DE3336479A1 - DEVICE FOR SHRINKING A FILM COVER ONTO A PACKAGE - Google Patents

Abstract

1. A device operating in the vertical direction of movement for shrinking a plastic sheet envelope (6) on to a pack (5) comprising, in particular, a pallet, a shrink hood (1) of a size sufficient to cover the pack and pallet, if used, which can be raised and lowered by means of a hoisting device and which inside is equipped with heaters for shrinking the plastic sheet envelope when lowered over a pack loosely covered with the said plastic sheet envelope, said pack being conveyable to the area underneath the shrink hood (1) by means of a conveyer and raisable from that conveyer by means of a lifting device far enough to permit the plastic sheet envelope (6) to hang down freely beyond the bottom edge of the pack (5) or the pallet, characterized in that the hoisting device for the shrink hood (1) and the lifting device for the pack (5) are coupled together to be jointly driven by a common hoist drive (2, 16) incorporating a compensating device (11-14) to compensate for the difference in length between the lowering travel of the shrink hood (1) and the shorter lifting travel for lifting the pack (5) or pallet (8) from the conveyer (7).

Description

Device for shrinking a film sleeve onto a package

The invention relates to a device for shrinking a film sleeve onto a package, in particular with a Range, with the features listed in the preamble of claim 1.

In a known device of this type, a lifting drive is used to raise and lower the shrink hood and separately of which a lifting device with its own drive is used to raise and lower the package. These separate drives cause a considerable amount due to the coordination of the movements of the shrink hood and package with one another Control and cost expenditure.

The invention is therefore based on the object of creating a device with which this effort is reduced will.

This object is achieved according to the invention with the in the characterizing Part of claim 1 specified measures solved.

The drive according to the invention for the movement of the shrink hood and package in opposite directions requires practically none Control effort and reduces the costs for the creation of the device. At the same time, it enables a simultaneous Lowering the shrink hood over the package and lifting the package off the conveyor as required.

Appropriate refinements of the invention emerge from the subclaims.

An exemplary embodiment is shown in the drawing and explained below. Show it:

Fig. 1 shows the device in section transversely to the conveying device of the packages /

LO Fig. 2 shows the device in side view with in

Initial position of the shrink hood,

3 shows the same side view with a lowered one

Shrink hood and raised Pa] - ¹ ^ t in end-L5 position for the shrinking process.

The shrink hood 1 consists of a box that is open at the bottom and is equipped with heating devices (not shown) on the inside is and is suspended via cables 3 on cable drums 4 can be raised and lowered. The cable drums 4 are on an im Scaffold 15 mounted horizontally, driven by a motor 16 trowel 2 attached. The one to be shrunk Package 5 with the shrink-wrapping insulation 6 slipped loosely over it is placed under the area with a conveyor device 7 brought the shrink hood 1, where usually the Package 5 is on a pallet 8. For shrinking the

Film envelope 6 on the package 5, the shrink hood 1 is lowered over the package 5 (Fig. 3), which at the same time is lifted from the conveyor 7 so far that the lower edge of the package 5 or the pallet 8 is free stands and the ends of the film envelope 6 hang freely. The drive shaft 2 is used for lifting and lowering Package 5 attached outside of the cable drums 4 chain wheels 17 over which endless chains 10 run. On the chains 10, a lifting frame 9 which surrounds the package or the pallet is suspended via loose chain wheels 18. One link Each chain 10 is a spring 11 which is tensioned in the initial position, i.e. with the hood 1 raised and the package 5 lowered

can be. Another link of each endless chain 10 is a rod 12 located below the spring 11 with it adjustably attached stop 13. The rod 12 is guided in an eyelet 14 functioning as a counter stop, δ which is attached to the frame 15 of the device. If the shrink hood 1 is now over by means of the drive shaft 2 the cable drums 4 are lowered, the endless chains 10 are simultaneously set in circulation by the shaft 2, namely until their stop 13 hits the counter-stop 14 hits. From this moment on, the endless chains 10 become the pulley block and the springs 11 simultaneously relaxed. As a result, the lifting frame 9 with the package 5 on the conveyor is down and raised so far that the film cover 6 hangs freely from the lower edge of the package 5 or the pallet and is shrunk can. To adjust the stroke, the stop 13 can be attached to the rod 12 in an adjustable manner. The hub of the frame 9 is determined by the distance between the stops 13 and 14 in the starting position.

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Claims (4)

No. 171 Hans Lingl Plant construction and process engineering GmbH & Co. KG Albrecht-Berblinger-Strasse 6 New Ulm Claims 15 \ 1 ·! Device for shrinking a film cover onto a V ^ / package, especially with a pallet, with a lifting and lowerable shrink hood, which is designed inside with heaters for shrinking the film envelope, including a package loosely covered with the foil sleeve 2Q is lowered, which with a conveyor conveyed under the area of the shrink hood and can be lifted off the conveyor to the extent that the film envelope hangs freely over the lower edge of the package or the pallet, characterized in that 2g for the shrink hood (1) and the package (5) a common one Lifting drive (2, 16) is provided which contains a compensating device (11), which compared to the Lowering path of the shrink hood (1) shorter stroke for lifting the package (5) or the pallet (8) from the OQ conveyor (7) regulates. 2. Device according to claim 1, characterized in that that the common drive is a top in a frame (15) has horizontally mounted drive shaft (2) to which 2g rope drums (4) are attached, on whose hoisting ropes (3) the shrink hood (1) is suspended that further on the drive shaft (2) outside the cable drums (4) Chain edges (17) are attached, over which endless chains (10) run, on which loose chain wheels (18) a the package (5) or its pallet (8) under- the lifting frame (9) is attached, and that each chain (10) as a compensating device, a link consisting of one Spring (11) and a stop (13) below the spring (11) which, when lowering the shrink hood (1) encounters a stationary counterstop (14) that the chains (10) now acting as a block and tackle below simultaneous relaxation of the springs (11) the lifting frame (9) with the package (5). 3. Apparatus according to claim 2, characterized in that the stops (13) of the chains (10) on as rods (12) trained chain links are attached and the counter stops (14) from eyelets attached to the scaffolding (14) exist, in which the rods (12) are guided. 4. Device according to claim 3, characterized in that the stops (13) of the chains (10) on the rods (12) are attached so that they can be adjusted in height.