EP4067288B1 - Lifting and transporting device - Google Patents

Description

The invention relates to a lifting and moving device for lifting and moving objects with a low clearance height according to the first patent claim.

In order to move loads horizontally, such as heavy workpieces or machines, they usually have to be lifted at several points using lifting devices and then placed and moved onto suitable moving devices. Lifting and moving devices of the type mentioned above are used in particular for this purpose. The simultaneous use of several independent moving devices that lift together and move in formation offers the advantage that the load can be lifted and carried at practically any point. The number of moving devices depends on the mass of the load to be lifted.

However, when lifting loads with several lifting and moving devices, stability, the maneuvering space required and the clearance height (clear height of the load above the ground) currently pose challenges.

Forklifts and sideloaders are well known. They have a travel device as the base body and a lifting device with a mostly fork-shaped load holder. The base body forms a counterweight for a lifted load on the load holder. For example, EN 198 19 270 B4 a side loader, with a base body, with a driver's cabin arranged on the base body and with a laterally extendable lifting device with a fork arranged on the base body. Also US 5 112 183 A discloses such a sideloader, whereby the base body (chassis) has a chassis with wheels, but can also optionally be lowered to the ground, whereby the weight of the load taken up can be transferred directly to the ground via the chassis, relieving the load on the wheels. There is no provision for the lifting element itself to come into contact with the ground.

Furthermore, EP 1 129 983 A2 , DE 32 24 817 A1 and CN 111 606 250 A Forklift truck with a chassis with wheels and a lifting element with forks mounted on the chassis for picking up a load. The lifting element has vertically adjustable forks for raising and lowering the load, and horizontally adjustable forks raised above a support on the chassis for transferring the load to the support. As is usual with forklift trucks, the weight of the load is always transferred to the ground via the chassis and the wheels, whereby the chassis has to have a considerable counterweight to the load due to the wheels being arranged eccentrically to the load. Here, too, there is no provision for the lifting element to come into contact with the ground.

The stability of the lifting devices and, if applicable, the chassis of a forklift or sideloader is crucial for the function and safety of the lifting process. To prevent the lifting devices from tipping over, there must be a sufficient counterweight at a sufficient distance from the point of application of the load so that the resultant of the tipping force (load on the load receiver) and weight force (vehicle mass and, if applicable, counterweight) lies within the contact area of the lifting device above the ground.

The use of counterweights has the advantage that the weight of the load can be transferred directly via the chassis of the transport vehicle and can therefore also be moved horizontally. The counterweight means that the load does not have to be supported within the contact area. This means that loads with a low clearance above the ground can also be lifted (see the tines of a forklift truck), even if the chassis cannot be moved under the load due to its height. However, depending on the load to be lifted, high counterweights with a corresponding lever arm must be provided in order to ensure stability when lifting. This makes the vehicles larger and heavier, and the need for maneuvering space increases. If the transport vehicles are to be moved horizontally relative to the load, for example to position them under the load and to set the load down on the vehicles, there is another disadvantage. When the load is raised, the entire weight of the load always acts on the chassis of the transport vehicles. The horizontal movement relative to the load body, which is used in the coordinated use of several transport vehicles with This is particularly relevant for lifting devices and can affect stability, for example when individual transport vehicles have to negotiate uneven ground.

Furthermore, forklift devices without a counterweight, but with support arms or support rollers, which are arranged under the fork and support the travel device against tipping, are known. DE 80 06 558 U1 For example, a forklift truck with support rollers arranged under the fork is known, which are widely used in warehousing as so-called ants. Telescopic arm forklifts are also common in the construction and maintenance sector, with support arms that extend under the fork preventing tipping over under load.

Forklift trucks without a counterweight are characterized by an enlarged contact surface that covers the point of application of the load as much as possible. This has the advantage that a larger counterweight that also weighs on the ground can be dispensed with. In order to be able to lift loads with a low clearance above the ground, the height of this enlarged contact surface must be as low as possible, otherwise it cannot reach under the load to be lifted. With low heights, the integration of a chassis into the part of the contact surface that reaches under the load is no longer technically sensible, so the load is initially only lifted vertically and supported by support arms (see machine jack). After the load has been lifted, the weight of the load must be transferred to a movable chassis in a second step. Compared to using a counterweight, this means that the transport vehicle or chassis can be freely positioned under the load without a load. Any influence on stability by moving the chassis is therefore initially ruled out.

DE 20 2012 102 062 U1 discloses, for example, a lifting and moving device with chain drives and lifting devices arranged on them, with which loads can be picked up on a centrally arranged turntable. The lifting devices are arranged below the turntable and serve to lift the turntable with the load on it. Due to their size, they also determine the minimum possible underride height for such chassis and also for comparable tank rollers with lifting devices.

Based on this, one object of the invention is to propose a lifting and moving device for lifting and moving objects with a low clearance height, which does not have the aforementioned limitations.

A further task is to propose a lifting and moving device which is suitable for the automated and coordinated lifting of loads with a low clearance height above the ground without the use of a counterweight and for setting down on suitable load-carrying devices of these vehicles without affecting the stability of the lifted load.

The object is achieved with a lifting and moving device having the features of the first patent claim. Subclaims referring back to this claim provide advantageous embodiments.

1. a) Einen Verfahrschemel mit Rollen mit jeweils einer Drehachse sowie einem Chassis, wobei die Rollen zumindest eine Verfahrrichtung auf dem Untergrund vorgeben.
2. b) Eine Auflage über dem Chassis. Über dem Chassis bedeutet hier, dass die Auflage oberhalb des Chassis, d.h. auch unmittelbar auf dem Chassis aufgesetzt ist.
3. c) Ein im Chassis integriertes vertikal und/oder horizontal zwischen mehreren Stellpositionen motorisch verfahrbares Hebeelement mit mindestens einer nach oben weisenden horizontalen Hebefläche auf einer exponierten Extremität am unteren Ende. Diese mindestens eine Hebefläche weist gegen ein Verrutschen eines aufgenommenen Gegenstands vorzugsweise Fixierungs- oder Friktionselemente auf. Weiter bevorzugt grenzt mindestens eine bevorzugt horizontale Hebefläche an eine vertikale Gegenlagerfläche an. Bei Aufnahme eines Gegenstands liegt die Gegenlagerfläche vorzugsweise an den Gegenstand an und behindert oder begrenzt dann in vorteilhafter Weise zusätzlich ein Aufkippen der Hebe- und Verfahrvorrichtung zum Gegenstand hin, insbesondere wenn der Fahrschemel beim Anheben des Hebewerkzeugs zum Gegenstand kippt.

The solution to the problem includes a lifting and moving device for lifting and moving objects with a low clearance above a surface, preferably a paved, flat traffic area, e.g. a logistics area or a production line. The lifting and moving device has at least the following components and/or assemblies:

1. a) A travel bolster with rollers, each with an axis of rotation and a chassis, whereby the rollers specify at least one direction of travel on the ground.
2. b) A support above the chassis. Above the chassis here means that the support is above the chassis, ie it is placed directly on the chassis.
3. c) A lifting element integrated in the chassis that can be moved vertically and/or horizontally between several positions by motor, with at least one horizontal lifting surface pointing upwards on an exposed extremity at the lower end. This at least one lifting surface preferably has fixing or friction elements to prevent a picked up object from slipping. More preferably, at least one preferably horizontal lifting surface borders on a vertical counter-bearing surface. When an object is picked up, the counter-bearing surface preferably rests against the object and then advantageously prevents or limits the lifting and moving device from tipping towards the object, in particular when the subframe tips towards the object when the lifting tool is raised.

The lifting surface of the lifting and moving device can be moved in at least two positions: In a first horizontally advanced position, the lifting surface can be positioned in front of or next to the chassis and below the underride height. In a second horizontally retracted position, the lifting surface can be positioned above the chassis above the support.

In the first setting position, the lifting element preferably rests directly on the ground or, more preferably, rests on the ground with a support surface. a maximum possible lowering of the lifting surface above the ground can be achieved.

The second horizontally pushed back position is preferably only an intermediate position before a further horizontally pushed back lowered position, which is assumed by a preferably vertical lowering of the lifting surface at least below the support surface of the support. With this vertical lowering, the lifting element is preferably inserted in the chassis. Optionally, it is proposed to lower the lifting element directly onto the ground before and/or during this lowering. The weight of the object resting on it is then advantageously transferred via the support surface into the ground, while the chassis and the rollers as well as the suspension of the lifting element are relieved in the ground.

The chassis of the travel bolster is the carrier component of the subsequent components and preferably contains their drive components such as motor and transmission units as well as control and regulation components, sensors and energy storage devices (preferably accumulators or batteries).

The rollers, or at least some of the rollers, are preferably solid rubber-tired load rollers. They are preferably motor-driven, preferably individually or in groups.

Preferably, the rollers are arranged in their vertical position on the chassis via their axis of rotation, preferably in groups, so that they can be moved vertically between at least one lower extended position and one upper retracted position, with a roller in the lower position projecting downwards beyond the chassis to the ground and in the upper position not projecting downwards beyond it. The rollers are thus individually, in groups and as a whole on or in the chassis. retractable and extendable, whereby only the extended rollers protrude beyond the vertical extent of the chassis and are thus basically able to form a support point for the lifting and moving device on the ground. Preferably, all of the rollers extended in the lower positions are in contact with the ground. The lifting and moving device is supported by the extended rollers, ie the support points on the ground, whereby the center of gravity of the lifting and moving device is preferably located in a support area that is spanned by the sum of the support points.

If all the rollers are in the retracted position, the chassis itself rests on the ground. The retracted rollers, in particular their drive and adjustment mechanism, are advantageously unloaded. For this purpose, the chassis is designed to be flat on the underside or provided with exposed rigid support extremities, preferably also with an anti-slip, but preferably compression-resistant friction surface or coating such as an elastomer or rubber. An alternative design provides for the chassis to be provided on the underside with passive ball rollers or support rollers instead of the flat design of those or the exposed support extremities, which are either fixed or vertically spring-loaded in the chassis. In the case of the previously described actively extended rollers, they do not reach down to the ground, but only take over the support function of the previously extended rollers when all the rollers are retracted and then also span the aforementioned support area. In contrast to the rollers, the aforementioned ball rollers or support rollers in particular do not have any drives or adjustment or lifting mechanisms that are loaded and worn during use.

A further embodiment provides for the aforementioned ball or support rollers to be designed with brakes or parking brakes, preferably friction brakes, more preferably passive friction brakes, in which braking elements are pressed against the rollers with the applied load. The friction increases with the load, preferably to the point of complete blocking of the roller.

Further preferably, rollers are divided into roller groups, with vertical projection lines of the rotation axes of the rollers of each roller group being arranged parallel to one another on the substrate and each specifying a direction of travel orthogonal to the rotation axes. The projection lines on the substrate result from the projection of the rotation axes on the substrate, which is oriented orthogonally to the substrate.

Each orientation of a rotation axis indicates a rolling direction and thus also a travel direction for the roller mounted on it. If this roller is extended and has contact with the ground, this travel direction of the roller also corresponds to that of the lifting and travel device.

It is therefore proposed within the scope of a preferred embodiment to combine rollers with a common direction of travel in one of the aforementioned roller groups. The rollers should be extended and retracted and thus the direction of travel should be activated or deactivated uniformly in the respective groups.

The rollers of each roller group preferably consist of motor-driven rollers, more preferably only of motor-driven rollers.

An advantageous alternative embodiment provides a roller group with at least three rollers that can preferably, but not necessarily, be extended and retracted, with two rollers being individually driven and preferably having the same direction of travel, but being individually driven. The at least one further roller is designed as a passive, i.e. non-driven ball roller. The two driven rollers are preferably not pivotable. In this way, a lifting and moving device is created that can be driven and steered via an individual control of these two rollers.

In a further embodiment, it is preferably proposed that at least some of the rollers of the travel bolster can be driven by a motor, preferably individually or in a roller group. This means that the extended rollers of a roller group are basically driven in the same way and specify a common direction of travel, but the lifting and travel device can also be controlled or rotated by means of different control of the driven rollers (such as in tracked vehicles).

In a further embodiment, it is preferably proposed that the rollers or some of the rollers are mounted so that they can pivot about at least one axis that is different from the axis of rotation. When a roller axis of rotation pivots in this way, the direction of travel also pivots. If, for example, only some of the axes of rotation of an (extended) roller group are pivoted while the remaining part of the axes of rotation are not pivoted, the roller group has two or more directions of travel. In this way, the lifting and moving device can be steered like a wheeled vehicle.

The support above or on the chassis of the lifting and moving device serves as a support for an object placed on top, which is picked up by the motor-driven lifting element, lifted above the chassis and moved over the support.

Preferably, the support is arranged vertically above the support area, which advantageously prevents the travel bolster from tipping over when an object is placed on it.

The support preferably has a support surface that can be rotated and/or pivoted. This advantageously enables rotation and tilting mobility between the lifting and moving device and the object resting on it, which enables an object to be transported with reduced friction and tilting, particularly on several lifting and moving devices, even on uneven surfaces.

The support surface is preferably flat, i.e. level, so that an object resting on it can be placed flat and transported.

In particular, but not only when used on flat surfaces such as a hall floor, it is preferably proposed to design the travel bolster of the lifting and travel device to be rotatable at least only about one axis, which runs orthogonally through the preferably flat support surface and more preferably orthogonally to the surface (support surface horizontal or parallel to the surface).

In a further preferred embodiment, it is proposed to design the lifting element so that it can be moved horizontally in the direction of travel between several positions by motor. This improves in particular the lateral positioning of the object on the support surface by the lifting element.

The lifting element is guided and movable in or on the chassis, preferably with at least one rail guide. The rail guide is also preferably used for the horizontal and vertical mobility of the lifting surface above the chassis and is characterized in particular by its typical good load transferability from the lifting surface to the chassis via a low-friction wheel-rail contact.

According to the invention, the lifting element comprises a lifting device for vertical movement, which has an upwardly facing horizontal lifting surface on an exposed extremity. The lifting device preferably comprises a vertical adjustment mechanism, implemented for example by a hydraulic piston drive (e.g. with a one-sided plunger piston) or mechanically, for example via spindle drives, lever reductions or other rack drives. It is therefore proposed to realize the horizontal and vertical movements preferably with separate means, with a particularly suitable implementation as mentioned above being advantageous for each of the directions mentioned.

• Fig.1a und b eine Hebe- und Verfahrvorrichtung mit angehobenem (a) und auf den Untergrund vertikal abgesenktem Schlitten mit Stützelementen und Hubvorrichtung (b) der ersten Ausführungsform vor Aufnahme eines schematisch dargestellten Gegenstands,
• Fig.2 die Hebe- und Verfahrvorrichtung gemäß Fig.1b mit auf der Hebefläche in einer ersten horizontal vorgeschobenen und vertikal abgesenkten Stellposition aufgenommenen Gegenstand,
• Fig.3 die Hebe- und Verfahrvorrichtung mit dem Gegenstand auf der Hebefläche gemäß Fig.2 , jedoch vertikal über das Chassis angehoben,
• Fig.4 die Hebe- und Verfahrvorrichtung mit dem Gegenstand auf der Hebefläche über dem Cassis gemäß Fig.3 , jedoch in einer zweiten horizontal zurückgeschobenen Stellposition oberhalb der Auflage,
• Fig.5 die Hebe- und Verfahrvorrichtung mit dem Gegenstand auf der Hebefläche oberhalb der Auflage gemäß Fig.4 , jedoch auf die Auflagefläche der Auflage abgesenkt sowie
• Fig.6 die Hebe- und Verfahrvorrichtung mit dem Gegenstand auf der Auflagefläche der Auflage gemäß Fig.5 , jedoch mit abgesenkter Hebefläche.

The invention and its mode of operation are explained in more detail using the following embodiment, the following figures and descriptions. All features shown and their combinations are not limited to this embodiment. Rather, they should be viewed as representative of other possible, but not explicitly shown as embodiments, further configurations that can be combined. Each shows a perspective view of

• Fig.1a and b a lifting and moving device with raised (a) and vertically lowered carriage on the ground with support elements and lifting device (b) of the first embodiment before picking up a schematically shown object,
• Fig.2 the lifting and moving device according to Fig.1b with the object placed on the lifting surface in a first horizontally advanced and vertically lowered position,
• Fig.3 the lifting and moving device with the object on the lifting surface according to Fig.2 , but raised vertically above the chassis,
• Fig.4 the lifting and moving device with the object on the lifting surface above the Cassis according to Fig.3 , but in a second horizontally retracted position above the support,
• Fig.5 the lifting and moving device with the object on the lifting surface above the support according to Fig.4 , but lowered to the support surface of the support and
• Fig.6 the lifting and moving device with the object on the support surface of the support according to Fig.5 , but with a lowered lifting surface.

The Figures 1 to 6 show the process of picking up an object 2 based on a preferred embodiment of the lifting and moving device 1. The object is shown symbolically in the figures only as a cuboid, but has a clearance height above the ground, which is higher than the height shown in Fig.1b shown height of the advanced and lowered position of the lifting surface 3 of the lifting and moving device is in the first horizontally advanced position.

Fig.1a and b represent the lifting and moving device 1 before the object is picked up. It comprises a moving bolster 4 with rollers 5, each with a rotation axis 6 , and a chassis 7, whereby the rollers in the example shown only specify one direction of travel on the base 8 with respect to the moving bolster. The direction of travel preferably corresponds, as shown, to the direction of horizontal movement of the lifting device 10 in the chassis 7. A change in direction or stationary rotation of the lifting and moving device as a whole is possible by individually controlling the rollers, similar to a tracked vehicle.

The Fig.1a The raised lifting element 10 shown is in Fig.1b lowered onto the ground 8 .

A support 9 with an upwardly facing horizontal support surface is provided on or above the chassis, the support surface being arranged above the chassis. Furthermore, a lifting element 10 that can be moved vertically and/or horizontally between several positions by motor is integrated in the chassis. According to the invention, the lifting device comprises a lifting device 14 with at least the aforementioned upwardly facing horizontal lifting surface 3 on an exposed extremity 11 at the lower end of the lifting device and a carriage 16 on which the lifting device 14 is placed and guided vertically or vertically and horizontally linearly in the chassis 7 on a rail guide 19 , preferably in the direction of travel of the rollers. The rail guide optionally has bevels 20 at both ends on which the carriage can be guided not only vertically but also horizontally (see in particular Fig.4 ). This allows the carriage to be lowered before the lifting element reaches its respective horizontal end position (front, see Fig.1a up to 3 , rear cf. Fig.4 to 6 ) up to placing the carriage and/or the lifting element on a base on the ground.

The extremity 11 of the lifting device is flanked by two support elements 13, which are preferably rigidly connected to the carriage 16. The support elements also serve to mechanically protect the middle vertically movable extremity 11 and thus also the lifting element 14 from unwanted impacts.

The lifting device 14 with at least the aforementioned upwardly facing horizontal lifting surface 3 on an exposed extremity 11 further comprises a preferably vertically acting lifting mechanism 15. If an object is to be lifted simultaneously by several lifting and moving devices arranged around it, it is advantageous if each of the lifting elements acting on it carries out a vertically upwardly directed lift. In this respect, it is proposed that the lifting mechanism is designed exclusively for a vertically directed lifting movement. In the example, the lifting mechanism comprises a vertically acting actuating element, preferably a threaded spindle drive or a hydraulic piston drive, and preferably additional guide means such as an exemplary scissor-grid guide arrangement with two scissor-grids 17 on both sides of the actuating element 18 (highlighted in Fig.3 ).

According to the invention, the aforementioned lifting device 14 and/or the carriage 16 also has a horizontally flat or statically determinable base pointing downwards. According to the invention, the base projects downwards beyond the chassis. Alternatively, it is further preferably proposed that the base can be lowered to a position below the chassis. In particular, the aforementioned lowering advantageously allows the aforementioned extremity 11 and the support feet 13 to be moved as close as possible to the ground 8 and the reduce the required clearance height under the object 2 to be picked up to a minimum. If the lifting device and/or the carriage is moved so far towards the ground until the base rests on the ground, the rollers are relieved when the load is lifted by the lifting device. The load is transferred to the ground directly via the support surface and not via the chassis and the rollers. On the other hand, the support feet 13 positioned under the load on the lifting surface 3 rest directly on the ground 8 , which in turn prevents the lifting and moving device from tipping over towards the load (see. Fig.3 ).

The lifting element 10 preferably has fixing or friction elements for the object to prevent it from slipping on the lifting surface, in the example shown preferably a rubber coating on the lifting surface 3. As shown, the lifting element 10 also has a vertical counter-bearing surface 12 adjoining the horizontal lifting surface 3. It is preferably aligned perpendicular to the lifting surface and, after the object 2 has been pushed onto the lifting surface 11, lies directly against the object and thus advantageously prevents the travel bolster 4 from tipping towards the object.

In the example, the support surface of the support 9 is flat and can only be rotated, preferably passively, about an axis that runs orthogonally through the support surface. The support surface is also preferably arranged horizontally or parallel to the base 8 or can be pivoted, for example via an arrangement on a spherical pivot bearing (eg ball socket bearing), which advantageously also enables rotation.

The lifting and moving device is also characterized in that the lifting element can be moved horizontally or, as previously shown, horizontally and vertically in the travel direction between at least two setting positions, which are shown in the figures .

Fig.1a , b and 2 show the lifting and moving device 1 in a first horizontally advanced position, the lifting surface 3 is in front of the chassis 7 and below the underride height. Fig.1b shows this first position with the extremities and support elements lowered to the ground. In Fig.2 object 2 is on the lifting surface.

This is followed by an intermediate position according to Fig.3 , in which the object on the lifting surface 3 was lifted vertically by the lifting device 14 , but not transported horizontally over the chassis, with the lifting device resting on the ground.

The second horizontally retracted position, in which the lifting surface 3 with the object is positioned above the chassis 7 above the support 9 , shows Fig.4 to 6 . First, the lifting surface with the object is positioned above the support ( Fig.4 ). The object is then lowered by the lifting device until the object rests only on the support ( Fig.5 ). In order to be able to maneuver the object on the support with the lifting and moving device, the lifting device must be retracted into the chassis ( Fig.6 ).

List of reference symbols:

1

Lifting and moving device

2

Object

3

Lifting surface

4

Travelling bolster

5

role

6

Rotation axis

7

chassis

8

Underground

9

Edition

10

Lifting element

11

extremity

12

Counter bearing surface

13

Support element

14

Lifting device

15

Lifting mechanism

16

Sleds

17

Folding gate

18

Actuator

19

Rail guidance

20

Slope

Claims (14)

1. Lifting and transporting device (1) for lifting and transporting objects (2) with low ground clearance over a ground surface (8), comprising

   a) a transport stool (4) with rollers (5), in each case with a rotation axis (6) and a chassis (7), wherein the rollers predetermine at least one transport direction on the ground surface,

   b) a support element (9) on or above the chassis, and

   c) a motor-driven lifting element (10) integrated into the chassis and movable vertically and/or horizontally between several setting positions, with at least one horizontal lifting surface (3) facing upwards on an exposed extremity (11) at the lower end,
   wherein

   d) in a first horizontally advanced setting position, the lifting surface can be positioned in front of or next to the chassis and beneath the ground clearance space, and

   e) in a second horizontally retracted setting position, the lifting surface can be positioned over the chassis above the support element,
   characterised in that

   f) the lifting element (10) comprises a lifting device (14) for the vertical transport movement of the horizontal lifting surface (3) facing upwards, on an exposed extremity (11) at the lower end of the chassis (7), and

   g) the lifting device (14) is arranged on a carriage (16) guided horizontally in a rail guide (19), wherein the lifting device (14) and/or the carriage (16) comprise a stand surface facing downwards, and in this situation the stand surface projects downwards over the chassis (7) or can be lowered onto a position beneath the chassis.
2. Lifting and transport device according to claim 1, characterised in that the rollers (5) are in each case arranged preferably in groups above their rotation axis (6) at the chassis (7) in their vertical position, and in each case movable vertically between at least one lower extended position and an upper retracted position, wherein a roller in the lower position projects over the chassis downwards as far as the ground surface (8) and in the upper position does not project downwards.
3. Lifting and transport device according to claim 2, characterised in that the rollers (5) are subdivided into roller groups, wherein vertical projection straight lines of the rotation axes (6) of the rollers of each roller group are arranged parallel to one another on the ground surface, and in each case predetermine a transport direction orthogonally to the rotation axes.
4. Lifting and transport device according to claim 2 or 3, characterised in that all the rollers (5) extended in the lower positions are in contact with the ground surface (8).
5. Lifting and transport device according to any one of the preceding claims, characterised in that at least one roller (5) is a ball roller.
6. Lifting and transport device according to any one of the preceding claims, characterised in that at least a part of the rollers (5) of the transport stool (4) can be driven by a motor, preferably individually or as a unit in a roller group.
7. Lifting and transport device according to any one of the preceding claims, characterised in that the rollers (5) or a part of the rollers are mounted such as to pivot about at least one axis which is not equal to the rotation axis (6).
8. Lifting and transport device according to any one of the preceding claims, characterised in that the support element (9) comprises a support surface which can preferably be rotated and/or pivoted, wherein the support surface can preferably be rotated flat and only about one axis, which runs orthogonally through the support surface and is preferably arranged horizontally or parallel to the ground surface (8).
9. Lifting and transport device according to any one of the preceding claims, characterised in that the lifting element (10) can be transported by a motor horizontally or horizontally and vertically in the transport direction between several setting positions.
10. Lifting and transport device according to any one of the preceding claims, characterised in that the lifting element (10) can be transported in the chassis (7) on a rail guide (19), and in this situation preferably comprises a carriage (16) guided in the rail guide (19).
11. Lifting and transport device according to any one of the preceding claims, characterised in that the lifting device (14) is arranged on a carriage (16), which is guided in a rail guide (19) not only horizontally but also vertically with oblique elements (20) on the end sides.
12. Lifting and transport device according to any one of the preceding claims, characterised in that the at least one horizontal lifting surface (3), facing upwards, comprises fixing elements or friction elements for the object in order to prevent sliding on the lifting surface.
13. Lifting and transport device according to any one of the preceding claims, characterised in that the horizontal lifting surface (3) is delimited by a vertical counter-bearing surface (12).
14. Lifting and transport device according to any one of the preceding claims, characterised in that the extremity (11) of the lifting device is flanked by two support elements (13), which can preferably be lowered as far as the ground surface (8).

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