EP3074325A1

EP3074325A1 - Flexible large container with a seam-free useful space

Info

Publication number: EP3074325A1
Application number: EP14761622.1A
Authority: EP
Inventors: Bülent TAVSANLI; Alev Ulviye ERGEN; Cenk Kadir BOSTAN; Atilla Teoman Bostan
Original assignee: Individual
Current assignee: Alsan Plastik Tekstil Ve Metal San Ve Tic Ltd S
Priority date: 2013-11-25
Filing date: 2014-09-05
Publication date: 2016-10-05
Anticipated expiration: 2034-09-05
Also published as: ES2654435T3; EP3074325B1; DE102013113020A1; PL3074325T3; US20160355331A1; WO2015074779A1; US11292664B2; DK3074325T3; NO2990385T3; PT3074325T

Abstract

In a flexible large container intended for accommodating a filling product and formed from a plurality of interconnected sections, wherein the large container has a plurality of surfaces which are defined as walls and base and which enclose a useful space accommodating the filling product, and wherein the large container is provided with carrying loops allowing the filled large container to be lifted, the invention proposes that the large container has a cover and the sections enclosing the useful space are welded to one another, and that the sections extend beyond the dimensions of the useful space in such a way that a border which projects beyond the useful space is created along the upper peripheral edge of the useful space, and that the carrying loops are sewn onto the border in such a way that the useful space is free from seams.

Description

"Flexible large container with seamless workspace"

Description:

The invention relates to a flexible large container according to the term of claim 1 O. Such containers are also known as so-called big bags. The container-forming portions are usually made of fabric, such as a ribbon fabric, which has intersecting, flat, made of plastic tapes as fabric fibers. In practice, polypropylene is often used as a plastic for the fabric material for reasons of economy in practice. Polypropylene has excellent mechanical properties and is inexpensive, but it is difficult to weld. The individual sections which form the container and surround the work space are therefore sewn.

In particular, when fine-grained product to be transported or stored in the container, such as powdery filling, the tightness of the container is of great importance. In particular, when the product comes from the field of food processing industry, such as flour, it should be prevented that vermin is attracted by leaking filling material. If the product comes from the field of pharmaceutical or chemical industry, it should be prevented that uncontrolled substances from the flexible large containers in the

Get free. For this reason it is known to use the seams To produce a special suture, which should fill the suture holes as well as possible and ensure sufficient tightness of the flexible large container. Of the problem of leaking seams basically all seams are affected, for example, those where the individual sections are sewn together to create the working space of the large container. However, some seams are particularly heavily loaded, for example on the carrying straps, which serve to lift the container with a corresponding hoist, z. B. with a crane, forklift or the like. The carrying straps usually consist of a textile belt material and are connected to the flat sections of the flexible large container, eg. As the mentioned tissue, sewn. In the area in which connect the carrying straps to the other large container, the seams are subject to considerable mechanical stress, so that here the suture holes can be widened and the risk of leaks is particularly large.

The sewing of the individual sections to create a flexible large container can not be satisfactorily automated according to the current state of knowledge. Due to the manual production of the seams, it can not be ruled out that a fraction of the large containers produced, albeit a smaller one, has defective, namely leaky seams. Suture defects may be in the form of missing sutures, for example, which increases the load on the remaining existing sutures and aids in the undesirable suturing or tearing of suture holes. However, sewing defects can also be present in the form of unused seam holes, through which no thread passes.

Apart from the mentioned attachment points of the carrying straps and the bodies are exposed to special loads, where in so-called dimensionally stable containers in the

Corner areas of the container provided by the utility room Join extending oblique reinforcements to the container walls.

The particularly heavily loaded areas are not only loaded while the flexible bulk container is lifted by means of a hoist, but also, for example, during a vibration-assisted filling or emptying, or when several full containers are stacked on one another, or if the filled container is not completely on one side Stand up, but for example, only on the fork of a

Forklift rests.

For this reason, it is known to introduce a so-called inliner into a flexible large container, that is to say a separate inner container which is introduced into the useful space of the large container formed from a fabric. In this way, the properties of the flexible large container in terms of cleanliness, especially in pharmaceutical quality requirements, as well as in terms of tightness improved, both the leakage of material from the container to the outside as well as the penetration of gas or moisture into the work space. The inner container may for example be formed from films and thus ensure the desired tightness. Multilayer films can be used to ensure the desired barrier effect.

The problem with the use of such liners, however, that they can move uncontrollably within the outer, formed from the tissue large container. Apart from handling or processing errors in the

Manufacture of the container, when the films are used twisted, they can be due to the free mobility in folds or clump together, so that either the filling process of the large container is hindered or the emptying of the large container can not be completed. To firmly connect the inliners with the outer container material is in many Cases due to the thereby impaired recycling opportunities disadvantageous, for example, due to the properties of an adhesive used for the compound.

From US 2003/0 235 350 A1 a generic large container is known which is to be used in particular for meat and meat products, and which has a separate, arranged in the actual container inner container, which is known in the industry as a "liner" The walls and floor are made of several pieces of material that are sewn together.The large container is open at the top and has no upper lid.The walls are reinforced at their upper ends by an additional band, which extends across all walls along the entire upper edge Carrying loops extend in two directions beyond this reinforced upper edge: on the one hand they form above each of the edge of the loop, which is intended to handle the large container, and in the other direction, they are the walls and are sewn there with the walls.

The invention has for its object to improve a generic flexible large container to the effect that this is easily filled and emptied, and has a reliably dense work space, and easily handled, in particular lifted, transported and can be stacked.

This object is achieved by a flexible large container with the features of claim 1. Advantageous embodiments are described in the subclaims.

In other words, the invention proposes welding the sections of the flexible large container together. Apart from the fact that the weld seam itself can easily be made tight, a welding process can also be carried out automatically. be mated so that the manufacturing cost of the large container are positively influenced. For this reason, for example, a container material can be used, which is particularly well suited for welding and, for example, is slightly more expensive to purchase than the material otherwise used for sewn large container.

According to the proposal, it is further provided that the carrying straps are fastened outside the work space, which is enclosed by the welded container sections. Regardless of whether the straps are attached by welding or - as is usually the case - by a proper sewing on the hem, the stresses that act there on the large container where the straps are attached to the container material, thus outside the work space on. Leaks that might occur in the area of these attachment points are therefore completely uncritical, namely because a tightness in the region of these attachment points, outside of the work space, is not required and the work space is free of seams. For this purpose, the sections that make up the large container extend beyond the work space, thus forming a protruding seam at the upper edge of the work space, and at this hem, the carrying straps are attached.

The proposed large container has a lid which limits the usable space upwards. Therefore, the walls of the large container may extend beyond the lid and form the hem there. In contrast to large containers in which the walls are sewn with the lid and in which therefore no seam can result, but only a Nahtwulst that measures a few millimeters to a few centimeters, the proposed proposed seam is so large that he Connection of carrying loops, which are sewn exclusively to this hem and not with a wall of the container. The hem therefore has a height of several ren centimeters, for example, 8 to 15 cm, so that a stable connection of the straps to the hem is made possible.

The seam can be designed either completely circumferentially along the upper circumferential edge of the work space, ie on all four walls of a cuboid work space, so that from the carrying straps forth a force distribution can be distributed over a large area distributed in the walls of the large container. Alternatively, however, it may be provided to provide the seam only in sections at the upper edge of the work space, for example, above two opposite walls, and at the respective outer ends of these two hem sections each provide a carrying loop, so that also in this embodiment a cuboid bulk container can be lifted at its four upper corners and can be handled in a conventional manner. The carrying loops can also be configured as so-called tunnel loops by two opposite sides above the lid over the entire width form a tube, namely the so-called tunnel.

The straps are proposed to be attached to the hem. This attachment can be done immediately, so a strap so be connected directly to the hem. However, the attachment of the strap to the hem can also be done indirectly, for example by the strap is attached to a belt and this strap is in turn attached to the hem, for example, welded or sewn to the hem. If the belt is attached to the hem, this can be done with the involvement of the straps, so that at the attachment point of the belt, the strap and the hem are connected together.

The attachment of the straps to the hem can, for example, by a classic seam using Suture material or by the strap is welded to the seam. In particular, with a suturing the transmission of high tensile forces can be ensured and the tearing of the straps from the hem can be reliably avoided. Below is therefore, purely by way of example and representative of other mounting options, a suturing of the straps mentioned as attachment of the straps to the hem.

The carrying loops can be formed in a first embodiment by a belt which runs along the seam. The belt is sutured substantially over its entire length with the seam, but forms the loops as non-stitched portions of the belt, in which the belt does not touch the hem, but runs approximately Ω-shaped. In this way, the protruding from the hem support loops are created, where a hoist can be attached, which for example has hooks where it should detect the straps.

According to a second embodiment, the carrying straps can be configured as separate elements, for example, extend approximately U-shaped and are attached with its two ends to the hem. In this embodiment, too, it can be provided that a belt runs along the seam, the belt in this case serving as a reinforcing element which distributes the forces acting through the carrying straps over a larger area of the large container along the seam. The straps can for example consist of the same material as the belt itself.

In this second embodiment with separately designed carrying straps, a particularly reliable and durable attachment of the carrying straps can advantageously be effected by the fact that they engage under the belt at their ends, wherein the carrying loops in the region of such an end in each case approximately U-shaped. In this way, the end of the strap is on both sides of the belt. The seam, which is provided for fixing the carrying strap to the belt, extends through these three layers of material, namely through the two sections of the carrying strap which comprise the strap and through the section of the strap therebetween. This seam, which is provided for fixing the carrying strap to the belt, can also extend through the seam, so that the carrying loop, belt and seam are connected to one another by the same seam.

Alternatively or in addition to reinforcing the hem by a circumferential belt, the container material can be reinforced even where the carrying straps connect to the hem. Typically, the large container is made of a fabric, wherein the side walls are extended over the lid to the top and there form the hem. Where the straps connect to the hem, these fabrics can have a higher density, such as twice to three times the fiber density. For example, it may have 20 to 25 fibers per centimeter, while otherwise the fabric may have, for example, about 10 fibers per centimeter. In particular, the vertically extending fibers are arranged closer, so that the load can be distributed over the entire container height. In the production of the fabric, this can be achieved for example by a correspondingly different density arrangement of the warp threads.

According to a third embodiment, the carrying loops can be configured as the above-mentioned tunnel loops, in that on two opposite sides the fabric of the side walls above the lid, ie where it forms the seam, is turned over on itself and thus forms the respective tunnel loop, that is, a tube extending parallel to the lid, at least at one of its two ends, and typically at both ends, is open, thus allowing the insertion of a lifting tool.

Advantageously, the sections of the large container contain polyethylene, which, although compared to polypropylene higher acquisition costs, but is weldable, thereby enabling automated connection of the sections with each other. The sections may be made entirely of polyethylene, but it will often be advantageous to add additives such as color pigments, antistatic agents or the like to the material so that the sections are not made entirely of polyethylene. The advantageous properties of the polyethylene are particularly effective if the sections consist to a large extent of polyethylene. Polyethylene (PE) is also well suited because, in addition to good weldability, it also has good resistance to UV radiation, heat, cold and seawater and is easy to recycle.

If one assumes, for example, that the sections are configured in a manner known per se as a woven fabric, then the first fabric fibers extending in one direction, for example the plastic tapes mentioned above, may contain polyethylene, while the second fabric fibers running in another direction , which intersect with the first fabric fibers, may consist of a different material. Advantageously, however, all fabric fibers, for example, all ribbons, contain polyethylene to allow in this way as large as possible welding along the weld line and to support in this way a particularly dense configuration of the large container.

Polyethylene is known in a variety of variations, which are commercially available under trade names such as LDPE, LLDPE or HDPE. Such variants or from these variants Material mixtures of the polyethylene produced can be used in principle in the context of the present proposal. Due to its high strength, it is particularly advantageous to use high-density polyethylene, which is also commercially available as a high-density polyethylene, or HDPE for short.

However, a particularly dense configuration of the large container, for example in order to prevent the penetration of gas or moisture, can also be ensured by the fact that the sections of the container are formed from a laminate. The design of such a section of a fabric is provided in a conventional manner. On the fabric, however, a plastic film is laminated as an additional layer, said plastic film when finished

Large container is aligned towards the interior of the work space. This film can either have a microperforation or be designed completely closed. In any case, it allows a complete tightness of the relevant section, even against very small particle sizes of the contents, for example, in powdery product. This designed as a so-called liner film that is laminated to the fabric has polyethylene or is made entirely of polyethylene and thus ensures easy weldability with adjacent sections, so that in this way the complete tightness of the bulk container can be guaranteed against powdered product.

Advantageously, the large container can be configured in a dimensionally stable manner in a manner known per se, by each two adjacent walls of the large container, which form a corner region, are connected to each other by means of an obliquely extending strut. This bracing is flexible and can consist of a network, a film section, a fabric o. The like. Exist. The strut has through openings for the contents, so that it is ensured that within the Workspace and the space enclosed by the corner of the two walls and the bracing space can be filled with contents and later the contents can be easily removed from this corner again, if the flexible bulk container to be emptied.

The proposed provided according seam on which attack the straps can advantageously extend beyond the work space upwards, namely, by the sections is created, which also form the walls and extend higher than the lid of the large container, ie up to the weld by means of which the lid is connected to the walls. In this way, an optimal introduction of force is supported by the carrying loops in the container, since the self-imposed by the weight of the filled container down pulling forces from the carrying straps can be absorbed and within the same portion of the large container. This embodiment of the large container is more advantageous for mechanical reasons, as if the seam would be formed, for example, by a particularly large lid, which would extend to the side, beyond the walls, to the outside. The struts are also welded to the walls of the work space, so that even at these points by eliminating seams, the benefits of the present proposal are supported.

Advantageously, a fast and low-dust filling and emptying of the large container can be supported, and the large container be designed reusable multiple times that in the lid and / or in the bottom of a pipe socket is provided, which can be provided to protect against contamination with lids or rosettes. This pipe socket is designed as a separate section of the large container, which consists of the same material as the lid or the bottom, with which this pipe socket is connected, in particular advantageously welded. A closure of the container can then be done in a simple manner that this pipe socket is tied in a conventional manner, or is knotted with sufficient length of the pipe socket. By using such pipe socket, it is not necessary to close the filled bulk container by welding and later to open with destruction, for example by a section of the large container is cut. Instead, the contents can be filled in portions in the useful space and later removed in portions, wherein the respective pipe socket can be closed again in between each.

Advantageously, the pipe socket, which is provided as an inlet connection for filling the large container or as a discharge nozzle for emptying the large container, consist of a lighter material, for. B. from a lighter tissue than the side walls of the large container. This ensures that the pipe socket can be handled as easily as possible and tightly sealed as possible, since the material used is not as stiff as the more viable, stronger material that forms the side walls. If it is not intended to empty the bulk container overhead, namely the weight of the payload would act on the lid, but if specifically a bottom drain is provided, the lid may also consist of the lighter material, which is also used for the pipe socket.

Alternatively, to provide a pipe socket as an inlet or outlet nozzle of the large container, in particular the lid and / or optionally the bottom can be configured as a so-called skirt, which allows an opening over almost the full container cross-section and thereby particularly fast filling operations.

The aim of the present proposal is to provide a large container whose working space is free of seam holes and its Manufacture can be automated. Usually, large containers are sewn, and usually consist of a fabric having filaments of polypropylene (PP) in both weaving directions. In order to allow the production seam-free, the container sections surrounding the work space are proposed according to the proposal instead of sewn.

In order to allow a weld, a fabric is used, which has a proportion of polyethylene (PE). In this case, all threads of the fabric or at least threads in one of the two weaving directions of HDPE, LLDPE or MDPE exist, ie polyethylene materials of different crosslinking or density, or of a mixture of PE grades and PP, or similarly suitable weldable materials.

In addition, the welds must be designed so that they withstand the loads acting on the bulk container. Therefore, can be advantageously provided, at least at particularly high stress points such. B. at the bottom and side seams, the sections other than sewing together: while sewing the two sections to form an approximately Y-shaped seam area, so that tensile forces burden the seam, the two can in the proposed large container connecting sections are advantageously welded together overlapping, so that act on the weld shear forces, whereby the seams are more resilient.

Advantageously, when welding between the two parts to be joined, an intermediate layer may be provided which contains polyethylene. This increases the adhesion of the two parts noticeably, z. For example, in trials the seams could withstand loads that occurred at a fivefold and even six times the rated load of a bulk container, e.g. B. by a designed for 1 000 kg large container with 5,000 kg or 6,000 kg was loaded. For example, a polyethylene film may be welded, which is fed as a separate strip into a gap between the two parts, or it may be laminated as a surface layer to one or both of the parts to be welded together.

Supporting elements that serve to lift and transport the bulk container, including the payload, are formed in the form of separate carrying loops, or in the form of tunnel loops, which are created from the tissue, which z.

B. forms the side walls of the large container by flipping the fabric at the upper edges of two opposite sides and so forms the respective tunnel loop. The support elements can advantageously be fastened to the seam by means of classic seams, that is to say using suture material and with the production of seam holes, since such sewing allows particularly high seam strengths, which are frequently higher than when the seams are designed as weld seams. So that the working space of the large container remains free of seam holes, the side walls are cut out protruding beyond the lid and a sufficiently wide seam above the lid, which bounds the useful space upwards, is formed. The aforementioned seams of the support elements lie exclusively in the area of the hem. The hem is either all around at all

Pages, or possibly created only on two opposite sides of the large container. In order to provide sufficient hold for the stitched loops in the case of use of carrying loops, the fabric in the seam, where the trays are to be sewn later, may be reinforced, for example more densely woven than in adjacent regions of the fabric. The separate straps are sewn to the hem with both ends. The tunnel loops are created by turning over the hem forming fabric so that the original height of the hem is reduced, e.g. B. is about halved, and then the bottom end of the folded area is sewn to the rest of the hem, so that also in this case, the attachment of the strap on the hem.

The proposed embodiment of the bulk container can be provided in any known per se container types, z. For example, the large containers can be configured as dimensionally stable containers with inside reinforced corner regions, as containers with separate inliners, or as containers with laminated liner (also multi-layered).

An embodiment of a proposed large container is explained in more detail below with reference to the purely schematic representations. It shows

Fig. 1 is a perspective view of a flexible

Large containers,

2 shows a detail, namely the end region of a carrying strap, where it adjoins a strap,

3 is a perspective view of a horizontally cut flexible large container, which is designed as a dimensionally stable container,

Fig. 4 is a conventional seam for connecting two

Container parts,

Fig. 5 is an overlapping configured seam, and

Fig. 6 is a seam according to FIG. 5 in the transition region from

Bode to a side wall of the large container.

In the drawings, 1 denotes a flexible bulk container having a generally cuboid, z. B. substantially cube-shaped, embodiment. The large container 1 has four walls 2, a lid 3 and a bottom 4. The walls 2 extend beyond the cover 3 also upwards and form there a continuous circumferential seam 5. Notwithstanding the illustrated embodiment, 5 openings for drainage purposes in the seam be provided, to prevent accumulation of water on the lid 3.

The large container 1 has a working space 6, which is bounded by the walls 2, the lid 3 and the bottom 4. This work space 6 is embodied so tight that pulverulent filling material contained therein is reliably held in the large container 1. For this purpose, the several sections which form the large container 1 and the utility space 6 surrounded, welded together. For example, the walls 2 may be configured in the following ways to provide the four walls 2 annularly surrounding the work space 6: they may be configured as four separate sections joined together by four welds. Or they can be configured as two L-shaped sections or a U-shaped and a second, straight section, so that in these cases the walls 2 have a total of two welds. Or, they may be formed by a single circumferential section, the two ends of which are welded together so that in this case they have only a single weld. The walls 2 may even be made seamless, for example, when configured as a section of tubular fabric How it can be woven seamlessly on a circular loom, for example.

The walls 2 are connected to the bottom 4 along a lower circumferential weld seam 7, whereby the designation of the weld line as a "weld seam" is merely a common name for the weld line. in which the two interconnected sections of the large container 1 are not perforated, so that even in the region of the weld 7, the desired tightness of the usable space 6 is ensured. Similar to the bottom 4 and the lower weld 7, the cover 3 is tightly connected to the walls 2 along an upper weld 8, so that in this way the work space 6 is sealed on all sides. For filling the work space 6, a pipe socket 9 is provided, which is welded along a weld 10 with the cover 3 and consists of the same flexible material as the lid 3. Similarly, the emptying of the usable space 6 is made possible by a pipe socket 1 1, which connects by means of a weld 12 close to the bottom 4 and consists of the same flexible material as the bottom. 4

At the upwardly above the lid 3 projecting seam 5 is circumferentially sewn on a belt 14, wherein in favor of a particularly stable attachment several seams through the belt

14 and the seam 5 run, z. B. zigzag and / or parallel to each other. The case while the seam 5 and the belt 14 passing through perforations are uncritical for the desired tightness of the large container 1, as these perforations are outside of the usable space 6.

In the areas of the four corners of the lid 3 close to the seam 15 carrying loops 15 which allow the lifting and handling of the large container 1 by means of suitable lifting equipment, which are known per se in practice. These carrying loops 15 are made of the same material as the belt 14 and are sewn at its two ends in each case with the belt 14 and the seam 5.

Fig. 2 explains, in a soft way, an end of a strap

15 adjoins the belt 14, wherein the belt 14 and the carrying strap 15 are each only partially shown. An end region of the carrying loop 15 extends in a U-shape and surrounds the belt 14, so that the carrying loop 15 abuts the belt 14 on both sides. By way of example only, two seams 16 are shown, which extend through these three layers of the support Loop 15 and the belt 14 extend and in this way secure the carrying loop 15 on the belt 14, so that the transmission of high tensile forces from the carrying loop 15 to the belt 14 is made possible. In addition, the seams 16 also extend through the seam 5.

In the embodiment shown in FIG. 2, it is provided that the seams 16, with which the belt 14 is fastened to the seam 5, also serve for fastening the carrying loops 15 to the belt 14. Deviating from or in addition to this, a separate seam can be provided in order to fasten the carrying loop 15 to the belt 14 so that, for example, the belt 14 can be prefabricated with carrying loops 15 and then this unit is fastened to the seam 5 overall by means of the seams 16.

In the embodiment shown in FIG. 1, the belt 14 runs all the way along the seam 5. Notwithstanding the illustrated embodiment, it could be provided that the belt 14 does not run into the corner of the seam 5 in the region of the four corners of the cover 3 but rather to form the carrying loops 15 directly through the belt 14 itself, so that the belt 14 is sewn between the two carrying loops 15 each with the seam 5, but in the region of a carrying loop 15 is guided approximately Ω-shaped and not in this area the seam 5 is sewn.

In Fig. 3, a flexible large container 1 is shown in a perspective view from below. As in the embodiment of FIG. 1, a pipe socket 1 1 is welded to the bottom 4 by means of a weld 12. The pipe socket 1 1 can be tied off by means of a sealing tape 17 to close the large container 1 in this way. The fastener tape 17 is sewn to about half of its length, that is approximately in the middle, with the pipe socket 1 1 and thus immediately ready for use to set the pipe socket 1 1 .. Deviating from the illustrated embodiment, however, it can also be attached to the large container 1 as a separate element, or it can be sewn to the large container 1 selectively, for example with one of its two ends, so that it is captive as part of the large container 1 from the manufacturer can be delivered to the customer. Before the desired use of the closure tape 17, it can either be separated from the remaining large container 1, for example, cut off or torn off, or it is configured so long that it still remains sewn to the large container 1 and at the same time with its free end Setting the pipe socket 1 1 allows. In Fig. 2, the large container 1 is shown transparent and only up to a part of its entire height, so that the upper portions of the walls 2 and the lid 3, the seam 5 and the like are not visible in Fig. 3. The large container 1 is designed as a dimensionally stable container by each two adjacent walls 2 of the large container in the corner region in which they adjoin one another, are connected to each other by means of an obliquely extending strut 18. The struts 18 each have a plurality of openings 19, so that a free-flowing product, for. As a powder, easily flow into the triangular prismatic spaces or can flow out of them for emptying. In order to enable a complete emptying of the large container 1, the braces 18 do not border the floor 4 and the ceiling 3, but end at a distance therefrom.

Fig. 4 shows a conventional seam for connecting two container parts 20 and 21, which are sewn together. The two container parts 20 and 21 abut one another at an angle and then run parallel to one another, so that there is a so-called flag 22 and an approximately Y-shaped overall Seam area results. The seam runs in the flag 22 and is accordingly loaded to train, when forces occur, which are the two container parts 20 and 21 strive to separate. Although the two container parts 20 and 21 lie flat against one another in the area of the lug 22, they do not overlap.

5 shows an overlapping designed seam of a proposed large container 1, which is designed as a weld, so that two container parts 20 and 21 are not sewn together, but are welded. Both container parts 20 and 21 are parallel to each other, wherein the surface of one container part 20 and 21, the surface of the other container part 21 and 20 continues, so that here the two container parts 20 and 21 overlap each other. The seam is sheared when forces occur which tend to separate the two container parts 20 and 21, and can accordingly absorb high loads.

FIG. 6 shows such an overlapping seam as basically illustrated in FIG. 5 in the transition region from the bottom 4 to a side wall 2 of the large container 1. Alternatively, to fold the side wall 2 as in the illustrated embodiment and to apply to the bottom 4, it may be provided to fold the bottom 4 and to apply to the side wall 2. And alternatively, to guide the floor 4 below the side wall 2 as in the illustrated embodiment, it may be provided to guide the side wall 2 below the floor 4.

Claims

Expectations:

Flexible large container (1) for holding filling material, which is formed from several interconnected sections,

whereby the large container (1) has several walls

(2) and floor (4) has designated areas,

which enclose a usable space (6) that accommodates the filling material,

and the large container (1) is provided with carrying loops (15) which enable the filled large container (1) to be lifted,

characterized,

that the large container (1) has a lid (3) and the sections surrounding the usable space (6) are welded together,

and that the sections extend beyond the dimensions of the usable space (6),

in such a way that a hem (5) is created on the upper circumferential edge of the usable space (6), which protrudes beyond the usable space (6),

and that the carrying loops (15) are attached to the hem (5),

such that the usable space (6) is free of seams.

Large container according to claim 1,

characterized,

that a carrying loop (15) is designed as a section of a belt (14),

wherein the strap (14) runs along the hem (5), runs approximately Ω-shaped in the area of the carrying loop (15), and is attached to the hem (5) outside the carrying loop (15).

3. Large container according to claim 1,

characterized, that a strap (14) runs along the hem (5) and is attached to the hem (5),

and a carrying loop (15) is attached to the strap (14) as a separate element.

Large container according to claim 3,

characterized,

that a carrying loop (15) runs approximately U-shaped at one end and surrounds the belt (14), which rests on both sides,

wherein a seam (16), which fixes the approximately U-shaped end of the carrying loop (15) to the belt (14), through the two sections of the carrying loop (15) adjacent to the belt (14) and through the section of the belt located between them (14) runs.

Large container according to one of the preceding claims, characterized in

that the sections of the large container (1) contain polyethylene.

Large container according to claim 5,

characterized,

that a section has a fabric in which fabric fibers run in two intersecting directions, at least the fabric fibers in one direction containing polyethylene.

Large container according to claim 6,

characterized,

that the fabric fibers are designed as ribbons.

Large container according to one of claims 5 to 7,

characterized,

that the sections contain a polyethylene called HDPE or high-density polyethylene. Large container according to claim 5,

characterized,

that a section has a fabric which is provided on the inside, towards the usable space (6), with a liner designed as a film, which is laminated to the fabric and contains polyethylene.

Large container according to one of the preceding claims, characterized in

that the large container (1) is designed to be dimensionally stable, with two adjacent walls (2) of the large container (1) forming a corner area in which they are connected by means of an oblique flexible strut extending between these two walls (2),

wherein the strut has passage openings for the filling material.

Large container according to one of the preceding claims, characterized in

that the hem (5) protrudes upwards beyond the usable space (6),

and is created by the walls (2), which extend higher than the weld seam (8) by means of which the cover (3) is connected to the walls (2).

Large container according to one of the preceding claims, characterized in

that a pipe socket (9) is provided as a filler neck in the cover (3),

and / or a pipe socket (1 1 ) is provided in the floor (4) as a drain connection,

wherein the respective pipe socket (9, 1 1) is designed as a separate section of the large container (1), which consists of the same material as the lid (3) or base (4) to which the pipe socket (9, 1 1) is welded is. Large container according to one of the preceding claims,

characterized,

that the sections enclosing the usable space (6) are arranged to overlap one another where they are welded together.

Large container according to one of the preceding claims, characterized in

that an intermediate layer containing polyethylene is arranged between the sections enclosing the usable space (6) where they are welded together.

Large container according to one of the preceding claims, characterized in

that the fabric in the hem (5) is reinforced where points are provided for connecting the carrying loops (15).

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