Capping head for closing containers

Abstract

The invention relates, among other things, to a closing head (10) having a magnetic coupling (16) and an adjusting device (26) with a holding component (28), an adjusting component (44), a connecting component (36), and a locking component (46). The adjusting component (44) carries a first magnetic ring (18) of the magnetic coupling (16). The connecting component (36) adjustably holds the adjusting component (44) on the holding component (28) for adjusting the first magnetic ring (18) relative to a second magnetic ring (20) of the magnetic coupling (16) for adapting a maximum closing torque. The connecting component (36) is elastically prestressed to assume a holding position in which the connecting component (36) connects the adjusting component (44) to the holding component (28) in a rotationally fixed manner. The locking component (46) is elastically prestressed to assume a locking position in which the locking component (46) blocks the connecting component (36) in the holding position.

Description

Technical area

[0001] The invention relates to a closing head for a closing device for closing containers. The invention further relates to a method for adjusting a magnetic coupling of a closing head. Technical background

[0002] In beverage bottling plants, it is known to provide specially designed closing devices for closing containers with a screw cap, which can also be referred to as closers or screw closers. Such devices for closing a container with a screw cap can have a closing head with a closing element, in which a screw cap can be received to be screwed onto a container to close the container. The closing head can be rotated about a rotation axis and lowered onto the container to be closed perpendicular to the rotation axis so that the screw cap comes into contact with the container mouth. The rotation of the closing head unscrews the screw cap.

[0003] One type of capping head includes a magnetic coupling, which provides a rotational coupling between a drive element of the device, which provides the torque or rotation, and the capping element. Such magnetic couplings can be based on the principle of a hysteresis coupling. A plurality of magnetic elements, which are rotationally fixed to the drive element, can be positioned opposite a plurality of magnetic elements, which are rotationally fixed to the capping element.

[0004] For example, EP 1 387 812 A1 discloses a device for screwing a screw cap onto a container. The device comprises a magnetic coupling arranged between a drivable spindle and the capping head. An inductive detector for detecting the movement of the permanent magnets connected to the capping head is provided in the circulating area of ​​the permanent magnets.

[0005] The invention is based on the object of providing an improved adjustment of a magnetic coupling of a closing head for adapting a maximum closing torque. Summary of the invention

[0006] The problem is solved by the features of the independent claims. Advantageous further developments are specified in the dependent claims and the description.

[0007] One aspect of the present disclosure relates to a (e.g., screw) closing head for a (e.g., rotary) closing device for closing containers. The closing head has a magnetic coupling with a first, preferably outer, magnetic ring (hysteresis ring) and a second, preferably inner, magnetic ring, which magnetically interact with each other to transmit a torque. The closing head has an adjustment device with a (e.g., driven) holding component, an adjustment component, a connecting component, and a locking component. The adjustment component supports the first magnetic ring (e.g., with a rotationally fixed connection between the adjustment component and the first magnetic ring). The connecting component holds the adjustment component (e.g., vertically) adjustable on the holding component for adjusting the first magnetic ring relative to the second magnetic ring to adapt a maximum closing torque.The connecting component is elastically preloaded to assume a holding position in which the connecting component connects the adjustment component to the holding component in a rotationally fixed manner. The locking component is elastically preloaded to assume a locking position in which the locking component blocks the connecting component in the holding position.

[0008] The adjustment device can advantageously make adjusting the closing torque, which is traditionally a time-consuming and cumbersome process, much easier. The closing torque can be adjusted without tools. This makes it easy to change the closing torque when changing brands. For example, it is no longer necessary, as is traditional, to loosen a screw element using a tool and then tighten it again after adjustment. Conventional technology is particularly complex and error-prone in the case of closing devices with multiple closing heads. If the screw elements are not tightened as specified, this can result in damage to the internal ball bearing, for example. Furthermore, there is no need to tap the machine to reach the screw elements, which is advantageous because this process is very error-prone (one or more closing heads can easily be forgotten).

[0009] In one embodiment, the connecting component is a resilient pressure piece. Optionally, the connecting component can be resiliently supported on the locking component, preferably on the inside of the locking component. Advantageously, the resilient pressure piece can enable a finely incremented adjustment of the locking torque.

[0010] In a further embodiment, the connecting component has a first, preferably inner, pin, which bears (e.g., inside) against the locking component, and a second, preferably outer, pin, which bears (e.g., outside) against the holding component (e.g., in a groove path of the holding component) and is preferably arranged coaxially with the first pin. Optionally, the connecting component can have an elastic element, preferably a helical compression spring, which elastically supports the second pin on the first pin and is preferably arranged coaxially with the first pin and the second pin. Preferably, the elastic element can elastically preload the connecting component (e.g., its second pin) to assume the holding position. This advantageously enables a design of the connecting component that, on the one hand, enables secure and reliable locking and, on the other hand, enables finely incremented adjustment of the closing torque.

[0011] In one embodiment, the locking component has a groove in which the first pin is guided. Alternatively or additionally, the locking component has a recess for partially accommodating the second pin outside the locking position of the locking component to release the connecting component. Advantageously, this allows the connecting component to be securely guided and held in position, while also allowing it to be reliably and easily locked and unlocked.

[0012] In a further embodiment, the closing head has a stop element arranged to limit the mobility (e.g., in the locking position and / or an unlocking position) of the locking component, preferably attached to the adjustment component and / or engaging in an elongated hole in the locking component. This advantageously simplifies operation of the adjustment device and prevents malfunctions.

[0013] In one embodiment, the closing head has at least one spacer that keeps the adjustment component and the holding component at a distance to create a preferably annular cleaning gap between the adjustment component and the holding component. This can advantageously improve the cleaning ability of the adjustment device.

[0014] In a further embodiment, the closing head comprises a helical spring that elastically supports the locking component for assuming the locking position against a preferably circumferential collar portion on the first magnetic ring and preferably coaxially surrounds the first magnetic ring. This advantageously enables reliable and space-saving elastic preloading of the locking component.

[0015] In one embodiment, the locking component has at least one cleaning opening through which the adjustment component, the holding component, and / or a preferably annular cleaning gap between the adjustment component and the holding component are accessible from the outside for supplying cleaning fluid. Alternatively or additionally, the adjustment component has at least one cleaning opening through which the holding component and / or a preferably annular cleaning gap between the adjustment component and the holding component are accessible from the outside for supplying cleaning fluid. This advantageously enables thorough cleaning of the capping head without the need to remove and possibly disassemble the capping head.

[0016] In a further embodiment, magnets of the first magnetic ring are encapsulated, and / or magnets of the second magnetic ring are encapsulated. Alternatively or additionally, a sleeve-shaped (e.g., thin-walled) metal sheet, preferably stainless steel sheet, covers magnets of the first magnetic ring on an inner circumferential side of the magnets, and / or a (e.g., further) sleeve-shaped (e.g., thin-walled) metal sheet, preferably stainless steel sheet, covers magnets of the second magnetic ring on an outer circumferential side of the magnets. This advantageously allows a protected arrangement of the magnets to be achieved, so that they cannot be affected, for example, by cleaning fluid.

[0017] In one embodiment, the first magnetic ring is adjustable by the adjustment device to increase overlap with the second magnetic ring to increase the maximum closing torque in a downward direction and / or towards a closing element of the closing head. This advantageously prevents, as is conventional, the unwanted covering of a closing element by a magnetic ring (hysteresis ring) when set for a low closing torque. Furthermore, this can be advantageous when using a gripper head that has more space and can therefore be significantly shorter. By reversing the adjustment direction, the adjustment travel can also be increased, resulting in a larger torque range. Furthermore, it is possible for both magnetic rings to completely overlap at the maximum setting, which was not possible conventionally.

[0018] In a further embodiment, the connecting component is mounted axially movably in the adjustment component. Alternatively or additionally, the connecting component can be movable in a radial direction relative to a longitudinal center axis of the closing head from the holding position for adjusting the adjustment component and the first magnetic ring toward the holding component, preferably pressed out of the holding component, when the locking component does not block the connecting component in the holding position. Advantageously, the first magnetic ring can thus be rotated stepwise with fine pitch, and the closing torque can be changed.

[0019] In one embodiment, the locking component is movable parallel to or rotatable about a longitudinal center axis of the closing head between the locking position and an unlocking position, in which the connecting component is released to leave the holding position. This advantageously allows for a simple, tool-free unlocking and locking of the connecting component, and thus of the adjustment component and the first magnetic ring.

[0020] In one embodiment, the adjusting component can be rotated, preferably helically, around the holding component in the unlocked position of the locking component, wherein upon rotation of the adjusting component, the connecting component is pressed out of the holding position by the holding component against its elastic prestress. Alternatively or additionally, an outer circumferential surface of the holding component has a preferably helical groove track into which the connecting component engages. Optionally, a groove base of the groove track can have several recesses arranged one behind the other, preferably rounded, along a longitudinal path of the groove track for engagement by the connecting component in the holding position. This advantageously enables the step-by-step adjustment of the closing torque with fine increments.

[0021] In one embodiment, the locking component, the adjusting component, and / or the holding component are arranged coaxially with one another (and, for example, with a longitudinal center axis of the closing head). Alternatively or additionally, the locking component, the adjusting component, and / or the holding component are sleeve-shaped. Alternatively or additionally, the connecting component is pin-shaped.

[0022] In a further embodiment, the closing head further comprises at least one of: a drive element, preferably a drive shaft, which is drivingly connected to the holding component; a rotary bearing which rotatably connects the holding component and the second magnetic ring; and a closing element, preferably a closing cone, which is carried on the second magnetic ring.

[0023] A further aspect of the present disclosure relates to a method for adjusting a magnetic coupling of a closing head as disclosed herein. The method comprises manually moving (e.g., downwards) the locking component against its elastic prestress from the locking position into an unlocking position to release the mobility of the connecting component and thus the rotatability of the adjusting component. The method further comprises (e.g., stepwise) manual, preferably helical, rotation of the adjusting component around the holding component to adjust the first magnetic ring relative to the second magnetic ring to a desired adjustment position. Upon manual rotation of the adjusting component, the released connecting component is pressed out of the holding position by the holding component against its elastic prestress.The released connecting component moves back into the holding position under the elastic preload in the desired adjustment position. The method further comprises moving the locking component back into the locking position, so that the connecting component is again locked in the holding position. Advantageously, the method can achieve the same advantages as those already explained with reference to the closing head.

[0024] A further aspect of the present disclosure relates to a container treatment system (e.g., for tempering, manufacturing, cleaning, coating, testing, filling, closing, pasteurizing, labeling, printing, marking, laser marking, and / or packaging containers for liquid or pasty media, preferably beverages, liquid foodstuffs, or products from the pharmaceutical or healthcare industry). The container treatment system may comprise a (e.g., rotary) closing device with at least one closing head as disclosed herein.

[0025] For example, the containers can be designed as bottles, cans, canisters, cartons, flacons, tubes, etc.

[0026] The previously described preferred embodiments and features of the invention can be combined with one another as desired. Short description of the characters

[0027] Further details and advantages of the invention are described below with reference to the accompanying drawings. They show: Figure 1 is a perspective view of a portion of a capping head according to an embodiment of the present disclosure; Figure 2 is a sectional view of a portion of the exemplary capping head; and Figure 3 is a perspective view of a detail of the sectional view of Figure 2 .

[0028] The embodiments shown in the figures correspond at least partially, so that similar or identical parts are provided with the same reference numerals and for their explanation reference is also made to the description of the other embodiments or figures in order to avoid repetition. Detailed description of exemplary embodiments

[0029] The Figure 1shows a closing head 10 for a closing device for closing containers. Preferably, the closing head 10 can close a container with a screw cap.

[0030] The closing device can have one closing head 10 or preferably several closing heads 10 for the simultaneous or temporally overlapping closing of several containers. The closing device can be, for example, a rotary closing device. The closing heads 10 can be arranged distributed around a circumference of a closing carousel of the closing device. Alternatively, the closing device can be, for example, a linear closing device, e.g., with several closing heads 10 arranged in a row next to one another or one behind the other.

[0031] For example, the closing device can be incorporated into a container treatment system. The closing device can be arranged downstream of, or integrated with, a filling device for filling the containers with a liquid or pasty filling material.

[0032] The capping head 10 is shown below with reference to the Figures 1 to 3 described in more detail by way of example.

[0033] The closing head 10 has a magnetic coupling 16 and an adjusting device 26. Preferably, the closing head 10 can also have, for example, a drive element 12 and a closing element 14 (only in Figure 1 shown).

[0034] The drive element 12 can be driven in any suitable manner, e.g., by means of an electric drive unit. The drive element 12 can have a vertical axis of rotation. The drive element 12 can preferably be a shaft, preferably a hollow shaft.

[0035] The drive element 12 can be connected to the magnetic coupling 16 for transmitting a drive torque to the closing element 14. Specifically, the drive element 12 can be connected to a drive side of the magnetic coupling 16. For example, the drive element 12 can be drivingly connected to the magnetic coupling 16 via the adjustment device 26.

[0036] The closure element 14 may have a closure receptacle. A screw cap received in the closure receptacle can be screwed onto a container by rotating the closure element 14.

[0037] The closing element 14 is preferably designed as a, preferably toothed, closing cone. An elastic retaining ring for holding a screw cap can be arranged at the lower end of the closing element 14, for example.

[0038] The closure element 14 can receive a drive torque from the magnetic coupling 16. The closure element 14 can be connected to an output side of the magnetic coupling 16. The closure element 14 can, for example, be supported on the output side of the magnetic coupling 16.

[0039] The magnetic coupling 16 can also be referred to as a hysteresis coupling. The magnetic coupling 16 has a first magnetic ring 18 and a second magnetic ring 20.

[0040] The first magnetic ring 18 can be an outer magnetic ring, and the second magnetic ring 20 can be an inner magnetic ring. The first magnetic ring 18 can be arranged outside the second magnetic ring 20 or surround the second magnetic ring 20. The magnetic rings 18, 20 can be arranged coaxially to a longitudinal center axis L of the capping head 10. The magnetic rings 18, 20 can be spaced apart from each other by an air gap. The magnetic rings 18 and 20 can be mounted rotatably relative to each other.

[0041] The first magnetic ring 18 and the second magnetic ring 20 interact magnetically with each other to transmit a torque. The transmitted torque can drive the closure element 14 to screw a screw cap onto a container. The closure element 14 can be supported, preferably internally, on the second magnetic ring 20.

[0042] The magnetic rings 18, 20 can each have a plurality of permanent magnets arranged in a circumferential direction around the longitudinal center axis L. The permanent magnets can, for example, be oriented vertically.

[0043] The magnets of the first magnetic ring 18 are preferably encapsulated. The magnets can be completely enclosed by a housing of the first magnetic ring 18. The housing can preferably comprise a sleeve-shaped metal sheet 22. The metal sheet 22 can preferably be a stainless steel sheet. The metal sheet 22 can cover the magnets of the first magnetic ring 18 on an inner peripheral side of the magnets. The inner peripheral side can be directed toward the second magnetic ring 20.

[0044] Alternatively or additionally, the magnets of the second magnetic ring 20 can be encapsulated. The magnets can be completely enclosed by a housing of the second magnetic ring 20. The housing can preferably comprise a sleeve-shaped metal sheet 24. The metal sheet 24 can preferably be a stainless steel sheet. The metal sheet 24 can cover the magnets of the second magnetic ring 20 on an outer peripheral side of the magnets. The outer peripheral side can be directed toward the first magnetic ring 18.

[0045] The first magnetic ring 18 can be connected in a rotationally fixed manner to the drive element 12. The second magnetic ring 20 can be connected in a rotationally fixed manner to the closure element 14.

[0046] Below a maximum closing torque (break-off torque) that can be predetermined by a relative arrangement between the first and second magnetic rings 18, 20, torque can be transmitted from the drive element 12 via the magnetic coupling 16 to the closing element 14 due to the magnetic force generated between the magnetic rings 18, 20. If the maximum closing torque is reached or exceeded, the magnetic holding force between the magnetic rings 18 and 20, and thus between the drive element 12 and the closing element 14, breaks down. The closing element 14 can slide essentially evenly relative to the drive element 12. This can ensure, for example, that a screw cap is screwed onto the container with a predetermined maximum closing torque.

[0047] The adjustment device 26 can adjust a relative arrangement between the first magnetic ring 18 and the second magnetic ring 20. By means of the adjustment device 26, a relative arrangement between the first and second magnetic rings 18, 20 can be changed to adjust the maximum closing torque. The relative arrangement can refer to an axial overlap of the magnetic rings 18, 20 with respect to the longitudinal center axis L or an overlap (covering) of the magnetic rings 18, 20 in a radial viewing direction relative to the longitudinal center axis L.

[0048] Preferably, the adjustment device 26 can enable the first magnetic ring 18 to be adjusted in a downward direction toward the closing element 14 to increase the overlap with the second magnetic ring 20 and to increase the maximum closing torque. On the other hand, the adjustment device 26 can enable the first magnetic ring 18 to be adjusted in an upward direction away from the closing element 14 to decrease the overlap with the second magnetic ring 20 and to reduce the maximum closing torque.

[0049] The adjusting device 26 has a holding component 28, a connecting component 36, an adjusting component 44 and a locking component 46.

[0050] Preferably, the holding component 28, the adjusting component 44, and the locking component 46 are arranged coaxially with one another and with the longitudinal center axis L. Preferably, the holding component 28, the adjusting component 44, and / or the locking component 46 can each be sleeve-shaped. Preferably, the connecting component 36 is pin-shaped.

[0051] The holding component 28 can be connected to the drive element 12 in a rotationally fixed manner. For example, the holding component 28 can be connected to the drive element 12 in a force-locking and / or form-locking manner. It is also possible for the holding component 28 and the drive element 12 to be connected to one another in one piece.

[0052] An outer peripheral surface of the holding component 28 can have a grooved track 30. The grooved track 30 preferably extends helically around the longitudinal central axis L. A groove bottom of the grooved track 30 can have a plurality of recesses 32 along a longitudinal extension of the grooved track 30. The recesses 32 are preferably designed as rounded depressions, e.g., in the shape of a spherical segment. The recesses 32 can be arranged in a row one behind the other along the longitudinal extension of the grooved track 30.

[0053] The holding member 28 can support the first magnetic ring 18. Specifically, the holding member 28 can support the first magnetic ring 18 via the connecting member 36 and the adjusting member 44.

[0054] The holding component 28 can support the second magnetic ring 20. Specifically, the holding component 28 can support the second magnetic ring 20 via a pivot bearing 34. The pivot bearing 34 can rotatably connect the holding component 28 and the second magnetic ring 20. The pivot bearing 34 can be arranged in an interior of the holding component 28. The pivot bearing 34 can be, for example, a ball bearing, preferably an angular contact ball bearing.

[0055] The holding member 28 can support the closure element 14. In detail, the holding member 28 can support the closure element 14 via the pivot bearing 34 and the second magnetic ring 20.

[0056] The connecting component 36 adjustably holds the adjusting component 44 on the holding component 28 for adjusting the first magnetic ring 18 relative to the second magnetic ring 20 for adjusting the maximum closing torque.

[0057] Preferably, the connecting component 36 is a resilient push piece. For example, the connecting component 36 can have a first pin 38, a second pin 40, and an elastic element 42.

[0058] The connecting component 36 can preferably be aligned perpendicular to the longitudinal center axis L. For example, the pins 38, 40 can be aligned perpendicular to the longitudinal center axis L.

[0059] Preferably, the pins 38, 40 and optionally the elastic element 42 are arranged coaxially with each other. The pins 38 and 40 can be movable relative to each other.

[0060] Preferably, the first pin 38 can be an inner pin. The second pin 40 can preferably be an outer pin. For example, the first pin 38 and / or the elastic element 42 can be received in a hole, preferably a blind hole, in the second pin 40. Preferably, the elastic element 42 is arranged between the first pin 38 and the second pin 40. For example, the elastic element 42 can surround the first pin 38. Preferably, the elastic element 42 is a helical compression spring.

[0061] The connecting component 36 can be mounted axially movable (displaceable) in the adjustment component 44. Preferably, the connecting component 36 can be movable in a radial direction relative to the longitudinal center axis L.

[0062] The adjustment component 44 can, for example, have a through-hole in which the connecting component 36 is mounted for axial movement. It is possible, for example, for a sliding bushing to be arranged in the through-hole. The connecting component 36 can extend through this sliding bushing. Specifically, the second pin 40 can preferably be mounted for axial movement in the adjustment component 44, preferably in the sliding bushing of the adjustment component 44.

[0063] The connecting component 36 can abut the locking component 46 and the holding component 28 at opposite ends. For example, one end (a head) of the first pin 38 can abut an inner peripheral side of the locking component 46. For example, the second pin 40 can abut the holding component 28. Preferably, an end region of the second pin 40 protrudes into the groove track 30.

[0064] In a holding position of the connecting component 36, the connecting component 36 connects the adjustment component 44 to the holding component 28 in a rotationally fixed manner. In the holding position, the connecting component 36 can engage in one of the recesses 32 of the groove track 30. Preferably, a front end of an end region of the second pin 40 can engage in one of the recesses 32 of the groove track 30 when the connecting component 36 is in the holding position.

[0065] The connecting component 36 is elastically preloaded to assume a holding position. For example, the elastic element 42 can elastically support the second pin 40 against the first pin 38. Preferably, the elastic element 42 can press the second pin 40 into the groove track 30.

[0066] Preferably, the connecting component 36 can be resiliently supported on the locking component 46, preferably on the inside of the locking component. Specifically, for example, the elastic element 42 can be supported on the first pin 38, which in turn can be supported on an inner circumferential side of the locking component 46.

[0067] The adjustment component 44 supports the first magnetic ring 18. For example, the adjustment component 44 can support the first magnetic ring 18 at a lower end of the adjustment component 44. The adjustment component 44 and the first magnetic ring 18 can be connected to one another in a rotationally fixed manner.

[0068] For example, the adjustment component 44 and the first magnetic ring 18 can be connected to each other in one piece. It is also possible for the adjustment component 44 and the first magnetic ring 18 to be fastened to each other, for example, in a form-fitting or force-fitting manner.

[0069] Preferably, the adjustment component 44 can be arranged outside of the holding component 28 and / or inside of the locking component 46.

[0070] By adjusting the adjustment component 44 relative to the holding component 28, the first magnetic ring 18 can be adjusted relative to the second magnetic ring 20. Preferably, a height adjustment of the first adjustment component 44 relative to the holding component 28 can cause a height adjustment of the first magnetic ring 18 relative to the second magnetic ring 20.

[0071] Specifically, provided the connecting component 36 is not blocked in the holding position, the adjusting component 44 can be rotated, preferably helically, around the holding component 28. The preferably helical rotation can be guided by the connecting component 36 guided in the groove track 30. Upon rotation of the adjusting component 36, the (unlocked) connecting component 36 can be pushed out of the holding position by the holding component 28 against its elastic pretension by the elastic element 42. The helical rotation of the adjusting component 44 around the holding component 28 preferably results in a height adjustment of the adjusting component 44 relative to the holding component 28. This can result in a relative height adjustment of the first magnetic ring 18 to the second magnetic ring 20, whereby the maximum closing torque can be adjusted.

[0072] For example, a clockwise, preferably helical, rotation of the adjustment component 44 around the holding component 28 can lead to a lowering of the adjustment component 44 relative to the holding component 28, and a counterclockwise, preferably helical, rotation of the adjustment component 44 around the holding component 28 can lead to a raising of the adjustment component 44 relative to the holding component 28 (or vice versa).

[0073] Preferably, lowering the adjustment component 44 relative to the holding component 28 can lead to a lowering of the first magnetic ring 18 relative to the second magnetic ring 20, whereby an overlap of the first and second magnetic rings 18 and 20 can preferably be increased. On the other hand, raising the adjustment component 44 relative to the holding component 28 can preferably lead to a lifting of the first magnetic ring 18 relative to the second magnetic ring 20, whereby an overlap of the first and second magnetic rings 18 and 20 can preferably be reduced.

[0074] The locking component 46 is elastically preloaded to assume a locking position. In the locking position, the locking component 46 blocks the connecting component 36 in the holding position.

[0075] Preferably, the locking component 46 can be elastically preloaded by an elastic element, e.g., a coil spring 48. The coil spring 48 is preferably a helical compression spring.

[0076] The coil spring 48 is preferably arranged below the locking component 46. The coil spring 48 can, for example, be arranged coaxially with the longitudinal center axis L and the first magnetic ring 18. The coil spring 48 can preferably surround the first magnetic ring 18.

[0077] Preferably, the helical spring 48 can be supported on the one hand on a lower end of the locking component 46. Preferably, the helical spring 48 can be supported on the other hand on a collar portion 50. The collar portion 50 is preferably a circumferential collar portion. For example, the collar portion 50 can be arranged on the first magnetic ring 18, for example circumferentially and / or at a lower end of the first magnetic ring 18.

[0078] Preferably, the locking component 46 can be manually movable parallel to the longitudinal center axis L between the locking position and an unlocking position. In the unlocking position, the locking component 46 can release the connecting component 36 to leave the holding position. Preferably, the locking component 46 can be moved vertically downward from the locking position to the unlocking position.

[0079] However, it is also possible for the locking component 46 to be movable from the locking position to the unlocking position in another manner. For example, the locking component 46 can be rotated from the locking position to the unlocking position.

[0080] Preferably, the locking component 46 may have a recess 52, as shown for example in the Figures 2 and 3 is shown. The recess 52 can preferably be designed as a trough- or bowl-shaped depression, for example. The recess 52 is preferably arranged on an inner peripheral side of the locking component 46.

[0081] The recess 52 can preferably be arranged and dimensioned such that it can partially accommodate the second pin 40 of the connecting component 36 only when the locking component 46 is in the unlocked position. Specifically, in the unlocked position, an end region of the second pin 40 facing the locking component 46 can preferably be accommodated in the recess 52.

[0082] For example, the recess 52 may have a depth that is greater than or equal to a depth of the recesses 32. Preferably, the recess 52 may have a width that is greater than or equal to a width of the connecting component 36 and / or the second pin 40. Preferably, the recess 52 may be arranged in an upper half of the locking component 46.

[0083] Preferably, the locking component 46 positioned in the unlocking position can release the, preferably helical, rotation of the adjusting component 44, since the connecting component 36 (e.g. its second pin 40) can be pressed out of the holding position and into the recess 52 by the holding component 28 when the adjusting component 44 is rotated, counter to its elastic prestress.

[0084] On the other hand, the locking component 46 positioned in the locking position can block the rotation of the adjusting component 44, since the connecting component 36 (e.g. its second pin 40) cannot be pressed out of the holding position into the recess 52 when the adjusting component 44 is rotated, contrary to its elastic prestressing by the holding component 28.

[0085] Preferably, the locking component 46 may further comprise a groove 54, as also shown by way of example in the Figures 2 and 3is shown. The groove 54 can preferably be designed as a longitudinal groove. The groove 54 can preferably be arranged on an inner peripheral side of the locking component 46.

[0086] Preferably, the groove 54 can be arranged in a lower half of the locking component 46. The groove 54 can, for example, merge into the recess 52.

[0087] Preferably, the groove 54 can be vertically oriented. For example, one end (head) of the first pin 38 can be guided in the groove 54.

[0088] For example, the groove 54 may have a width that is smaller than a width of the recess 52. Preferably, the groove 54 may have a width that is greater than or equal to a width of the end of the first pin 38. Preferably, the groove 54 may have a depth that corresponds to a depth of the recess 52.

[0089] The mobility of the locking component 46 between the locking position and the unlocking position can be limited by a stop element 56. The stop element 56 can preferably limit both the locking position and the unlocking position.

[0090] For example, the stop element 56 can be pin-shaped or screw-shaped. The stop element 56 is preferably oriented perpendicular to the longitudinal center axis L.

[0091] The stop element 56 is preferably attached to the adjustment component 44. For example, the stop element 56 can be attached, for example, screwed, into a blind or through hole of the adjustment component 44.

[0092] The stop element 56 preferably engages in an elongated hole 58 of the locking component 46. The elongated hole 58 is preferably vertically oriented. An upper end of the elongated hole 58 can, for example, define the unlocked position of the locking component 46. A lower end of the elongated hole 58 can, for example, define the locked position of the locking component 46.

[0093] Preferably, the stop element 56 can also connect the locking component 46 and the adjustment component 44 to one another in a rotationally fixed manner, e.g., by engaging in the elongated hole 58.

[0094] Optionally, the adjustment component 44 and the holding component 28 can be spaced apart from one another. Specifically, an inner peripheral side of the adjustment component 44 and an outer peripheral side of the holding component 28 can be spaced apart from one another. Preferably, a (cleaning) gap can be formed between the holding component 28 and the adjustment component 44. The cleaning gap can extend over the entire height of the adjustment component 44 and the holding component 28.

[0095] For example, the adjustment device 26 may include at least one spacer 60. The at least one spacer 60 may keep the adjustment component 44 and the holding component 28 at a distance to create a cleaning gap between them.

[0096] The at least one spacer 60 can, for example, be fastened in or on one of the holding component 28 and the adjusting component 44, e.g., screwed, pressed, or glued, or be integrally connected in one piece and slidingly contact the other of the holding component 28 and the adjusting component 44.

[0097] Preferably, a plurality of spacers 60 can be included. The plurality of spacers 60 can, for example, be arranged distributed in a circumferential direction around the longitudinal center axis L and / or spaced apart from one another with respect to the longitudinal center axis L.

[0098] Optionally, the adjustment component 44 and / or the locking component 46 can have at least one cleaning opening 62, 64. The at least one cleaning opening 62, 64 can be arranged, for example, below the connecting component 36. Preferably, the cleaning gap between the adjustment component 44 and the holding component 28 can be accessible from the outside via the at least one cleaning opening 62, 64 and can thus be reached with cleaning fluid supplied from the outside.

[0099] One cleaning opening 62 of the adjustment component 44 and one cleaning opening 64 of the locking component 46 can be aligned with each other, e.g., when the locking component 46 is in the locking position.

[0100] The at least one cleaning opening 62, 64 can, for example, be rectangular.

[0101] The at least one cleaning opening 62, 64 can preferably extend over at least one-third or at least one-half of the total height of the adjustment component 44 or the locking component 46. The at least one cleaning opening 62, 64 can preferably extend over an angular range of at least 15°, at least 20°, at least 25°, or at least 30° in a circumferential direction relative to the longitudinal center axis L.

[0102] Preferably, a plurality of cleaning openings 62 and / or 64 can be included. The plurality of cleaning openings 62 and / or 64 can, for example, be arranged distributed in a circumferential direction around the longitudinal center axis L and / or spaced apart from one another with respect to the longitudinal center axis L.

[0103] The following is the method for adjusting the magnetic coupling 16 made possible by the closing head 10 with reference to the Figures 1 to 3 explained.

[0104] First, the locking component 46 can be manually moved from the locking position to the unlocking position. Preferably, the locking component 46 can be displaced, e.g., downwards. As already explained, an alternative, for example, the locking component 46 could be manually rotated from the locking position to the unlocking position. The manual movement of the locking component 46 occurs against the elastic preload of the locking component 46, which is effected, for example, by the helical spring 48. In the unlocking position, the mobility of the connecting component 36 and thus the preferably helical rotation of the adjusting component 44 is enabled.

[0105] While the locking component 46 can be held in the unlocked position, the adjustment component 44 can be manually rotated, preferably helically, around the holding component 28 to adjust the first magnetic ring 18 relative to the second magnetic ring 20 to a desired adjustment position. Preferably, the locking component 46 can rotate along with it. Upon manual rotation of the adjustment component 44, the released connecting component 36 can be pressed out of the holding position by the holding component 28 against its elastic prestress by the elastic element 42. Specifically, the second pin 40 can preferably be pressed out of a recess 32 and, in the process, can be inserted / pressed into the recess 52 at an opposite end of the second pin 40.

[0106] In the desired adjustment position (and possibly in any intermediate position with its own recess 32 on the way to the adjustment position), the released connecting component 36 can move back into the holding position under the elastic preload of the elastic element 42. Specifically, the second pin 40 can preferably be pressed out of the recess 52 under the elastic preload of the elastic element 42 and, in the process, can be inserted / pressed into the recess 32 at an opposite end of the second pin 40.

[0107] In the desired adjustment position, the locking component 36 can then be moved back into the locking position, for example, manually and / or by means of elastic preload, e.g., by the coil spring 48. This allows the connecting component 36 to be locked in the holding position again. This advantageously results in a rotationally fixed connection between the holding component 28, the connecting component 36, the adjustment component 44, and the first magnetic ring 18.

[0108] The invention is not limited to the preferred embodiments described above. Rather, a multitude of variants and modifications are possible which also make use of the inventive concept and therefore fall within the scope of protection. In particular, the invention also claims protection for the subject matter and features of the subclaims, independent of the claims referred to. In particular, the individual features of independent claim 1 are each disclosed independently of one another. In addition, the features of the subclaims are also disclosed independently of all features of independent claim 1 and, for example, independently of the features relating to the presence and / or configuration of the magnetic coupling, the adjusting device, the holding component, the adjusting component, the connecting component and / or the locking component of independent claim 1.All ranges stated herein are to be understood as being disclosed in such a way that all values ​​falling within the respective range are disclosed individually, e.g., also as preferred narrower outer limits of the respective range. List of reference symbols

[0109] 10Closing head 12Drive element 14Closing element 16Magnetic coupling 18First magnetic ring 20Second magnetic ring 22Metal sheet 24Metal sheet 26Adjustment device 28Holding component 30Groove track 32Recess 34Pivot bearing 36Connecting component 38Pin 40Pin 42Elastic element 44Adjustment component 46Locking component 48Coil spring 50Collar section 52Recess 54Groove 56Stop element 58Elongated hole 60Spacer 62Cleaning opening 64Cleaning opening Longitudinal center axis

Claims

1. A closing head (10) for a closing device for closing containers, comprising: a magnetic coupling (16) with a first, preferably outer, magnetic ring (18) and a second, preferably inner, magnetic ring (20), which magnetically interact with each other to transmit a torque; and an adjusting device (26) with a holding component (28), an adjusting component (44), a connecting component (36), and a locking component (46), wherein: - the adjusting component (44) supports the first magnetic ring (18); - the connecting component (36) adjustably holds the adjusting component (44) on the holding component (28) for adjusting the first magnetic ring (18) relative to the second magnetic ring (20) to adapt a maximum closing torque; - the connecting component (36) is elastically prestressed to assume a holding position in which the connecting component (36) connects the adjusting component (44) to the holding component (28) in a rotationally fixed manner;and - the locking component (46) is elastically prestressed to assume a locking position in which the locking component (46) blocks the connecting component (36) in the holding position; 2. Closing head (10) according to claim 1, wherein: the connecting component (36) is a resilient push piece, and optionally the connecting component (36) is resiliently supported on the locking component (46), preferably internally on the locking component (46).

3. Closing head (10) according to claim 1 or claim 2, wherein the connecting component (36) comprises: a first, preferably inner, pin (38) which bears against the locking component (46), a second, preferably outer, pin (40) which bears against the holding component (28) and is preferably arranged coaxially with the first pin (38); and an elastic element (42), preferably a helical compression spring, which elastically supports the second pin (40) on the first pin (38) and is preferably arranged coaxially with the first pin (38) and the second pin (40).

4. Closing head (10) according to claim 3, wherein the locking component (46) comprises: a groove (54) in which the first pin (38) is guided; and / or a recess (52) for partially receiving the second pin (40) outside the locking position of the locking component (46) for releasing the connecting component (36).

5. Closing head (10) according to one of the preceding claims, further comprising at least one of: a stop element (56) arranged to limit the mobility of the locking component (46), preferably fastened to the adjustment component (44) and / or engaging in an elongated hole (58) of the locking component (46); at least one spacer (60) which keeps the adjustment component (44) and the holding component (28) at a distance to create a, preferably annular, cleaning gap between the adjustment component (44) and the holding component (28); and a helical spring (48) which elastically supports the locking component (46) on a, preferably circumferential, collar portion (50) on the first magnetic ring (18) for assuming the locking position and preferably coaxially surrounds the first magnetic ring (18).

6. Closing head (10) according to one of the preceding claims, wherein: the locking component (46) has at least one cleaning opening (64) through which the adjusting component (44), the holding component (28) and / or a preferably annular cleaning gap between the adjusting component (44) and the holding component (28) is accessible from the outside for supplying cleaning fluid; and / or the adjusting component (44) has at least one cleaning opening (62) through which the holding component (28) and / or a preferably annular cleaning gap between the adjusting component (44) and the holding component (28) is accessible from the outside for supplying cleaning fluid.

7. Closing head (10) according to one of the preceding claims, wherein at least one of the following is fulfilled: magnets of the first magnetic ring (18) are encapsulated; magnets of the second magnetic ring (20) are encapsulated; a sleeve-shaped metal sheet (22), preferably stainless steel sheet, covers magnets of the first magnetic ring (18) on an inner peripheral side of the magnets; and a sleeve-shaped metal sheet (24), preferably stainless steel sheet, covers magnets of the second magnetic ring (20) on an outer peripheral side of the magnets.

8. Capping head (10) according to one of the preceding claims, wherein: the first magnetic ring (18) is adjustable by the adjusting device (26) to increase an overlap with the second magnetic ring (20) to increase the maximum closing torque in a direction downwards and / or towards a closing element (14) of the closing head (10).

9. Closing head (10) according to one of the preceding claims, wherein: the connecting component (36) is mounted axially movable in the adjusting component (44); and / or the connecting component (36) is movable in a radial direction with respect to a longitudinal center axis (L) of the closing head (10) from the holding position for adjusting the adjusting component (44) and the first magnetic ring (18) to the holding component (28), preferably pressed out from the holding component (28), when the locking component (46) does not block the connecting component (36) in the holding position.

10. Closing head (10) according to one of the preceding claims, wherein: the locking component (46) is movable parallel to or rotatably about a longitudinal central axis (L) of the closing head (10) between the locking position and an unlocking position in which the connecting component (36) is released to leave the holding position.

11. Closing head (10) according to one of the preceding claims, wherein: the adjusting component (44) is rotatable about the holding component (28), preferably helically, in the unlocking position of the locking component (46), wherein upon rotation of the adjusting component (44), the connecting component (36) is pressed out of the holding position by the holding component (28) against its elastic prestress.

12. Closing head (10) according to one of the preceding claims, wherein: an outer peripheral surface of the holding component (28) has a preferably helical groove track (30) into which the connecting component (36) engages; and optionally, a groove base of the groove track (30) along a longitudinal extent of the groove track (30) has a plurality of recesses (32) arranged one behind the other in a row, preferably rounded, for engagement by the connecting component (36) in the holding position.

13. Closing head (10) according to one of the preceding claims, wherein at least one of the following is fulfilled: the locking component (46), the adjusting component (44) and / or the holding component (28) are arranged coaxially to one another; the locking component (46), the adjusting component (44) and / or the holding component (28) is sleeve-shaped; and the connecting component (36) is pin-shaped.

14. Capping head (10) according to one of the preceding claims, further comprising at least one of: a drive element (12), preferably a drive shaft, which is drivingly connected to the holding component (28); a rotary bearing (34) which rotatably connects the holding component (28) and the second magnetic ring (20); and a closing element (14), preferably a closing cone, which is carried on the second magnetic ring (20).

15. A method for adjusting a magnetic coupling (16) of a closing head (10) according to one of the preceding claims, wherein the method comprises: manually moving the locking component (46) against its elastic prestress from the locking position into an unlocking position to release the mobility of the connecting component (36) and thus the rotatability of the adjusting component (44); manually, preferably helically, rotating the adjusting component (44) around the holding component (28) to adjust the first magnetic ring (18) relative to the second magnetic ring (20) to a desired adjusting position, wherein: - upon manual rotation of the adjusting component (44), the released connecting component (36) is pressed out of the holding position by the holding component (28) against its elastic prestress; and - the released connecting component (36) moves back into the holding position in the desired adjusting position under the elastic prestress;and moving the locking member (46) back into the locking position so that the connecting member (36) is again locked in the holding position;

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