EP0144009B1 - Packaging machine with a stock holder for rolls - Google Patents

Description

The invention relates to a packaging machine, in particular for cigarettes, in which blanks from packaging material (tinfoil) are separated from a material web wound into a bobbin, several bobbins being provided in a storage holder and being able to be conveyed one after the other into a consumption position.

High-performance packaging machines, especially for the production of cigarette packs, consume a lot of packaging material. Insofar as blanks in the area of the packaging machine are produced from a continuous web of the packaging material by severing, it is necessary to provide this packaging material wound into bobbins to a sufficient extent. Changing the bobbins in the area of the consumption position is time-consuming and tedious.

In a known packaging machine (where 81/01946), a number of bobbins lying axially one behind the other are kept ready in a storage holder. The respective front bobbin can be conveyed to a consumption position in which the web of packaging material of the bobbin can be pulled off.

With this known device, a certain number of bobbins can be kept ready and called up as required. However, the capacity of this supply holder is only sufficient for a limited working period.

The invention has for its object to provide a packaging machine with a particularly high bobbin capacity.

According to the invention the object is achieved by the characterizing features of claim 1.

The arrangement of six bobbin holders is expediently parallel to one another and at equal angular distances from one another. Two side-by-side bobbin holders are each in the removal position. The support frame with the bobbin holders is moved in cycles when the two bobbin holders in the removal position are empty.

The trough-shaped bobbin holders of the bobbin turret are designed in such a way that a plurality of bobbins which are coaxially juxtaposed are gripped and held exclusively on the circumference. Due to the high capacity, the total number of bobbins of the bobbin turret can be chosen so that the need for a working shift is covered. The packaging machine is therefore only “loaded” once before the start of the shift.

According to a further proposal of the invention, the bobbin holders in the region of the removal position are assigned (two) bobbin conveyors, which are responsible for transferring the bobbins from the bobbin holders to a bobbin holder (consumption station). According to the invention, these bobbin conveyors are designed such that they each take over the entire contents of a bobbin holder and then feed the bobbins individually according to the consumption of the bobbin holder.

Further features of the invention relate to the design of the reel turret, the reel holder, the reel conveyor and the facilities in the area of the consumption station.

• Fig. 1 eine Verpackungsmaschine mit Bobinen-Magazin im schematischen Grundriß,
• Fig. 2 das Bobinen-Magazin gemäß Fig. 1 in vergrößertem Maßstab als Einzelheit,
• Fig. 3 das Bobinen-Magazin in Rückansicht, etwa im Maßstab der Fig. 2,
• Fig. 4 Einzelheiten eines Bobinen-Revolvers als Teil des Bobinen-Magazins in Rückansicht,
• Fig. 5 das Bobinen-Magazin in Verbindung mit Konturen der Verpackungsmaschine in Seitenansicht bzw. im Querschnitt,
• Fig. 6 eine Darstellung ähnlich Fig. 5 eines Ausschnitts des Bobinen-Magazins bei veränderter Relativstellung von Einzelteilen,
• Fig. 7 eine Darstellung entsprechend Fig. 6 bei nochmals veränderter Relativstellung von Vorrichtungsteilen,
• Fig. 8 einen Bobinen-Förderer als Teil des Bobinen-Magazins im Grundriß, bei vergrößertem Maßstab,
• Fig. 9 eine Einzelheit einer Bobinen-Aufnahme im axialen Längsschnitt,
• Fig. 10 in schematischer Darstellung eine Einrichtung zum Verbinden der Enden zweier Material-Bahnen in Seitenansicht.

An embodiment of the invention is explained below with reference to the drawings. It shows :

• 1 is a packaging machine with bobbin magazine in a schematic plan,
• 2 the bobbin magazine according to FIG. 1 on an enlarged scale as a detail,
• 3 the bobbin magazine in rear view, approximately on the scale of FIG. 2,
• 4 details of a bobbin revolver as part of the bobbin magazine in rear view,
• 5 the bobbin magazine in connection with contours of the packaging machine in side view or in cross section,
• 6 shows an illustration similar to FIG. 5 of a section of the bobbin magazine with a changed relative position of individual parts,
• 7 shows a representation corresponding to FIG. 6 with another change in the relative position of device parts,
• 8 shows a bobbin conveyor as part of the bobbin magazine in plan view, on an enlarged scale,
• 9 shows a detail of a bobbin receptacle in axial longitudinal section,
• Fig. 10 shows a schematic representation of a device for connecting the ends of two webs of material in side view.

In the drawings, a packaging machine 20 is shown as a preferred application example, which is used, for example, for the production of (hard box) cigarette packs. The packaging machine 20 shown in outline in FIG. 1 is equipped for this purpose with a conventional cigarette magazine 21, a folding turret 22 and other conventional organs. The cigarettes formed in groups are first encased in an inner wrap made of tin foil or the like. Blanks for this are produced in the area of the packaging machine 20, specifically by cutting them off a continuously fed web 23 of the packaging material. The web 23 in turn is drawn off from a bobbin 24, which is located in the area of a consumption station 25 for this purpose. The production of the blanks and the packaging process take place in a known manner.

A powerful bobbin magazine 26 is assigned to the packaging machine 20. This is arranged in the area between the cigarette magazine 21 and the folding turret 22, namely where the cigarettes are wrapped in the inside wrap.

The bobbin magazine 26 consists of a bobbin turret 27, the consumption station 25 with two bobbin receptacles 28 and 29 and two bobbin conveyors 30 and 31 which can be moved back and forth between these and the bobbin turret 27.

The bobbin turret 27 is provided with a plurality of bobbin holders 32, 33, 34. In the present exemplary embodiment, six such bobbin holders 32, 33, 34 are arranged on a common support frame 35. This is mounted with a pivot 36 on an axle 37. The bobbin holders 32, 33, 34 are arranged at equal angular distances from one another on the support frame 35, which is driven in a vertical plane to rotate about the horizontal journal 37. The arrangement is such that the two bobbin holders 33, 34 located at the top each assume a removal position. In this, bobbins 24 are removed from the bobbin holders 33 and 34 and transferred to the consumption station 25 as required. The bobbins 24 of these bobbin holders 33, 34 in the removal position lie essentially with their axes in a common horizontal plane.

The bobbin holders 32, 33, 34 are designed such that they grip and hold the bobbins 24 accommodated therein along an outer circumference that is greater than 180 °. This makes it possible to carry the bobbins 24 even with the bobbin holders 32 pointing downward. For this purpose, each bobbin holder 32, 33, 34 consists of an arc-shaped outer support shell 38. These extend over an outer circumference of the bobbins 24, which is considerably larger than 180 °. However, the bobbins 24 protrude with a part of their circumference from the support shells 38 on the outer circumference of the bobbin turret 27.

Support elements for the bobbins 24 are arranged within the support shells 38 at a circumferential distance from one another, in the present case three groups of support rollers 39, 40, 41. These are rotatably arranged on pins 42 in inwardly projecting bearing blocks 43 of the support shells 38. The bobbins 24 each lie on the support rollers 39, 40, 41 in the manner of a three-point bearing. The distance between the groups of the support rollers 39, 40, 41 in the circumferential direction is such that the bobbins 24 are adequately supported even with the bobbin holders 32 pointing downward.

As can be seen, for example, from FIG. 5, each carrier shell 38 is equipped in the axial longitudinal direction with a large number of support rollers 39, 40, 41 lying closely next to one another in the area of each group. The distance between these support rollers 39, 40, 41 is selected so that each bobbin 24 is carried within a bobbin holder 32, 33, 34 by two support rollers 39, 40, 41 per group. The support rollers 39, 40, 41 also allow the bobbins 24 to be displaced in the axial direction of the bobbin holders 32, 33, 34. Cavities 44 and 45 are formed between the groups of the support rollers 39, 40, 41, respectively.

As can be seen in particular from FIGS. 1 and 5, the bobbin magazine 26 is arranged on the packaging machine 20 in such a way that the bobbin turret 27 lies on the back of the packaging machine 20. The individual bobbin holders 32, 33, 34 can thus be loaded with bobbins 24 from the open back. The journal 37 is connected to the machine frame of the packaging machine 20. A gearwheel 46 arranged on the support frame 35 is cyclically driven by a pinion 47, namely by an angle corresponding to two bobbin holders 32, 33, 34.

The bobbins 24 located in the (upper) bobbin holders 33, 34 are transferred as required to the consumption station 25, namely to the bobbin holders 28 and 29 assigned to each bobbin holder 33, 34.

These essentially consist of a hub 48, 49 facing the bobbin holders 33, 34 with the free side. On each of these, a bobbin 24 receives receptacles for the continuous removal of the web 23. The two hubs 48 and 49 are on a traverse 50 arranged, which is connected via a support arm 51 to the machine frame.

In each case one of the bobbins 24 on the hubs 48 and 49 is in the working position in which the web 23 is pulled off. As soon as the relevant bobbin 24 is used up, one end of the running web 23 is connected to the beginning of the web 23 of the fresh bobbin 24. FIG. 10 shows schematically a manually operated web connector 52 which can be used in the present case. The running web 23 runs over a lower deflecting roller 53, which at the same time forms a pivot bearing 54 for a pivotable, manually operated pressure jaw 55. In the present case, the free web end 56 of the new web 23 to be connected is fixed on this, by suction air via suction bores 57. A second pressing jaw 58 can be pivoted equally about a pivot bearing 59 arranged parallel to the axis.

To connect the web end 56 to the end of the running web 23, the pressing jaw 58 is pivoted counterclockwise in the present illustration into the position shown in broken lines. The web 23, which is also held via suction bores 60, is taken along and cut off in the area of a stationary cutting knife 61 by a counter knife 62 arranged on the pressing jaw 58. The now formed end of the running web 23 is pressed by the further moving pressure jaw 58 against the ready web end 56 and connected by adhesive or the like. The web 23 adjoining the web end 56 is thus the running one. When the assigned bobbin 24 is used up, the process takes place in the opposite direction (FIG. 10).

In the illustrated embodiment, the entirety of the reels 24, the reel holders 33 and 34 in the area of the ver taken from consumption station 25. For this purpose, the bobbin conveyors 30, 31 are each assigned to the bobbin holders 33, 34 in the upper position. These remove all the bobbins 24 from the bobbin holders 33, 34 and each deliver one - front - bobbin 24 to the bobbin holder 28 and 29, respectively.

The bobbin conveyors 30, 31 consist of a trough 63 which is adapted to the outer contour of the bobbins 24. On the edges of the support troughs 63 which extend over a (lower) partial circumference of the bobbins 24, support ribs 64 and 65 are formed, on which the bobbins 24 rest in a form-fitting manner during the reception in the support troughs 63. The trays 63 are slidably mounted on (two) support rods 66,67. The support rods extend from the bobbin turret 27 to directly into the area of the bobbin receptacles 28 and 29, namely beyond the hubs 48, 49.

The carrying troughs 63 and the supporting rods 66, 67 are mounted in such a way that when the bobbins 24 are taken over from the bobbin holders 33, 34, the former can enter them nested, specifically into the cavity 44, 45. The relative position is such that that the support ribs 64, 65 lie in the plane of the peripheral surfaces of the reels 24, that is to say in the bearing plane predetermined by the support rollers 39, 40, 41. By grasping the group of bobbins 24 on the outside (in FIG. 1 above), the entire content of the bobbin holders 33, 34 can be conveyed off into the starting position by moving the trough 63.

For this purpose, the carrying recess 63 is formed on its underside with a rack 68 running in the longitudinal direction. A pinion 69, which is mounted in or on the machine frame and is driven in a suitable manner, engages with this. The hods 63 are formed with a lug 70 which is held by the supporting rods 66, 67 when the Tra ^g troughs 63 completely for acquisition of bobbins 24 in the bobbins _- are retracted holders 33, 34 (position shown in FIG. 6).

The trays 63 have pawl-shaped drivers 71, 72, 73. These are each assigned to a bobbin 24 in such a way that in the driving position a bobbin 24 is gripped on the rear side surface in the conveying direction. When the entire group of (three) bobbins 24 is moved out of a bobbin holder 33, 34, the driver 71 grips the outer bobbin 24 on its end face.

Each trough 63 is equipped with two groups of such drivers 71, 72, 73. These are pivotably mounted outside of a space occupied by the bobbins 24 within the support recesses 63 and are designed as two-armed levers (FIG. 8). A lever arm 74 is formed with a support surface 75 abutting the bobbin 24, while the other lever arm 76 is elastically supported by a (compression) spring 77. The lever arms 74, 76, which are arranged at an angle to one another, result in an angled position of the drivers 71, 72, 73. A barbing effect results from the mounting and elastic support. In a certain direction of movement of the troughs 63 relative to the bobbins 24, the drivers 71, 72, 73 are ineffective by pivoting (in FIG. 8 counterclockwise), while they perform a supporting or entraining function in the opposite relative movement.

When a trough 63 is moved into a reel holder 33, 34, the drivers 71, 72, 73 are first moved past the reels 24 until the outer or last driver 71 detects the outer reel 24. The other drivers 72, 73 are ineffective due to pivoting.

By means of the carrying recess 63, the group of bobbins 24 is now conveyed out of the relevant bobbin holder 33, 34 into a position according to FIG. 5 as a result of the return movement (from right to left in FIG. 6) - provided that the associated bobbin holder 28, 29 is empty. In this position, the front bobbin 24 in the direction of movement is pushed onto the associated hub 48, 49 by the conveying movement of the support recess 63. When this bobbin 24 is gripped and fixed on the hub 48, 49, the support recess 63 moves into a position back, which is shown for example in FIG. 2 with respect to the (upper) bobbin conveyor 30. In this position, the subsequent bobbins 24 in the trough 63 and these themselves have a sufficient distance from the bobbin receptacle 28 and 29, so that the web 23 can be pulled off the bobbin 24 which is now in the working position.

When the carrying tray 63 moves back from the loading position, as shown for example in FIG. 8, into the position of the bobbin conveyor 30 in FIG. 2, the (two) bobbins 24 remaining in the carrying tray 63 run against a stop 78 which can be moved from the side into the path of movement of the trough 63 or the bobbin 24. The bobbins 24 in the trough 63 are thereby held in place while the trough 63 itself is moved on. The relative displacement of the bobbins 24 within the trough 63 goes so far that the next following bobbin 24 assumes a lying position facing the bobbin holder 28, 29. At the same time, this leads to the fact that the next driver 72 rests on the facing side surface of the next, original middle bobbin 24: the trough 63 can now serve as a feeder for the next bobbin 24 when the one previously pushed onto the hub 48, 49 has been used up. The same process then takes place with respect to the third bobbin 24 within the carrying recess 63. FIG. 7 shows how this last bobbin 24 is pushed onto the hub 48, 49 by the carrying recess 63 under the action of the drivers 73. During the previous return movement, further stops 79 come into effect, which likewise move the reels 24 within the trough 63 effect.

The support recesses 63 are formed with a longitudinal groove 80, which enables entry into the reel holder 33, 34 by the entry of the support rollers 40 or the associated bearing block 43 into this longitudinal groove 80.

The bobbin receptacle 28, 29 or the hub 48, 49 is also designed in a special way. The bobbins 24 are usually provided with an inner, sleeve-shaped core 81, predominantly made of cardboard. This core 81 remains as a residue on the hub 48, 49 when the bobbin 24 is empty. The bobbins 24 are held over the core 81 on the hub 48, 49, in the present exemplary embodiment by means of essentially radially movable, hook-shaped clamping jaws 82. Several of these, in the present exemplary embodiment two, are arranged opposite one another. The clamping jaws 82 are designed as pivotable levers with hook-shaped ends. The majority of the clamping jaws 82 is mounted within the hollow hub 48, 49, namely in a pivot bearing 83. An actuating lever 84, which goes beyond this pivot bearing 83 and is connected to the respective clamping jaw 82, is connected to a common push rod 85. This emerges on the side opposite the bobbin 24 with a handle from the hub 48, 49. By pulling the push rod 85, the clamping jaws 82 are pivoted inwards in the present exemplary embodiment in such a way that the core 81 can be removed freely from the hub 48, 49. The pivoting movement takes place against the load of a (compression) spring 86, which in the present case is arranged as a spreading spring between the two diametrically opposite clamping jaws 82. These are thus pressed by the spring 86 into the clamping position (Fig. 9). Opposite to the clamping jaws 82 or their hook-shaped holding ends, in the present exemplary embodiment, a counter disc 87 is arranged, against which the bobbin 24 is pressed by the clamping jaws 82 while the web 23 is running. The hook-shaped ends of the clamping jaws 82 can be formed with sharpened edges in such a way that they press into the material of the core 81 (cardboard) in the working position (FIG. 9) and thus hold it positively and secure it against relative rotation.

Otherwise, the hub 48, 49 can be designed in a conventional manner.

Claims (20)

1. Packaging machine, especially for cigarettes, in which blanks consisting of packaging material (tin foil) are severed from a. sheet of material wound into a reel, and in which several reels are provided in a supply holder and can be conveyed in succession into a consumption position, « ... characterised by a reel magazine (26) comprising a reel turret (27) with a multiplicity of troughshaped reel holders (32, 33, 34) which are arranged, each for receiving several reels (24), on a supporting frame (35) rotating periodically about an axis of rotation (axle journal 37) directed horizontally.

2. Packaging machine according to Claim 1, characterized in that the reel holders (32, 33, 34) with a cross-section in the form of a circle or part circle surround and retain along a peripheral region of more than 180°, the reels (24) which are arranged equiaxially next to one another.

3. Packaging machine according to Claim 1 or 2, characterized in that the reels (24) are supported in the reel holders (32, 33, 34) on several, especially three supports, especially supporting rollers (39, 40, 41), offset more than 90° relative to one another.

4. Packaging machine according to Claim 3, characterized in that each reel holder (32, 33, 34) is provided with several supporting rollers (39, 40,

41), especially with at least two rows, extending in the longitudinal direction of the reel holders (32, 33, 34), of supporting rollers (39, 40, 41) arranged in close succession.

5. Packaging machine according to Claim 1 and one or more of the further claims, characterized in that each reel holder (32, 33, 34) comprises a supporting shell (38) with a cross-section in the form of a circle or part circle, in which the supporting rollers (39, 40, 41) are attached, the supporting shells (38) of the reel holders (32, 33, 34) being connected to one another to form the supporting frame (35) and being mounted on the (horizontal) axle journal (37).

6. Packaging machine according to Claim 1 and one or more of the further claims, characterized in that six reel holders (32, 33, 34) are arranged along an arc of a circle at equal angular distances from one another, and at any particular time two (upper) reel holders (33, 34) are provided in the same (horizontal) plane for the extraction of reels (24).

7. Packaging machine according to Claim 6, characterized in that the reels (24) can be pushed alternately out of the reel holders (33, 34) located in the consumption position onto one of two fixed hubs (48, 49) arranged approximately equiaxially relative to the reels (24) in the reel holders (33, 34) and belonging to two reel-receiving devices (28, 29).

8. Packaging machine according to Claim 7, characterized in that the reels (24) can each be conveyed from the particular reel holders (33, 34) to the particular reel-receiving devices (28, 29) by a reel conveyor (30, 31) movable to and fro.

9. Packaging machine according to Claim 8, characterized in that all the reels (24) of a particular reel holder (33, 34) can be received at the same time by the reel conveyor (30, 31) and can be fed in succession by the latter to the reel-receiving device (28, 29) or the hubs (48, 49).

. 10. Packaging machine according to Claim 8 or 9, characterized in that the reel conveyor (30, 31) has a supporting trough (63) with longitudinally directed supporting members (supporting ribs 64, 65) for the periphery of the reels (24), approximately in the supporting plane of the supporting rollers (39, 40, 41) of the reel holders (32, 33, 34).

11. Packaging machine according to Claim 10, characterized the reel conveyor (30, 31) or its supporting trough (63) with the supporting ribs (64, 65) can be introduced into a cavity (44, 45) of the associated reel holder (32, 33, 34), in such a way that the supporting ribs (64, 65) extend approximately in the plane of the periphery of the reels (24) in the region of the reel holders (32, 33, 34), and wherein, during a return movement of the reel conveyor (30, 31) or of the supporting trough (63), the reels (24) resting on the supporting ribs (64, 65), can be conveyed out of the reel holder (32, 33, 34) and, whilst maintaining an unchanged relative position, are supported on the supporting trough (63) of the reel conveyor (30, 31).

12. Packaging machine according to Claim 8 and one or more of the further claims, characterized in that the reel conveyor (30, 31) or its supporting trough (63) has engagement means (71, 72, 73) grasping the reels (24) on their rear side face.

13. Packaging machine according to Claim 12, characterized in that the engagement means (71, 72, 73) are designed as movable (pivotable) pawls which are movable from a retracted or swung- away position outside the region of the reels (24) into an engagement position.

14. Packaging machine according to Claim 13, characterized in that the engagement means (71, 72, 73) are designed as two-armed levers, one lever arm (74) of which is designed to grasp the rear side face of a reel (24) by means of a supporting surface (75) and the other lever arm (76) of which is supported on a spring (77) and is loaded into the engagement position.

15. Packaging machine according to Claim 12 and one or more of the further claims, characterized in that each reel conveyor (30, 31) or its supporting trough (63) is equipped with a number of engagement means (71, 72, 73) corresponding to the number of reels (24) to be received the said engagement means being preferably in groups within an appropriate number per group, for grasping the reels (24) in succession on their rear side face so as to push them onto the hub (48, 49) of the reel-receiving device (28 or 29).

16. Packaging machine according to Claim 8 and one or more of the further claims, characterized in that the reels (24) are relatively displaceable, on the reel conveyor (30, 31) or the supporting trough (63) of the latter, in the direction of the reel-receiving device (28, 29), especially as a result of a return movement of the reel conveyor (30, 31), with the reels (24) at the same time being retained (by movable stops 78, 79), and the particular reel (24) located at the front in the direction of movement can be pushed onto the . hub (48, 49) by the reel conveyor (30, 31).

17. Packaging machine according to Claim 8 and one or more of the further claims, characterized in that the reel conveyor (30, 31) or its supporting trough (63) is movable to and fro by means of a reversible drive motor via a pinion (69) and a rack (68) arranged on the underside of the supporting trough (63), and the supporting trough (63) is supported displaceably on fixed guides (supporting rods 66, 67).

18. Packaging machine according to Claim 7 and one or more of the further claims, characterized in that a sheet connector (52) for connecting the ends of sheets (23) from one reel-receiving device (28, 29) and the other is assigned to the two reel-receiving devices (28, 29) connected to one another by means of a cross piece (50).

19. Packaging machine according to Claim 7 and one or more of the further claims, characterized in that, on the hubs (48, 49) of the reel-receiving devices (28, 29), clamping jaws (82), each movable radially inwards against elastic pressure, are assigned to the reels (24) on the hubs (48, 49) or to a core (81) of these, and the clamping jaws (82) are movable radially inwards against the pressure of a spring (86) to remove the core (81), especially by means of a (manually actuable) connecting rod (85).

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