EP3153432B1 - Storage device for packaging loose materials and assembly comprising a plurality thereof - Google Patents

Description

The invention relates to a flexible storage device for the packaging of bulk solids. The field of the invention is that of large containers intended for the packaging of large quantities of particulate solids, also known as GRVS ( Flexible Bulk Container ) or FIBC ( Flexible Intermediate Bulk Container ) bags. . These storage devices have been known for many years and used for the protection, storage and transport of bulk materials.

These containers are conventionally made of polymer fiber webs (for example PP, HDPE, LLDPE), possibly sealed. The capacity of these containers is generally between 0.2 and 2 m ³ . The large size and mass of containers, once filled, make their handling difficult, even in some cases dangerous. In order to optimize the storage capacities, the flexible container often has rectangular bottom and side walls, thus forming a substantially parallelepipedal storage volume. When the devices are juxtaposed, such a parallelepipedal volume allows optimal filling of the available storage area.

In a way that is noticeable to those skilled in the art, an inherent advantage of such storage devices, advantageously flexible, is that they can, when not used, be stored in a position of less space, substantially folded flat, or even often in the compressed state.

Thus, the manufacturers of such large flexible bulk containers often deliver these storage devices in the form of a set in the compressed state, comprising a plurality of flexible storage devices, in their position substantially folded flat, stacked the on each other, and held against each other in the compressed state by links surrounding the stack of said set.

In order to minimize the bulk during transport, it is thus known to subject the stack to the action of a packaging machine which comprises a press, exerting on the devices a force, typically of several tons. A system of belting of the machine allows, together with the action of the press, the tightening of several links intended to surround the stack and to keep the devices against each other. These links ensure the maintenance of the stack in the compressed state, once the press deviates.

Given the storage capacities, these flexible storage devices are not handled by force of man, but lifted by means of a lifting system, typically hydraulic / motorized. To this end, the flexible storage devices of the state of the art are provided with suspension loops, conventionally in the form of flexible straps, typically four in number, and stitched at the four corners of the flexible container. These suspension loops are intended to be hung together by the lifting system to allow its handling.

According to the findings of the inventor, the storage devices of the state of the art require human intervention to hang the suspension loops to the lifting system, then to unhook the suspension loops of the lifting system.

The loops being small, they can not be joined without the use of a specific lifting equipment, which can include four chains, and four carabiners to be hooked respectively to the four loops of the bag suspension GRVS.

As an alternative to this chain and carabiner equipment, the suspension loops of the bag can be combined by using a lifting beam, intermediate, often in the form of a welded machine, and which comprises four hooks, separate and distant, lower, for the respective clashes of the four loops of the bag GRVS.

During the hooking operation, the operator grasps the suspension loops, lifts them by hooking them successively to the different attachment zones of the equipment. Conversely, and during stall operations, the operator must intervene to successively unhook the suspension loops.

According to the findings of the inventor, these operations are dangerous, especially when they take place at a high point, such as for example on a storage shelf, or on the upper surface of the loading of the bucket of a truck , and from which the operator is likely to fall. The document AU 2009 100 871 discloses a storage device according to the preamble of claim 1. The object of the present invention is to overcome the aforementioned drawbacks by proposing a storage device for bulk, flexible, which greatly simplifies the container handling operations, allowing to avoid the presence of an operator during the operations of hanging or unhooking of the suspension loops.

Another object of the present invention is to propose, at least according to one embodiment, such a storage device which can be grasped and quickly removed, without human intervention, by a single hook lifting system.

Another object of the present invention is to provide such a flexible bulk storage device which, at least according to one embodiment, remains compatible with the press packaging devices, and can thus be strongly compressed in the form a stack of devices folded flat, without risk of tampering with said storage device.

Another object of the present invention is to provide such a storage device, which, at least according to one embodiment, maximizes the capacity of the storage surfaces.

Another object of the present invention is to provide such a flexible storage device, which, at least according to one embodiment, is easy to recycle.

Other goals and advantages will become apparent from the following description which is given for information only and which is not intended to limit it.

The invention relates to a storage device for the packaging of bulk materials according to the subject of claim 1.

• le dispositif comprend un moyen de liaison, souple, et destiné à relier, de manière amovible, lesdites boucles de suspension en les regroupant à leur partie supérieure, en une même zone d'accrochage, ledit moyen de liaison pouvant passer d'une position de fermeture reliant lesdites boucles de suspension entre elles, vers une position d'ouverture pour laquelle les boucles de suspension sont déliées ;
• la raideur des boucles de suspension est telle que le maintien des boucles de suspension n'est assuré qu'une fois lesdites boucles de suspension reliées à leur partie supérieure par ledit moyen de liaison ;
• les boucles de suspension comprennent chacune une sangle, souple, fixées à ses deux extrémités au récipient, et présentant une section de longueur libre, intermédiaire, en saillie au-dessus du récipient, ainsi qu'un élément élastique, longiligne, en matériau semi-rigide, s'étendant en longueur le long de la sangle et de raideur telle que ledit élément élastique coopère avec ladite sangle afin d'assurer le maintien de la boucle de suspension en position autoportante ;
• la matière de la sangle forme un repli, recevant en insert ledit élément élastique ;
• ledit élément élastique s'étend en longueur, non seulement le long de la section de longueur libre de ladite sangle, intermédiaire, mais également le long des deux extrémités de la sangle fixées aux parois latérales du récipient ;
• ledit élément élastique, semi rigide, est un élément tubulaire.

Notably and according to the invention:

• the device comprises a connecting means, flexible, and intended to removably connect said suspension loops by grouping them at their upper part, in a same attachment zone, said connecting means can pass from a position of closing connecting said suspension loops together, to an open position for which the suspension loops are loosened;
• the stiffness of the suspension loops is such that the holding of the suspension loops is ensured only once said suspension loops connected to their upper part by said connecting means;
• the suspension loops each comprise a strap, flexible, fixed at both ends to the container, and having a section of free length, intermediate, projecting above the container, and an elastic member, elongate, semi-material rigid, extending in length along the strap and stiffness such that said elastic member cooperates with said strap to ensure the maintenance of the suspension loop in the self-supporting position;
• the material of the strap forms a fold, receiving in insert said elastic element;
• said elastic member extends in length, not only along the free length section of said strap, intermediate, but also along both ends of the strap attached to the side walls of the container;
• said resilient, semi-rigid member is a tubular member.

• ledit moyen de liaison est solidaire de l'une des boucles de suspension dans ladite position d'ouverture ;
• le moyen de liaison, souple, comprend un lien qui est noué autour desdites boucles dans ladite position de fermeture et délié dans la position d'ouverture ;
• ledit moyen de liaison comprend un système d'ouverture/fermeture du type boucles/crochets, tel que par exemple Velcro® pour passer de ladite position d'ouverture vers la position de fermeture, ou inversement.
• ladite portion de longueur du récipient, supérieure sur laquelle s'étend ledit élément longiligne représente entre ¼ et ½ de la hauteur du récipient, tel que 1/3 de la hauteur du récipient ;
• l'épaisseur de paroi dudit élément tubulaire est comprise entre 1,5 mm et 3 mm, telle que 2 mm ;
• les boucles de suspension sont au nombre de deux ;
• la paroi de fond et les parois latérales sont sensiblement rectangulaires, ledit volume de stockage étant de forme parallélépipédique ;
• les boucles de suspension comprennent deux boucles de suspension qui, chacune, relie par ses extrémités deux angles consécutifs du volume de stockage parallélépipédique, au niveau des arêtes verticales dudit récipient parallélépipédique ;
• la contenance du récipient est comprise entre 0,2 m³ et 2 m³.
• le récipient souple formant la paroi de fond et les parois latérales, ainsi que lesdites boucles de suspension, y compris le cas échéant lesdites sangles et lesdits éléments élastiques, sont dans un même matériau plastique.

According to optional features of the invention, taken alone or in combination:

• said connecting means is integral with one of the suspension loops in said open position;
• the flexible connecting means comprises a link which is tied around said loops in said closed position and untied in the open position;
• said connecting means comprises an opening / closing system of the type loops / hooks, such as for example Velcro® to move from said open position to the closed position, or vice versa.
• said length portion of the upper container on which said elongate member extends is between ¼ and ½ of the height of the container, such as 1/3 of the height of the container;
• the wall thickness of said tubular element is between 1.5 mm and 3 mm, such as 2 mm;
• the suspension loops are two in number;
• the bottom wall and the side walls are substantially rectangular, said storage volume being of parallelepiped shape;
• the suspension loops comprise two suspension loops, each of which connects at its ends two consecutive angles of the parallelepiped storage volume at the vertical edges of said parallelepiped container;
• the capacity of the container is between 0.2 m ³ and 2 m ³ .
• the flexible container forming the bottom wall and the side walls, as well as said suspension loops, including where appropriate said straps and said elastic members, are in the same plastic material.

The invention further relates to an assembly in the compressed state, comprising a plurality of flexible storage devices according to the invention, in their position substantially folded flat, stacked on each other, and held against each other at the compressed state by links surrounding the stack of said set.

• La figure 1 est une vue d'un dispositif de stockage pour vrac, souple, conforme à l'invention selon un mode de réalisation, comprenant un volume de stockage parallélépipédique, et deux boucles de suspension en positions déliées.
• La figure 2 est une vue de détail de la coupe II-II telle qu'illustrée à la figure 1.
• La figure 3 est une vue du dispositif de la figure 1, les deux boucles de suspension étant regroupées de manière amovible, à leur partie supérieure, en une même zone d'accrochage, par un moyen de liaison.
• La figure 4 est une vue de côté du dispositif de stockage de la figure 1, illustrant en transparence, l'élément élastique, sous forme de pointillés, ledit élément élastique s'étendant non seulement le long de la section de longueur intermédiaire en saillie de la sangle de la boucle de suspension, mais également, sensiblement à la verticale, le long des extrémités des sangles fixées au récipient, et sur une portion de longueur supérieure du récipient souple.
• La figure 5 est une vue d'un dispositif de stockage souple, conforme à l'invention selon un second mode de réalisation, le volume de stockage fermé à sa partie supérieure par une jupe dont l'ouverture est maintenue fermée par un lien.
• La figure 6 est une vue de détail d'un élément élastique de section tubulaire d'un dispositif de stockage conforme à l'invention, selon un mode de réalisation.
• La figure 7 est une vue de la section creuse dudit élément élastique illustré à la figure 6.
• La figure 8 est une vue de trois toiles permettant la conception des parois de fond et latérales rectangulaires d'un récipient à volume de stockage sensiblement parallélépipédique.
• La figure 9 est une vue d'un empilement de dispositifs de stockage, souple, plié à plat, soumis à l'action d'un dispositif d'emballage dont la presse comprime l'empilement, et conjointement, le dispositif d'emballage procède au serrage de différents liens maintenant ledit empilement à l'état compressé.
• La figure 10 est une vue de détail, partielle, d'un dispositif conforme à l'invention selon un mode de réalisation et illustrant plus particulièrement un moyen de liaison à deux éléments d'ouverture/fermeture indépendants.

The invention will be better understood on reading the following description accompanied by the appended drawings in which:

• The figure 1 is a view of a storage device for bulk, flexible, according to the invention according to one embodiment, comprising a parallelepiped storage volume, and two suspension loops in untied positions.
• The figure 2 is a detail view of section II-II as illustrated in figure 1 .
• The figure 3 is a view of the device of the figure 1 , the two suspension loops being removably grouped at their upper part, in the same attachment zone, by a connecting means.
• The figure 4 is a side view of the storage device of the figure 1 showing, in transparency, the elastic element, in the form of a dashed line, said elastic element extending not only along the intermediate length section protruding from the strap of the suspension loop, but also, substantially vertically, along the ends of the straps attached to the container, and on a longer length portion of the flexible container.
• The figure 5 is a view of a flexible storage device according to the invention according to a second embodiment, the storage volume closed at its upper part by a skirt whose opening is kept closed by a link.
• The figure 6 is a detail view of a tubular section elastic element of a storage device according to the invention, according to one embodiment.
• The figure 7 is a view of the hollow section of said elastic member shown in FIG. figure 6 .
• The figure 8 is a view of three canvases for the design of rectangular bottom and side walls of a container with substantially parallelepiped storage volume.
• The figure 9 is a view of a stack of storage devices, flexible, folded flat, subjected to the action of a packaging device whose press compresses the stack, and jointly, the packaging device proceeds to the tightening of different links maintaining said stack in the compressed state.
• The figure 10 is a detail view, partial, of a device according to the invention according to one embodiment and more particularly illustrating a connection means with two independent opening / closing elements.

• Un récipient souple 2, défini au moins par une paroi de fond 20 et des parois latérales 21, 22, 23, 24, formant un volume de stockage de matière,
• Des boucles de suspension 3, 4, souples, en partie supérieure du récipient destinées au levage.

Also the invention relates to a storage device 1, for the packaging of bulk materials, comprising:

• A flexible container 2, defined at least by a bottom wall 20 and side walls 21, 22, 23, 24, forming a material storage volume,
• Suspension loops 3, 4, flexible, in the upper part of the container for lifting.

Said storage device is flexible, and can in particular go from a storage position P0, substantially folded flat to a use position P1, substantially in volume.

The walls of the flexible container 2, in particular the bottom wall 20 and side walls 21, 22, 23, 24 may be made of a fabric of polymer fibers, in particular a raw, rolled or even coated fabric (for example PP, HDPE , LLDPE). The container can also receive an inner liner insert, in a polymer film, and coming to cover the side walls of the container, or even the bottom wall, and to improve the sealing of the container.

According to the invention, said suspension loops 3, 4 have a stiffness such that the suspension loops are self-supporting, in the use position P1, substantially in volume of the storage device. Said suspension loops 3.4 then project above the flexible container, advantageously without external assistance, to ensure their maintenance in this position where they are likely to be hooked. Said loops, taken as a whole (when connected to their upper part), are self-supporting in that they project above the flexible container, and are likely to be hooked or unhooked by a lifting system, advantageously without have to be relieved or maintained by an operator.

In particular, said suspension loops have sufficient sizes to be joined at a point passing through the axis of gravity of the storage device. It is thus easier to join the loops.

Such flexible storage devices may, at least according to one embodiment, be compatible with a packaging machine known as such, and as described above, which subjects the press to a stack of flexible storage devices 1, folded flat, and exerts on the stack a force of the order of several tons, to create a stack of storage device, stacked on top of each other, and held against each other; others in the compressed state by links 101 surrounding the stack. In such a case special attention is paid by the inventor for said suspension loops, self-supporting, significant stiffness, are compatible with this compression step, without deterioration thereof.

According to a first embodiment, said suspension loops may be stiff such that, taken individually, each of the suspension loops is held alone, and forms an upward projecting loop, capable of being hooked by a lifting system.

According to a second embodiment, corresponding to the invention, the stiffness of the suspension loops 3, 4 is such that the holding of suspension loops projecting above the flexible container is ensured only once said loops of suspension, connected to their upper part by a connecting means 5. Such an embodiment requires a lower stiffness of the suspension loops to ensure their maintenance (that the first embodiment), in that said suspension loops support against each other, at their upper part.

According to the invention, said storage device comprises said connecting means 5, possibly flexible, intended to removably connect said suspension loops 3, 4 by grouping them at their upper part, into a same fastening zone Za . These suspension loops 3, 4 can thus be hung together in this zone Za, by the same member, and for example a hook of a lifting system, and as represented by way of example in FIG. figure 3 .

The connecting means 5 can thus pass from a closed position Pf connecting said suspension loops to one another to an open position Po for which the suspension loops are loosened.

According to one embodiment, said connecting means 5 is integral with one of the suspension loops 3, 4 in said opening position Po, thus avoiding losses of the connecting means in said opening position Po. said connecting means 5 is preferably at the highest point of the suspension loop, and / or at a middle portion of said suspension loop.

According to one embodiment, the connecting means 5, flexible, comprises a link, for example textile, in particular in the same material as the container, which is tied around said suspension loops in said closed position, and loosened in the opening position.

Alternatively, said connecting means may comprise an opening / closing system for example of the type loops / hooks also called self-gripping strip, such as for example Velcro® to move from said open position to the closed position, or Conversely. Any other opening / closing system such as clipping means, stapling, can be envisaged. Their design should, however, preferably be compatible with the implementation of a compression step of the devices, and as described above.

According to one embodiment, the connecting means 5 comprises two independent opening / closing elements 51, 52 (for example two links or two opening systems as previously described), which enable the suspension loops to be joined together. 5.7 at two points distant along the suspension loops. Such an embodiment makes it possible to join, against each other, the length sections of the suspension loops, located between the elements 51, 52: the fastening zone Za is then defined by the length sections of the loops 3,4 arranged between these two elements 51, 52. Such an embodiment is illustrated in FIG. figure 10 when the device comprises two suspension loops 3,4.

According to the invention illustrated in the figures, the suspension loops 3,4 each comprise a flexible strap 6 (not self-supporting in itself) fixed at its two ends to the container 2. This strap 6 has a section of free length 60 intermediate, projecting, above the container 2. Each suspension loop 3,4 further comprises an elastic member 7, elongate, in semi-rigid material. This elastic element 7 extends in length along the strap 6 and is stiff such that said elastic member cooperates with said strap 6 to maintain the suspension loop 3, 4 in the self-supporting position. The strap 6 may be in a material such as polymeric fiber.

Said elastic element 7 is provided as an insert in the strap 6. Thus and as illustrated in FIG. figure 2 , the material of the strap 6 forms a fold, receiving insert said elastic member 7, the two edges of the fold being secured to one another, for example by sewing.

According to the invention, said elastic member 7 extends in length, not only along the free length section 60 of said strap, projecting, but also along the ends of the strap 6 attached to the side walls 21, 22 , 23, 24 of the container 2.

According to the invention, said elastic member 7 extends along the ends of the strap 6 fixed to the container, preferably in the vertical direction, and only on a portion of the upper LS length of the container, as illustrated by way of non-limiting example. limiting to figure 4 .

Said length portion of the container LS, on which said upper elastic element extends, can represent between ¼ and ½ of the height H of the container such as 1/3 of the height of the container.

According to the inventor, this is a compromise between, on the one hand, a first objective aimed at obtaining a certain stiffness of the suspension loop in order to obtain the maintenance of the suspension loops by protruding in their position where they are likely to be hooked, preferably without external assistance, and secondly, conversely, a second objective to maintain a storage device easily foldable and compressible, in a folded position flat these two objectives are in themselves contradictory.

Said elastic element 7, semi-rigid, is an elongate elastic element, which may be plastic. Said elastic element is a tubular element, for example cylindrical. The advantage of such a tubular element, in comparison with a solid element, is to impart stiffness, by limiting the linear mass of said elongate element.

This low linear mass can allow the flexible storage device to be self-supporting, namely that not only said suspension loops 3 and 7 are self-supporting in said position of use P1 when linked together at their upper part, but also the container (Then empty), and in particular that said elastic element 7 extends only on the upper length portion LS, said lower portion LI of the remaining container, then preferably free of such elastic reinforcement.

The other advantage of an elastic element 7 in tubular form is that it can crash (without deteriorating) and therefore compress, when the stack of flexible storage devices folded flat is subjected to the device press packaging, which can exert on the storage devices and their tubular elastic elements 7, a force of several tons. During this compression step, the air escapes from the tubular elastic element by its open ends.

The wall thickness of said tubular element may be between 1.5 mm and 3 mm, such as 2 mm. For example, said elastic element 7 is a cylindrical section element with an internal diameter of 3 mm and an external diameter of 5 mm, preferably made of plastic.

According to an embodiment optimizing the filling of the storage surfaces, the bottom wall 20 and the side walls 21, 22, 23, 24 can be substantially rectangular, said storage volume being of substantially parallelepiped shape, in said use position in volume of said container. For example, the container can be obtained by assembling five webs, constituting respectively the bottom wall and the four side walls of the container, sewn edge to edge. According to this embodiment, four sewing lines, substantially horizontal, extend along the four sides of the bottom wall and respectively join the bottom wall, on the one hand, and the four side walls, on the other hand. Four substantially vertical seam lines join the side walls in pairs at the four corners A1, A2, A3, A4 of the container.

Alternatively, the parallelepiped-shaped container can be obtained by joining three webs T1, T2, T3, including a first fabric T1 forming the bottom wall 20 at its central part, and two opposite side walls 21 and 23, its ends, and two webs T2, T3, respectively forming the other two opposite side walls 22 and 24 of the container. According to this embodiment illustrated in figure 8 two substantially horizontal seam lines extend along two sides of first fabric T1 and join the bottom wall and the side walls marked 22 and 24. Four substantially vertical seam lines join the side walls 21, 22 , 23, 24 two by two, at the four corners A1, A2, A3, A4 of the container.

According to one embodiment, said suspension loops 3,4 for lifting, self-supporting, in the upper part of the container are two in number. In the case of a parallelepiped-shaped container, as described above, each of the suspension loops 3, 4 connects at its two ends two consecutive angles A1, A2 (or A3, A4) of the parallelepipedal storage volume, level of the vertical edges of the container.

In particular, and when the suspension loops 3, 4 each comprise a strap 6, flexible, fastened at both ends to the container, as well as an elastic element 7, elongated, said strap 6 is fixed by its two ends respectively along the vertical edges of two angles A1 and A2 (or A3 and A4) of the container 2, and preferably over most of the height of the container, in particular over the entire height of the container, for example by sewing between the strap 6 and the canvas of the container 2.

Thus, and in the embodiment of the figures, the strap 6 of the suspension loop 3 is fixed by its two ends, respectively at the angles A1 and A2 of the container 2, and preferably over the entire height of the edges, and the strap 6 of the other suspension loop 4 is fixed by its two ends to the angles A3 and A4 and preferably over the entire height of the edges.

In order to facilitate recycling, the flexible container 2 forming the bottom wall 20 and the side walls 21, 22, 23, 24, as well as the said suspension loops 3, 4, including, where appropriate, the said straps and the said elastic elements, even the connecting means 5 are in the same plastic material.

According to one embodiment, illustrated in a non-limiting manner to the figure 5 , the container 2 may comprise a tubular skirt 8 whose outer perimeter is fixed on the upper contour of the side walls, and for closing the upper opening of the container by the installation of a closure link 9.

According to one embodiment, illustrated in a non-limiting manner to the figure 5 , the container 2 may comprise other loops, namely including handling straps, fixed at the bottom of the container. These handling straps 10, 11 facilitate the tilting of the storage device, filled and placed on the ground, for unloading.

The invention also relates to a set 100 in the compressed state, comprising a plurality of flexible storage devices 1 according to the invention, substantially folded flat, stacked on top of one another, and held against each other at the same time. state compressed by links 101 surrounding the stack of said assembly.

Naturally other embodiments could have been envisaged by the skilled person without departing from the scope of the invention as defined by the claims below.

NOMENCLATURE

• 1. Storage device,
• 2. Flexible container,
• 3.4. Suspension loops,
• 5. Liaison means,
• 6. Straps (Suspension Buckles 3,4)
• 7. Elastic elements (suspension loops 3,4),
• 8. Skirt,
• 9. Closure link (skirt 8),
• 10, 11. Handling straps
• 20. Bottom wall
• 21, 22, 23, 24. Lateral walls,
• 51.52. Opening / closing elements (5. Connection means),
• Za. Hanging area
• 60. Section of free length (strap 6),
• Together,
• 101. Tightening ties.
• P. Press packaging device,
• P0, P1. Positions, respectively flat and volume of the container,
• Po, Pf Positions respectively of opening and closing of the connecting means,
• LS. Portion of the upper length of the container on which said elastic element extends,
• LI. Portion of the container's bottom length,
• H. height of the container,
• A1, A2, A3, A4. Angles of the container at its vertical edges,
• T1, T2, T3. Canvas ( figure 8 ).

Claims (14)

1. Storage device (1), for the packaging of loose materials, comprising:

   - a flexible container (2), defined at least by a back wall (20) and lateral walls (21, 22, 23, 24), forming a volume for storing material,

   - flexible suspension loops (3, 4) in the upper portion of the container, intended for lifting,

   said storage device (1) being flexible being able to go from a storage position (P0), substantially folded flat, to a substantially three-dimensional use position (P1),
   said suspension loops (3, 4) have a stiffness such that the suspension loops are self-supporting, in said three-dimensional use position of the container, while protruding above the flexible container, the suspension loops (3, 4) each comprising a strap, (6) flexible, fastened at its two ends to the container, and having an intermediate free section of length (60) protruding above the container (2), as well as an elastic element (7), longilineal, made of a semi-rigid material, extending lengthwise along the strap (6) and having a stiffness such that said elastic element (7) cooperates with said strap (6) in order to ensure the retention of the suspension loop (3, 4) in a self-supporting position,
   and wherein said suspension loops (3, 4) have sizes sufficient to be brought together at a point passing through the axis of gravity of the storage device, the device comprises a connection means (5), flexible, connecting, said suspension loops (3, 4) by grouping them together at their upper portion, in the same attachment zone (Za), characterised in that:

   said flexible connection means (5), is intended to removably connect, said suspension loops (3, 4), said connection means (5) being able to go from a closing position (Pf) connecting said suspension loops together to an opening position (Po) for which the suspension loops are untied,

   and wherein the material of the strap (6) forms a fold, receiving, as an insert, said elastic element (7), said elastic element (7) being a tubular element extending lengthwise, not only along the free section of length (60) of said strap, which is intermediate, but also along the two ends of the strap (6) fastened to the lateral walls (21, 22, 23, 24) of the container (2), and only over an upper length portion (LS) of the container (2),

   and wherein the stiffness of the suspension loops is such that the retention of the suspension loops is only ensured once said suspension loops are connected at their upper portion by said connection means (5).
2. Device according to claim 1, wherein said connection means (5) is rigidly connected to one of the suspension loops (3, 4) in said opening position (Po).
3. Device according to claim 1 or 2, wherein the connection means (5), which is flexible, comprises a link that is tied around said loops in said closing position and untied in the opening position.
4. Device according to claim 1 or 2, wherein said connection means comprises a hook and loop opening/closing system, for example such as Velcro® in order to go from said opening position to the closing position or vice versa.
5. Device according to claim according to one of claims 1 to 4, wherein said length portion of the container (LS), upper on which said elastic element (7) extends represents between ¼ and ½ of the height (H) of the container, such as 1/3 of the height of the container.
6. Device according to one of claims 1 to 5, wherein the thickness of the wall of said tubular element is between 1.5mm and 3mm, such as 2mm.
7. Device according to one of claims 1 to 6, wherein there are two self-supporting suspension loops (3, 4).
8. Device according to one of claims 1 to 7, wherein the bottom wall (20) and the lateral walls (21, 22, 23, 24) are substantially rectangular, said storage volume having the shape of a parallelepiped.
9. Device according to claim 8, wherein the suspension loops (3, 4) comprise two suspension loops that, each connects, by its ends, two consecutive angles (A1, A2 or A3, A4) of the parallelepiped-shaped storage volume, at the vertical edges of said parallelepiped-shaped container.
10. Device according to one of claims 1 to 9, wherein the capacity of the container is between 0.2m³ and 2m³.
11. Device according to one of claims 1 to 10, wherein the flexible container (2) forming the bottom wall and the lateral walls, as well as said suspension loops (3, 4), including, if necessary, said straps (6) and said elastic elements (7), are made from the same plastic material.
12. Device according to one of claims 1 to 11, wherein the walls of the container are made from a fabric of polymer fibres.
13. Device according to one of claims 1 to 12, wherein the container (2) comprises a tubular skirt (8), the outer perimeter of which is fastened onto the upper contour of the lateral walls, and allowing the upper opening of the container to be closed by the placement of a tie (9).
14. Set (100) in the compressed state, comprising a plurality of flexible storage devices (1) according to one of claims 1 to 13, in their substantially folded flat position, stacked one on top of the other, and maintained against one another in the compressed state by ties (101) surrounding the stack of said set.

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