TRANSPORT SYSTEM AND TRANSPORT DEVICE

Description

[0001] The present invention relates to a transport system and a transport device for a transport system.

[0002] The German priority application DE 10 2018 116 992.2 also describes a transport system and a transport device for a transport system.

[0003] Transport devices comprising a plurality of rollers and contacting a curved guide rail of a transport system via the rollers are already known, among other things, from EP 2 838 821 B1. EP 2 838 821 B1 discloses a transport device comprising a plurality of symmetrically constructed movable carriages guided on a revolving guide rail. Each symmetrical carriage half comprises three rollers arranged in a triangular arrangement, with two rollers resting on a first running surface and a third roller resting on a second running surface.

[0004] To ensure that the rollers always maintain sufficient contact with the guide rail, a certain force is required to ensure the rollers' contact pressure against the guide rail's running surfaces. The force for pressing the rollers is distributed evenly between the two running surfaces of the guide rail. In a triangular roller arrangement such as that shown in EP 2 838 821 B1, the individual roller that rests on the second running surface must withstand the same force as the two rollers that rest on the first running surface. Thus, the individual roller always represents the weak point of the arrangement and is the first to be damaged in the event of an overload.

[0005] To reduce wear, the individual roller in the triangular roller arrangement can be designed with a significantly larger diameter than the other two rollers. A larger diameter provides a larger contact surface for the force, allowing the individual roller to last longer. A disadvantage of this design, however, is that the dimensions of the transport device increase due to the unequal roller diameters.

[0006] However, if there is not enough space available to design the transport device with a single roller with an enlarged diameter, two rollers can be used per running surface for improved force distribution. The rollers can be arranged in a square shape and have the same roller diameter. Under ideal conditions, the force required to press the rollers together is then distributed evenly between each roller in this type of arrangement. At the transition from a straight section of the track to a curved section, the problem with this type of roller arrangement is that the first roller on the inside of the curve loses contact with the running surface of the track, causing the transport device to lie unstably on the running surfaces of the track as it begins to tip over in this area.This happens regardless of the contour of the track when a straight section transitions to a curved track section due to the geometry.

[0007] A transport system and a transport device with the features of the generic terms are known from document DE 10 2014 100636 A1. Other relevant documents for the characterizing parts are EP 0 636 561 A1, GB 2 158 404 A, DE 10 2014 110714 A1, WO 00 / 64751 A1, and WO 2018 / 145214 A1.

[0008] The object of the present invention is to provide an improved transport system and an improved transport device for a transport system with a robust arrangement of rollers in which wear is reduced.

[0009] This object is achieved by the features of the independent claims. Further advantageous embodiments of the invention are specified in the dependent claims.

[0010] According to the invention, a transport system with a curved guide rail having a first and second running surface on a guide rail side flank and comprising at least one transport device is proposed. The transport device is guided in a running direction along the guide rail and has a plurality of rollers for guidance, each of which is rotatably mounted about its own axis of rotation. A first and second roller of the transport device form a first roller unit for rolling on the first running surface. A third and fourth roller of the transport device form a second roller unit for rolling on the second running surface. The first and second roller units are connected via a first carrier device which is designed to pretension the first roller unit against the first running surface and the second roller unit against the second running surface. The first roller unit and / or the second roller unit has a pendulum unit.The pendulum unit has a rigid connection between the rotational axes of the first and second rollers of the first roller unit and / or a rigid connection between the rotational axes of the third and fourth rollers of the second roller unit and a pendulum axis, wherein the rigid connection is pivotally mounted about the pendulum axis. The pendulum axis is arranged transversely to the running direction of the first and second rollers of the first roller unit and / or the third and fourth rollers of the second roller unit, which has the pendulum unit.

[0011] With the help of the pendulum axle, the force required to press the rollers of the transport device onto the running surfaces of the guide rail is distributed evenly across both rollers of the roller unit that contains the pendulum unit.

[0012] This allows for consistent wear on both rollers. Furthermore, thanks to the pivoting bearings and the pendulum axle, the rollers always maintain ground contact with the running surfaces of the guide rail. The rollers of the roller unit, which includes the pendulum unit, continue to behave as a single roller thanks to the pendulum axle. This ensures reliable guidance of the transport device along the guide rail, even under highly dynamic conditions and in the area of ​​a curved guide rail.

[0013] In this context, it is possible for the first roller unit to have the pendulum unit with the pendulum axle. Furthermore, it is also conceivable for the second roller unit to include the pendulum unit with the pendulum axle. The first roller unit and the second roller unit can also each include a pendulum unit and a pendulum axle.

[0014] According to one embodiment, the guide rail of the transport system has a second guide rail side flank along the running direction. The transport device further comprises a third roller unit and a fourth roller unit that roll along the second guide rail side flank. A second support device connects the third roller unit and the fourth roller unit.

[0015] A fifth and sixth roller of the transport device can form the third roller unit. A seventh and eighth roller of the transport device can form the fourth roller unit. The third and fourth roller units are connected via the second support device, which is designed to preload the third roller unit against a third running surface and the fourth roller unit against a fourth running surface of the second guide rail side flank. The transport device can be implemented more stably on the guide rail due to the design with additional rollers on the second guide rail side flank. This also facilitates the guidance of the transport device on the guide rail of the transport system.

[0016] In a further embodiment, the guide rail of the transport system is designed symmetrically along the running direction, and the second guide rail side flank comprises a third running surface and a fourth running surface. The transport device is further designed symmetrically to the guide rail, with the third roller unit rolling on the third running surface and the fourth roller unit rolling on the fourth running surface. The third and fourth roller units are designed identically to the first and second roller units. All features and functional arrangements already described and described below with regard to the first roller unit and / or the second roller unit are thus transferable to the third roller unit and / or the fourth roller unit without the need for a separate description. Furthermore, the second carrier device can be designed identically to the first carrier device.

[0017] The third roller unit can have a pendulum unit that rigidly connects the axes of rotation of the fifth and sixth rollers of the third roller unit. Furthermore, the pendulum unit of the third roller unit can comprise a pendulum axis that pivotally supports the rigid connection of the axes of rotation of the fifth and sixth rollers. The pendulum axis can also be oriented transversely to the running direction of the fifth and sixth rollers of the third roller unit. Likewise, the first roller unit with the first and second rollers can have a similarly designed pendulum unit on the first guide rail side flank. Instead of the third roller unit, the fourth roller unit with the seventh and eighth rollers can have a pendulum unit as described above, which rigidly connects the axes of rotation of the seventh and eighth rollers and comprises a pendulum axis.Likewise, the third and fourth roller units can each have a pendulum unit, just as the first and second roller units can each have a pendulum unit. A symmetrical design of the guide rail of the transport system and the transport device simplifies construction and ensures optimized force distribution among the individual roller units. Furthermore, the symmetrical design of the transport device can provide improved ground contact of the roller units on curved guide rails.

[0018] In a further embodiment, the transport device has a coupling element that is designed in the shape of a bow. The coupling element is designed to connect the first support device and the second support device to one another. Using this arrangement, the preload of the rollers of the first and second roller units against the first and second running surfaces, as well as the preload of the rollers of the third and fourth roller units against the third and fourth running surfaces of the guide rail, can be easily implemented.

[0019] The preload of the rollers can be achieved through a process known as "overpressing," meaning the rollers of the roller units can be designed to be spaced further apart than the intended distance between the running surfaces, i.e., the width of the track. In this way, the rollers of the roller units are pressed against the running surfaces of the track. The force with which the rollers of the roller units are pressed against the running surfaces is distributed evenly between the running surfaces of the track and the number of rollers per running surface.

[0020] According to a further embodiment, the pendulum unit has a symmetrical design. The pendulum axis lies on a symmetry axis of the pendulum unit and is firmly connected to the first support device and / or the second support device of the transport device. The symmetrical design of the pendulum unit allows for a simplified construction of the transport device. Furthermore, the symmetrical design of the pendulum unit allows for savings in manufacturing costs and allows the force to be distributed evenly between the individual rollers, in particular between the two rollers of the pendulum unit.

[0021] In a further embodiment, the pendulum unit has bearing elements. The rigid connection of the pendulum unit is designed as a U-shaped connecting element. The first and second rollers of the first roller unit and / or the third and fourth rollers of the second roller unit are placed on ends of the U-shaped connecting element of the pendulum unit and fastened with a first and second fastening element. The arrangement thus forms a U-shaped body. The bearing elements also support the U-shaped body so that it can pivot about the pendulum axis. The bearing elements protect the pendulum axis, which can be designed as a bolt, for example, from damage when the U-shaped body moves about the pendulum axis.Additional bearing elements can be provided, for example, in the rollers of the first to fourth roller units to reduce frictional resistance as the rollers of the roller units move along the running surfaces of the guide rail. The bearing elements in the rollers and for the U-shaped body can be designed as roller bearings, for example. The use of plain bearings is also conceivable. Alternatively, a design of the pendulum unit without bearing elements for supporting the U-shaped body would also be possible.

[0022] According to a further embodiment, the first carrier device has a recess in which the pendulum unit sits with a precise fit. The first and second rollers of the first roller unit and / or the third and fourth rollers of the second roller unit protrude beyond the recess in the first carrier device when the pendulum unit is arranged in the recess. Due to the space-saving design, the transport device can be kept compact overall. It is therefore possible to easily integrate the transport device into existing transport systems that require little space, without having to undergo complicated redesign of the transport system. Furthermore, the second carrier device can have a further recess of the same design in which the second pendulum unit sits with a precise fit. Due to the symmetrical design of the transport device, the further recess can be designed symmetrically to the recess in the first carrier device.

[0023] According to the invention, the first and second rollers of the first roller unit and / or the third and fourth rollers of the second roller unit, which has the pendulum unit, are adjacent to one another. Otherwise, i.e., without the first roller unit and / or the second roller unit being formed without a pendulum unit, the first and second rollers of the first roller unit and / or the third and fourth rollers of the second roller unit are arranged at a distance from one another. A triangular roller arrangement has the advantage of allowing smaller curve radii.

[0024] In a further embodiment, the first and second rollers of the first roller unit and / or the third and fourth rollers of the second roller unit are designed with the same roller diameters. This simplifies the design of the transport device and saves costs and effort for repair and maintenance. For example, the first to fourth rollers can be of the same size and made of plastic, and the guide rail with running surfaces can be made of aluminum, which has the advantage that no greasing of the system is required. In comparison, a system made of steel (with regard to the rollers and the guide rail with running surfaces) must be greased.

[0025] According to the invention, the first and second running surfaces of the first guide rail side flank of the curved guide rail of the transport system are arranged at an angle to an axis of symmetry of the guide rail. The first and second running surfaces of the first guide rail side flank are spaced apart from one another and face one another. Furthermore, the first support device is designed such that the first and second rollers of the first roller unit and the third and fourth rollers of the second roller unit are oriented towards one another and are arranged at an angle to the axis of symmetry of the guide rail on the first and second running surfaces on the first guide rail side flank. Due to the inwardly facing running surfaces, the transport device can be designed more compactly, since the rollers of the roller units are also oriented inward. The guide rail can, for example, have a double-T support profile in cross-section.Furthermore, it is conceivable to use the transport device for other guide rail profiles. A characteristic of a linear transport system is that the transport devices are moved with high dynamics, which means that the rollers of the transport device can be worn down quickly. The inventive arrangement of the rollers of the transport device can therefore advantageously contribute to reducing wear. Furthermore, the transport device can be flexibly combined with various guide rail contours of the transport system.

[0026] In a further embodiment, the transport system has a drive device with a plurality of coils and magnets. The drive device is designed to drive the at least one transport device. The coils can be individually energized and the magnets are arranged on the at least one transport device. The coils generate a magnetic field for the operative connection with the magnets arranged on the at least one transport device. The at least one transport device is set in motion by the operative connection. An advantage of the design of the transport system is that no cables are required for implementation. These would make the transport system confusing and lead to restricted mobility of the transport device. Furthermore, the transport system does not require complicated installation and maintenance, since no gears, belts or chains are used for the transport system.

[0027] According to the invention, a transport device is further proposed which is suitable for use in a transport system according to one of the preceding claims.

[0028] The advantageous embodiments and further developments of the invention explained above and / or reproduced in the subclaims can - except, for example, in cases of clear dependencies or incompatible alternatives - be used individually or in any combination with one another.

[0029] The above-described properties, features, and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more readily understood in connection with the following description of exemplary embodiments, which are explained in more detail in conjunction with the schematic drawings. They show: Figure 1 a transport system with transport devices in a side view Figure 2 a perspective and tilted view of a section X of the Figure 1 shown transport system with transport devices; Figure 3 a schematic representation of an arrangement of rollers of the transport devices according to Figure 1 ; Figure 4 an enlarged and rotated perspective view of a transport device of a Figure 2 marked area A; Figure 5 a perspective sectional view of the transport device along a cutting plane S in Figure 4 ; and Figure 6 an enlarged perspective view of a Figure 5 shown pendulum unit.

[0030] The following figures describe an exemplary embodiment of a transport system with at least one transport device. For example, the transport system can be a linear transport system used in automation technology. In addition to a linear drive, other drive systems are also conceivable for the transport system, such as a chain conveyor, a toothed belt drive, or a drive system comprising a gear. The specification of the use of the transport system is not to be understood as limiting, since the invention can be used in all transport systems in which at least one transport device is provided. The following figures are described using a linear transport system.

[0031] Please note that the figures are merely schematic and not to scale. Therefore, components and elements shown in the figures may be exaggerated or reduced in size for clarity. Furthermore, please note that the reference numerals in the figures have been chosen unchanged for elements and / or components of the same design and / or size.

[0032] Figure 1shows a side view of a transport system 100, which, for example, has three transport devices 200. The guide rail of the transport system 100 can be designed as a closed track having two curved guide rail sections 105, hereinafter also referred to as curved guide rail 105, and two straight guide rail sections 155, hereinafter also referred to as straight guide rail 155. By means of the guide rail, the transport devices 200 can be guided along a running direction 350. Furthermore, the transport system 100 can comprise curved motor modules 160 and straight motor modules 165, wherein the geometry of the motor modules can be varied and combined as desired, as can the contour of the curved and / or straight guide rail 105, 155. The motor modules are designed as linear motors.These linear motors have a plurality of stator teeth 145, with electrical coils (not shown) wound around at least some of the stator teeth 145, which can be individually and separately energized. Thus, the coils make it possible to generate a traveling magnetic field.

[0033] Figure 2 shows a perspective and tilted view of a section of a first marked area X of the Figure 1 The transport system 100 has a curved guide rail 105 and a straight guide rail 155. Furthermore, the transport system 100 comprises at least one transport device 200, wherein in Figure 2 (as well as in Figure 1 ) three transport devices 200 are shown as examples. The number of transport devices 200 is arbitrarily selected and may also differ from the number shown.

[0034] Furthermore, the transport system 100 comprises a drive device 140, which has an arcuate motor module 160 and a straight motor module 165 as well as a plurality of magnets 150. The magnets 150 arranged on the transport devices 200 can be used in conjunction with the Figure 1 described, generated by the coils, without the need for additional active drive elements on the transport devices.

[0035] The current flow in the coils generates the magnetic traveling field for an active connection with the magnets 150 of the transport devices 200. An active connection describes an interaction of the magnetic traveling field of the coils with the magnets 150 of the transport devices 200, whereby the transport devices 200 are moved along the curved 105 or straight 155 guide rail.

[0036] The transport devices 200 of the transport system 100 in the Figure 1 and2 are each arranged at a distance from one another. This distance can vary depending on the design of the transport system 100. The transport devices 200 of the transport system 100 can also be moved individually, moved freely in a group of several transport devices 200, or moved synchronously in a group of several transport devices 200. The transport devices 200 of the transport system 100 can thus be flexibly used for various positioning or transport tasks. The transport devices 200 can also be referred to as a carriage, comprising a platform for transporting an object, as a trolley, comprising a holder for fastening and transporting an object, or as a mover. Furthermore, further designs of the transport devices 200 are conceivable.

[0037] Additionally, no cabling is provided for the transport devices 200 of the transport system 100. The lack of cabling has a beneficial effect on the free mobility of the respective transport devices 200 within the transport system 100. At the same time, the transport system 100 is designed to be more clearly arranged and less prone to wear. The described design also simplifies the installation and maintenance of the transport system 100, since no gears, belts, or chains are used in the transport system 100.

[0038] The transport devices 200 each have a plurality of rollers for moving the transport device 200 along running surfaces of the guide rail of the transport system 100. The schematic arrangement of the rollers of the transport devices 200 is shown in Figure 3 shown. For the representation in Figure 3A section of the guide rail, comprising a straight guide rail 155 and a curved guide rail 105 as well as the roller arrangement of three transport devices 200 on a first guide rail side flank 110, was chosen as an example. Since the individual transport devices 200 of the Figure 1 and 2 shown transport system 100 can be constructed and designed equivalently, is used to explain the Figure 3 only one of the transport devices 200 according to the invention is referred to.

[0039] In the schematic representation in Figure 3a first and second roller 210, 215 of a first roller unit 220 are arranged at a distance from one another, and a third and fourth roller 225, 230 of a second roller unit 235 are adjacent to one another and have a first pendulum unit 245. The first pendulum unit 245 comprises a first pendulum axis 247 and a rigid connection of rotation axes (not shown) of the third and fourth rollers 225, 230 of the second roller unit 235. The present invention provides for the first roller unit 220 and / or the second roller unit 235 of the transport device 200 to be designed with a first pendulum unit 245 and thereby to be able to wear the first and second rollers 210, 215 of the first roller unit 220 and / or the third and fourth rollers 225, 230 of the second roller unit 235, which has the first pendulum unit 245, evenly.This is possible with a symmetrical design of the first pendulum unit 245 and the exemplary third and fourth rollers 225, 230 of the second roller unit 235, which has the first pendulum unit 245 and the first and second rollers 210, 215 of the first roller unit 220.

[0040] Furthermore, in an embodiment not shown, the first and second rollers 210, 215 of the first roller unit 220 can have the first pendulum unit 245, and in this way the axes of rotation of the first and second rollers 210, 215 are rigidly connected (not shown). Alternatively, in an embodiment also not shown, it is also conceivable that the first and second rollers 210, 215 of the first roller unit 220 and the third and fourth rollers 225, 230 of the second roller unit 235 each have a pendulum unit 245, and the axes of rotation of the first and second rollers 210, 215 of the first roller unit 220 and the axes of rotation of the third and fourth rollers 225, 230 of the second roller unit 235 are rigidly connected (not shown).

[0041] A first and second dashed line 375, 380 between the first and second rollers 210, 215 of the first roller unit 220 and the third and fourth rollers 225, 230 of the second roller unit 235 with the first pendulum unit 245 run parallel to one another in the schematic representation. A third dashed line 385 connects the first and second lines 375, 380 and is oriented orthogonally to the first and second lines 375, 380. The first pendulum axis 247 is arranged at the intersection point of the second and third lines 380, 385 and is shown as a black dot. The arrow above the first pendulum axis 247 is intended to illustrate the pivotable mounting of the third and fourth rollers 225, 230 of the second roller unit 235 about the first pendulum axis 247.The position of the first pendulum axis 247 can vary in a further, not shown, embodiment, wherein the position of the first pendulum axis 247 can, for example, move upwards along the third line 385, i.e., beyond the third and fourth rollers 225, 230. This can, if necessary, result in the design of the transport device 200 and the curved and straight guide rails 105, 155 also having to be adapted. A further, also not shown, embodiment as described above is also conceivable, in which the first roller unit 220 has the first pendulum unit 245 and the first and second rollers 210, 215 are adjacent to one another, and the third and fourth rollers 225, 230 of the second roller unit 235 are arranged at a distance from one another.

[0042] In order for the first to fourth rollers 210, 215, 225, 230 of the first and second roller units 220, 235 to rest against and make contact with the first and second running surfaces 115, 120 of the first guide rail side flank 110 of the curved and straight guide rails 105, 155, a force is required to press the first to fourth rollers 210, 215, 225, 230. The force for pressing the first to fourth rollers 210, 215, 225, 230, i.e., the preload of the first to fourth rollers 210, 215, 225, 230 against the first and second running surfaces 115, 120, is achieved by means of a so-called "overpressing." To achieve the over-pressing, the first to fourth rollers 210, 215, 225, 230 of the transport device 200 are structurally spaced apart by a factor greater than the width of the curved and straight guide rails 105, 155 with the first and second running surfaces 115, 120 allows.The over-pressing is therefore achieved by the deliberate design of protruding first to fourth rollers 210, 215, 225, 230 and thus presses the first and second rollers 210, 215 against the first running surface 115 and the third and fourth rollers 225, 230 against the second running surface 120 of the curved and straight guide rails 105, 155.

[0043] By means of the first pendulum unit 245 provided in the invention and the over-pressing of the first to fourth rollers 210, 215, 225, 230 of the first and second roller units 220, 235, it can be ensured that the third and fourth rollers 225, 230 of the second roller unit 235, comprising the first pendulum unit 245, and / or the first and second rollers 210, 215 of the first roller unit 220, comprising the first pendulum unit 245, always have contact with the first and second running surfaces 115, 120 of the curved and straight running rails 105, 155.

[0044] Figure 3illustrates the principle underlying the invention of the arrangement of the second roller unit 235, which exemplarily has the first pendulum unit 245, as well as the first roller unit 220 of the transport device 200 for the first guide rail side flank 110. The following figures show a concrete embodiment of the invention with a straight guide rail 155, which has an approximate double-T-beam profile in cross section and then, in addition to the first guide rail side flank 110, has a second guide rail side flank 135 with a third roller unit 260 and a fourth roller unit 275, as for example in Figure 4is shown. The arrangement of the first to fourth rollers 210, 215, 225, 230 of the first and second roller units 220, 235 on the first guide rail side flank 110 as well as a fifth and sixth roller 250, 255 of the third roller unit 260 and a seventh and eighth roller 265, 270 of the fourth roller unit 275 on the second guide rail side flank 135 of the transport device 200 is adapted to the straight guide rail 155 with the double-T-beam profile. The above-explained principle of the roller arrangement of the first to fourth rollers 210, 215, 225, 230 as well as the design of the first and second roller units 220, 235 is equally transferable to the fifth to eighth rollers 250, 255, 265, 270 and the third and fourth roller units 260, 275 and is not explained separately here.

[0045] Figure 4 shows an enlarged and rotated perspective view of a transport device 200 of a Figure 2marked second area A. For better clarity, a straight guide rail 155 was chosen for the illustration of the transport device 200 according to the invention in Figures 4, 5 and 6, along which the transport device 200 moves. For example, the running direction 350 of the transport device 200 can be as shown in the Figure 4 , 5 and 6 In addition, other configurations for the running direction 350 of the transport device 200 are also possible, in particular along a curved guide rail 105 as shown in the Figure 1 and 2shown, is conceivable. The straight guide rail 155 of the transport system 100 comprises the first guide rail side flank 110 and the second guide rail side flank 135. The first and second running surfaces 115, 120 are formed on the first guide rail side flank 110. The third and fourth running surfaces 125, 130 are formed on the second guide rail side flank 135. The first and second running surfaces 115, 120 are spaced apart from one another and arranged facing one another, and the third and fourth running surfaces 125, 130 are spaced apart from one another and arranged facing one another.

[0046] Furthermore, the straight guide rail 155 of the transport system 100 has an axis of symmetry F, as in Figure 4is shown. The first to fourth running surfaces 115, 120, 125, 130 are each arranged at an angle α to the axis of symmetry F of the straight running rail 155. The angle α is shown as an example to illustrate the arrangement of the first running surface 115, against which the first roller unit 220 rests, relative to the axis of symmetry F of the running rail, where α in degrees applies: 0° < α < 90°. For example, α can take on the value 45°. The other angles α for the arrangement of the second running surface 120 relative to the axis of symmetry F as well as the arrangement of the third running surface 125 relative to the axis of symmetry F and the arrangement of the fourth running surface 130 relative to the axis of symmetry F are not shown for the sake of clarity. Figure 4 Since the guide rail 155 is designed symmetrically with respect to the running direction 350, the arrangements of the second to fourth running surfaces 120, 125, 130 each have the same angle α to the axis of symmetry F of the guide rail.

[0047] The Figure 4 The straight guide rail 155 of the transport system 100 shown in FIG. 1 has, in cross-section, an approximate double-T-beam profile. However, the transport device 200 according to the invention with the first to fourth roller units 220, 235, 260, 275 is not limited to the Figure 4The invention is not limited to the guide rail profile shown, but can be used for any guide rail profiles and guide rail contours, such as S-curves, X-profiles, etc. The advantage of the design of the transport system 100 with the straight guide rail 155 with a double-T beam profile, in which the first to fourth running surfaces 115, 120, 125, 130 are oriented inward and facing one another, is that the transport device 200 can thereby be designed with compact dimensions. However, the dimensions of the transport device 200 can increase with a different arrangement of the first to fourth running surfaces 115, 120, 125, 130 of the straight guide rail 155, which can be caused, for example, by a different guide rail profile. Furthermore, the invention is not limited to the use of a symmetrically designed straight guide rail 155, but can also be used for asymmetrically designed straight guide rails 155.

[0048] The above-described embodiment of the straight guide rail 155 as well as the following description of the design of a first support device 240 and a second support device 280 can equally be applied to the design of the curved guide rail 105 as well as to the design of the straight guide rail 155, which is shown in the Figure 1 and 2 shown apply.

[0049] The transport device 200 has a first carrier device 240, a coupling element 290, and a second carrier device 280. The coupling element 290 of the transport device 200 can be bow-shaped and provided to connect the first carrier device 240 and the second carrier device 280 to one another. The first carrier device 240 is designed to preload the first roller unit 220 against the first running surface 115 and the second roller unit 235 against the second running surface 120, wherein the first roller unit 220 comprises the first roller 210 and the second roller 215 (not shown) and the second roller unit 235 comprises the third roller 225 and the fourth roller 230.The second support device 280 is configured to preload the third roller unit 260 against the third running surface 125 and the fourth roller unit 275 against the fourth running surface 130, wherein the third roller unit 260 comprises the fifth roller 250 and the sixth roller 255 (not shown), and the fourth roller unit 275 comprises the seventh roller 265 and the eighth roller 270. The plurality of rollers 205, i.e., the first to eighth rollers 210, 215, 225, 230, 250, 255, 265, 270, can be configured with the same roller diameters. It is also conceivable, if space permits, to configure the first to eighth rollers 210, 215, 225, 230, 250, 255, 265, 270 with different roller diameters. Furthermore, the first to eighth rollers 210, 215, 225, 230, 250, 255, 265, 270 can be made of the same material, for example, the first to eighth rollers 210, 215, 225, 230, 250, 255, 265, 270 can be made of plastic.

[0050] The preload of the first to fourth roller units 220, 235, 260, 275 against the first to fourth running surfaces 115, 120, 125, 130 is realized by means of the overpressing described above, in that the first and second roller units 220, 235 and the third and fourth roller units 260, 275 are structurally designed to be further spaced than the straight running rail 155 is wide on the first running rail side flank 110 and the second running rail side flank 135. The over-pressing presses the first to fourth roller units 220, 235, 260, 275 against the first to fourth running surfaces 115, 120, 125, 130 of the straight guide rail 155 and in this way ensures contact of the first to eighth rollers 210, 215, 225, 230, 250, 255, 265, 270 of the first to fourth roller units 220, 235, 260, 275 with the first to fourth running surfaces 115, 120, 125, 130.

[0051] This is possible because the first and second roller units 220, 235 are connected to the first carrier device 240. Furthermore, the third and fourth roller units 260, 275 are connected to the second carrier device 280, and the first and second carrier devices 240, 280 are joined together via the bow-shaped coupling element 290. The first carrier device 240, the second carrier device 280, and the coupling element 290 can be made of aluminum, for example, although other materials are also conceivable. When aluminum is used, the first carrier device 240, the second carrier device 280, and the coupling element 290 of the transport device 200 can deform elastically, thereby resiliently supporting the transport device 200 on the straight guide rail 155 of the transport system 100.The resilient mounting and preload of the transport device 200 can be achieved without the use of additional components, such as springs, but rather only by means of a targeted utilization of the material properties and the construction of the transport device 200.

[0052] The linear motor used to drive the transport device 200 and which is Figure 4 shown straight motor module 165, furthermore regulates the position of the transport device 200 on the straight guide rail 155 of the transport system 100. With the help of the transport device 200, a desired position on the straight guide rail 155 of the transport system 100 can be approached with high dynamics and at the same time a good driving dynamics, i.e. a good grip of the first to fourth roller units 220, 235, 260, 275 of the transport device 200, also for the use of a curved guide rail 105, as in the Figures 1 to 3shown, can be ensured. The quality of the linear motor's position control is better the harder the transport device 200 is sprung on the guide rail, i.e., the higher the preload of the first to fourth roller units 220, 235, 260, 275 against the first to fourth running surfaces 115, 120, 125, 130.

[0053] The first support device 240 is designed such that the first to fourth rollers 210, 215, 225, 230 of the first and second roller units 220, 235 are oriented toward each other and form a V-shaped arrangement. The first and second roller units 220, 235 are each arranged at an angle α to the axis of symmetry F of the straight guide rail 155. The first and second roller units 220, 235 bear against the first and second running surfaces 115, 120 and roll over their axes of rotation, which are Figure 4 not shown, along the running direction 350 on the first and second running surfaces 115, 120.

[0054] The second support device 280 is further designed such that the fifth to eighth rollers 250, 255, 265, 270 of the third and fourth roller units 260, 275 are oriented toward each other and form a V-shaped arrangement. The third and fourth roller units 260, 275 are each arranged at an angle α to the axis of symmetry F of the guide rail 155. The third and fourth roller units 260, 275 bear against the third and fourth running surfaces 125, 130 and roll over their axes of rotation, which are Figure 4 not shown, along the running direction 350 on the third and fourth running surfaces 125, 130.

[0055] Accordingly, the first to fourth roller units 220, 235, 260, 275 are arranged symmetrically to the symmetry axis F of the straight guide rail 155 on the first to fourth running surfaces 115, 120, 125, 130, and the transport device 200 thus has a symmetrical design that is matched to the straight guide rail 155 of the transport system.

[0056] The Figure 4 The transport device 200 shown has the drive device 140 below the straight guide rail 155. The magnets 150 of the drive device 140 are attached to the inner sides of the transport device 200 facing the straight motor module 165, wherein due to the perspective view of Figure 4only the magnets 150 arranged on the first carrier device 240 are visible. Further magnets 150 are arranged in a similar manner on the second carrier device 280. The stator teeth 145 of the drive device 140, which are at least partially wound with coils not shown, are located opposite the arrangement of the magnets 150. Due to the symmetrical design of the transport device 200, the stator teeth 145 with the coils of the drive device 140 are located between the magnets 150 arranged on the first carrier device 240 and the magnets 150 arranged on the second carrier device 280.

[0057] The second roller unit 235 has the first pendulum unit 245, wherein the first pendulum unit 245 rests on the guide rail side flank 110 of the straight guide rail 155 via the third and fourth rollers 225, 230 on the second running surface 120. The first pendulum unit 245 has the first pendulum axis 247 (not shown) and the rigid connection of the rotation axes R (not shown) of the third and fourth rollers 225, 230. The second roller unit 235 is pivotally mounted about the first pendulum axis 247 (not shown) due to the design of the first pendulum unit 245.

[0058] The fourth roller unit 275 has a second pendulum unit 285, which essentially corresponds to the first pendulum unit 245. The second pendulum unit 285 rests on the further guide rail side flank 135 of the straight guide rail 155 via the seventh and eighth rollers 265, 270 on the fourth running surface 130. The second pendulum unit 285 has the second pendulum axis 295 (not shown) and the rigid connection of the rotation axes R (not shown) of the seventh and eighth rollers 265, 270. The fourth roller unit 275 is pivotally mounted about the second pendulum axis 295 (not shown) due to the design of the second pendulum unit 285.

[0059] The Figure 4The first pendulum unit 245 shown comprises the first pendulum axle 247, which is fixedly connected to the first support device 240 by a cover 330. Furthermore, a loose mounting of the first pendulum axle 247 (not shown) is also conceivable. Similarly, the second pendulum unit 285 comprises the second pendulum axle 295, which is fixedly connected to the second support device 280 by a cover 330 (not shown). Here, too, a loose mounting of the second pendulum axle 295 (not shown) is conceivable in an alternative embodiment not shown.

[0060] Also conceivable is a configuration of the transport device 200 (not shown), in which the first and / or third roller unit 220, 260 comprises a pendulum unit with a rigid connection of the rotation axes R of the first and second rollers 210, 215 or fifth and sixth rollers 250, 255, as well as a pendulum axis (not shown). Furthermore, the first and third roller units 220, 260 can each comprise a pendulum unit with the aforementioned features (not shown).

[0061] Figure 5 shows a perspective sectional view of the transport device 200 along a sectional plane S in Figure 4 . Figure 5 shows analogous to Figure 4 the first and second rollers 210, 215 of the first roller unit 220 and the third and fourth rollers 225, 230 of the second roller unit 235, wherein the second roller unit 235 has the pendulum unit 245. Also in Figure 5According to an embodiment not shown, it is conceivable to design the first roller unit 220 with a first pendulum unit 245 or to design the first and second roller units 220, 235 simultaneously with pendulum units.

[0062] The first roller 210 is connected to the first support device 240 by means of a first fastening element 305, and the second roller 215 is connected to the first support device 240 by means of a second fastening element 310. The first and second fastening elements 305, 310 can be designed as screws, for example. Other fastening means are also possible, for example pins to which the rollers are glued, bolts, etc., which are designed to connect the first and second rollers 210, 215 of the first roller unit 220 to the first support device 240 and thereby enable preloading of the first and second rollers 210, 215 against the first running surface (not shown) of the first guide rail side flank of the straight guide rail 155. The second roller unit 235 with the first pendulum unit 245 is also connected to the first support device 240.However, this is not shown in the illustrated view of the transport device 200.

[0063] In Figure 5 It can be seen that the first and second rollers 210, 215 of the first roller unit 220 are arranged at a distance from one another, and the third and fourth rollers 225, 230 of the second roller unit 235, which has the first pendulum unit 245 with the first pendulum axis 247 (not shown), are adjacent to one another. With the aid of this configuration, a simplified construction of a triangular roller arrangement is possible. The triangular roller arrangement comprises two rollers that bear against and roll on the first running surface and two rollers that bear against and roll on the second running surface, wherein the rollers that bear against and roll on the second running surface are adjacent to one another and are arranged centrally to the distance between the two rollers that bear against and roll on the first running surface. For the exemplary embodiment in Figure 5Thus, the second roller unit 235 is arranged with the first pendulum unit 245 centrally to the distance between the two rollers of the first roller unit 220. This creates a tilted, triangular arrangement of the first to fourth rollers 210, 215, 225, 230 on the first guide rail side flank, the tilted arrangement being achieved by the inclination or arrangement of the running surfaces with respect to the axis of symmetry of the straight guide rail 155.

[0064] For optimal force distribution between the first to fourth rollers 210, 215, 225, 230 of the first and second roller units 220, 235, the triangular arrangement of the first to fourth rollers 210, 215, 225, 230 of the transport device 200 is symmetrical. A symmetrical triangular arrangement of the first to fourth rollers 210, 215, 225, 230 can contribute to the transport device 200 being designed to be compact, relative to its dimensions in the direction of the straight guide rail 155. It is also conceivable to space the third and fourth rollers 225, 230 of the second roller unit 235, which has the first pendulum unit 245, further apart from one another. In order to further ensure the symmetrical triangular roller arrangement of the transport device 200, the first and second rollers 210, 215 of the first roller unit 220 must also be arranged further apart from one another.This then results in the dimensions of the transport device 200 increasing along the straight guide rail 155.

[0065] Furthermore, in an embodiment not shown, the first to fourth rollers 210, 215, 225, 230 of the transport device 200 can also be arranged in an asymmetrical triangular shape, i.e., the two rollers of the second roller unit 235 with the first pendulum unit 245 and the first pendulum axis 247 (not shown) are then located at different distances from the first pendulum axis 247 (not shown). In such an embodiment, however, due to the law of the lever, it is possible - when considering the first pendulum unit 245 with the third and fourth rollers 225, 230 as a two-sided lever pivotally mounted about the first pendulum axis 247 (rotation axis) - that more force is transmitted to the roller located at a shorter distance from the first pendulum axis 247 than to the roller with a longer lever arm, i.e., a greater distance from the first pendulum axis 247 (the first pendulum axis 247 is Figure 5(not shown). This can increase wear on the roller subject to greater stress, as it wears out more quickly due to the power transmission.

[0066] The seventh and eighth rollers 265, 270 of the transport device 200 form the fourth roller unit 275. The fourth roller unit 275 rolls on the fourth running surface 130 of the straight guide rail 155 and has a second pendulum unit 285. The second pendulum unit 285 is constructed analogously to the first pendulum unit 245 and comprises an axis of symmetry B. A second pendulum axis 295 of the second pendulum unit 285 lies on the axis of symmetry B. The second pendulum axis 295 is oriented transversely to the running direction 350 of the seventh and eighth rollers 265, 207 of the fourth roller unit 275, which comprises the second pendulum unit 285, and is implemented as a bolt in the illustrated embodiment. However, other configurations of the second pendulum axis 295 are also conceivable, such as a pin. The second pendulum axle 295 is fixedly connected to the second support device 280 by a cover 330, wherein the cover 330 is fixed by a third and fourth fastening element 340, 345.Alternatively, a loose second pendulum axle 295 is also conceivable. The third and fourth fastening elements 340, 345 are designed as screws, for example. Bolts, pins that are glued, etc. are also conceivable for securing the cover 330.

[0067] Furthermore, the second pendulum unit 285 has a rigid connection of the rotational axes R (not shown) of the seventh and eighth rollers 265, 270, wherein the rigid connection is designed as a U-shaped connecting element 300. The second pendulum axis 295 pivotally supports the rigid connection of the rotational axes of the seventh and eighth rollers 265, 270 of the fourth roller unit 275. The seventh and eighth rollers 265, 270 of the fourth roller unit 275 are connected to the U-shaped connecting element 300 via a first and second fastening element 305, 310, similar to the other rollers. For this purpose, the seventh and eighth rollers 265, 270 are placed on ends of the U-shaped connecting element 300 of the second pendulum unit 285 and, together with the first and second fastening elements 305, 310 and the U-shaped connecting element 300, form a U-shaped body 315.The U-shaped body 315 can be designed as a rigid body, and the first and second fastening elements 305, 310 can be designed as shoulder screws, as other screws, or as one of the above-mentioned alternative fastening means for fixing the cover 330.

[0068] Furthermore, the second pendulum unit 285 has bearing elements 325, wherein the bearing elements 325 pivotally support the U-shaped body 315 about the second pendulum axis 295. The bearing elements 325 are in Figure 6 shown in more detail and can be provided to protect the second pendulum axis 295. The bearing elements 325 can be designed as ball or plain bearings; alternatively, it is possible to pivot the U-shaped body 315 about the second pendulum axis 295 without bearing elements 325. The U-shaped body 315 can be mounted in the axial direction in order to be as stable as possible, i.e., to have little play.

[0069] The seventh and eighth rollers 265, 270 can, as described above, have additional bearing elements 335, which can be provided to reduce the frictional resistance of the seventh and eighth rollers 265, 270 during movement along the fourth running surface 130. The additional bearing elements 335 can also be designed as ball bearings or plain bearings, as described above. Likewise, the first to sixth rollers 210, 215, 225, 230, 250, 255 can have additional bearing elements 335, which can be designed as ball or plain bearings and in Figure 5 are not shown. The bearing elements of the first pendulum unit 245 are in Figure 5 also not shown. They can be designed analogously to the bearing elements 325 of the second pendulum unit 285 or, alternatively, not be provided on the first pendulum unit 245.

[0070] The second carrier device 280 has a recess 320 in which the second pendulum unit 285 is seated with a precise fit. If the second pendulum unit 285 is arranged in the recess 320, the seventh and eighth rollers 265, 270 protrude beyond the recess 320 in the second carrier device 280. The precise fit of the recess 320 and the second pendulum unit 285 allows a space-saving design of the transport device 200. The first carrier device 240 can also have such a recess in which the first pendulum unit 245 is seated. This is shown in Figure 5 However, not shown. In an alternative embodiment of the transport device 200 (not shown), the first and third roller units 220, 260 can also each have a pendulum unit. The first carrier device 240 and the second carrier device 280 can then comprise further recesses, similar to the recess 320.

[0071] The described features for the design of the second pendulum unit 285 with the axis of symmetry B as well as the rigid connection of the axes of rotation R of the seventh and eighth rollers 265, 270 can, due to the symmetry of the transport device 200 and the identical design of the first and second roller units 220, 235 and the third and fourth roller units 260, 275, equally apply to the design of the first pendulum unit 245 and the rigid connection of the axes of rotation R of the third and fourth rollers 225, 230. The rigid connection of the axes of rotation R of the third and fourth rollers 225, 230 can also be designed as a further U-shaped connecting element, wherein the further U-shaped connecting element is pivotally mounted about the first pendulum axis 247. If the first roller unit 220 and the third roller unit 260 have further pendulum units, the axes of rotation R of the first and second rollers 210, 215 andthe rotation axes R of the fifth and sixth rollers 250, 255 are each rigidly connected via further U-shaped connecting elements.

[0072] Figure 6 shows an enlarged perspective view of the Figure 5 illustrated second pendulum unit 285 and additionally comprises the cover 330 and the third and fourth fastening element 340, 345 for connecting the second pendulum axis 295 of the second pendulum unit 285 to the second support device 280. The bearing elements 325 of the second pendulum unit 285 are between the cover 330 and the U-shaped body 315 and the U-shaped body 315 and the in Figure 6 shown free end 365 of the second pendulum axle 295. For simplified illustration, the second carrier device 280 is Figure 6 not shown. For this reason, the second pendulum axle 295 may have a free end 365 which is not, as in Figure 5 shown, into the second carrier device 280.

[0073] The second pendulum unit 285 is symmetrically constructed and includes the symmetry axis B, on which the second pendulum axis 295 lies. The seventh and eighth rollers 265, 270 are adjacent to each other and are connected to the U-shaped connecting element 300 by means of the first and second fastening elements 305, 310. The seventh and eighth rollers 265, 270, the U-shaped connecting element 300, as well as the first and second fastening elements 305, 310, form the U-shaped body 315 analogously to Figure 5 . In Figure 6 The roller diameter D is shown as an example for the eighth roller 270. The seventh roller 265 can also be designed with the same roller diameter D, as can the first to sixth rollers 210, 215, 225, 230, 250, 255, as already explained above.

[0074] Furthermore, Figure 6by way of example, the axis of rotation R of the eighth roller 270. The axis of rotation of the eighth roller 270 runs through a circle center C of a circular surface 370 when the eighth roller 270 is cylindrical. The eighth roller 270 rests with its outer surface M on the fourth running surface (not shown) and rolls via its axis of rotation R along the fourth running surface on the straight and curved running rails 155, 105. Likewise, the first to sixth rollers 210, 215, 225, 230, 250, 255 (not shown) as well as the seventh roller 265 can have such an axis of rotation R, which runs through the circle center C of the circular surface 370 of the likewise cylindrically designed first to sixth rollers 210, 215, 225, 230, 250, 255 as well as the seventh roller 265.The first to sixth rollers 210, 215, 225, 230, 250, 255 and the seventh roller 265 can then, analogously to the eighth roller 270, rest with their outer surface M on the first to fourth running surfaces 115, 120, 125, 130 and roll along their axes of rotation R along the first to fourth running surfaces 115, 120, 125, 130. It is also conceivable to design the first to eighth rollers 210, 215, 225, 230, 250, 255, 265, 270 in a geometric shape different from that shown in Figure 6.

[0075] The second pendulum axle 295 is arranged below the adjacent seventh and eighth rollers 265, 270 of the fourth roller unit 285 and is surrounded on both sides by the U-shaped connecting element 300 and, as already explained, can open into the second carrier device 280 instead of the free end 365. Instead of the U-shaped connecting element 300 as in the Figure 5 and 6As shown, further geometric shapes are conceivable by means of which the axes of rotation R of the second and / or fourth roller units 235, 275, which each have the first and second pendulum units 245, 285, are rigidly connected. While maintaining the symmetrical design of the first and / or second pendulum units 245, 285, the first and / or second pendulum axis 247, 295 can continue to lie on the axis of symmetry B of the first and / or second pendulum units 245, 285.

[0076] All the features of the second pendulum unit 285 with the second pendulum axle 295 (as well as the fourth roller unit 275, which includes the seventh and eighth rollers 265, 270) explained above, which are related to the Figures 4 to 6explained are equally applicable to the first pendulum unit 245 with the first pendulum axis 247 (as well as the first roller unit 220, which comprises the first and second rollers 210, 215 and / or the second roller unit 235, which comprises the third and fourth rollers 225, 230). Figure 3 The essential core of the invention was described with the aid of the second roller unit 235, which has the third and fourth rollers 225, 230 and, in addition, the first pendulum unit 245 with the first pendulum axis 247. In the following figures, for the explanation of further features of the pendulum unit and the pendulum axis, reference was made only to the second pendulum unit 285 with the second pendulum axis 295, and to the fourth roller unit 275 with the seventh and eighth rollers 265, 270. The further features of the pendulum unit according to the invention are therefore not limited to the second pendulum unit 285 with the second pendulum axis 295.

[0077] The invention has been described in detail using preferred embodiments. Instead of the described embodiments, further embodiments are conceivable, which may include further modifications or combinations of the described features. For this reason, the invention is not limited to the disclosed examples, since other variations may be derived therefrom by a person skilled in the art without departing from the scope of the invention. List of reference symbols

[0078] 100Transport system 105Curved guide rail 110First guide rail side flank 115First running surface 120Second running surface 125Third running surface 130Fourth running surface 135Second guide rail side flank 140Drive device 145Stator teeth 150Magnets 155Straight guide rail 160Curved motor module 165Straight motor module ASecond marked area BSymmetry axis (pendulum unit) CCircle center DRooler diameter FSymmetry axis (guide rail) MLateral surface RRotation axis SSection plane XFirst marked area αAcute angle 200Transport device 205Multiple rollers 210First roller 215Second roller 220First roller unit 225Third roller 230Fourth roller 235Second roller unit 240First carrier device 245First pendulum unit 247First pendulum axle 250Fifth roller 255Sixth roller 260Third roller unit 265Seventh roller 270Eighth roller 275Fourth roller unit 280Second carrier device 285Second pendulum unit 290Coupling element 295Second pendulum axle 300 U-shaped connecting element 305 First fastening element 310 Second fastening element 315 U-shaped body 320 Recess 325 Bearing elements 330 Cover 335 Further bearing elements 340 Third fastening element 345 Fourth fastening element 350 Direction of travel 355 Fifth fastening element 360 Sixth fastening element 365 Free end of the second pendulum axis 370 Circular area 375 First dashed line 380 Second dashed line 385 Third dashed line

Claims

1. Transport system (100) having a curved running rail (105) which has a first running surface (115) and a second running surface (120) on a first running rail lateral flank (110), and having at least one transport device (200) which is guided in a running direction (350) along the running rail (105), wherein the transport device (200) for guiding has a plurality of rollers (205) which are in each case mounted so as to be rotatable about a dedicated rotation axis (R), wherein a first roller (210) and a second roller (215) of the transport device (200) form a first roller unit (220) for rolling on the first running surface (115), wherein a third roller (225) of the transport device (200) forms a second roller unit (235) for rolling on the second running surface (120), wherein the first roller unit (220) and the second roller unit (235) are connected by way of a first carrier device (240), which is designed to preload the first roller unit (220) in relation to the first running surface (115), and preload the second roller unit (235) in relation to the second running surface (120), wherein the first running surface (115) and the second running surface (120) are disposed on the first running rail lateral flank (110) at an angle (α) to an axis of symmetry (F) of the running rail (105), wherein the first running surface (115) and the second running surface (120) are mutually spaced apart and disposed so as to face one another and be oriented inwards, wherein the first carrier device (240) is designed such that the first and second rollers (210, 215) of the first roller unit (220) and the third roller (225) of the second roller unit (235) are likewise disposed so as to be mutually oriented inwards, and are disposed on the first and second running surfaces (115, 120) on the first running rail lateral flank (110) at the angle (α) to the axis of symmetry (F) of the running rail (105), characterized in that the second roller unit (235) of the transport device (200) has a fourth roller (230) for rolling on the second running surface (120), wherein the first and second rollers (210, 215) of the first roller unit (220) and the fourth roller (225) of the second roller unit (235) are likewise disposed so as to be mutually oriented inwards, and are disposed on the first and second running surfaces (115, 120) on the first running rail lateral flank (110) at the angle (α) to the axis of symmetry (F) of the running rail (105), wherein the first roller unit (220) or the second roller unit (235) has a swing unit (245, 285), wherein the swing unit (245, 285) has a rigid connection of the rotation axes (R) of the first and second rollers (210, 215) of the first roller unit (220) or a rigid connection of the rotation axes (R) of the third and fourth rollers (225, 230) of the second roller unit (235), and a swing axle (247, 295), wherein the rigid connection is mounted so as to be pivotable about the swing axle (247, 295), wherein the swing axle (247, 295) is disposed transversely to the direction of travel (350) of the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) comprising the swing unit (245, 285), wherein the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) comprising the swing unit (245, 285) are mutually adjacent, wherein alternatively the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) are disposed so as to be spaced apart, and wherein the two mutually adjacent rollers are disposed centrically in terms of the spacing of the two spaced-apart rollers.

2. Transport system (100) according to Claim 1, wherein the running rail (105) has a second running rail lateral flank (135) along the running direction (350), wherein the transport device (200) comprises a third roller unit (260) and a fourth roller unit (275) which roll on the second running rail lateral flank (135), and wherein the third roller unit (260) and the fourth roller unit (275) are connected by way of a second carrier device (280).

3. Transport system (100) according to Claim 2, wherein the running rail (105) is formed symmetrically along the running direction (350), and the second running rail lateral flank (135) comprises a third running surface (125) and a fourth running surface (130), wherein the transport device (200) is formed symmetrically to the running rail (105), and the third roller unit (260) rolls on the third running surface (125) and the fourth roller unit (275) rolls on the fourth running surface (130), wherein the third and fourth roller unit (260, 275) are designed identically to the first and second roller unit (220, 235), and wherein the second carrier device (280) is designed identically to the first carrier device (240).

4. Transport system (100) according to Claim 2 or 3, having a coupling element (290), which is formed in the shape of a bracket, wherein the coupling element (290) is designed to connect the first carrier device (240) and the second carrier device (280) to one another.

5. Transport system (100) according to one of Claims 1 to 4, wherein the swing unit (245, 285) is symmetrically constructed, and wherein the swing axle (247, 295) lies on a symmetry axis (B) of the swing unit (245, 285) and is fixedly connected to the first carrier device (240) of the transport device (200).

6. Transport system (100) according to one of Claims 1 to 5, wherein the swing unit (245, 285) has bearing elements (325), wherein the rigid connection of the swing unit (245, 285) is formed as a U-shaped connecting element (300), wherein the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) are attached to ends of the U-shaped connecting element (300) of the swing unit (245, 285) and fastened with a first fastening element (305) and a second fastening element (310), the assembly forming a U-shaped body (315), and wherein the bearing elements (325) mount the U-shaped body (315) so as to be pivotable about the swing axle (247, 295).

7. Transport system (100) according to one of Claims 1 to 6, wherein the first carrier device (240) has a recess (320) in which the swing unit (245, 285) sits in a precise fit, and wherein the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) project beyond the recess (320) of the first carrier device (240) when the swing unit (245, 285) is disposed in the recess (320).

8. Transport system (100) according to one of Claims 1 to 7, wherein the first and second rollers (210, 215) of the first roller unit (220) and / or the third and fourth rollers (225, 230) of the second roller unit (235) are designed having identical roller diameters (D).

9. Transport system (100) according to one of Claims 1 to 8, having a drive device (140) having a plurality of coils and magnets (150), wherein the drive device (140) is conceived for driving the at least one transport device (200), whereby the coils can be energized individually, wherein the magnets (150) are disposed on the at least one transport device (200), wherein the coils generate a magnetic field for an operative connection to the magnets (150) disposed on the at least one transport device (200), and wherein the at least one transport device (200) is set in motion by the operative connection.

10. Transport device (200) for use in a transport system (100) having a curved running rail (105) which has a first running surface (115) and a second running surface (120) on a first running rail lateral flank (110), wherein the transport device (200) for guiding on the running rail (105) in a running direction (350) has a plurality of rollers (205) which are in each case mounted so as to be rotatable about a dedicated rotation axis (R), wherein a first roller (210) and a second roller (215) of the transport device (200) form a first roller unit (220) for rolling on the first running surface (115), wherein a third roller (225) of the transport device (200) forms a second roller unit (235) for rolling on the second running surface (120), wherein the first roller unit (220) and the second roller unit (235) are connected by way of a first carrier device (240), which is designed to preload the first roller unit (220) in relation to the first running surface (115), and preload the second roller unit (235) in relation to the second running surface (120), wherein the first running surface (115) and the second running surface (120) are disposed on the first running rail lateral flank (110) at an angle (α) to an axis of symmetry (F) of the running rail (105), wherein the first running surface (115) and the second running surface (120) are mutually spaced apart and disposed so as to face one another and be oriented inwards, wherein the first carrier device (240) is designed such that the first and second rollers (210, 215) of the first roller unit (220) and the third roller (225) of the second roller unit (235) are likewise disposed so as to be mutually oriented inwards, and are disposed on the first and second running surfaces (115, 120) on the first running rail lateral flank (110) at the angle (α) to the axis of symmetry (F) of the running rail (105), characterized in that the second roller unit (235) of the transport device (200) has a fourth roller (230) for rolling on the second running surface (120), wherein the first and second rollers (210, 215) of the first roller unit (220) and the fourth roller (225) of the second roller unit (235) are likewise disposed so as to be mutually oriented inwards, and are disposed on the first and second running surfaces (115, 120) on the first running rail lateral flank (110) at the angle (α) to the axis of symmetry (F) of the running rail (105), wherein the first roller unit (220) or the second roller unit (235) has a swing unit (245, 285), wherein the swing unit (245, 285) has a rigid connection of the rotation axes (R) of the first and second rollers (210, 215) of the first roller unit (220) or a rigid connection of the rotation axes (R) of the third and fourth rollers (225, 230) of the second roller unit (235) and a swing axle (247, 295), wherein the rigid connection is mounted so as to be pivotable about the swing axle (247, 295), wherein the swing axle (247, 295) is disposed transversely to the running direction (350) of the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) comprising the swing unit (245, 285), wherein the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) comprising the swing unit (245, 285) are mutually adjacent, wherein alternatively the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) are disposed so as to be spaced apart, and wherein the two mutually adjacent rollers are disposed centrically in terms of the spacing of the two spaced-apart rollers.

11. Transport device (200) according to Claim 10, wherein the running rail (105) has a second running rail lateral flank (135) along the running direction (350), wherein the transport device (200) comprises a third roller unit (260) and a fourth roller unit (275) which roll on the second running rail lateral flank (135), and wherein the third roller unit (260) and the fourth roller unit (275) are connected by way of a second carrier device (280).

12. Transport device (200) according to Claim 10 or 11, wherein the swing unit (245, 285) is symmetrically constructed, and wherein the swing axle (247, 295) lies on a symmetry axis (B) of the swing unit (245, 285) and is fixedly connected to the first carrier device (240) of the transport device (200).

13. Transport device (200) according to one of Claims 10 to 12, wherein the swing unit (245, 285) has bearing elements (325), wherein the rigid connection of the swing unit (245, 285) is formed as a U-shaped connecting element (300), wherein the first and second rollers (210, 215) of the first roller unit (220) or the third and fourth rollers (225, 230) of the second roller unit (235) are attached to ends of the U-shaped connecting element (300) of the swing unit (245, 285) and fastened with a first fastening element (305) and a second fastening element (310), the assembly forming a U-shaped body (315), and wherein the bearing elements (325) mount the U-shaped body (315) so as to be pivotable about the swing axle (247, 295).

14. Transport device (200) according to one of Claims 10 to 13, wherein the first and second rollers (210, 215) of the first roller unit (220) and / or the third and fourth rollers (225, 230) of the second roller unit (235) are designed having identical roller diameters (D).