WO2012104090A1

WO2012104090A1 - Method for producing a pallet-free packaging unit, and packaging unit

Info

Publication number: WO2012104090A1
Application number: PCT/EP2012/000471
Authority: WO
Inventors: Norbert Frenzel
Original assignee: Maschinenfabrik Möllers Gmbh
Priority date: 2011-02-02
Filing date: 2012-02-02
Publication date: 2012-08-09
Also published as: DK2670670T3; EP2670670A1; DE102011010126B4; EP2670670B1; DE102011010126A1; ES2536297T3

Abstract

A method for producing in a simple manner a pallet-free packaging unit (24) comprising a plurality of packaging items (4) stacked to form a stack of goods (2), in which the packaging items (4) are stacked in such a manner that at least two engagement regions (10) for fork legs of a shovel loader are formed in at least one stacking plane, in which, first of all, a holding layer (12) is placed onto the stack of goods (2) in a manner covering the engagement regions (10) and packaging items (4) provided adjacent thereto, then the stack of goods (2) is wrapped with a first film (14) with the interposition of the holding layer (12), wherein the circumference of said film is preferably initially smaller than the circumference of the stack of goods (2) and, before wrapping around the stack of goods (2), is expanded to a circumference greater than the circumference of the stack of goods (2) and is applied to the stack of goods (2) with elastic circumferential tension, and the stack of goods (16) which is wrapped on one side is turned such that that part of the stack of goods (16) which has the engagement regions (10) comes downwards. According to the method according to the invention, the packaging unit is finished without use being made of a second film pulled, after the turning, over the circumference of the stack of goods (2) as a tubular hood. The present invention furthermore relates to a corresponding packaging unit.

Description

METHOD FOR PRODUCING A PALLET UNLOCKED PACKAGING UNIT AND PACKAGING UNIT

The present invention relates to a method for producing a palletless packaging unit comprising a plurality of packaging items stacked in a stack, in which the packaging items are stacked in such a way that at least two engagement areas for fork legs of a lift truck are formed in at least one stack level, the stack at least with its engagement region a first film is wrapped and the one-sided wrapped good pile is turned so that the engaging portions having part of the stack comes down.

Such a method is known from DE 26 14 558 and DE 27 02 613, which are based on the present applicant. In this prior art method, a shrink hood is pulled over the stack as a first film, which subsequently applied by heat shrinking under welding with another plastic film, which has been previously placed on the stack, closely to the stack. After turning, another shrink film hood was pulled over the stack as a second sheet and also shrunk onto the stack by thermal shrinking, welding to the overlapping portions of the first sheet.

EP 2 036 818, which is based on the applicant, discloses a corresponding method with the mutual coating of two film hoods, which are pulled over the stack of goods as stretch hoods. In this case, first and second films are prepared as a hose hood, with a circumference that is less than the circumference of the stack. The first hood is first pulled over the stack with the interposition of a previously placed on the stack top holding position overlapping the engagement areas. Thereafter, the stack is turned. The second film is referred to as a stretch hood from the opposite, i. now pulled over the top of the stack.

The present invention is based on the problem to simplify a generic method.

In view of this, the present invention proposes a method having the features of claim 1. In this method, the second hose hood pulled over the stack of goods in the prior art from the final top side is distorted. tet. The packaging unit produced by the method according to the invention is usually open at the top, ie the top of the stack is formed wholly or partially from the top of the last stack level of the packaging unit.

After attempts of the applicant has surprisingly been found that it is not necessary for a secure bond and in particular a durability of the packaging unit to the effect that it can be lifted with the fork legs of a lift truck, from the final upper side a second hose hood over the stack pull and put on the stack.

The application of the hose hood can be done by shrinking against the stack. However, the method according to the invention is carried out in particular as a hood stretching method, i. the film hood is prepared with a circumference which is smaller than the circumference of the stack and initially stretched to a circumference greater than the circumference of the stack and finally applied to the stack under elastic hoop stress.

According to a preferred embodiment of the present invention, the first film is pulled over substantially the entire side surfaces of the stack. The first film accordingly extends in the finished, i. upturned stack to the top of the same, is partially on the surface of the stack of goods. As a result, a certain locking of the hose hood is achieved, which ensures that a usually introduced into the hose hood when overstretching over the stack of goods longitudinal tension is maintained. In other words, the film preferably lays on the top of the stack of goods in the manner of a collar.

According to a preferred embodiment of the present invention, the holding layer is placed as a film web on the stack so that the holding position extends in any case partially over the opposite longitudinal sides of the stack of goods. In particular, this involves an arrangement of the retaining layer in this manner on those longitudinal sides which extend parallel to the engagement regions.

To increase the strength, it is proposed according to a preferred development to apply the retaining layer as a short hose hood with elastic circumferential expansion of the stack. To simplify the process management and to recycle the envelope of the stack of goods is proposed according to a preferred embodiment of the present invention that the holding position is formed from the film material of the first film. The retaining layer can be formed double-layered.

Preferably, the retaining layer is formed from a fabric-reinforced film web. In particular, it can be a film web reinforced with a lattice structure, which leads to a significant amount of vibration being achieved between the holding layer and the first film, resulting in an intimate bond between the holding layer and the film.

With the independent claim 8, a product according to the invention, i. claimed a packaging unit, which is completed without a second, drawn after turning as a hose hood over the circumference of the stack of goods film. Again, the top of the patented product is preferably formed entirely or at least predominantly by the surface of the topmost stack layer. On this a track made of plastic can be used as weather protection.

Further details and advantages of the present invention will become apparent from the following description of an embodiment of the present invention taken in conjunction with the drawings. In this show:

Figure 1 is a stacked stack before wrapping with foil;

Figure 2 shows the stack shown in Figure 1 after placing a holding position;

Figure 3 shows the stack shown in Figures 1 and 2 after coating with a first formed as a hood foil; and

Figure 4 shows the one-off wrapped in the stack shown in Figure 3 after turning.

1 shows an embodiment of a stack of goods 2 with several summarized in a stack level packaging items 4, which should be formed in the present case by cement bags. On top of each other several levels of packaging items 4 are stacked. Each stack level has in the normal layers 5, the same number of packaging items 4, so that there is a substantially cuboid stack 2. Only the upper layer is formed as a special layer 7 and has less packaging items 4, so that at the edge of the stack between the Upper side 6 and opposite side surfaces 8 engagement portions 10 are formed, which extend at right angles to the plane of the drawing parallel to the side surfaces 8, over the entire depth of the stack 2. The width of the engaging portions 10, ie the distance between the side surface 8 and the parallel side surface of the upper packaging items 4.1; 4.2 is chosen so that the fork legs of a lift truck can be driven almost or completely under the normal layers 5 of the stack 2 and thus in the engaging portions 10.

The stacked stack 2 is driven, for example, over a conveyor line, such as a conveyor belt in the direction of a hood stretcher (see, EP 1 013 549). As shown in FIG. 2, on the way to the hood stretcher, a holding layer 12 is placed on the upper side 6. The length of the retaining layer 12 is dimensioned such that a flat layer forming the retaining layer 12 lies both on the upper side 6 and partly along the side surfaces 8. The retaining layer 12 is located in Figure 2 in a loosely placed on the stack 2 state. In a hood stretcher is now formed in a conventional manner by cutting an endlessly conveyed tubing, end-side welding and cutting a length of the tubing a hose cap of a first film 14, which is first reefed and elastically stretched by moving apart of refiners in the circumferential direction, i. is stretched, to an extent that is greater than the footprint of the stack 2. This transversely stretched tubular hood is now applied by subtracting from the refiners first on the top 6 and then on the side surfaces 8 of the stack 2 at relative movement between the refusers and the stack 2 in the height direction of the stack 2. Usually, the Refffinger be lowered. Thereafter, the stack 2 is wrapped on one side of the first sheet 14 and covered on the top. The cover takes place with the interposition of the holding layer 12. The first film 14 lays against the circumferential walls of the stack 2, i. the side surfaces 8 and thus pushes the web of the retaining layer 12 against the stack 2 (see Fig .. 3).

The retaining layer 12 has a dimension in the depth direction of the stack 2 substantially corresponding to the depth of the stack of goods. In other words, the front and rear edges of the retaining layer 12 extend substantially parallel to the front and back of the stack 2, ie those side surfaces which form the periphery of the stack 2 and extend at right angles to the marked in the drawing by 8 reference side surfaces.

After coating the first film 14, the one-sided wrapped and identified by reference numeral 16 good stack is turned so that when placing the holding layer 12 and the coating of the first film 14, the top 6 forming surface now forms the bottom 18 of the stack 16 and down is located and a bottom 22 comes up and the surface of the stack of goods 2 forms (see Figure 4). In this position, the one-sided wrapped good stack is usually fed and discharged via a transport route a hood stretcher. The packaging unit is now completed.

LIST OF REFERENCE NUMBERS

stack

Packaging articles

normal position

top

special location

faces

engagement area

holding position

first slide

one-sided wrapped good stack

ground

bottom

Claims

claims

1. A method for producing a palletless, more to a stack (2) stacked packaging items (4) comprising packaging unit (24), wherein the packaging objects (4) are stacked such that in at least one stack level at least two engagement portions (10) for fork legs a lift truck are formed,

in which first a retaining layer (12) the engagement areas (10) and adjacent thereto provided packaging items (4) overlapping on the stack (2) is placed

Thereafter, the stack (2) with the interposition of the holding position (12) with a first film (14) is wrapped, preferably whose circumference is initially smaller than the circumference of the stack (2) and before the wrapping of the stack (2) on a Scope is greater than the circumference of the stack (2) stretched and applied with elastic hoop stress to the stack (2) and

the one-sided wrapped good stack (16) is turned so that the engaging portions (10) having part of the stack (16) comes down,

characterized,

that the finished packaging unit (24) without a second, after turning as a hose hood over the circumference of the stack of goods (2) pulled finished film is completed.

2. The method according to claim 1, characterized in that the first film (14) is pulled over substantially the entire side surfaces of the stack (2).

3. The method according to claim 2, characterized in that the holding position (12) is placed as a film web on the stack (2) that the holding position (12) extends in any case partially over the opposite longitudinal sides (8) of the stack (2) ,

4. The method according to claim 3, characterized in that the holding position (12) is applied as a short hose hood under elastic circumferential expansion of the stack (2).

5. The method according to any one of claims 3 or 4, characterized in that the holding position (12) from the film material of the first film (14) is formed. δ

Method according to one of claims 3 to 5, characterized in that the holding position (12) is formed from a tissue-reinforced film web.

Method according to one of claims 3 to 6, characterized in that the holding position (12) is formed of a reinforced with a grid structure film web.

A packaging unit (24) comprising a plurality of layers of stacked packaging articles (4) stacked to form at least two fork leg engaging portions (10) in a stacking plane and having one surface (6) and at least portions of the side surfaces (FIG. 8) and the engaging portions (10) enveloping hood of a first film (14) with the interposition of the engagement areas (10) and adjacent thereto provided packaging items (4) covering holding position (12) is placed as a stretch hood on the stack (2) .

characterized,

that the finished packaging unit (24) without a second, after turning as a hose hood over the circumference of the stack of goods (2) drawn film is completed.