EP1604944A2 - Elevating work platform for the displacement of people and lifting arrangement. - Google Patents

Abstract

The personnel lifting boom vehicle (10) has a chassis (12) supporting the telescopic articulated boom (18). The boom carries a frame with a base having a surrounding guard defining a working space for personnel. The frame cage can be collapsed to a transport condition in which the working space is reduced.

Description

The present invention relates to an aerial work platform for passenger transport, in particular for lifting persons, for a mobile lifting device, which a mobile undercarriage and one arranged on the base, a free, raised and lowered end for connecting to the aerial work platform comprising a lifting frame, the lifting platform comprising a frame, has a floor and a barrier and defines a receiving space, wherein the receiving space in a transport position, in which persons transportable in the aerial work platform, one transport volume having.

Furthermore, the present invention relates to a mobile lifting device with a mobile undercarriage, with an arranged on the base lifting unit and with a at a free, raised and lowered end of the lifting unit connectable aerial work platform for conveying, in particular for lifting, of People.

Mobile lifting devices with aerial work platforms for passenger transport The type described above are used wherever, in particular the construction of a stationary scaffolding is not possible or too expensive. With the lifting unit, the aerial work platform, which typically in shape a basket is formed and is also referred to as Hubarbeitskorb, with raised in the receiving space of the working platform people raised For example, work on the exterior facades of buildings or on inaccessible, high-altitude parts of industrial plants. Typically, the aerial work platforms described at the outset Kind around accessories, in particular with loading cranes of trucks connected and can be used if necessary. With a loading crane in particular, the cargo area of the truck with cargo be loaded and unloaded. Very often as transport goods containers used, which are stacked after unloading. To enter the To reach height stacked containers, it is known that as a lifting unit serving loading crane with a platform for passenger transport, which Also referred to as Hubarbeitskorb is to connect. However, they are to comply with strict safety regulations, such as the European standard EN 280. In addition to a high stability must ensure that the platform does not interfere with operation can tilt so strong that people fall out of the recording room can.

Typically, the aerial work platform becomes common with the transported goods transported on the loading area of the truck. This has a disadvantageous effect that the aerial work platform does not necessarily need to be used every time is, so that not the entire cargo area for the transport of goods to Available.

It is therefore an object of the present invention to provide a working platform for Passenger transport of the type described above and a mobile lifting device to improve the type described above so that a loading volume the mobile lifting device when simultaneously transporting the aerial work platform is maximized.

This object is achieved in an aerial work platform of the type described above According to the invention solved in that the aerial work platform of the transport position can be brought into a transport position, in which the receiving space has a transport volume, and that the transport volume is smaller than the transport volume is.

In conventional aerial work platforms for passenger transport is the frame rigid, so that the aerial work platform in practice in the transport position is transported. In contrast, it allows the platform according to the invention, to minimize a space requirement during transport, thereby reducing larger loading volume of the mobile lifting device is available than in known aerial work platforms. This is achieved in that the aerial work platform transferred from the transport position to the transport position becomes, whereby a volume of the receiving space decreases and a passenger transport not possible in the transport position with the aerial work platform is, but not required.

In a particularly simple way, the aerial work platform of the transport position can be in the transport position, if they have a folding or Sliding mechanism has for folding and / or pushing together the aerial work platform from the transport position to the transport position. Conversely, the lifting platform can be used with the folding or sliding mechanism again from the transport position to the transport position be transferred back. A loading space needs the aerial work platform minimize by the folding and / or sliding mechanism for transport. The provision of the aerial work platform for passenger transport is starting from the transport position then possible in a short time.

Preferably, at least one connecting element is provided for connecting the frame with the free end of the lifting unit. This allows the To solve aerial work platform of the lifting unit, especially if with the lifting unit goods to be loaded and unloaded.

To increase the stability of the aerial work platform, it is advantageous if the Frame a fixed relative to the at least one connecting element Has frame part and if the bottom and at least part of the Guard are movably mounted relative to the fixed frame part. By this configuration, a secure connection of the lifting unit with the frame, namely the fixed frame part allows, whereas other parts of the frame or the aerial work platform, in particular the ground and at least part of the barrier, movably mounted are so that the volume of recording space in the transition from the Reduce transport position to the transport position in the desired manner leaves.

Basically, it would be possible, the aerial work platform with the arm directly to connect at an attachment point. The safety of using the aerial work platform as well as their stability with minimized total weight the same can be favorably increased by the fact that the holding arm is fork-shaped and that the aerial work platform between two Legs of the fork-shaped holding arm is held. The aerial work platform can be connected in this case via two connecting elements with the support arm be, so that with the same stability of the working platform a Total mass of the same can be minimized.

It would be conceivable to fix the holding arm articulated to the lifting unit. According to However, a preferred embodiment may be provided that the holding arm with the at least one connecting element articulated connectable is. This allows a rigid connection of the support arm with the free end of the lifting unit. A relative movement between the aerial work platform and the support arm is by the articulated connection of the support arm allows with the at least one connecting element.

It is particularly advantageous if the aerial work platform of the transport position can be brought into a transport position, in which at least one outer dimension the aerial work platform parallel to at least one spatial direction smaller in particular is at most half as large as an external dimension of the aerial work platform in the transport position in the same spatial direction. To this Way can be a footprint of the aerial work platform for transport minimize. For example, by transferring the aerial work platform from the transport position in the transport position a side edge quasi reduced become. Otherwise all external dimensions remain constant, then becomes at least one base area with reduction of an external dimension at the same time with reduced size.

For example, an aerial work platform or a lifting work basket, which has a width, a height and a depth, so by transferring from the Transport position be reduced in the transport position that his Width is smaller, for example, less than half the width of the aerial work platform in the promotion position. This reduces in corresponding Way also a resulting from width and depth base of the aerial work platform.

The aerial work platform is particularly easy to move from the transport position transfer to the transport position when the floor at the frame at least a first pivot axis is pivotally mounted. For example, let In a preferred embodiment of the invention, the bottom is 90 ° pivot from the transport position to the transport position.

A space requirement or volume requirement of the aerial work platform in the Transport position can be further reduced if the floor at least two Floor parts included.

The at least two parts of the floor can be easily adjusted relative to one another move when they are relatively pivotable and / or displaceable are stored. A footprint of the aerial work platform, which is essentially predetermined by an area of the ground in the transport position is, can be, for example, by folding or pushing together the two bottom parts relative to each other smaller.

A total weight of the aerial work platform can be further minimized if the Frame at least partially forms the barrier. The frame takes over thus a double function. On the one hand, it gives the aerial work platform a desired Stability, on the other hand, it serves the safety of in the aerial work platform transported and as protection against falling out.

Preferably, the barrier is designed in several parts. This allows also to collapse or collapse the barrier in the desired manner, a space requirement of the aerial work platform in the transport position compared to the promotion status.

A particularly simple construction of a folding and / or sliding mechanism can be realized when the frame in the transport position at least four side walls of the working platform defining frame parts and if at least two of the four frame parts parallel to each other and / or parallel to itself are movable for transferring the aerial work platform from the transport position to the transport position.

For example, two frame parts can be made completely rigid, whereby stability of the aerial work platform increases. These can be, for example pushed together or by means of a parallel link arrangement parallel to be pivoted themselves or parallel to each other. Conceivable would be four rigid frame parts, which are four parallel, vertical corner lines the working platform defining pivot axes parallelogram-like can be merged.

In a particularly simple way, the aerial work platform can be in the transport position transfer if the at least two frame parts relative to each other can be pivoted about at least one second pivot axis. This allows in particular, the at least two frame parts independent of a pivoting the floor to pivot about the first pivot axis.

The number of relatively movable parts of the aerial work platform leaves Minimize when the at least two frame parts relative to each other are displaceable.

In a single operation, the aerial work platform can be moved from the transport position in the transport position, if the at least one first pivot axis and the at least one second pivot axis parallel to each other. This allows it to simultaneously cover the ground and at least pivot two frame parts relative to each other.

According to a preferred embodiment of the invention can be provided be that the at least one first pivot axis and the at least one second pivot axis perpendicular to each other. In this case, you can the two pivoting movements are executed at most successively, which requires two steps, but the stability of the aerial work platform in particular, because a construction is made possible, it increases which is the two pivoting movements and relatively movable Block frame parts to each other, so that the aerial work platform not by itself and inadvertently on the basis of the position of promotion can take the transport position.

In a simple way, a footprint of the platform can be reduced, if the at least one first pivot axis and / or the at least a second pivot axis parallel to the bottom of the transport position engaging aerial work platform.

It is advantageous if the at least one first pivot axis and / or the at least one second pivot axis perpendicular to the bottom of the transport position engaging aerial work platform. For example, let Such an aerial work platform virtually over corner in a parallelogram-like manner Collapse as described above. A total length of the aerial work platform in the transport position results in this case from the sum, for example Width and depth of the aerial work platform.

An advantageous embodiment of a folding mechanism for folding the aerial work platform results if at least one parallelogram arrangement comprising at least four parallel links is provided for moving Storing at least two frame parts of the frame together and when the two frame parts and the parallel links in a plan view or a side view of the aerial work platform at the transition from the transport position in the transport position in a transitional position between the Transport position and the transport position essentially the form of a Parallelogram have. For example, a side wall with the fixed frame part on the at least one parallelepiped arrangement be connected. In the same way, a second parallel link arrangement connected to the fixed relative to the connecting element frame part be. However, the parallel link arrangement can also be directly by four in parallel to the direction of gravity, pivotally connected to each other Side parts are formed so that a parallelogram-like pivoting the four side parts at the transition from the transport position is allowed in the transport position, which in a plan view of the aerial work platform is recognizable.

It is favorable if the ground in the transport position parallel to a Ground level is aligned when the parallel links in the transport position are aligned parallel or substantially parallel to the ground plane and when the parallel links in the transport position perpendicular or substantially are aligned perpendicular to the ground plane. By this configuration can the need for a footprint of the aerial work platform in the transport position minimize.

A double folding mechanism can be easily achieved by in that the two frame parts mounted in parallel relative to one another are movably mounted each have at least four links on the fixed frame part of the Frame are hinged. The two frame parts can then be parallel to each other be pivoted relative to the fixed frame part.

To increase the safety of the working platform during operation, that is when Carrying persons, it is advantageous if a security device is provided for locking relative to each other movable parts of the aerial work platform in the promotion position. The safety device ensures that the aerial work platform is not inadvertent and unwanted Way starting from the transport position by itself the transport position occupies.

A particularly simple construction of the securing device results when this comprises a plurality of securing elements, which in the transport position in corresponding fuse element receptacles of at least two movably mounted to each other parts of the frame insertable are. For example, security bolts can be in corresponding bolt receptacles insert, the two movably mounted parts penetrate and with inserted safety pin so a relative movement prevent the two parts. It would also be conceivable to be part of the Provide frame ball pressure which in corresponding recesses a connected to this frame part second frame part in the Submerge promotion position and so a relative movement of the two together prevent moving parts.

The construction of the aerial work platform is simplified when the Floor aligned in the transport position parallel to a ground plane and if the aerial work platform is at least two to each other and to the ground level has perpendicular symmetry planes. In particular, you can the two planes of symmetry be defined so that in any position in the transition from the transport position to the transport position the aerial work platform is symmetrical to these two levels.

Furthermore, the stability of the aerial work platform increases in that the fixed frame part of the frame symmetrical to both planes of symmetry can be trained. By this configuration, the lifting unit attack symmetrically at the aerial work platform, resulting in a minimum total weight ensures a desired stability.

Preferably, at least a portion of the floor is parallel in the transport position or aligned substantially parallel to one of the two planes of symmetry. As a result, for example, the ground can be based on the transport position fold up to transfer to the transport position, whereby a footprint of the aerial work platform is minimized.

The object initially stated is in a mobile lifting device of The type described above achieved according to the invention that the aerial work platform one of the aerial work platforms described above. With such Lifting platform, which in the transport position one compared to Transport position reduced space or volume requirement can on a loading area of the mobile lifting device Transport of the invention, the transport position engaging aerial work platform more goods are transported than with conventional ones Aerial work platforms.

It is particularly advantageous if the undercarriage is self-propelled. For example the undercarriage may be a motor vehicle. Basically It is also conceivable that the subframe formed in the form of a trailer is, which can be pulled by a towing vehicle.

In principle, it would be possible, the aerial work platform also below a loading area to arrange the subframe. However, the aerial work platform for the Lifting unit particularly easy to access, resulting in a connection of the two Parts simplified together, it is advantageous if the undercarriage a Driver's cab carries when a transport space between the cab and the Lifting unit has a minimum dimension that is smaller than a smallest External dimensions of the aerial work platform in the transport position and if the Lifting platform in the transport position, in which the aerial work platform to a place of use is brought into the transport space between the cab and the lifting unit is insertable. The transport space does not have to be to be introverted. It is also to be understood that between the lifting unit and the cab is enough space available at which the aerial work platform can be accommodated during transport to the place of use is.

Preferably, the lifting unit is a hydraulic lifting unit. Such a lifting unit can be formed very compact.

In order to increase a radius of action of the lifting device, the lifting unit preferably rotatably mounted on the base frame.

It would be conceivable, the aerial work platform at the free end of the lifting unit rigid to arrange. However, to increase the working radius of the aerial work platform, is conveniently the aerial work platform at the free end of the lifting unit movable stored. Thus, the aerial work platform in a particular embodiment the invention be designed so that they are independent relative Leveled to the direction of gravity.

According to a further preferred embodiment of the invention can be provided be that the ground in the transport position parallel to a ground plane is aligned and provided an automatic leveling device is to move the aerial work platform relative to the free end of the Lifting unit such that a between the ground plane and a plane transverse to Gravity direction included angle is maximum 10 °. Preferably this angle is maximum 5 °. The automatic leveling device ensures that a slope of the ground plane relative to the direction of gravity does not exceed a certain predetermined angle. This prevents that transported in the working platform people can fall out of this.

Figur 1:

eine Seitenansicht einer fahrbaren Hebevorrichtung mit einer in einem Transportraum zwischen einer Hubeinheit und einem Führerhaus gelagerten, eine Transportstellung einnehmenden Hubarbeitsbühne;

Figur 2:

eine perspektivische Ansicht der Hubarbeitsbühne aus Figur 1 in einer Beförderungsstellung;

Figur 3:

eine Draufsicht auf eine Stirnseite einer in Figur 2 dargestellten Hubarbeitsbühne;

Figur 4:

eine perspektivische Ansicht einer in Figur 2 dargestellten Hubarbeitsbühne in der Transportstellung; und

Figur 5:

eine Ansicht ähnlich Figur 3 einer die Transportstellung einnehmenden Hubarbeitsbühne.

The following description of a preferred embodiment of the invention serves in conjunction with the drawings for further explanation. Show it:

FIG. 1:

a side view of a mobile lifting device with a mounted in a transport space between a lifting unit and a cab, a transport position engaging aerial work platform;

FIG. 2:

a perspective view of the aerial work platform of Figure 1 in a transport position;

FIG. 3:

a plan view of an end face of a lifting platform shown in Figure 2;

FIG. 4:

a perspective view of an aerial work platform shown in Figure 2 in the transport position; and

FIG. 5:

a view similar to Figure 3 a transport position occupying the working platform.

In Figure 1 is a total provided with the reference numeral 10, mobile Lifting device shown, in the form of a truck 12, which between a cargo area 14 and a cab 16 a hydraulic Loading crane 18 carries. The loading crane 18 is mehrgliedrig and telescoping educated. In addition, it has a free end 20, on which a plurality can be coupled by accessories, in particular an aerial work platform 22 for passenger transport. To expand a workspace or also action radius is a boom 24 of the loading crane 18 on a crane platform 26 rotatably mounted.

The structure of the aerial work platform 22 will be described below in connection with 2 to 5 explained in more detail.

The aerial work platform 22 comprises a multi-part frame 28, which a cuboid outer contour with a width 30, a depth 32 and a height 34 has. The frame 28 encloses or defines a receiving space 36, which can be climbed by persons with the Transported, especially to be lifted. In the Figures 2 and 3 is the aerial work platform in the so-called transport position shown, that is in the position in which in the recording room 36 persons staying in accordance with European standard EN 280 for mobile aerial work platforms can be transported respectively allowed to. Two outer dimensions of the frame 28, namely the width 30 and the depth 32 each accept their maximum values in the promotion position.

The frame 28 comprises as a core piece a U-shaped frame part 38 with a parallel to a bottom 40 extending cross member 42 and two vertically and parallel to each other from this leg projecting at its ends 44 and 46. In the region of a free end of the leg 44 is a drive 48th assembled. The drive 48 includes a not shown, as a bearing shaft 54 serving drive shaft, which one of the two legs 44 and 46 passing through Rotary axis 50 defined. The drive 48 forms a quasi first, am Frame part 38 arranged connecting element. A rotationally symmetric to the axis of rotation 50 on the leg 46 arranged bearing shaft 52 serves together with the out of the drive 48 outwardly projecting bearing shaft 54 respectively an attachment point for a fork-shaped holding arm 56, which has a parallel to the cross member 42 extending cross member 58 and two parallel to each other and perpendicular from the cross member 58 projecting legs 60 and 62nd includes, whose free ends are connected to the bearing shafts 52 and 54. This arrangement allows the holding arm 56 in total about the axis of rotation 50 to pivot. In the middle of the cross member 58 is a coupling part 64th arranged, by means of which the holding arm 56 with the free end 20 of the loading crane 18 can be rigidly connected.

On the legs 44 and 46 of the frame part 38 are parallel to the floor 40th and parallel to each other three transverse struts 66 on the leg 44 and three Cross struts 68 arranged on the leg 46. The frame part 38 is together with the transverse struts 66 and 68 symmetrical to a first plane of symmetry 72 formed, which parallel to the cross member 42 and the legs 44 and 46 runs. A second, perpendicular to the first plane of symmetry 72 Symmetry plane 74 is also perpendicular to the cross member 42. Except for the one-sided arrangement of the drive 48 is the entire working platform 22nd formed symmetrically to both planes of symmetry 72 and 74.

Each of the cross braces 66 and 68 is in extension of their longitudinal direction respectively about a bearing pin 76 or 78 um of the bearing pin 76 or 78 defined, mutually parallel pivot axes 80 with in each case a link 82 or 84 and via further bearing pin 76th or 78 with a first and second side part 86, respectively or 88 connected. This results in a side view, such as 3 can be seen, a rectangular frame structure with an inner, through the leg 44 with the links 82 and the leg 46 formed with the links 84 cross-shaped strut. The Side parts 86 and 88 are identical and also have one rectangular frame with an internal, cross-shaped strut on. The floor 40 is defined by two elongated, rectangular floorboards 90 and 92 formed on the one hand rigid with a handlebar 82 and on the other are rigidly connected to a handlebar 84.

The connecting the links 82 and 84 with the side parts 86 and 88 Bearing pins 76 and 78 define further pivot axes 94, which are all parallel to each other and parallel to the pivot axes 80th and the axis of rotation 50 run.

Adjacent to the floor 40 is the working platform 22 with an upward protruding, circumferential, provided in total with the reference numeral 96 Edge, which consists of individual edge elements 98 and 100, wherein each of the side members 86 and 88 having an elongate rectangular Edge member 98 connected and each of the bottom plates 90 and 92nd connected handlebar 82 and 84 each provided with a peripheral element 100 is. The side parts 86 and 88 together with the edge 96 and the legs 44 and 46 in conjunction with the links 82 and 84 form a barrier the aerial work platform 22.

For stowing the aerial work platform 22 is a storage space 102 between the Cab 16 and the loading crane 18 provided. A width 104 of the storage space 102 parallel to the longitudinal direction of the truck 12 is approximately half as large as the depth 32 of the aerial work platform 22 in the in FIGS. 2 and 3 transport position shown. To the aerial work platform 22 in the storage space 102, it must be moved from the promotion status to the place of Figures 4 and 5 shown transport position are transferred. To this The purpose is initially a security device not shown solved at the aerial work platform 22. For this purpose, each side part 86 and 88 a safety lever 106 or 108 arranged, by means of which safety pin on a not shown cable system a locking position to be transferred to an unlocked position can. The securing bolts are arranged so that in a locking position the links 82 and 84 immovable relative to the side members 86 and 88 are held and run parallel to the bottom 40. After unlocking the Securing device are the links 82 and 84 due to their storage by means of the bearing pins 76 and 78 relative to the side members 86 and 88 movable. That is, the links 82 and 84 may be relative to the stationary one Frame part 38 are pivoted about the pivot axes 80 and simultaneously relative to the side members 86 and 88 about the pivot axes 94. The handlebars 82 and 84 in conjunction with the bearing pins 76 and 78 thus form a Handlebar arrangement of a folding mechanism. The folding mechanism allows it, the two side parts 86 and 88 parallel to itself and in parallel to move toward each other in the direction of the fixed frame part 38, the means to turn. The links 82 and 84 are relative to the Cross struts 66 and 68 folded up.

The illustrated in Figures 4 and 5, folded transport position the working platform 22 has a width 30, the width 30 in the transport position equivalent. In contrast, a depth 110 in the transport position smaller than the depth 32 in the transport position, something less than half as wide. An overall height 112 specified by the frame 28 in the transport position is greater than the height 34 in the transport position, namely about two times the length of a handlebar 82 and 84, respectively. In any case, an area requirement is reduced on the loading area 14 of the truck 12 for the aerial work platform 22 according to the reduction of Depth 110 opposite the depth 32. Further, the depth 110 is slightly smaller than the depth Width 104 of the storage space 102, so that the aerial work platform 22 in the transport position introduced into the storage space 102 and therein to a site transported or can only be stored. Before insertion into the Storage space 102, the holding arm 56 is pivoted under the aerial work platform 22, so that the cross member 58 of the support arm 56 below the cross member 42 of the frame part 38 is arranged, as shown in Figure 1.

By transferring the working platform 22, a volume is reduced the receiving space 36 in about halfway through the transition from Transport position to the transport position. This has the advantage that the Loading area 14 of the truck 12 except for the storage space 102, which opposite previously known aerial work platforms in the transport position a has reduced space requirements, completely for loading of goods is available, for example for containers, especially standard containers 114, 116 and 118, as shown in FIG. It is in FIG. 1 It is not difficult to see that during transport of the working platform 22 in FIG the transport position not all of the three illustrated container 114, 116th and 118 but at most two of them. So can by the inventively improved aerial work platform 22 a loading volume the mobile lifting device when simultaneously transporting the aerial work platform be maximized.

In an analogous manner as described above, the aerial work platform 22 of the Transport position are transferred back to the transport position by Pivoting the side parts 86 and 88 relative to the fixed frame part 38th

The drive 48 in conjunction with a controller, not shown forms a leveling device with which it can be ensured that a bottom plane defined by the floor 40 relative to one with respect to the direction of gravity perpendicular plane never includes an angle, the greater than 10 °, preferably not greater than 5 °. This is achieved by that the control drives the drive 48 so that the support arm 46th adjusted relative to the fixed frame part 38 according to this specification becomes.

Claims (35)

Lifting platform (22) for transporting persons, in particular for lifting persons, for a mobile lifting device (10) comprising a mobile underframe (12) and a free, raisable and lowerable end (20) for connection to the underframe (12) comprising lifting platform (18) with the aerial work platform (22), the aerial work platform (22) having a frame (28), a floor (40) and a baffle (44, 46, 82, 84, 86, 88) and a receiving space (36) defined, wherein the receiving space (36) in a transport position in which persons in the aerial work platform (22) are conveyed, has a transport volume, characterized in that the aerial work platform (22) can be brought from the transport position to a transport position, in which of the receiving space (36) has a transport volume, and that the transport volume is smaller than the transport volume. An aerial work platform according to claim 1, characterized in that the aerial work platform (22) has a folding and / or sliding mechanism (76, 78, 82, 84) for folding and / or pushing the aerial work platform (22) from the transport position into the transport position. Lifting platform according to one of the preceding claims, characterized in that at least one connecting element (52, 54) is provided for connecting the frame (28) to the free end (20) of the lifting unit (18). An aerial work platform according to claim 3, characterized in that the frame (28) has a frame part (38) fixed relative to the at least one connecting element (52, 54) and in that the bottom (40) and at least part of the casing (22, 84, 86, 88) are movably mounted relative to the fixed frame part (38). Aerial working platform according to one of the preceding claims, characterized in that the working platform (22) can be articulated via a holding arm (56) to the free end (20) of the lifting unit (18). An aerial work platform according to claim 5, characterized in that the holding arm (56) is fork-shaped and that the working platform (22) between two legs (60, 62) of the fork-shaped holding arm (56) is held. Lifting platform according to one of claims 5 or 6, characterized in that the holding arm (56) with the at least one connecting element (52, 54) is articulated connectable. Lifting platform according to one of the preceding claims or according to the preamble of claim 1 or according to the preamble of claim 1 and one of claims 2 to 7, characterized in that the aerial work platform (22) can be brought from the transport position into a transport position, in which at least one Outside dimension (110) of the aerial work platform (22) parallel to at least one spatial direction is smaller, in particular at most half as large, as an external dimension (32) of the aerial work platform (22) in the transport position in the same spatial direction. Aerial working platform according to one of the preceding claims, characterized in that the bottom (40) on the frame (28) about at least a first pivot axis (80, 94) is pivotally mounted. Lifting platform according to one of the preceding claims, characterized in that the bottom (40) comprises at least two bottom parts (90, 92). Lifting platform according to claim 10, characterized in that the at least two base parts (90, 92) are mounted relative to each other pivotable and / or displaceable. Aerial working platform according to one of the preceding claims, characterized in that the frame (28) at least partially forms the casing (44, 46, 82, 84, 86, 88). Aerial working platform according to one of the preceding claims, characterized in that the reinforcement (44, 46, 82, 84, 86, 88) is designed in several parts. Lifting platform according to one of the preceding claims, characterized in that the frame (28) in the conveying position at least four side walls of the working platform (22) defining frame parts (86, 88) and that at least two of the four frame parts (86, 88) parallel to each other and / or are movable parallel to itself for transferring the working platform (22) from the transport position to the transport position. An aerial work platform according to claim 14, characterized in that the at least two frame parts (86, 88) are pivotable relative to each other about at least one second pivot axis (80, 94). Lifting platform according to claim 14, characterized in that the at least two frame parts (86, 88) are displaceable relative to one another. An aerial work platform according to claim 15, characterized in that the at least one first pivot axis (80, 94) and the at least one second pivot axis (80, 94) are parallel to each other. An aerial work platform according to claim 15, characterized in that the at least one first pivot axis (80, 94) and the at least one second pivot axis are perpendicular to each other. Aerial working platform according to one of claims 9 to 18, characterized in that the at least one first pivot axis (80, 94) and / or the at least one second pivot axis (80, 94) parallel to the bottom (40) of the access platform occupying the transport platform (22) run. An aerial work platform according to any one of claims 9 to 18, characterized in that the at least one first pivot axis and / or the at least one second pivot axis are perpendicular to the bottom (40) of the access platform occupying the transport platform (22). An aerial work platform according to any one of claims 14 to 20, characterized in that at least one parallel-link arrangement (76, 78, 82, 84) comprising at least four parallel links (82, 84) is provided for movably supporting at least two frame parts (38, 86, 88) the frame (28) to each other and that the at least two frame parts (38, 86, 88) and the parallel links (82, 84) in a plan view or a side view of the aerial work platform (22) in the transition from the transport position to the transport position in a transitional position have substantially the form of a parallelogram between the transport position and the transport position. An aerial work platform according to claim 21, characterized in that the floor (40) is aligned in the conveying position parallel to a ground plane, that the parallel links (82, 84) in the conveying position are aligned parallel or substantially parallel to the ground plane and that the parallel links (82 , 84) are aligned in the transport position perpendicular or substantially perpendicular to the ground plane. Lifting platform according to one of Claims 21 or 22, characterized in that the two frame parts (86, 88) mounted so as to be movable relative to one another are each articulated on the stationary frame part (38) of the frame (28) via at least four links (82, 84). An aerial work platform according to any one of the preceding claims, characterized in that a securing device (106, 108) is provided for locking relatively movable parts (38, 82, 84, 86, 88) of the aerial work platform (22) in the conveying position. An aerial work platform according to claim 24, characterized in that the securing device (106, 108) comprises a plurality of securing elements which, in the transport position, engage in corresponding securing element receptacles of at least two moveably mounted parts (38, 82, 84, 86, 88) of the frame ( 28) are insertable. Lifting platform according to one of the preceding claims, characterized in that the floor (40) is aligned in the conveying position parallel to a ground plane and that the aerial work platform (22) has at least two symmetry planes (72, 74) perpendicular to each other and to the ground plane. An aerial work platform according to claim 26, characterized in that the fixed frame part (38) of the frame (28) is symmetrical to both planes of symmetry (72, 74). An aerial work platform according to one of claims 26 or 27, characterized in that at least part of the floor (40) in the transport position is aligned parallel or substantially parallel to one of the two planes of symmetry (72). Mobile lifting device (10) with a mobile underframe (12), with a lifting unit (18) arranged on the underframe (12) and with a lifting platform (22) which can be connected to a free, liftable and lowerable end (20) of the lifting unit (18) for conveying, in particular for lifting, persons, characterized in that the aerial work platform (22) is an aerial work platform (22) according to one of the preceding claims. Lifting device according to one of the preceding claims, characterized in that the underframe (12) is self-propelled, in particular a motor vehicle (12). Lifting device according to one of claims 29 or 30, characterized in that the undercarriage (12) carries a driver's cab (16), that a transport space (102) between the driver's cab (16) and the lifting unit (18) has a minimum dimension (104) , which is smaller than a smallest external dimension (32) of the aerial work platform (22) in the transport position and that the aerial work platform (22) in the transport position, in which the aerial work platform (22) can be brought to a place of use in the transport space (102) the driver's cab (16) and the lifting unit (18) can be inserted. Lifting device according to one of claims 29 to 31, characterized in that the lifting unit (18) is a hydraulic lifting unit (18). Lifting device according to one of claims 29 to 32, characterized in that the lifting unit (18) is rotatably mounted on the underframe (12). Lifting device according to one of claims 29 to 33, characterized in that the working platform (22) is movably mounted at the free end (20) of the lifting unit (18). Lifting device according to Claim 34, characterized in that the floor (40) is aligned in the conveying position parallel to a ground plane and in that an automatic leveling device (48) is provided for moving the working platform (22) in the conveying position relative to the free end (20). the lifting unit (18) such that a trapped between the ground plane and a plane transverse to the direction of gravity angle is a maximum of 10 °.

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