DE2520153A1 - DEVICE FOR WRAPPING FRAGILE, RECTANGULAR OBJECTS, IN PARTICULAR CHOCOLATE BARS OR BARS - Google Patents

Description

Patent attorneys Dipl.- Ing. W. Scherrmann Dr.- Ing. R. Rüger

7300 Esslingen (Neckar), Fabrikstrasse 24, PO Box 348

Phone May 6, 1975

PA ^ K WiQP Stuttgart (0711) 356539

L Ά _> D rUSe 35 9619

Telex 07256610 smru

Telegrams patent protection Esslingenneckar

2520Ί53

SAPAL Societe Anonyme des Plieuses Automatizes, 44, Avenue de Tir Federal, 1024 Ecublens (Switzerland)

Device for wrapping fragile, rectangular objects, in particular chocolate bars or bars

The invention relates to an apparatus for wrapping fragile, rectangular objects, in particular Chocolate bars or bars in two packaging sleeves, with one individually surrounding the objects continuously fed in a row with a first packaging sleeve Wrapping station and a subsequent one Folding station in which the individually accepted, partially packaged objects are folded into envelopes or banderoles in an envelope blank a second packaging sleeve can be folded in.

It has been around for a long time in the packaging of chocolate bars It is customary to put the chocolate bars in two packaging sleeves, in usually wrap an aluminum foil and a paper sleeve called a label. These are in practice known single-stage wrapping machines, in which the aluminum foil and the wrapping paper together in Envelope folding are applied. Because with this type of packaging the chocolate comes into contact with paper and

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higher requirements for the protection of the wrapped If chocolate cannot be sufficient, two-stage wrapping machines are often used in practice which in a first stage the chocolate bars in aluminum foil wrapped and then the partially packed bars in a second stage in the envelope blank made of paper be folded in envelope fold. Wrapping in aluminum foil can be done in several ways Use of appropriately controlled folders happen, as for example in DT PS 1 486 O53 is explained for one embodiment. Learn chocolate bars in these machines when wrapping deflections in different movement directions, whereby together with the The movements of the folders reduce the working speed of these machines, which are now at a high level of development but is limited.

The invention is therefore based on the object of a device for wrapping fragile, rectangular Objects, in particular chocolate bars or bars to be created in two packaging sleeves, which, with a simple, clear structure, allow a very high working speed to be achieved without affecting the work result, i.e. the quality of the packaging obtained would be impaired.

To solve this problem, the device mentioned at the beginning is characterized according to the invention in that the Wrapping station of a tube packing device with a tube former through which the objects pass continuously with subsequent longitudinal seam closure and cross-cutting device for the one enveloping the objects Tube is formed, at the exit of which the objects during their in the same transport

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direction taking place continuous further movement aligning and equidistant transfer device adjoins the aligned objects each together with a hat blank in constant Cycle sequence continuously feeds into the folding station.

With the new device, the objects are in the same place without any deflection until they reach the folding station Transport direction moved continuously. This ensures that the objects do not have any during their transport movement are exposed to significant delays or accelerations, as they are always associated with diversions in the transport route are. This allows a high working speed to be achieved, while on the other hand it is ensured that the transfer of the into the first packaging sleeve, i.e. usually the aluminum foil wrapped items to the folding station for the envelope folding of the label exactly is carried out in accordance with the facts, so that the folding station can also work flawlessly at a high working speed.

The objects can be on their way from the hose packing device rotated to the folding station during its continuous further movement by 90 ° and then transversely to Transport direction lying at the same distance into the Folding station are fed. In the case of elongated objects, this gives simpler structural conditions for the Folding station.

For this purpose, the transfer device can move in the direction of transport of the objects have pliers which can be moved over a certain distance, through which the from the hose packing device Coming objects can be grasped individually in a predetermined rhythm and after going through the route on one

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Conveyor with the objects gripping the rear edge and aligning them if necessary are transferable. If the objects are to be rotated by 90 ° in the aforementioned manner, the Tongs can be rotatably mounted on a revolving transport chain about vertical axes, with them during the passage a rotation of 9O can be imparted to the determined distance. This rotation of the objects by 90 ° during the transport movement also allows the tubular casings to be transversely closed in a simple manner. to For this purpose, cross-locking devices can be used on both sides of the transport path of the objects aligned transversely to the transport direction be arranged through which the objects with the end parts of their tubular casing continuously are movable.

An envelope blank output device can advantageously be installed in front of the folding station be arranged by the on each object transported past by the conveyor During the transport movement, an envelope blank can be placed, wherein in the area between the envelope blank output Before the direction and the folding station moved synchronously with the objects and arranged to the side of these transport tongs run along, which grasp the individual objects and together with their envelope blank in the folding station feed in. The transport tongs can be rotatably mounted about horizontal axes, the individual Objects can then be fed into the folding station in an essentially upright position.

This is particularly important when the folding station is a folding bike rotating around a horizontal axis with a controlled gripper arranged on the circumference. The gripper movement is then expediently with the

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The movement of the transport tongs is synchronized in such a way that each of the objects with the envelope blank is attached to one Gripper transferring tongs during the transfer with the gripper a common, essentially the same Executes tangential movement. This ensures that the object with the envelope blank jerk-free and without damaging the device applied in the hose packing device The packaging sleeve is handed over to the folding bike in the correct position.

The continuously rotating folding bike can advantageously be assigned a wedge-shaped ramp on which the envelope blank of the object accepted in each case runs up with a marginal edge and can be advanced to an end stop is, wherein in the area of the end stop one on the protruding, pending with its edge on the end stop Envelope blank a glue application outgoing glue nozzle is arranged. This arrangement allows it while the continuous running of the folding bike a brief standstill of the envelope blank in the area of the to reach the edge that has accumulated on the end stop, so that the glue can be applied safely and properly can.

In order to ensure that the folding station works continuously at high speed, the Folding wheel can be arranged in a rotating discharge conveyor in the transport direction, while the folding wheel is on his Circumferentially arranged, assigned to the individual grippers and displaceable in the axial direction carries pliers in each of which a fully wrapped object can be pushed in, which is then pushed by the respective tongs onto the discharge conveyor belt is deliverable.

In the drawing, an embodiment of the subject matter of the invention is shown. Show it:

_ Ci mm

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25201 S3

Fig. 1 A device according to the invention in an overall view in a side view,

FIG. 2 shows the device according to FIG. 1 in plan view,

3 shows the tube packing device of the device according to FIG. 1 in a side view and in another Scale,

FIG. 4 shows the tube packing device according to FIG. 3 in a top view,

5 shows the transfer device of the device according to FIG. 1 in a side view and in another Scale,

6 shows the transfer device according to FIG. 5 in a top view,

7 shows the folding station of the device according to FIG. 1 in a side view and on a different scale,

8 shows the folding station according to FIG. 7 in a top view,

9 shows a detail of the folding station according to FIG. 7 in a side view and on a different scale,

10 shows the folding bike with the associated discharge conveyor the device according to FIG. 1 in a perspective, simplified representation with illustration only one pair of grippers and

11 - the folding bike according to FIG. 10 in different positions and in a perspective view

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The device shown in FIGS. 1 and 2 in its entirety is used for wrapping chocolate bars in two packaging sleeves, i.e. first in an aluminum foil and then in a paper sleeve, the so-called label. The device can be used in the same way, but also for wrapping other fragile, rectangular objects are used, for example waffles, chocolate bars and the same.

The chocolate bars 1 are from a first conveyor in a row one behind the other continuously fed in the direction of transport indicated by a Ppart 3. The first conveyor 2 has carriers 4, which each hold the rear edge of the individual chocolate bars 1 reach behind, so that the chocolate bars 1 are supplied at the same intervals and thus in a constant cycle sequence will.

The first conveyor 2 feeds the chocolate bars 1 in succession continuously a hose packing device 5, which in its basic structure, for example from DT-AS 1 107 144 is known. The hose packing device 5, the details of which are in particular from the 3 and 4 can be seen, has a so-called tube former 6, around the continuously one the first The metal foil 7 forming the packaging cover is drawn, which is carried out by a rotating around two axially parallel rollers 9, 10. endless belt 8 is supported during tube formation, in order to keep their stress low .. The chocolate bars 1 are by the driver 4 of the first conveyor placed at constant intervals on the metal foil 7, which in the further course of their movement through the tube former 6 with lateral rollers 11, 12, 14 to form a

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koladetafeln 1 enveloping tube is formed, whose Longitudinal seam 13 continuously by a longitudinal seam closing device 16 having, for example, two embossing rollers is tightly closed. The initially upright closed longitudinal seam 13 is in the Device 16 folded over by a folding member 17 and a folding roller 18 so that the chocolate bars 1 in the flat tube 7a (FIG. 3), which now essentially corresponds to its outline shape, is continuously fed by a second conveyor 19 are further promoted.

The second conveyor 19, which is in the form of a driven endless conveyor belt guided around corresponding rollers 20 is formed, conveys the tube 7a with the chocolate bars 1 contained therein through a transverse cutting device 21 through, the protruding pinch strips driven synchronously with the conveying movement of the hose 7a supporting nip rollers 22 and the following provided ^ also synchronous with the forward movement of the hose 7a includes working cross cutting knife 23. As can be seen in particular from FIG. 5, in the transverse cutting station 21 the tube 7a between two adjacent chocolate bars 1 initially through the nip rollers 22 flattened, whereupon the cross cutting knife 23 cut through the tube, so that each chocolate bar 1 in one Hose section of corresponding length is included, the is initially not yet closed at the end.

At the exit of the described tubular packing station 5 through which the chocolate bars continuously pass, closes one, the chocolate bars taking place during their continuous, in the same transport direction 3 Transfer device 24 taking up further movement. The takeover device 24 has an endless transport chain 26 which is guided over two chain wheels 25 and on which

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equally spaced tongs 27 sit, of which in Figs. 1, 2. and 5, 6 for better clarity because only a few are illustrated. The tongs 27 are over a certain distance, which is essentially corresponds to the length of the lower run of the transport chain, synchronously with the second in transport direction 3 Conveyor 19 movable. They are controlled in such a way that they, in particular from FIG. 5 can be seen, a Grasp chocolate bars 1 after the other on the second conveyor 19 after the cross cutting device 21, from lift off the second conveyor 19 and turn 90 °, whereupon the chocolate bars 1 on one in the transport direction also synchronized with the transport movement revolving third conveyor 28 are abandoned. The third conveyor is designed in the form of an endless conveyor belt guided over pulleys 29, which is arranged at fixed intervals Carries driver 30, each of which engages behind the rear edge of a chocolate bar placed by a pair of tongs 27 and align them if necessary. Since the transport chain 26 and the third conveyor 28 at the same speed run and overlap each other, the chocolate bars 1 from the tongs 27 are jerk-free on the third Conveyor 28 passed after no relative movement between the drivers during the transition process itself 30 and the pliers 27 is present.

The chocolate bars 1 rotated by 90 ° by the tongs 27 are attached to the end parts 7b (FIGS. 5, 6) of their Hose casing moved through transverse closing devices 31 arranged on both sides of the transport path, which in the can essentially each consist of a pair of bordering rollers and through which the tubular casings are sealed at the ends be locked. The end parts 7b are folded over by stationary folders.

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The chocolate bars 1, which are now completely surrounded by the closed tubular casing, are replaced by the third Conveyor 28, aligned transversely to transport direction 3, continuously in a constant cycle sequence into a folding station 32 (Fig.l, 7, 8) fed. This can then be followed by the transfer point from the tongs 27 to the third conveyor 28 - at 33 in Fig. 1 - a control of the packaging the chocolate bars 1 take place, as it is also possible, for example on the chocolate bars in this area to put on a picture or a cardboard pad.

In front of the actual folding station 32, an envelope blank-from would be arranged in front of device 34, which is a driven one Has output roller 35, which pulls out the respective lower envelope blank from a magazine 36 and is placed on the chocolate bar 1 passing by on the third conveyor 28 below. A little, about two rollers 37 guided endless support conveyor belt 38 supports the application of the envelope blank 39 on the respective chocolate bar 1 in the manner shown in FIG.

In the area between the envelope blank output device 34 and the folding station 32 are synchronized with the chocolate bars 1, i.e. with the third conveyor 28 traveling Transport tongs 40 are provided (Fig. 2.8) which are arranged to the side of the third conveyor 28 and on a driven transport chain 4 2 revolving around two axially parallel rollers 41. The transport tongs 40, of which only a few are shown in the figures for the sake of clarity, are each around horizontal Axles 42a rotatably mounted. The chocolate bars brought in by the third conveyor 28 become common

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with the envelope blank 39 lying thereon inserted between the jaws of the transport tongs 40, whereupon they close and hold the envelope blank 39 on the chocolate bar 1. In the further course of the transport movement, the transport tongs 40 rotate in the manner shown in FIG. 7 at 40a about their horizontal axis 42a, ^{which is} achieved by a corresponding cam control of the transport tongs 40. This rotation of the transport tongs 40 has the consequence that the chocolate bars 1 with their shell blank 39 are fed into the folding station 32 in an essentially upright position.

The folding station 32 contains a folding wheel 45 rotating around a horizontal axis 4 in the direction of arrow 44 (FIG. 7), which has controlled gripper 46 distributed around the circumference. The rotary movement of the respective standing at the point 40a Transport tongs 40 around the horizontal axis 42a is matched to the rotational movement of the folding wheel 45 in such a way that the Transport tongs 40 and the gripper 46 which takes over the chocolate bar 1 with the envelope blank 39 during the transfer is essentially the same linear tangential movement to ensure that there is no relative movement between the transport tongs during the transfer 40 and the corresponding gripper 46, by means of which the chocolate bar 40 that has just been transferred is damaged could be.

A wedge-shaped ramp 47 is arranged below the continuously rotating driven folding wheel 45, the task of which can be seen in particular from FIGS. 7 and 9. The ramp 47 is designed such that the Cover blank 39, the chocolate bar just taken over by the gripper designated 46a in FIG. 7 runs with a marginal edge on the ramp 47 in such a way that the envelope blank in the direction of rotation of the FaIt-

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Rades 45 seen, is arched forward, as shown in FIG. 9, where at 1,11 and III three different successive positions of the chocolate bar 1 held in the gripper 46a with the associated envelope blank 39 are illustrated. In the further course of the rotary movement of the folding bike 45 runs _; Starting from the position I according to FIG. 9, the envelope blank 39 with its edge lying on the ramp 47 on an end stop 48 arranged on the ramp. Since the folding wheel 45 continues to rotate, the envelope blank is bent approximately in a U-shape until it finally comes free of the end stop 48 after passing through position III. In the area of the end stop 48 there is a glue nozzle 49 which applies a swab of glue to the envelope blank 39 of the chocolate bars 1 moved past positions I - III, which is briefly held by the end stop 48 in the area of the leading edge. The assigned glue storage container with the corresponding glue pump are illustrated at 50 and 51, respectively.

The folding bike 45 folds in the course of its rotational movement in an angular range of approximately 120 °, as indicated in FIG. 7 at 5 2 is, the envelope blank 39 provided with an application of glue in the manner described in envelope folding or banderole. This is illustrated in detail in Figs. 10-13, which illustrate successive positions of the folding bike 45, wherein for better clarity in the Drawing only a gripper 46 is shown. Starting from the position of FIG. 10, the moment corresponds, in which the envelope blank 39 after the application of the glue dots designated by 55 in the already Described manner has come free from the end stop 48, the chocolate bar 1 is when the folding wheel continues to rotate 45 in the position of FIG. 11, initially with her

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Cover blank 39 moved through a folding box 56 in which the over the edge of the chocolate bar 1 protruding flaps of the envelope blank 39 are folded down. The folding box 56 sits on a folding box holder 57, which in turn is arranged in a stationary manner. After leaving the folding box 56 are in the off 11, the front folder 58 is introduced from both front sides under the chocolate bar 1, as can be seen in FIG the front flaps are folded in (Fig. 12). The forehead folder 58 each sit on guide rods 59, the telescopically nested parallel to the axis of rotation of the folding bike 45 in the folding bike body and through there cam mechanisms, not shown, are controlled. In the further course of the rotary movement, a longitudinal folder is used 60 (Fig. 13) of a longitudinal flap of the envelope blank 39 folded. The chocolate bar 1 has thus essentially arrived at the end of the winding area 52 (FIG. 7), i.e. it stands essentially vertically in the region of the highest point of the folding wheel 45. The chocolate bar is now pushed radially outward into pocket-like pliers, with the other, larger longitudinal flap of the The envelope blank 39 is folded inward and glued by the glue application 55. The pliers 61 sits on one parallel to the direction of rotation of the folding wheel 45 aligned mounting rod 6 2, which in turn end on a Radial arm 6 3 is attached. The radial arm 6 3 is axially movably supported in the folding bike body and by cam mechanisms controlled in such a way that after the chocolate bar 1 has been inserted in the manner described, the tongs 61; is moved to the right with respect to Fig. 13j so that the In the chocolate bar held in the tongs 61 in the dashed line at la in FIG. 13 to the side next to the actual folding bike lying position is transferred.

On the folding wheel 45 there is a pair of pliers 61 for each gripper 46

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available; for the sake of clarity, in FIGS. 10-13 only show the mounting rods 6 2 with the radial arms 6 3 for the others, which are not shown further Pliers 61 illustrated.

In the further course of the rotary movement, i.e. when crossing a further angular path of about 180 ° from the position 1a according to FIG. 13, the now fully wrapped chocolate bar is taken down by its tongs 61 until it is arranged above a side next to the third conveyor and next to the folding wheel 45, in the transport direction conveying discharge conveyor 64 comes to rest. In this Momentarily the tongs 61 are opened so that the chocolate bar 1 is transferred to the discharge conveyor 64, on which it is taken along by driver 65 in the transport direction.

The folding wheel 45 described with reference to FIGS. 10-13 can also be used by other continuously operating folding devices be replaced, which allow the envelope blank to be folded into envelope folds.

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Claims (1)

Claims Device for wrapping fragile, rectangular Objects, in particular chocolate bars or bars in two packaging sleeves, with one individually surrounding the objects continuously fed in a row with a first packaging sleeve Wrapping station and a subsequent folding station in which the individually accepted partially packed objects in envelope folds in an envelope blank of a second packaging envelope are foldable, characterized in that the wrapping station of one of the objects (1) continuously passed through a tube former (6) having a hose packing device (5) with a subsequent longitudinal seam-closing and cross-cutting device (16, 23) is formed for the tube (7a) enveloping the objects (1), at the outlet thereof one, the objects (1) during their continuous in the same transport direction (3) Transfer device that aligns further movement and brings it to the same distance (24) adjoins that each of the aligned objects (1) together with an envelope blank (39) in feeds continuously into the folding station (32) at a constant cycle rate. Device according to claim 1, characterized in that the objects (1) on their way from the Tube packing device (5) to the folding station (32) during its continuous further movement in each case rotated by 90 ° and then transversely to the transport direction (3) lying at equal intervals in the folding station (32) are fed in. - 16 609847/007 2 3. Apparatus according to claim 1 or 2, characterized in that the transfer device (24) in The transport direction (3) of the objects (1) has tongs (27) which can be moved over a certain distance, through which the hose packing device (5) Coming objects (1) can be grasped individually in a predetermined cycle and after the route has been traversed on a conveyor (28) with the objects reaching behind on the rear edge and this if necessary aligning drivers C 30) are transferable. 4. Apparatus according to claim 2 or 3, characterized in that the tongs (27) on a circumferential Transport chain (26) are rotatably mounted about vertical axes and they pass through the a certain distance can be given a 90 ° rotation in the same direction. 5. The device according to claim 2, characterized in that transverse closing devices (31) are arranged on both sides of the transport path of the objects (1) aligned transversely to the transport direction, through which the transverse objects (1) with the end parts (7b) of their tubular casing can be continuously moved . 6. The device according to claim 3, characterized in that in front of the folding station (32) an envelope blank-Aus would be arranged in front of direction (34) through which on each object (1) transported past by the conveyor (28) during the transport movement Envelope blank (39) can be placed and that in the area between the envelope blank output device (34) and the folding station (32) synchronous with the - 17 - 609847/0072 Objects (1) moved and laterally arranged by these transport tongs (40) run along, which the grab individual objects and put them together with their envelope blank (39) in the folding station (32) feed in. 7. Apparatus according to claim 6, characterized in that that the transport tongs (40) are rotatably mounted about horizontal axes (42a) and the individual objects (1) can be fed into the folding station (32) in an essentially upright position. 8. The device according to claim 7, characterized in that the folding station (32) one around a horizontal Axis rotating folding wheel (45) mi? - Contains controlled grippers (46) arranged on the circumference, whose Gripper movement is synchronized with the movement of the transport tongs (40) in such a way that each one Transport tongs (40) transferring the object (1) with envelope blank (39) to a gripper (46) during the transfer with the gripper executes a common, essentially the same linear tangential movement. 9. The device according to claim 8, characterized in that the continuously rotating folding wheel (45) a wedge-shaped ramp (47) is assigned, on which the envelope blank (39) of the object taken over (1) runs up with a marginal edge and can be advanced up to an end stop (48) and that in Areas of the end stop (48) one on the protruding, with its edge on the end stop (48) pending envelope blank (39) a glue application (55) applying glue nozzle (4 9) is arranged. - 18 - 609847/0072 _ TO _ 10. The device according to claim 8 _r, characterized in that laterally next to the folding wheel (45) a rotating in the transport direction discharge conveyor (64) is arranged and the folding wheel (45) distributed on its circumference, assigned to the individual grippers (46), in the axial direction carries displaceable tongs (61) into each of which a finished wrapped object (1) can be inserted, which can be delivered by the respective tong (61) onto the discharge conveyor belt (64). 609847/0 0 72