Folding container

Abstract: This patent application concerns a parallelepiped folding container having two horizontal walls capable of being folded towards the interior of said container so that the two walls can be then brought one against the other.

Description: This patent application concerns a folding container used in its preferred embodiment for the transport of clothing items. Today, large lots of clothing items shipped by air, train or truck are packaged in large parallelepiped cardboard boxes often provided with a horizontal rod at the top on which the clothes hanger are hung. These boxes are often placed on wooden pallets for handling purposes by means of mechanical fork lifts. These boxes are not however very practical in that they are fairly fragile. During handling they may easily be squashed or ripped; the sides of the boxes can also easily be damaged - to the detriment of the clothing items contained in the same - when they are exposed to weather, above all rain. The fact that they are so fragile often means that they can only be used once; in other words to all effects and purposes the boxes are not reusable. In order to make these cartons sturdier, they were subsequently provided with an internal stiffening frame; the designers of said frame intended that at least this would be recyclable in that once the box was emptied it would be returned to the sender to be used inside another identical box. After some experience with these frames it appeared that the operators removing the goods from the boxes rarely dismounted and recovered the stiffening frames entirely so that often these were returned to the sender incomplete and therefore practically unusable. An additional practical limitation of these cartons used for packaging clothing items - regardless of whether the same are provided with internal stiffening frame or otherwise - is that the same are very easy to open or tamper with, even in the case of theft. It often occurred in fact that these boxes were tampered with in warehouses or even on the actual transport means, with the result that the goods contained in the same were stolen. The GB A 1007 196 patent discloses a container which, after delivery of the freight, can be readily collapsed into a small volume for the return journey or for storage purposes. The collapsible container comprises an horizontal, rectangular base or floor member, rectangular vertical opposed side members hingedly connected to the base member and features a central hinge along a line parallel to the base member to permit the inward folding of the opposed side members; the collapsible container also comprising a rectangular horizontal roof member hingedly connected along the two edges to the frames of the collapsing opposed side members; the rear end of the container being dosed by a rectangular rear end member hingedly connected to the base member, thus allowing for inwardly collapsing of the rear end member, assuming an horizontal position parallel to the base member; the front end of the container being closed by a vertical rectangular front end member having a door hingedly connected to the base member for the inwardly collapsing of the front end member, assuming an horizontal position parallel to the base member. It is true that an advantage of the collapsible container disclosed in the English patent is the volume reduction when closed. It is also true, however, that the dosing operation and the opening operation, in particular, are quite complicated. To collapse the container, first of all it is necessary to unlock the bolts that connect the front and rear end members of the container. Then, it is necessary to hold the front and rear end members during the inwardly collapsing in order to avoid serious damage should the end members be free when falling onto the base member of the container. The same is true for the inwardly collapsing of the opposed side members, since it is necessary to hold the roof member to avoid its free fall, thus smashing the members below with its weight. The opening operation of the container is even more complicated, since the operator needs to lift the member to open it. The biggest effort is required to lift the roof member. In this stage, the operator needs to balance the entire weight of the roof member, plus the weight of the opposed side members that are connected to the lateral edges of the roof member. This first operation requires the presence of various operators. Successively, the operator needs to overturn the two front and rear end members of the container upwards. The FR 2130226 patent describes a folding container having two vertical non- collapsing lateral walls, and two horizontal closing walls, a top and a bottom wall, each of them composed of two members hinged to each other so as to be collapsed into the container in order to make the two lateral non collapsing walls get near. Said container is closed, both at the front and the rear member, by two lids which, from the closing position, can be rotated outwardly of 270° so as to reach the position of maximum opening in which said lids touch the external surface of the non-collapsing lateral walls. Said container is not very rigid and is incapable of withstanding heavy loads when the lids are in opening position. In fact, when the lids are in opening position the downward collapsing of the two members of the horizontal top wall is barred only by two bolts while, when said lids are in dosing position they interfere between the two collapsing horizontal walls preventing, with the maximum guarantee, the accidental folding of the horizontal collapsing walls. In other words, said container reveals a satisfactory rate of rigidity only when are the lids in closing position, while the structure of said container becomes quite unstable during the opening phase of the lid. However, it will never be possible to load said containers with very heavy goods, since the hinge which connects the two members of the bottom wall is not capable of withstanding heavy loads, due to the fact that said container is provided with lateral supporting feet only, while no feet are located by the central hinge. Moreover, said container needs wide spaces during the operations of complete opening or closing. More exactly, the complete opening or closing of said container (without moving the folding container itself) may be performed only in a room whose width is bigger than that of the container, providing that both its front and rear lid must be rotated of 270° in order to move from the maximum opening position to the closing position and vice versa. The purpose of the present invention is to realise a collapsible freight container capable of preserving its resistance and rigidity properties even when the lids are opened. Another purpose of said invention is to realise a collapsible container which can be loaded with very heavy goods, even though its horizontal bottom wall is composed of two folding elements. A further purpose is to realise a collapsible container capable of being easily opened and dosed, quickly and with no effort. Last but not least purpose of this invention is to realise a collapsible container capable of being folded or completely opened in a room having the same width as the container. The objectives above are obtained with the collapsible container according to claim 1). Said container comprises two rigid non-collapsing opposing sides and two horizontal closing walls, a bottom and a top wall, that collapse "like a book" so as to be inwardly folded, wherein the container also comprises two closing vertical lids, a front and a rear lid, which are hinged into two respective frames located both in the front and rear side of the container, so as to have the frames located between the pair of sides and the pair of horizontal collapsing walls. Each of said frames of the container is in tum hinged to vertical pins so that it can rotate inwardly. Finally, it must be said that the container according to the invention is provided with centre supporting feet, positioned on the hinging line which connects the two members featuring the bottom horizontal wall of the container. The opening and closing operations of the container according to the invention are much less tiring than those of the container according to the aforementioned English patent. In the container according to the invention the opening of the dosing lids, a front and the rear lid, does not involve any operator's effort since said lids are opened and dosed like a door, thus the operator is not expected to balance the weight of said lids, while this operation is due in the container described in the English patent . The high resistance and rigidity of the container according to the invention is due to the fact that its lids are hinged to a rigid frame which remains always located between the pair of collapsing horizontal walls even when the lids are opened. It is just thanks to said frames that the container in question can boast its properties of sturdiness and rigidity which make also possible to pile up the containers, operation which is not possible with the container described in the aforementioned French patent. The folding container in question consists of a supporting parallelepiped structure whose walls are padded with thin but sturdy sheet plate making the container resistant to weather, attempted theft, accidental jolting or compression. A further practical and economic advantage of the folding container according to the invention, related to its sturdiness, is the fact that the same may be reused repeatedly; moreover, in order to facilitate its return to the sender, the folding container according to the invention, may be folded down completed when empty to the shape of a practical square or rectangular panel. Finally, it should be mentioned that under the bottom padding wall there are a number of perimeter supporting feet which keep said bottom wall at a certain height from the ground making it possible to lift the item directly by means of a mechanical fork lift without the use of wooden pallets. Even if the container in question is designed expressly for the transport of clothing items, it may obviously be used just as efficiently to transport other articles, in view of the perfect planarity of its internal walls. For major clarity the description of the invention continues with reference to the enclosed drawings which are intended for purposes of illustration and not in a limiting sense whereby: figure 1 is an axonometric view of container giving background information with the lids open; figure 2 is similar to figure 1 but with the lids shut against the internal surface of the sides of the container; figure 3 is an axonometric view of the container giving background information with the top horizontal wall during the closing stage; figure 4 is an axonometric view of the container according to figure 3, completely folded down; figure 5 is similar to the previous figure but with a section of one of the sides removed to show some of the details which are even more evident in the relevant blow-ups. Figures 6 - 11 refer to a container according to invention, which differs from the first only by the provision of a pivoting frame for the doors designed to make the container in question sturdier, especially when the lids are open. Figures 10 and 11 are two cross-sections of a special stopping device used in the container according to invention. Figures 12, 13 and 14 are three orthogonal views of a special compass opening support foot used in the container according to invention. With particular references to figures 1 and 2, the folding container (1) giving background information consists in its simplest embodiment of a frame padded with sheet plate panels. The same has a parallelepiped shape provided with two opposing supporting sides (2) each consisting of two cross-members with "L" shaped transverse cross-section (2a) and by three uprights (2b). The top and the base of said opposing sides (2) are provided with two special horizontal sealing walls (3) each consisting of two identical rectangular frames (4) hinged reciprocally to the relevant internal rods (4a). The external rod (4b) of each of the two rectangular adjacent frames (4) is hinged to the horizontal wing of the "L" shaped cross member (2a) of the relevant side (2). When the container (1) giving backgroung information is in operating position, the two frames (4) making up each horizontal wall (3), must remain in horizontal and coplanar position; for this purpose, in the opposing cross members (4c) of one of the frames (4) there are respective bolts (5) whose pointed ends project from relevant holes (4d) realised at the end of said cross members (4c) and penetrate the tubular cross members (4e) of the adjacent supporting frame (4) through the holes (4f). The particular structure of said cross members (4c and 4e) is illustrated clearly in the blow up in figure 5. It is evident that the two bolts (5) are designed to provide continuity to the two pairs of tubular cross members (4c and 4e). The openings of the container (1) giving background information are shut by means of two opposing and counter-rotating lids (6) each of which is hinged by means of pins having a vertical axis, between the horizontal wings of the cross members (2a) of each side (2). Each of said lids (6) may be rotated so that it completely shuts the relevant opening of the container giving background information (1); when the same is in operating position, each lid (6) must naturally be fixed into closing position. For this purpose, each lid (6) is provided on the upright (6a) opposite to the upright (6b) hinged to the side (2a), with two bolts having vertical axis (7) which slide inside the upright (6a). The pointed ends of the two bolts (7) may be pushed out of the tubular upright (6a) housing the same through two holes (6c) with which the same is provided at the two ends. When the lid (6) is shut, the pointed ends of said bolts (7) penetrate the relevant opposing holes having vertical axis (8) realised on the internal surface of the horizontal wing of the bottom and top cross members (2a) of each side (2). When the container (1) giving background information is compacted, it is necessary firstly to remove from the relevant housing holes (8) the bolts (7) provided on the two lids (6). Once said lids (6) are released, the same may rotate towards the interior of the container (1) until their internal face touches the internal face of the side (2) on which the same are hinged. For this purpose, it is evident that the width of said lids (6) must be inferior to the length of the sides (2), otherwise the same could not be fully housed in the container. In order to lock said lids (6) into this position, the internal face of the horizontal wing of the cross members (2a) of the sides (2) is provided with opposing pairs of holes having vertical axis (9) in which the pointed ends of the bolts (7) on the lids (6) house, when the same touch the internal face of the relevant side (2); see the blow up in figure 5. The second operation required to reduce the dimensions of the container (1) consists of uncoupling the two halves of the two horizontal closing walls (3); for this purpose it is sufficient to pull back the two bolts (5) housed in one of the two frames (4) so that their pointed ends come out of the cross member (4e) of the adjacent frame. This operation interrupts the continuity between the two frames (4) making up each closing wall (3). This permits folding the two halves of each wall (3) against each other, towards the interior of the container (1), by means of the three hinges: one being in an intermediate position between the two frames (4) and the other two being between the external rod (4b) of each of the frames (4) and the relevant cross member (2a) of the side (2); see figure 3. It is evident that once both the horizontal walls (3) have been folded, the container (1) assumes the shape of a panel having a rectangular surface, which is very easy and inexpensive to transport, as shown in figures 4 and 5. In the enclosed drawings, the number (10) illustrates the special feet, positioned edgewise, provided under the bottom wall of the container according to the invention and the container giving background information. With reference to figures 6 - 11, the container (100) according to invention is characterised in that its lids (60) are hinged to a second frame (11), which is in turn hinged between the horizontal wings of the cross member (2a) of each side (2). Said second frame (11) is designed to make the container according to invention sturdier, especially when the lids (60) are open. As shown in figure 6, when the lids (60) are open, said second frame (11) is positioned between the opposing sides (2) and the horizontal closing walls (3) whose frames (4) are supported in aligned and coplanar position by the second frame (11) by means of which the same supports the stress, as in the previous version, which the bolts (5) sustain. The container according to invention is particularly suitable for transporting very heavy items, which require a sturdy and rigid supporting frame. As shown in the blow up in figure 6, each lid (60) is provided on its upright (60a), opposite to that (60b) hinged to the second frame (11), with two bolts having vertical axis (70) which slide within the upright (60a). The pointed ends of the two bolts (70) may be pushed out of the upright (60a) through the two holes (60c) provided at its ends. Said bolts (70) in fact perform two different expulsion strokes: a short stroke and a long stroke. In the case of the short expulsion stroke, the tip of the bolt (70) penetrates into the corresponding holes (11a) provided on the bottom and top cross members of the second frames (11); said expulsion stroke stops the lids (60) inside the second frames (11) when the container (100) is in open and operating position. In the case of the longer expulsion stroke, the tip of the bolts (70) - after crossing the above holes (11a) - penetrates the holes (9) provided on the internal face of the horizontal wing of the cross members (2a) of the sides (2). This longer expulsion stroke stops the lids (60) and the second frames (11) at the same time against the internal face of the sides (2); as shown in fig. 9, when the container (100) is fully folded down, the lids (60) and the second frames (11) abut against the internal face of the sides (2). With reference to figs. 10 and 11, it should be noted that in order to stop each second frame (11) in open position - namely in a position between the opposing sides (2) and the walls (3), as shown in fig. 6 - an oscillating tooth (12) is provided, which is embedded and pivoted within the upright (2b) against which the upright of the second frame (11) touches; said tooth (12) can be held with a finger and pushed into its housing overcoming the antagonistic force of an expulsion spring (13). The upright of the second frame (11) being provided with a slot (14) into which the tooth (12) fixes. With reference to figures 12, 13 and 14, attention is drawn to the fact that this container (100) according to invention is provided not only with external feet (10) but also with centre supporting feet (15) positioned on the hinging line between the two frames (4) which contribute to forming the bottom wall (3). These centre feet (15) are provided in consideration of the fact that the container is designed to transport particularly heavy items, and therefore can sustain heavy bending strain on the bottom wall (3). Each of these feet (15) is characterised by a compass structure whose arms are pivoted under the internal rods (4a) of the frames (4) so that each foot (15) may close like a compass and remain embedded between the frames (4) when the same are rotated and touch against each other as the container (100) is folded, as shown in fig. 14.

Claims: A folding container having a parallelepiped frame padded with sheet plate panels, consisting of: two opposing sides (2) each consisting of two cross members having "L" shaped cross-section (2a) and two uprights (2b); the internal face of the horizontal wing of each of said cross-members (2a) being provided with three holes (8) at its ends and a third hole (9) positioned approximately at three-quarters of its length; two horizontal closing walls (3), a bottom and a top wall, each consisting of a pair of identical frames (4) having rectangular plane; the external rod (4b) of each frame (4) being hinged to the horizontal wing of the "L" shaped cross member (2a) of one of the sides (2), while the internal rods (4a) of each adjacent pair of said frames (4) are hinged reciprocally; within the opposing cross members (4c) of one of the frames (4) of each adjacent pair of frames (4) relevant bolts (5) are housed whose pointed ends project form the holes (4d) provided at the end of the cross members (4c) to penetrate the tubular cross members (4e) of the adjacent frame (4) through the holes (4f) realised on said cross members (4e); a perimeter series of feet (10) said container is characterised in that it applies: two opposing lids (60) hinged to a second frame (11) which is in turn hinged by means of pins having vertical axis between the horizontal wings of the cross members (2a) of each side (2); centre supporting feet (15) positioned on the hinging line between the two frames (4) which contribute to forming the bottom wall (3); wherein each of these feet (15) features a compass structure whose arms are pivoted under the internal rods (4a) of the frames (4) and wherein said second frames (11) can rotate outward of 90°. A folding container according to the previous claim characterised in that each of said lids (60) houses, on its upright (60a), two bolts having vertical axis (70) whose pointed ends project through two holes (60c) provided at the end of the upright (60a) while the top and the bottom cross-members of the second frame (11) are provided with holes (11a) into which the tips of the bolts slide. A folding container according to the previous claims, characterised in that the unhinged upright of the frame second (11) is provided with a lot (14) in which an oscillating tooth (12) subject to the action of an expulsion spring (13) fixes and is pivoted in the upright (2b), against which the upright of the second frame (11) touches.

Inventors: COPPI PAOLO, COPPI, PAOLO
Applicants: PENANG HOLDING NV, PENANG HOLDING N.V
Application year: 1997
Main classification: B65D88
IPC codes: B65D19, B65D88, B65D6