EP3031738A1 - Device for performing a stroke movement for container treatment in a container treatment assembly - Google Patents

Abstract

The invention relates to a device (10) for carrying out a lifting movement for container treatment in a container treatment plant, comprising a lifting roller (30) and a lifting cam (20), which has two opposite cam tracks (22, 23) for guiding the lifting roller (30), wherein the lifting roller (30) in each case on one of the two cam tracks (22, 23) rolls, wherein the lifting roller (30) in at least a portion of the lifting cam (20) against one of the cam tracks (22, 23) is magnetically biased.

Description

Technical area

The present invention relates to a device for carrying out a lifting movement for container treatment in a container treatment plant, comprising a lifting roller and a lifting cam, which has two opposite cam tracks for guiding the lifting roller, wherein the lifting roller rolls on one of the two cam tracks.

State of the art

During container treatment, the container comes into contact with various treatment members, such as a filling valve or capping head. To contact the filling member or to be released from this, the container undergoes strokes. For a continuous and continuous operation, which is made possible for example by rotary filler or rotary locker, guide devices comprising a lifting cam and a lifting roller, are used, which allow the lifting movements of the container relative to the respective treatment organs.

The lifting curve usually comprises two opposing guideways, between which the lifting roller is arranged. Between the lifting roller and the two guideways a game is provided so that the lifting roller between the two guideways can oscillate back and forth. The lifting roller is connected via a lifting linkage with a container holder for receiving the container. During operation, the lifting roller rolls off on one of the two guideways. If the lift roller experiences a change in load direction due to a force acting on the container holder, for example an abrupt loading of a container from a treatment member, the roller releases contact with the one guide track and bounces against the opposite guide track.

The change of the guideway has a change of direction of the lifting roller result. Depending on the number of changes of direction of the load of the container holder in the stroke direction, it can thus lead to several guideway changes and the associated direction changes of the lifting roller.

A disadvantage of such devices is the high wear of the guideways of the lifting cam and the lifting roller, which is due to the impact load and direction change of the components, which is associated with a guideway change of the lifting roller.

Presentation of the invention

Starting from the known prior art, it is an object of the present invention to provide an improved device for carrying out a lifting movement for container treatment in a container treatment plant, which is characterized by a lower wear of the individual components, in particular the lifting curve.

This object is achieved by means of a device having the features of claim 1. Advantageous embodiments emerge from the subclaims.

Accordingly, a device for carrying out a lifting movement for container treatment in a container treatment plant is provided, which comprises a lifting roller and a lifting cam, which has two opposite cam tracks for guiding the lifting roller, wherein the lifting roller rolls on one of the two cam tracks. According to the invention, the lifting roller is magnetically biased against one of the cam tracks in at least one section of the lifting cam.

Due to the magnetic bias can be ensured that the lifting roller always rolls at least in the magnetic bias on the same curved path. Acting on the lifting roller forces that are less than or equal to the force with which the lifting roller is magnetically biased against the cam tracks and counteract this force, it is not able to separate the lifting roller of the cam track against which the lifting roller is biased. Since the contact between the lifting roller and a curved path during normal operation of the device is not solved, learns a curved path and no shock loads, which for example, would result from a release of the lifting roller of the curved path and a subsequent snap back of the lifting roller against the curved path.

In addition, the magnetic bias of the lift roller against one of the cam tracks also prevents the lift roller from being pushed against the opposite cam track. Rather, the opposite curved path is not contacted in normal operation of the device of the lifting roller, so that no wear occurs on the opposite curved path. Rather, the opposite curved path serves only as an emergency lane, which ensures that when exceeding the maximum force with which the lifting roller is magnetically biased against a curved path, the lifting roller is held in the lift curve and then performs a forced movement.

Since the magnetic bias of the lifting roller against one of the curved paths allows the lifting roller to roll only on this one curved path during normal operation of the device, only one running direction of the lifting roller results for the lifting roller during a treatment process at least in the region of the magnetic pretension. A direction change, which can be caused for example by a change of the curved path with which the lifting roller is in contact, can thus be prevented. The wear of the lift roller and the lift curve can be reduced by suppressing a direction change. At the same time, the drive energy required to drive the respective rotary device is also reduced due to the reduced friction.

By only partially providing the magnetic bias, the force by means of which the lifting roller is biased against one of the cam tracks can be provided selectively along the sections of the lift curve, in which it is also needed. Such a portion may be limited to a portion of the treatment angle of a rotary filling machine in which a treatment step such as closing, filling or rinsing a container takes place. By partially eliminating the bias, the lifting roller and the lift curve can be additionally protected and the energy consumption can be reduced accordingly.

In a further preferred embodiment, the magnetic bias is provided by a magnet unit comprising a magnet, preferably a permanent magnet or an electromagnet.

The magnet unit allows a non-contact bias of the lifting roller against one of the cam tracks. This makes it possible that the lifting roller can roll on the one cam track and at the same time is biased against this.

If the magnet of the magnet unit is a permanent magnet, it is possible to permanently maintain a magnetic field for providing the magnetic bias, without the need for a power supply.

If the magnet of the magnet unit is an electromagnet, the magnetic field that provides the biasing force can be turned on and off. As a result, it is possible to provide or refrain from magnetic preload on sections of the cam track on which the lifting roller rolls, depending on the load of the device to be expected in the respective section of the cam track. By omitting the provision of the biasing force, with which the lifting roller is biased against one of the cam tracks, the wear of the lifting roller or the cam track can be further reduced.

In addition, by means of an electromagnet, the height of the magnetic biasing force can be varied. Thus, it is possible to match the magnetic biasing force of a container to the appropriate treatment organ.

In a preferred embodiment, the magnet unit is arranged on the lifting roller, preferably on the front side on a non-rotatable mounting of the lifting roller. As a result, the magnet unit moves with the lifting roller, so that the lifting roller is magnetically biased at each position on one of the cam tracks.

By the magnet unit is arranged frontally on a non-rotatable mounting of the lifting roller, the magnet unit follows the translational movement of the device, in particular the translational movement of the lifting roller, relative to the lifting cam.

In a preferred embodiment, the magnet unit is directed only to one of the two curved paths. As a result, the lifting roller is magnetically biased against the curved path, to which the magnet unit is directed. There is no contact between the other, opposite cam track and the lifting roller. The other, opposite curved path rather serves as an emergency lane, by means of which the lifting roller can be held in the lift curve, should a act unforeseen high load on the device, which exceeds the magnetic biasing force.

Due to the fact that the magnet unit is directed onto one of the two cam tracks, an attraction force of a magnetic field emanating from the magnet unit acts on this cam track. Since the magnet unit is directed only to one of the two curved paths, it is ensured that the lifting roller rolls on only one of the two curved paths. According to the lifting roller does not jump back and forth between the two cam tracks during operation of the container treatment plant, so that the wear of the lifting roller and the lift curve can be kept low.

Alternatively, the magnet unit may have a polarity by means of which it repels the cam track to which it is directed. Characterized the lifting roller is magnetically biased against the curved path, which is opposite to the curved path on which the magnet unit is directed.

In a further embodiment, the lifting curve comprises ferromagnetic material, preferably iron, nickel or cobalt, for interacting with the magnet unit.

Thereby, the part of one of the cam tracks, which is exposed to a magnetic field of the magnet unit, spontaneously magnetized. In this case, the magnetic field emanating from the magnetic unit influences the direction of the elementary magnets of the ferromagnetic material, whereby a magnetic attraction force is provided between the magnet unit and the ferromagnetic material of the lifting cam or one of the cam tracks.

Accordingly, it is not necessary to provide the lift curve or one of the cam tracks in the form of a permanent magnet or an electromagnet. On the one hand, the costs for the lifting curve can be kept low, on the other hand prevents loose objects made of ferromagnetic material, such as loose screws or metallic abrasion, adhere to the lift curve and pollution, increased friction or damage to the Lifting roller can lead.

The lift curve may also have only portions containing ferromagnetic material to partially bias the lift roller against the curved path. For example, the bias can only be applied in the areas in which the lifting roller is not through anyway a corresponding treatment member is pressed over the container holder against the curved path. This prevents that, after the elimination of the force exerted by the treatment member force on the lifting roller this dissolves from the curved path and abuts against the opposite curved path.

In a further preferred development, the magnet unit has a length for interacting with the lift curve, which is 1 mm to 500 mm, preferably 10 mm to 250 mm, and particularly preferably 50 mm to 100 mm.

Thereby, by means of the magnet unit, a magnetic field can be generated, which provides a sufficiently large biasing force for biasing the lifting roller against one of the curved paths. Furthermore, the dimensions allow the magnet unit to be guided by the lift curve.

In another embodiment, the magnet unit does not contact the cam track against which the lift roller is biased, and is preferably 0.1 mm to 20 mm, preferably 0.25 mm to 10 mm, and particularly preferably 0.5 mm to 5 mm, spaced from the cam track.

This ensures that the magnetic field emanating from the magnetic unit, which acts on the curved path, is sufficiently large to provide the required magnetic biasing force with which the lifting roller is biased against the curved path. In addition, the distance between the magnet unit and the cam track allows the magnet unit to move relative to the cam track without touching the cam track.

In a further preferred embodiment, the magnet unit is arranged on the lifting cam, wherein a ferromagnetic guide for interacting with the magnet unit is provided on the lifting roller.

Thereby, the magnetic field, which provides the magnetic bias between the lift roller and one of the cam tracks, generated from the lift curve. At the lifting roller while a guide made of ferromagnetic material is arranged, which is attracted by the outgoing of the lift curve magnetic field. The ferromagnetic guide is arranged for example on the front side on a non-rotatable mounting of the lifting roller.

Accordingly, the magnet unit is stationary and may extend over a portion of the lift curve or the entire lift curve.

In a further preferred embodiment, the magnet unit is integrated in one of the curved paths or two curved paths. In this case, one or both of the cam tracks is formed by a permanent magnet or an electromagnet. For example, a curved path generates a magnetic field by means of which it attracts the ferromagnetic guide arranged on the lifting roller. Alternatively, a curved path can also generate a magnetic field, by means of which it repels the ferromagnetic guide arranged on the lifting roller, so that the lifting roller is pressed against the opposite curved path. In addition, a curved path can also generate a magnetic field repelling the guide of the lifting roller and the opposite guide track can generate a magnetic field attracting the guidance of the lifting roller.

This will ensure that the lift roller is always held in one of the cam tracks for unrolling. When forces are applied to the device during operation of the container treatment system, such as pressure exerted by a closure head, the lifting roller is held on the curved path and is not pushed against the opposite curved path. Thus, the wear of the lifting roller or the cam tracks, which results from impact forces, can be kept low or prevented.

In a further preferred development, the magnet unit forms in the lifting curve a magnetic path which runs parallel to the curved path on which the lifting roller rolls.

As a result, a targeted interaction between the magnet unit and the ferromagnetic guide of the lifting roller is possible. In this case, the lifting roller rolls on the curved path, wherein the ferromagnetic guide is guided over the magnetic track. The magnetic field emanating from the magnetic track thus acts primarily on the ferromagnetic guide of the lifting roller.

Since the magnetic path makes up only a small part of the lift curve, the magnet unit can be limited to a relatively small part of the lift curve. This has an advantageous effect on the manufacturing cost of the lift curve.

In another embodiment, the magnetic bias of the lift roller against one of the cam tracks over a complete treatment angle of the container treatment plant is provided. This can ensure that the lifting roller always rolls only on a curved path. Even unforeseen forces acting on the lifting roller or the container holder forces can thus be compensated by the magnetic bias. If, for example, in a section of the treatment angle, in which usually no forces act in the stroke direction on the lift roller or the container holder, yet a force acting in the stroke direction, this does not cause the lift roller is released from the curved path and pressed against the opposite curved path becomes.

Brief description of the figures

Figur 1

schematisch eine perspektivische Ansicht einer Vorrichtung zum Ausführen einer Hubbewegung,

Figur 2

schematisch eine Schnittansicht der Vorrichtung aus Figur 1,

Figur 3

schematisch eine Schnittansicht einer Vorrichtung, wobei eine Hubrolle gegen eine obere Kurvenbahn vorgespannt ist,

Figur 4

schematisch eine Schnittansicht einer Vorrichtung, wobei eine Magneteinheit an der Hubkurve angeordnet ist, und

Figur 5

schematisch eine Schnittansicht eine Vorrichtung, wobei an der Hubkurve zwei Magneteinheiten angeordnet sind.

Preferred further embodiments and aspects of the present invention are explained in more detail by the following description of the figures. Showing:

FIG. 1

schematically a perspective view of a device for performing a lifting movement,

FIG. 2

schematically a sectional view of the device FIG. 1 .

FIG. 3

1 is a schematic sectional view of a device with a lifting roller biased against an upper cam track;

FIG. 4

schematically a sectional view of a device, wherein a magnet unit is arranged on the lifting cam, and

FIG. 5

schematically a sectional view of a device, wherein two magnet units are arranged on the lifting cam.

Detailed description of preferred embodiments

In the following, preferred embodiments will be described with reference to the figures. In this case, identical, similar or equivalent elements are denoted by identical reference numerals. In order to avoid redundancy, a repeated description of these elements will be omitted in the following description.

FIGS. 1 and 2 show a device 10 for performing a lifting movement of a container holder in a container treatment plant. The container holder executes several strokes during operation, which are predetermined by the device 10. For this purpose, the container holder is connected via a lifting rod 12 with the device 10. The container holder may be, for example, a lifting plate or a neck-handling clamp, which moves a container towards a treatment organ or away from a treatment organ. Alternatively, and preferably, a treatment member is connected to the device 10 via a lift linkage 12 and is moved toward or away from a container (not shown).

The device 10 comprises a lifting cam 20, which has the shape of a lateral groove. The lift cam 20 is formed by a lower cam track 22 and an upper cam track 23, which is opposite to the lower cam track 22.

On the lower cam track 22, a lifting roller 30 is arranged, which can roll along the lower cam track 22. Between the lifting roller 30 and the upper cam track 23, a clearance is provided so that the lifting roller 30 does not contact the upper cam track 23. The lifting roller 30 is on a, in FIG. 2 stored storage 32, which is connected via the lifting linkage 12 with the container holder. Accordingly, the container holder can be moved by the rolling of the lifting roller 30 on the lower cam track 22 translationally. If the height of the lifting cam 20, in particular the height of the lower cam track 22, changes, the lifting linkage 12 and thus the container holder undergo a lifting movement.

At the storage 32 of the lifting roller 30, a magnet unit 40 is arranged, which biases the lifting roller 30 against the lower cam track 22. In this case, the magnet unit 40 comprises a plate 41, which is connected to the bearing 32, in particular welded. On the plate 41, two permanent magnets 42 are arranged, which lie opposite the lower cam track 22. The permanent magnets 42 have a different polarity in the direction perpendicular to the surface of the cam track 22. Together with the plate 41, which consists of iron and therefore acts as a yoke, the differently poled permanent magnets 42 generate a magnetic field, whereby an attractive force between the permanent magnet 42 and the lower cam track 22nd provided. Accordingly, the lift curve 20 is made of iron, so that it undergoes spontaneous magnetization in the region of the magnetic field emanating from the magnetic unit 40. Alternatively, the lift curve 20 may also include nickel, cobalt or other ferromagnetic materials. In addition, the magnet unit 40 may also be provided in the form of an electromagnet.

By the bias of the lifting roller 30 against the lower cam track 22 by means of the magnet unit 40 can be prevented that when the lifting linkage 12 emanating from the container holder, vertically upward force, the contact between the lifting roller 30 and the lower cam track 22 is separated becomes. This can be prevented in particular that the roller 30 abuts against the upper cam track 23. A back and forth movement of the roller 30 between the lower cam track 22 and the upper cam track 23, which leads to a high wear of the upper cam track, the lower cam track and the roller 30 can thus be successfully prevented.

FIG. 3 is the device 10 of the FIGS. 1 and 2 to be seen, with the difference that the lifting roller 30 is magnetically biased against the upper cam track 23. Accordingly, the lifting roller 30 rolls on the upper curved path 23. Game is provided between the lift roller 30 and the lower cam track 22 so that the lift roller 30 does not contact the lower cam track 22.

The magnets 42 of the magnet unit 40 are disposed opposite to the upper cam track 23 and spaced therefrom by a 3 mm gap. Alternatively, the distance between the magnets 42 and the upper cam track 23 may also have a different amount, which is between 0.1 mm to 20 mm. In this embodiment, the self-weight of the lift roller 30, the lift linkage 12 and a container holder is supported by the attraction force between the magnet unit 40 and the upper cam track 23. The lower cam track 22 serves as an emergency lane, which catches the lift roller 30 and on which the lift roller 30 can roll, in the event that the magnetic field of the magnet unit 40 is interrupted or a vertically downward force acting on the container holder, a maximum magnetic biasing force with which the lifting roller 30 is biased against the upper cam track 23 is exceeded.

In addition, after wear has occurred on the upper cam track 23, from the in FIG. 3 shown arrangement of the magnet unit 40 to the in the FIGS. 1 and 2 shown arrangement of the magnet unit 40 are changed. Accordingly, the lift curve 20 provides the life of the upper cam track 23 and the life of the lower cam track 22. Thus, an exchange of the curve 20 only after the wear of both cam tracks 22 and 23 is necessary.

In a further alternative, the magnet unit 40 can also generate a magnetic field which repels the upper curved path 23. In this case, the lifting roller 30, as in the FIGS. 1 and 2 shown biased against the lower guide track 22.

FIG. 4 a device 10 can be seen, in which a magnet 42 of a magnet unit 40 is arranged in the lifting cam 20. The lifting roller 30 is magnetically biased against the lower cam track 22.

In the FIG. 4 shown lower curved path 22 extends only over part of a side wall of the groove of the lifting cam 20. At the lower curved path 22 is adjacent to a magnetic path 44 at. The magnetic track 44 is provided by a magnet 42, which is integrated in the lifting cam 20. The magnet 42 is a permanent magnet. Alternatively, the magnet 42 may also be an electromagnet.

At the storage 32 of the lifting roller 30, a guide 34 is arranged in the form of a flange. The guide 34 extends over the magnetic track 44. The guide 34 is made of iron or ferritic steel, so that it experiences a spontaneous magnetization by the magnet 42. Alternatively, the guide 34 may also comprise a nickel-containing, cobalt-containing, or other ferromagnetic material. The distance between the guide 34 and the magnetic track 44 is 3 mm. Alternatively, the distance between the guide 34 and the magnetic track 44 may also have a different amount from a range between 0.1 mm to 20 mm.

Alternatively to the in FIG. 4 shown arrangement of the device 10, the magnetic path 44 also adjacent to the upper curved path 23. The guide is then located immediately below the upper magnetic track, so that the lift roller is biased against the upper cam track.

FIG. 5 is a device 10 can be seen in which the magnet unit is also arranged in the lifting cam 20. In particular, two magnets 42, 43 are arranged in the lifting cam 20, wherein a magnet 42, a lower magnetic path 44 provides, which is connected to the lower Curved track 22 adjacent and another magnet 43 provides an upper magnetic path 45 which is adjacent to the upper curved path 23. Accordingly, an opposite arrangement of the magnetic track 44 and the magnetic path 45 results. The two magnets 42, 43 have the same polarity in the vertical direction or in the stroke direction of the device 10.

Between the magnetic tracks 44, 45 extends a bearing 32 of the lifting roller 30. In this case, the bearing 32 is extended by the width of the magnetic tracks 44, 45 compared to the bearings shown in the preceding figures.

The bearing 32 is made of iron, so that it can be spontaneously magnetized by the outgoing of the magnets 42, 43 magnetic fields. Alternatively, the bearing 32 is formed of nickel-containing, cobalt-containing or another ferromagnetic material. The lower magnet 42 attracts the bearing 32, whereby the lifting roller 30 is biased against the lower cam track 22. The upper magnet 43 abuts the bearing 32 and thus also contributes to the bias of the lifting roller 30 against the lower cam track 22 at.

Alternatively, the lower magnet 42 may repel the bearing 32 and the upper magnet 43 may tighten the bearing 32 so that the lift roller is biased against the upper cam track 23 and rolls on it.

Overall, also by the in FIG. 5 shown arrangement of the device 10 can be prevented that the lifting roller 30 moves in operation between the lower cam track 22 and the upper cam track 23 back and forth.

Where applicable, all individual features illustrated in the individual embodiments may be combined and / or interchanged without departing from the scope of the invention.

Bezuaszeichenliste

10

contraption

12

lifting linkage

20

stroke curve

22

cam track

23

cam track

30

elevating roll

32

storage

34

guide

40

magnet unit

41

plate

42

magnet

43

magnet

44

maglev

Claims (11)

Device (10) for carrying out a lifting movement for container treatment in a container treatment plant, comprising a lifting roller (30) and a lifting cam (20) which has two opposite cam tracks (22, 23) for guiding the lifting roller (30), wherein the lifting roller (30) 30) in each case on one of the two cam tracks (22, 23) rolls,
characterized in that
the lifting roller (30) is magnetically biased in at least a portion of the lifting cam (20) against one of the cam tracks (22, 23). Device (10) according to claim 1, characterized in that the magnetic bias is provided by a magnet unit (40) comprising a magnet (42, 43), preferably a permanent magnet or an electromagnet. Device (10) according to claim 1 or 2, characterized in that the magnet unit (40) on the lifting roller (30), preferably on the front side on a non-rotatable mounting (32) of the lifting roller (30) is arranged. The apparatus (10) according to claim 3, characterized in that the magnet unit (40) on one of the two curved paths (22, 23) is directed. Device (10) according to claim 3 or 4, characterized in that the lifting cam (20) comprises ferromagnetic material, preferably iron, nickel or cobalt, for interacting with the magnet unit (40). Device (10) according to claim 3 or 5, characterized in that the magnet unit (40) has a length for interacting with the lifting cam (20), which is 1 mm to 500 mm, preferably 10 mm to 250 mm, and particularly preferably 50 mm to 100 mm. Device (10) according to claim 3 or 6, characterized in that the magnet unit (40) of the cam track (22, 23) against which the lifting roller (30) is biased by 0.1 mm to 20 mm, preferably 0.25 mm to 10 mm, and more preferably 0.5 mm to 5 mm spaced apart. Device (10) according to Claim 1 or 2, characterized in that the magnet unit (40) is arranged on the lifting cam (20), wherein a ferromagnetic guide (34) for interacting with the magnet unit (40) is provided on the lifting roller (30) is. Device (10) according to claim 8, characterized in that the magnet unit (40) in one of the cam tracks (22, 23) or both cam tracks (22, 23) is integrated. Device (10) according to claim 8 or 9, characterized in that the magnet unit (40) in the lifting cam (20) forms a magnetic track (44) which runs parallel to the cam track (22, 23) on which the lifting roller (30 ) rolls off. Device (10) according to one of the preceding claims, characterized in that the magnetic bias of the lifting roller (30) against one of the cam tracks (22, 23) over a complete treatment angle of the container treatment plant is provided.

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