DE1586262A1 - Method and device for wrapping objects - Google Patents

Description

Matter; 72

SAPAL aoci ^ te anonyme des plieases automatiq.ues CH-1024 Ecublens (TD, Switzerland) '

Method and device for wrapping objects

The present invention "relates to a method of wrapping articles such as" for example Chocolate bars, starting with the "wrapping" by moving one object after the other with its associated packaging material through a folding shaft leads.

It has been around for a long time in packaging machines, for example for wrapping chocolate bars common to provide a so-called folding shaft through

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which the item to be packaged with its associated Packing material is pushed to achieve a partial fold.

The folding shaft has the great advantage that the packaging machine both in terms of construction and Operation is simple and causes a fold which is very appealing and to which buyers have long been used are.

However, the output of packaging machines with folding shafts was limited until now by the fact that one in known machines, all of the folding processes that take place after the folding shaft are carried out in the area of the folding shaft.

A wrapping machine with a stationary folding shaft is already known, in which the upper ram after the entire stroke has been completed, it swivels out of the path it travels through and then runs back outside this path. The upper plunger releases the latter prematurely and thus improves the passage of time accordingly.

A machine is also known in which a movably arranged folding hood is attached to the object to be wrapped including material blanks runs in the opposite direction and thereby approximated them on all sides around the longitudinal and transverse edges of the object turns at right angles, after which the folding hood and object retract in the opposite direction.

The aim of the present invention is to determine the permissible output rate of a packaging machine with a folding chute to increase significantly without, however, reducing the

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Working speed or the acceleration of each Machine parts is increased. According to the invention, this goal is achieved by only part of the FaItvorgange in the area of the folding shaft and carries out the following folding processes outside of the area mentioned in order to to release this quickly and to increase the permissible output of the machine without reducing the working speed or the acceleration of the individual machine parts is increased.

Since, according to the invention, the area mentioned is now free earlier than in the case of known machines, one can It is advisable to proceed in such a way that the folding processes are continued while the partially folded around the object Packaging material is still partially in the folding shaft, the folding continues while the item is being removed leads into a final folding station, and already during this transfer the following work cycle begins by one the following object with its associated Introduces packaging material into the folding shaft.

The invention also relates to a device for carrying out said method, with a folding shaft through which the objects with the associated packaging material pass one after the other, and with means arranged outside the region of the folding shaft in order to fold the packaging material to continue the objects and to finish them «

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This device is characterized according to the invention by means which move the partially packaged object away from the area of the folding shaft to a Lead end folder to quickly release this area and to increase the permissible output of the machine without reducing the working speed or acceleration of the individual machine parts is increased.

The device is expediently designed in such a way that those arranged outside the area of the splitting shaft Means have folding members, which are at the same time designed as transport members and set up in such a way, that, on the one hand, they begin the folding processes on the object leaving the folding shaft, while the partially folded object Some of the packaging material is still in the folding shaft, and on the other hand, continue the folding process, while they are transferring the partially wrapped item towards the end-folding station, during which Transfer already a new folding work cycle begins with the following item.

An example of an embodiment of the invention is shown below with reference to the accompanying drawing described in more detail and the advantage over known machines briefly explained. Show it

Fig. 1 - 3 in side view and partially in section three successive operating phases of a packaging machine, parts that are not essential to the invention are omitted;

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Fiß. 4-6, partly in section, three consecutive Operational phaaen of the Querfalterj

Piss. 7 shows a view from above of the machine according to FIG Figures 1-6;

Piss. 8a (for comparison) a simplified movement sequence diagram a well-known machine with a folding shaft, Pig. 8b shows a corresponding scheme for that in Pi «. 1-7 shown Machine.

The machine shown has a conveyor chain 1 which runs around a wheel 2 and has carriers 2a. These convey chocolate bars 3a, 3b, 3c ... on a (not shown) base against a fold, which is described in more detail below.

From a roll (not shown), at least one film 4 is cut in sections in a known manner delivered against the fold. Furthermore, from a storage container 5 paper blanks 50 are placed on the film sections brought into the fold, which is also done in a manner known per se by means of pliers 6.

The folding point is initially equipped with a folding shaft 7, which is supported by a driver 8 and ab is movable. A lower ram 9 and an upper ram 10 act in the folding shaft 7. The shaft 11 of the The lower Stöaaels 9 slides in a guide 12 and is actuated by a lever 13. The upper plunger 10 is operated by the links 14, 15 and 16, of which the latter is firmly hinged at point 17. Purely

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pivoting movement of the plunger 10, the handlebars 14 and 16 operated in parallel to each other. The upper plunger 10 is provided with a damper 18 in a known manner.

Subsequent to the folding shaft 7 is the one shown Machine equipped with a transfer member 19 which is arranged pivotably on the axis 20 and at the same time acts as a transverse folding organ. For this purpose, the organ 19 is provided with transverse folds, which essentially are formed by two opposing blocks 21.

Each block al is with a lower longitudinal folder 2? and provided with a rod 23 on which a Coil spring 24 is seated. This extends into a bore 25 of the block 21 and bumps there against a wall 26, while its other end acts against the pliers heads 27.

Along the pivoting path of the transfer organ 19 a guide 28 in the form of a circular arc sector is provided. At the end of the guide 28 is the end fold 29► This is with a movable lengthwise folder 30, a pivotable stop 31 and a slide 32 and a guide 33 are provided. The tours 28 and 33 are designed in such a way that the guide 28 has a short, radially downwardly projecting extension 34 and the guide 33 has a] somewhat longer extension 35 projecting radially upwards, the extensions 34 and 35 are practically parallel to each other and form a longitudinal guide.

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The "movable longitudinal folder 30 and the slide 32 and the stop 31 are pivotable about the axis 36 Handlebars operated, with guides and rods not explained in detail (known per se) being provided.

After the end fold 29 with its longitudinal guide 34, 35 is a stacker that can be pivoted about the axis 20 arranged, which acts along a fixed lateral guide. Finally, this stacker 37 is followed by two short distance horizontally acting draw hooks 39 and 40, which are actuated by levers 41 and 42, which are attached to the axle 43 are hinged.

The machine shown in Lie works as follows:

The chocolate bars 3 are conveyed against the lower ram 9 by the drivers 2a. By means of a Not shown slide, the panels 3 are pushed onto the head of the lower ram 9. At the same time will the board 3 at this point on its upper side with a section of the tape 4 and with a paper blank 50 provided, which is done by the pliers 6. To simplify the drawing, the one on panel 3 is used Section of the tape 4 not particularly distinguished from the paper blank 50.

The upper plunger is also in this position shown in FIG. 1 (see reference line I in FIG. 8b) retracted with its holder 10 into the folding shaft 7, so that the chocolate bar 3b with the packaging materials between the lower ram 9 and the damper 18

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of the upper holder 10 ″ can be retained.

In the in pie. 2 (see reference line II in Pi «. 8b) illustrated operating phase, the tongs 6 has released the packaging material 50 and the panel 3b is together with the packaging material passed through the folding shaft 7 by the rams 9 and 10. This is operated so that he travels a certain distance through the driver 8 in the same direction, but at a lower speed, how the panel 3b is guided, which has the advantage that the relative speed between the folding shaft 7 and Table 3 is reduced. In this way, damage to the packaging material as well as to the board with the same Output can be avoided.

The operating phase shown in FIG. 3 (see reference line III in FIG. 8b) is located Table 3b at the upper end of the path of the folding shaft 7. After the transfer member 19 with its cross folders has become effective, the folding shaft 7 has moved towards its lower position. But before the transfer body 19 can take effect, the holder 10 of the upper plunger must be pivoted to the right (Fig. 3) what happens with the help of the handlebars 14 »15 and 16.

You Fig. 4 shows an operating phase, which completely is briefly (see reference line IV in Fig. 8b) before that of Fig. 3. The panel 3b is still through the lower The plunger 9 and the damper 18 of the upper plunger 10 are held, while the blocks? 1 of the transfer device 19

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have already started their movement. First of all, the pliers heads 27 resiliently hold the panel 3b, and at the same time the transverse folder 22 approach the edge of the board. Then act this cross folder 22 by being under the Push the board and place the two side tabs of the packaging material on the bottom surface of the board.

FIG. 5 shows an operating phase of the organ 19 on the way (see reference line III in Hg. 8b) to the final fold 29. The lower transverse folders 22 are still on their way to the end position under the panel 3 · The pliers heads 27, which is already in the phase according to Pig. 4 were effective, are still applied to panel 3

In the operating phase shown in FIG. 6 (see reference line V in FIG. 8b) the table 3b of FIG. 1 is now moved to the place of the panel 3a shown there. In this position, the blocks 21 of the organ 19 are with all its components completely pulled to the side. The longitudinal folder 30 has the right of the two longitudinal flaps of the packaging material placed on the bottom surface of panel 3b

The panel 3a thus rests on the longitudinal folder 30, is guided by the extension 35 and held by the pivotable stop 31.

For the following operating phases, Figures 2 and 3 must again be considered.

As can also be seen in FIG. 2, it takes place in the end fold 29 the folding of the left longitudinal lobe through the Slider 32, which the panel 3a on a longitudinal folding plane

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pushes, which is formed by the extensions 34 and the pallet of the stacker 37. You can see that this longitudinal folding plane is arranged inclined at an angle of about 45 °. The fully packaged panel 3a is now partially in place on the pallet of the pivoting stacker 37.

From Fig. 3 it can be seen how the stacker lifts the board 3a on an arched sector between the two Pull hook 39 and 40 pushes. These then gradually pull the packaged bars along a short distance to the left.

All moving parts of the device shown are operated and controlled in a known manner. It is also noted that the application of adhesive is not shown and takes place in a known manner.

It can be seen that the transfer member 19 moves over an arc of about 45 °, which also applies to the Stacker 37 applies. It has been shown that for the path of the organ 19, an angle between 30 and and for that of the stacker 37, accordingly, 60 to 30 ° can be selected.

With reference to FIGS. 8a and 8b, the progress that can be achieved according to the invention will now be briefly illustrated, for example to be explained

In Fig. 8a, the horizontal sections show the timing for the working strokes of the following machine elements a known machine: lower ram UST, cross folder QF, longitudinal folder LF, longitudinal folder ram

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Forklift ST.

In Fi «. 8b are the corresponding working strokes of the machine according to FIGS. 1-7 "at the same speed as shown in FIG. 8a. You can see that the lower Pusher UST 9, the cross folder QF 22, the longitudinal folder LF 30, the longitudinal folder ram IFS 32 and the stacker ST 37 need the same period of time for their work strokes as which is the case in the known machine.

Fig. 8a shows schematically and more clearly Form represents the sequence of movements of the folding processes of a known machine. You can see that the individual movements follow each other with only slight overlaps and thereby need the time period o-a to carry out the entire folding cycle.

Fig. 8b shows schematically the corresponding sequence of movements of the folding processes of an invention Machine. It can be seen that the individual movements, thanks to the local separation of their associated organs, partially take place at the same time, so that the entire folding cycle is already carried out in the shortened time segment o-b. The time gain achieved in this way and illustrated in the form of a folding cycle is denoted by G in this figure and corresponds to as can be seen, about $ 30 of the entire period o-a in Fig. 8a

The achievable progress results from the logical conclusion, according to which the exhaust performance the inventive machine compared to a

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known machine is correspondingly higher, but the operating speed or acceleration of their individual Fold organs do not need to be raised. Expressed as a numerical example, the above conclusion gives the following Comparative values:

at the same working speed V

or acceleration A is the maximum permissible output

a) a known machine: N outputs

b) of the machine according to the invention: 1.3 N outputs.

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Claims (11)

PATENT CLAIMS 1. method of wrapping objects, such as chocolate bars, where you start wrapping by placing an object after the others with its associated packaging material leads through a folding shaft, characterized in that one only part of the folding processes in the area of the folding shaft and the following folding operations outside of the aforementioned Area in order to quickly release this area and increase the output of the machine without that the working speed or acceleration of the individual machine parts is increased. 2. Method according to claim. 1, characterized in that that the folding operations continue while the packaging material is partially folded around the object is still partially in the folding shaft that the folding can be continued while the object is in a final fold is transferred, and that the following work cycle is already started during this transport, by inserting the following item with its associated packaging material into the folding shaft. 3. The method according to claim 1 or 2, characterized in that the exit of the object out of the folding shaft and the continuation of the object 009826 / 003Ö away from the folding shaft without a sharp change of direction 4. The method according to claim 1 or 2, characterized in that one ^{moves the Fa ":} ^ ehi-cht in the same direction as the through the shaft iiiii-ir.i- ^ hlaufenden object, but at a slower speed than that of the Subject. 5. Device for performing the method according to claims 1-4, with a folding shaft by which the objects with the associated packaging material pass through one after the other and with outside means arranged in the region of the folding shaft in order to fold the packaging material around the objects to continue around and to lead to the end, characterized by means, which the partially packed item away from the area of the FaItSchachtes to an end fold lead to quickly release this area and increase the output of the machine without the Working speed or acceleration of each Machine parts is increased. 6. Apparatus according to claim 5, characterized in that the outside of the area of the folding shaft arranged means have folding members, which at the same time designed as transfer members and set up in such a way are that, on the one hand, they start the folding processes on the object leaving the folding shaft, while the partially folded packaging material is still partially in the folding shaft, and on the other hand Ήβ FaIt- 009826/0036 continue operations while transferring the partially packaged item against the end fold, while during this transfer already begins a new folding cycle with the following item. 7. Apparatus according to claim 5 or 6, characterized in that the Öasss at the same time as transfer organs trained folding members are operated so that they move the object away from the axis of the fold shaft in a Move direction which is the holder of an upper ram opposite, which cooperates with a lower ram, to move the item through the folding shaft 8. The device according to claim 7, characterized in that the holder of the upper plunger is hanging in such a way is hinged that it is actuated in the transverse direction and aligns itself over the folding shaft on its real axis before it reaches its lower position during its run through the folding shaft 9 · Device according to claim 7 »characterized in that that the folding members designed as transfer members are arranged to be pivotable about an axis, about the To transfer the object during the further folding on a circular path, the length of which is preferably between 30 and 60 °. 10 · Device according to claim 7, characterized in that the designed as transfer organs Folding members have two transverse folders which are movably arranged and actuated in such a way that they are in the Ueberabβstellung above the folding shaft in their outer BATH ORIGINAL 0Q9826 / 0036 End position "are the partially packed item grasp and two opposite cross folders, which down over the bottom surface of the object also protrude, apply to the bottom surface in order to lead the object held positively to the end fold. 11. The device according to claim 5 or 6, characterized in that the end fold with a movable Longitudinal folder is provided, which is effective immediately after the arrival of an object in this place. IP. Device according to claims 5-11, characterized in that the end folding station further includes a pivotable stacker is provided, which the object coming from the slide takes over directly and on a circular path, the angular path preferably between 60 and 30 °, pushes between two draw hooks that act horizontally over a short distance. 009826 / n03fi Blank page