DE7422186U - Packaging machine for shrink film wrapping of piece goods - Google Patents

Description

•• «•••» 4 Aj

June 27, 1974 HS / E

Applicant: Earl Leibfried GmbH, 7035 Herrenberg, Schwarzwaldstrasse 63

Representative: Patent Attorneys Dr.-Ing. Rudolf Schiering and Dipl.-Ing. Hans Schiering, 703 Böblingen, Westerwaldweg 4

· "Π» νι

of general cargo

The invention "relates to a tarpack machine for shrink film wrapping of piece goods with a transport device for guiding the piece goods through, a roll-off device arranged over the transport path of the piece goods for an upper film supply roll, an unwinding device arranged under the transport path of the piece goods for a lower film supply roll and with a welding device for connecting the upper film and the lower film to a sheet of film that crosses the transport path of the piece goods and that is moved behind by means of the transport device The object pushed into the film web together with a renewed transverse weld a separation of the into the Foil web enveloped object allows.

Such a packaging machine is already through the German Offenlegungsschrift 1 929 690 known. She ends

mostly with a shrink tunnel, in which, in addition to the shrinking of the film material, a side closure of the shrink film band can also be carried out through the action of heat, so that hospitable work processes are combined over a particularly short distance. It is therefore particularly suitable both for creating a shipping-proof cohesion of several objects as well as for the weatherproof full wrapping of large-area objects such as z. B. furniture, doors, mattresses and insulating panels. In order to bring about a perfect side seal with extensive shrink film banderoles, taking advantage of the shrinkage tension occurring in the shrink tunnel, it is preferable to ensure that the lower film has only relatively narrow lateral protrusions and the lateral protrusions of the upper film extend almost as far as the extended Uaberfölie. With a hau fiiTSJÜ WSCll ⁰⁰ " ¹ Aot» Τ3ο / -> 1τη ·· η +: £!> ΝΓηο <5) 3 ·> ·) · ηο · <= »η P> T» cr "i Trfc si fih accordingly

regardless of the prevention of unnecessary waste of film material, the need to frequently exchange the shrink film supply rolls in the two unwinding devices for a shrink film supply roll of a different width.

By the German Offenlegungsschrift 1 931 430 is one Quick change device for exchanging shrink film supply rolls in a machine for shrink film wrapping known from general cargo, in which for each of the two shrink films between the bearing for the supply roll and an additional feed device leading to the transverse sealing device for the shrink film wrapping Cross welding device for connecting a new supply roll and apart from the bearing for the first supply roll an additional storage for the new supply roll is attached, which preferably consists of several in two par-

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7422186 18.1176

allelic rows arranged one behind the other and transversely to the

■ There are feed rollers that can be rotated in the longitudinal direction of the machine.

; This makes it possible to use the new supply roll during the

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j and the beginning of the new supply roll with the end of the

pulling the old supply roll through the feed device, so that longer downtimes of the packaging machine be avoided.

The object of the invention is zugrun.de, a packaging machine of the type mentioned to create a particularly fast replacement of the shrink film supply rolls allows for more frequent adjustment of the shrink film width to widely differing dimensions of the packaged goods.

This object is achieved according to the invention dergewtaio that the roll-off device for the supervisory paper roll and the unwinding device for the lower film supply roll one with an existing connection between the upper film and Form the lower film from the packaging glass chine laterally removable exchange unit.

On two or more exchange units of this type, upper and lower film combinations which differ from one another in terms of film width can be used be kept ready for different packaged goods dimensions, so that in a Change of the packaged goods, a separation of the film web, a threading of the shrink film ends into the majority of the

loose pulleys existing feed devices

Separate welding process for restoring the foil balm that crosses the transport route of the piece goods and a loss of shrink foil resulting therefrom is unnecessary. Apart from the complex of the exchange unit, it can often be used _; fig on the purchase of a second packaging machine

for shrinking cladding of piece goods can be dispensed with, which at the same time saves a considerable amount of space brings.

An exemplary embodiment of the invention which is particularly preferred due to advantageous configurations is shown in FIG Drawing shown and is described in more detail below. Show it

Fig. 1 is a perspective reproduction of a packaging machine according to the prior art and

Fig. 2 is a plan view of the modified packaging machine according to the invention.

The packaging machine 1 shown in the drawing ends in both cases with a shrink tunnel 2, in which, by the action of heat, in addition to shrinking the film material, a side closure of the shrink film band can be made so that all operations are summarized in a particularly short distance. The main component of the transport device for guiding through packaging objects 3 is provided in the area of the shrink tunnel 2 to form an endless conveyor and at least two successive conveyor belts 5 and 6 outside this area. In the gap 7 formed between the conveyor belts 5 ^ cL 6, the film web 10 created by connecting the upper film 8 and the lower film 9 crosses the transport path 11 of each packaging item 3 Welding jaws 12 and 13 are provided, which are each brought together for a short time after the respective packaging item 3 has migrated between them.

7422186 18.1176

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The unwinding device 14 arranged above the transport path 11 for the upper film supply roll 15 and the unwinding device 16 arranged under the transport path 11 for the lower film supply roll 17 each preferably comprise two parallel bearing rollers 18 on which the supply roll 15 "and 17 are only to be placed" In order to form buffer loops, a pull-in device is required in each of the "two unwinding devices IA and 16. However, these pull-in devices are not shown in the drawing for the sake of clarity.

The solution shown in Figure 2 of the drawing, in which two exchange units that can be moved out alternately on the opposite sides of the packaging machine 1 19 and 20 of the type already described are provided, has the very special advantage that for the Indians Upper film / lower film combination merely involves a displacement movement in one of the two indicated by the double arrow 21 Directions is required, which again saves a considerable amount of time. To make things easier the sliding movement, the two exchange units 19 and 20 have a right angle to the direction of passage 1.1 of the piece goods 3 extending common guide rail 22. In order to gain additional space achieve and to cope with the displacement of the exchange units 19 and 20 with a single drive, are the Exchange units 19 and 20 rigidly connected to one another. In addition, the exchange units 19 and 20 a common chassis 23, so that a smooth displaceability with a particularly small structural Effort is achieved

74221 * 6

It is easily possible to add further exchange units to the side of the exchange units 19 and 20. Another space saving, another time gain and to achieve a reduction in the production costs of the packaging machine 1 are the exchange units 19, 20, etc. graduated from one another in size with regard to the largest possible film width. As a result of that the welding device 12, 13 for connecting the upper film 8 and lower film 9 is part of the laterally movable Is an exchange unit, the top and bottom foil combination can be used also changed outside the working area of the packaging machine 1 in each exchange unit will. The measure that, in addition, the welding devices 12, 13, the exchange units 19 »20, etc. in the Opening width for the piece goods 3 to be let through are graduated from one another, has the main purpose that Operating speed of the packaging machine 1 through time savings when closing and opening the welding jaws 12 and 13 to be increased even further.

In the preferred embodiment of the packaging machine 1, a convenient operability was aimed at along with a further reduction in the structural effort. For this reason, the exchange units 19, 20, etc. have a common control device 24 zx? M Exchanging the exchange unit and operating the transport device alternating with the welding device 12, 13 of the exchange unit that has entered the packaging machine 1. It is preferably on the side arranged next to the smallest exchange unit. For easier and better support of the upper web supply rolls 15 and the associated unwinding devices 14 includes the Transport device for guiding the piece goods 3 through three successive conveyor belts · 5 »25 and 6, from

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7422186 11/18/76

which the middle conveyor belt 25 is an additional component the exchange unit that can be pulled out from the side. This embodiment of the packaging machine 1 is especially advantageous when melr are joined together laterally as two exchange units.

With the modified packaging machine 1 described, several packaging lines can easily be scraped Foil wrapping of piece goods in a packaging line z "asaiuEienfassen, since the dimensions differ from one another Objects 3 this packaging machine 1 in a colorful row with relatively close mutual Intervals after the length of time for the change of the upper film / lower film combination has been reduced to an absolute minimum. A final, Particularly advantageous embodiment of the packaging machine with regard to reduced personnel costs 1 is that the exchange units 19 »20, etc. with the help of a in the piece goods inlet of the packing machine 1 built-in dimension scanner 26 can be selected automatically. In such a dimension scanner, light barriers or against spring force pivoting mechanical feeler uses one.

11 claims

1 sheet of drawing

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7422186 11/18/76

Claims (1)

Protection claims 1. Packaging machine for Schrumpffolienumkleidung of loads einsr transport means for passing of the article, one arranged above the transport path of the piece goods AbrolleinrieMrung for one upper £ Olienvorratsrolle _t a unt3r the transport path of the piece goods arranged unwinding device for a ünterfolienvorratsroile and with a welding device for connecting Oberfoli © and lower film which allows to the transport path of the piece · guts intersecting golienbahru behind an inserted by means of the transport means in the sheet object along with a new loan transverse welding a separation of the punched into the Fclienbahn object, characterized in 'that the chute device (14) for the upper film supply roll (15) and the unwinding device (16) for the lower film supply roll (1?) © ins with an existing connection between upper film (8) and lower film (9) from the packaging machine (1) laterally removable exchange forming unit (19). 2. Packaging machine according to claim l _f, characterized in that at least two exchange units (19 * 20) which can be moved out alternately on the opposite sides of the packaging machine (1) are provided. 5. Packaging glass chine according to claim 2, characterized daaarch, that the exchange units (19, 20) are at right angles to the direction of passage (11) of the item (3) have a common guide rail (22) extending. 4 ·. Packaging machine according to claim 3> characterized in that the exchange units (19 »20) are rigidly connected to one another. 5 · Packaging machine according to claim 4 ·, characterized in that that the exchange units (19, 20) have a common chassis (23). 6. Packaging machine according to one of claims 1 to 5s characterized in that the exchange units (19, 20) in size with respect to the largest possible Foil width are graded against each other. 7. Packaging machine according to one of claims 1 to 6, characterized in that the welding device (12, 13) for connecting the upper film (8) and the lower film (9) is part of the laterally removable exchange unit (19). 8. Packaging machine according to claim 7 »characterized in that the welding devices (12, 13) of the Exchange units (19, £ 0) in the opening width for the piece goods (3) against each other are graded. 10 - - ίο - 9 · Jacking machine after. To claim 7 or 8, characterized in that the exchange units (19 _f 20) has a screened solitary control means (24) for changing the Auatautiöheiiiiieit and äum press, the transport device (5, 25, 6) alternating with the welding device (12, 15) of the each have an exchange unit driven into the packaging machine (1). 10. Packaging machine according to one of claims 1 to 9, characterized in that the transport device three successive conveyor belts (5> 25, 6), of which the middle conveyor belt (25) is an additional Part of the removable exchange unit (19) that can be pulled out from the side. 11. Packaging machine according to one of claims 1 to 10, characterized in that the exchange units (19t 20) with the aid of a in the piece goods inlet the packaging machine (1) built-in dimension scanner (26) are automatically selectable.