US20210269233A1 - Inner container made of plastic and transport and storage container for liquids having an inner container made of plastic - Google Patents
Inner container made of plastic and transport and storage container for liquids having an inner container made of plastic Download PDFInfo
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- US20210269233A1 US20210269233A1 US17/189,616 US202117189616A US2021269233A1 US 20210269233 A1 US20210269233 A1 US 20210269233A1 US 202117189616 A US202117189616 A US 202117189616A US 2021269233 A1 US2021269233 A1 US 2021269233A1
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- 239000007788 liquid Substances 0.000 title claims abstract description 8
- 238000003860 storage Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims description 12
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005352 clarification Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1656—Flexible intermediate bulk containers [FIBC] for liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
- B65D77/0446—Articles or materials enclosed in two or more containers disposed one within another the inner and outer containers being rigid or semi-rigid and the outer container being of polygonal cross-section not formed by folding or erecting one or more blanks
- B65D77/0453—Articles or materials enclosed in two or more containers disposed one within another the inner and outer containers being rigid or semi-rigid and the outer container being of polygonal cross-section not formed by folding or erecting one or more blanks the inner container having a polygonal cross-section
- B65D77/0466—Articles or materials enclosed in two or more containers disposed one within another the inner and outer containers being rigid or semi-rigid and the outer container being of polygonal cross-section not formed by folding or erecting one or more blanks the inner container having a polygonal cross-section the containers being mounted on a pallet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/18—Large containers flexible bellows-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/22—Large containers flexible specially adapted for transport
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
Definitions
- the present invention relates to an inner container made of plastic for transporting and storing liquids, the inner container having an outlet socket for connecting an outlet fitting on a front side, a bottom wall connecting two side walls, a rear wall and a front wall of the inner container and serving to support the inner container on a pallet floor of a transport pallet provided with an outer jacket for receiving the inner container, and a top wall located opposite the bottom wall and provided with a filling opening.
- the containers of the kind described above are used as a replaceable component of transport and storage containers serving to transport and store liquids and typically employed as what is known as circulation containers, which are filled repeatedly.
- Inner containers of this kind are produced by blow molding and typically have a capacity of approximately 1000 liters, transport and storage containers provided with the inner containers thus allowing correspondingly large amounts of liquid to be transported and stored, space-saving arrangement during transport and storage being possible owing to the fact that the inner containers are received in an outer jacket of the transport and storage pallet and are stackable as a result.
- the amount of space required for arranging or accommodating the known inner containers is basically independent of whether the inner containers are full or empty. This proves disadvantageous in particular if the inner container and the transport and storage pallet provided with the outer jacket are produced at different manufacturing sites and the transport and storage containers cannot be completed by “potting” the inner containers in the outer jacket until the components have been brought together, i.e., in particular until the empty inner containers have been transported.
- the large capacity and the accompanying voluminous design of the inner containers proves disadvantageous since the voluminous design of the inner containers results in a ratio between the transport volume and the transport weight that is unfavorable in terms of transport costs.
- the object of the present invention is to propose an inner container that makes low transport costs for the empty container possible without negative effects on the capacity.
- the side walls each have a horizontal corrugation, the horizontal corrugations being disposed in a shared central horizontal plane of the inner container.
- the positions of the corrugations in the side walls as per the invention define folding lines of the inner container which allow the inner container to fold to a defined base area defined by the bottom wall when external loads act on the container walls in such a manner that a point load is externally applied to the surface centers of the front wall and the rear wall and a linear load is externally applied along the horizontal corrugations of the side walls, causing the front wall and the rear wall to be moved toward each other and the side walls to be moved toward each other, a surface load being simultaneously exerted on the bottom wall and the top wall in such a manner that the bottom wall and the top wall move toward each other.
- the inner container is reduced in height by the folding process, the horizontal corrugations in the side walls causing the side walls to fold in a defined manner against the elastic restoring forces of the inner container and ensuring that the top wall and the bottom wall are disposed one on top of the other essentially congruently after folding.
- the compressed inner container When the inner container is compressed to its folded size, the compressed inner container can be secured in the folded configuration by means of belts and stacked with the bottom wall in the horizontal position or, if needed, disposed in a horizontal row of a plurality of folded inner containers with the bottom wall in the vertical position in order for the folded inner container to be stored or transported.
- the folded inner containers When folded inner containers and transport pallets provided with an outer jacket are transported together, the folded inner containers can advantageously also be disposed in a stack within the outer jacket on the transport pallet.
- the front wall additionally has two diagonal corrugations below a horizontal wall axis of the front wall, the horizontal wall axis being disposed in a shared horizontal plane with the horizontal corrugations, the diagonal corrugations extending between an outer container edge and the wall axis and approaching each other, a defined disposition of the outlet socket or of an outlet fitting already connected to the outlet socket is possible in the folded state of the inner container as a result of the folding process.
- the rear wall also has two diagonal corrugations below a horizontal wall axis of the rear wall, the horizontal wall axis being disposed in a shared horizontal plane with the horizontal corrugations, the diagonal corrugations extending between a lower container edge and the wall axis and approaching each other, enabling identical folding of the front wall and the rear wall.
- front wall and the rear wall each have two diagonal corrugations above the wall axes of the front wall and the rear wall, the wall axes being disposed in a shared horizontal plane with the horizontal corrugations, the diagonal corrugations extending from the upper container edge to the horizontal wall axis and approaching each other.
- the inner container can be folded with particularly low folding forces.
- each two diagonal corrugations coming from a shared container edge form a pair of corrugations and have longitudinal axes forming an isosceles triangle with the container edge, such that, in cooperation with the horizontal corrugations of the side walls, the wall folds formed during folding are located in a shared horizontal plane between the bottom wall and the top wall of the inner container.
- the folding process can be carried out with as little folding load as possible.
- the diagonal corrugations of each pair of corrugations have longitudinal axes that intersect with the horizontal wall axis in a shared horizontal intersection, enabling further reduction of the folding load.
- pairs of corrugations disposed on the front wall and the rear wall have a distance X between the horizontal intersections of their longitudinal axes with the horizontal wall axis, in particular the distance between the side wall folds of the folded inner container is set accordingly.
- the distal corrugation ends of the diagonal corrugations extend into the container corners, making a particularly small height of the inner container folded to the folded size possible.
- the diagonal corrugations have a corrugation bottom continuously rising toward a wall surface at their proximal corrugations ends, the diagonal corrugations continuously flatten out at the corrugation ends, which means that there is no reinforcement counteracting the folding at the end of the folding line formed by the diagonal corrugation.
- the corrugation ends of the horizontal corrugations extend into the container edges, the folded size in the plane of the bottom wall and of the top wall thus being adjusted to the planar size of the bottom wall or of the top wall.
- the horizontal corrugations have a concave corrugation bottom which has an enlarged profile radius for forming corrugation widenings at the corrugation ends, which means that the formation of kinks, i.e., plastic deformation, is avoided in the area of the container edges where multiple folds meet during the folding process.
- the corrugation widenings have at least a radial corrugation running in the corrugation bottom, a reinforcement thus being created in the area of the vulnerable container edges. If, moreover, at least a horizontal corrugation is formed in the front wall and in the rear wall adjacent to the corrugation widenings, the defined formation of the fold in the area of the front wall and the rear wall can be supported additionally.
- the folding of the inner container takes place in the following way: a point load is externally applied to the surface centers of the front wall and the rear wall and a linear load is externally applied along the horizontal corrugations of the side walls in such a manner that the front wall and the rear wall are moved toward each other and the side walls are moved toward each other, a surface load being simultaneously exerted on the bottom wall and the top wall in such a manner that the bottom wall and the top wall move toward each other.
- FIG. 1 shows a transport and storage container for liquids with an inner container made of plastic inserted into an outer jacket of a transport pallet;
- FIG. 2 is an isolated illustration of the inner container illustrated in FIG. 1 ;
- FIG. 3 shows the inner container of FIG. 2 in a folded state
- FIG. 4 is a schematic illustration of the inner container for clarifying the folding process
- FIG. 5 is a schematic illustration of the inner container with diagonal corrugations disposed on a front wall and a horizontal corrugation disposed on a side wall;
- FIG. 6 is an isometric illustration of an embodiment of the inner container
- FIG. 7 is a front view of the inner container illustrated in FIG. 6 ;
- FIG. 8 is a side view of the inner container illustrated in FIG. 6 .
- FIG. 1 shows a transport and storage pallet 10 having, as essential components, a transport pallet 11 on which an outer jacket 14 is disposed, outer jacket 14 being realized as a cage having vertical bars 12 and horizontal bars 13 .
- An inner container 15 made of plastic is disposed on transport pallet 11 within outer jacket 14 , inner container 15 having an outlet socket 18 provided with an outlet fitting 17 in a front wall 16 on a front side, as shown in FIG. 2 in particular.
- Outlet socket 18 is located in a lower wall portion 19 of front wall 16 in an area of transition to a bottom wall 20 of inner container 15 , bottom wall 20 of inner container 15 being disposed on a pallet floor 21 of transport pallet 11 .
- Bottom wall 20 connects front wall 16 to a rear wall 22 , which is formed on the rear side of inner container 15 , and two opposing side walls 23 and 24 .
- a top wall 25 provided with a filling opening 26 is formed opposite bottom wall 20 .
- traverses 27 connected to an upper circumferential edge 28 of outer jacket 14 extend above top wall 25 .
- FIG. 3 shows inner container 15 in the folded state, in which inner container 15 has a defined folded configuration 29 having wall folds 30 which are formed in side walls 23 and 24 and which extend into the drawing plane parallel to container bottom 20 in the illustration of inner container 15 according to FIG. 3 .
- inner container 15 has container edge folds 31 and 32 which extend from an upper container corner 33 to side wall fold 30 and from a lower container corner 34 to side wall fold 30 and which are formed in a front plane of inner container 15 .
- inner container 15 when in the folded state, inner container 15 has inner folds 35 and 36 which extend from an upper container corner 33 into a fold space 37 and from a lower container corner 34 into a fold space 38 .
- Fold spaces 37 and 38 are formed between an edge fold 40 formed on an upper container edge 39 of inner container 15 and adjacent container edge fold 31 and between an edge fold 42 formed on a lower container edge 41 of inner container 15 and adjacent container edge fold 32 .
- inner container 15 illustrated in FIG. 2 has diagonal corrugations 43 , 44 , 45 and 46 in its front wall 16 and its rear wall 22 and horizontal corrugations 47 and 48 in its side walls 23 and 24 , respectively, horizontal corrugations 47 and 48 being located in a central horizontal plane of inner container 15 .
- diagonal corrugations 43 , 44 , 45 and 46 are illustrated as surface diagonals in the schematic illustration of FIG. 4 .
- point loads P, linear loads L and surface loads F externally act on inner container 15 as illustrated in FIG. 4 , point loads P acting in opposite directions being exerted on central surface portions 49 of front wall 16 and rear wall 22 , linear loads L acting in opposite directions being exerted on side walls 23 and 24 along horizontal corrugations 47 and 48 and surface loads F acting in opposite directions being exerted on bottom wall 20 and top wall 25 .
- Diagonal corrugations 43 to 46 and horizontal corrugations 47 to 48 define folding lines when external loads act on inner container 15 as illustrated in FIG. 4 , such that front wall 16 and rear wall 22 are elastically deformed inward along diagonal corrugations 43 to 46 and inner folds 35 and 36 illustrated in FIG. 3 form along diagonal corrugations 43 to 46 and side walls folds 30 illustrated in FIG. 3 form along horizontal corrugations 47 and 48 . Furthermore, vertically running lateral container edges 50 and 51 of non-deformed inner container 15 ( FIG. 2 ) are turned into container edge folds 31 and 32 .
- FIG. 5 shows another schematic illustration of diagonal corrugations 43 , 44 , 45 and 46 in a disposition identical to FIG. 2 , in which diagonal corrugations 43 and 44 extend between an upper container edge 54 and horizontal wall axis 52 and diagonal corrugations 45 and 46 extend between a lower container edge 55 and horizontal wall axis 52 .
- Diagonal corrugations 43 and 56 and diagonal corrugations 44 and 45 together form pairs of corrugations 57 and 58 which, like pairs of corrugations 59 and 60 formed by diagonal corrugations 43 and 46 and diagonal corrugations 44 and 45 , respectively, and illustrated in FIG. 4 , together each form an isosceles triangle with lateral container edges 50 and 51 , the diagonal corrugations each being disposed at an angle of 45° to container edges 50 and 51 .
- diagonal corrugations 43 to 46 illustrated in FIG. 4 whose disposition coincides with the surface diagonals and whose longitudinal axes meet in a shared horizontal intersection M coinciding with the surface center in the case of the illustration of FIG. 4
- the longitudinal axes of diagonal corrugations 43 and 46 and diagonal corrugations 44 and 45 which form pairs of corrugations 57 and 58 in FIG. 5 , intersect in horizontal intersections S 1 and S 2 on wall axis 52 , intersections S 1 and S 2 having distance X from each other.
- Distance X prevents side wall folds 30 coming from container edges 50 and 51 from meeting when the folding process is carried out and plastic deformation from occurring in central surface portion 49 .
- corrugation ends 61 of diagonal corrugations 43 to 46 extend into container edges 50 and 51 , respectively, more specifically into upper container corners 33 and lower container corners 34 , respectively.
- diagonal corrugations 43 to 46 have corrugation bottoms 64 continuously rising toward a wall surface 63 of front wall 16 and rear wall 22 , respectively.
- Corrugation ends 65 on both sides of horizontal corrugations 47 and 48 extend into container edges 50 and 51 , horizontal corrugations 47 and 48 , like diagonal corrugations 43 and 46 , having a concave corrugation bottom 64 which has an enlarged profile radius 67 for forming corrugation widenings 66 on corrugation ends 65 .
- corrugation widenings 66 of the embodiment example at hand are provided with a plurality of parallel radial corrugations 68 formed in corrugation bottom 64 and formed closely together across the entire length of corrugation bottom 64 within corrugation widening 66 .
- front wall 16 like opposite rear wall 22 (not shown), has a plurality of horizontal corrugations 69 adjacent to corrugation widenings 66 of horizontal corrugations 47 and 48 , horizontal corrugations 69 extending along horizontal wall axis 52 in wall portion 70 of front wall 16 and rear wall 22 limited by pair of corrugations 57 formed by diagonal corrugations 44 and 45 and pair of corrugations 58 formed by diagonal corrugations 45 and 46 , respectively.
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Abstract
The invention relates to an inner container (15) made of plastic for transporting and storing liquids, the inner container (15) having an outlet socket (18) for connecting an outlet fitting (17) on a front side, a bottom wall (20) connecting two side walls (23, 24), a rear wall (22) and a front wall (16) of the inner container (15) and serving to support the inner container (15) on a pallet floor (21) of a transport pallet (11) provided with an outer jacket (14) for receiving the inner container (15), and a top wall (25) located opposite the bottom wall (20) and provided with a filling opening, wherein the side walls (23, 24) each have a horizontal corrugation (47, 48), the horizontal corrugations (47, 48) being disposed in a shared central horizontal plane.
Description
- This application claims the benefit of German Patent Application No. 10 2020 105 525.0 filed on Mar. 2, 2020, the disclosure of which is incorporated herein by reference.
- The present invention relates to an inner container made of plastic for transporting and storing liquids, the inner container having an outlet socket for connecting an outlet fitting on a front side, a bottom wall connecting two side walls, a rear wall and a front wall of the inner container and serving to support the inner container on a pallet floor of a transport pallet provided with an outer jacket for receiving the inner container, and a top wall located opposite the bottom wall and provided with a filling opening.
- The containers of the kind described above are used as a replaceable component of transport and storage containers serving to transport and store liquids and typically employed as what is known as circulation containers, which are filled repeatedly.
- Inner containers of this kind are produced by blow molding and typically have a capacity of approximately 1000 liters, transport and storage containers provided with the inner containers thus allowing correspondingly large amounts of liquid to be transported and stored, space-saving arrangement during transport and storage being possible owing to the fact that the inner containers are received in an outer jacket of the transport and storage pallet and are stackable as a result.
- The amount of space required for arranging or accommodating the known inner containers is basically independent of whether the inner containers are full or empty. This proves disadvantageous in particular if the inner container and the transport and storage pallet provided with the outer jacket are produced at different manufacturing sites and the transport and storage containers cannot be completed by “potting” the inner containers in the outer jacket until the components have been brought together, i.e., in particular until the empty inner containers have been transported. In this context, the large capacity and the accompanying voluminous design of the inner containers proves disadvantageous since the voluminous design of the inner containers results in a ratio between the transport volume and the transport weight that is unfavorable in terms of transport costs.
- Hence, the object of the present invention is to propose an inner container that makes low transport costs for the empty container possible without negative effects on the capacity.
- According to the invention, the side walls each have a horizontal corrugation, the horizontal corrugations being disposed in a shared central horizontal plane of the inner container.
- The positions of the corrugations in the side walls as per the invention define folding lines of the inner container which allow the inner container to fold to a defined base area defined by the bottom wall when external loads act on the container walls in such a manner that a point load is externally applied to the surface centers of the front wall and the rear wall and a linear load is externally applied along the horizontal corrugations of the side walls, causing the front wall and the rear wall to be moved toward each other and the side walls to be moved toward each other, a surface load being simultaneously exerted on the bottom wall and the top wall in such a manner that the bottom wall and the top wall move toward each other.
- So the inner container is reduced in height by the folding process, the horizontal corrugations in the side walls causing the side walls to fold in a defined manner against the elastic restoring forces of the inner container and ensuring that the top wall and the bottom wall are disposed one on top of the other essentially congruently after folding.
- When the inner container is compressed to its folded size, the compressed inner container can be secured in the folded configuration by means of belts and stacked with the bottom wall in the horizontal position or, if needed, disposed in a horizontal row of a plurality of folded inner containers with the bottom wall in the vertical position in order for the folded inner container to be stored or transported.
- When folded inner containers and transport pallets provided with an outer jacket are transported together, the folded inner containers can advantageously also be disposed in a stack within the outer jacket on the transport pallet.
- If, according to an advantageous embodiment, the front wall additionally has two diagonal corrugations below a horizontal wall axis of the front wall, the horizontal wall axis being disposed in a shared horizontal plane with the horizontal corrugations, the diagonal corrugations extending between an outer container edge and the wall axis and approaching each other, a defined disposition of the outlet socket or of an outlet fitting already connected to the outlet socket is possible in the folded state of the inner container as a result of the folding process.
- Preferably, the rear wall also has two diagonal corrugations below a horizontal wall axis of the rear wall, the horizontal wall axis being disposed in a shared horizontal plane with the horizontal corrugations, the diagonal corrugations extending between a lower container edge and the wall axis and approaching each other, enabling identical folding of the front wall and the rear wall.
- Particularly precise mutual covering of the front wall and the rear wall and, thus, particularly high reproducibility of the folded size of the inner container can be achieved if the front wall and the rear wall each have two diagonal corrugations above the wall axes of the front wall and the rear wall, the wall axes being disposed in a shared horizontal plane with the horizontal corrugations, the diagonal corrugations extending from the upper container edge to the horizontal wall axis and approaching each other.
- This results in a disposition of four diagonal corrugations on the front wall and four diagonal corrugations on the rear wall, which means that the point load acting on the surface centers of the front wall and the rear wall will cause the outlet socket formed on a lower wall portion of the front wall or the outlet fitting already connected to the outlet socket to move into a space formed between the bottom wall and the top wall upon folding, the outlet socket or the outlet fitting being accommodated in said space, the filling opening formed in the top wall maintaining its position relative to the top wall during the folding process. So the inner container is reduced in height by the folding process, the diagonal corrugations in the front wall and the rear wall and the horizontal corrugations in the side walls leading to defined folding of wall portions of the front wall and the rear wall and the side walls against the elastic restoring forces of the inner container.
- If the diagonal corrugations on the front wall and the rear wall each run parallel to a surface diagonal, the inner container can be folded with particularly low folding forces.
- It proves particularly advantageous if each two diagonal corrugations coming from a shared container edge form a pair of corrugations and have longitudinal axes forming an isosceles triangle with the container edge, such that, in cooperation with the horizontal corrugations of the side walls, the wall folds formed during folding are located in a shared horizontal plane between the bottom wall and the top wall of the inner container.
- If the diagonal corrugations of a pair of corrugations are disposed at an angle of 45° to the container edge, the folding process can be carried out with as little folding load as possible.
- Preferably, the diagonal corrugations of each pair of corrugations have longitudinal axes that intersect with the horizontal wall axis in a shared horizontal intersection, enabling further reduction of the folding load.
- If the pairs of corrugations disposed on the front wall and the rear wall have a distance X between the horizontal intersections of their longitudinal axes with the horizontal wall axis, in particular the distance between the side wall folds of the folded inner container is set accordingly.
- It is particularly advantageous if the distal corrugation ends of the diagonal corrugations extend into the container edge.
- Preferably, the distal corrugation ends of the diagonal corrugations extend into the container corners, making a particularly small height of the inner container folded to the folded size possible.
- If the diagonal corrugations have a corrugation bottom continuously rising toward a wall surface at their proximal corrugations ends, the diagonal corrugations continuously flatten out at the corrugation ends, which means that there is no reinforcement counteracting the folding at the end of the folding line formed by the diagonal corrugation.
- Preferably, the corrugation ends of the horizontal corrugations extend into the container edges, the folded size in the plane of the bottom wall and of the top wall thus being adjusted to the planar size of the bottom wall or of the top wall.
- Preferably, the horizontal corrugations have a concave corrugation bottom which has an enlarged profile radius for forming corrugation widenings at the corrugation ends, which means that the formation of kinks, i.e., plastic deformation, is avoided in the area of the container edges where multiple folds meet during the folding process.
- It is particularly preferred if the corrugation widenings have at least a radial corrugation running in the corrugation bottom, a reinforcement thus being created in the area of the vulnerable container edges. If, moreover, at least a horizontal corrugation is formed in the front wall and in the rear wall adjacent to the corrugation widenings, the defined formation of the fold in the area of the front wall and the rear wall can be supported additionally.
- According to the invention, the folding of the inner container takes place in the following way: a point load is externally applied to the surface centers of the front wall and the rear wall and a linear load is externally applied along the horizontal corrugations of the side walls in such a manner that the front wall and the rear wall are moved toward each other and the side walls are moved toward each other, a surface load being simultaneously exerted on the bottom wall and the top wall in such a manner that the bottom wall and the top wall move toward each other.
- Hereinafter, the invention will be described in more detail based on an example of an embodiment illustrated in the drawing.
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FIG. 1 shows a transport and storage container for liquids with an inner container made of plastic inserted into an outer jacket of a transport pallet; -
FIG. 2 is an isolated illustration of the inner container illustrated inFIG. 1 ; -
FIG. 3 shows the inner container ofFIG. 2 in a folded state; -
FIG. 4 is a schematic illustration of the inner container for clarifying the folding process; -
FIG. 5 is a schematic illustration of the inner container with diagonal corrugations disposed on a front wall and a horizontal corrugation disposed on a side wall; -
FIG. 6 is an isometric illustration of an embodiment of the inner container; -
FIG. 7 is a front view of the inner container illustrated inFIG. 6 ; -
FIG. 8 is a side view of the inner container illustrated inFIG. 6 . -
FIG. 1 shows a transport andstorage pallet 10 having, as essential components, atransport pallet 11 on which anouter jacket 14 is disposed,outer jacket 14 being realized as a cage havingvertical bars 12 andhorizontal bars 13. Aninner container 15 made of plastic is disposed ontransport pallet 11 withinouter jacket 14,inner container 15 having anoutlet socket 18 provided with an outlet fitting 17 in afront wall 16 on a front side, as shown inFIG. 2 in particular. -
Outlet socket 18 is located in alower wall portion 19 offront wall 16 in an area of transition to abottom wall 20 ofinner container 15,bottom wall 20 ofinner container 15 being disposed on apallet floor 21 oftransport pallet 11.Bottom wall 20 connectsfront wall 16 to arear wall 22, which is formed on the rear side ofinner container 15, and twoopposing side walls top wall 25 provided with a filling opening 26 is formed oppositebottom wall 20. For securinginner container 15 when it is received inouter jacket 14, traverses 27 connected to an uppercircumferential edge 28 ofouter jacket 14 extend abovetop wall 25. -
FIG. 3 showsinner container 15 in the folded state, in whichinner container 15 has a defined foldedconfiguration 29 havingwall folds 30 which are formed inside walls container bottom 20 in the illustration ofinner container 15 according toFIG. 3 . Moreover,inner container 15 hascontainer edge folds upper container corner 33 toside wall fold 30 and from alower container corner 34 toside wall fold 30 and which are formed in a front plane ofinner container 15. Furthermore, when in the folded state,inner container 15 hasinner folds upper container corner 33 into afold space 37 and from alower container corner 34 into afold space 38.Fold spaces edge fold 40 formed on anupper container edge 39 ofinner container 15 and adjacentcontainer edge fold 31 and between anedge fold 42 formed on alower container edge 41 ofinner container 15 and adjacentcontainer edge fold 32. - For a defined formation of folded
configuration 29,inner container 15 illustrated inFIG. 2 hasdiagonal corrugations front wall 16 and itsrear wall 22 andhorizontal corrugations side walls horizontal corrugations inner container 15. For clarification of the folding process,diagonal corrugations FIG. 4 . - When the folding process is carried out, point loads P, linear loads L and surface loads F externally act on
inner container 15 as illustrated inFIG. 4 , point loads P acting in opposite directions being exerted oncentral surface portions 49 offront wall 16 andrear wall 22, linear loads L acting in opposite directions being exerted onside walls horizontal corrugations bottom wall 20 andtop wall 25. -
Diagonal corrugations 43 to 46 andhorizontal corrugations 47 to 48 define folding lines when external loads act oninner container 15 as illustrated inFIG. 4 , such thatfront wall 16 andrear wall 22 are elastically deformed inward alongdiagonal corrugations 43 to 46 andinner folds FIG. 3 form alongdiagonal corrugations 43 to 46 andside walls folds 30 illustrated inFIG. 3 form alonghorizontal corrugations lateral container edges FIG. 2 ) are turned intocontainer edge folds - When
inner fold 35 is formed, approximately triangular surface areas A and B, which are designated A and B inFIG. 4 for clarification of the folding process, are moved into a position in which they cover each other; likewise, surface areas C and D are moved into a position in which they cover each other wheninner fold 36 is formed. Furthermore,horizontal corrugations front wall 16 andrear wall 25 move toward each other along awall axis 52 which runs through the intersection of the longitudinal axes of the corrugations inFIG. 4 , both wall portions A and B and wall portions C and D moving into a position in which they cover each other. -
FIG. 5 shows another schematic illustration ofdiagonal corrugations FIG. 2 , in whichdiagonal corrugations upper container edge 54 andhorizontal wall axis 52 anddiagonal corrugations lower container edge 55 andhorizontal wall axis 52.Diagonal corrugations 43 and 56 anddiagonal corrugations corrugations corrugations diagonal corrugations diagonal corrugations FIG. 4 , together each form an isosceles triangle withlateral container edges container edges - Unlike
diagonal corrugations 43 to 46 illustrated inFIG. 4 , whose disposition coincides with the surface diagonals and whose longitudinal axes meet in a shared horizontal intersection M coinciding with the surface center in the case of the illustration ofFIG. 4 , the longitudinal axes ofdiagonal corrugations diagonal corrugations corrugations FIG. 5 , intersect in horizontal intersections S1 and S2 onwall axis 52, intersections S1 and S2 having distance X from each other. Distance X prevents side wall folds 30 coming from container edges 50 and 51 from meeting when the folding process is carried out and plastic deformation from occurring incentral surface portion 49. - As shown in
FIGS. 6 to 8 , corrugation ends 61 ofdiagonal corrugations 43 to 46 extend into container edges 50 and 51, respectively, more specifically intoupper container corners 33 andlower container corners 34, respectively. At their proximal corrugation ends 62,diagonal corrugations 43 to 46 have corrugationbottoms 64 continuously rising toward awall surface 63 offront wall 16 andrear wall 22, respectively. - Corrugation ends 65 on both sides of
horizontal corrugations horizontal corrugations diagonal corrugations corrugation widenings 66 on corrugation ends 65. - As shown in
FIG. 8 in particular,corrugation widenings 66 of the embodiment example at hand are provided with a plurality of parallelradial corrugations 68 formed incorrugation bottom 64 and formed closely together across the entire length of corrugation bottom 64 within corrugation widening 66. - As shown in
FIG. 7 in particular,front wall 16, like opposite rear wall 22 (not shown), has a plurality ofhorizontal corrugations 69 adjacent tocorrugation widenings 66 ofhorizontal corrugations horizontal corrugations 69 extending alonghorizontal wall axis 52 in wall portion 70 offront wall 16 andrear wall 22 limited by pair ofcorrugations 57 formed bydiagonal corrugations corrugations 58 formed bydiagonal corrugations
Claims (18)
1. An inner container (15) made of plastic for transporting and storing liquids, the inner container (15) having an outlet socket (18) for connecting an outlet fitting (17) on a front side, a bottom wall (20) connecting two side walls (23, 24), a rear wall (22) and a front wall (16) of the inner container (15) and serving to support the inner container (15) on a pallet floor (21) of a transport pallet (11) provided with an outer jacket (14) for receiving the inner container (15), and a top wall (25) located opposite the bottom wall (20) and provided with a filling opening,
characterized in that the side walls each have a horizontal corrugation (47, 48), the horizontal corrugations (47, 48) being disposed in a shared central horizontal plane.
2. The inner container according to claim 1 ,
characterized in that the front wall (16) has two diagonal corrugations (45, 46) below a horizontal wall axis (52) of the front wall (16), the horizontal wall axis (52) being disposed in a shared horizontal plane with the horizontal corrugations (47, 48), the diagonal corrugations (45, 46) extending between a lower container edge (55) and the wall axis (52) and approaching each other.
3. The inner container according to claim 2 ,
characterized in that the rear wall (22) has two diagonal corrugations (45, 46) below a horizontal wall axis (52) of the rear wall (22), the horizontal wall axis (52) being disposed in a shared horizontal plane with the horizontal corrugations (47, 48), the diagonal corrugations (45, 46) extending between a lower container edge (55) and the wall axis (52) and approaching each other.
4. The inner container according to claim 3 ,
characterized in that the front wall (16) and the rear wall (22) each have two diagonal corrugations (43, 44) above the wall axes (52) of the front wall (16) and the rear wall (22), the wall axes (52) being disposed in a shared horizontal plane with the horizontal corrugations (47, 48), the diagonal corrugations (43, 44) extending from the upper container edge (54) to the horizontal wall axis (52) and approaching each other.
5. The inner container according to claim 2 ,
characterized in that the diagonal corrugations (43, 46; 44, 45) on the front wall (16) and the rear wall (22) each run parallel to a surface diagonal.
6. The inner container according to claim 2 ,
characterized in that each two diagonal corrugations (43, 46; 44, 45) coming from a shared lateral container edge (50, 51) form a pair of corrugations (57, 58, 59, 60) and have longitudinal axes forming an isosceles triangle with the container edge (50, 51).
7. The inner container according to claim 6 ,
characterized in that the diagonal corrugations (43, 46; 44, 45) of each pair of corrugations (57, 58, 59, 60) are disposed at an angle of 45° to the lateral container edge (50, 51).
8. The inner container according to claim 6 ,
characterized in that the diagonal corrugations (43, 46; 44, 45) of a pair of corrugations (59, 60) have longitudinal axes intersecting with the horizontal wall axis (52) in a shared horizontal intersection M.
9. The inner container according to claim 6 ,
characterized in that the pairs of corrugations (57, 58) disposed on the front wall (16) and the rear wall (22) have a distance x between the horizontal intersections S1 and S2 of their longitudinal axes with the horizontal wall axis (52).
10. The inner container according to claim 2 ,
characterized in that distal corrugation ends (61) of the diagonal corrugations (43, 44, 45, 46) extend into the lateral container edge (50, 51).
11. The inner container according to claim 2 ,
characterized in that distal corrugation ends (61) of the diagonal corrugations (43, 44, 45, 46) extend into container corners (33, 34).
12. The inner container according to claim 2 ,
characterized in that the diagonal corrugations (43, 44, 45, 46) have a corrugation bottom (64) continuously rising toward a wall surface (63) at their proximal corrugation ends (62).
13. The inner container according to claim 2 ,
characterized in that corrugation ends (65) of the horizontal corrugations (47, 48) extend into the container edges (50, 51).
14. The inner container according to claim 13 ,
characterized in that the horizontal corrugations (47, 48) have a concave corrugation bottom (64) which has an enlarged profile radius (67) for forming corrugation widenings (66) at the corrugation ends (65).
15. The inner container according to claim 14 ,
characterized in that the corrugation widenings (66) have at least a radial corrugation (68) running in the corrugation bottom (64).
16. The inner container according to claim 14 ,
characterized in that at least a horizontal corrugation (69) is formed in the front wall (16) and the rear wall (22) adjacent to the corrugation widenings (66).
17. A transport and storage container for liquids, the transport and storage container comprising an inner container made of plastic according to claim 1 .
18. A method for folding an inner container according to claim 1 ,
characterized in that a point load P is externally applied to the surface centers of the front wall (16) and the rear wall (22) and a linear load L is externally applied along the horizontal corrugations (47, 48) of the side walls (23, 24) in such a manner that the front wall (16) and the rear wall (22) are moved toward each other and the side walls (23, 24) are moved toward each other, a surface load F being simultaneously exerted on the bottom wall (20) and the top wall (25) in such a manner that the bottom wall (20) and the top wall (25) move toward each other.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020105525.0 | 2020-03-02 | ||
DE102020105525.0A DE102020105525A1 (en) | 2020-03-02 | 2020-03-02 | Inner containers made of plastic and transport and storage containers for liquids with an inner container made of plastic |
Publications (1)
Publication Number | Publication Date |
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US20210269233A1 true US20210269233A1 (en) | 2021-09-02 |
Family
ID=77271304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/189,616 Pending US20210269233A1 (en) | 2020-03-02 | 2021-03-02 | Inner container made of plastic and transport and storage container for liquids having an inner container made of plastic |
Country Status (5)
Country | Link |
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US (1) | US20210269233A1 (en) |
CN (1) | CN113335775B (en) |
AU (1) | AU2021201124A1 (en) |
BR (1) | BR102021003894A2 (en) |
DE (1) | DE102020105525A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2367054A (en) * | 2000-09-01 | 2002-03-27 | Collapsible Containers Ltd | A One-piece Moulded Watertight Collapsible Container |
US6786394B2 (en) * | 2001-04-11 | 2004-09-07 | Weyerhaeuser Company | Unitary bulk container for use with internal bag |
WO2014082026A1 (en) * | 2012-11-26 | 2014-05-30 | Advanced Technology Materials, Inc. | Substantially rigid foldable container |
US11407583B2 (en) * | 2018-11-30 | 2022-08-09 | Schoeller Allibert Gmbh | Intermediate bulk container |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0920329A (en) * | 1995-07-03 | 1997-01-21 | Tomiyuki Hirota | Collapsible container |
NL1020391C2 (en) * | 2002-04-15 | 2003-10-17 | Fountain Patents B V | Foldable plastic container and method and mold for its manufacture. |
CN2673805Y (en) * | 2003-12-15 | 2005-01-26 | 亲和企业有限公司 | Soft storage container |
CN101282884A (en) * | 2005-09-16 | 2008-10-08 | 内法布包装匈牙利有限公司 | Double-walled container |
JP3178275U (en) * | 2012-06-27 | 2012-09-06 | 迪外(上海)貿易有限公司 | Folding storage box |
US9656779B2 (en) * | 2014-09-10 | 2017-05-23 | Graphic Packaging International Canada, Ulc | Cartons and blanks with pleats proximate corners, and associated methods |
MX2018011427A (en) * | 2016-03-24 | 2019-02-20 | Mauser Werke Gmbh | Pallet container. |
CN206142196U (en) * | 2016-07-27 | 2017-05-03 | 青岛朗夫包装有限公司 | Novel IBC cube inside lining bag |
-
2020
- 2020-03-02 DE DE102020105525.0A patent/DE102020105525A1/en active Pending
-
2021
- 2021-02-20 AU AU2021201124A patent/AU2021201124A1/en active Pending
- 2021-03-01 BR BR102021003894-2A patent/BR102021003894A2/en unknown
- 2021-03-02 CN CN202110229087.XA patent/CN113335775B/en active Active
- 2021-03-02 US US17/189,616 patent/US20210269233A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2367054A (en) * | 2000-09-01 | 2002-03-27 | Collapsible Containers Ltd | A One-piece Moulded Watertight Collapsible Container |
US6786394B2 (en) * | 2001-04-11 | 2004-09-07 | Weyerhaeuser Company | Unitary bulk container for use with internal bag |
WO2014082026A1 (en) * | 2012-11-26 | 2014-05-30 | Advanced Technology Materials, Inc. | Substantially rigid foldable container |
US11407583B2 (en) * | 2018-11-30 | 2022-08-09 | Schoeller Allibert Gmbh | Intermediate bulk container |
Also Published As
Publication number | Publication date |
---|---|
CN113335775B (en) | 2023-09-22 |
CN113335775A (en) | 2021-09-03 |
BR102021003894A2 (en) | 2021-11-09 |
AU2021201124A1 (en) | 2021-09-16 |
DE102020105525A1 (en) | 2021-09-02 |
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