EP1013183A2 - Apparatus for wrapping a strip around rod-like articles - Google Patents

Abstract

The appliance for coiling leaves (6) round bar-shaped objects (4), especially incorporates a rolling duct (22) formed by the adjacent stringers of a first (18) and second (20) rolling belt. A feeder drum (12)delivers the objects directly to the rolling-duct and a conveyor (24) takes away the objects from the rolling duct. The feeder and conveyor each have a deflector, and have containers (16,26) for the objects.

Description

The invention relates to a device for wrapping papers around rod-shaped objects, especially around cigarette-filter-cigarette groups a rolling channel for rolling the objects with the leaves, the Roll channel from adjacent strands of a first and a second roll belt is formed with a feed device for feeding the objects to the Roll channel.

Such devices are known from the prior art. Mostly such devices for wrapping compound leaflets around the Butt joints of groups formed from cigarettes and filters or mouthpieces used. These devices are used to assemble filter cigarettes on so-called filter attachment machines. The real thing happens Rolling around the rod-shaped objects or the cigarette-filter-cigarette groups in a so-called roll channel. The roll of the objects to be rolled comes about because the opposite surfaces are rolling surfaces and counter-rolling surface of the rolling channel at different speeds move so that the object or pinched between the two surfaces the cigarette-filter-cigarette group lying between the two surfaces into one Rolling movement is offset.

Various types of rolling channels have become known. It can be fundamentally differentiate between rolling channels that form a rolling drum a rolling drum and use a roller block or a counter-roller belt as a counter-rolling surface; while another group of roll channels for two synchronous roll belts Has formation of the channel. Roll channels of the first group mentioned are, for example. disclosed in German patents 65 90 64, 96 03 47 and 37 02 91 5. The first document shows a device for combining cigarettes with Mouthpiece attachments, with the aid of a feed drum provided with troughs Cigarettes placed on a second feed drum provided with the leaflets and then the cigarettes, mouthpieces and leaflets Group between the second feed drum and its circumference adjacent roll tape is rolled around the cigarette mouthpiece group with the Roll over papers.

The second publication mentioned is a device for Attach mouthpieces and cigarettes to the cigarette-mouthpiece groups are conveyed on a feed drum provided with troughs, whereupon they then into a parallel to the circumference of the feed drum counter-running roller conveyor formed roll channel are directed, the counter-rotating conveyor belt also the papers for rewinding the supplied groups wearing.

The third of the cited documents shows a device for connecting rod-shaped tobacco articles and filter plugs, in which the cigarette-mouthpiece groups already lie on the leaflet on a feed drum, whereupon they then in one arranged adjacent to the circumference of the feed conveyor Rollroll formed roll channel arrive. Before they get into the roll channel, they are gripped by ridges arranged on drums, which under friction Detecting the groups of the direction of movement of the feed drum with follow low speed so that they roll into one by the Rollklotz and the feed drum formed roller channel are offset.

The list of publications made, the rolling channels of the first Show group is only an example - however, all such rolling channels show the serious disadvantage that they have at least one fixed rolling surface. However, such a fixed rolling surface exercises at the moment of entry rolling groups exert considerable force on these groups without backing away. It is particularly disadvantageous if, as in DE 37 02 915 Two fixed surfaces form the rolling channel. In such a case where the Rolling surfaces have no elasticity at all, it can therefore due to the Rigidity of the rolling surfaces leads to damage to the groups to be rolled. This is reinforced in the last-mentioned publication that Initiate the rolling of the cigarette filter cigarette groups by themselves with less Speed can be detected as webs moving the feed conveyor.

To avoid the above disadvantages, rolling channels are therefore the above second group mentioned. With these rolling tunnels Formation of the channel uses two roller tapes. Therefore, with such Roll channels both boundary surfaces of the channel at least in a certain Extent elastic, so that the load for those rolled in such channels Objects or cigarette-filter-cigarette groups are kept lower. On Such prior art has become known, for example, from GB-PS 1 046 489. As far as the applicant is aware, however, this is only one state of the art paper. This document shows a rolling channel, which is formed by adjacent strands of two bands arranged one above the other, the lower of the belts rotating at a lower speed than the upper. In this known device, the cigarette-filter-cigarette groups are in front a deflection for the upper conveyor belt on the lower conveyor belt by one Drum put down. The groups stored on the lower conveyor belt then run on the lower conveyor belt towards the deflection for the upper conveyor. The top The tape then guides the topping paper sheets intended for wrapping Groups from top to bottom. At the same time, the groups to be rolled are still from Drivers promoted, the slower than the top feeding the leaflets Roller conveyor, but run faster than the lower roller conveyor feeding the groups. The rolled-over groups are then exited by these carriers when they exit the rolling channel via a stationary guide adjoining the rolling channel in Recordings of a discharge drum spent.

A disadvantage of this device forming the closest prior art it is, however, that the leaflets with the at the beginning of the rolling channel rolling objects are brought into contact. Since with this known Document three different feeders are provided, namely the the leaflet feeding drum that the cigarette filter cigarette group feeding conveyor belt, and finally the one running parallel to the rolling channel Carriers, these three feeders must also be very precisely coordinated in order to roll the leaflet onto the one to be rolled right at the start of the rolling channel To set up a group. In addition, the large number of feeders alone disadvantageous. Finally, there is the additional burden on the cigarette filter cigarette groups disadvantageous by the driver, since it is the sensitive groups additionally subjected to forces.

The object of the present invention is therefore in a device of the beginning mentioned type to avoid the aforementioned disadvantages, and a device too create the easier, more reliable and without the objects to be rolled over strain a roll of the objects causes.

This object is achieved in a device of the type mentioned solved that the feed device is designed as a drum, which the Issues objects essentially directly to the roll channel.

The advantages of the invention are, in particular, that due to the invention Feed drum a smooth and exact transfer of the wrapped Objects to the roll channel is possible. Furthermore, it is particularly advantageous that the invention involves a significant simplification of such devices brings. Because it can due to the invention to the closest state of the Technology known carriers are dispensed with. So that is Overall, the device according to the invention is considerably more reliable than the closest one State of the art.

A particularly preferred embodiment of the invention is characterized by this from that the feed drum a first deflection for one of the conveyor belts having. In this embodiment, for example in the deflection one in the Feed drum can be formed groove in which the roller conveyor to be deflected runs, the rotary movement of the feed drum can simultaneously drive a the conveyor belts can be used. It is therefore one in this embodiment Particularly strong simplification of the prior art is possible because of the Double function of the feed drum an additional deflection roller or deflection disc can be saved for one of the conveyor belts.

A feed drum is particularly preferred in the device according to the invention, has the recordings for the objects to be rolled. It is it in turn is preferred if the feed drum is designed as a first web Has recordings, with channels opening into the webs that hold the Objects can be connected to a vacuum source. It is preferred when the first webs are transverse to the conveying direction of the feed drum. With the aid of such feed drums, the invention is particularly simple and implement reliably. In this embodiment, the ones to be wrapped Objects from the feed drum or the webs on the feed drum at the moment gripped by the conveyor belt rotating on the feed drum, in what moment the corresponding web on the other conveyor belt nearest circumferential point of the feed drum. It is preferred if the roller conveyor rotating on the feed drum runs faster, than the opposite conveyor belt. This ensures that at the moment the Transfer of the objects to be wrapped to the roll channel a forward roll the objects take place. This is particularly preferred if the Feed drum with the objects already attached to the papers Rolling channel passes. In this way, immediately at the beginning, i.e. directly at Handover of the items, for example the cigarette filter cigarette group pinned papers, the roll and thus the wrapping of the objects kick off. It is therefore a defined and exact starting position based on the invention of the roll.

Another preferred embodiment of the invention is characterized in that that a removal device for removing the objects from the rolling channel is provided. This discharge device is preferably a discharge drum educated. The discharge drum according to the invention preferably has the webs previously described in connection with the feed drum as Recordings for the wrapped objects.

It is particularly preferred if the discharge drum as a second deflection for the conveyor belt driven by the feed drum. This represents one further simplification of the device according to the invention. It is further preferred if the discharge drum and the second deflection relative to each other are rotatable about a common axis. In this way, from the Feed drum certain speed of the revolving on this Rollbandes the discharge drum in its peripheral speed regardless of the speed of the conveyor belt. This enables you to purchase the wrapped objects, in particular wrapped cigarette filter cigarette groups, a decrease from the roll channel at the transport speed of the Objects in the roll channel, or with a higher or a lower one Speed than the speed of transport of the objects in the Roll channel. The device according to the invention is therefore according to the invention possible relative movement between the second deflection and the discharge drum very much flexibly adaptable to different requirement profiles for filter attaching machines.

The exact transfer of the rolled objects from the rolling channel to the The discharge drum can again be used with the help of the webs mentioned above, which run transverse to the conveying direction of the objects in the rolling channel, improve. Because on the one hand, compared to the peripheral speed Removal drum increased speed of the rotating belt around this the wrapped object can be accelerated against a web so that it then by means of the channels opening into the webs and the connected ones Negative pressure source can be held precisely and defined on the webs; on the other hand, it is also possible that the wrapped objects at a compared to the higher peripheral speed around the conveyor belt revolving around the conveyor drum running discharge drum from the discharge drum or the corresponding web can be accelerated again when leaving the roll channel.

Another advantageous embodiment of the invention points to the feed drum second webs running in the circumferential direction, into the second channels open, which in turn for holding papers on the feed drum with a Vacuum source are connectable. With the help of such webs, the Hold papers defined on the feed drum.

Another preferred embodiment is characterized in that at least one of the conveyor belts is heated at least in the area of the roller channel. In such an embodiment, the adhesive bond that the Holds papers while wrapping on the object to be wrapped, through the Heat supply can be improved.

In a further preferred embodiment of the invention The device consists of the first deflection associated with the feed drum revolving roller conveyor made of several, at a mutual distance from each other arranged sub-bands. Because of this division of the conveyor belt, the Arranging the webs as a receptacle for the objects to be transported or arranging the channels connected to a vacuum source on the webs much easier to realize by along the transverse axis to the conveying direction Feed drum alternately webs or conveyor belts are provided.

Further preferred embodiments of the invention are in the subclaims specified.

Fig. 1 zeigt eine erfindungsgemäße Vorrichtung in einer Seitenansicht;

Fig. 2 zeigt einen Schnitt durch die Fig. 1 entlang der Linie A-A;

Fig. 3 zeigt einen Schnitt durch die Vorrichtung der Fig. 1 entlang der Linie B-B;

Fig. 4 zeigt ein Geschwindigkeits-Weg-Diagramm bei einer Vorrichtung gemäß Fig. 1;

Fig. 5 zeigt eine zweite Ausführungsform einer erfindungsgemäßen Vorrichtung;

Fig. 6 zeigt einen Schnitt durch die Ausführungsform der Fig. 5 entlang der Linie C-C;

Fig. 7 zeigt einen Schnitt durch die Ausführungsform der Fig. 5 entlang der Linie D-D; und

Fig. 8 zeigt ein Geschwindigkeits-Weg-Diagramm für eine Vorrichtung gemäß Fig. 5.

A preferred embodiment of the invention will now be described with reference to the accompanying drawings. Show it:

Fig. 1 shows a device according to the invention in a side view;

FIG. 2 shows a section through FIG. 1 along the line AA;

Fig. 3 shows a section through the device of Fig. 1 along the line BB;

FIG. 4 shows a speed-distance diagram in a device according to FIG. 1;

5 shows a second embodiment of a device according to the invention;

Fig. 6 shows a section through the embodiment of Fig. 5 along the line CC;

Fig. 7 shows a section through the embodiment of Fig. 5 along the line DD; and

FIG. 8 shows a speed-path diagram for a device according to FIG. 5.

1 shows a first embodiment of the device 1 according to the invention in a side view. The device 1 has a supply drum 2. The Supply drum 2 leads with the help of vacuum channels (not shown) the objects 4 to be wrapped with - from the supply drum 2 seen - 4 sheets attached to the outside of the objects to be wrapped 6 to. The objects 4 are cigarette-filter-cigarette groups 4. The cigarette filter cigarette groups 4 are from the supply drum 2 in this recesses 8 formed on the circumference, into which the not shown Negative pressure channels open out.

At the point designated by 10 in FIG. 1, the cigarette-filter-cigarette groups 4 passed to a feed drum 12. The feed drum 12 runs opposite to the direction of rotation 13 of the supply drum 2 Direction of rotation 14. The two drums 2 and 12 run in parallel arranged axes of rotation.

The feed drum 12 has a distance arranged on its circumference 15 Bridges 16. The webs 16 are on the circumference 15 at regular intervals arranged. The webs 16 run parallel to the axis of rotation of the feed drum 12. First channels (32, see FIG. 2) are provided on the webs, but not with one vacuum source shown are connected. With the help of these vacuum channels 32, the cigarette-filter-cigarette groups 4 can be held on the webs 16.

At point 10 is the radial distance between the supply drum 2 and the Feed drum 12 set such that the cigarette filter cigarette group 4, which is at this point 10, from the web 16, which is at this point just located, can be taken from the trough 8. By the first Vacuum channels 32 in the feed drum 12 become the cigarette-filter-cigarette groups 4 then on the feed drum 12 or on the webs 16 of the Feed drum 12 held.

To also remove the leaflets 6 attached to the cigarette-filter-cigarette groups 4 to hold the feed drum 12, further vacuum channels are in the Feed drum 12 is provided, which the leaves on the feed drum 12th hold.

The cigarette-filter-cigarette groups 4 to be wrapped are then up to that Bring point at which the section A-A is drawn in Fig. 1. Gets there the side of the cigarette-filter-cigarette group facing away from the feed drum 12 4 with a first rotating also on the feed drum 12 Rollband 18 in contact. The cigarette-filter-cigarette group also occurs at this point 4 simultaneously in contact with a second conveyor belt 20. The first Roll belt 18 runs at the peripheral speed 14 of the feed drum 12. Das second roller conveyor 20 runs at speed 19 of the first Roller conveyor 18 reduced speed 21. At the cut by the section A-A marked point of Fig. 1 thus begins a rolling channel 22. By the higher Speed 19 of the first roller conveyor 18 compared to speed 21 of the second roller conveyor 20, the cigarette-filter-cigarette groups 4 in the Roll channel 22 rolls with the leaflet 6.

The number of wraps of the cigarette filter cigarette groups 4 in the Roll channel 22 depends on the difference in speeds 19 and 21 respectively Roll tapes 18 and 20 off. By changing the speed 19 of the conveyor belt 18 can be the number of wraps of the cigarette filter cigarette groups 4 in the Roll channel 22 are changed.

The first roller belt 18 and the second roller belt 20 have in the area of the roller channel 22 unidirectional conveying directions.

At the end of the rolling channel 22, at the one marked in FIG. 1 by the section B-B Place, the cigarette-filter-cigarette groups 4 leave the rolling channel 22. At this point, the cigarette filter cigarette groups 4 of one Removal drum 24 taken over. The removal drum 24 also has webs 26 arranged on the circumference. The discharge drum 24 runs with a Circumferential speed 28 clockwise, aligned with the feed drum 12 um. The speed 28 of the discharge drum 24 is less than the conveyor speed 19 of the first roller conveyor 18. Thus, the Rolling channel 22 at the point B-B leaving cigarette filter cigarette groups 4 of the first roller conveyor 18 against the receptacles on the discharge drum 24 serving webs 26 pressed. There is therefore a precise and safe Transfer of the cigarette filter cigarette groups 4 from the roll channel 22 with the help of the first roller conveyor 18 to the webs 26 acting as receptacles on the Removal drum 24.

Vacuum channels 29 for holding the cigarette-filter-cigarette groups are also on the webs 26 4 provided on the discharge drum 24. Subsequently the wrapped cigarette-filter-cigarette groups 4 from the discharge drum 24 passed to a fourth drum 30 for further processing. The Handover takes place in the reverse sense of the handover between the Supply drum 2 and the feed drum 12.

Fig. 2 shows the section A-A in Fig. 1. At this point is the Cigarette-filter-cigarette group 4 (the filter is hatched with 4b) shown while using the cigarette parts of the cigarette filter cigarette group 4 4a and 4c) at the beginning of the rolling channel 22 clamped between the first roller conveyor 18 and the second roller conveyor 20. The first roller conveyor 18 is 2 divided into five sub-bands 18. Transversely to the conveying direction of the The feed drum 12 between the partial conveyor belts 18 are the vacuum channels 32 provided that hold the cigarette filter cigarette groups 4 on the webs 16.

Fig. 3 shows the section B-B of Fig. 1. This section shows one on the Conveyor drum 24 idler pulley 34. The coaxial with the conveyor drum 24 rotatably mounted as a second deflection for the first roller conveyor 18 serving pulley 34 is freely movable relative to the discharge drum 24. Accordingly, the peripheral speed 28 of the discharge drum 24 can be lower be selected as the conveyor speed 19 of the first conveyor belt 18. Es therefore comes to a further slowdown at point B-B in FIG Conveying speed of the cigarette filter cigarette group 4. This renewed Slowing down the conveying speed of the cigarette filter-cigarette groups 4 at point B-B is compensated for by the larger number of webs 26 the circumference of the discharge drum 24 compared to the number of webs 16 on the Feed drum 12. It therefore only occurs in the illustrated embodiment to reduce the absolute conveying speed while the number of pieces of the wrapped groups 4 transferred to the drum 30 per unit time remains constant. The decrease in the conveying speed of the cigarette-filter-cigarette groups 4 is shown symbolically in FIG. 4. The denote black bars indicate the absolute amount of the conveyor speed while on the with x marked axis the distance traveled by the cigarette-filter-cigarette groups 4 between the transfer point 10 and the point A-A (first black Bar), point A-A and point B-B (second black bar) and the Point B-B and transfer to drum 30 (bar shown on the far left) is shown.

5 shows a second embodiment of the device 1. At In this device, the same reference numerals designate the same parts. The difference 1, here the discharge drum 24 'runs with a Speed 38 µm, which is higher than the conveyor speed 19 of the first Conveyor belt 18. Furthermore, the wrapped groups 4 from the discharge drum 24 'or of their webs 26 seen from behind in the conveying direction seized and thus returned to its original conveying speed, i.e. the The peripheral speed of the feed drum 12 is accelerated. The course of the Speed is in accordance with the division according to FIG. 4 in FIG. 8 shown.

6 and 7 show the sections C-C and D-D in Fig. 5. Here, the Fig. 7, that the discharge drum 24 'has no free pulley on it.

Rather, according to FIG. 7, the embodiment according to FIG Fig. 5, the first conveyor belt in direct contact with the discharge drum 24 ', so that the speeds of the feed drum 12, the first roller belt 18 and the discharge drum 24 'in the embodiment of FIG. 5 are the same.

Claims (26)

Device for wrapping sheets (6) around rod-shaped objects (4), in particular around cigarette-filter-cigarette groups, with a rolling channel (22) for rolling over the objects (4) with the leaflets (6), the rolling channel (22) being formed by adjacent strands of a first (18) and a second roller belt (20), with a feed device for feeding the objects (4) to the rolling channel (22), characterized in that the feed device is designed as a feed drum (12) which delivers the objects (4) essentially directly to the rolling channel (22). Device according to claim 1,
characterized in that the feed drum (12) is assigned a first deflection for one of the roller belts (18, 20). Device according to claim 2,
characterized in that the feed drum (12) and the first deflection are rotatably mounted about a common axis. Device according to claim 3,
characterized in that the feed drum (12) is fixedly connected to the first deflection. Device according to claim 4,
characterized in that the feed drum (12) by means of the first deflection serves as a drive for the roller belt (18) rotating on the first deflection. Device according to one of the preceding claims,
characterized by a removal device (24, 24 ') for removing the objects (4) from the rolling channel (22). Apparatus according to claim 6,
characterized in that the discharge device (24, 24 ') is designed as a discharge drum (24, 24'). Device according to claim 7,
characterized in that the discharge drum (24, 24 ') is assigned a second deflection for one of the roller belts (18, 20). Device according to claim 8,
characterized in that the discharge drum (24, 24 ') and the second deflection are rotatably mounted about a common axis. Device according to claim 9,
characterized in that the discharge drum (24, 24 ') and the second deflection can be rotated relative to one another about the common axis. Apparatus according to claim 10,
characterized in that the peripheral speed (28) of the discharge drum (24) is lower than that of the conveyor belt (18) running on the second deflection. Apparatus according to claim 10,
characterized in that the peripheral speed (38) of the discharge drum (24 ') is equal to that of the conveyor belt (18) running on the second deflection. Device according to one of claims 6 to 12,
characterized in that the removal device (24, 24 ') takes over the objects (4) essentially directly from the rolling channel (22). Device according to one of claims 6 to 13 and one of the preceding claims,
characterized in that the feed drum (12) and the discharge device (24, 24 ') are assigned to the same roller belt (18). Device according to one of claims 6 to 14,
characterized in that the removal device (24, 24 ') has receptacles (26) for the objects (4). Device according to one of the preceding claims,
characterized in that the feed drum (12) has receptacles (16) for the objects (4). Device according to at least one of claims 15 or 16,
characterized in that the receptacles are designed as first webs (16, 26) into which channels open, which in turn can be connected to a vacuum source for holding the objects (4). Device according to claim 17,
characterized in that the first webs (16, 26) are arranged transversely to the conveying direction of the feed drum (12) / discharge device (24, 24 '). Device according to claims 11, 15, 16, 17 and according to one of the preceding claims,
characterized in that the discharge drum (24) has a smaller pitch of the first webs (26) on its circumference than the feed drum (12). Device according to claims 11, 15, 16, 17 and according to one of the preceding claims,
characterized in that the discharge drum (24 ') and the feed drum (12) each have the same spacing of the first webs (16, 26) on their circumferences. Device according to one of the preceding claims,
characterized in that the feed drum (12) feeds the objects (4) together with the leaflets (6). Device according to claim 21,
characterized in that the feed drum (12) has second webs running in the circumferential direction, into which second channels open, which in turn can be connected to a vacuum source for holding the leaflets (6). Device according to one of the preceding claims,
characterized in that the roller belts (18, 20) have smooth surfaces facing the roller channel (22). Device according to one of the preceding claims and according to claim 2,
characterized in that the roller belt (18) deflected by the first deflection runs faster than the other roller belt (20). Device according to one of the preceding claims,
characterized in that at least one of the roller belts (18, 20) is heated. Device according to claim 2 and one of the preceding claims,
characterized in that the roller belt (18) rotating on the first deflection consists of a plurality of sub-belts (18) arranged at a mutual distance from one another.

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