Roller with lifting function

Abstract

Roller (1), comprising at least one wheel (3, 5) rotatable about at least one rolling axis (R) and rolling on a support structure (17) and at least one actuating device (9), wherein by means of a rotation of the actuating device (9) about an actuating axis (B) extending parallel to the rolling axis (R), at least one support element (11, 13) can be brought into at least one first position spaced apart from the support structure (17), and into at least one second position in which the support element (11, 13) is in contact with the support structure (17), characterized in that the actuating device (9) and the support element (11, 13) are configured such that the wheel (3, 5) is lifted off the support structure (17) in the second position.

Description

[0001] The present invention relates to a roller comprising at least one wheel rotatable about at least one rolling axis and rolling on a support structure and at least one actuating device, wherein at least one support element can be brought into at least one position spaced apart from the support structure by means of a rotation of the actuating device about an actuating axis running parallel to the rolling axis, and into at least one second position in which the support element is in contact with the support structure.

[0002] For various objects, especially equipment such as medical devices (e.g., treatment instruments) and / or storage units like tables, it is desirable that these objects can be easily moved from one location to another. Therefore, these objects are often mounted on casters that provide this mobility.

[0003] On the other hand, it is desirable, if not necessary, for objects to remain stationary and stable at a desired location, meaning they should have a firm footing and high positional accuracy. This applies, for example, to robotics applications. For such applications, high stability is therefore essential, even under external influences.

[0004] In the past, it was proposed to achieve positional accuracy by braking the rollers, releasing the brakes to initiate movement of the object, and then reactivating them at the desired location to restore positional accuracy. This method thus relies on wheel locking.

[0005] However, the resulting stability is rather low, as external influences, such as mechanical forces acting on the object, can overcome the braking force, and / or, for example, with rollers that have a leading or trailing motion, movement of the object due to swiveling movements of the roller cannot be completely ruled out. Even if such swiveling movement is prevented by a suitable locking device, such as a slewing ring lock (also known as a total lock when combined with a wheel lock), movement of the object can still occur. Due to technological and functional tolerances, these locking mechanisms cannot be implemented without play, which in turn negatively affects stability and renders it insufficient for certain applications.Furthermore, the static friction between the roller and the supporting structure, such as the floor covering on which the roller rests, can be overcome relatively easily, thus causing an undesirable movement of the object.

[0006] Furthermore, WO2023 / 275641A1 proposed that the stability of an object could be achieved by using a swivel caster locking device in a caster of the type, whereby actuating a swivel caster lock brings the caster into contact with the ground to increase friction between the caster and the ground. However, such a locking device also does not provide sufficient stability under external (mechanical) influences.

[0007] Furthermore, lifting devices separate from a roller were proposed in the prior art, for example in CN 220 817 330 U. With these, one foot of the object is lowered to the ground and then extended further to lift the object's rollers from the ground, in particular to adjust their height.

[0008] Prior art has also proposed so-called lifting casters in which a corresponding foot is integrated into the caster, at least partially. For example, CN 219 427 843 U and CN 110 242 827 A disclose casters in which a lifting function for changing the height of the caster is integrated, at least partially, into the caster but separate from a wheel. These embodiments, however, are limited to sheet steel casters, i.e., casters in which a wheel is arranged in a sheet steel housing. The caster can be lowered or raised by means of an actuating device, such as a lever or a screw. This protects the caster from static loads.

[0009] However, such a lifting roller does not meet the increased demands for appearance and design required in certain industries, such as the medical sector. To meet these requirements, plastic rollers are primarily used.

[0010] It is therefore an object of the present invention to further develop the rollers known from the prior art, in particular those of the generic type, in such a way as to overcome the disadvantages of the prior art, in particular to provide a roller with which a high stability, positional accuracy and stability of an object carried by the roller can be achieved and at the same time an appealing appearance and design of the roller is provided.

[0011] This problem is solved by a roller comprising at least one wheel rotatable about at least one rolling axis and rolling on a support structure and at least one actuating device, wherein by means of a rotation of the actuating device about an actuating axis running parallel to the rolling axis, at least one support element can be brought into at least one first position spaced away from the support structure, and into at least one second position in which the support element is in contact with the support structure, wherein furthermore the actuating device and the support element are configured such that the wheel is lifted off the support structure in the second position.

[0012] It is preferred that the actuation axis is identical to the roll axis.

[0013] It is also proposed that the roller further comprises at least one support element, wherein in particular the rolling axis is defined by the support element and / or the support element comprises at least one fork or at least one support element.

[0014] It is particularly preferred that the supporting element, in particular on an object supported by the roller, is rotatably mounted about at least one pivot axis, wherein in particular the pivot axis runs perpendicular to the rolling axis.

[0015] Alternatively or additionally, it may be provided that the roller has a lead and / or trail and / or that the pivot axis and the roll axis are perpendicular and / or skew to each other.

[0016] Alternatively or additionally, a roller can be characterized by the fact that the pivot axis and the roll axis intersect.

[0017] Furthermore, it is proposed that the roller be designed as a swivel roller, in particular that the supporting element be fixed to the object in a rotationally secure manner.

[0018] A roller can also be characterized by the fact that at least two, preferably a plurality, of wheels are provided, in particular at least two wheels are attached to the support element, preferably at least two wheels are arranged in the fork and / or at least two wheels are arranged on opposite sides of the support element.

[0019] It is also preferred that the support element extends, in particular along the rolling axis, over the width of the wheel, the wheels and / or at least one of the wheels and / or that the support element is configured in such a way that it acts as a cable deflector.

[0020] Furthermore, it is proposed that a multiple support elements be provided.

[0021] It is preferred that a first contact point of a first support element with the supporting structure is located in front of a contact point of the wheel with the supporting structure and / or a plane spanned by a normal direction of the supporting structure and the rolling axis with respect to the rolling axis and / or a rolling direction of the wheel, and / or that a second contact point of a second support element with the supporting structure is located behind a contact point of the wheel with the supporting structure and / or the plane spanned by the normal direction of the supporting structure and the rolling axis with respect to the rolling axis and / or a rolling direction of the wheel, in particular that the second contact point is located on the opposite side of the contact point of the wheel with the supporting structure and / or the rolling axis with respect to the first contact point.

[0022] It is also proposed that at least a first support element with respect to the rolling axis is arranged on a first side of the wheel and / or at least one of the wheels and / or on a first side of the support element, in particular the fork and / or the support element, and / or that at least a second support element with respect to the rolling axis is arranged on a second side of the wheel and / or the at least one wheel and / or the support element, in particular the fork and / or the support element, facing away from the first side of the wheel and / or the at least one wheel and / or the support element, in particular the fork and / or the support element.

[0023] In the aforementioned embodiment, it can be provided that the first support element and / or the second support element is movable along a direction of movement that is perpendicular to the rolling axis and / or parallel to a normal direction of the surface of the support structure, in particular between the first position and the second position, and / or that a contact point of the first support element and / or the second support element, in particular in the second position, is laterally offset with respect to the rolling axis from a contact point of the wheel with the support structure.

[0024] It is also proposed that the roller comprises a plurality of first support elements and / or a plurality of second support elements, in particular comprising at least one pair of first support elements and / or one pair of second support elements, wherein preferably a first contact point of a first first support element and / or a first second support element with the supporting structure is located in front of a contact point of the wheel with the supporting structure with respect to the rolling axis and / or a rolling direction of the wheel and / or a second contact point of a second first support element and / or a second second support element with the supporting structure is located behind a contact point of the wheel with the supporting structure with respect to the rolling axis and / or a rolling direction of the wheel, in particular the second contact point is located on an opposite side of the contact point of the wheel with the supporting structure and / or the rolling axis with respect to the first contact point.

[0025] Furthermore, it is preferred that a movement of the support element and / or at least one support element, in particular the first support element and / or the second support element from the first position to the second position and / or from the second position to the first position, comprises at least a longitudinal movement of the support element, or at least a part of the support element.

[0026] It is also proposed that a movement of the support element and / or at least one support element, in particular the first support element and / or the second support element, from the first position to the second position and / or from the second position to the first position of at least one part of the support element, includes at least one rotational movement.

[0027] Furthermore, a roller can be characterized by at least one gear element, wherein a movement of the actuating device can be transmitted to the support element, at least one of the support elements, in particular the first support element and / or the second support element, and / or at least two support elements by means of the gear element.

[0028] It is proposed that the gear element comprises at least one cam and / or elongated hole formed in the actuating device, wherein at least one pin is connected and / or operatively connected to the support element and / or at least two support elements, in particular the first support element and the second support element, and / or the first first support element and the second first support element or the first second support element and the second second support element, preferably a plurality of pins, in particular connected and / or operatively connected to different support elements, project into the cam and / or the elongated hole.

[0029] Furthermore, the invention may provide that the support element is rotatable about an axis of rotation, in particular one which is supported on the support element, in particular that the first support element and / or the first first support element or the first second support element is rotatable about a first axis of rotation, and that the second support element and / or the second first support element or the second second support element is rotatable about a second axis of rotation, wherein preferably the first axis of rotation and the second axis of rotation run parallel and / or are arranged on opposite sides of a connecting line of the rolling axis with the support structure, in particular the point of contact of the wheel with the support structure.

[0030] Alternatively or additionally, it can be provided that the cam and / or the slot runs inclined in such a way that the distance to the actuating axis and / or the rolling axis changes along the cam and / or the slot, in particular increasing or decreasing continuously.

[0031] Furthermore, it is preferred that the support element, at least one support element of the plurality of support elements and / or the plurality of support elements, the actuating device and / or the gear element, in particular the cam and / or the slot, is / are configured such that the support element, at least one support element of the plurality of support elements and / or the plurality of support elements can / are locked at least in the first position and / or the second position, in particular by means of at least one locking device.

[0032] It is particularly proposed that the locking device enables at least a latching, at least a kneeing, at least a clipping, at least a positive locking and / or at least a frictional locking and / or that the actuating device, the support element, at least one support element of the plurality of support elements (11,13), the plurality of support elements, the gear element, the cam and / or the slot at least partially comprises.

[0033] It is also preferred that at least one first locking and / or braking device is provided for the wheel, preferably for locking the wheel around the rolling axis, optionally relative to the support element, wherein optionally the first locking and / or braking device can be actuated via the actuating device or a separate first actuator element.

[0034] Furthermore, a roller can be characterized in that at least a second locking and / or braking device is provided for the support element, preferably for locking the support element around the pivot axis, optionally relative to the object and / or in the form of at least one slewing ring locking device, wherein optionally the second locking and / or braking device can be actuated via the actuating device or a separate second actuator element.

[0035] Finally, it is proposed that the object includes at least one cart, at least one transport vehicle, at least one forklift, at least one pallet truck, at least one apparatus, at least one medical apparatus, at least one storage unit, at least one table and / or at least one chair.

[0036] The invention is thus based on the surprising insight that the integration of a lifting function into a roller is made possible by utilizing the adjustment range around an actuating axis, which runs parallel to a rolling axis of a wheel of the roller, to allow movement of a support element to such an extent that at least one wheel of the roller is lifted from a supporting structure, such as a floor or surface. This allows for an attractive appearance, since the lifting mechanism can be integrated into the roller in such a way that it is covered by the wheel and / or a supporting element of the roller, and the geometric protrusion caused by the actuating device can also be limited.

[0037] By providing the possibility of raising the wheel of the roller, a high level of stability can be achieved, in particular the static friction between the support element and the supporting structure can be chosen to be higher than between the wheel and the supporting structure.

[0038] The invention can be implemented in various types of casters, for example fixed casters, swivel casters, casters with and without forward / rear casters, single casters (i.e., casters with one wheel), double casters (i.e., casters with two wheels), plastic casters and / or metal casters.

[0039] Double rollers, in particular, offer the advantage that the lifting mechanism can be easily concealed, especially in an area of ​​the wheels that provides a cavity or undercut.

[0040] Stability and positional accuracy can be further increased, in particular, by providing multiple support elements. This also leads to increased stability of the roller when the wheel is lifted from the supporting structure. Support elements can be provided on each side of the wheel(s) or the supporting structure with respect to the rolling axis, with a first support element on one side and a second support element on the opposite side. This results in symmetrical support of the roller on both sides. Furthermore, multiple support elements can be provided on each side to achieve symmetrical support of the roller not only along the rolling axis but also in a direction perpendicular to the rolling axis and perpendicular to a normal direction of the supporting structure.

[0041] The use of a gear element makes it possible to convert a movement of the actuating device into a movement of the support element(s) in such a way that a reduction or translation can be provided and / or different forms of movement, such as pivoting movement, longitudinal movement and / or rotary movement of the actuating device on the one hand and the support element on the other, can be converted into one another.

[0042] A combination of the lifting function with a wheel locking mechanism and / or a slewing ring locking mechanism can also be provided. The lifting function and the wheel locking mechanism and / or slewing ring locking mechanism can optionally be actuated via a common operating device, or the wheel locking mechanism and / or the slewing ring locking mechanism can be actuated independently of the lifting function or independently of each other via separate actuator elements. This allows the most suitable locking method to be used depending on the application, particularly to ensure the necessary stability and to reduce effects that could affect stability, such as movement of the roller when raised.

[0043] Further features and advantages of the invention will become apparent from the following description, in which preferred embodiments of the invention are explained with reference to exemplary figures.

[0044] This shows: Fig. 1 a perspective view of a roller according to the invention in the form of a double roller; Fig. 2a a side view of the role of Fig. 1 in one of the first positions of the support elements corresponding to the position of the actuating device; Fig. 2b a side view of the role of Fig. 2a in one of the second positions of the support elements corresponding to the position of the actuating device; Fig. 3a a schematic side view of the roll in the in Fig. 2a position shown with supporting structure shown; Fig. 3b a schematic side view of the roll in the in Fig. 2b position shown with supporting structure shown; and Fig. 4 a schematic cross-sectional view of the role of the Fig. 1 to 3b to illustrate the gear element.

[0045] Fig. Figure 1 shows a perspective view of a roller 1. The roller 1 is designed as a double roller, specifically a plastic double roller. The roller 1 comprises a first wheel 3 and a second wheel 5. The wheels 3 and 5 are rotatably mounted on a support element 7 about a rolling axis R. The support element 7 is pivotally mounted about a pivot axis S on an object (not shown), such as a medical device, to support the device. The pivot axis S and the rolling axis R are perpendicular to each other, but skew, so that the roller 1 exhibits a lead / lag.

[0046] According to the invention, the roller 1 has a control device 9 in the form of a (foot) lever. This control device 9 is rotatable about an actuating axis B, which is identical to the rolling axis R. As explained below, movement of the control device 9 enables movement of support elements 11, 13. In the roller 1, the support elements 11, 13 extend over the entire width of the roller 1 or the wheels 3, 5 along the rolling axis R.

[0047] In the Fig. 2a and Fig. Figure 2b shows the support elements 11, 13 and the actuating device 9 in different positions. Fig. Figure 1 shows a first position of the support elements 11, 13. In this position, the support elements are arranged close to the rolling axis R and the wheels 3, 5. If the actuating device 9 is removed from the Fig. 2a position shown in the Fig. When the support elements 11, 13 are moved to the position shown in 2b, they are moved to a second position. In this position, the distance of the support elements from the rolling axis R and the wheels 3, 5 is increased.

[0048] Again Fig. As can be seen from Figure 3a, in the first position of the support elements 11, 13, or the corresponding position of the actuating device, there is a contact point 15 between the wheels 3, 5 and a supporting structure 17 in the form of a base. The support elements 11, 13 are spaced away from the surface of the supporting structure. In this position of the support elements, the object can be moved by means of the roller 1.

[0049] In contrast, in the second position of the support elements 11, 13, a first contact point 19 of the first support element 11 and a second contact point 21 of the second support element 13 are each present with the supporting structure 17. The wheels 3, 5 are spaced a distance x from the supporting structure 17. In comparison to the one in Fig. In the configuration of roller 1 shown in Figure 3a with the support elements 11, 13 in the first position, in the configuration of roller 1 with the support elements 11, 13 in the second position the entire roller 1 is raised by the distance x.

[0050] Furthermore, in the Fig. 3a and Fig. 3b to recognize that the first contact point 19 of the first support element 11 is located in front of the contact point 15 with respect to a normal direction N of the supporting structure through the roll axis R, while the second contact point 21 of the second support element 13 is located on the opposite side of the contact point 15 with respect to the normal direction of the supporting structure through the roll axis R.

[0051] In Fig. Figure 4 shows a cross-sectional view of roll 1. As the Fig. As can be seen from Figure 4, the rolling axis R is identical to the actuating axis B of the actuating device 9. Furthermore, it can be seen that the rolling axis R and the actuating axis B are arranged on a support element 23 of the support element 7. The actuating device 9, which is rotatable about the actuating axis B and designed as a lever, is mechanically connected to the support elements 11, 13 via a gear element 25. For this purpose, the gear element 25 has a cam or elongated hole 27 formed in the actuating device 9. A pin 29, which is operatively connected to the support elements 11, 13, extends into the elongated hole 27. The support elements 11, 13 are each rotatably mounted on the support element via rotation axes 31, 33, with the first support element 11 being rotatable about the first rotation axis 31 and the second support element 13 being rotatable about the second rotation axis 33.

[0052] The elongated hole 27 runs inclined in the actuating device 9 such that the distance to the axis of rotation R or the actuating axis B is varied along the length of the elongated hole. In the Fig. 4. The support elements 11 and 13 are in their respective first positions. If the actuating device is now turned counterclockwise in one direction... Fig. As the pin 29 is rotated about the actuating axis B, the distance between the pin 29 and the actuating axis B increases. This causes the pin 29 to move in Fig. 4 downwards. Due to the operative connection of the pin 29 with the support elements 11, 13, these are rotated about the axes of rotation 31, 33, in particular in opposite directions. In this optional specific embodiment, the first support element 11 is thereby in Fig. 4 rotates counterclockwise around the first axis of rotation 31, while the second support element 13 in Fig. 4 is rotated clockwise around the second axis of rotation 33.

[0053] This places the support elements 11, 13 into the Fig. 2b and Fig. 3b shown second positions transferred.

[0054] It is particularly preferred that the gear element 25 forms a locking device. A suitable shape of the elongated hole 27, particularly in combination with the positioning of the rotation axes 31, 33, especially relative to the actuating axis or the geometric design of the support elements 11, 13, enables the support elements 11, 13 to be locked in the second position. This is preferably achieved by interlocking the support elements 11, 13 or by forming a recess in the elongated hole 27. Alternatively, another locking mechanism and / or a locking mechanism in the first position may also be provided.

[0055] Although a mechanical connection between the actuating device and the support element was previously described, the invention is not limited to this. Thus, the transmission of movement from the actuating device to the support element can also be hydraulic, pneumatic, electrical, and / or magnetic.

[0056] Furthermore, the support elements can also be designed to function as cable deflectors in the first position. This is particularly the case for the [missing information]. Fig. 1 support elements shown. Reference symbol list 1 roll 3-wheeler 5 wheels 7 Supporting element 9 Actuating device 11 Support element 13 Support element 15 Point of contact 17 Supporting structure 19 Contact Point 21 Contact point 23 Support element 25 Gear element 27 Slotted hole 29 pens 31 Rotation axis 33 Rotation axis R Roll axis S swivel axis B Actuating axis N Normal direction x distance QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2023 / 275641A1

[0006] CN 220 817 330 U

[0007] CN 219 427 843 U

[0008] CN 110 242 827 A

[0008]

Claims

[1] Roller (1) comprising at least one wheel (3, 5) rotatable about at least one rolling axis (R) and rolling on a support structure (17) and at least one actuating device (9), wherein at least one support element (11, 13) can be brought into at least one first position spaced apart from the support structure (17) by means of a rotation of the actuating device (9) about an actuating axis (B) extending parallel to the rolling axis (R), and into at least one second position in which the support element (11, 13) is in contact with the support structure (17), characterized by , that the actuating device (9) and the support element (11, 13) are configured such that the wheel (3, 5) is lifted off the support structure (17) in the second position. [2] Roller according to claim 1, characterized by , that the actuation axis (B) is identical to the roll axis (R). [3] Roller according to claim 1 or 2, characterized bythat the roller (1) further comprises at least one support element (7), wherein in particular the rolling axis (R) is defined by the support element (7) and / or the support element (7) comprises at least one fork or at least one support element (23). [4] Roller according to claim 3, characterized by , that the supporting element (7), in particular on an object supported by the roller (1), is rotatably mounted about at least one pivot axis (S), wherein in particular the pivot axis (S) is perpendicular to the rolling axis (R). [5] Roller according to claim 4, characterized by , that the roller (1) has a lead and / or trail and / or the pivot axis (S) and the roll axis (R) are perpendicular and / or skew to each other. [6] Roller according to claim 4, characterized by , that the pivot axis (S) and the roll axis (R) intersect. [7] Roller according to one of claims 1 to 3, characterized bythat the roller is designed as a swivel roller, in particular that the supporting element is fixed to the object in a rotationally secure manner. [8] Role according to one of the preceding claims, characterized by , that at least two, preferably a plurality, of wheels (3, 5) are provided, in particular at least two wheels (3, 5) are attached to the support element (7), preferably at least two wheels are arranged in the fork and / or at least two wheels (3, 5) are arranged on opposite sides of the support element (23). [9] Role according to one of the preceding claims, characterized by , that the support element (11, 13), in particular along the roll axis (R), extends over the width of the wheel, the wheels (3, 5) and / or at least one of the wheels and / or the support element (11, 13) is configured such that it acts as a cable deflector. [10] Role according to one of the preceding claims, characterized by, that a plurality of support elements (11, 13) are provided. [11] Roller according to claim 10, characterized by, that a first contact point (19) of a first support element (11) with the support structure (17) with respect to the roll axis (R) and / or a rolling direction of the wheel (3, 5) is located in front of a contact point (15) of the wheel (3, 5) with the support structure (17) and / or a plane spanned by a normal direction (N) of the support structure (17) and the roll axis (R), and / or a second contact point (21) of a second support element (13) with the support structure (17) with respect to the roll axis (R) and / or a rolling direction of the wheel (3, 5) is located behind a contact point (15) of the wheel (3, 5) with the support structure (17) and / or the plane spanned by the normal direction (N) of the support structure (17) and the roll axis (R), in particular the second contact point (21) with respect to the first contact point (19) is on an opposite side of the The point of contact (15) of the wheel (3,5) with the supporting structure (17) and / or the rolling axis (R) is located. [12] Roller according to claim 10, characterized by, that at least a first support element is arranged with respect to the rolling axis on a first side of the wheel and / or at least one of the wheels and / or on a first side of the support element, in particular the fork and / or the support element, and / or that at least a second support element is arranged with respect to the rolling axis on a second side of the wheel and / or the at least one wheel and / or the support element, in particular the fork and / or the support element, facing away from the first side of the wheel and / or the at least one wheel and / or the support element, in particular the fork and / or the support element. [13] Roller according to claim 12, characterized bythat the first support element and / or the second support element is movable along a direction of movement that is perpendicular to the rolling axis and / or parallel to a normal direction of the surface of the supporting structure, in particular between the first position and the second position, and / or that a contact point of the first support element and / or the second support element, in particular in the second position, is laterally offset with respect to the rolling axis from a point of contact of the wheel with the supporting structure. [14] Roller according to one of claims 11 to 13, characterized bythat the roller comprises a plurality of first support elements and / or a plurality of second support elements, in particular comprising at least one pair of first support elements and / or one pair of second support elements, wherein preferably a first contact point of a first first support element and / or a first second support element with the supporting structure is located in front of a contact point of the wheel with the supporting structure with respect to the rolling axis and / or a rolling direction of the wheel and / or a second contact point of a second first support element and / or a second second support element with the supporting structure is located behind a contact point of the wheel with the supporting structure with respect to the rolling axis and / or a rolling direction of the wheel, in particular the second contact point is located on an opposite side of the contact point of the wheel with the supporting structure and / or the rolling axis with respect to the first contact point. [15] Role according to one of the preceding claims, characterized by , that a movement of the support element and / or at least one support element, in particular the first support element and / or the second support element from the first position to the second position and / or from the second position to the first position includes at least a longitudinal movement of the support element, or at least a part of the support element. [16] Role according to one of the preceding claims, characterized by , that a movement of the support element (11, 13) and / or at least one support element, in particular the first support element (11) and / or the second support element (13) from the first position to the second position and / or from the second position to the first position of at least one part of the support element includes at least one rotational movement. [17] Role according to one of the preceding claims, characterized byat least one gear element (25), wherein a movement of the actuating device (9) can be transmitted to the support element, at least one of the support elements, in particular the first support element (11) and / or the second support element (13), and / or at least two support elements (11, 13) by means of the gear element (27). [18] Roller according to claim 17, characterized by , that the gear element (25) comprises at least one cam and / or elongated hole (27) formed in the actuating device (9), wherein at least one pin (29) is connected and / or operatively connected with the support element and / or at least two support elements, in particular the first support element (11) and the second support element (13), and / or the first first support element and the second first support element or the first second support element and the second second support element, preferably a plurality of pins, in particular connected and / or operatively connected with different support elements, project into the cam and / or the elongated hole (27). [19] Roller according to claim 17 or 18, characterized bythat the support element is rotatable about an axis of rotation, in particular one which is supported on the support element, in particular the first support element (11) and / or the first first support element or the first second support element is rotatable about a first axis of rotation (31), and the second support element (13) and / or the second first support element or the second second support element is rotatable about a second axis of rotation (33), wherein preferably the first axis of rotation (31) and the second axis of rotation (33) run parallel and / or are arranged on opposite sides of a connecting line of the rolling axis (R) with the support structure (17), in particular the point of contact (15) of the wheel (3, 5) with the support structure (17). [20] Roller according to claim 18 or 19, characterized by, that the cam and / or the slot (27) is inclined in such a way that the distance to the actuating axis (B) and / or the roll axis (R) changes along the cam and / or the slot (27), in particular increasing or decreasing continuously. [21] Role according to one of the preceding claims, characterized by , that the support element (11, 13), at least one support element of the plurality of support elements (11, 13) and / or the plurality of support elements, the actuating device and / or the gear element, in particular the cam and / or the slot, is / are configured such that the support element (11, 13), at least one support element of the plurality of support elements (11, 13) and / or the plurality of support elements can be locked at least in the first position and / or the second position, in particular by means of at least one locking device. [22] Roller according to claim 21, characterized by, that the locking device enables at least a latching, at least a kneeing, at least a clipping, at least a positive locking and / or at least a frictional locking and / or the actuating device, the support element, at least one support element of the plurality of support elements (11,13), the plurality of support elements, the gear element, the cam and / or the slot at least partially comprises. [23] Role according to one of the preceding claims, characterized by , that at least one first locking and / or braking device is provided for the wheel, preferably for locking the wheel around the rolling axis, optionally relative to the support element, wherein optionally the first locking and / or braking device can be actuated via the actuating device or a separate first actuator element. [24] Roller according to any one of claims 3 to 23, characterized by, that at least a second locking and / or braking device is provided for the support element, preferably for locking the support element around the pivot axis, optionally relative to the object and / or in the form of at least one slewing ring locking device, wherein optionally the second locking and / or braking device can be actuated via the actuating device or a separate second actuator element. [25] Role according to one of the preceding claims, characterized by that the object includes at least one cart, at least one transport vehicle, at least one forklift, at least one pallet truck, at least one apparatus, at least one medical apparatus, at least one storage unit, at least one table and / or at least one chair.

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