Method for operating a closing station and closing station

Abstract

A method of operating a closing station includes decoupling a first closing element from a working position of the closing station and moving it away from the working position, bringing a second closing element into the working position, and coupling it into the container transport path at the working position.

Claims

1. A method comprising operating a closing station that is provided in a filling plant for filling containers with a filling product, wherein said closing station comprises first and second closing elements located at a closing element position for closing containers and arranged in a container transport path downstream of a filling machine in a container transport direction, a carrier, a carriage, a joint, and a rail, wherein said carriage travels along said rail, wherein said joint joins said carrier to said carriage, wherein said carrier supports said closing elements, and wherein said carrier rotates about said joint relative to said carriage, wherein operating said closing station comprises electrically or electronically synchronizing one or more servo drives that drive said first and second closing elements with a servo motor that drives said filling machine, uncoupling said first closing element from a working position of said closing station by causing horizontal sideways motion of said first closing element, moving said first closing element away from said working position, bringing said second closing element into said working position, said working position having been vacated by said first closing element, and coupling said second closing element into said container transport path at said working position by laterally moving said second closing element.

2. The method of claim 1, further comprising, prior to having decoupled said first closing element, using said first closing element to close a first container with a first type of container seal, and, after having coupled said second closing element, using said second closing element to close a second container with said first type of seal.

3. The method of claim 1, further comprising driving said first and second closing elements with a common drive.

4. The method of claim 1, wherein decoupling comprises decoupling said first closing element from a base that is permanently located at said working position, wherein coupling comprises coupling said second closing element with said base, and wherein said base is shared by said first and second closing elements.

5. The method of claim 1, further comprising driving said first and second closing elements with corresponding first and second drives.

6. The method of claim 1, wherein moving said first closing element away from said working position comprises moving said first closing element toward a changeover position, said method further comprising, concurrently with moving said first closing element, moving said second closing element toward said changeover position.

7. The method of claim 6, further comprising, after having moved said first and second closing elements, causing said first and second closing elements to change places at an interim position of said closing station, wherein said closing elements move together between said working position and said interim position.

8. The method of claim 6, further comprising, after having moved said first closing element away from said working position and before bringing said second closing element into said working position, swiveling said first and closing elements about a vertical axis at an interim position of said closing station, wherein said closing elements move together between said working position and said interim position.

9. An apparatus comprising a closing station to close containers with seals after said containers have been filled by a filling machine, said closing station comprising a carrier, a carriage, a joint, a rail, and first and second closing elements, each of which is movable between a working position and a rest position, wherein said carriage travels along said rail, wherein said joint joins said carrier to said carriage, wherein said carrier supports said closing elements, and wherein said carrier rotates about said joint relative to said carriage, and wherein said first and second closing elements are driven by one or more servo motors synchronized with a servo motor that drives said filling machine, wherein uncoupling said first closing element from said working position comprises causing horizontal sideways motion thereof, and wherein coupling said second closing element into said working position comprises laterally moving said second closing element.

10. The apparatus of claim 9, wherein said first closing element is configured to close containers with a first type of seal, wherein said second closing element is configured to close containers with a second type of seal that differs from said first type, wherein, when said first closing element is in said working position, said closing station closes containers with said first type of seal, and wherein, when said second closing element is in said working position, said closing station closes containers with said second type of seal.

11. The apparatus of claim 9, wherein said closing station further comprises an interim position, wherein said first and second closing elements are configured to move together between said working position and said interim position, wherein said first and second closing elements are configured to move between said interim position and said rest position, and wherein, at said interim position, said first and second closing elements swap positions.

12. The apparatus of claim 9, wherein said first closing element is configured to engage in sideways movement during decoupling from said working position and coupling to said rest position, and wherein said second closing element is configured to engage in lateral movement during decoupling from said rest position and during coupling to said working position.

13. The apparatus of claim 9, further comprising an interim position between said rest position and said working position, wherein said first closing element is configured to move from said working position to said interim position concurrently with said second closing element moving from said rest position to said interim position, wherein said first and second closing elements are configured to exchange places while at said interim position, and wherein, after having exchanged places, said first closing element is configured to continue on to said rest position while said second closing element is configured to continue on to said working position.

14. The apparatus of claim 9, further comprising an interim position, wherein said first and second closing elements are configured to move together toward said interim position, to exchange places while at said interim position, and to be moved away from said interim position after having exchanged places wherein said-closing station comprises a carrier on which said first and second closing elements are mounted, and wherein said carrier is configured to be moved to said interim position and to be swiveled about an axis thereof while said carrier is in said interim position.

15. The apparatus of claim 9, further comprising a common drive, wherein said first and second closing elements share said common drive.

16. The apparatus of claim 9, further comprising a base unit at said working position, wherein said first closing element comprises a closing unit, said closing unit comprising a rotor, a container carrier and closing tools on said rotor, wherein, when said first closing element is at said working position, said closing unit cooperates with said base unit, and wherein said base unit cooperates with whichever closing element is at said working position.

17. The apparatus of claim 9, further comprising a filling plant, wherein said filling plant comprises said filling machine, wherein said closing station is arranged downstream of said filling machine along a container-transport direction, and wherein said filling machine comprises an annular rotor rotatably mounted on a stationary part that does not rotate with said annular rotor.

18. The apparatus of claim 9, wherein each of said closing elements has its own drive.

19. The apparatus of claim 9, wherein, as a result of said filling machine and said closing elements each comprising their own respective drives, there exists an absence of mechanical coupling for driving between said closing station and said filling machine.

20. The apparatus of claim 9, wherein said closing station further comprises a carrier, a joint, a support arm, and a bearing, wherein said carrier supports said closing elements, wherein said support arm rotates about said bearing, wherein said carrier rotates about said joint, and wherein said joint joins said support arm to said carrier.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) These and other features of the invention will be apparent from the following detailed description and the accompanying figures, in which:

(2) FIG. 1 shows a schematic plan view of a filling plant for filling containers with a product and for subsequently closing the filled containers;

(3) FIG. 2 shows four states for the filling plant shown in FIG. 1;

(4) FIGS. 3 and 4 show an alternative embodiment of a filling plant; and

(5) FIG. 5 shows an embodiment similar to that shown in FIG. 3.

DETAILED DESCRIPTION

(6) FIG. 1 shows a filling plant 1 used for the filling containers 2, usually with a liquid product, for example a drink, and for subsequently closing the openings of the resulting filled containers 2 with a container seal 3. In the particular embodiment shown herein, the containers 2 happen to be bottles. However, other kinds of containers can also be used.

(7) The filling plant 1 includes a rotary filling-machine 4 having a rotor 5 with filling positions 6 distributed at equal angular intervals around a periphery thereof. The rotor 5 rotates about a vertical machine axis MA in a rotation direction A.

(8) An external transporter conveys containers 2 that are to be filled to these filling positions 6 through a container inlet that comprises a first transport star 7. The filled containers 2 are conveyed across a second transport star 8 to a closing station 9 that closes containers 2 with container seals 3.

(9) The closing station 9 has first and second closing elements 9a, 9b. When the filling plant 1 is in its operating state, as depicted in FIG. 1, the second closing element 9b is in a parked or idle position outside the container transport path, and the first closing element 9a is inside the container transport path in a closing-element position 10.

(10) In the configuration shown, the first closing element 9a is the working closing element, and the second closing element 9b is the idle closing element. The first and second closing elements 9a, 9b are able to swap positions so that the second closing element 9b becomes the working closing element and the first closing element 9a becomes the idle closing element.

(11) Closed containers 3 from the first closing element 9a are conveyed onward to an external transporter through a container outlet of the closing station 9. This container outlet comprises a third transport star 11. The second transport star 8 also forms the container inlet of the closing station 9. The sole closing-element position 10 of the filling plant 1 is thus located between the second transport star 8 and the third transport star 11.

(12) The first closing element 9a seals filled containers 2 with a first type of container seal 3. Meanwhile, the second closing element 9b seals filled containers 2 with a second type of container seal 3. Therefore, by swapping the first and second closing element 9a, 9b as described above, it is possible to reconfigure the apparatus to seal containers 2 with different types of container seals 3. Moreover, only the closing element 9a, 9b that is currently in use will actually be present along the container transport path between the filling machine's container outlet, at the second transport star 8, and the filling plant's container outlet, at the third transport star 11.

(13) In some embodiments, the closing element 9a, 9b has a closing tool that cooperates with a base unit. The base unit includes the container holders on a rotor. This unit can be permanently disposed at the closing-element position 10. This means that when the first closing element 9a is swapped into position at the closing-element position 10, its closing tool will cooperate with the base unit, while when the second closing element 9b is swapped into position, its closing tool can cooperate with the same base unit.

(14) The filling machine 4, the rotor 5, the first, second, and third transport stars 7, 8, 11, as well whichever closing element 9a, 9b has been swapped into the closing-element position 10, and in particular a rotor 12 of that closing element 9a, 9b, are driven synchronously, and in particular pitch-synchronously, by appropriate drives. This guarantees smooth passage of the containers 2 from the container inlet to the filling positions 6, via the second transport star 8, to the closing element 9a, 9b at the closing-element position 10 and from the closing element 9a, 9b to the container outlet or to the third transport star 11 located at the container outlet.

(15) FIG. 2 shows the filling plant 1 in first through fourth operating states a-d as it changes over from sealing with a first type of seal 3 and sealing with a second type of seal 3.

(16) The filling plant 1 shown in FIG. 1 is configured to seal with a first seal type using the first closing element 9a. In FIG. 2, this corresponds to the first operating state a.

(17) Conversion of the filling plant 1 so that it seals with the second seal type begins with uncoupling the closing element 9a from the closing-element position 10 and initially moving it to the side into a neutral position. This is preferably carried out by a horizontal or essentially horizontal sideways motion. In this neutral position, the first closing element 9a is sufficiently far from the closing-element position 10 and the second and third transport stars 8, 11 to avoid interfering with their operation.

(18) In the illustrated embodiment, the movement involves moving the entire closing element array, including the first and second closing elements 9a, 9b, to the interim or changeover position to achieve a second operating state b.

(19) The next step is to swap the first and second closing elements 9a, 9b so that the second closing element 9b now assumes the position previously occupied by the first closing element 9a. This brings about a third operating state c.

(20) The second closing element 9b is now moved into the closing-element position 10 and coupled to this position or to the filling plant 1 to bring about the fourth operating state d. This coupling is such as to guarantee synchronous, and in particular pitch-synchronous, operation of the second closing element 9b with the other components of the filling plant 1. This guarantees closure of the filled containers 2 with seals 3 of the second type. Meanwhile, the first closing element 9a now occupies the parked or idle position previously occupied by the second closing element 9b before the first and second closing elements 9a, 9b were swapped.

(21) FIGS. 3 and 4 show an alternative filling plant 1a similar to that shown in FIG. 1. The alternative filling plant la includes a filling machine 4 having an annular rotor 5 rotatably mounted on a stationary part 4.1 that does not rotate with the rotor 5.

(22) The filling machine 1a includes a support arm 13 having a first end and a second end. A joint 15 provides a swiveling connection between a carrier 16 and the support arm's first end. This carrier 16 carries the closing element array. In the illustrated embodiments, the closing element array's first and second closing elements 9a, 9b are at opposite ends of the carrier 16 and equidistant from the joint 15.

(23) A bearing 14 holds the support arm 13 at its second end. As a result, the support arm 13 is able to swivel about an axis parallel to the machine axis MA and a closing element axis VA. This permits the support arm 13 to swivel so as to move the first and second closing elements 9a, 9b to an interim or changeover position. While at the interim position, swiveling the carrier 16 about the joint 15 swaps the positions of the first and second closing elements 9a, 9b.

(24) FIG. 5 shows a second alternative filling plant 1b similar to that shown in FIG. 4. In this filling plant 1b, the joint 15 connects the carrier 16 to a slide and rail system 17 and in particular, to a carriage 18 that is part of that rail system 17. The carriage 18 carries the carrier 16 along a rail 19 to an interim position where the positions of the first and second closing elements 9a, 9b can be swapped as described in connection with FIGS. 3 and 4.

(25) The embodiments described thus far have only two closing elements 9a, 9b in the closing station 9. However, there can be more than two closing elements, each of which closes containers with a different type of seal.

(26) It has also been assumed that before they can be swapped, the first and second closing elements 9a, 9b must first be moved to a neutral interim or changeover position in which the position of the first and second closing elements 9a, 9b can be changed by using the swiveling joint 15 to rotate a carrier 16 about its vertical axis. While this configuration does indeed allow swapping the first and second closing elements 9a, 9b within a compact space, configurations are also possible in which, when swapping the closing elements 9a, 9b, only the closing element 9a, 9b that is to be switched and uncoupled from the closing-element position 10 is moved to an interim position and the new closing element is then moved to the closing-element position 10. In such a case, it is preferable for the exchanged closing element to be moved into the idle position previously occupied by the closing element that has now been moved to closing-element position 10.

(27) It is preferable that at least the filling machine 4 and the first and second closing elements 9a, 9b not be mechanically coupled for driving but that they each comprise their own drive. Suitable drives are servo motors that are electronically controlled in such a way as to engage in synchronous, and in particular, in pitch-synchronous operation of the components of the filling plant 1, 1a and 1b. This can be achieved by electrical or electronic coupling between a drive of the filling machine 4 and a drive of whichever one of the first and second closing elements 9a, 9b happens to be located at the closing-element position 10. Such synchronous operation can also be achieved by controlling these drives with a central plant controller. The necessary synchronization between whichever closing element 9a, 9b has just been moved into the closing-element position 10 and the plant as a whole can be effected purely electronically in this simple way.

(28) In any event, upon a changeover from one type of container seal to another type of container seal, whichever closing element 9a, 9b is currently located at the closing-element position 10 uncouples out of that closing-element position 10 position and moves out of the transport path of the containers 2 into the interim or changeover position. Meanwhile, a new closing element 9b, 9a moves out of the rest position and into the closing-element position 10 so that the replaced closing element can now occupy the rest position previously occupied by closing element 9b, 9a that replaced it. The closing element 9a that is to be replaced and the closing element 9b that replaces it preferably switch their positions while still in the interim or changeover position, as has been described above.

(29) As described thus far, closing elements are only switched only for the purpose of providing a closing element that can close with a different type of seal. However, the purpose of carrying out the swapping procedure is not important. For example, there is no requirement that the closing elements all close with different types of seals. For example, the swapping procedure outlined herein is potentially useful if closing elements have to be changed over at short notice for servicing, preventive maintenance, or in case a closing element breaks down.

(30) Although the invention has been described in connection with rotary filling machines, nothing prevents the invention from being used along a transport path of a linear-type container treatment machine. After all, a linear path is merely the limit of a circular path as radius goes to infinity.