoted about the rotation axis of the roller 164. The wheel 158 rolls along the inner profile of the cup curve 160.

[0216] The inner profile of the cup curve 160 has a first section 330 and a second section 332. In the first operating state 86, the wheel 158 rests at the beginning of the first section 330, and in the second operating mode 126, the wheel 158 rests at the end of the second section 332. The end of the first section 330 and the beginning of the second section 332 are adjacent to one another. The wheel 158 thus rolls along the inner profile of the cup curve 160 from the beginning of the first section 330 to the end of the second section 332.

[0217] The first section 330 is designed such that when the cup cam 160 pivots, the wheel 158 rolls along the inner profile of the cup cam without changing its position. In other words, a radial distance of the inner profile from the axis of rotation of the roller 164 remains constant along the first section 330. The second section 332 is designed such that when the cup cam 160 pivots, the wheel 158 rolls along the inner profile of the cup cam and, in the process, changes its position. In other words, a radial distance of the inner profile from the axis of rotation of the roller 164 changes along the second section 330. In particular, the radial distance of the inner profile from the axis of rotation of the roller 164 becomes smaller along the second section 330. As a result, the wheel 158 and thus also the second end of the lever 156 are moved in the direction of the axis of rotation of the roller 164. The first end of the lever 156 is moved downwards, whereby the toggle lever 146 is also moved downwards.As a result, the lever 154 is pivoted further about the pivot axis 166, so that the wheel 18 is pivoted from the first unfolded position 78 to the second unfolded position. On the other hand, the cable 168 is released, so that the spring element 180 retracts the cable 168. This pivots the lever 174 in the opposite direction about the pivot axis 166, so that the support is pivoted back from the unfolded position 92 to the folded-back position.

[0218] Fig. 60 shows the initial state, in particular the first operating state 86, in which the support wheel 100 is arranged in the folded position 118, the wheel 18 in the unfolded position 78, and the support 88 in the unfolded position 92. The second toggle lever 165 is angled.

[0219] Fig. 61shows an intermediate state in which the support wheel 100 is partially unfolded, in particular arranged between the folded position 118 and the unfolded position 120, and the second toggle lever 165 is partially extended. In contrast, the wheel 18 is still in the unfolded position 78 and the support 88 is still in the unfolded position 92, since the roller 158 is arranged at the end of the first section 330 of the cup curve 160.

[0220] Fig. 62 shows the final state of the unfolding movement, in which the support wheel 100 is in the unfolded position 120, the wheel 18 is in the second unfolded position 132, and the support 88 is in the folded-back position 134. The second toggle lever 165 is completely extended.

[0221] The folding of the support wheel 100 from the unfolded position 120 into the folded position 118 also takes place in a corresponding manner, with the wheel 18 being pivoted from the second unfolded position 132 into the first unfolded position 78 and the support 88 being pivoted from the folded-back position 134 into the unfolded position 92. In this case, the cable pull 328 is moved in the opposite direction to the direction of the Fig. 30shown arrow. This causes the roller 164 to rotate about its axis of rotation in the opposite direction. This causes the second toggle lever 165 to gradually bend, whereby the arm 122 of the support wheel 100 is pivoted about the pivot axis 166 from the folded position 118 towards the unfolded position 120. Likewise, the pot curve 160 is pivoted about the axis of rotation in the opposite direction of the roller 164, so that the wheel 158 rolls from the end of the second section 332 to the beginning of the first section 330. In the process, the wheel 158 and thus also the second end of the lever 156 are moved away from the axis of rotation of the roller 164. As a result, the first end of the lever 156 moves upwards, whereby the toggle lever 146 is also moved upwards. As a result, the lever 154 is pivoted back about the pivot axis 166, so that the wheel 18 is pivoted from the second unfolded position 132 into the first unfolded position 78.On the other hand, the lever 156 pulls on the cable 168, whereby the lever 174 is pivoted about the pivot axis 166, so that the support 88 is pivoted from the folded-back position 134 into the unfolded position 92.

[0222] Fig. 63 shows an embodiment of a braking device 334. As shown in view (B), the braking device 334 is activated by actuating, for example pressing, the third actuating element 26 on the handle 20.

[0223] As shown in view (A), the braking device 334 is arranged on a wheel 18, in particular in the arm 124, of the transport carriage 10 to prevent the wheel 18 from rotating. The braking device 334 thus functions as a parking brake, which secures the transport carriage 10 against unintentional rolling.

[0224] A cable 336 runs from the third actuating element 26 to the braking device 334. The third actuating element 26 is designed to pull the cable 336 upon actuation.

[0225] The braking device 334 further includes a pin 338. A first end of the pin 338 is connected to the cable 336. The pin 338 is mounted in the arm 124 such that it is axially movable. This allows the cable 336 to pull the pin 338 in an axial direction. A second end of the pin 338 is coupled to a spring element 340. The spring element 340 preloads the pin 338 opposite to the axial direction.

[0226] Braking device 334 further includes an angle flap 342. Pin 338 has a head 344 at its second end. A first end of angle flap 342 is coupled to head 344, so that the angle flap is pivoted when cable 336 is pulled due to actuation of third actuating element 26.

[0227] Braking device 334 further includes a disc 346. Disc 346 is coupled to wheel 18 in a rotationally fixed manner. Disc 346 has recesses 348 along its circumference. Recesses 348 are identically shaped and are distributed symmetrically over the circumference of disc 346. Angle flap 342 has a projection 350 at a second end, which is shaped complementarily to recesses 348 and can be engaged with one of the recesses 348 in order to rotationally fixedly couple wheel 18 to arm 124. When projection 350 is not engaged with any of the recesses, wheel 18 is freely rotatable relative to the arm.

[0228] When the actuating element 26 is not actuated, the projection 350 is disengaged from the recesses 348.

[0229] By actuating the third actuating element 26, the pin 338 is pulled over the cable 336. This pivots the flap 342 toward the disc 346, causing the projection 350 to engage with one of the recesses 348.

[0230] Upon release of the actuation, the spring element 340 retracts the pin in the opposite direction. This pivots the flap 342 away from the disc 346, disengaging the projection 350 from the recesses 348.

[0231] Such a braking device 334 can also be arranged on both wheels 18 of the transport carriage 10.

[0232] The Figures 64 to 80 show how transport boxes can be inserted into the first receptacle 93 and the second receptacle 97 in the first operating mode 86 and in the second operating mode 126.

[0233] The receiving elements 94 and 98 of the first and second receptacles are of identical design. Each receiving element 94, 98 has a web 354 and a guide 356. The web 354 and the guide 356 are arranged on opposite sides of the receiving element 94, 98. A support surface 358 for one side of the transport box 352 extends between the web 354 and the guide 356. On this side, each transport box 352 has a projection 360 at one or both corners, which extends outward away from the transport box 352. On the opposite side, the transport box 352 also has a projection 360 at one or both corners, which extends outward away from the transport box 352. Each transport box 352 has a recess 362 in the center on each side.

[0234] When inserted into a receptacle, the web 354 is arranged in the recess 362 and the projection 360 is arranged in the guide 356. This holds the transport box 352 in the receptacle.

[0235] In the Figures 64 to 68 it is shown how a transport box 352 can be inserted into the first receptacle 93 or removed from the first receptacle 93 when the transport carriage 10 is arranged in the second operating mode 126.

[0236] For insertion, the transport box 352 is placed with the two corners on which the projections 360 are arranged on the support surface 358 of each receiving element 94 and pushed along the support surface 358 in the direction of the corresponding guide 356. This is shown in Fig. 64 shown.

[0237] The transport box 352 is pushed in the direction of the guide 356 until the projection 360 reaches the end of the guide 356, whereby the projection 360 engages with the guide. The recess 362 is aligned with the web 354. This is shown in Fig. 65 shown.

[0238] Then the transport box 352 is pivoted towards the support surface 358, whereby the recess 362 is brought into engagement with the web 354. This is Fig. 66 shown.

[0239] To remove the transport box 352, it is first pivoted away from the support surface 358 so that the recess 362 is disengaged from the web 354. This is shown in Fig. 67 shown.

[0240] Then the transport box 352 is pulled with the two corners on which the projections 360 are arranged onto the support surface 358 in such a way that the projection 360 is disengaged from the guide 356. This is shown in Fig. 68 shown.

[0241] In the Figures 69 to 72 it is shown how a transport box 352 can be inserted into the second receptacle 97 or removed from the second receptacle when the transport carriage 10 is arranged in the second operating mode 126.

[0242] For insertion, the transport box 352 is placed with the two corners on which the projections 360 are arranged on the support surface 358 of each receiving element 98 and pushed along the support surface 358 in the direction of the corresponding guide 356. This is shown in Fig. 69 shown.

[0243] The transport box 352 is pushed in the direction of the guide 356 until the projection 360 reaches the end of the guide 356, whereby the projection 360 engages with the guide. The recess 362 is aligned with the web 354. Then the transport box 352 is pivoted in the direction of the support surface 358, whereby the recess 362 engages with the web 354. This is shown in Fig. 70 shown.

[0244] To remove the transport box 352, it is first pivoted away from the support surface 358 so that the recess 362 is disengaged from the web 354. This is shown in Fig. 71 shown.

[0245] Then the transport box 352 is pulled with the two corners on which the projections 360 are arranged onto the support surface 358 in such a way that the projection 360 is disengaged from the guide 356. This is shown in Fig. 72 shown.

[0246] In the Figures 73 to 77 It is shown how a transport box 352 can be inserted into the first receptacle 93 or removed from the first receptacle 93 when the transport carriage 10 is arranged in the second operating mode 126 and another transport box 352 is arranged in the second receptacle. The insertion or removal is identical to the insertion of a transport box into the first receptacle 93 or the removal of a transport box from the first receptacle, as already described above with reference to the Figures 64 to 68 was described.

[0247] In the Figures 78 to 81It is shown how a transport box 352 can be inserted into the second receptacle 97 or removed from the second receptacle when the transport carriage 10 is arranged in the first operating mode 86 and another transport box 352 is arranged in the first receptacle 93. The insertion or removal is identical to the insertion of a transport box into the first receptacle 93 or the removal of a transport box from the first receptacle, as already described above with reference to the Figures 69 to 72 was described.

[0248] Fig. 82 shows an embodiment of a method 400 for transferring a transport vehicle 10 between a first operating mode 86 and a second operating mode 126. The transport vehicle 10 can be operated according to the Fig. 1 to 81 illustrated embodiments.

[0249] In a first step 402 of the method 400, the transport carriage 10 is transferred from the first operating mode 86 to the second operating mode 126 by means of a first actuation, in which an actuation element 197 of an actuation device 199 of the transport carriage 10 is moved in a first direction of movement.

[0250] In a further step 404 of the method 400, the transport carriage 10 is transferred from the second operating mode 126 to the first operating mode 86 by means of a second actuation in which the actuation element 197 is moved in the first direction of movement.

[0251] Fig. 82 shows an embodiment of a method 410 for transferring a transport vehicle 10 between a packing mode 12 and a first operating mode 86. The transport vehicle 10 can be transported according to the Fig. 1 to 81 illustrated embodiments.

[0252] In a first step 412 of the method 400, the transport trolley 10 is transferred from the packing mode 12, in which each wheel 18 is arranged in the folded position 74 and each side assembly 16 is arranged in the folded position 76, to the first operating mode 86, in which each wheel 18 is arranged in the unfolded position 78 and each side assembly 16 is arranged in the unfolded position 80, by means of a movement of the side assemblies 16 from the folded position 76 to the unfolded position 80, wherein the movement of each side assembly 16 between the folded position 76 and the unfolded position 80 is coupled to a movement of the corresponding wheel 18 between the folded position 74 and the unfolded position 78.

[0253] In a further step 414 of the method 400, the transport carriage 10 is transferred from the first operating mode 86 to the packing mode 12 by moving the side assemblies 16 from the unfolded position 80 to the folded position 76.

[0254] Fig. 83 shows an embodiment of a method 420 for transforming a transport vehicle 10. The transport vehicle 10 can be transformed according to the Fig. 1 to 81 illustrated embodiments.

[0255] In a first step 422 of the method 400, the transport carriage 10 is switched between the packing mode 12 and an operating mode 86 according to the method of Fig. 83 transferred.

[0256] In a further step 424 of the method 400, the transport carriage 10 is switched between the first operating mode 86 and a second operating mode 126 according to the method of Fig. 82 transferred.

Claims

1. A transport cart (10) having a base assembly (14), two opposing side assemblies (16) disposed on the base assembly (14), and a wheel (18) disposed on each of the side assemblies (16), the transport cart (10) being operable between a packing mode (12), in which each wheel (18) is arranged in a folded position (74) and each side assembly (16) is arranged in a folded position (76), and a first operating mode (86) in which each wheel (18) is arranged in an unfolded position (78) and each side assembly (16) is arranged in an unfolded position (80), wherein movement of each side assembly (16) between the folded position (76) and the unfolded position (80) is coupled to movement of the corresponding wheel (18) between the folded position (74) and the unfolded position (78) such that as each side assembly (16) is moved between the folded position (76) and the unfolded position (80), the corresponding wheel (18) is moved between the folded position (74) and the unfolded position (78), wherein the transport cart (10) further comprises a support (88) on each side assembly (16).

2. The transport cart (10) of claim 1, wherein each support (88) is disposed in a folded position (90) in the packing mode (12) and in an unfolded position (92) in the first mode of operation (86).

3. The transport cart (10) of claim 2, wherein movement of each side assembly (16) between the folded position (76) and the unfolded position (80) is coupled to movement of the corresponding support (88) between the folded position (90) and the unfolded position (92).

4. The transport cart (10) according to any of claims 1 to 3, wherein the transport cart (10) further comprises a locking device (136) configured to lock each side assembly (16) in the folded position (76) and in the unfolded position (80), wherein the transport cart (10) further comprises at least a second actuating element (24) by means of which the locking of the side assemblies (16) effected by the locking device (136) can be released.

5. The transport cart according to any of claims 1 to 4, wherein the movement of each support (88) and / or each wheel (16) is coupled to the movement of the corresponding side assembly (16) via a toggle lever (146), wherein each toggle lever (146) is arranged in the unfolded position (78, 92) of the corresponding wheel (18) or the corresponding support (88), in particular is arranged stretched, in such a way that the respective wheel (18) or the respective support (88) is held in the unfolded position (78, 92).

6. The transport cart according to any of claims 1 to 4, wherein each toggle is arranged to be stretched when the corresponding support wheel is transferred from the folded to the unfolded position and to be bent when the corresponding support wheel is transferred from the unfolded to the folded position.

7. The transport cart according to any of claims 1 to 5, further comprising at least one receptacle (93, 94) arranged between the side assemblies (16) for a respective transport box.

8. A method (410) of transferring a transport cart (10) between a packing mode (12) and a first mode of operation (86), the transport cart (10) comprising a base assembly (14), two opposing side assemblies (16) disposed on the base assembly (14), a wheel (18) disposed on each of the side assemblies (16), and at least one receptacle (93, 94) disposed between the side assemblies (16) for a respective transport box, wherein the transport cart (10) further comprises a support (88) on each side assembly (16), the method comprising the steps of: - transferring (412) the transport cart (10) from the packing mode (12), in which each wheel (18) is in a folded position (74) and each side assembly (16) is in a unfolded position (76), to the first operating mode (86), in which each wheel (18) is in an unfolded position (78) and each side assembly (16) is in an unfolded position (80) by moving the side assemblies (16) from the folded position (76) to the unfolded position (80), wherein movement of each side assembly (16) between the folded position (76) and the unfolded position (80) is coupled to movement of the corresponding wheel (18) between the folded position (74) and unfolded position (78); - transferring (414) the transport cart (10) from the first operating mode (86) to the packing mode (12) by means of moving the side assemblies (16) from the unfolded position (80) to the folded position (76).

9. A method (420) of transforming a transport cart (10), the transport cart (10) comprising a base assembly (14), two opposing side assemblies (16) disposed on the base assembly (14), and a wheel (18) disposed on each of the side assemblies (16), the method comprising the steps of: - transferring (422) a transport cart (10) between a packing mode (12) and a first operating mode (86) according to the method of claim 8; and - transferring (424) a transport cart (10) between the first operating mode (86) and a second operating mode (126) , wherein the step of transferring (424) the transport cart (10) between the first operating mode (86) and a second operating mode (126) the method comprising the steps of: - transferring (402) the transport cart (10) from the first operating mode (86) to the second operating mode (126) by means of a first actuation in which an actuating element (197) of an actuating device (199) of the transport cart (10) is moved in a first direction of movement; and - transferring (404) the transport cart (10) from the second operating mode (126) to the first operating mode (86) by means of a second actuation in which the actuating element (197) is moved in the first direction of movement.