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(11) | EP 0 994 043 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Package for a pile of flat objects |
| (57) A package (1) for packs (2) of flat piled objects, in particular for ceramic tiles,
comprises two half-blanks (4) made of cardboard and identical, each of which comprises
two flaps (40) joined along a fold line (41). Each flap (40) is destined in use to
follow a profile of a flank of a pack (2) of tiles (3). A top flap and a bottom flap
(42) are joined by fold lines (43) to each flap (40) and will in use be superposed
on a perimetral part of, respectively, a topmost and bottom-most face of the pack
(2) of tiles (3). A tongue (44) is joined by a fold line (45) to one of the two flaps
(40). The tongue (44) of one half-blank (4) is destined to be superposed on an end
of another half-blank (4). A package of the type described enables a relatively simple
and rapid packaging of tiles of varying formats. |
[0001] Specifically, though not exclusively, the invention can be used for packaging ceramic tiles piled one on top of another.
[0002] The prior art teaches packages for ceramic tiles comprising a single long cardboard blank having four side-flaps connected by fold lines, which side-flaps are conformed and arranged such as to create a snug fit for edges of a pack of tiles. Two further flaps, destined for the top and bottom of the pack of tiles, and each of a long and narrow strip-shape and one arranged superiorly and the other inferiorly, are associated to each flap by means of fold lines along the long sides of the side-flaps. The top and bottom flaps will protect a part of the two faces, upper and lower, of the tile pack. The protected part of the two faces will be narrow and arranged along the edge zone of the tiles. When the package is made up, the four top and four bottom flaps will frame the topmost and bottom-most tile surfaces of the pack of tiles.
[0004] Normally these known-type packages are applied on tile packs using automatic packaging machines comprising at least one device for successively feeding the packs in an advancement direction, and a device for singly obtaining the cardboard packaging from a store before positioning them in a work station in a perpendicular position to the advancement direction of the tiles. During operation, each single cardboard-blank packaging unit is wrapped around a pack of tiles. The packs are supplied, one by one, to the work station, where a pusher acts singly on each pack to push the front side thereof against an opened-out cardboard blank, which latter is then folded by suitable guide means against the right and left sides of the pack in such a way that the pack itself is enveloped on three sides. Then a device completely closes the package on the remaining fourth side, bringing the open ends together ready for gluing.
[0005] Finally, the top and bottom flaps are folded about the top and bottom faces of the pack. The final result is a package which is protected on all four lateral flanks with the top and bottom faces being framed along the perimeter thereof.
[0007] Firstly, the packages are not particularly suitable for large-format tile packs (for example 60x60 cm.) since the scored cardboard blanks needed would be considerably large, especially length-wise, and therefore rather massive and quite complicated for the packaging machines to handle.
[0008] Secondly, the operations necessary for setting up the packaging machines to the specifications required in a change of tile format would be relatively long and laborious. Further, when setting up a change of format, the machines themselves are rather complex to reset, making these operations all-in-all considerably expensive.
[0009] For relatively large-format packs of ceramic tiles (for example, 50x50 cm. and above), another type of package is known, comprising a single flat cardboard blank having a base flap, to which are connected (by fold lines) lateral flaps which fold-wrap around the lateral sides of the tile pack, finishing with at least a perimetral top surface flap to cover at least a perimetral edge and part of the topmost tile face.
[0010] In this case the package is made up using a machine which orders each tile pack on a horizontally-arranged blank, the bottom face of the pack being made to coincide with and superposed on the base flap. Then the side flaps are folded first to cover the flanks of the pack and then to obtain a perimetral frame on the topmost face of the pack.
[0011] In the above case the cardboard blank used is decidedly smaller lengthwise than the one previously described. The plan surface of the second type of cardboard blank has, all the same, a relatively large area, which leads to the drawback of a large consumption of the base materials (cardboard), with a consequent considerable increase in overall packaging costs.
[0012] A further drawback in the prior art is the need to predispose at least two machines of different types, so that tiles of both small and large format can be packaged, all of which leads to an obvious increase in packaging costs.
[0013] The main aim of the present invention is to obviate the above-mentioned drawbacks in the prior art by providing a packaging which can be applied relatively simply and rapidly to packaging of various-format objects, ranging from big to small.
[0014] An advantage of the invention is to provide a packaging which can be applied to the objects to be packaged by constructionally simple and economic packaging machines, and which can nonetheless be applied to operate on objects of varying dimensions.
[0015] A further advantage of the invention is that it provides a final packaging which costs relatively little and can be stored and moved about simply and economically.
[0016] The technical characteristics of the present invention, according to the above aims and advantages, can be clearly evinced from the contents of the appended claims.
[0017] Further characteristics and advantages of the present invention will better emerge from the detailed description that follows of a preferred but non-exclusive embodiment of the invention, illustrated purely by way of nonlimiting example in the accompanying figures of the drawings, in which:
figure 1 is a schematic perspective view of a package made according to the present invention, as it is heing applied to a pack of ceramic tiles;
figure 2 is a schematic plan view of one of two half-blanks which together make up the package of figure 1;
figure 3 is a schematic plan view of a packaging machine which can be used to apply the packaging of figure 1 to a tile pack;
figures from 4a to 4d are schematic views of a detail of figure 3, during four successive operating phases of the machine;
figure 5 shows an enlarged detail of figure 4d;
figure 6 shows a lateral view from below of figure 5.
[0018] With reference to the above-mentioned figures 1 and 2, the number 1 denotes in its entirety a package for packs 2 of flat objects piled one on top of another.
[0019] Each object exhibits in plan view a polygon shape, preferably rectangular. In this particular example the objects to be packaged are ceramic tiles 3, either square or rectangular in shape.
[0020] The package 1 comprises two half-blanks 4 made of cardboard and destined to be coupled one to another. In the present example the half-blanks 4 are identical to each other, so as to make savings in manufacturing the packages 1.
[0021] Figure 2 shows one of the two half-blanks 4. Each half-blank comprises two flaps 40, each substantially rectangular and elongate, united at a fold-line 41 at one of their short ends. Each flap 40 is destined to be arranged at a corresponding flank of a pack 2 of tiles.
[0022] In a case where the objects to be packaged have more than four sides, the half-blanks 4 can still be two in number but presenting more than two flaps each; or more than two half-blanks 4 can be used, opportunely coupled one to another.
[0023] In the illustrated embodiment, each half-blank 4 comprises, for each flap 40, two more flaps 42, namely a top flap and a bottom flap, both narrow and elongate. Each of the top-and-bottom flaps 42 is joined by a fold line 43 to a long side of the relative flap 40. The top-and-bottom flaps 42 will in use be applied to protect respectively the topmost face and the bottom-most face of the tile pack 2 to be packaged.
[0024] Each half-blank 4 further comprises, at one end, at least one tongue 44, joined by a fold line 45 to a short side of one of the two flaps 40. The tongue 44 of a half-blank 4 is destined in use to tuck over an end of the other half-blank 4.
[0025] With reference to the above-mentioned figures from 3 to 6, 5 denotes in its entirety an apparatus for packaging packs 2 of flat objects piled one on top of another. In particular the apparatus 5 can be used for packaging ceramic tiles 3 using the package 1 illustrated in figures 1 and 2.
[0026] The apparatus 5 comprises a supply line 6 supplying the packs 2 one-by-one in an advancement direction F to a packaging station 7 where each pack 2 is blocked in a predetermined position. Further, known-type means are provided in the packaging station 7 for adjusting the height of the tile pack 2.
[0027] The apparatus 5 further comprises two parallel supply lines 8 and 9, predisposed to supply the half-blanks 4 one-by-one to the packaging station 7 at a position corresponding to two opposite flanks of a pack 2 located in the packaging station.
[0028] The apparatus 5 is provided with a plurality of operating units 10, each predisposed to operate on a corner of a pack 2 arranged in the packaging station 7. In the illustrated example, where the objects to be packaged exhibit four corners, four of these operating units 10 are predisposed, each of which has at least one gripping organ 11 with which it will carry out operations on a half-blank 4.
[0029] Each gripping organ 11 is mobile on command and can near and distance to and from the interested corner. Each gripping organ 11 is guided to make the above-described movements in a direction coinciding with that of the diagonal of the pack 2 of objects passing through the corner of said pack, with reference to a plan view of the pack of tiles positioned in the packaging station 7. The gripping organs 11 are operatively situated in two opposite pairs. Two opposite gripping organs 11 can be moved in a same direction (as mentioned above, a direction coinciding with a diagonal drawn through the plan view of the pack), and indeed during operation are normally commanded to move in opposite senses in this same direction.
[0030] The gripping organs 11 are provided with a plurality of suckers 12, arranged side-by-side, which can grip a half-blank 4. Each gripping organ 11 comprises two parts 11a and 11b, each provided with suckers and being able to rotate on command one with respect to another about a vertical-axis pivot 13.
[0031] Two of the oppositely-positioned gripping organs 11 have the primary task of folding the half-blanks 4 about two opposite corners of the tile pack, while the other two gripping organs 11, also positioned opposite one another, have the principal task of realising the coupling of the tongues 44 of the half-blanks 4 with the relative ends of the other half-blanks 4.
[0032] The apparatus 5 comprises means for folding the top and bottom flaps 42 on to the topmost and bottom-most faces of the pack 2. The means for folding comprise, for each gripping organ 11, two pushers 14 solidly connected to the relative gripping organ 11. Each pusher 14 is mobile on command according to an advancement direction which, during operation, is perpendicular to an edge of a top or bottom face of the tile pack and is also parallel and proximal to the plan of the top or bottom face. By virtue of these movements the pusher 14 can selectively assume at least one inactive position (represented by the broken line in figure 5), external to the edge of the face, and an active position (represented by a continuous line in figure 5) which is internal to the edge. During the movement from the inactive into the active positions the pusher 14 interacts contactingly with a vertically-disposed top or bottom flap 42 in order to fold it down on to the corresponding topmost or hottom-most face of the tile pack.
[0033] As shown in figures 5 and 6, each operative unit 10 comprises, for each operative side, a top and a bottom pusher 14, which logically are destined to act on a top flap and a bottom flap respectively. Each pusher 14 is frontally provided with a horizontal platelet 15 which interacts contactingly with a top/bottom flap 42 to fold it onto the relative top or bottom face of the tile pack 2.
[0034] Each gripping organ 11 is mobile on command of a linear actuator 16, preferably hydraulic, which exhibits an end which bears the relative gripping organ 11, while another end is hinged to a vertical-axis pivot 17. The actuators 16 are positioned so that their axis of action is in line with the diagonals of the tile pack 2 situated in the packaging station 7.
[0035] The supply lines 8 and 9 of the half-blanks each comprise a conveyor device having a plurality of roller pairs 18 for drawing the half-blanks 4. The roller pairs 18 are arranged on two opposite sides of the supply line 6 of the tile packs 2, and are aligned one after another in respective half-blank 4 advancement directions G and H. A flexible organ, of known type and not illustrated, and constituted for example by a belt, is wound about at least one line of roller pairs 18 so that it runs, drawn by the rollers themselves, in the advancement direction G or H, in contact with the half-blank 4.
[0036] Each supply line 8 and 9 comprises a store 19 of half-blanks 4, in which the half-blanks are piled one on another, and a transfer device 20 able to collect the half-blanks 4 one at a time from the store 19 and send them one-by-one to the relative roller conveyor device 18. Each transport device 20 comprises at least one moving arm, equipped with suckers, for gripping the half-blank 4 located horizontally at the top of the store pile, rotate it by 90° and insert it vertically between two parallel lines of rollers 18.
[0038] An ordered succession of tile packs 2 is supplied to the packaging station 7. Each pack 2 is located at a predetermined point at the station 7 under the control of means for positioning of known type and not illustrated. The supply of the packs 2 is synchronically co-ordinated with that of two lines of half-blanks 4 in positions corresponding to two opposite flanks of a pack 2 positioned in the packaging station 7. The half-blanks 4 are taken one-by-one from the relative stores 19 and inserted into the roller conveyor 18.
[0039] In the illustrated case, with reference to the plan view of figure 3, the half-blank 4 which advances, drawn by the rollers 18, along the right-hand side (with reference to advancement direction G), is stopped at a predetermined position in which it can be gripped by the relative suckers 12 of the operative unit 10 which in figure 3 is illustrated low down on the right. The half-blank 4 which advances on the left side (with reference to advancement direction H) is gripped by the diametrically-opposite operative unit 10, illustrated high up on the left. The two operative units 10 act along the same diagonal of the pack 2. The operative units 10 grip the two half-blanks 4 and near them to the corners of the pack 2 in the packaging station 7. The position of the pack 2 in a vertical direction can be regulated in order to make sure the half-blanks 4 fit perfectly against the flanks of the tile pack 2. The half-blanks 4 are neared by direct movements according to the diagonal of the tile pack 2. When the half-blanks 4 are gripped by the gripping organ 11, the two parts 11a and 11b are positioned such as to have their axis of rotation very close to the fold line 41 between the two flaps 40. A first half-blank 4 (for example, the one advancing on the right side) is neared to the first corner (for example the corner low down on the right in figure 3) so as to near a flap 40 to a first flank (the right flank, with reference to advancement direction F) of the tile pack 2, so that the fold line 41 between the two flaps 40 more-or-less coincides with the first corner.
[0040] The second half-blank 4 (the one which advances on the left side) is neared to the second comer (the one high up on the left in figure 3) so as to near a flap 40 to a second flank (the left flank, with reference to advancement direction F) of the pack opposite the first, so that the fold line 41 between the two flaps more-or-less coincides with the second comer, diametrically opposite to the first. Figure 4a shows the above-described situation, in which flaps 40 of the half-blanks 4 are brought into contact with two opposite flanks of the tile pack 2.
[0041] Subsequently (figure 4b) the other flaps 40 of the half-blanks 4 are folded about their respective fold lines 41 so that the flaps are brought into contact with the other two flanks of the tile pack 2. The flaps are folded by means of a 90° rotation (in anticlockwise direction with reference to figure 4b) of a rotatable part 11b of the gripper organs.
[0042] The pushers 14 of the two operating units 10 gripping the half-blanks 4 are then commanded to advance in order to fold the top and bottom flaps 42 down onto the topmost and bottom-most faces of the tile pack 2. This phase is schematically illustrated in figure 4c.
[0043] The two other operative units 10 are then neared to the two other comers by means of a displacement along the diagonal of the tile pack 2 passing through the corners of the pack 2 itself. During and by effect of the nearing action the tongue 44 of a half-blank 4 is folded by 90° and brought into contact with an end of the other half-blank 4. Then the rotatable part 11b of the gripping elements 11 is rotated by 90° and the pushers 14 are commanded to advance in order to complete the folding operation on the top and bottom flaps 42. On completion of the above all four corners of the pack 2 are interested by the gripper elements 11.
[0044] At this point the operative units 10 are commanded to retreat, once more moving along the diagonals. The packaged tile pack 2 continues along the supply line 6 while the next pack 2 and the relative half-blanks 4 are transported towards the packaging station 7 so that a new work cycle can begin.
[0045] The apparatus 5 enables tiles of various format to be packaged. To reset the apparatus for a change of format, only a few simple operations are needed. In particular, the four operative units 10 can carry out their function on tiles 3 of any format; for this purpose the tile packs 2 must be positioned at the centre of the packaging station 7 so that the four corners of a pack 2 are situated along the lines of action of the operative units 10, that is, with the diagonals of the tile pack 2 coinciding with the above-mentioned lines of action. Suitable means for positioning are required, of known type and not illustrated, which can stop the pack 2 in a correct position, i.e. when it is centred with respect to the operative units 10. Figure 3 schematically shows (in mixed broken lines) the correct positions for packs 2 of various format. In the various evidenced positions, the packs 2 of tiles, whatever their formats, can in any case be located in a centred position with respect to the operative units 10, so that the nearing movement of the units 10 occurs along the same lines of action in each case.
[0046] Experiments have shown that the use of oppositely-situated coupled operative units improves the stability of the tile pack 2 during the various phases of the packaging process. During apparatus functioning, the action of an operative unit 10 is in part contrasted by a contemporaneous action of the opposite operative unit 10, so that together the two units 10 contribute to blocking the tile pack 2 during the packaging process.
1. A package (1) for packs (2) of flat objects piled one on top of another, each object
(3) having a polygonal and preferably rectangular shape, characterised in that it
comprises at least two half-blanks (4) made of cardboard, each of which half-blanks
(4) comprises:
at least two flaps (40), each rectangular and elongate, joined together along a fold line (41) at a short side thereof, each flap (40) being destined in use to follow a profile of a flank of a pack (2) of objects (3);
a top and a bottom flap (42) associated to each said flap (4), said top and bottom flaps (42) being narrow and elongate and each being joined by a fold line (42) to a long side of a flap (40), and being destined in use to follow a perimeter profile of a topmost face or a bottom-most face of a pack (2) of objects (3);
at least one tongue (44), joined by a fold line (45) to a short side of one of the at least two flaps (40), which short side is opposite a short side at which the at least two flaps (40) are joined, the at least one tongue (44) of a half-blank (4) being destined to be superposed on an end of another half-blank (4).
2. The package of claim 1, characterised in that the half-blanks (4) made of cardboard
are identical one to another.
3. The package of claim 1 or 2, characterised in that the objects (3) are constituted
by ceramic tiles (3).