Transfer device and method for transferring packaging unit

Abstract

The invention relates to a transfer device for transferring packaging units, comprising at least one eccentric unit, which is equipped with a rotatably mounted eccentric element, on which a rod through-hole for a rod is provided. The rod is rotatably and axially displaceably mounted on the eccentric element through the rod through-hole. The transfer device is further provided with a first driving unit used for driving the eccentric element to rotate and a second driving unit used for driving the rod to move. A holding device for receiving the packaging unit is connected to the rod.

Description

Technical Field

[0001] This invention relates to a transfer device and a method for transferring packaging units. Background Technology

[0002] With increasing production volume and growing demands for efficiency, the market urgently needs high-capacity production, reprocessing, packaging, and product sorting equipment. This means operators require equipment with high reliability and extremely short cycle times (i.e., product handling times). Stacking operations are often required during sorting and packaging of packaging units, necessitating the transfer of packaging units from cycle-type or continuous conveyor systems to the delivery area. Furthermore, the diversification trend towards personalized packaging demands that all packaging formats be handled by transfer devices. While general-purpose transfer tables or robots can be used for transfer tasks in existing technologies, these devices are expensive to purchase, relatively slow, and therefore cannot meet cycle time requirements. Their complex technical structures also lead to difficult maintenance and repair, limiting their application scope. Summary of the Invention

[0003] The present invention aims to at least partially overcome the above-mentioned defects and provide an improved packaging unit transfer device that can achieve short cycle times, handle a variety of different packaging units, and is easy to produce and maintain.

[0004] According to one aspect of the invention, a transfer device for transferring packaging units from a receiving area to a delivery area is provided, the device comprising at least one eccentric unit. The eccentric unit includes: a rotatably mounted eccentric element having a rod through-hole spaced radially from and extending parallel to the rotation axis of the eccentric element. The eccentric unit further includes: a rod extending through the eccentric element, rotatably mounted via the rod through-hole and axially displaceable along the eccentric element. The eccentric unit further includes: a retaining device directly or indirectly connected to the rod, preferably at a first end region of the rod, configured to receive at least one packaging unit. A first drive unit is configured to drive the eccentric element to rotate, causing the retaining device to move between a retracted position and an operating position in a first plane perpendicular to the rotation axis. A second drive unit is configured to drive the rod to displace along the eccentric element axially between a first translational position and a second translational position, causing the retaining device to move parallel to the rotation axis.

[0005] The transfer device for transferring packaging units offers significant advantages due to its simple mechanical structure and short cycle time. Containing only two moving parts, it provides high transfer speed and high positioning accuracy. The streamlined mechanical structure offers robustness, ease of maintenance, and high reliability, which is particularly beneficial to the operator.

[0006] Examples of packaging units include: blister packs, pallet packs, bag packs, wallet packs, folding boxes, or cartons.

[0007] The preferred embodiment is that the rotational position of the holding device remains constant during the rotation of the eccentric element. This ensures that the orientation of the packaging unit received by the holding device remains constant, thereby facilitating the rapid transfer of the packaging unit.

[0008] The second drive unit achieves rod displacement by transmitting feed force to the second end of the rod.

[0009] Preferably, the rod is rotatably and fixedly connected to a bearing element relative to its own axis, particularly preferably to the second end of the rod, and the bearing element follows the rod's revolution around the axis of rotation caused by the rotation of the eccentric element. This design easily maintains a constant rotational position of the retaining device on the rotating rod. The support mechanism is preferably implemented by a joint rod or linear guide rails, particularly preferably by providing two linear guide rails. The first and second linear guide rails are preferably arranged perpendicular to each other.

[0010] Preferably, the rod is hollow at least in a portion of its length. The resulting through-channel preferably extends along the entire length of the rod. This through-channel may open only towards the first and second ends of the rod. Furthermore, at least a portion of the through-channel is configured to open towards the outer peripheral side of the rod. For example, the through-channel may be designed as a groove structure extending from the first end to the second end of the rod. This through-channel allows wiring to be guided through the rod to the retaining device. The through-channel preferably has a diameter of 10–50 mm, particularly preferably 20–30 mm. Alternatively, the through-channel itself may serve as a conduit, for example, to provide a medium such as compressed air to the retaining device.

[0011] Preferably, the first drive unit and the second drive unit can be controlled independently of each other. This allows the rotational motion of the holding device to be superimposed on its translational motion between the first and second translational positions, thereby reducing the cycle time of the transfer device. This design particularly advantageously improves the production efficiency of the transfer device.

[0012] Preferably, the eccentric unit is configured to allow the holding device to simultaneously perform movement parallel to the rotation axis of the eccentric element and movement parallel to the first plane within at least a portion of the movement range. This dual synchronous movement effectively reduces the cycle time of the transfer device. Furthermore, through the synchronous movement of at least a portion of the segment, the holding device can be positioned at any point within the operating area of ​​the transfer device. The complete operating area is preferably cylindrical. More precisely, this operating area is jointly determined by the distance of the rod through-hole or the rod distance from the rotation axis and the distance between the first translational position and the second translational position.

[0013] A more advantageous improvement is that the eccentric unit is configured to synchronize the movement of the holding device with the movement of the conveying device in the receiving area. Alternatively or additionally, the eccentric unit is preferably configured to synchronize the movement of the holding device with the movement of the packaging unit conveying device in the delivery area, thereby significantly improving the operating efficiency of the conveying device.

[0014] Another improvement is that the transfer device includes multiple eccentric units arranged side-by-side, such that the rotation axes of the multiple eccentric elements are parallel to each other. Doubling the number of eccentric units increases the production efficiency of the transfer device, allowing more packaging units to be transferred within a given cycle time. This measure also facilitates a more compact structure for the transfer device. Therefore, it is also preferable that the multiple packaging units are at least partially arranged front-to-back in their receiving and / or delivery areas.

[0015] A further advantage is that the rods of multiple eccentric units are coupled to each other. This can be achieved, for example, by coupling rods or coupling plates between the rods. In a preferred design, retaining devices are also preferably arranged on the coupling rods or coupling plates. For the case of two rods, more than two retaining devices may be arranged on the coupling rods or coupling plates. The coupling rods or coupling plates preferably extend perpendicular to the axial direction of the multiple rods along their main extension direction.

[0016] The multiple eccentric units can be driven by independent first drive units, but preferably only a single motor is provided, which synchronously drives at least two to all eccentric units.

[0017] For multi-eccentric unit configurations, the second drive unit is preferably configured to link at least two to all eccentric units, causing the links to move together along the axial direction of the eccentric element between a first translational position and a second translational position. This allows for the use of a single second drive unit for multiple eccentric units. Furthermore, by linking the holding devices of multiple eccentric units, a uniform cycle rate for delivering packaging units in the delivery area can be achieved.

[0018] Preferably, at least some of the eccentric units are adjustable, allowing the relative spacing between the rotation axes of specific eccentric elements to be set. This enables the transfer device to easily adapt to different sizes of packaging units and / or different spacing between packaging units.

[0019] Alternatively or additionally, different sizes of packaging units and / or the spacing between packaging units can be adapted by adjusting the holding device and / or the suction grippers relative to a single bar or multiple bars.

[0020] A preferred improvement is that the holding device is configured to receive multiple packaging units. This further improves the productivity of the transfer device and reduces its cycle time. A suitable improvement provides that the holding device is configured to individually receive and / or deliver individual packaging units from among the multiple packaging units. Thus, the holding device can respond to vacancies in the receiving area, thereby facilitating efficient transfer without waiting time.

[0021] Preferably, the holding device is provided with at least one suction claw, which is versatile, can firmly support flat products, and has a very short response time for receiving and delivering packaging units. Alternatively, any other type of claw may be provided, such as a clamping claw or a Bernoulli claw.

[0022] The distance between the first translation position and the second translation position is preferably 30–800 mm, more preferably 40–700 mm, and particularly preferably 50–600 mm. This distance is measured along a direction parallel to the rotation axis of the eccentric element. When the distance is within the specified range, the transfer device can transfer various packaging units of different sizes, while the travel of the rod between the first and second translation positions remains relatively short.

[0023] The chord length between the retracted position and the operating position is preferably 10–200 mm, more preferably 20–150 mm, and particularly preferably 30–100 mm. When the chord length is within the specified range, the eccentric element has a compact structure and can accelerate and decelerate quickly, thereby having a positive impact on the cycle time.

[0024] The eccentric element is preferably rotatably mounted within an eccentric unit, and its shape is preferably cylindrical, especially preferably a shaft or a disc. Furthermore, the eccentric element can be manufactured using a split structure.

[0025] The eccentric element typically has one or more bearing sections, and more preferably two bearing sections, each arranged at an end region of the eccentric element along its own axis of rotation. At least one bearing section is further preferably concentrically arranged with the axis of rotation of the eccentric element. Each bearing section is preferably mounted by a radial bearing (e.g., a ball bearing) and supported by the housing of the eccentric unit.

[0026] Similarly, it is conceivable that the eccentric element adopts a split structure, specifically, the two bearing sections and the middle section can be manufactured as independent components and then joined together. Based on the split structure of the eccentric element, its manufacturing process can be significantly simplified and its cost greatly reduced.

[0027] In a preferred design, the eccentric element typically comprises two opposing shafts, disks, or plates with a connecting section between them. This connecting section is not coaxial with the rotation axis of the eccentric element. This connecting section is preferably cylindrical.

[0028] The eccentric element may also be equipped with counterweights to compensate for first-order and / or second-order moments of inertia. These measures enable the eccentric element to operate with virtually no vibration, thereby allowing the transfer device to achieve, for example, high transfer speeds.

[0029] The housing of the eccentric unit can be of one-piece or two-piece construction, with a two-piece construction being particularly preferred. A two-piece housing may include two mounting plates spaced apart from each other by spacer sleeves, each mounting plate preferably supporting a radial bearing for mounting the eccentric element. More preferably, the eccentric element extends through both mounting plates. At least the bearing section of the eccentric element preferably extends through each mounting plate, while its middle section extends between the mounting plates. Alternatively, the two mounting plates may have different structures, with only one mounting plate constructed to accommodate the first drive unit, thereby forming a particularly simple and lightweight housing structure.

[0030] Further preferably, the rod through-hole is completely parallel to the rotation axis of the eccentric element and passes through the eccentric element. The rod through-hole is preferably equipped with a radial-axial composite bearing, configured to provide simultaneous axial and rotational support to the rod body relative to the eccentric element.

[0031] The rod body preferably has a cylindrical cross-section, but its cross-section is not limited to a specific shape. If the rod body has a non-cylindrical cross-section, bearing elements can be provided to support the rod body axially, while radial bearings provide rotational support for the bearing elements together with the rod body.

[0032] The retaining device rotates about the rotation axis of the eccentric element in a first plane, which is preferably not stationary and can be moved by the linkage displacement between the rod and the retaining device. The retaining device preferably rotates about the rotation axis of the eccentric element with a distance defined by the rod through-hole.

[0033] The first drive unit can directly or indirectly drive the eccentric element to rotate, and it is preferably composed of a controllable stepper motor or a servo motor with a rotary encoder. This allows for the individual control or adjustment of the eccentric element, thereby maintaining the rotational position, speed, and angular acceleration of the device. The first drive unit preferably transmits rotational driving force to the eccentric element through a gear unit, which preferably uses a chain or toothed belt to transmit the driving torque and provides meshing force transmission. The application of gear units, especially gear units with reduction mechanisms, can generally increase the torque acting on the eccentric unit and improve the rotational positioning accuracy of the eccentric element.

[0034] The second drive unit is also composed of a stepper motor or a servo motor with a rotary encoder, which can control or adjust the displacement of the rod and the movement of the holding device parallel to the rotation axis of the eccentric element.

[0035] The receiving area and the delivery area are typically spaced apart in three-dimensional space, and their dimensions are suitable for accommodating at least one packaging unit each. The receiving area and delivery area are preferably static structures, but alternatively, at least one area may be a movable structure.

[0036] The receiving area and the delivery area can also be located on the same straight line in one-dimensional or two-dimensional direction.

[0037] The receiving area is preferably equipped with a continuously operating conveyor to transport the packaging units, or a cycle-type conveyor may be used. Alternatively, other continuously or cycle-type conveying or support mechanisms, or fixed conveying or support mechanisms, may be provided, each capable of independently defining the receiving area at a predetermined location.

[0038] The delivery area can be equipped with stacking shafts or other continuously operating, cycle-operating or fixed conveying or support mechanisms, each of which can independently define the delivery area at a predetermined location.

[0039] The rotation of the rod and the corresponding holding device can be continuous or rhythmic, or it can be unidirectional or segmented in reverse, thus allowing for the setting of various holding device movement modes.

[0040] The retracted position of the holding device is not preset to correspond with the operating position; it can be located at different points on the circular motion trajectory.

[0041] In the detailed embodiment described in the accompanying drawings, the operating position is located at the lower vertex of the circular motion, but it can also be located at other positions on the circumference, especially in reciprocating rotational motion.

[0042] The retraction position is also not preset. As shown in the attached embodiment, it is located at the upper vertex of the circular motion, but it can also be located at other positions on the circumference, which is especially suitable for reciprocating rotational motion.

[0043] Furthermore, the operating locations of the receiving area and the delivery area do not have to be the same; it is also possible to envision receiving and delivering packaging units at different levels of receiving and delivery.

[0044] In another aspect of the present invention, a method for transferring a packaging unit from a receiving area to a delivery area using the transfer device includes the following steps:

[0045] - The eccentric element is rotated by the first drive unit, causing the holding device to move to the operating position;

[0046] - Receive at least one packaging unit in the receiving area by means of a holding device;

[0047] - The eccentric element is rotated by the first drive unit, causing the holding device to move to the retracted position;

[0048] - The rod is moved from the first translational position to the second translational position by the second drive unit;

[0049] - The eccentric element is rotated by the first drive unit, causing the holding device to move to the operating position;

[0050] - Deliver at least one packaging unit in the delivery area using a holding device;

[0051] - The eccentric element is rotated by the first drive unit, causing the retaining device to move to the retracted position; and

[0052] - The rod is moved from the second translation position to the first translation position by the second drive unit.

[0053] This method enables easy transfer of packaging units in a very short cycle time.

[0054] The steps do not need to be completed sequentially; instead, the receiving and delivery steps are preferably performed during the rotational motion.

[0055] Similarly, preferably, the translational displacement of the rod overlaps with the rotational motion to save time.

[0056] The packaging unit can move continuously on the conveyor, and the movement of at least one eccentric unit can be synchronized with the movement of the packaging unit on the conveyor.

[0057] It should be clearly stated that all technical features described for the transfer device also apply to this method, and vice versa. Attached Figure Description

[0058] Figure 1 This is a schematic perspective view of the transfer device according to a first embodiment of the present invention during the movement of the eccentric element toward the operating position in the receiving area, wherein the holding device is in a first translational position.

[0059] Figure 2 for Figure 1 A schematic perspective view of the transfer device shown with the eccentric element in the operating position;

[0060] Figure 3 for Figure 1 The schematic perspective view of the transfer device shown during the movement of the device from a first translational position to a second translational position between the receiving area and the delivery area;

[0061] Figure 4 for Figure 1 The schematic perspective view of the conveying device is shown with the eccentric element in the operating position and the holding device in the first translational position, wherein there are different spacings between the individual packaging units on the conveying device;

[0062] Figure 5 This is a schematic perspective view of the transfer device according to a second embodiment of the present invention during the movement of the eccentric element toward the operating position in the receiving area, wherein the holding device is in a first translational position.

[0063] Figure 6 for Figure 5 A schematic perspective view of the transfer device shown, with the eccentric element in the operating position and the holding device in the second translational position within the delivery area;

[0064] Figure 7 This is a schematic perspective view of the transfer device according to a third embodiment of the present invention during the movement of the eccentric element toward the operating position within the receiving area, wherein the holding device is in a first translational position. Detailed Implementation

[0065] like Figure 1 The transfer device shown in the first embodiment of the present invention is applied in packaging machinery to transfer filled and sealed packaging units 3 from a conveying device 5 to a stacking shaft 7. The stacking shaft 7 is used to stack the packaging units 3 and sort them sequentially. The conveying device 5 continuously transports the packaging units 3 to the receiving area A.

[0066] Figure 1 When the stacking shaft 7 is unloaded, the packaging unit 3 is placed at a fixed position within the stacking shaft 7 each time. After each placement, the stacking shaft 7 preferably performs a descent motion, such as... Figure 3 The image shows stacked shaft 7 after it has been fully loaded and lowered.

[0067] The transfer device includes an eccentric unit 2, which has an eccentric element 9 that is rotated and driven by a first drive unit 11. The drive unit 11 is structured as follows: Figure 5 As shown.

[0068] The eccentric element 9 is provided with a rod 13, which is rotatably and displaceably mounted on the eccentric element 9. One end of the rod 13 is provided with a holding device 15, which is configured to receive and deliver the packaging unit 3. In this preferred embodiment, the holding device 15 is provided with an adsorption gripper 17.

[0069] The eccentric element 9 rotates about a rotation axis R, wherein a rod 13 extends parallel to the rotation axis R and is eccentrically mounted relative to the rotation axis R. The rod 13 passes through the eccentric element 9 via a rod through-hole 19, which is provided with a radial-axial composite bearing. This configuration allows the rod 13 to be axially displaced along the parallel rotation axis R and to be rotatably mounted, thereby ensuring that the orientation of the holding device 15 is independent of the rotational position of the eccentric element 9. The eccentric element 9 itself is rotatably mounted within the housing 21 of the eccentric unit 2 via a circumferential radial bearing 23. Figure 1 In the embodiment shown, the eccentric element 9 is constructed as a plate-shaped disk, which also serves as a bearing section 25. The outer circumference of the bearing section 25 is supported by a radial bearing 23, which is supported by the housing 21 of the eccentric unit 2.

[0070] In addition to the mounting structure within the eccentric element 9, the rod 13 is also mounted in another location in a manner that allows it to translate parallel to the rotatable axis R, a translation driven by the second drive unit 12. Possible configurations of the bearing element 32 used for the rod 13 will be discussed below. Figure 5 Detailed explanation.

[0071] Figure 1 In this state, the eccentric element 9 is moving toward the operating position, at which time the holding device 15 can receive the packaging unit 3 from the conveying device 5. In this state, the holding device 15 is located in the first translational position and positioned above the receiving area A.

[0072] Figure 2 As shown, Figure 1 The transfer device is in the operating position when the eccentric element 9 is in the operating position and the holding device 15 is in the first translational position. At this time, the suction gripper 17 contacts the packaging unit 3, ensuring that it is firmly grasped. Figure 1 It can be seen that the movement of the conveying device 5 is synchronized with the eccentric unit 2, that is, the position of at least one packaging unit 3 in the receiving area A is synchronized with the rotation of the holding device 15 around the rotation axis R and the axial movement parallel to the rotation axis R. The first drive unit 11 controls or adjusts the eccentric element 9 accordingly so that the eccentric element 9 is precisely in the operating position when the packaging unit 3 arrives at the receiving area A.

[0073] Figure 3 As shown, the holding device 15 is moving toward the second translational position. A stack 27 of the transfer packaging unit 3 has been formed within the stacking shaft 7, and the stacking shaft 7 is relatively... Figure 1-2 The indicated state further deteriorated. (This is to demonstrate the difference.) Figure 1 and Figure 2 For broader applications, the section of conveyor 5 shown in this design does not display the subsequent packaging unit 3. For example, this state may be in response to the rhythmic movement or high-speed motion of conveyor 5.

[0074] Figure 4 As shown, Figure 1 The eccentric unit 2 is in the operating position when the eccentric element 9 is in the operating position and the holding device 15 is in the first translational position, wherein there are differences in spacing T1, T2, and T3 between individual packaging units 3 on the conveying device 5. Based on the synchronization mechanism, the transfer device can compensate for the empty spaces on the conveying device 5, thereby achieving extremely high flexibility.

[0075] Figure 5 As shown, in the second embodiment of the present invention, the transfer device is in a state where the eccentric element 9 moves toward the operating position within the receiving area A, while the holding device 15 is in the first translational position. This embodiment is a variation of the first embodiment, therefore, the following will only refer to it in conjunction with the first embodiment. Figure 5 The differences between the two embodiments are discussed.

[0076] The housing 21 of the second embodiment adopts a split structure, which includes two mounting plates 39a and 39b, each mounting plate receiving a radial bearing 23 to rotatably support the eccentric element 9. The mounting plates 39a and 39b are spaced apart from each other by a number of spacer sleeves 37 to form a simple housing 21.

[0077] Furthermore, the first drive unit 11 drives the eccentric element 9 via a belt drive mechanism 31, the belt of which is wound around a section of the eccentric element 9. The belt drive mechanism 31 is of the meshing type, such as a toothed belt drive, to ensure that the first drive unit 11 achieves precise positioning of the eccentric element 9.

[0078] The eccentric element 9 here is a multi-piece structure, in which two bearing sections 25 are arranged on opposite sides of the eccentric element 9 along the rotation axis R, separated by a middle section 29. The cross-section of the middle section 29 is different from that of the bearing section 25; it is a cylindrical structure with its cylindrical axis parallel to the rotation axis R.

[0079] The rod through-hole 19 extends through both bearing sections 25 and the middle section 29. In this embodiment, at least part of the radial-axial composite bearing (not shown here) of the rod through-hole 19 can also be placed within the middle section 29. The eccentric unit 2 is also provided with a holding device 15 with multiple adsorption claws 17, which can correspondingly receive and deliver multiple packaging units 3.

[0080] Figure 5 Further demonstration: Two sets of linear guides 33a and 33b, serving as bearing elements 32, support the second end of the rod 13. These two sets of linear guides 33a and 33b are arranged perpendicularly to each other, with linear guide 33b connecting to a coupling rod 35. This coupling rod 35 is driven by the second drive unit 12 along the rotation axis R, causing the holding device 15 to shift between a first translational position and a second translational position. The linear guides 33a and 33b support the rod 13 in two mutually perpendicular directions, both perpendicular to the rotation axis R. Figure 5 It also shows that the coupling rod 35 is arranged perpendicular to the rod 13.

[0081] In the second embodiment, the size of the receiving area A is set to accommodate a specific number of packaging units 3, which corresponds to the number that the holding device 15 can receive simultaneously. The delivery area B is provided with two stacking shafts 7 arranged side by side.

[0082] exist Figure 6 middle, Figure 5 The transfer device is in the operating position with eccentric element 9 within delivery area B, while holding device 15 in the second translational position. (Combined) Figure 5 The movement trajectory of the holding device 15 between the first translational position and the second translational position is visible. Six packaging units 3 are fixed to the holding device 15 by suction grippers 17. In this embodiment, the holding device 15 is preferably configured to selectively receive and deliver the packaging units 3. Figure 6The display holding device 15 selectively places two packaging units 3 into two stacked shafts 7 side by side in the delivery area B, while the coupling rod 35, together with the linear guides 33a and 33b, can be seen to move axially along the rod 13.

[0083] exist Figure 7 In the third embodiment, the transfer device includes multiple components as in the second embodiment ( Figure 5-6 The eccentric unit 2 mentioned above.

[0084] Figure 7 The diagram shows the eccentric element 9 moving towards the operating position in the receiving area A while the holding device 15 is in the first translational position. This embodiment represents an advancement of the second embodiment by multiplying the number of transfer device components.

[0085] Multiple eccentric units 2 have rods 13 arranged in parallel to each other and connected to a coupling rod 35. A second linear guide rail 33b connects to the coupling rod 35, and a first linear guide rail 33a connects to each rod 13. Each eccentric unit 2 has an independent receiving area A and an independent delivery area B.

Claims

1. A transfer device for transferring packaging units from a receiving area to a delivery area, Its features are, The transfer device includes at least one eccentric unit, the eccentric unit comprising: A rotatably mounted eccentric element has a rod through hole that is spaced apart from the rotation axis of the eccentric element in the radial direction and extends parallel to the rotation axis of the eccentric element. A rod extends through the eccentric element and is rotatably and axially displaceable through the rod through-hole, wherein the rod through-hole has a radial-axial composite bearing configured to provide axial and rotational support for the rod relative to the eccentric element; A holding device, connected to the rod, and configured to receive at least one packaging unit; A first drive unit configured to drive the eccentric element to rotate, thereby moving the holding device between at least one retracted position and at least one operating position in a first plane perpendicular to the rotation axis of the eccentric element; and A second drive unit is configured to drive the rod to displace along the axial direction of the eccentric element between at least one first translational position and at least one second translational position, thereby moving the holding device parallel to the rotation axis of the eccentric element.

2. The transfer device according to claim 1, characterized in that: The rotational position of the retaining device remains unchanged during the rotation of the eccentric element.

3. The transfer device according to claim 1, characterized in that: The rod is rotatably and fixedly connected to a bearing element relative to its own axis, and the bearing element follows the rotation of the rod about a rotation axis, the rotation being generated by the rotation of the eccentric element.

4. The transfer device according to claim 1, characterized in that: The rod is hollow in at least some sections.

5. The transfer device according to claim 1, characterized in that: The first drive unit and the second drive unit can be controlled independently of each other.

6. The transfer device according to claim 5, characterized in that: The eccentric unit is configured to enable the holding device to simultaneously perform a motion parallel to the rotation axis of the eccentric element and a motion parallel to the first plane within at least a portion of the motion range.

7. The transfer device according to claim 1, characterized in that: It includes multiple eccentric units arranged side by side, such that the rotation axes of the multiple eccentric elements are arranged parallel to each other.

8. The transfer device according to claim 7, characterized in that: At least two to all the eccentric elements have rods that are coupled to each other.

9. The transfer device according to claim 7, characterized in that: The second drive unit is configured to actuate the axial displacement of the plurality of eccentric elements, such that the rods of at least two to all eccentric elements are displaced together between at least one first translational position and at least one second translational position.

10. The transfer device according to claim 1, characterized in that: The holding device is configured to receive multiple packaging units.

11. The transfer device according to claim 1, characterized in that: The holding device is provided with at least one adsorption gripper.

12. The transfer device according to claim 1, characterized in that: The distance between the first translation position and the second translation position is 30-800mm.

13. The transfer device according to claim 1, characterized in that: The chord length between the retracted position and the operating position is 10-200 mm.

14. A method for transferring a packaging unit from a receiving area to a delivery area using a transfer device. Its features are, The transfer device includes at least one eccentric unit, the eccentric unit comprising: A rotatably mounted eccentric element has a rod through hole that is spaced apart from the rotation axis of the eccentric element in the radial direction and extends parallel to the rotation axis of the eccentric element. A rod extends through the eccentric element and is rotatably and axially displaceable through the rod through-hole, wherein the rod through-hole has a radial-axial composite bearing configured to provide axial and rotational support for the rod relative to the eccentric element; A holding device, connected to the rod, and configured to receive at least one packaging unit; A first drive unit configured to drive the eccentric element to rotate, thereby moving the holding device between at least one retracted position and at least one operating position in a first plane perpendicular to the rotation axis of the eccentric element; and The second drive unit is configured to drive the rod to displace along the axial direction of the eccentric element between at least one first translational position and at least one second translational position, thereby moving the holding device parallel to the rotation axis of the eccentric element. The method is characterized by comprising the following steps: - The eccentric element is rotated by the first drive unit, causing the holding device to move to the operating position; - Receive at least one packaging unit in the receiving area by means of a holding device; - The eccentric element is rotated by the first drive unit, causing the holding device to move to the retracted position; - The rod is moved from the first translational position to the second translational position by the second drive unit; - The eccentric element is rotated by the first drive unit, causing the holding device to move to the operating position; - Deliver at least one packaging unit in the delivery area using a holding device; - The eccentric element is rotated by the first drive unit, causing the retaining device to move to the retracted position; and - The rod is moved from the second translation position to the first translation position by the second drive unit.

15. The method for transferring and packaging a unit according to claim 14, characterized in that: The packaging unit moves continuously on the conveying device, and the movement of the at least one eccentric unit is synchronized with the movement of the packaging unit on the conveying device.

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